./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya --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 fbe9f324c9eba6beb8c990e3f85f0b00a68548fe05ffdb4e97bc061354d1cdf2 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 02:43:13,884 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 02:43:13,965 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 02:43:13,970 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 02:43:13,970 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 02:43:13,995 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 02:43:13,995 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 02:43:13,996 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 02:43:13,997 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 02:43:13,997 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 02:43:13,998 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 02:43:13,998 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 02:43:13,999 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 02:43:13,999 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 02:43:14,000 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 02:43:14,000 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 02:43:14,001 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 02:43:14,001 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 02:43:14,002 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 02:43:14,002 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 02:43:14,003 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 02:43:14,004 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 02:43:14,004 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 02:43:14,005 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 02:43:14,005 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 02:43:14,005 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 02:43:14,006 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 02:43:14,006 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 02:43:14,006 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 02:43:14,007 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 02:43:14,007 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 02:43:14,008 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 02:43:14,008 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 02:43:14,008 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 02:43:14,008 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 02:43:14,009 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 02:43:14,009 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 02:43:14,009 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 02:43:14,009 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 02:43:14,009 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 02:43:14,010 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 02:43:14,010 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 02:43:14,010 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_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fbe9f324c9eba6beb8c990e3f85f0b00a68548fe05ffdb4e97bc061354d1cdf2 [2023-11-29 02:43:14,230 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 02:43:14,249 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 02:43:14,252 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 02:43:14,252 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 02:43:14,253 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 02:43:14,254 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c [2023-11-29 02:43:16,957 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 02:43:17,167 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 02:43:17,168 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c [2023-11-29 02:43:17,175 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/data/0190fb22f/45e4467a144f4069a53d77fe428dc246/FLAG9e880d560 [2023-11-29 02:43:17,189 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/data/0190fb22f/45e4467a144f4069a53d77fe428dc246 [2023-11-29 02:43:17,191 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 02:43:17,192 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 02:43:17,193 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 02:43:17,193 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 02:43:17,198 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 02:43:17,198 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:43:17" (1/1) ... [2023-11-29 02:43:17,199 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@382f5a65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:43:17, skipping insertion in model container [2023-11-29 02:43:17,200 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:43:17" (1/1) ... [2023-11-29 02:43:17,224 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 02:43:17,407 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_b0a3a636-54c8-4379-ad30-62ab24019973/sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c[2707,2720] [2023-11-29 02:43:17,416 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:43:17,426 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 02:43:17,460 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_b0a3a636-54c8-4379-ad30-62ab24019973/sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c[2707,2720] [2023-11-29 02:43:17,464 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:43:17,472 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 02:43:17,472 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 02:43:17,479 INFO L206 MainTranslator]: Completed translation [2023-11-29 02:43:17,480 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:43:17 WrapperNode [2023-11-29 02:43:17,480 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 02:43:17,481 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 02:43:17,481 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 02:43:17,481 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 02:43:17,489 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:43:17" (1/1) ... [2023-11-29 02:43:17,497 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:43:17" (1/1) ... [2023-11-29 02:43:17,525 INFO L138 Inliner]: procedures = 24, calls = 45, calls flagged for inlining = 13, calls inlined = 15, statements flattened = 203 [2023-11-29 02:43:17,525 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 02:43:17,526 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 02:43:17,526 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 02:43:17,526 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 02:43:17,538 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:43:17" (1/1) ... [2023-11-29 02:43:17,538 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:43:17" (1/1) ... [2023-11-29 02:43:17,541 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:43:17" (1/1) ... [2023-11-29 02:43:17,557 INFO L175 MemorySlicer]: Split 18 memory accesses to 4 slices as follows [2, 2, 2, 12]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 4 writes are split as follows [0, 1, 1, 2]. [2023-11-29 02:43:17,557 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:43:17" (1/1) ... [2023-11-29 02:43:17,557 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:43:17" (1/1) ... [2023-11-29 02:43:17,567 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:43:17" (1/1) ... [2023-11-29 02:43:17,571 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:43:17" (1/1) ... [2023-11-29 02:43:17,574 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:43:17" (1/1) ... [2023-11-29 02:43:17,576 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:43:17" (1/1) ... [2023-11-29 02:43:17,580 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 02:43:17,580 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 02:43:17,581 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 02:43:17,581 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 02:43:17,581 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:43:17" (1/1) ... [2023-11-29 02:43:17,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 02:43:17,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:43:17,610 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 02:43:17,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 02:43:17,650 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 02:43:17,650 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-29 02:43:17,650 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-29 02:43:17,650 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-29 02:43:17,650 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-29 02:43:17,651 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 02:43:17,651 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 02:43:17,651 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 02:43:17,651 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 02:43:17,651 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 02:43:17,652 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 02:43:17,652 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 02:43:17,652 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 02:43:17,652 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-29 02:43:17,652 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-29 02:43:17,653 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-29 02:43:17,653 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 02:43:17,653 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 02:43:17,653 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 02:43:17,653 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 02:43:17,653 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 02:43:17,654 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 02:43:17,654 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-29 02:43:17,654 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 02:43:17,655 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-29 02:43:17,771 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 02:43:17,773 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 02:43:18,076 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 02:43:18,329 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 02:43:18,329 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-29 02:43:18,329 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:43:18 BoogieIcfgContainer [2023-11-29 02:43:18,330 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 02:43:18,332 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 02:43:18,332 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 02:43:18,334 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 02:43:18,335 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 02:43:17" (1/3) ... [2023-11-29 02:43:18,335 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17195aa0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:43:18, skipping insertion in model container [2023-11-29 02:43:18,335 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:43:17" (2/3) ... [2023-11-29 02:43:18,336 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17195aa0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:43:18, skipping insertion in model container [2023-11-29 02:43:18,336 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:43:18" (3/3) ... [2023-11-29 02:43:18,337 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-counter-fun.wvr.c [2023-11-29 02:43:18,345 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-29 02:43:18,354 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 02:43:18,354 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 02:43:18,354 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 02:43:18,436 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-29 02:43:18,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 30 places, 27 transitions, 68 flow [2023-11-29 02:43:18,489 INFO L124 PetriNetUnfolderBase]: 4/25 cut-off events. [2023-11-29 02:43:18,489 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 02:43:18,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34 conditions, 25 events. 4/25 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 28 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 15. Up to 2 conditions per place. [2023-11-29 02:43:18,492 INFO L82 GeneralOperation]: Start removeDead. Operand has 30 places, 27 transitions, 68 flow [2023-11-29 02:43:18,496 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 27 places, 24 transitions, 60 flow [2023-11-29 02:43:18,506 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 02:43:18,512 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;@73970c12, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 02:43:18,512 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-29 02:43:18,523 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 02:43:18,523 INFO L124 PetriNetUnfolderBase]: 4/23 cut-off events. [2023-11-29 02:43:18,523 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 02:43:18,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:43:18,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:43:18,524 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:43:18,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:43:18,528 INFO L85 PathProgramCache]: Analyzing trace with hash 344802912, now seen corresponding path program 1 times [2023-11-29 02:43:18,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:43:18,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310592829] [2023-11-29 02:43:18,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:43:18,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:43:18,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:43:18,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:43:18,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:43:18,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310592829] [2023-11-29 02:43:18,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310592829] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:43:18,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:43:18,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 02:43:18,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164954848] [2023-11-29 02:43:18,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:43:18,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:43:18,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:43:18,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:43:18,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:43:18,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2023-11-29 02:43:18,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 24 transitions, 60 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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) [2023-11-29 02:43:18,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:43:18,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2023-11-29 02:43:18,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:43:18,956 INFO L124 PetriNetUnfolderBase]: 101/199 cut-off events. [2023-11-29 02:43:18,956 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-29 02:43:18,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 407 conditions, 199 events. 101/199 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 643 event pairs, 24 based on Foata normal form. 1/197 useless extension candidates. Maximal degree in co-relation 317. Up to 122 conditions per place. [2023-11-29 02:43:18,960 INFO L140 encePairwiseOnDemand]: 23/27 looper letters, 29 selfloop transitions, 3 changer transitions 1/36 dead transitions. [2023-11-29 02:43:18,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 36 transitions, 159 flow [2023-11-29 02:43:18,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:43:18,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:43:18,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 49 transitions. [2023-11-29 02:43:18,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6049382716049383 [2023-11-29 02:43:18,970 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 49 transitions. [2023-11-29 02:43:18,971 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 49 transitions. [2023-11-29 02:43:18,971 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:43:18,973 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 49 transitions. [2023-11-29 02:43:18,975 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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) [2023-11-29 02:43:18,978 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 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) [2023-11-29 02:43:18,978 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 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) [2023-11-29 02:43:18,979 INFO L175 Difference]: Start difference. First operand has 27 places, 24 transitions, 60 flow. Second operand 3 states and 49 transitions. [2023-11-29 02:43:18,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 36 transitions, 159 flow [2023-11-29 02:43:18,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 36 transitions, 145 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 02:43:18,984 INFO L231 Difference]: Finished difference. Result has 26 places, 26 transitions, 71 flow [2023-11-29 02:43:18,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=71, PETRI_PLACES=26, PETRI_TRANSITIONS=26} [2023-11-29 02:43:18,989 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, -1 predicate places. [2023-11-29 02:43:18,989 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 26 transitions, 71 flow [2023-11-29 02:43:18,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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) [2023-11-29 02:43:18,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:43:18,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:43:18,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 02:43:18,990 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:43:18,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:43:18,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1629858922, now seen corresponding path program 1 times [2023-11-29 02:43:18,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:43:18,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868584642] [2023-11-29 02:43:18,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:43:18,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:43:19,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:43:19,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:43:19,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:43:19,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868584642] [2023-11-29 02:43:19,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868584642] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:43:19,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:43:19,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 02:43:19,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950119861] [2023-11-29 02:43:19,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:43:19,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 02:43:19,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:43:19,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 02:43:19,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 02:43:19,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2023-11-29 02:43:19,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 26 transitions, 71 flow. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 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) [2023-11-29 02:43:19,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:43:19,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2023-11-29 02:43:19,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:43:19,332 INFO L124 PetriNetUnfolderBase]: 195/348 cut-off events. [2023-11-29 02:43:19,332 INFO L125 PetriNetUnfolderBase]: For 37/37 co-relation queries the response was YES. [2023-11-29 02:43:19,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 787 conditions, 348 events. 195/348 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1373 event pairs, 66 based on Foata normal form. 0/318 useless extension candidates. Maximal degree in co-relation 210. Up to 201 conditions per place. [2023-11-29 02:43:19,342 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 40 selfloop transitions, 9 changer transitions 1/52 dead transitions. [2023-11-29 02:43:19,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 52 transitions, 244 flow [2023-11-29 02:43:19,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 02:43:19,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 02:43:19,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 66 transitions. [2023-11-29 02:43:19,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4888888888888889 [2023-11-29 02:43:19,349 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 66 transitions. [2023-11-29 02:43:19,350 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 66 transitions. [2023-11-29 02:43:19,351 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:43:19,351 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 66 transitions. [2023-11-29 02:43:19,352 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 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) [2023-11-29 02:43:19,355 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 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) [2023-11-29 02:43:19,357 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 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) [2023-11-29 02:43:19,357 INFO L175 Difference]: Start difference. First operand has 26 places, 26 transitions, 71 flow. Second operand 5 states and 66 transitions. [2023-11-29 02:43:19,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 52 transitions, 244 flow [2023-11-29 02:43:19,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 52 transitions, 237 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 02:43:19,365 INFO L231 Difference]: Finished difference. Result has 32 places, 34 transitions, 126 flow [2023-11-29 02:43:19,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=126, PETRI_PLACES=32, PETRI_TRANSITIONS=34} [2023-11-29 02:43:19,369 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 5 predicate places. [2023-11-29 02:43:19,369 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 34 transitions, 126 flow [2023-11-29 02:43:19,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 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) [2023-11-29 02:43:19,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:43:19,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:43:19,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 02:43:19,371 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:43:19,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:43:19,388 INFO L85 PathProgramCache]: Analyzing trace with hash -854956140, now seen corresponding path program 2 times [2023-11-29 02:43:19,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:43:19,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483387988] [2023-11-29 02:43:19,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:43:19,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:43:19,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:43:19,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:43:19,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:43:19,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483387988] [2023-11-29 02:43:19,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483387988] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:43:19,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:43:19,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 02:43:19,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308131922] [2023-11-29 02:43:19,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:43:19,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 02:43:19,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:43:19,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 02:43:19,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-29 02:43:19,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2023-11-29 02:43:19,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 34 transitions, 126 flow. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 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) [2023-11-29 02:43:19,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:43:19,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2023-11-29 02:43:19,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:43:19,733 INFO L124 PetriNetUnfolderBase]: 242/451 cut-off events. [2023-11-29 02:43:19,734 INFO L125 PetriNetUnfolderBase]: For 211/211 co-relation queries the response was YES. [2023-11-29 02:43:19,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1257 conditions, 451 events. 242/451 cut-off events. For 211/211 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1991 event pairs, 27 based on Foata normal form. 14/463 useless extension candidates. Maximal degree in co-relation 599. Up to 130 conditions per place. [2023-11-29 02:43:19,737 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 65 selfloop transitions, 12 changer transitions 1/80 dead transitions. [2023-11-29 02:43:19,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 80 transitions, 449 flow [2023-11-29 02:43:19,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 02:43:19,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 02:43:19,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 95 transitions. [2023-11-29 02:43:19,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5026455026455027 [2023-11-29 02:43:19,739 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 95 transitions. [2023-11-29 02:43:19,740 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 95 transitions. [2023-11-29 02:43:19,740 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:43:19,740 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 95 transitions. [2023-11-29 02:43:19,741 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 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) [2023-11-29 02:43:19,742 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 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) [2023-11-29 02:43:19,743 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 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) [2023-11-29 02:43:19,743 INFO L175 Difference]: Start difference. First operand has 32 places, 34 transitions, 126 flow. Second operand 7 states and 95 transitions. [2023-11-29 02:43:19,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 80 transitions, 449 flow [2023-11-29 02:43:19,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 80 transitions, 449 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-29 02:43:19,747 INFO L231 Difference]: Finished difference. Result has 43 places, 40 transitions, 214 flow [2023-11-29 02:43:19,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=214, PETRI_PLACES=43, PETRI_TRANSITIONS=40} [2023-11-29 02:43:19,748 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 16 predicate places. [2023-11-29 02:43:19,749 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 40 transitions, 214 flow [2023-11-29 02:43:19,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 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) [2023-11-29 02:43:19,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:43:19,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:43:19,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 02:43:19,749 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:43:19,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:43:19,750 INFO L85 PathProgramCache]: Analyzing trace with hash 449448984, now seen corresponding path program 3 times [2023-11-29 02:43:19,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:43:19,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388897283] [2023-11-29 02:43:19,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:43:19,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:43:19,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:43:19,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:43:19,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:43:19,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388897283] [2023-11-29 02:43:19,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388897283] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:43:19,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:43:19,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 02:43:19,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413329713] [2023-11-29 02:43:19,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:43:19,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 02:43:19,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:43:19,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 02:43:19,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 02:43:19,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2023-11-29 02:43:19,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 40 transitions, 214 flow. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 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) [2023-11-29 02:43:19,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:43:19,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2023-11-29 02:43:19,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:43:20,060 INFO L124 PetriNetUnfolderBase]: 308/567 cut-off events. [2023-11-29 02:43:20,060 INFO L125 PetriNetUnfolderBase]: For 920/920 co-relation queries the response was YES. [2023-11-29 02:43:20,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1928 conditions, 567 events. 308/567 cut-off events. For 920/920 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2548 event pairs, 97 based on Foata normal form. 2/562 useless extension candidates. Maximal degree in co-relation 1427. Up to 279 conditions per place. [2023-11-29 02:43:20,066 INFO L140 encePairwiseOnDemand]: 21/27 looper letters, 55 selfloop transitions, 10 changer transitions 4/71 dead transitions. [2023-11-29 02:43:20,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 71 transitions, 509 flow [2023-11-29 02:43:20,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 02:43:20,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 02:43:20,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 66 transitions. [2023-11-29 02:43:20,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4888888888888889 [2023-11-29 02:43:20,068 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 66 transitions. [2023-11-29 02:43:20,068 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 66 transitions. [2023-11-29 02:43:20,068 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:43:20,068 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 66 transitions. [2023-11-29 02:43:20,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 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) [2023-11-29 02:43:20,070 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 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) [2023-11-29 02:43:20,070 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 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) [2023-11-29 02:43:20,070 INFO L175 Difference]: Start difference. First operand has 43 places, 40 transitions, 214 flow. Second operand 5 states and 66 transitions. [2023-11-29 02:43:20,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 71 transitions, 509 flow [2023-11-29 02:43:20,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 71 transitions, 497 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-29 02:43:20,077 INFO L231 Difference]: Finished difference. Result has 49 places, 42 transitions, 261 flow [2023-11-29 02:43:20,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=261, PETRI_PLACES=49, PETRI_TRANSITIONS=42} [2023-11-29 02:43:20,078 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 22 predicate places. [2023-11-29 02:43:20,078 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 42 transitions, 261 flow [2023-11-29 02:43:20,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 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) [2023-11-29 02:43:20,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:43:20,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:43:20,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 02:43:20,079 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:43:20,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:43:20,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1052480995, now seen corresponding path program 1 times [2023-11-29 02:43:20,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:43:20,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885125054] [2023-11-29 02:43:20,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:43:20,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:43:20,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:43:20,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:43:20,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:43:20,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885125054] [2023-11-29 02:43:20,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885125054] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:43:20,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:43:20,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 02:43:20,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984305677] [2023-11-29 02:43:20,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:43:20,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 02:43:20,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:43:20,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 02:43:20,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 02:43:20,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2023-11-29 02:43:20,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 42 transitions, 261 flow. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 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) [2023-11-29 02:43:20,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:43:20,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2023-11-29 02:43:20,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:43:20,373 INFO L124 PetriNetUnfolderBase]: 327/596 cut-off events. [2023-11-29 02:43:20,374 INFO L125 PetriNetUnfolderBase]: For 1331/1335 co-relation queries the response was YES. [2023-11-29 02:43:20,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2171 conditions, 596 events. 327/596 cut-off events. For 1331/1335 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2746 event pairs, 116 based on Foata normal form. 4/594 useless extension candidates. Maximal degree in co-relation 1915. Up to 314 conditions per place. [2023-11-29 02:43:20,381 INFO L140 encePairwiseOnDemand]: 21/27 looper letters, 54 selfloop transitions, 7 changer transitions 8/72 dead transitions. [2023-11-29 02:43:20,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 72 transitions, 545 flow [2023-11-29 02:43:20,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 02:43:20,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 02:43:20,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 70 transitions. [2023-11-29 02:43:20,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5185185185185185 [2023-11-29 02:43:20,383 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 70 transitions. [2023-11-29 02:43:20,383 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 70 transitions. [2023-11-29 02:43:20,383 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:43:20,383 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 70 transitions. [2023-11-29 02:43:20,384 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 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) [2023-11-29 02:43:20,384 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 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) [2023-11-29 02:43:20,385 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 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) [2023-11-29 02:43:20,385 INFO L175 Difference]: Start difference. First operand has 49 places, 42 transitions, 261 flow. Second operand 5 states and 70 transitions. [2023-11-29 02:43:20,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 72 transitions, 545 flow [2023-11-29 02:43:20,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 72 transitions, 506 flow, removed 14 selfloop flow, removed 2 redundant places. [2023-11-29 02:43:20,393 INFO L231 Difference]: Finished difference. Result has 52 places, 42 transitions, 263 flow [2023-11-29 02:43:20,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=241, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=263, PETRI_PLACES=52, PETRI_TRANSITIONS=42} [2023-11-29 02:43:20,394 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 25 predicate places. [2023-11-29 02:43:20,394 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 42 transitions, 263 flow [2023-11-29 02:43:20,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 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) [2023-11-29 02:43:20,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:43:20,395 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:43:20,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-29 02:43:20,395 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:43:20,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:43:20,396 INFO L85 PathProgramCache]: Analyzing trace with hash -436614979, now seen corresponding path program 2 times [2023-11-29 02:43:20,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:43:20,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75709753] [2023-11-29 02:43:20,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:43:20,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:43:20,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:43:20,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:43:20,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:43:20,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75709753] [2023-11-29 02:43:20,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75709753] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:43:20,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342219565] [2023-11-29 02:43:20,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:43:20,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:43:20,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:43:20,492 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:43:20,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 02:43:20,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:43:20,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:43:20,613 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 02:43:20,618 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:43:20,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:43:20,667 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:43:20,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:43:20,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342219565] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:43:20,699 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:43:20,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2023-11-29 02:43:20,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811928695] [2023-11-29 02:43:20,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:43:20,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 02:43:20,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:43:20,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 02:43:20,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-29 02:43:20,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2023-11-29 02:43:20,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 42 transitions, 263 flow. Second operand has 9 states, 9 states have (on average 6.0) internal successors, (54), 9 states have internal predecessors, (54), 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) [2023-11-29 02:43:20,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:43:20,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2023-11-29 02:43:20,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:43:21,102 INFO L124 PetriNetUnfolderBase]: 448/779 cut-off events. [2023-11-29 02:43:21,102 INFO L125 PetriNetUnfolderBase]: For 1965/1965 co-relation queries the response was YES. [2023-11-29 02:43:21,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2848 conditions, 779 events. 448/779 cut-off events. For 1965/1965 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3373 event pairs, 22 based on Foata normal form. 12/789 useless extension candidates. Maximal degree in co-relation 2267. Up to 152 conditions per place. [2023-11-29 02:43:21,111 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 80 selfloop transitions, 52 changer transitions 2/135 dead transitions. [2023-11-29 02:43:21,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 135 transitions, 1058 flow [2023-11-29 02:43:21,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 02:43:21,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-29 02:43:21,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 140 transitions. [2023-11-29 02:43:21,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37037037037037035 [2023-11-29 02:43:21,114 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 140 transitions. [2023-11-29 02:43:21,114 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 140 transitions. [2023-11-29 02:43:21,114 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:43:21,114 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 140 transitions. [2023-11-29 02:43:21,115 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 10.0) internal successors, (140), 14 states have internal predecessors, (140), 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) [2023-11-29 02:43:21,116 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 27.0) internal successors, (405), 15 states have internal predecessors, (405), 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) [2023-11-29 02:43:21,117 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 27.0) internal successors, (405), 15 states have internal predecessors, (405), 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) [2023-11-29 02:43:21,117 INFO L175 Difference]: Start difference. First operand has 52 places, 42 transitions, 263 flow. Second operand 14 states and 140 transitions. [2023-11-29 02:43:21,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 135 transitions, 1058 flow [2023-11-29 02:43:21,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 135 transitions, 1001 flow, removed 7 selfloop flow, removed 3 redundant places. [2023-11-29 02:43:21,127 INFO L231 Difference]: Finished difference. Result has 66 places, 80 transitions, 680 flow [2023-11-29 02:43:21,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=680, PETRI_PLACES=66, PETRI_TRANSITIONS=80} [2023-11-29 02:43:21,128 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 39 predicate places. [2023-11-29 02:43:21,128 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 80 transitions, 680 flow [2023-11-29 02:43:21,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 9 states have internal predecessors, (54), 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) [2023-11-29 02:43:21,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:43:21,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:43:21,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 02:43:21,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:43:21,330 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:43:21,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:43:21,331 INFO L85 PathProgramCache]: Analyzing trace with hash 554147766, now seen corresponding path program 4 times [2023-11-29 02:43:21,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:43:21,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797518437] [2023-11-29 02:43:21,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:43:21,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:43:21,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:43:21,418 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:43:21,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:43:21,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797518437] [2023-11-29 02:43:21,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797518437] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:43:21,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:43:21,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 02:43:21,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076426780] [2023-11-29 02:43:21,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:43:21,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 02:43:21,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:43:21,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 02:43:21,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-29 02:43:21,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2023-11-29 02:43:21,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 80 transitions, 680 flow. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 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) [2023-11-29 02:43:21,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:43:21,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2023-11-29 02:43:21,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:43:21,598 INFO L124 PetriNetUnfolderBase]: 437/762 cut-off events. [2023-11-29 02:43:21,598 INFO L125 PetriNetUnfolderBase]: For 2499/2499 co-relation queries the response was YES. [2023-11-29 02:43:21,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3138 conditions, 762 events. 437/762 cut-off events. For 2499/2499 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3285 event pairs, 147 based on Foata normal form. 8/768 useless extension candidates. Maximal degree in co-relation 2758. Up to 474 conditions per place. [2023-11-29 02:43:21,604 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 78 selfloop transitions, 27 changer transitions 0/106 dead transitions. [2023-11-29 02:43:21,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 106 transitions, 1022 flow [2023-11-29 02:43:21,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 02:43:21,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 02:43:21,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 65 transitions. [2023-11-29 02:43:21,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2023-11-29 02:43:21,605 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 65 transitions. [2023-11-29 02:43:21,605 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 65 transitions. [2023-11-29 02:43:21,606 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:43:21,606 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 65 transitions. [2023-11-29 02:43:21,606 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 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) [2023-11-29 02:43:21,607 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 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) [2023-11-29 02:43:21,607 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 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) [2023-11-29 02:43:21,607 INFO L175 Difference]: Start difference. First operand has 66 places, 80 transitions, 680 flow. Second operand 5 states and 65 transitions. [2023-11-29 02:43:21,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 106 transitions, 1022 flow [2023-11-29 02:43:21,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 106 transitions, 957 flow, removed 23 selfloop flow, removed 2 redundant places. [2023-11-29 02:43:21,629 INFO L231 Difference]: Finished difference. Result has 68 places, 81 transitions, 684 flow [2023-11-29 02:43:21,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=597, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=684, PETRI_PLACES=68, PETRI_TRANSITIONS=81} [2023-11-29 02:43:21,630 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 41 predicate places. [2023-11-29 02:43:21,631 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 81 transitions, 684 flow [2023-11-29 02:43:21,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 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) [2023-11-29 02:43:21,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:43:21,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:43:21,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-29 02:43:21,631 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:43:21,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:43:21,632 INFO L85 PathProgramCache]: Analyzing trace with hash 357640129, now seen corresponding path program 3 times [2023-11-29 02:43:21,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:43:21,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813912427] [2023-11-29 02:43:21,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:43:21,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:43:21,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:43:21,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:43:21,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:43:21,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813912427] [2023-11-29 02:43:21,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813912427] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:43:21,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:43:21,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 02:43:21,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836383638] [2023-11-29 02:43:21,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:43:21,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 02:43:21,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:43:21,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 02:43:21,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-29 02:43:21,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2023-11-29 02:43:21,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 81 transitions, 684 flow. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 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) [2023-11-29 02:43:21,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:43:21,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2023-11-29 02:43:21,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:43:21,980 INFO L124 PetriNetUnfolderBase]: 449/782 cut-off events. [2023-11-29 02:43:21,980 INFO L125 PetriNetUnfolderBase]: For 2624/2624 co-relation queries the response was YES. [2023-11-29 02:43:21,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3261 conditions, 782 events. 449/782 cut-off events. For 2624/2624 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3395 event pairs, 149 based on Foata normal form. 8/788 useless extension candidates. Maximal degree in co-relation 2946. Up to 474 conditions per place. [2023-11-29 02:43:21,988 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 82 selfloop transitions, 34 changer transitions 0/117 dead transitions. [2023-11-29 02:43:21,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 117 transitions, 1110 flow [2023-11-29 02:43:21,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 02:43:21,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 02:43:21,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 74 transitions. [2023-11-29 02:43:21,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4567901234567901 [2023-11-29 02:43:21,989 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 74 transitions. [2023-11-29 02:43:21,990 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 74 transitions. [2023-11-29 02:43:21,990 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:43:21,990 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 74 transitions. [2023-11-29 02:43:21,990 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 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) [2023-11-29 02:43:21,991 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 27.0) internal successors, (189), 7 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:43:21,991 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 27.0) internal successors, (189), 7 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:43:21,991 INFO L175 Difference]: Start difference. First operand has 68 places, 81 transitions, 684 flow. Second operand 6 states and 74 transitions. [2023-11-29 02:43:21,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 117 transitions, 1110 flow [2023-11-29 02:43:21,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 117 transitions, 1038 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 02:43:22,002 INFO L231 Difference]: Finished difference. Result has 70 places, 84 transitions, 725 flow [2023-11-29 02:43:22,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=615, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=725, PETRI_PLACES=70, PETRI_TRANSITIONS=84} [2023-11-29 02:43:22,003 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 43 predicate places. [2023-11-29 02:43:22,003 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 84 transitions, 725 flow [2023-11-29 02:43:22,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 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) [2023-11-29 02:43:22,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:43:22,003 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:43:22,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-29 02:43:22,004 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:43:22,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:43:22,004 INFO L85 PathProgramCache]: Analyzing trace with hash 792013491, now seen corresponding path program 4 times [2023-11-29 02:43:22,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:43:22,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64596087] [2023-11-29 02:43:22,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:43:22,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:43:22,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:43:22,084 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:43:22,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:43:22,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64596087] [2023-11-29 02:43:22,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64596087] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:43:22,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:43:22,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 02:43:22,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764586684] [2023-11-29 02:43:22,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:43:22,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 02:43:22,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:43:22,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 02:43:22,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 02:43:22,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2023-11-29 02:43:22,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 84 transitions, 725 flow. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 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) [2023-11-29 02:43:22,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:43:22,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2023-11-29 02:43:22,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:43:22,307 INFO L124 PetriNetUnfolderBase]: 406/734 cut-off events. [2023-11-29 02:43:22,307 INFO L125 PetriNetUnfolderBase]: For 2509/2522 co-relation queries the response was YES. [2023-11-29 02:43:22,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3097 conditions, 734 events. 406/734 cut-off events. For 2509/2522 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3323 event pairs, 131 based on Foata normal form. 4/728 useless extension candidates. Maximal degree in co-relation 2709. Up to 436 conditions per place. [2023-11-29 02:43:22,315 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 64 selfloop transitions, 23 changer transitions 5/110 dead transitions. [2023-11-29 02:43:22,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 110 transitions, 1050 flow [2023-11-29 02:43:22,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 02:43:22,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 02:43:22,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 65 transitions. [2023-11-29 02:43:22,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2023-11-29 02:43:22,317 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 65 transitions. [2023-11-29 02:43:22,317 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 65 transitions. [2023-11-29 02:43:22,317 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:43:22,317 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 65 transitions. [2023-11-29 02:43:22,317 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 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) [2023-11-29 02:43:22,318 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 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) [2023-11-29 02:43:22,318 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 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) [2023-11-29 02:43:22,318 INFO L175 Difference]: Start difference. First operand has 70 places, 84 transitions, 725 flow. Second operand 5 states and 65 transitions. [2023-11-29 02:43:22,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 110 transitions, 1050 flow [2023-11-29 02:43:22,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 110 transitions, 1002 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 02:43:22,328 INFO L231 Difference]: Finished difference. Result has 72 places, 83 transitions, 716 flow [2023-11-29 02:43:22,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=677, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=716, PETRI_PLACES=72, PETRI_TRANSITIONS=83} [2023-11-29 02:43:22,329 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 45 predicate places. [2023-11-29 02:43:22,329 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 83 transitions, 716 flow [2023-11-29 02:43:22,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 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) [2023-11-29 02:43:22,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:43:22,329 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:43:22,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-29 02:43:22,329 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:43:22,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:43:22,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1419093412, now seen corresponding path program 5 times [2023-11-29 02:43:22,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:43:22,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146165429] [2023-11-29 02:43:22,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:43:22,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:43:22,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:43:22,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:43:22,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:43:22,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146165429] [2023-11-29 02:43:22,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146165429] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:43:22,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:43:22,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 02:43:22,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010522613] [2023-11-29 02:43:22,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:43:22,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 02:43:22,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:43:22,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 02:43:22,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-29 02:43:22,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2023-11-29 02:43:22,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 83 transitions, 716 flow. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 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) [2023-11-29 02:43:22,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:43:22,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2023-11-29 02:43:22,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:43:22,663 INFO L124 PetriNetUnfolderBase]: 517/900 cut-off events. [2023-11-29 02:43:22,663 INFO L125 PetriNetUnfolderBase]: For 2855/2855 co-relation queries the response was YES. [2023-11-29 02:43:22,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3778 conditions, 900 events. 517/900 cut-off events. For 2855/2855 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 4085 event pairs, 145 based on Foata normal form. 10/908 useless extension candidates. Maximal degree in co-relation 3232. Up to 482 conditions per place. [2023-11-29 02:43:22,672 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 92 selfloop transitions, 30 changer transitions 0/123 dead transitions. [2023-11-29 02:43:22,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 123 transitions, 1191 flow [2023-11-29 02:43:22,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 02:43:22,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 02:43:22,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 76 transitions. [2023-11-29 02:43:22,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4691358024691358 [2023-11-29 02:43:22,674 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 76 transitions. [2023-11-29 02:43:22,674 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 76 transitions. [2023-11-29 02:43:22,674 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:43:22,674 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 76 transitions. [2023-11-29 02:43:22,674 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 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) [2023-11-29 02:43:22,675 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 27.0) internal successors, (189), 7 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:43:22,675 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 27.0) internal successors, (189), 7 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:43:22,675 INFO L175 Difference]: Start difference. First operand has 72 places, 83 transitions, 716 flow. Second operand 6 states and 76 transitions. [2023-11-29 02:43:22,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 123 transitions, 1191 flow [2023-11-29 02:43:22,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 123 transitions, 1135 flow, removed 5 selfloop flow, removed 4 redundant places. [2023-11-29 02:43:22,686 INFO L231 Difference]: Finished difference. Result has 73 places, 87 transitions, 781 flow [2023-11-29 02:43:22,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=666, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=781, PETRI_PLACES=73, PETRI_TRANSITIONS=87} [2023-11-29 02:43:22,687 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 46 predicate places. [2023-11-29 02:43:22,687 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 87 transitions, 781 flow [2023-11-29 02:43:22,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 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) [2023-11-29 02:43:22,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:43:22,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:43:22,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-29 02:43:22,688 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:43:22,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:43:22,688 INFO L85 PathProgramCache]: Analyzing trace with hash 105179288, now seen corresponding path program 6 times [2023-11-29 02:43:22,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:43:22,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578285756] [2023-11-29 02:43:22,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:43:22,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:43:22,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:43:22,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:43:22,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:43:22,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578285756] [2023-11-29 02:43:22,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578285756] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:43:22,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:43:22,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 02:43:22,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091209657] [2023-11-29 02:43:22,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:43:22,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 02:43:22,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:43:22,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 02:43:22,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 02:43:22,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2023-11-29 02:43:22,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 87 transitions, 781 flow. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 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) [2023-11-29 02:43:22,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:43:22,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2023-11-29 02:43:22,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:43:22,995 INFO L124 PetriNetUnfolderBase]: 434/792 cut-off events. [2023-11-29 02:43:22,995 INFO L125 PetriNetUnfolderBase]: For 2866/2873 co-relation queries the response was YES. [2023-11-29 02:43:22,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3361 conditions, 792 events. 434/792 cut-off events. For 2866/2873 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3795 event pairs, 131 based on Foata normal form. 2/783 useless extension candidates. Maximal degree in co-relation 2907. Up to 406 conditions per place. [2023-11-29 02:43:23,004 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 71 selfloop transitions, 29 changer transitions 2/108 dead transitions. [2023-11-29 02:43:23,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 108 transitions, 1130 flow [2023-11-29 02:43:23,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 02:43:23,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 02:43:23,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 66 transitions. [2023-11-29 02:43:23,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4888888888888889 [2023-11-29 02:43:23,005 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 66 transitions. [2023-11-29 02:43:23,005 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 66 transitions. [2023-11-29 02:43:23,006 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:43:23,006 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 66 transitions. [2023-11-29 02:43:23,006 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 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) [2023-11-29 02:43:23,007 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 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) [2023-11-29 02:43:23,007 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 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) [2023-11-29 02:43:23,007 INFO L175 Difference]: Start difference. First operand has 73 places, 87 transitions, 781 flow. Second operand 5 states and 66 transitions. [2023-11-29 02:43:23,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 108 transitions, 1130 flow [2023-11-29 02:43:23,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 108 transitions, 1067 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-11-29 02:43:23,019 INFO L231 Difference]: Finished difference. Result has 75 places, 92 transitions, 864 flow [2023-11-29 02:43:23,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=724, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=864, PETRI_PLACES=75, PETRI_TRANSITIONS=92} [2023-11-29 02:43:23,019 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 48 predicate places. [2023-11-29 02:43:23,019 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 92 transitions, 864 flow [2023-11-29 02:43:23,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 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) [2023-11-29 02:43:23,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:43:23,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:43:23,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-29 02:43:23,020 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:43:23,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:43:23,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1754788501, now seen corresponding path program 5 times [2023-11-29 02:43:23,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:43:23,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142979581] [2023-11-29 02:43:23,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:43:23,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:43:23,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:43:23,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:43:23,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:43:23,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142979581] [2023-11-29 02:43:23,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142979581] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:43:23,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:43:23,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 02:43:23,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649169572] [2023-11-29 02:43:23,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:43:23,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 02:43:23,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:43:23,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 02:43:23,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-29 02:43:23,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2023-11-29 02:43:23,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 92 transitions, 864 flow. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 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) [2023-11-29 02:43:23,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:43:23,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2023-11-29 02:43:23,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:43:23,352 INFO L124 PetriNetUnfolderBase]: 542/951 cut-off events. [2023-11-29 02:43:23,352 INFO L125 PetriNetUnfolderBase]: For 3432/3432 co-relation queries the response was YES. [2023-11-29 02:43:23,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3944 conditions, 951 events. 542/951 cut-off events. For 3432/3432 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 4418 event pairs, 160 based on Foata normal form. 16/965 useless extension candidates. Maximal degree in co-relation 3496. Up to 453 conditions per place. [2023-11-29 02:43:23,361 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 82 selfloop transitions, 35 changer transitions 1/119 dead transitions. [2023-11-29 02:43:23,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 119 transitions, 1222 flow [2023-11-29 02:43:23,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 02:43:23,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 02:43:23,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 77 transitions. [2023-11-29 02:43:23,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47530864197530864 [2023-11-29 02:43:23,363 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 77 transitions. [2023-11-29 02:43:23,363 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 77 transitions. [2023-11-29 02:43:23,363 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:43:23,363 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 77 transitions. [2023-11-29 02:43:23,364 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 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) [2023-11-29 02:43:23,364 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 27.0) internal successors, (189), 7 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:43:23,364 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 27.0) internal successors, (189), 7 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:43:23,364 INFO L175 Difference]: Start difference. First operand has 75 places, 92 transitions, 864 flow. Second operand 6 states and 77 transitions. [2023-11-29 02:43:23,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 119 transitions, 1222 flow [2023-11-29 02:43:23,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 119 transitions, 1176 flow, removed 12 selfloop flow, removed 2 redundant places. [2023-11-29 02:43:23,378 INFO L231 Difference]: Finished difference. Result has 79 places, 95 transitions, 924 flow [2023-11-29 02:43:23,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=788, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=924, PETRI_PLACES=79, PETRI_TRANSITIONS=95} [2023-11-29 02:43:23,379 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 52 predicate places. [2023-11-29 02:43:23,379 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 95 transitions, 924 flow [2023-11-29 02:43:23,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 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) [2023-11-29 02:43:23,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:43:23,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:43:23,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-29 02:43:23,380 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:43:23,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:43:23,380 INFO L85 PathProgramCache]: Analyzing trace with hash -107704447, now seen corresponding path program 6 times [2023-11-29 02:43:23,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:43:23,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794994867] [2023-11-29 02:43:23,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:43:23,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:43:23,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:43:23,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:43:23,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:43:23,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794994867] [2023-11-29 02:43:23,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794994867] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:43:23,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:43:23,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 02:43:23,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208864319] [2023-11-29 02:43:23,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:43:23,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 02:43:23,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:43:23,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 02:43:23,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 02:43:23,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2023-11-29 02:43:23,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 95 transitions, 924 flow. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 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) [2023-11-29 02:43:23,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:43:23,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2023-11-29 02:43:23,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:43:23,663 INFO L124 PetriNetUnfolderBase]: 458/818 cut-off events. [2023-11-29 02:43:23,663 INFO L125 PetriNetUnfolderBase]: For 3496/3521 co-relation queries the response was YES. [2023-11-29 02:43:23,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3478 conditions, 818 events. 458/818 cut-off events. For 3496/3521 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 3871 event pairs, 156 based on Foata normal form. 4/807 useless extension candidates. Maximal degree in co-relation 3324. Up to 446 conditions per place. [2023-11-29 02:43:23,670 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 62 selfloop transitions, 27 changer transitions 5/112 dead transitions. [2023-11-29 02:43:23,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 112 transitions, 1184 flow [2023-11-29 02:43:23,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 02:43:23,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 02:43:23,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 65 transitions. [2023-11-29 02:43:23,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2023-11-29 02:43:23,671 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 65 transitions. [2023-11-29 02:43:23,671 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 65 transitions. [2023-11-29 02:43:23,671 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:43:23,671 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 65 transitions. [2023-11-29 02:43:23,672 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 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) [2023-11-29 02:43:23,672 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 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) [2023-11-29 02:43:23,672 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 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) [2023-11-29 02:43:23,672 INFO L175 Difference]: Start difference. First operand has 79 places, 95 transitions, 924 flow. Second operand 5 states and 65 transitions. [2023-11-29 02:43:23,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 112 transitions, 1184 flow [2023-11-29 02:43:23,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 112 transitions, 1098 flow, removed 3 selfloop flow, removed 7 redundant places. [2023-11-29 02:43:23,683 INFO L231 Difference]: Finished difference. Result has 77 places, 94 transitions, 882 flow [2023-11-29 02:43:23,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=840, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=882, PETRI_PLACES=77, PETRI_TRANSITIONS=94} [2023-11-29 02:43:23,684 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 50 predicate places. [2023-11-29 02:43:23,684 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 94 transitions, 882 flow [2023-11-29 02:43:23,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 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) [2023-11-29 02:43:23,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:43:23,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:43:23,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-29 02:43:23,685 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:43:23,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:43:23,685 INFO L85 PathProgramCache]: Analyzing trace with hash -128729452, now seen corresponding path program 7 times [2023-11-29 02:43:23,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:43:23,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086563044] [2023-11-29 02:43:23,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:43:23,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:43:23,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:43:23,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:43:23,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:43:23,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086563044] [2023-11-29 02:43:23,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086563044] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:43:23,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:43:23,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 02:43:23,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655015781] [2023-11-29 02:43:23,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:43:23,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 02:43:23,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:43:23,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 02:43:23,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-29 02:43:23,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2023-11-29 02:43:23,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 94 transitions, 882 flow. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 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) [2023-11-29 02:43:23,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:43:23,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2023-11-29 02:43:23,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:43:23,954 INFO L124 PetriNetUnfolderBase]: 499/853 cut-off events. [2023-11-29 02:43:23,955 INFO L125 PetriNetUnfolderBase]: For 3225/3225 co-relation queries the response was YES. [2023-11-29 02:43:23,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3551 conditions, 853 events. 499/853 cut-off events. For 3225/3225 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 3766 event pairs, 148 based on Foata normal form. 10/861 useless extension candidates. Maximal degree in co-relation 2970. Up to 470 conditions per place. [2023-11-29 02:43:23,961 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 84 selfloop transitions, 31 changer transitions 1/117 dead transitions. [2023-11-29 02:43:23,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 117 transitions, 1200 flow [2023-11-29 02:43:23,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 02:43:23,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 02:43:23,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 73 transitions. [2023-11-29 02:43:23,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4506172839506173 [2023-11-29 02:43:23,962 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 73 transitions. [2023-11-29 02:43:23,962 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 73 transitions. [2023-11-29 02:43:23,962 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:43:23,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 73 transitions. [2023-11-29 02:43:23,963 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 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) [2023-11-29 02:43:23,963 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 27.0) internal successors, (189), 7 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:43:23,963 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 27.0) internal successors, (189), 7 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:43:23,963 INFO L175 Difference]: Start difference. First operand has 77 places, 94 transitions, 882 flow. Second operand 6 states and 73 transitions. [2023-11-29 02:43:23,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 117 transitions, 1200 flow [2023-11-29 02:43:23,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 117 transitions, 1138 flow, removed 3 selfloop flow, removed 5 redundant places. [2023-11-29 02:43:23,972 INFO L231 Difference]: Finished difference. Result has 76 places, 94 transitions, 882 flow [2023-11-29 02:43:23,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=805, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=882, PETRI_PLACES=76, PETRI_TRANSITIONS=94} [2023-11-29 02:43:23,972 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 49 predicate places. [2023-11-29 02:43:23,973 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 94 transitions, 882 flow [2023-11-29 02:43:23,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 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) [2023-11-29 02:43:23,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:43:23,973 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] [2023-11-29 02:43:23,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-29 02:43:23,973 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:43:23,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:43:23,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1104857327, now seen corresponding path program 1 times [2023-11-29 02:43:23,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:43:23,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419107161] [2023-11-29 02:43:23,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:43:23,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:43:23,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:43:24,079 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 02:43:24,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:43:24,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419107161] [2023-11-29 02:43:24,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419107161] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:43:24,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:43:24,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 02:43:24,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772391217] [2023-11-29 02:43:24,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:43:24,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:43:24,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:43:24,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:43:24,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:43:24,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2023-11-29 02:43:24,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 94 transitions, 882 flow. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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) [2023-11-29 02:43:24,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:43:24,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2023-11-29 02:43:24,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:43:24,239 INFO L124 PetriNetUnfolderBase]: 377/737 cut-off events. [2023-11-29 02:43:24,239 INFO L125 PetriNetUnfolderBase]: For 3316/3353 co-relation queries the response was YES. [2023-11-29 02:43:24,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3082 conditions, 737 events. 377/737 cut-off events. For 3316/3353 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3690 event pairs, 169 based on Foata normal form. 23/744 useless extension candidates. Maximal degree in co-relation 2612. Up to 583 conditions per place. [2023-11-29 02:43:24,250 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 67 selfloop transitions, 2 changer transitions 15/110 dead transitions. [2023-11-29 02:43:24,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 110 transitions, 1164 flow [2023-11-29 02:43:24,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 02:43:24,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 02:43:24,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 60 transitions. [2023-11-29 02:43:24,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2023-11-29 02:43:24,251 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 60 transitions. [2023-11-29 02:43:24,251 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 60 transitions. [2023-11-29 02:43:24,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:43:24,251 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 60 transitions. [2023-11-29 02:43:24,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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) [2023-11-29 02:43:24,254 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 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) [2023-11-29 02:43:24,254 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 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) [2023-11-29 02:43:24,254 INFO L175 Difference]: Start difference. First operand has 76 places, 94 transitions, 882 flow. Second operand 5 states and 60 transitions. [2023-11-29 02:43:24,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 110 transitions, 1164 flow [2023-11-29 02:43:24,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 110 transitions, 1094 flow, removed 5 selfloop flow, removed 4 redundant places. [2023-11-29 02:43:24,268 INFO L231 Difference]: Finished difference. Result has 78 places, 95 transitions, 843 flow [2023-11-29 02:43:24,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=823, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=843, PETRI_PLACES=78, PETRI_TRANSITIONS=95} [2023-11-29 02:43:24,269 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 51 predicate places. [2023-11-29 02:43:24,270 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 95 transitions, 843 flow [2023-11-29 02:43:24,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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) [2023-11-29 02:43:24,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:43:24,272 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] [2023-11-29 02:43:24,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-29 02:43:24,273 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:43:24,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:43:24,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1186944286, now seen corresponding path program 1 times [2023-11-29 02:43:24,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:43:24,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122071991] [2023-11-29 02:43:24,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:43:24,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:43:24,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:43:24,396 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 02:43:24,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:43:24,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122071991] [2023-11-29 02:43:24,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122071991] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:43:24,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:43:24,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 02:43:24,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095694476] [2023-11-29 02:43:24,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:43:24,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:43:24,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:43:24,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:43:24,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:43:24,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2023-11-29 02:43:24,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 95 transitions, 843 flow. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:43:24,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:43:24,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2023-11-29 02:43:24,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:43:24,570 INFO L124 PetriNetUnfolderBase]: 375/740 cut-off events. [2023-11-29 02:43:24,571 INFO L125 PetriNetUnfolderBase]: For 2698/2747 co-relation queries the response was YES. [2023-11-29 02:43:24,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3019 conditions, 740 events. 375/740 cut-off events. For 2698/2747 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3716 event pairs, 169 based on Foata normal form. 25/756 useless extension candidates. Maximal degree in co-relation 2987. Up to 584 conditions per place. [2023-11-29 02:43:24,576 INFO L140 encePairwiseOnDemand]: 22/27 looper letters, 68 selfloop transitions, 2 changer transitions 11/107 dead transitions. [2023-11-29 02:43:24,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 107 transitions, 1104 flow [2023-11-29 02:43:24,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 02:43:24,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 02:43:24,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 51 transitions. [2023-11-29 02:43:24,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2023-11-29 02:43:24,577 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 51 transitions. [2023-11-29 02:43:24,577 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 51 transitions. [2023-11-29 02:43:24,578 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:43:24,578 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 51 transitions. [2023-11-29 02:43:24,578 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:43:24,578 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 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) [2023-11-29 02:43:24,579 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 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) [2023-11-29 02:43:24,579 INFO L175 Difference]: Start difference. First operand has 78 places, 95 transitions, 843 flow. Second operand 4 states and 51 transitions. [2023-11-29 02:43:24,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 107 transitions, 1104 flow [2023-11-29 02:43:24,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 107 transitions, 1088 flow, removed 7 selfloop flow, removed 3 redundant places. [2023-11-29 02:43:24,590 INFO L231 Difference]: Finished difference. Result has 78 places, 96 transitions, 847 flow [2023-11-29 02:43:24,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=831, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=847, PETRI_PLACES=78, PETRI_TRANSITIONS=96} [2023-11-29 02:43:24,591 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 51 predicate places. [2023-11-29 02:43:24,591 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 96 transitions, 847 flow [2023-11-29 02:43:24,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:43:24,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:43:24,591 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] [2023-11-29 02:43:24,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-29 02:43:24,592 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:43:24,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:43:24,592 INFO L85 PathProgramCache]: Analyzing trace with hash 15225383, now seen corresponding path program 1 times [2023-11-29 02:43:24,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:43:24,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035831271] [2023-11-29 02:43:24,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:43:24,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:43:24,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:43:24,869 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 02:43:24,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:43:24,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035831271] [2023-11-29 02:43:24,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035831271] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:43:24,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310860004] [2023-11-29 02:43:24,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:43:24,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:43:24,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:43:24,871 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:43:24,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 02:43:24,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:43:24,992 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 02:43:24,995 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:43:25,073 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 02:43:25,074 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:43:25,113 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 12 [2023-11-29 02:43:25,171 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 02:43:25,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310860004] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:43:25,172 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:43:25,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2023-11-29 02:43:25,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170805586] [2023-11-29 02:43:25,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:43:25,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 02:43:25,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:43:25,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 02:43:25,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-11-29 02:43:25,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2023-11-29 02:43:25,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 96 transitions, 847 flow. Second operand has 11 states, 11 states have (on average 8.0) internal successors, (88), 11 states have internal predecessors, (88), 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) [2023-11-29 02:43:25,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:43:25,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2023-11-29 02:43:25,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:43:25,753 INFO L124 PetriNetUnfolderBase]: 1122/2104 cut-off events. [2023-11-29 02:43:25,753 INFO L125 PetriNetUnfolderBase]: For 7102/7237 co-relation queries the response was YES. [2023-11-29 02:43:25,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8289 conditions, 2104 events. 1122/2104 cut-off events. For 7102/7237 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 12817 event pairs, 146 based on Foata normal form. 48/2147 useless extension candidates. Maximal degree in co-relation 6846. Up to 544 conditions per place. [2023-11-29 02:43:25,776 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 229 selfloop transitions, 14 changer transitions 5/274 dead transitions. [2023-11-29 02:43:25,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 274 transitions, 2878 flow [2023-11-29 02:43:25,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 02:43:25,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-29 02:43:25,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 130 transitions. [2023-11-29 02:43:25,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5349794238683128 [2023-11-29 02:43:25,777 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 130 transitions. [2023-11-29 02:43:25,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 130 transitions. [2023-11-29 02:43:25,777 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:43:25,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 130 transitions. [2023-11-29 02:43:25,778 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 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) [2023-11-29 02:43:25,779 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 27.0) internal successors, (270), 10 states have internal predecessors, (270), 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) [2023-11-29 02:43:25,779 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 27.0) internal successors, (270), 10 states have internal predecessors, (270), 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) [2023-11-29 02:43:25,779 INFO L175 Difference]: Start difference. First operand has 78 places, 96 transitions, 847 flow. Second operand 9 states and 130 transitions. [2023-11-29 02:43:25,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 274 transitions, 2878 flow [2023-11-29 02:43:25,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 274 transitions, 2862 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-11-29 02:43:25,801 INFO L231 Difference]: Finished difference. Result has 87 places, 109 transitions, 956 flow [2023-11-29 02:43:25,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=839, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=956, PETRI_PLACES=87, PETRI_TRANSITIONS=109} [2023-11-29 02:43:25,802 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 60 predicate places. [2023-11-29 02:43:25,802 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 109 transitions, 956 flow [2023-11-29 02:43:25,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.0) internal successors, (88), 11 states have internal predecessors, (88), 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) [2023-11-29 02:43:25,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:43:25,803 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] [2023-11-29 02:43:25,808 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 02:43:26,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 02:43:26,003 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:43:26,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:43:26,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1468824017, now seen corresponding path program 2 times [2023-11-29 02:43:26,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:43:26,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355588053] [2023-11-29 02:43:26,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:43:26,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:43:26,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:43:26,245 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 02:43:26,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:43:26,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355588053] [2023-11-29 02:43:26,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355588053] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:43:26,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030484035] [2023-11-29 02:43:26,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:43:26,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:43:26,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:43:26,247 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:43:26,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 02:43:26,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:43:26,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:43:26,367 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 02:43:26,369 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:43:26,446 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 02:43:26,446 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:43:26,466 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 12 [2023-11-29 02:43:26,514 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 02:43:26,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030484035] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:43:26,515 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:43:26,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 11 [2023-11-29 02:43:26,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883610185] [2023-11-29 02:43:26,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:43:26,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 02:43:26,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:43:26,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 02:43:26,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-11-29 02:43:26,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2023-11-29 02:43:26,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 109 transitions, 956 flow. Second operand has 11 states, 11 states have (on average 7.636363636363637) internal successors, (84), 11 states have internal predecessors, (84), 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) [2023-11-29 02:43:26,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:43:26,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2023-11-29 02:43:26,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:43:27,347 INFO L124 PetriNetUnfolderBase]: 2774/5218 cut-off events. [2023-11-29 02:43:27,347 INFO L125 PetriNetUnfolderBase]: For 18896/19112 co-relation queries the response was YES. [2023-11-29 02:43:27,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21612 conditions, 5218 events. 2774/5218 cut-off events. For 18896/19112 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 37350 event pairs, 436 based on Foata normal form. 105/5317 useless extension candidates. Maximal degree in co-relation 16640. Up to 1717 conditions per place. [2023-11-29 02:43:27,389 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 229 selfloop transitions, 23 changer transitions 18/296 dead transitions. [2023-11-29 02:43:27,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 296 transitions, 3134 flow [2023-11-29 02:43:27,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 02:43:27,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-29 02:43:27,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2023-11-29 02:43:27,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5509259259259259 [2023-11-29 02:43:27,391 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 119 transitions. [2023-11-29 02:43:27,391 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 119 transitions. [2023-11-29 02:43:27,391 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:43:27,391 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 119 transitions. [2023-11-29 02:43:27,392 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:43:27,392 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 27.0) internal successors, (243), 9 states have internal predecessors, (243), 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) [2023-11-29 02:43:27,392 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 27.0) internal successors, (243), 9 states have internal predecessors, (243), 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) [2023-11-29 02:43:27,393 INFO L175 Difference]: Start difference. First operand has 87 places, 109 transitions, 956 flow. Second operand 8 states and 119 transitions. [2023-11-29 02:43:27,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 296 transitions, 3134 flow [2023-11-29 02:43:27,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 296 transitions, 3086 flow, removed 23 selfloop flow, removed 1 redundant places. [2023-11-29 02:43:27,443 INFO L231 Difference]: Finished difference. Result has 98 places, 127 transitions, 1144 flow [2023-11-29 02:43:27,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=936, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1144, PETRI_PLACES=98, PETRI_TRANSITIONS=127} [2023-11-29 02:43:27,443 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 71 predicate places. [2023-11-29 02:43:27,443 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 127 transitions, 1144 flow [2023-11-29 02:43:27,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.636363636363637) internal successors, (84), 11 states have internal predecessors, (84), 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) [2023-11-29 02:43:27,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:43:27,444 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:43:27,449 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 02:43:27,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 02:43:27,645 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:43:27,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:43:27,645 INFO L85 PathProgramCache]: Analyzing trace with hash -985221754, now seen corresponding path program 3 times [2023-11-29 02:43:27,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:43:27,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533993397] [2023-11-29 02:43:27,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:43:27,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:43:27,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:43:27,774 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 02:43:27,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:43:27,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533993397] [2023-11-29 02:43:27,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533993397] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:43:27,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861324459] [2023-11-29 02:43:27,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 02:43:27,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:43:27,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:43:27,776 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:43:27,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 02:43:27,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 02:43:27,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:43:27,928 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 02:43:27,930 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:43:28,018 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 02:43:28,019 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:43:28,085 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 02:43:28,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861324459] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:43:28,085 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:43:28,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-29 02:43:28,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483225488] [2023-11-29 02:43:28,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:43:28,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 02:43:28,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:43:28,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 02:43:28,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-11-29 02:43:28,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2023-11-29 02:43:28,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 127 transitions, 1144 flow. Second operand has 15 states, 15 states have (on average 6.666666666666667) internal successors, (100), 15 states have internal predecessors, (100), 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) [2023-11-29 02:43:28,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:43:28,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2023-11-29 02:43:28,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:43:29,763 INFO L124 PetriNetUnfolderBase]: 5060/8499 cut-off events. [2023-11-29 02:43:29,763 INFO L125 PetriNetUnfolderBase]: For 25109/25109 co-relation queries the response was YES. [2023-11-29 02:43:29,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35057 conditions, 8499 events. 5060/8499 cut-off events. For 25109/25109 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 55954 event pairs, 224 based on Foata normal form. 260/8759 useless extension candidates. Maximal degree in co-relation 29567. Up to 1535 conditions per place. [2023-11-29 02:43:29,823 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 380 selfloop transitions, 123 changer transitions 8/512 dead transitions. [2023-11-29 02:43:29,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 512 transitions, 4893 flow [2023-11-29 02:43:29,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-29 02:43:29,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-29 02:43:29,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 294 transitions. [2023-11-29 02:43:29,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37547892720306514 [2023-11-29 02:43:29,826 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 294 transitions. [2023-11-29 02:43:29,826 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 294 transitions. [2023-11-29 02:43:29,827 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:43:29,827 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 294 transitions. [2023-11-29 02:43:29,828 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 10.137931034482758) internal successors, (294), 29 states have internal predecessors, (294), 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) [2023-11-29 02:43:29,830 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 27.0) internal successors, (810), 30 states have internal predecessors, (810), 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) [2023-11-29 02:43:29,830 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 27.0) internal successors, (810), 30 states have internal predecessors, (810), 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) [2023-11-29 02:43:29,830 INFO L175 Difference]: Start difference. First operand has 98 places, 127 transitions, 1144 flow. Second operand 29 states and 294 transitions. [2023-11-29 02:43:29,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 512 transitions, 4893 flow [2023-11-29 02:43:29,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 512 transitions, 4842 flow, removed 24 selfloop flow, removed 1 redundant places. [2023-11-29 02:43:29,905 INFO L231 Difference]: Finished difference. Result has 145 places, 205 transitions, 2211 flow [2023-11-29 02:43:29,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=1129, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=2211, PETRI_PLACES=145, PETRI_TRANSITIONS=205} [2023-11-29 02:43:29,906 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 118 predicate places. [2023-11-29 02:43:29,906 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 205 transitions, 2211 flow [2023-11-29 02:43:29,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.666666666666667) internal successors, (100), 15 states have internal predecessors, (100), 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) [2023-11-29 02:43:29,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:43:29,906 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:43:29,912 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 02:43:30,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:43:30,112 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:43:30,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:43:30,112 INFO L85 PathProgramCache]: Analyzing trace with hash -234236438, now seen corresponding path program 4 times [2023-11-29 02:43:30,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:43:30,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332714814] [2023-11-29 02:43:30,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:43:30,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:43:30,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:43:30,257 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 02:43:30,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:43:30,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332714814] [2023-11-29 02:43:30,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332714814] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:43:30,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536944410] [2023-11-29 02:43:30,258 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 02:43:30,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:43:30,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:43:30,259 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:43:30,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 02:43:30,371 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 02:43:30,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:43:30,372 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 02:43:30,373 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:43:30,434 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 02:43:30,434 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:43:30,478 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 02:43:30,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536944410] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:43:30,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:43:30,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-11-29 02:43:30,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093313380] [2023-11-29 02:43:30,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:43:30,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 02:43:30,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:43:30,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 02:43:30,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-11-29 02:43:30,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2023-11-29 02:43:30,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 205 transitions, 2211 flow. Second operand has 11 states, 11 states have (on average 7.0) internal successors, (77), 11 states have internal predecessors, (77), 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) [2023-11-29 02:43:30,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:43:30,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2023-11-29 02:43:30,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:43:32,721 INFO L124 PetriNetUnfolderBase]: 7098/11920 cut-off events. [2023-11-29 02:43:32,722 INFO L125 PetriNetUnfolderBase]: For 80781/80781 co-relation queries the response was YES. [2023-11-29 02:43:32,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61884 conditions, 11920 events. 7098/11920 cut-off events. For 80781/80781 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 82050 event pairs, 357 based on Foata normal form. 88/12008 useless extension candidates. Maximal degree in co-relation 60013. Up to 2360 conditions per place. [2023-11-29 02:43:32,801 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 276 selfloop transitions, 178 changer transitions 9/464 dead transitions. [2023-11-29 02:43:32,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 464 transitions, 5339 flow [2023-11-29 02:43:32,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 02:43:32,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-29 02:43:32,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 158 transitions. [2023-11-29 02:43:32,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39012345679012345 [2023-11-29 02:43:32,803 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 158 transitions. [2023-11-29 02:43:32,803 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 158 transitions. [2023-11-29 02:43:32,803 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:43:32,803 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 158 transitions. [2023-11-29 02:43:32,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 10.533333333333333) internal successors, (158), 15 states have internal predecessors, (158), 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) [2023-11-29 02:43:32,804 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 27.0) internal successors, (432), 16 states have internal predecessors, (432), 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) [2023-11-29 02:43:32,804 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 27.0) internal successors, (432), 16 states have internal predecessors, (432), 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) [2023-11-29 02:43:32,804 INFO L175 Difference]: Start difference. First operand has 145 places, 205 transitions, 2211 flow. Second operand 15 states and 158 transitions. [2023-11-29 02:43:32,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 464 transitions, 5339 flow [2023-11-29 02:43:33,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 464 transitions, 5059 flow, removed 125 selfloop flow, removed 4 redundant places. [2023-11-29 02:43:33,308 INFO L231 Difference]: Finished difference. Result has 162 places, 285 transitions, 3402 flow [2023-11-29 02:43:33,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=2057, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3402, PETRI_PLACES=162, PETRI_TRANSITIONS=285} [2023-11-29 02:43:33,309 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 135 predicate places. [2023-11-29 02:43:33,309 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 285 transitions, 3402 flow [2023-11-29 02:43:33,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.0) internal successors, (77), 11 states have internal predecessors, (77), 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) [2023-11-29 02:43:33,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:43:33,309 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:43:33,314 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 02:43:33,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:43:33,510 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:43:33,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:43:33,510 INFO L85 PathProgramCache]: Analyzing trace with hash -469377738, now seen corresponding path program 5 times [2023-11-29 02:43:33,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:43:33,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891316807] [2023-11-29 02:43:33,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:43:33,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:43:33,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:43:33,623 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 02:43:33,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:43:33,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891316807] [2023-11-29 02:43:33,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891316807] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:43:33,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894430268] [2023-11-29 02:43:33,623 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 02:43:33,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:43:33,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:43:33,624 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:43:33,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 02:43:33,760 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-29 02:43:33,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:43:33,761 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 02:43:33,763 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:43:33,818 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 02:43:33,818 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:43:33,866 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 02:43:33,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894430268] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:43:33,866 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:43:33,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-11-29 02:43:33,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317360988] [2023-11-29 02:43:33,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:43:33,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 02:43:33,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:43:33,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 02:43:33,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-11-29 02:43:33,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2023-11-29 02:43:33,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 285 transitions, 3402 flow. Second operand has 13 states, 13 states have (on average 6.461538461538462) internal successors, (84), 13 states have internal predecessors, (84), 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) [2023-11-29 02:43:33,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:43:33,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2023-11-29 02:43:33,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:43:37,286 INFO L124 PetriNetUnfolderBase]: 9517/15961 cut-off events. [2023-11-29 02:43:37,287 INFO L125 PetriNetUnfolderBase]: For 146153/146153 co-relation queries the response was YES. [2023-11-29 02:43:37,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89037 conditions, 15961 events. 9517/15961 cut-off events. For 146153/146153 co-relation queries the response was YES. Maximal size of possible extension queue 580. Compared 113244 event pairs, 427 based on Foata normal form. 178/16139 useless extension candidates. Maximal degree in co-relation 83382. Up to 3566 conditions per place. [2023-11-29 02:43:37,400 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 308 selfloop transitions, 245 changer transitions 6/560 dead transitions. [2023-11-29 02:43:37,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 560 transitions, 6979 flow [2023-11-29 02:43:37,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 02:43:37,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-29 02:43:37,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 173 transitions. [2023-11-29 02:43:37,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40046296296296297 [2023-11-29 02:43:37,402 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 173 transitions. [2023-11-29 02:43:37,402 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 173 transitions. [2023-11-29 02:43:37,402 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:43:37,402 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 173 transitions. [2023-11-29 02:43:37,403 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 10.8125) internal successors, (173), 16 states have internal predecessors, (173), 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) [2023-11-29 02:43:37,404 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 27.0) internal successors, (459), 17 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:43:37,404 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 27.0) internal successors, (459), 17 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:43:37,404 INFO L175 Difference]: Start difference. First operand has 162 places, 285 transitions, 3402 flow. Second operand 16 states and 173 transitions. [2023-11-29 02:43:37,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 560 transitions, 6979 flow [2023-11-29 02:43:38,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 560 transitions, 6817 flow, removed 81 selfloop flow, removed 0 redundant places. [2023-11-29 02:43:38,932 INFO L231 Difference]: Finished difference. Result has 187 places, 364 transitions, 5092 flow [2023-11-29 02:43:38,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=3308, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=5092, PETRI_PLACES=187, PETRI_TRANSITIONS=364} [2023-11-29 02:43:38,933 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 160 predicate places. [2023-11-29 02:43:38,933 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 364 transitions, 5092 flow [2023-11-29 02:43:38,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.461538461538462) internal successors, (84), 13 states have internal predecessors, (84), 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) [2023-11-29 02:43:38,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:43:38,933 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:43:38,938 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 02:43:39,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-29 02:43:39,134 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:43:39,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:43:39,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1015738034, now seen corresponding path program 6 times [2023-11-29 02:43:39,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:43:39,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424740956] [2023-11-29 02:43:39,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:43:39,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:43:39,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:43:39,270 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 02:43:39,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:43:39,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424740956] [2023-11-29 02:43:39,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424740956] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:43:39,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341866681] [2023-11-29 02:43:39,271 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 02:43:39,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:43:39,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:43:39,272 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:43:39,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 02:43:39,408 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-29 02:43:39,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:43:39,410 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 02:43:39,412 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:43:39,495 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 02:43:39,496 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:43:39,554 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 02:43:39,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341866681] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:43:39,554 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:43:39,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-11-29 02:43:39,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093757785] [2023-11-29 02:43:39,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:43:39,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 02:43:39,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:43:39,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 02:43:39,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-11-29 02:43:39,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2023-11-29 02:43:39,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 364 transitions, 5092 flow. Second operand has 12 states, 12 states have (on average 6.666666666666667) internal successors, (80), 12 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) [2023-11-29 02:43:39,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:43:39,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2023-11-29 02:43:39,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:43:44,157 INFO L124 PetriNetUnfolderBase]: 11664/19576 cut-off events. [2023-11-29 02:43:44,157 INFO L125 PetriNetUnfolderBase]: For 258739/258739 co-relation queries the response was YES. [2023-11-29 02:43:44,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122931 conditions, 19576 events. 11664/19576 cut-off events. For 258739/258739 co-relation queries the response was YES. Maximal size of possible extension queue 699. Compared 143758 event pairs, 563 based on Foata normal form. 136/19712 useless extension candidates. Maximal degree in co-relation 120057. Up to 3254 conditions per place. [2023-11-29 02:43:44,497 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 433 selfloop transitions, 321 changer transitions 4/759 dead transitions. [2023-11-29 02:43:44,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 759 transitions, 10474 flow [2023-11-29 02:43:44,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-29 02:43:44,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-29 02:43:44,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 264 transitions. [2023-11-29 02:43:44,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37606837606837606 [2023-11-29 02:43:44,500 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 264 transitions. [2023-11-29 02:43:44,500 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 264 transitions. [2023-11-29 02:43:44,500 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:43:44,500 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 264 transitions. [2023-11-29 02:43:44,502 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 10.153846153846153) internal successors, (264), 26 states have internal predecessors, (264), 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) [2023-11-29 02:43:44,503 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 27.0) internal successors, (729), 27 states have internal predecessors, (729), 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) [2023-11-29 02:43:44,504 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 27.0) internal successors, (729), 27 states have internal predecessors, (729), 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) [2023-11-29 02:43:44,504 INFO L175 Difference]: Start difference. First operand has 187 places, 364 transitions, 5092 flow. Second operand 26 states and 264 transitions. [2023-11-29 02:43:44,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 759 transitions, 10474 flow [2023-11-29 02:43:48,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 759 transitions, 10353 flow, removed 27 selfloop flow, removed 3 redundant places. [2023-11-29 02:43:48,301 INFO L231 Difference]: Finished difference. Result has 223 places, 450 transitions, 7511 flow [2023-11-29 02:43:48,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=4979, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=240, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=7511, PETRI_PLACES=223, PETRI_TRANSITIONS=450} [2023-11-29 02:43:48,302 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 196 predicate places. [2023-11-29 02:43:48,302 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 450 transitions, 7511 flow [2023-11-29 02:43:48,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.666666666666667) internal successors, (80), 12 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) [2023-11-29 02:43:48,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:43:48,303 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:43:48,308 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 02:43:48,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:43:48,503 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:43:48,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:43:48,503 INFO L85 PathProgramCache]: Analyzing trace with hash -787515612, now seen corresponding path program 7 times [2023-11-29 02:43:48,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:43:48,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106071955] [2023-11-29 02:43:48,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:43:48,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:43:48,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:43:48,616 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 02:43:48,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:43:48,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106071955] [2023-11-29 02:43:48,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106071955] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:43:48,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362129506] [2023-11-29 02:43:48,617 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 02:43:48,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:43:48,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:43:48,618 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:43:48,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 02:43:48,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:43:48,754 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 02:43:48,756 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:43:48,809 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 02:43:48,809 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:43:48,846 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 02:43:48,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362129506] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:43:48,847 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:43:48,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-11-29 02:43:48,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847173642] [2023-11-29 02:43:48,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:43:48,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 02:43:48,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:43:48,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 02:43:48,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-29 02:43:48,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2023-11-29 02:43:48,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 450 transitions, 7511 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 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) [2023-11-29 02:43:48,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:43:48,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2023-11-29 02:43:48,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:43:53,915 INFO L124 PetriNetUnfolderBase]: 11697/19675 cut-off events. [2023-11-29 02:43:53,915 INFO L125 PetriNetUnfolderBase]: For 384992/384992 co-relation queries the response was YES. [2023-11-29 02:43:54,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142609 conditions, 19675 events. 11697/19675 cut-off events. For 384992/384992 co-relation queries the response was YES. Maximal size of possible extension queue 710. Compared 145899 event pairs, 1484 based on Foata normal form. 34/19709 useless extension candidates. Maximal degree in co-relation 139539. Up to 6435 conditions per place. [2023-11-29 02:43:54,203 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 438 selfloop transitions, 209 changer transitions 9/657 dead transitions. [2023-11-29 02:43:54,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 657 transitions, 10803 flow [2023-11-29 02:43:54,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 02:43:54,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-29 02:43:54,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 147 transitions. [2023-11-29 02:43:54,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4188034188034188 [2023-11-29 02:43:54,205 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 147 transitions. [2023-11-29 02:43:54,205 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 147 transitions. [2023-11-29 02:43:54,205 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:43:54,205 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 147 transitions. [2023-11-29 02:43:54,206 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 11.307692307692308) internal successors, (147), 13 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) [2023-11-29 02:43:54,206 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 27.0) internal successors, (378), 14 states have internal predecessors, (378), 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) [2023-11-29 02:43:54,206 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 27.0) internal successors, (378), 14 states have internal predecessors, (378), 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) [2023-11-29 02:43:54,207 INFO L175 Difference]: Start difference. First operand has 223 places, 450 transitions, 7511 flow. Second operand 13 states and 147 transitions. [2023-11-29 02:43:54,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 657 transitions, 10803 flow [2023-11-29 02:44:01,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 657 transitions, 10274 flow, removed 199 selfloop flow, removed 10 redundant places. [2023-11-29 02:44:01,969 INFO L231 Difference]: Finished difference. Result has 227 places, 449 transitions, 7403 flow [2023-11-29 02:44:01,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=6982, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7403, PETRI_PLACES=227, PETRI_TRANSITIONS=449} [2023-11-29 02:44:01,970 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 200 predicate places. [2023-11-29 02:44:01,970 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 449 transitions, 7403 flow [2023-11-29 02:44:01,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 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) [2023-11-29 02:44:01,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:44:01,970 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:44:01,974 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 02:44:02,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:44:02,171 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:44:02,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:44:02,171 INFO L85 PathProgramCache]: Analyzing trace with hash 62821814, now seen corresponding path program 8 times [2023-11-29 02:44:02,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:44:02,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537843687] [2023-11-29 02:44:02,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:44:02,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:44:02,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:44:02,258 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 02:44:02,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:44:02,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537843687] [2023-11-29 02:44:02,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537843687] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:44:02,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893426107] [2023-11-29 02:44:02,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:44:02,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:44:02,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:44:02,260 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:44:02,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 02:44:02,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:44:02,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:44:02,400 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 02:44:02,402 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:44:02,470 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 02:44:02,471 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:44:02,516 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 02:44:02,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893426107] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:44:02,516 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:44:02,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-11-29 02:44:02,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237494187] [2023-11-29 02:44:02,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:44:02,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 02:44:02,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:44:02,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 02:44:02,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2023-11-29 02:44:02,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2023-11-29 02:44:02,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 449 transitions, 7403 flow. Second operand has 13 states, 13 states have (on average 6.461538461538462) internal successors, (84), 13 states have internal predecessors, (84), 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) [2023-11-29 02:44:02,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:44:02,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2023-11-29 02:44:02,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:44:08,666 INFO L124 PetriNetUnfolderBase]: 13363/22301 cut-off events. [2023-11-29 02:44:08,666 INFO L125 PetriNetUnfolderBase]: For 481483/481483 co-relation queries the response was YES. [2023-11-29 02:44:08,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162752 conditions, 22301 events. 13363/22301 cut-off events. For 481483/481483 co-relation queries the response was YES. Maximal size of possible extension queue 831. Compared 166344 event pairs, 874 based on Foata normal form. 122/22423 useless extension candidates. Maximal degree in co-relation 162130. Up to 4442 conditions per place. [2023-11-29 02:44:08,950 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 436 selfloop transitions, 399 changer transitions 4/840 dead transitions. [2023-11-29 02:44:08,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 840 transitions, 13431 flow [2023-11-29 02:44:08,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-29 02:44:08,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-29 02:44:08,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 258 transitions. [2023-11-29 02:44:08,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36752136752136755 [2023-11-29 02:44:08,952 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 258 transitions. [2023-11-29 02:44:08,952 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 258 transitions. [2023-11-29 02:44:08,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:44:08,952 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 258 transitions. [2023-11-29 02:44:08,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 9.923076923076923) internal successors, (258), 26 states have internal predecessors, (258), 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) [2023-11-29 02:44:08,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 27.0) internal successors, (729), 27 states have internal predecessors, (729), 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) [2023-11-29 02:44:08,955 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 27.0) internal successors, (729), 27 states have internal predecessors, (729), 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) [2023-11-29 02:44:08,955 INFO L175 Difference]: Start difference. First operand has 227 places, 449 transitions, 7403 flow. Second operand 26 states and 258 transitions. [2023-11-29 02:44:08,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 840 transitions, 13431 flow [2023-11-29 02:44:16,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 840 transitions, 12891 flow, removed 37 selfloop flow, removed 14 redundant places. [2023-11-29 02:44:16,308 INFO L231 Difference]: Finished difference. Result has 246 places, 538 transitions, 10036 flow [2023-11-29 02:44:16,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=6963, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=321, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=10036, PETRI_PLACES=246, PETRI_TRANSITIONS=538} [2023-11-29 02:44:16,308 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 219 predicate places. [2023-11-29 02:44:16,308 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 538 transitions, 10036 flow [2023-11-29 02:44:16,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.461538461538462) internal successors, (84), 13 states have internal predecessors, (84), 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) [2023-11-29 02:44:16,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:44:16,309 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:44:16,313 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 02:44:16,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:44:16,509 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:44:16,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:44:16,510 INFO L85 PathProgramCache]: Analyzing trace with hash -257296894, now seen corresponding path program 9 times [2023-11-29 02:44:16,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:44:16,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079870583] [2023-11-29 02:44:16,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:44:16,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:44:16,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:44:16,598 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 02:44:16,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:44:16,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079870583] [2023-11-29 02:44:16,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079870583] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:44:16,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707942201] [2023-11-29 02:44:16,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 02:44:16,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:44:16,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:44:16,600 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:44:16,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 02:44:16,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-29 02:44:16,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:44:16,757 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 02:44:16,758 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:44:16,812 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 02:44:16,813 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:44:16,847 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 02:44:16,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707942201] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:44:16,847 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:44:16,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-29 02:44:16,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606946138] [2023-11-29 02:44:16,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:44:16,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 02:44:16,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:44:16,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 02:44:16,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-11-29 02:44:16,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2023-11-29 02:44:16,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 538 transitions, 10036 flow. Second operand has 15 states, 15 states have (on average 5.8) internal successors, (87), 15 states have internal predecessors, (87), 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) [2023-11-29 02:44:16,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:44:16,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2023-11-29 02:44:16,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:44:23,511 INFO L124 PetriNetUnfolderBase]: 14389/23903 cut-off events. [2023-11-29 02:44:23,511 INFO L125 PetriNetUnfolderBase]: For 578436/578436 co-relation queries the response was YES. [2023-11-29 02:44:23,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 189567 conditions, 23903 events. 14389/23903 cut-off events. For 578436/578436 co-relation queries the response was YES. Maximal size of possible extension queue 915. Compared 179521 event pairs, 1698 based on Foata normal form. 46/23949 useless extension candidates. Maximal degree in co-relation 187543. Up to 7477 conditions per place. [2023-11-29 02:44:23,798 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 508 selfloop transitions, 259 changer transitions 20/788 dead transitions. [2023-11-29 02:44:23,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 788 transitions, 14240 flow [2023-11-29 02:44:23,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 02:44:23,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-29 02:44:23,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 166 transitions. [2023-11-29 02:44:23,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38425925925925924 [2023-11-29 02:44:23,799 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 166 transitions. [2023-11-29 02:44:23,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 166 transitions. [2023-11-29 02:44:23,800 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:44:23,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 166 transitions. [2023-11-29 02:44:23,800 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 10.375) internal successors, (166), 16 states have internal predecessors, (166), 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) [2023-11-29 02:44:23,801 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 27.0) internal successors, (459), 17 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:44:23,801 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 27.0) internal successors, (459), 17 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:44:23,801 INFO L175 Difference]: Start difference. First operand has 246 places, 538 transitions, 10036 flow. Second operand 16 states and 166 transitions. [2023-11-29 02:44:23,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 788 transitions, 14240 flow [2023-11-29 02:44:35,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 788 transitions, 13425 flow, removed 328 selfloop flow, removed 10 redundant places. [2023-11-29 02:44:35,957 INFO L231 Difference]: Finished difference. Result has 257 places, 555 transitions, 10372 flow [2023-11-29 02:44:35,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=9374, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=239, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=10372, PETRI_PLACES=257, PETRI_TRANSITIONS=555} [2023-11-29 02:44:35,958 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 230 predicate places. [2023-11-29 02:44:35,958 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 555 transitions, 10372 flow [2023-11-29 02:44:35,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.8) internal successors, (87), 15 states have internal predecessors, (87), 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) [2023-11-29 02:44:35,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:44:35,959 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:44:35,964 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 02:44:36,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:44:36,159 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:44:36,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:44:36,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1392008173, now seen corresponding path program 10 times [2023-11-29 02:44:36,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:44:36,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249423727] [2023-11-29 02:44:36,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:44:36,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:44:36,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:44:36,259 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 02:44:36,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:44:36,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249423727] [2023-11-29 02:44:36,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249423727] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:44:36,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008854229] [2023-11-29 02:44:36,260 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 02:44:36,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:44:36,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:44:36,261 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:44:36,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 02:44:36,381 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 02:44:36,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:44:36,382 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 02:44:36,384 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:44:36,449 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 02:44:36,449 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:44:36,494 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 02:44:36,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008854229] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:44:36,494 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:44:36,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-29 02:44:36,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972862467] [2023-11-29 02:44:36,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:44:36,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 02:44:36,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:44:36,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 02:44:36,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-11-29 02:44:36,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2023-11-29 02:44:36,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 555 transitions, 10372 flow. Second operand has 15 states, 15 states have (on average 6.133333333333334) internal successors, (92), 15 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:44:36,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:44:36,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2023-11-29 02:44:36,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:44:43,904 INFO L124 PetriNetUnfolderBase]: 15937/26439 cut-off events. [2023-11-29 02:44:43,905 INFO L125 PetriNetUnfolderBase]: For 604670/604670 co-relation queries the response was YES. [2023-11-29 02:44:44,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 207367 conditions, 26439 events. 15937/26439 cut-off events. For 604670/604670 co-relation queries the response was YES. Maximal size of possible extension queue 1022. Compared 201197 event pairs, 3101 based on Foata normal form. 416/26855 useless extension candidates. Maximal degree in co-relation 206627. Up to 12752 conditions per place. [2023-11-29 02:44:44,394 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 705 selfloop transitions, 187 changer transitions 5/898 dead transitions. [2023-11-29 02:44:44,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 898 transitions, 16525 flow [2023-11-29 02:44:44,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-29 02:44:44,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-29 02:44:44,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 209 transitions. [2023-11-29 02:44:44,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.387037037037037 [2023-11-29 02:44:44,396 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 209 transitions. [2023-11-29 02:44:44,396 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 209 transitions. [2023-11-29 02:44:44,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:44:44,397 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 209 transitions. [2023-11-29 02:44:44,397 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 10.45) internal successors, (209), 20 states have internal predecessors, (209), 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) [2023-11-29 02:44:44,399 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 27.0) internal successors, (567), 21 states have internal predecessors, (567), 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) [2023-11-29 02:44:44,399 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 27.0) internal successors, (567), 21 states have internal predecessors, (567), 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) [2023-11-29 02:44:44,399 INFO L175 Difference]: Start difference. First operand has 257 places, 555 transitions, 10372 flow. Second operand 20 states and 209 transitions. [2023-11-29 02:44:44,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 898 transitions, 16525 flow [2023-11-29 02:44:56,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 898 transitions, 16194 flow, removed 24 selfloop flow, removed 8 redundant places. [2023-11-29 02:44:56,876 INFO L231 Difference]: Finished difference. Result has 278 places, 615 transitions, 12183 flow [2023-11-29 02:44:56,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=9979, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=12183, PETRI_PLACES=278, PETRI_TRANSITIONS=615} [2023-11-29 02:44:56,877 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 251 predicate places. [2023-11-29 02:44:56,877 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 615 transitions, 12183 flow [2023-11-29 02:44:56,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.133333333333334) internal successors, (92), 15 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:44:56,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:44:56,878 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:44:56,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-29 02:44:57,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-29 02:44:57,078 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:44:57,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:44:57,079 INFO L85 PathProgramCache]: Analyzing trace with hash -312698932, now seen corresponding path program 11 times [2023-11-29 02:44:57,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:44:57,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284884956] [2023-11-29 02:44:57,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:44:57,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:44:57,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:44:57,186 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 02:44:57,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:44:57,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284884956] [2023-11-29 02:44:57,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284884956] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:44:57,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118487359] [2023-11-29 02:44:57,187 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 02:44:57,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:44:57,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:44:57,188 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:44:57,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 02:44:57,319 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-29 02:44:57,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:44:57,320 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 02:44:57,321 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:44:57,375 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 02:44:57,375 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:44:57,412 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 02:44:57,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118487359] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:44:57,412 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:44:57,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-29 02:44:57,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983228790] [2023-11-29 02:44:57,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:44:57,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 02:44:57,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:44:57,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 02:44:57,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-11-29 02:44:57,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2023-11-29 02:44:57,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 615 transitions, 12183 flow. Second operand has 15 states, 15 states have (on average 6.266666666666667) internal successors, (94), 15 states have internal predecessors, (94), 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) [2023-11-29 02:44:57,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:44:57,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2023-11-29 02:44:57,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:45:06,795 INFO L124 PetriNetUnfolderBase]: 17437/28835 cut-off events. [2023-11-29 02:45:06,795 INFO L125 PetriNetUnfolderBase]: For 778729/778729 co-relation queries the response was YES. [2023-11-29 02:45:07,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 240131 conditions, 28835 events. 17437/28835 cut-off events. For 778729/778729 co-relation queries the response was YES. Maximal size of possible extension queue 1133. Compared 221153 event pairs, 2442 based on Foata normal form. 260/29095 useless extension candidates. Maximal degree in co-relation 237867. Up to 13153 conditions per place. [2023-11-29 02:45:07,326 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 603 selfloop transitions, 299 changer transitions 5/908 dead transitions. [2023-11-29 02:45:07,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 908 transitions, 17462 flow [2023-11-29 02:45:07,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-29 02:45:07,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-29 02:45:07,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 219 transitions. [2023-11-29 02:45:07,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40555555555555556 [2023-11-29 02:45:07,328 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 219 transitions. [2023-11-29 02:45:07,328 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 219 transitions. [2023-11-29 02:45:07,328 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:45:07,329 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 219 transitions. [2023-11-29 02:45:07,329 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 10.95) internal successors, (219), 20 states have internal predecessors, (219), 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) [2023-11-29 02:45:07,330 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 27.0) internal successors, (567), 21 states have internal predecessors, (567), 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) [2023-11-29 02:45:07,331 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 27.0) internal successors, (567), 21 states have internal predecessors, (567), 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) [2023-11-29 02:45:07,331 INFO L175 Difference]: Start difference. First operand has 278 places, 615 transitions, 12183 flow. Second operand 20 states and 219 transitions. [2023-11-29 02:45:07,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 908 transitions, 17462 flow [2023-11-29 02:45:28,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 908 transitions, 16764 flow, removed 313 selfloop flow, removed 6 redundant places. [2023-11-29 02:45:28,495 INFO L231 Difference]: Finished difference. Result has 303 places, 657 transitions, 13803 flow [2023-11-29 02:45:28,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=11527, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=261, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=13803, PETRI_PLACES=303, PETRI_TRANSITIONS=657} [2023-11-29 02:45:28,496 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 276 predicate places. [2023-11-29 02:45:28,496 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 657 transitions, 13803 flow [2023-11-29 02:45:28,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.266666666666667) internal successors, (94), 15 states have internal predecessors, (94), 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) [2023-11-29 02:45:28,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:45:28,496 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:45:28,500 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 02:45:28,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-29 02:45:28,697 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:45:28,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:45:28,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1396578051, now seen corresponding path program 12 times [2023-11-29 02:45:28,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:45:28,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702888419] [2023-11-29 02:45:28,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:45:28,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:45:28,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:45:28,804 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 02:45:28,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:45:28,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702888419] [2023-11-29 02:45:28,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702888419] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:45:28,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355070159] [2023-11-29 02:45:28,804 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 02:45:28,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:45:28,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:45:28,806 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:45:28,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 02:45:29,011 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-29 02:45:29,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:45:29,012 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 02:45:29,014 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:45:29,075 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 02:45:29,075 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:45:29,122 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 02:45:29,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355070159] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:45:29,122 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:45:29,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-29 02:45:29,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064276877] [2023-11-29 02:45:29,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:45:29,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 02:45:29,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:45:29,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 02:45:29,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-11-29 02:45:29,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2023-11-29 02:45:29,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 657 transitions, 13803 flow. Second operand has 15 states, 15 states have (on average 6.2) internal successors, (93), 15 states have internal predecessors, (93), 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) [2023-11-29 02:45:29,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:45:29,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2023-11-29 02:45:29,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:45:40,507 INFO L124 PetriNetUnfolderBase]: 19371/31901 cut-off events. [2023-11-29 02:45:40,507 INFO L125 PetriNetUnfolderBase]: For 1017688/1017688 co-relation queries the response was YES. [2023-11-29 02:45:40,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 283364 conditions, 31901 events. 19371/31901 cut-off events. For 1017688/1017688 co-relation queries the response was YES. Maximal size of possible extension queue 1235. Compared 247371 event pairs, 994 based on Foata normal form. 300/32201 useless extension candidates. Maximal degree in co-relation 281321. Up to 12251 conditions per place. [2023-11-29 02:45:41,113 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 772 selfloop transitions, 311 changer transitions 8/1092 dead transitions. [2023-11-29 02:45:41,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 1092 transitions, 22026 flow [2023-11-29 02:45:41,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-29 02:45:41,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-29 02:45:41,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 284 transitions. [2023-11-29 02:45:41,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36270753512132825 [2023-11-29 02:45:41,115 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 284 transitions. [2023-11-29 02:45:41,115 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 284 transitions. [2023-11-29 02:45:41,115 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:45:41,115 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 284 transitions. [2023-11-29 02:45:41,116 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 9.793103448275861) internal successors, (284), 29 states have internal predecessors, (284), 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) [2023-11-29 02:45:41,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 27.0) internal successors, (810), 30 states have internal predecessors, (810), 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) [2023-11-29 02:45:41,118 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 27.0) internal successors, (810), 30 states have internal predecessors, (810), 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) [2023-11-29 02:45:41,118 INFO L175 Difference]: Start difference. First operand has 303 places, 657 transitions, 13803 flow. Second operand 29 states and 284 transitions. [2023-11-29 02:45:41,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 1092 transitions, 22026 flow [2023-11-29 02:46:09,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 1092 transitions, 21174 flow, removed 367 selfloop flow, removed 4 redundant places. [2023-11-29 02:46:09,705 INFO L231 Difference]: Finished difference. Result has 346 places, 734 transitions, 16098 flow [2023-11-29 02:46:09,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=13163, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=657, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=234, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=16098, PETRI_PLACES=346, PETRI_TRANSITIONS=734} [2023-11-29 02:46:09,706 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 319 predicate places. [2023-11-29 02:46:09,706 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 734 transitions, 16098 flow [2023-11-29 02:46:09,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.2) internal successors, (93), 15 states have internal predecessors, (93), 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) [2023-11-29 02:46:09,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:46:09,706 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:46:09,711 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 02:46:09,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-29 02:46:09,907 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:46:09,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:46:09,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1237411018, now seen corresponding path program 13 times [2023-11-29 02:46:09,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:46:09,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382451818] [2023-11-29 02:46:09,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:46:09,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:46:09,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:46:09,991 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 02:46:09,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:46:09,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382451818] [2023-11-29 02:46:09,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382451818] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:46:09,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24389460] [2023-11-29 02:46:09,991 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 02:46:09,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:46:09,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:46:09,993 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:46:09,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 02:46:10,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:46:10,130 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 02:46:10,131 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:46:10,197 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 02:46:10,197 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:46:10,233 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 02:46:10,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24389460] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:46:10,233 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:46:10,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-11-29 02:46:10,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702463845] [2023-11-29 02:46:10,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:46:10,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 02:46:10,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:46:10,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 02:46:10,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2023-11-29 02:46:10,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2023-11-29 02:46:10,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 734 transitions, 16098 flow. Second operand has 13 states, 13 states have (on average 6.538461538461538) internal successors, (85), 13 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) [2023-11-29 02:46:10,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:46:10,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2023-11-29 02:46:10,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:46:23,566 INFO L124 PetriNetUnfolderBase]: 21778/35690 cut-off events. [2023-11-29 02:46:23,566 INFO L125 PetriNetUnfolderBase]: For 1319769/1319769 co-relation queries the response was YES. [2023-11-29 02:46:24,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 331836 conditions, 35690 events. 21778/35690 cut-off events. For 1319769/1319769 co-relation queries the response was YES. Maximal size of possible extension queue 1393. Compared 279292 event pairs, 2783 based on Foata normal form. 158/35848 useless extension candidates. Maximal degree in co-relation 329459. Up to 14272 conditions per place. [2023-11-29 02:46:24,429 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 679 selfloop transitions, 385 changer transitions 3/1068 dead transitions. [2023-11-29 02:46:24,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 1068 transitions, 23280 flow [2023-11-29 02:46:24,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-29 02:46:24,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-29 02:46:24,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 209 transitions. [2023-11-29 02:46:24,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.387037037037037 [2023-11-29 02:46:24,430 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 209 transitions. [2023-11-29 02:46:24,430 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 209 transitions. [2023-11-29 02:46:24,431 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:46:24,431 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 209 transitions. [2023-11-29 02:46:24,431 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 10.45) internal successors, (209), 20 states have internal predecessors, (209), 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) [2023-11-29 02:46:24,432 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 27.0) internal successors, (567), 21 states have internal predecessors, (567), 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) [2023-11-29 02:46:24,432 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 27.0) internal successors, (567), 21 states have internal predecessors, (567), 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) [2023-11-29 02:46:24,432 INFO L175 Difference]: Start difference. First operand has 346 places, 734 transitions, 16098 flow. Second operand 20 states and 209 transitions. [2023-11-29 02:46:24,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 1068 transitions, 23280 flow [2023-11-29 02:47:02,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 1068 transitions, 22041 flow, removed 583 selfloop flow, removed 4 redundant places. [2023-11-29 02:47:02,996 INFO L231 Difference]: Finished difference. Result has 372 places, 806 transitions, 18708 flow [2023-11-29 02:47:02,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=15303, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=734, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=319, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=18708, PETRI_PLACES=372, PETRI_TRANSITIONS=806} [2023-11-29 02:47:02,997 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 345 predicate places. [2023-11-29 02:47:02,997 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 806 transitions, 18708 flow [2023-11-29 02:47:02,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.538461538461538) internal successors, (85), 13 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) [2023-11-29 02:47:02,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:47:02,997 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:47:03,003 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 02:47:03,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-29 02:47:03,198 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:47:03,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:47:03,198 INFO L85 PathProgramCache]: Analyzing trace with hash 47232352, now seen corresponding path program 14 times [2023-11-29 02:47:03,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:47:03,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945534008] [2023-11-29 02:47:03,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:47:03,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:47:03,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:47:03,307 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 02:47:03,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:47:03,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945534008] [2023-11-29 02:47:03,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945534008] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:47:03,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409295802] [2023-11-29 02:47:03,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:47:03,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:47:03,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:47:03,308 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:47:03,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 02:47:03,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:47:03,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:47:03,458 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 02:47:03,460 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:47:03,515 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 02:47:03,515 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:47:03,547 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 02:47:03,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409295802] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:47:03,547 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:47:03,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-11-29 02:47:03,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687100684] [2023-11-29 02:47:03,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:47:03,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 02:47:03,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:47:03,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 02:47:03,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-11-29 02:47:03,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2023-11-29 02:47:03,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 806 transitions, 18708 flow. Second operand has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 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) [2023-11-29 02:47:03,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:47:03,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2023-11-29 02:47:03,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:47:18,793 INFO L124 PetriNetUnfolderBase]: 21795/35741 cut-off events. [2023-11-29 02:47:18,793 INFO L125 PetriNetUnfolderBase]: For 1380559/1380559 co-relation queries the response was YES. [2023-11-29 02:47:19,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 342905 conditions, 35741 events. 21795/35741 cut-off events. For 1380559/1380559 co-relation queries the response was YES. Maximal size of possible extension queue 1402. Compared 280233 event pairs, 7495 based on Foata normal form. 34/35775 useless extension candidates. Maximal degree in co-relation 340699. Up to 30342 conditions per place. [2023-11-29 02:47:19,565 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 856 selfloop transitions, 98 changer transitions 3/958 dead transitions. [2023-11-29 02:47:19,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 958 transitions, 22137 flow [2023-11-29 02:47:19,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 02:47:19,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-29 02:47:19,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 122 transitions. [2023-11-29 02:47:19,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107744107744108 [2023-11-29 02:47:19,566 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 122 transitions. [2023-11-29 02:47:19,566 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 122 transitions. [2023-11-29 02:47:19,566 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:47:19,566 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 122 transitions. [2023-11-29 02:47:19,567 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 11.090909090909092) internal successors, (122), 11 states have internal predecessors, (122), 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) [2023-11-29 02:47:19,567 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 27.0) internal successors, (324), 12 states have internal predecessors, (324), 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) [2023-11-29 02:47:19,567 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 27.0) internal successors, (324), 12 states have internal predecessors, (324), 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) [2023-11-29 02:47:19,567 INFO L175 Difference]: Start difference. First operand has 372 places, 806 transitions, 18708 flow. Second operand 11 states and 122 transitions. [2023-11-29 02:47:19,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 958 transitions, 22137 flow [2023-11-29 02:47:53,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 958 transitions, 21592 flow, removed 196 selfloop flow, removed 11 redundant places. [2023-11-29 02:47:53,368 INFO L231 Difference]: Finished difference. Result has 373 places, 806 transitions, 18404 flow [2023-11-29 02:47:53,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=18163, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=806, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=708, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=18404, PETRI_PLACES=373, PETRI_TRANSITIONS=806} [2023-11-29 02:47:53,369 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 346 predicate places. [2023-11-29 02:47:53,369 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 806 transitions, 18404 flow [2023-11-29 02:47:53,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 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) [2023-11-29 02:47:53,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:47:53,370 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:47:53,375 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 02:47:53,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:47:53,570 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:47:53,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:47:53,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1439937742, now seen corresponding path program 15 times [2023-11-29 02:47:53,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:47:53,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816275569] [2023-11-29 02:47:53,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:47:53,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:47:53,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:47:53,676 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 02:47:53,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:47:53,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816275569] [2023-11-29 02:47:53,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816275569] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:47:53,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761411575] [2023-11-29 02:47:53,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 02:47:53,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:47:53,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:47:53,678 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:47:53,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 02:47:53,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 02:47:53,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:47:53,801 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 02:47:53,802 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:47:53,855 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 02:47:53,855 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:47:53,890 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 02:47:53,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761411575] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:47:53,890 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:47:53,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-29 02:47:53,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758024546] [2023-11-29 02:47:53,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:47:53,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 02:47:53,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:47:53,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 02:47:53,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2023-11-29 02:47:53,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2023-11-29 02:47:53,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 806 transitions, 18404 flow. Second operand has 15 states, 15 states have (on average 5.8) internal successors, (87), 15 states have internal predecessors, (87), 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) [2023-11-29 02:47:53,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:47:53,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2023-11-29 02:47:53,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:48:09,816 INFO L124 PetriNetUnfolderBase]: 22534/36962 cut-off events. [2023-11-29 02:48:09,816 INFO L125 PetriNetUnfolderBase]: For 1382917/1382917 co-relation queries the response was YES. [2023-11-29 02:48:10,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 350665 conditions, 36962 events. 22534/36962 cut-off events. For 1382917/1382917 co-relation queries the response was YES. Maximal size of possible extension queue 1450. Compared 290909 event pairs, 6899 based on Foata normal form. 46/37008 useless extension candidates. Maximal degree in co-relation 348179. Up to 28154 conditions per place. [2023-11-29 02:48:10,614 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 875 selfloop transitions, 141 changer transitions 23/1040 dead transitions. [2023-11-29 02:48:10,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 1040 transitions, 23228 flow [2023-11-29 02:48:10,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 02:48:10,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-29 02:48:10,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 155 transitions. [2023-11-29 02:48:10,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38271604938271603 [2023-11-29 02:48:10,615 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 155 transitions. [2023-11-29 02:48:10,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 155 transitions. [2023-11-29 02:48:10,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:48:10,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 155 transitions. [2023-11-29 02:48:10,616 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 10.333333333333334) internal successors, (155), 15 states have internal predecessors, (155), 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) [2023-11-29 02:48:10,617 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 27.0) internal successors, (432), 16 states have internal predecessors, (432), 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) [2023-11-29 02:48:10,617 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 27.0) internal successors, (432), 16 states have internal predecessors, (432), 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) [2023-11-29 02:48:10,618 INFO L175 Difference]: Start difference. First operand has 373 places, 806 transitions, 18404 flow. Second operand 15 states and 155 transitions. [2023-11-29 02:48:10,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 1040 transitions, 23228 flow [2023-11-29 02:48:51,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 1040 transitions, 23047 flow, removed 19 selfloop flow, removed 5 redundant places. [2023-11-29 02:48:51,333 INFO L231 Difference]: Finished difference. Result has 388 places, 816 transitions, 18982 flow [2023-11-29 02:48:51,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=18227, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=806, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=666, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=18982, PETRI_PLACES=388, PETRI_TRANSITIONS=816} [2023-11-29 02:48:51,334 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 361 predicate places. [2023-11-29 02:48:51,335 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 816 transitions, 18982 flow [2023-11-29 02:48:51,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.8) internal successors, (87), 15 states have internal predecessors, (87), 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) [2023-11-29 02:48:51,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:48:51,335 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:48:51,340 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 02:48:51,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:48:51,536 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:48:51,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:48:51,536 INFO L85 PathProgramCache]: Analyzing trace with hash 617591025, now seen corresponding path program 16 times [2023-11-29 02:48:51,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:48:51,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57154324] [2023-11-29 02:48:51,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:48:51,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:48:51,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:51,636 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 02:48:51,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:48:51,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57154324] [2023-11-29 02:48:51,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57154324] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:48:51,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134288861] [2023-11-29 02:48:51,637 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 02:48:51,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:48:51,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:48:51,639 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:48:51,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 02:48:51,778 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 02:48:51,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:48:51,779 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 02:48:51,780 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:48:51,816 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 02:48:51,816 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:48:51,850 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 02:48:51,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134288861] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:48:51,851 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:48:51,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-11-29 02:48:51,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043797427] [2023-11-29 02:48:51,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:48:51,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 02:48:51,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:48:51,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 02:48:51,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-11-29 02:48:51,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2023-11-29 02:48:51,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 816 transitions, 18982 flow. Second operand has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 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) [2023-11-29 02:48:51,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:48:51,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2023-11-29 02:48:51,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:49:09,307 INFO L124 PetriNetUnfolderBase]: 23929/39244 cut-off events. [2023-11-29 02:49:09,308 INFO L125 PetriNetUnfolderBase]: For 1481125/1481125 co-relation queries the response was YES. [2023-11-29 02:49:10,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 375037 conditions, 39244 events. 23929/39244 cut-off events. For 1481125/1481125 co-relation queries the response was YES. Maximal size of possible extension queue 1562. Compared 312112 event pairs, 900 based on Foata normal form. 74/39318 useless extension candidates. Maximal degree in co-relation 373345. Up to 13596 conditions per place. [2023-11-29 02:49:10,465 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 691 selfloop transitions, 467 changer transitions 7/1166 dead transitions. [2023-11-29 02:49:10,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 1166 transitions, 27656 flow [2023-11-29 02:49:10,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 02:49:10,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-29 02:49:10,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 150 transitions. [2023-11-29 02:49:10,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37037037037037035 [2023-11-29 02:49:10,467 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 150 transitions. [2023-11-29 02:49:10,467 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 150 transitions. [2023-11-29 02:49:10,467 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:49:10,467 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 150 transitions. [2023-11-29 02:49:10,468 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 10.0) internal successors, (150), 15 states have internal predecessors, (150), 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) [2023-11-29 02:49:10,468 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 27.0) internal successors, (432), 16 states have internal predecessors, (432), 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) [2023-11-29 02:49:10,468 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 27.0) internal successors, (432), 16 states have internal predecessors, (432), 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) [2023-11-29 02:49:10,469 INFO L175 Difference]: Start difference. First operand has 388 places, 816 transitions, 18982 flow. Second operand 15 states and 150 transitions. [2023-11-29 02:49:10,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 1166 transitions, 27656 flow [2023-11-29 02:49:56,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 1166 transitions, 27463 flow, removed 48 selfloop flow, removed 8 redundant places. [2023-11-29 02:49:56,647 INFO L231 Difference]: Finished difference. Result has 398 places, 934 transitions, 22983 flow [2023-11-29 02:49:56,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=18819, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=816, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=351, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=22983, PETRI_PLACES=398, PETRI_TRANSITIONS=934} [2023-11-29 02:49:56,648 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 371 predicate places. [2023-11-29 02:49:56,648 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 934 transitions, 22983 flow [2023-11-29 02:49:56,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 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) [2023-11-29 02:49:56,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:49:56,648 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:49:56,653 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 02:49:56,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:49:56,849 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:49:56,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:49:56,849 INFO L85 PathProgramCache]: Analyzing trace with hash 2037429370, now seen corresponding path program 17 times [2023-11-29 02:49:56,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:49:56,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514462793] [2023-11-29 02:49:56,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:49:56,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:49:56,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:49:56,952 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 02:49:56,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:49:56,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514462793] [2023-11-29 02:49:56,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514462793] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:49:56,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504330100] [2023-11-29 02:49:56,953 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 02:49:56,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:49:56,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:49:56,954 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:49:56,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 02:49:57,123 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-29 02:49:57,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:49:57,125 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 02:49:57,126 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:49:57,180 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 02:49:57,180 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:49:57,220 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 02:49:57,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504330100] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:49:57,220 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:49:57,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-11-29 02:49:57,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109861178] [2023-11-29 02:49:57,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:49:57,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 02:49:57,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:49:57,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 02:49:57,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-11-29 02:49:57,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2023-11-29 02:49:57,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 934 transitions, 22983 flow. Second operand has 12 states, 12 states have (on average 6.583333333333333) internal successors, (79), 12 states have internal predecessors, (79), 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) [2023-11-29 02:49:57,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:49:57,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2023-11-29 02:49:57,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:50:19,730 INFO L124 PetriNetUnfolderBase]: 24922/40803 cut-off events. [2023-11-29 02:50:19,730 INFO L125 PetriNetUnfolderBase]: For 1760623/1760623 co-relation queries the response was YES. [2023-11-29 02:50:20,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 414679 conditions, 40803 events. 24922/40803 cut-off events. For 1760623/1760623 co-relation queries the response was YES. Maximal size of possible extension queue 1663. Compared 325415 event pairs, 2789 based on Foata normal form. 72/40875 useless extension candidates. Maximal degree in co-relation 412329. Up to 11355 conditions per place. [2023-11-29 02:50:20,727 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 805 selfloop transitions, 465 changer transitions 3/1274 dead transitions. [2023-11-29 02:50:20,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 1274 transitions, 30088 flow [2023-11-29 02:50:20,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 02:50:20,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-29 02:50:20,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 235 transitions. [2023-11-29 02:50:20,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3956228956228956 [2023-11-29 02:50:20,728 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 235 transitions. [2023-11-29 02:50:20,728 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 235 transitions. [2023-11-29 02:50:20,728 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:50:20,729 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 235 transitions. [2023-11-29 02:50:20,729 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 10.681818181818182) internal successors, (235), 22 states have internal predecessors, (235), 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) [2023-11-29 02:50:20,730 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 27.0) internal successors, (621), 23 states have internal predecessors, (621), 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) [2023-11-29 02:50:20,731 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 27.0) internal successors, (621), 23 states have internal predecessors, (621), 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) [2023-11-29 02:50:20,731 INFO L175 Difference]: Start difference. First operand has 398 places, 934 transitions, 22983 flow. Second operand 22 states and 235 transitions. [2023-11-29 02:50:20,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 1274 transitions, 30088 flow [2023-11-29 02:51:22,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 1274 transitions, 29430 flow, removed 292 selfloop flow, removed 1 redundant places. [2023-11-29 02:51:22,997 INFO L231 Difference]: Finished difference. Result has 427 places, 972 transitions, 25483 flow [2023-11-29 02:51:22,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=22472, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=933, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=432, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=25483, PETRI_PLACES=427, PETRI_TRANSITIONS=972} [2023-11-29 02:51:22,998 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 400 predicate places. [2023-11-29 02:51:22,998 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 972 transitions, 25483 flow [2023-11-29 02:51:22,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.583333333333333) internal successors, (79), 12 states have internal predecessors, (79), 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) [2023-11-29 02:51:22,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:51:22,999 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:51:23,003 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 02:51:23,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-11-29 02:51:23,199 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:51:23,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:51:23,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1631884173, now seen corresponding path program 18 times [2023-11-29 02:51:23,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:51:23,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112202520] [2023-11-29 02:51:23,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:51:23,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:51:23,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:51:23,289 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 02:51:23,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:51:23,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112202520] [2023-11-29 02:51:23,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112202520] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:51:23,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674534722] [2023-11-29 02:51:23,289 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 02:51:23,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:51:23,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:51:23,291 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:51:23,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 02:51:23,421 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-29 02:51:23,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:51:23,423 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 02:51:23,424 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:51:23,469 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 02:51:23,470 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:51:23,502 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 02:51:23,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674534722] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:51:23,503 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:51:23,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-11-29 02:51:23,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987025428] [2023-11-29 02:51:23,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:51:23,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 02:51:23,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:51:23,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 02:51:23,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-11-29 02:51:23,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2023-11-29 02:51:23,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 972 transitions, 25483 flow. Second operand has 13 states, 13 states have (on average 6.615384615384615) internal successors, (86), 13 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) [2023-11-29 02:51:23,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:51:23,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2023-11-29 02:51:23,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:51:45,199 INFO L124 PetriNetUnfolderBase]: 27048/44265 cut-off events. [2023-11-29 02:51:45,199 INFO L125 PetriNetUnfolderBase]: For 2031355/2031355 co-relation queries the response was YES. [2023-11-29 02:51:46,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 463139 conditions, 44265 events. 27048/44265 cut-off events. For 2031355/2031355 co-relation queries the response was YES. Maximal size of possible extension queue 1823. Compared 357756 event pairs, 1441 based on Foata normal form. 210/44475 useless extension candidates. Maximal degree in co-relation 460604. Up to 16508 conditions per place. [2023-11-29 02:51:46,343 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 818 selfloop transitions, 505 changer transitions 6/1330 dead transitions. [2023-11-29 02:51:46,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 1330 transitions, 35111 flow [2023-11-29 02:51:46,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 02:51:46,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-29 02:51:46,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 167 transitions. [2023-11-29 02:51:46,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38657407407407407 [2023-11-29 02:51:46,345 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 167 transitions. [2023-11-29 02:51:46,345 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 167 transitions. [2023-11-29 02:51:46,345 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:51:46,345 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 167 transitions. [2023-11-29 02:51:46,346 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 10.4375) internal successors, (167), 16 states have internal predecessors, (167), 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) [2023-11-29 02:51:46,347 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 27.0) internal successors, (459), 17 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:51:46,347 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 27.0) internal successors, (459), 17 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:51:46,347 INFO L175 Difference]: Start difference. First operand has 427 places, 972 transitions, 25483 flow. Second operand 16 states and 167 transitions. [2023-11-29 02:51:46,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 1330 transitions, 35111 flow [2023-11-29 02:52:56,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 1330 transitions, 34335 flow, removed 332 selfloop flow, removed 6 redundant places. [2023-11-29 02:52:56,645 INFO L231 Difference]: Finished difference. Result has 446 places, 1076 transitions, 29454 flow [2023-11-29 02:52:56,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=24868, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=971, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=400, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=533, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=29454, PETRI_PLACES=446, PETRI_TRANSITIONS=1076} [2023-11-29 02:52:56,646 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 419 predicate places. [2023-11-29 02:52:56,646 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 1076 transitions, 29454 flow [2023-11-29 02:52:56,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.615384615384615) internal successors, (86), 13 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) [2023-11-29 02:52:56,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:52:56,647 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:52:56,651 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 02:52:56,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-11-29 02:52:56,847 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:52:56,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:52:56,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1049839690, now seen corresponding path program 19 times [2023-11-29 02:52:56,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:52:56,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955552954] [2023-11-29 02:52:56,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:52:56,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:52:56,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:52:56,941 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 02:52:56,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:52:56,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955552954] [2023-11-29 02:52:56,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955552954] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:52:56,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723828944] [2023-11-29 02:52:56,942 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 02:52:56,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:52:56,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:52:56,943 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:52:56,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 02:52:57,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:52:57,075 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 02:52:57,075 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:52:57,107 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 02:52:57,108 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:52:57,133 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 02:52:57,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723828944] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:52:57,133 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:52:57,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-11-29 02:52:57,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448671807] [2023-11-29 02:52:57,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:52:57,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 02:52:57,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:52:57,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 02:52:57,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-11-29 02:52:57,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2023-11-29 02:52:57,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 1076 transitions, 29454 flow. Second operand has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 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) [2023-11-29 02:52:57,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:52:57,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2023-11-29 02:52:57,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:53:20,545 INFO L124 PetriNetUnfolderBase]: 27060/44301 cut-off events. [2023-11-29 02:53:20,545 INFO L125 PetriNetUnfolderBase]: For 2155771/2155771 co-relation queries the response was YES. [2023-11-29 02:53:21,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 482321 conditions, 44301 events. 27060/44301 cut-off events. For 2155771/2155771 co-relation queries the response was YES. Maximal size of possible extension queue 1822. Compared 357745 event pairs, 6693 based on Foata normal form. 6/44307 useless extension candidates. Maximal degree in co-relation 479478. Up to 27651 conditions per place. [2023-11-29 02:53:21,768 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 996 selfloop transitions, 153 changer transitions 13/1163 dead transitions. [2023-11-29 02:53:21,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 1163 transitions, 32833 flow [2023-11-29 02:53:21,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 02:53:21,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 02:53:21,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 84 transitions. [2023-11-29 02:53:21,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2023-11-29 02:53:21,769 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 84 transitions. [2023-11-29 02:53:21,769 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 84 transitions. [2023-11-29 02:53:21,769 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:53:21,769 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 84 transitions. [2023-11-29 02:53:21,769 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 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) [2023-11-29 02:53:21,770 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 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) [2023-11-29 02:53:21,770 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 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) [2023-11-29 02:53:21,770 INFO L175 Difference]: Start difference. First operand has 446 places, 1076 transitions, 29454 flow. Second operand 7 states and 84 transitions. [2023-11-29 02:53:21,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 1163 transitions, 32833 flow [2023-11-29 02:54:24,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 1163 transitions, 32441 flow, removed 129 selfloop flow, removed 3 redundant places. [2023-11-29 02:54:24,766 INFO L231 Difference]: Finished difference. Result has 451 places, 1074 transitions, 29318 flow [2023-11-29 02:54:24,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=29063, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1076, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=923, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=29318, PETRI_PLACES=451, PETRI_TRANSITIONS=1074} [2023-11-29 02:54:24,767 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 424 predicate places. [2023-11-29 02:54:24,768 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 1074 transitions, 29318 flow [2023-11-29 02:54:24,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 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) [2023-11-29 02:54:24,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:54:24,768 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:54:24,772 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 02:54:24,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-11-29 02:54:24,968 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:54:24,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:54:24,969 INFO L85 PathProgramCache]: Analyzing trace with hash 435249636, now seen corresponding path program 20 times [2023-11-29 02:54:24,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:54:24,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733467121] [2023-11-29 02:54:24,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:54:24,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:54:24,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:54:25,066 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 02:54:25,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:54:25,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733467121] [2023-11-29 02:54:25,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733467121] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:54:25,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953634850] [2023-11-29 02:54:25,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:54:25,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:54:25,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:54:25,068 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:54:25,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 02:54:25,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:54:25,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:54:25,213 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 02:54:25,214 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:54:25,252 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 02:54:25,252 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:54:25,282 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 02:54:25,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953634850] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:54:25,282 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:54:25,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-11-29 02:54:25,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515733217] [2023-11-29 02:54:25,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:54:25,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 02:54:25,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:54:25,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 02:54:25,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-11-29 02:54:25,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2023-11-29 02:54:25,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 1074 transitions, 29318 flow. Second operand has 13 states, 13 states have (on average 6.153846153846154) internal successors, (80), 13 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) [2023-11-29 02:54:25,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:54:25,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2023-11-29 02:54:25,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:54:48,919 INFO L124 PetriNetUnfolderBase]: 27013/44211 cut-off events. [2023-11-29 02:54:48,919 INFO L125 PetriNetUnfolderBase]: For 2175172/2175172 co-relation queries the response was YES. [2023-11-29 02:54:49,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 481936 conditions, 44211 events. 27013/44211 cut-off events. For 2175172/2175172 co-relation queries the response was YES. Maximal size of possible extension queue 1822. Compared 357067 event pairs, 6601 based on Foata normal form. 12/44223 useless extension candidates. Maximal degree in co-relation 481390. Up to 27695 conditions per place. [2023-11-29 02:54:50,194 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 1018 selfloop transitions, 193 changer transitions 10/1222 dead transitions. [2023-11-29 02:54:50,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 1222 transitions, 33382 flow [2023-11-29 02:54:50,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 02:54:50,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-29 02:54:50,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 120 transitions. [2023-11-29 02:54:50,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40404040404040403 [2023-11-29 02:54:50,195 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 120 transitions. [2023-11-29 02:54:50,195 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 120 transitions. [2023-11-29 02:54:50,195 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:54:50,195 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 120 transitions. [2023-11-29 02:54:50,196 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 10.909090909090908) internal successors, (120), 11 states have internal predecessors, (120), 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) [2023-11-29 02:54:50,196 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 27.0) internal successors, (324), 12 states have internal predecessors, (324), 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) [2023-11-29 02:54:50,196 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 27.0) internal successors, (324), 12 states have internal predecessors, (324), 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) [2023-11-29 02:54:50,196 INFO L175 Difference]: Start difference. First operand has 451 places, 1074 transitions, 29318 flow. Second operand 11 states and 120 transitions. [2023-11-29 02:54:50,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 1222 transitions, 33382 flow [2023-11-29 02:55:49,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 1222 transitions, 33069 flow, removed 5 selfloop flow, removed 5 redundant places. [2023-11-29 02:55:49,609 INFO L231 Difference]: Finished difference. Result has 456 places, 1070 transitions, 29349 flow [2023-11-29 02:55:49,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=28986, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1073, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=880, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=29349, PETRI_PLACES=456, PETRI_TRANSITIONS=1070} [2023-11-29 02:55:49,610 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 429 predicate places. [2023-11-29 02:55:49,610 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 1070 transitions, 29349 flow [2023-11-29 02:55:49,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.153846153846154) internal successors, (80), 13 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) [2023-11-29 02:55:49,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:55:49,611 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:55:49,615 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-29 02:55:49,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-11-29 02:55:49,811 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:55:49,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:55:49,812 INFO L85 PathProgramCache]: Analyzing trace with hash 67341242, now seen corresponding path program 21 times [2023-11-29 02:55:49,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:55:49,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709118711] [2023-11-29 02:55:49,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:55:49,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:55:49,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:55:49,886 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 02:55:49,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:55:49,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709118711] [2023-11-29 02:55:49,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709118711] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:55:49,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729489653] [2023-11-29 02:55:49,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 02:55:49,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:55:49,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:55:49,887 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:55:49,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a3a636-54c8-4379-ad30-62ab24019973/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 02:55:50,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 02:55:50,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:55:50,069 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 02:55:50,070 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:55:50,121 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 02:55:50,121 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:55:50,162 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 02:55:50,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729489653] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:55:50,163 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:55:50,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-11-29 02:55:50,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410906356] [2023-11-29 02:55:50,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:55:50,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 02:55:50,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:55:50,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 02:55:50,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-11-29 02:55:50,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2023-11-29 02:55:50,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 1070 transitions, 29349 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 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) [2023-11-29 02:55:50,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:55:50,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2023-11-29 02:55:50,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:56:14,078 INFO L124 PetriNetUnfolderBase]: 26990/44156 cut-off events. [2023-11-29 02:56:14,078 INFO L125 PetriNetUnfolderBase]: For 2177646/2177646 co-relation queries the response was YES. [2023-11-29 02:56:14,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 482304 conditions, 44156 events. 26990/44156 cut-off events. For 2177646/2177646 co-relation queries the response was YES. Maximal size of possible extension queue 1837. Compared 356427 event pairs, 5383 based on Foata normal form. 28/44184 useless extension candidates. Maximal degree in co-relation 479360. Up to 22453 conditions per place. [2023-11-29 02:56:15,098 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 1004 selfloop transitions, 267 changer transitions 2/1274 dead transitions. [2023-11-29 02:56:15,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 1274 transitions, 34217 flow [2023-11-29 02:56:15,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 02:56:15,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-29 02:56:15,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 135 transitions. [2023-11-29 02:56:15,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2023-11-29 02:56:15,099 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 135 transitions. [2023-11-29 02:56:15,100 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 135 transitions. [2023-11-29 02:56:15,100 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:56:15,100 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 135 transitions. [2023-11-29 02:56:15,100 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 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) [2023-11-29 02:56:15,101 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 27.0) internal successors, (351), 13 states have internal predecessors, (351), 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) [2023-11-29 02:56:15,101 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 27.0) internal successors, (351), 13 states have internal predecessors, (351), 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) [2023-11-29 02:56:15,101 INFO L175 Difference]: Start difference. First operand has 456 places, 1070 transitions, 29349 flow. Second operand 12 states and 135 transitions. [2023-11-29 02:56:15,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 1274 transitions, 34217 flow