./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/unroll-3.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_3119035f-5ca6-4d34-acbf-736492195747/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3119035f-5ca6-4d34-acbf-736492195747/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_3119035f-5ca6-4d34-acbf-736492195747/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3119035f-5ca6-4d34-acbf-736492195747/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/unroll-3.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3119035f-5ca6-4d34-acbf-736492195747/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_3119035f-5ca6-4d34-acbf-736492195747/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 a4cca88acec68e5dbb90cd5700ef248bb5273dc097847f9475a683bfbdc7b189 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 00:51:17,200 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 00:51:17,282 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3119035f-5ca6-4d34-acbf-736492195747/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 00:51:17,286 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 00:51:17,287 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 00:51:17,309 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 00:51:17,310 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 00:51:17,310 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 00:51:17,311 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 00:51:17,312 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 00:51:17,312 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 00:51:17,313 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 00:51:17,313 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 00:51:17,314 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 00:51:17,314 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 00:51:17,315 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 00:51:17,315 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 00:51:17,316 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 00:51:17,316 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 00:51:17,317 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 00:51:17,317 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 00:51:17,318 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 00:51:17,318 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 00:51:17,318 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 00:51:17,319 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 00:51:17,319 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 00:51:17,320 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 00:51:17,320 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 00:51:17,320 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 00:51:17,321 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 00:51:17,321 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 00:51:17,321 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:51:17,322 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 00:51:17,322 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 00:51:17,322 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 00:51:17,322 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 00:51:17,322 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 00:51:17,322 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 00:51:17,323 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 00:51:17,323 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 00:51:17,323 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 00:51:17,323 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 00:51:17,324 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_3119035f-5ca6-4d34-acbf-736492195747/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3119035f-5ca6-4d34-acbf-736492195747/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a4cca88acec68e5dbb90cd5700ef248bb5273dc097847f9475a683bfbdc7b189 [2023-11-29 00:51:17,570 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 00:51:17,589 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 00:51:17,591 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 00:51:17,593 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 00:51:17,593 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 00:51:17,594 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3119035f-5ca6-4d34-acbf-736492195747/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/unroll-3.wvr.c [2023-11-29 00:51:20,304 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 00:51:20,502 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 00:51:20,503 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3119035f-5ca6-4d34-acbf-736492195747/sv-benchmarks/c/weaver/unroll-3.wvr.c [2023-11-29 00:51:20,510 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3119035f-5ca6-4d34-acbf-736492195747/bin/uautomizer-verify-BQ2R08f2Ya/data/c36e7ef78/9911304fdf4c4a598a403bd93b26e5fa/FLAGca3fdbb42 [2023-11-29 00:51:20,522 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3119035f-5ca6-4d34-acbf-736492195747/bin/uautomizer-verify-BQ2R08f2Ya/data/c36e7ef78/9911304fdf4c4a598a403bd93b26e5fa [2023-11-29 00:51:20,525 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 00:51:20,526 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 00:51:20,527 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 00:51:20,527 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 00:51:20,532 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 00:51:20,533 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:51:20" (1/1) ... [2023-11-29 00:51:20,533 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@196300d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:51:20, skipping insertion in model container [2023-11-29 00:51:20,534 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:51:20" (1/1) ... [2023-11-29 00:51:20,556 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 00:51:20,706 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_3119035f-5ca6-4d34-acbf-736492195747/sv-benchmarks/c/weaver/unroll-3.wvr.c[2526,2539] [2023-11-29 00:51:20,715 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:51:20,726 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 00:51:20,746 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_3119035f-5ca6-4d34-acbf-736492195747/sv-benchmarks/c/weaver/unroll-3.wvr.c[2526,2539] [2023-11-29 00:51:20,750 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:51:20,764 INFO L206 MainTranslator]: Completed translation [2023-11-29 00:51:20,765 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:51:20 WrapperNode [2023-11-29 00:51:20,765 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 00:51:20,766 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 00:51:20,766 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 00:51:20,766 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 00:51:20,772 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:51:20" (1/1) ... [2023-11-29 00:51:20,779 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:51:20" (1/1) ... [2023-11-29 00:51:20,809 INFO L138 Inliner]: procedures = 24, calls = 34, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 149 [2023-11-29 00:51:20,810 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 00:51:20,811 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 00:51:20,811 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 00:51:20,811 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 00:51:20,820 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:51:20" (1/1) ... [2023-11-29 00:51:20,820 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:51:20" (1/1) ... [2023-11-29 00:51:20,823 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:51:20" (1/1) ... [2023-11-29 00:51:20,839 INFO L175 MemorySlicer]: Split 11 memory accesses to 4 slices as follows [2, 2, 5, 2]. 45 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2023-11-29 00:51:20,839 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:51:20" (1/1) ... [2023-11-29 00:51:20,840 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:51:20" (1/1) ... [2023-11-29 00:51:20,848 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:51:20" (1/1) ... [2023-11-29 00:51:20,852 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:51:20" (1/1) ... [2023-11-29 00:51:20,854 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:51:20" (1/1) ... [2023-11-29 00:51:20,856 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:51:20" (1/1) ... [2023-11-29 00:51:20,860 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 00:51:20,861 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 00:51:20,861 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 00:51:20,861 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 00:51:20,862 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:51:20" (1/1) ... [2023-11-29 00:51:20,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:51:20,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3119035f-5ca6-4d34-acbf-736492195747/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:51:20,890 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3119035f-5ca6-4d34-acbf-736492195747/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 00:51:20,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3119035f-5ca6-4d34-acbf-736492195747/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 00:51:20,926 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 00:51:20,927 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-29 00:51:20,927 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-29 00:51:20,927 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-29 00:51:20,927 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-29 00:51:20,927 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 00:51:20,928 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 00:51:20,928 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 00:51:20,928 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 00:51:20,928 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 00:51:20,928 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 00:51:20,928 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 00:51:20,929 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 00:51:20,929 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-29 00:51:20,929 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 00:51:20,929 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 00:51:20,929 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 00:51:20,929 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 00:51:20,930 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 00:51:20,930 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 00:51:20,930 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-29 00:51:20,930 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 00:51:20,932 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 00:51:21,048 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 00:51:21,050 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 00:51:21,304 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 00:51:21,553 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 00:51:21,554 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-29 00:51:21,554 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:51:21 BoogieIcfgContainer [2023-11-29 00:51:21,554 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 00:51:21,557 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 00:51:21,557 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 00:51:21,560 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 00:51:21,561 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 12:51:20" (1/3) ... [2023-11-29 00:51:21,561 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7169ef81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:51:21, skipping insertion in model container [2023-11-29 00:51:21,561 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:51:20" (2/3) ... [2023-11-29 00:51:21,562 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7169ef81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:51:21, skipping insertion in model container [2023-11-29 00:51:21,562 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:51:21" (3/3) ... [2023-11-29 00:51:21,563 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-3.wvr.c [2023-11-29 00:51:21,572 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-29 00:51:21,583 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 00:51:21,583 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 00:51:21,583 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 00:51:21,624 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-29 00:51:21,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 25 places, 21 transitions, 56 flow [2023-11-29 00:51:21,685 INFO L124 PetriNetUnfolderBase]: 3/19 cut-off events. [2023-11-29 00:51:21,686 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 00:51:21,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 19 events. 3/19 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 10 event pairs, 0 based on Foata normal form. 0/15 useless extension candidates. Maximal degree in co-relation 11. Up to 2 conditions per place. [2023-11-29 00:51:21,689 INFO L82 GeneralOperation]: Start removeDead. Operand has 25 places, 21 transitions, 56 flow [2023-11-29 00:51:21,692 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 22 places, 18 transitions, 48 flow [2023-11-29 00:51:21,703 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 00:51:21,711 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;@12ac0eb8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 00:51:21,711 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-29 00:51:21,719 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 00:51:21,720 INFO L124 PetriNetUnfolderBase]: 3/17 cut-off events. [2023-11-29 00:51:21,720 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 00:51:21,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:51:21,721 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:51:21,721 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 00:51:21,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:51:21,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1764738099, now seen corresponding path program 1 times [2023-11-29 00:51:21,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:51:21,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676907265] [2023-11-29 00:51:21,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:51:21,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:51:21,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:51:22,056 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 00:51:22,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:51:22,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676907265] [2023-11-29 00:51:22,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676907265] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:51:22,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:51:22,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:51:22,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914642799] [2023-11-29 00:51:22,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:51:22,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:51:22,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:51:22,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:51:22,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:51:22,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 00:51:22,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 18 transitions, 48 flow. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states 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 00:51:22,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:51:22,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 00:51:22,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:51:22,195 INFO L124 PetriNetUnfolderBase]: 75/137 cut-off events. [2023-11-29 00:51:22,195 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2023-11-29 00:51:22,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 297 conditions, 137 events. 75/137 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 352 event pairs, 24 based on Foata normal form. 1/105 useless extension candidates. Maximal degree in co-relation 220. Up to 79 conditions per place. [2023-11-29 00:51:22,199 INFO L140 encePairwiseOnDemand]: 17/21 looper letters, 25 selfloop transitions, 3 changer transitions 1/30 dead transitions. [2023-11-29 00:51:22,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 30 transitions, 139 flow [2023-11-29 00:51:22,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:51:22,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:51:22,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 39 transitions. [2023-11-29 00:51:22,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2023-11-29 00:51:22,213 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 39 transitions. [2023-11-29 00:51:22,213 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 39 transitions. [2023-11-29 00:51:22,214 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:51:22,217 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 39 transitions. [2023-11-29 00:51:22,219 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 13.0) internal successors, (39), 3 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 00:51:22,222 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 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 00:51:22,222 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 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 00:51:22,224 INFO L175 Difference]: Start difference. First operand has 22 places, 18 transitions, 48 flow. Second operand 3 states and 39 transitions. [2023-11-29 00:51:22,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 30 transitions, 139 flow [2023-11-29 00:51:22,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 30 transitions, 125 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 00:51:22,230 INFO L231 Difference]: Finished difference. Result has 21 places, 20 transitions, 59 flow [2023-11-29 00:51:22,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=59, PETRI_PLACES=21, PETRI_TRANSITIONS=20} [2023-11-29 00:51:22,236 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, -1 predicate places. [2023-11-29 00:51:22,236 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 20 transitions, 59 flow [2023-11-29 00:51:22,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states 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 00:51:22,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:51:22,237 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:51:22,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 00:51:22,237 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 00:51:22,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:51:22,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1495654762, now seen corresponding path program 1 times [2023-11-29 00:51:22,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:51:22,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103879499] [2023-11-29 00:51:22,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:51:22,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:51:22,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:51:22,443 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:51:22,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:51:22,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103879499] [2023-11-29 00:51:22,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103879499] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:51:22,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:51:22,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:51:22,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200750250] [2023-11-29 00:51:22,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:51:22,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:51:22,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:51:22,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:51:22,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:51:22,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 00:51:22,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 20 transitions, 59 flow. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states 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 00:51:22,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:51:22,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 00:51:22,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:51:22,522 INFO L124 PetriNetUnfolderBase]: 75/138 cut-off events. [2023-11-29 00:51:22,522 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2023-11-29 00:51:22,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 335 conditions, 138 events. 75/138 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 338 event pairs, 48 based on Foata normal form. 0/137 useless extension candidates. Maximal degree in co-relation 120. Up to 137 conditions per place. [2023-11-29 00:51:22,525 INFO L140 encePairwiseOnDemand]: 18/21 looper letters, 18 selfloop transitions, 2 changer transitions 0/21 dead transitions. [2023-11-29 00:51:22,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 21 transitions, 101 flow [2023-11-29 00:51:22,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:51:22,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:51:22,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 28 transitions. [2023-11-29 00:51:22,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2023-11-29 00:51:22,526 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 28 transitions. [2023-11-29 00:51:22,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 28 transitions. [2023-11-29 00:51:22,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:51:22,527 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 28 transitions. [2023-11-29 00:51:22,527 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states 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 00:51:22,528 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 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 00:51:22,528 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 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 00:51:22,529 INFO L175 Difference]: Start difference. First operand has 21 places, 20 transitions, 59 flow. Second operand 3 states and 28 transitions. [2023-11-29 00:51:22,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 21 transitions, 101 flow [2023-11-29 00:51:22,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 21 transitions, 98 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 00:51:22,530 INFO L231 Difference]: Finished difference. Result has 23 places, 21 transitions, 68 flow [2023-11-29 00:51:22,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=68, PETRI_PLACES=23, PETRI_TRANSITIONS=21} [2023-11-29 00:51:22,532 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 1 predicate places. [2023-11-29 00:51:22,532 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 21 transitions, 68 flow [2023-11-29 00:51:22,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states 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 00:51:22,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:51:22,532 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:51:22,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 00:51:22,533 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 00:51:22,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:51:22,533 INFO L85 PathProgramCache]: Analyzing trace with hash 689632753, now seen corresponding path program 1 times [2023-11-29 00:51:22,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:51:22,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908236121] [2023-11-29 00:51:22,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:51:22,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:51:22,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:51:22,723 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:51:22,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:51:22,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908236121] [2023-11-29 00:51:22,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908236121] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:51:22,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769157698] [2023-11-29 00:51:22,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:51:22,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:51:22,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3119035f-5ca6-4d34-acbf-736492195747/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:51:22,726 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3119035f-5ca6-4d34-acbf-736492195747/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:51:22,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3119035f-5ca6-4d34-acbf-736492195747/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 00:51:22,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:51:22,832 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 00:51:22,836 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:51:22,902 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:51:22,902 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:51:22,950 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 00:51:22,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769157698] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 00:51:22,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:51:22,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 6 [2023-11-29 00:51:22,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250547054] [2023-11-29 00:51:22,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:51:22,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:51:22,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:51:22,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:51:22,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-29 00:51:22,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 00:51:22,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 21 transitions, 68 flow. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states 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 00:51:22,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:51:22,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 00:51:22,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:51:23,072 INFO L124 PetriNetUnfolderBase]: 83/152 cut-off events. [2023-11-29 00:51:23,072 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2023-11-29 00:51:23,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 361 conditions, 152 events. 83/152 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 415 event pairs, 24 based on Foata normal form. 6/157 useless extension candidates. Maximal degree in co-relation 348. Up to 78 conditions per place. [2023-11-29 00:51:23,074 INFO L140 encePairwiseOnDemand]: 17/21 looper letters, 31 selfloop transitions, 4 changer transitions 1/37 dead transitions. [2023-11-29 00:51:23,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 37 transitions, 180 flow [2023-11-29 00:51:23,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:51:23,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 00:51:23,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 48 transitions. [2023-11-29 00:51:23,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2023-11-29 00:51:23,076 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 48 transitions. [2023-11-29 00:51:23,076 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 48 transitions. [2023-11-29 00:51:23,077 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:51:23,077 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 48 transitions. [2023-11-29 00:51:23,077 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states 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 00:51:23,078 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 0 states have call successors, (0), 0 states 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 00:51:23,078 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 0 states have call successors, (0), 0 states 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 00:51:23,078 INFO L175 Difference]: Start difference. First operand has 23 places, 21 transitions, 68 flow. Second operand 4 states and 48 transitions. [2023-11-29 00:51:23,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 37 transitions, 180 flow [2023-11-29 00:51:23,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 37 transitions, 176 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-29 00:51:23,081 INFO L231 Difference]: Finished difference. Result has 27 places, 23 transitions, 90 flow [2023-11-29 00:51:23,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=90, PETRI_PLACES=27, PETRI_TRANSITIONS=23} [2023-11-29 00:51:23,082 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 5 predicate places. [2023-11-29 00:51:23,082 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 23 transitions, 90 flow [2023-11-29 00:51:23,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states 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 00:51:23,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:51:23,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:51:23,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3119035f-5ca6-4d34-acbf-736492195747/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 00:51:23,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3119035f-5ca6-4d34-acbf-736492195747/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-29 00:51:23,288 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 00:51:23,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:51:23,288 INFO L85 PathProgramCache]: Analyzing trace with hash -888707086, now seen corresponding path program 1 times [2023-11-29 00:51:23,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:51:23,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739440094] [2023-11-29 00:51:23,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:51:23,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:51:23,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:51:23,476 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 00:51:23,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:51:23,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739440094] [2023-11-29 00:51:23,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739440094] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:51:23,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:51:23,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 00:51:23,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172745562] [2023-11-29 00:51:23,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:51:23,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:51:23,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:51:23,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:51:23,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:51:23,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 00:51:23,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 23 transitions, 90 flow. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:51:23,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:51:23,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 00:51:23,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:51:23,643 INFO L124 PetriNetUnfolderBase]: 93/186 cut-off events. [2023-11-29 00:51:23,644 INFO L125 PetriNetUnfolderBase]: For 170/170 co-relation queries the response was YES. [2023-11-29 00:51:23,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 511 conditions, 186 events. 93/186 cut-off events. For 170/170 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 632 event pairs, 26 based on Foata normal form. 12/197 useless extension candidates. Maximal degree in co-relation 492. Up to 101 conditions per place. [2023-11-29 00:51:23,646 INFO L140 encePairwiseOnDemand]: 16/21 looper letters, 33 selfloop transitions, 4 changer transitions 8/46 dead transitions. [2023-11-29 00:51:23,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 46 transitions, 255 flow [2023-11-29 00:51:23,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:51:23,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 00:51:23,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 56 transitions. [2023-11-29 00:51:23,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2023-11-29 00:51:23,648 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 56 transitions. [2023-11-29 00:51:23,648 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 56 transitions. [2023-11-29 00:51:23,648 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:51:23,649 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 56 transitions. [2023-11-29 00:51:23,649 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states 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 00:51:23,650 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states 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 00:51:23,650 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states 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 00:51:23,650 INFO L175 Difference]: Start difference. First operand has 27 places, 23 transitions, 90 flow. Second operand 5 states and 56 transitions. [2023-11-29 00:51:23,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 46 transitions, 255 flow [2023-11-29 00:51:23,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 46 transitions, 250 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-29 00:51:23,654 INFO L231 Difference]: Finished difference. Result has 33 places, 25 transitions, 117 flow [2023-11-29 00:51:23,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=117, PETRI_PLACES=33, PETRI_TRANSITIONS=25} [2023-11-29 00:51:23,655 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 11 predicate places. [2023-11-29 00:51:23,655 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 25 transitions, 117 flow [2023-11-29 00:51:23,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:51:23,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:51:23,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:51:23,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 00:51:23,656 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 00:51:23,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:51:23,656 INFO L85 PathProgramCache]: Analyzing trace with hash 936842816, now seen corresponding path program 2 times [2023-11-29 00:51:23,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:51:23,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989979565] [2023-11-29 00:51:23,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:51:23,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:51:23,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:51:23,791 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 00:51:23,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:51:23,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989979565] [2023-11-29 00:51:23,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989979565] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:51:23,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:51:23,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 00:51:23,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092731887] [2023-11-29 00:51:23,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:51:23,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:51:23,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:51:23,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:51:23,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:51:23,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 00:51:23,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 25 transitions, 117 flow. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states 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 00:51:23,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:51:23,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 00:51:23,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:51:23,916 INFO L124 PetriNetUnfolderBase]: 93/181 cut-off events. [2023-11-29 00:51:23,917 INFO L125 PetriNetUnfolderBase]: For 196/196 co-relation queries the response was YES. [2023-11-29 00:51:23,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 612 conditions, 181 events. 93/181 cut-off events. For 196/196 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 552 event pairs, 28 based on Foata normal form. 4/184 useless extension candidates. Maximal degree in co-relation 590. Up to 114 conditions per place. [2023-11-29 00:51:23,919 INFO L140 encePairwiseOnDemand]: 17/21 looper letters, 29 selfloop transitions, 4 changer transitions 4/38 dead transitions. [2023-11-29 00:51:23,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 38 transitions, 242 flow [2023-11-29 00:51:23,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:51:23,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 00:51:23,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 46 transitions. [2023-11-29 00:51:23,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2023-11-29 00:51:23,921 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 46 transitions. [2023-11-29 00:51:23,921 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 46 transitions. [2023-11-29 00:51:23,921 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:51:23,922 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 46 transitions. [2023-11-29 00:51:23,922 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states 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 00:51:23,923 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 0 states have call successors, (0), 0 states 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 00:51:23,923 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 0 states have call successors, (0), 0 states 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 00:51:23,923 INFO L175 Difference]: Start difference. First operand has 33 places, 25 transitions, 117 flow. Second operand 4 states and 46 transitions. [2023-11-29 00:51:23,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 38 transitions, 242 flow [2023-11-29 00:51:23,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 38 transitions, 229 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-11-29 00:51:23,926 INFO L231 Difference]: Finished difference. Result has 35 places, 27 transitions, 136 flow [2023-11-29 00:51:23,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=136, PETRI_PLACES=35, PETRI_TRANSITIONS=27} [2023-11-29 00:51:23,927 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 13 predicate places. [2023-11-29 00:51:23,927 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 27 transitions, 136 flow [2023-11-29 00:51:23,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states 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 00:51:23,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:51:23,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:51:23,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-29 00:51:23,928 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 00:51:23,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:51:23,929 INFO L85 PathProgramCache]: Analyzing trace with hash 278282927, now seen corresponding path program 2 times [2023-11-29 00:51:23,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:51:23,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838239711] [2023-11-29 00:51:23,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:51:23,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:51:23,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:51:24,097 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 00:51:24,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:51:24,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838239711] [2023-11-29 00:51:24,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838239711] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:51:24,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:51:24,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 00:51:24,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337194474] [2023-11-29 00:51:24,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:51:24,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:51:24,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:51:24,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:51:24,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:51:24,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 00:51:24,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 27 transitions, 136 flow. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:51:24,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:51:24,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 00:51:24,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:51:24,246 INFO L124 PetriNetUnfolderBase]: 103/204 cut-off events. [2023-11-29 00:51:24,246 INFO L125 PetriNetUnfolderBase]: For 302/302 co-relation queries the response was YES. [2023-11-29 00:51:24,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 707 conditions, 204 events. 103/204 cut-off events. For 302/302 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 693 event pairs, 26 based on Foata normal form. 2/205 useless extension candidates. Maximal degree in co-relation 684. Up to 107 conditions per place. [2023-11-29 00:51:24,249 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 33 selfloop transitions, 9 changer transitions 10/53 dead transitions. [2023-11-29 00:51:24,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 53 transitions, 355 flow [2023-11-29 00:51:24,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 00:51:24,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 00:51:24,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 63 transitions. [2023-11-29 00:51:24,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-11-29 00:51:24,250 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 63 transitions. [2023-11-29 00:51:24,250 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 63 transitions. [2023-11-29 00:51:24,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:51:24,251 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 63 transitions. [2023-11-29 00:51:24,251 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states 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 00:51:24,252 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 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 00:51:24,252 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 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 00:51:24,252 INFO L175 Difference]: Start difference. First operand has 35 places, 27 transitions, 136 flow. Second operand 6 states and 63 transitions. [2023-11-29 00:51:24,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 53 transitions, 355 flow [2023-11-29 00:51:24,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 53 transitions, 350 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 00:51:24,256 INFO L231 Difference]: Finished difference. Result has 41 places, 30 transitions, 193 flow [2023-11-29 00:51:24,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=193, PETRI_PLACES=41, PETRI_TRANSITIONS=30} [2023-11-29 00:51:24,257 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 19 predicate places. [2023-11-29 00:51:24,258 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 30 transitions, 193 flow [2023-11-29 00:51:24,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:51:24,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:51:24,258 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:51:24,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-29 00:51:24,258 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 00:51:24,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:51:24,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1401451265, now seen corresponding path program 3 times [2023-11-29 00:51:24,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:51:24,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512038855] [2023-11-29 00:51:24,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:51:24,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:51:24,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:51:24,392 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:51:24,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:51:24,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512038855] [2023-11-29 00:51:24,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512038855] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:51:24,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523345410] [2023-11-29 00:51:24,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 00:51:24,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:51:24,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3119035f-5ca6-4d34-acbf-736492195747/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:51:24,395 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3119035f-5ca6-4d34-acbf-736492195747/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:51:24,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3119035f-5ca6-4d34-acbf-736492195747/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 00:51:24,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 00:51:24,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:51:24,516 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 00:51:24,518 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:51:24,551 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:51:24,551 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:51:24,600 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:51:24,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523345410] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:51:24,600 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:51:24,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-11-29 00:51:24,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207486317] [2023-11-29 00:51:24,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:51:24,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 00:51:24,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:51:24,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 00:51:24,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-11-29 00:51:24,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 00:51:24,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 30 transitions, 193 flow. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states 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 00:51:24,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:51:24,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 00:51:24,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:51:24,766 INFO L124 PetriNetUnfolderBase]: 114/225 cut-off events. [2023-11-29 00:51:24,766 INFO L125 PetriNetUnfolderBase]: For 467/467 co-relation queries the response was YES. [2023-11-29 00:51:24,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 891 conditions, 225 events. 114/225 cut-off events. For 467/467 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 745 event pairs, 38 based on Foata normal form. 6/230 useless extension candidates. Maximal degree in co-relation 866. Up to 145 conditions per place. [2023-11-29 00:51:24,769 INFO L140 encePairwiseOnDemand]: 16/21 looper letters, 36 selfloop transitions, 13 changer transitions 4/54 dead transitions. [2023-11-29 00:51:24,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 54 transitions, 419 flow [2023-11-29 00:51:24,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:51:24,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 00:51:24,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 57 transitions. [2023-11-29 00:51:24,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2023-11-29 00:51:24,771 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 57 transitions. [2023-11-29 00:51:24,771 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 57 transitions. [2023-11-29 00:51:24,771 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:51:24,771 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 57 transitions. [2023-11-29 00:51:24,772 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states 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 00:51:24,772 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states 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 00:51:24,773 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states 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 00:51:24,773 INFO L175 Difference]: Start difference. First operand has 41 places, 30 transitions, 193 flow. Second operand 5 states and 57 transitions. [2023-11-29 00:51:24,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 54 transitions, 419 flow [2023-11-29 00:51:24,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 54 transitions, 397 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-29 00:51:24,777 INFO L231 Difference]: Finished difference. Result has 45 places, 36 transitions, 277 flow [2023-11-29 00:51:24,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=277, PETRI_PLACES=45, PETRI_TRANSITIONS=36} [2023-11-29 00:51:24,778 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 23 predicate places. [2023-11-29 00:51:24,778 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 36 transitions, 277 flow [2023-11-29 00:51:24,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states 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 00:51:24,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:51:24,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:51:24,785 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3119035f-5ca6-4d34-acbf-736492195747/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 00:51:24,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3119035f-5ca6-4d34-acbf-736492195747/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-29 00:51:24,980 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 00:51:24,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:51:24,980 INFO L85 PathProgramCache]: Analyzing trace with hash -491136274, now seen corresponding path program 3 times [2023-11-29 00:51:24,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:51:24,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103622871] [2023-11-29 00:51:24,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:51:24,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:51:25,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:51:25,098 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 00:51:25,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:51:25,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103622871] [2023-11-29 00:51:25,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103622871] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:51:25,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:51:25,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 00:51:25,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083960906] [2023-11-29 00:51:25,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:51:25,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:51:25,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:51:25,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:51:25,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:51:25,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 00:51:25,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 36 transitions, 277 flow. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states 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 00:51:25,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:51:25,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 00:51:25,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:51:25,202 INFO L124 PetriNetUnfolderBase]: 114/218 cut-off events. [2023-11-29 00:51:25,202 INFO L125 PetriNetUnfolderBase]: For 652/652 co-relation queries the response was YES. [2023-11-29 00:51:25,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 984 conditions, 218 events. 114/218 cut-off events. For 652/652 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 704 event pairs, 34 based on Foata normal form. 4/221 useless extension candidates. Maximal degree in co-relation 956. Up to 149 conditions per place. [2023-11-29 00:51:25,205 INFO L140 encePairwiseOnDemand]: 17/21 looper letters, 31 selfloop transitions, 12 changer transitions 4/48 dead transitions. [2023-11-29 00:51:25,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 48 transitions, 433 flow [2023-11-29 00:51:25,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:51:25,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 00:51:25,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 45 transitions. [2023-11-29 00:51:25,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2023-11-29 00:51:25,206 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 45 transitions. [2023-11-29 00:51:25,207 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 45 transitions. [2023-11-29 00:51:25,207 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:51:25,207 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 45 transitions. [2023-11-29 00:51:25,207 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states 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 00:51:25,208 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 0 states have call successors, (0), 0 states 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 00:51:25,208 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 0 states have call successors, (0), 0 states 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 00:51:25,208 INFO L175 Difference]: Start difference. First operand has 45 places, 36 transitions, 277 flow. Second operand 4 states and 45 transitions. [2023-11-29 00:51:25,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 48 transitions, 433 flow [2023-11-29 00:51:25,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 48 transitions, 414 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-11-29 00:51:25,213 INFO L231 Difference]: Finished difference. Result has 48 places, 37 transitions, 305 flow [2023-11-29 00:51:25,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=305, PETRI_PLACES=48, PETRI_TRANSITIONS=37} [2023-11-29 00:51:25,214 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 26 predicate places. [2023-11-29 00:51:25,214 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 37 transitions, 305 flow [2023-11-29 00:51:25,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states 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 00:51:25,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:51:25,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:51:25,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-29 00:51:25,215 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 00:51:25,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:51:25,215 INFO L85 PathProgramCache]: Analyzing trace with hash -107225049, now seen corresponding path program 4 times [2023-11-29 00:51:25,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:51:25,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808868168] [2023-11-29 00:51:25,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:51:25,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:51:25,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:51:25,337 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 00:51:25,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:51:25,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808868168] [2023-11-29 00:51:25,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808868168] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:51:25,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:51:25,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 00:51:25,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191206300] [2023-11-29 00:51:25,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:51:25,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:51:25,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:51:25,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:51:25,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:51:25,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 00:51:25,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 37 transitions, 305 flow. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:51:25,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:51:25,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 00:51:25,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:51:25,468 INFO L124 PetriNetUnfolderBase]: 100/182 cut-off events. [2023-11-29 00:51:25,468 INFO L125 PetriNetUnfolderBase]: For 703/703 co-relation queries the response was YES. [2023-11-29 00:51:25,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 862 conditions, 182 events. 100/182 cut-off events. For 703/703 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 518 event pairs, 31 based on Foata normal form. 4/185 useless extension candidates. Maximal degree in co-relation 833. Up to 130 conditions per place. [2023-11-29 00:51:25,471 INFO L140 encePairwiseOnDemand]: 16/21 looper letters, 32 selfloop transitions, 9 changer transitions 4/46 dead transitions. [2023-11-29 00:51:25,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 46 transitions, 440 flow [2023-11-29 00:51:25,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:51:25,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 00:51:25,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 45 transitions. [2023-11-29 00:51:25,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2023-11-29 00:51:25,473 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 45 transitions. [2023-11-29 00:51:25,473 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 45 transitions. [2023-11-29 00:51:25,473 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:51:25,473 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 45 transitions. [2023-11-29 00:51:25,473 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states 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 00:51:25,474 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states 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 00:51:25,474 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states 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 00:51:25,474 INFO L175 Difference]: Start difference. First operand has 48 places, 37 transitions, 305 flow. Second operand 5 states and 45 transitions. [2023-11-29 00:51:25,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 46 transitions, 440 flow [2023-11-29 00:51:25,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 46 transitions, 420 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-11-29 00:51:25,480 INFO L231 Difference]: Finished difference. Result has 51 places, 37 transitions, 321 flow [2023-11-29 00:51:25,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=321, PETRI_PLACES=51, PETRI_TRANSITIONS=37} [2023-11-29 00:51:25,481 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 29 predicate places. [2023-11-29 00:51:25,481 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 37 transitions, 321 flow [2023-11-29 00:51:25,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:51:25,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:51:25,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:51:25,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-29 00:51:25,481 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 00:51:25,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:51:25,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1474385269, now seen corresponding path program 1 times [2023-11-29 00:51:25,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:51:25,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484865817] [2023-11-29 00:51:25,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:51:25,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:51:25,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:51:26,024 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:51:26,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:51:26,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484865817] [2023-11-29 00:51:26,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484865817] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:51:26,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588519718] [2023-11-29 00:51:26,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:51:26,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:51:26,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3119035f-5ca6-4d34-acbf-736492195747/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:51:26,026 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3119035f-5ca6-4d34-acbf-736492195747/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:51:26,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3119035f-5ca6-4d34-acbf-736492195747/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 00:51:26,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:51:26,131 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-29 00:51:26,133 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:51:26,201 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 00:51:26,401 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:51:26,401 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 41 [2023-11-29 00:51:26,450 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:51:26,450 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:51:26,835 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 132 treesize of output 116 [2023-11-29 00:51:27,003 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:51:27,004 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 15 case distinctions, treesize of input 765 treesize of output 645 [2023-11-29 00:51:49,799 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:51:49,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588519718] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:51:49,799 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:51:49,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 17 [2023-11-29 00:51:49,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172065716] [2023-11-29 00:51:49,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:51:49,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 00:51:49,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:51:49,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 00:51:49,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2023-11-29 00:51:49,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 00:51:49,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 37 transitions, 321 flow. Second operand has 17 states, 17 states have (on average 5.705882352941177) internal successors, (97), 17 states have internal predecessors, (97), 0 states have call successors, (0), 0 states 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 00:51:49,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:51:49,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 00:51:49,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:51:57,195 INFO L124 PetriNetUnfolderBase]: 309/558 cut-off events. [2023-11-29 00:51:57,195 INFO L125 PetriNetUnfolderBase]: For 1883/1883 co-relation queries the response was YES. [2023-11-29 00:51:57,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2645 conditions, 558 events. 309/558 cut-off events. For 1883/1883 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2363 event pairs, 14 based on Foata normal form. 10/566 useless extension candidates. Maximal degree in co-relation 2582. Up to 237 conditions per place. [2023-11-29 00:51:57,201 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 58 selfloop transitions, 27 changer transitions 93/179 dead transitions. [2023-11-29 00:51:57,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 179 transitions, 1541 flow [2023-11-29 00:51:57,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-29 00:51:57,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-29 00:51:57,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 245 transitions. [2023-11-29 00:51:57,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40229885057471265 [2023-11-29 00:51:57,204 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 245 transitions. [2023-11-29 00:51:57,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 245 transitions. [2023-11-29 00:51:57,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:51:57,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 245 transitions. [2023-11-29 00:51:57,205 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 8.448275862068966) internal successors, (245), 29 states have internal predecessors, (245), 0 states have call successors, (0), 0 states 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 00:51:57,208 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 21.0) internal successors, (630), 30 states have internal predecessors, (630), 0 states have call successors, (0), 0 states 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 00:51:57,208 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 21.0) internal successors, (630), 30 states have internal predecessors, (630), 0 states have call successors, (0), 0 states 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 00:51:57,208 INFO L175 Difference]: Start difference. First operand has 51 places, 37 transitions, 321 flow. Second operand 29 states and 245 transitions. [2023-11-29 00:51:57,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 179 transitions, 1541 flow [2023-11-29 00:51:57,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 179 transitions, 1433 flow, removed 20 selfloop flow, removed 4 redundant places. [2023-11-29 00:51:57,221 INFO L231 Difference]: Finished difference. Result has 87 places, 49 transitions, 509 flow [2023-11-29 00:51:57,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=509, PETRI_PLACES=87, PETRI_TRANSITIONS=49} [2023-11-29 00:51:57,222 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 65 predicate places. [2023-11-29 00:51:57,222 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 49 transitions, 509 flow [2023-11-29 00:51:57,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.705882352941177) internal successors, (97), 17 states have internal predecessors, (97), 0 states have call successors, (0), 0 states 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 00:51:57,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:51:57,223 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:51:57,229 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3119035f-5ca6-4d34-acbf-736492195747/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 00:51:57,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3119035f-5ca6-4d34-acbf-736492195747/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 00:51:57,428 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 00:51:57,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:51:57,428 INFO L85 PathProgramCache]: Analyzing trace with hash -839814674, now seen corresponding path program 2 times [2023-11-29 00:51:57,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:51:57,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317526288] [2023-11-29 00:51:57,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:51:57,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:51:57,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:51:58,131 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:51:58,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:51:58,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317526288] [2023-11-29 00:51:58,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317526288] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:51:58,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365263833] [2023-11-29 00:51:58,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:51:58,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:51:58,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3119035f-5ca6-4d34-acbf-736492195747/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:51:58,133 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3119035f-5ca6-4d34-acbf-736492195747/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:51:58,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3119035f-5ca6-4d34-acbf-736492195747/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 00:51:58,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:51:58,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:51:58,235 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-29 00:51:58,237 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:51:58,351 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 00:51:58,522 INFO L349 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2023-11-29 00:51:58,522 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 40 [2023-11-29 00:51:58,585 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:51:58,585 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:51:58,944 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 170 treesize of output 150 [2023-11-29 00:51:59,060 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:51:59,060 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 15 case distinctions, treesize of input 572 treesize of output 488 [2023-11-29 00:52:54,109 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:52:54,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365263833] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:52:54,109 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:52:54,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 20 [2023-11-29 00:52:54,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191616142] [2023-11-29 00:52:54,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:52:54,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 00:52:54,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:52:54,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 00:52:54,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2023-11-29 00:52:54,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 00:52:54,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 49 transitions, 509 flow. Second operand has 20 states, 20 states have (on average 5.65) internal successors, (113), 20 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:52:54,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:52:54,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 00:52:54,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:52:59,167 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:53:11,164 INFO L124 PetriNetUnfolderBase]: 283/504 cut-off events. [2023-11-29 00:53:11,164 INFO L125 PetriNetUnfolderBase]: For 3080/3080 co-relation queries the response was YES. [2023-11-29 00:53:11,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3068 conditions, 504 events. 283/504 cut-off events. For 3080/3080 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1988 event pairs, 14 based on Foata normal form. 33/537 useless extension candidates. Maximal degree in co-relation 3027. Up to 227 conditions per place. [2023-11-29 00:53:11,169 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 80 selfloop transitions, 54 changer transitions 1/136 dead transitions. [2023-11-29 00:53:11,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 136 transitions, 1486 flow [2023-11-29 00:53:11,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 00:53:11,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-29 00:53:11,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 184 transitions. [2023-11-29 00:53:11,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39826839826839827 [2023-11-29 00:53:11,171 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 184 transitions. [2023-11-29 00:53:11,171 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 184 transitions. [2023-11-29 00:53:11,171 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:53:11,171 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 184 transitions. [2023-11-29 00:53:11,172 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 8.363636363636363) internal successors, (184), 22 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:53:11,173 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 21.0) internal successors, (483), 23 states have internal predecessors, (483), 0 states have call successors, (0), 0 states 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 00:53:11,173 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 21.0) internal successors, (483), 23 states have internal predecessors, (483), 0 states have call successors, (0), 0 states 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 00:53:11,173 INFO L175 Difference]: Start difference. First operand has 87 places, 49 transitions, 509 flow. Second operand 22 states and 184 transitions. [2023-11-29 00:53:11,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 136 transitions, 1486 flow [2023-11-29 00:53:11,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 136 transitions, 1234 flow, removed 96 selfloop flow, removed 16 redundant places. [2023-11-29 00:53:11,183 INFO L231 Difference]: Finished difference. Result has 80 places, 78 transitions, 872 flow [2023-11-29 00:53:11,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=357, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=872, PETRI_PLACES=80, PETRI_TRANSITIONS=78} [2023-11-29 00:53:11,184 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 58 predicate places. [2023-11-29 00:53:11,184 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 78 transitions, 872 flow [2023-11-29 00:53:11,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.65) internal successors, (113), 20 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:53:11,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:53:11,184 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:53:11,189 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3119035f-5ca6-4d34-acbf-736492195747/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 00:53:11,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3119035f-5ca6-4d34-acbf-736492195747/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:53:11,385 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 00:53:11,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:53:11,385 INFO L85 PathProgramCache]: Analyzing trace with hash -2041208001, now seen corresponding path program 3 times [2023-11-29 00:53:11,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:53:11,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086340782] [2023-11-29 00:53:11,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:53:11,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:53:11,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:53:11,648 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:53:11,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:53:11,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086340782] [2023-11-29 00:53:11,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086340782] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:53:11,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086004684] [2023-11-29 00:53:11,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 00:53:11,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:53:11,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3119035f-5ca6-4d34-acbf-736492195747/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:53:11,650 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3119035f-5ca6-4d34-acbf-736492195747/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:53:11,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3119035f-5ca6-4d34-acbf-736492195747/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 00:53:11,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 00:53:11,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:53:11,817 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 00:53:11,819 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:53:11,882 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:53:11,882 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:53:12,240 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:53:12,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086004684] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:53:12,241 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:53:12,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-29 00:53:12,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358878466] [2023-11-29 00:53:12,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:53:12,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 00:53:12,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:53:12,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 00:53:12,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-11-29 00:53:12,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 00:53:12,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 78 transitions, 872 flow. Second operand has 12 states, 12 states have (on average 5.5) internal successors, (66), 12 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 00:53:12,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:53:12,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 00:53:12,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:53:21,068 WARN L293 SmtUtils]: Spent 8.18s on a formula simplification that was a NOOP. DAG size: 50 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 00:53:22,731 INFO L124 PetriNetUnfolderBase]: 383/674 cut-off events. [2023-11-29 00:53:22,731 INFO L125 PetriNetUnfolderBase]: For 4076/4076 co-relation queries the response was YES. [2023-11-29 00:53:22,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4013 conditions, 674 events. 383/674 cut-off events. For 4076/4076 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2748 event pairs, 29 based on Foata normal form. 64/738 useless extension candidates. Maximal degree in co-relation 3760. Up to 329 conditions per place. [2023-11-29 00:53:22,738 INFO L140 encePairwiseOnDemand]: 16/21 looper letters, 110 selfloop transitions, 44 changer transitions 0/155 dead transitions. [2023-11-29 00:53:22,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 155 transitions, 1895 flow [2023-11-29 00:53:22,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 00:53:22,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-29 00:53:22,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 110 transitions. [2023-11-29 00:53:22,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2023-11-29 00:53:22,741 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 110 transitions. [2023-11-29 00:53:22,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 110 transitions. [2023-11-29 00:53:22,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:53:22,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 110 transitions. [2023-11-29 00:53:22,741 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 10.0) internal successors, (110), 11 states have internal predecessors, (110), 0 states have call successors, (0), 0 states 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 00:53:22,742 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 21.0) internal successors, (252), 12 states have internal predecessors, (252), 0 states have call successors, (0), 0 states 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 00:53:22,742 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 21.0) internal successors, (252), 12 states have internal predecessors, (252), 0 states have call successors, (0), 0 states 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 00:53:22,743 INFO L175 Difference]: Start difference. First operand has 80 places, 78 transitions, 872 flow. Second operand 11 states and 110 transitions. [2023-11-29 00:53:22,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 155 transitions, 1895 flow [2023-11-29 00:53:22,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 155 transitions, 1743 flow, removed 45 selfloop flow, removed 9 redundant places. [2023-11-29 00:53:22,758 INFO L231 Difference]: Finished difference. Result has 85 places, 89 transitions, 1010 flow [2023-11-29 00:53:22,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=730, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1010, PETRI_PLACES=85, PETRI_TRANSITIONS=89} [2023-11-29 00:53:22,759 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 63 predicate places. [2023-11-29 00:53:22,759 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 89 transitions, 1010 flow [2023-11-29 00:53:22,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.5) internal successors, (66), 12 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 00:53:22,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:53:22,759 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:53:22,764 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3119035f-5ca6-4d34-acbf-736492195747/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-29 00:53:22,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3119035f-5ca6-4d34-acbf-736492195747/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:53:22,964 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 00:53:22,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:53:22,964 INFO L85 PathProgramCache]: Analyzing trace with hash -464337496, now seen corresponding path program 4 times [2023-11-29 00:53:22,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:53:22,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484538938] [2023-11-29 00:53:22,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:53:22,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:53:23,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:53:24,771 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:53:24,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:53:24,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484538938] [2023-11-29 00:53:24,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484538938] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:53:24,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719019301] [2023-11-29 00:53:24,771 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 00:53:24,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:53:24,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3119035f-5ca6-4d34-acbf-736492195747/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:53:24,772 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3119035f-5ca6-4d34-acbf-736492195747/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:53:24,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3119035f-5ca6-4d34-acbf-736492195747/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 00:53:24,890 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 00:53:24,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:53:24,892 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-29 00:53:24,895 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:53:25,119 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:53:25,119 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 41 [2023-11-29 00:53:25,130 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:53:25,130 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:53:25,416 INFO L349 Elim1Store]: treesize reduction 15, result has 90.2 percent of original size [2023-11-29 00:53:25,416 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 173 [2023-11-29 00:53:25,685 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 00:53:25,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719019301] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:53:25,686 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:53:25,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 5] total 18 [2023-11-29 00:53:25,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905474809] [2023-11-29 00:53:25,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:53:25,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 00:53:25,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:53:25,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 00:53:25,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2023-11-29 00:53:25,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 00:53:25,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 89 transitions, 1010 flow. Second operand has 19 states, 19 states have (on average 5.578947368421052) internal successors, (106), 19 states have internal predecessors, (106), 0 states have call successors, (0), 0 states 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 00:53:25,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:53:25,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 00:53:25,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:53:27,133 INFO L124 PetriNetUnfolderBase]: 707/1258 cut-off events. [2023-11-29 00:53:27,133 INFO L125 PetriNetUnfolderBase]: For 9966/9966 co-relation queries the response was YES. [2023-11-29 00:53:27,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7962 conditions, 1258 events. 707/1258 cut-off events. For 9966/9966 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 5805 event pairs, 78 based on Foata normal form. 4/1262 useless extension candidates. Maximal degree in co-relation 7919. Up to 610 conditions per place. [2023-11-29 00:53:27,149 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 123 selfloop transitions, 84 changer transitions 2/210 dead transitions. [2023-11-29 00:53:27,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 210 transitions, 2613 flow [2023-11-29 00:53:27,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-29 00:53:27,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-29 00:53:27,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 183 transitions. [2023-11-29 00:53:27,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4357142857142857 [2023-11-29 00:53:27,152 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 183 transitions. [2023-11-29 00:53:27,152 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 183 transitions. [2023-11-29 00:53:27,152 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:53:27,152 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 183 transitions. [2023-11-29 00:53:27,154 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 9.15) internal successors, (183), 20 states have internal predecessors, (183), 0 states have call successors, (0), 0 states 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 00:53:27,155 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 21.0) internal successors, (441), 21 states have internal predecessors, (441), 0 states have call successors, (0), 0 states 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 00:53:27,156 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 21.0) internal successors, (441), 21 states have internal predecessors, (441), 0 states have call successors, (0), 0 states 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 00:53:27,156 INFO L175 Difference]: Start difference. First operand has 85 places, 89 transitions, 1010 flow. Second operand 20 states and 183 transitions. [2023-11-29 00:53:27,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 210 transitions, 2613 flow [2023-11-29 00:53:27,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 210 transitions, 2336 flow, removed 112 selfloop flow, removed 4 redundant places. [2023-11-29 00:53:27,184 INFO L231 Difference]: Finished difference. Result has 105 places, 136 transitions, 1782 flow [2023-11-29 00:53:27,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=906, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1782, PETRI_PLACES=105, PETRI_TRANSITIONS=136} [2023-11-29 00:53:27,185 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 83 predicate places. [2023-11-29 00:53:27,185 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 136 transitions, 1782 flow [2023-11-29 00:53:27,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.578947368421052) internal successors, (106), 19 states have internal predecessors, (106), 0 states have call successors, (0), 0 states 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 00:53:27,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:53:27,186 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:53:27,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3119035f-5ca6-4d34-acbf-736492195747/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-29 00:53:27,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3119035f-5ca6-4d34-acbf-736492195747/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 00:53:27,386 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 00:53:27,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:53:27,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1226657878, now seen corresponding path program 5 times [2023-11-29 00:53:27,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:53:27,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707270335] [2023-11-29 00:53:27,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:53:27,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:53:27,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:53:28,803 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:53:28,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:53:28,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707270335] [2023-11-29 00:53:28,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707270335] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:53:28,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003417509] [2023-11-29 00:53:28,804 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 00:53:28,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:53:28,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3119035f-5ca6-4d34-acbf-736492195747/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:53:28,805 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3119035f-5ca6-4d34-acbf-736492195747/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:53:28,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3119035f-5ca6-4d34-acbf-736492195747/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 00:53:28,937 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-29 00:53:28,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:53:28,939 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-29 00:53:28,941 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:53:29,143 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:53:29,143 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 41 [2023-11-29 00:53:29,154 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:53:29,154 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:53:29,450 INFO L349 Elim1Store]: treesize reduction 15, result has 90.2 percent of original size [2023-11-29 00:53:29,451 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 173 [2023-11-29 00:53:29,718 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:53:29,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003417509] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:53:29,718 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:53:29,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 6] total 19 [2023-11-29 00:53:29,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17416296] [2023-11-29 00:53:29,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:53:29,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 00:53:29,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:53:29,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 00:53:29,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2023-11-29 00:53:29,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 00:53:29,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 136 transitions, 1782 flow. Second operand has 20 states, 20 states have (on average 5.45) internal successors, (109), 20 states have internal predecessors, (109), 0 states have call successors, (0), 0 states 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 00:53:29,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:53:29,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 00:53:29,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:53:30,912 INFO L124 PetriNetUnfolderBase]: 959/1711 cut-off events. [2023-11-29 00:53:30,913 INFO L125 PetriNetUnfolderBase]: For 14325/14325 co-relation queries the response was YES. [2023-11-29 00:53:30,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10899 conditions, 1711 events. 959/1711 cut-off events. For 14325/14325 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 8474 event pairs, 158 based on Foata normal form. 3/1714 useless extension candidates. Maximal degree in co-relation 10848. Up to 1180 conditions per place. [2023-11-29 00:53:30,934 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 154 selfloop transitions, 74 changer transitions 1/230 dead transitions. [2023-11-29 00:53:30,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 230 transitions, 3124 flow [2023-11-29 00:53:30,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 00:53:30,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-29 00:53:30,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 163 transitions. [2023-11-29 00:53:30,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40852130325814534 [2023-11-29 00:53:30,937 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 163 transitions. [2023-11-29 00:53:30,938 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 163 transitions. [2023-11-29 00:53:30,938 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:53:30,938 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 163 transitions. [2023-11-29 00:53:30,939 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 8.578947368421053) internal successors, (163), 19 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:53:30,941 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 21.0) internal successors, (420), 20 states have internal predecessors, (420), 0 states have call successors, (0), 0 states 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 00:53:30,941 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 21.0) internal successors, (420), 20 states have internal predecessors, (420), 0 states have call successors, (0), 0 states 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 00:53:30,941 INFO L175 Difference]: Start difference. First operand has 105 places, 136 transitions, 1782 flow. Second operand 19 states and 163 transitions. [2023-11-29 00:53:30,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 230 transitions, 3124 flow [2023-11-29 00:53:30,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 230 transitions, 2765 flow, removed 161 selfloop flow, removed 8 redundant places. [2023-11-29 00:53:30,987 INFO L231 Difference]: Finished difference. Result has 119 places, 172 transitions, 2219 flow [2023-11-29 00:53:30,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=1479, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2219, PETRI_PLACES=119, PETRI_TRANSITIONS=172} [2023-11-29 00:53:30,989 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 97 predicate places. [2023-11-29 00:53:30,989 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 172 transitions, 2219 flow [2023-11-29 00:53:30,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.45) internal successors, (109), 20 states have internal predecessors, (109), 0 states have call successors, (0), 0 states 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 00:53:30,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:53:30,989 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:53:30,995 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3119035f-5ca6-4d34-acbf-736492195747/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 00:53:31,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3119035f-5ca6-4d34-acbf-736492195747/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 00:53:31,192 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 00:53:31,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:53:31,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1868758288, now seen corresponding path program 6 times [2023-11-29 00:53:31,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:53:31,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184353045] [2023-11-29 00:53:31,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:53:31,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:53:31,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:53:32,270 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:53:32,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:53:32,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184353045] [2023-11-29 00:53:32,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184353045] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:53:32,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843675079] [2023-11-29 00:53:32,271 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 00:53:32,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:53:32,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3119035f-5ca6-4d34-acbf-736492195747/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:53:32,272 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3119035f-5ca6-4d34-acbf-736492195747/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:53:32,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3119035f-5ca6-4d34-acbf-736492195747/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 00:53:32,385 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-29 00:53:32,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:53:32,387 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-29 00:53:32,390 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:53:32,584 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:53:32,584 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 41 [2023-11-29 00:53:32,594 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:53:32,595 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:53:32,826 INFO L349 Elim1Store]: treesize reduction 15, result has 90.2 percent of original size [2023-11-29 00:53:32,826 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 173 [2023-11-29 00:53:33,021 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:53:33,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843675079] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:53:33,021 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:53:33,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 5] total 18 [2023-11-29 00:53:33,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633671315] [2023-11-29 00:53:33,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:53:33,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 00:53:33,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:53:33,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 00:53:33,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2023-11-29 00:53:33,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 00:53:33,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 172 transitions, 2219 flow. Second operand has 19 states, 19 states have (on average 5.578947368421052) internal successors, (106), 19 states have internal predecessors, (106), 0 states have call successors, (0), 0 states 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 00:53:33,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:53:33,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 00:53:33,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:53:34,353 INFO L124 PetriNetUnfolderBase]: 1489/2665 cut-off events. [2023-11-29 00:53:34,353 INFO L125 PetriNetUnfolderBase]: For 17978/17978 co-relation queries the response was YES. [2023-11-29 00:53:34,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15836 conditions, 2665 events. 1489/2665 cut-off events. For 17978/17978 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 14932 event pairs, 244 based on Foata normal form. 5/2670 useless extension candidates. Maximal degree in co-relation 15780. Up to 1555 conditions per place. [2023-11-29 00:53:34,387 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 205 selfloop transitions, 110 changer transitions 2/318 dead transitions. [2023-11-29 00:53:34,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 318 transitions, 4351 flow [2023-11-29 00:53:34,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-29 00:53:34,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-29 00:53:34,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 184 transitions. [2023-11-29 00:53:34,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41723356009070295 [2023-11-29 00:53:34,390 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 184 transitions. [2023-11-29 00:53:34,390 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 184 transitions. [2023-11-29 00:53:34,390 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:53:34,391 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 184 transitions. [2023-11-29 00:53:34,392 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 8.761904761904763) internal successors, (184), 21 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:53:34,393 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 21.0) internal successors, (462), 22 states have internal predecessors, (462), 0 states have call successors, (0), 0 states 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 00:53:34,393 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 21.0) internal successors, (462), 22 states have internal predecessors, (462), 0 states have call successors, (0), 0 states 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 00:53:34,393 INFO L175 Difference]: Start difference. First operand has 119 places, 172 transitions, 2219 flow. Second operand 21 states and 184 transitions. [2023-11-29 00:53:34,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 318 transitions, 4351 flow [2023-11-29 00:53:34,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 318 transitions, 4059 flow, removed 121 selfloop flow, removed 10 redundant places. [2023-11-29 00:53:34,453 INFO L231 Difference]: Finished difference. Result has 136 places, 246 transitions, 3439 flow [2023-11-29 00:53:34,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=1961, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=3439, PETRI_PLACES=136, PETRI_TRANSITIONS=246} [2023-11-29 00:53:34,454 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 114 predicate places. [2023-11-29 00:53:34,454 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 246 transitions, 3439 flow [2023-11-29 00:53:34,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.578947368421052) internal successors, (106), 19 states have internal predecessors, (106), 0 states have call successors, (0), 0 states 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 00:53:34,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:53:34,454 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:53:34,459 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3119035f-5ca6-4d34-acbf-736492195747/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 00:53:34,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3119035f-5ca6-4d34-acbf-736492195747/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 00:53:34,655 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 00:53:34,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:53:34,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1254894055, now seen corresponding path program 7 times [2023-11-29 00:53:34,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:53:34,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914110465] [2023-11-29 00:53:34,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:53:34,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:53:34,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:53:37,744 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:53:37,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:53:37,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914110465] [2023-11-29 00:53:37,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914110465] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:53:37,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047288579] [2023-11-29 00:53:37,745 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 00:53:37,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:53:37,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3119035f-5ca6-4d34-acbf-736492195747/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:53:37,746 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3119035f-5ca6-4d34-acbf-736492195747/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:53:37,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3119035f-5ca6-4d34-acbf-736492195747/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 00:53:37,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:53:37,849 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-29 00:53:37,851 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:53:38,042 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:53:38,042 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 41 [2023-11-29 00:53:38,052 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:53:38,052 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:53:38,289 INFO L349 Elim1Store]: treesize reduction 15, result has 90.2 percent of original size [2023-11-29 00:53:38,290 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 173 [2023-11-29 00:53:38,477 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 00:53:38,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047288579] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:53:38,477 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:53:38,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 5] total 20 [2023-11-29 00:53:38,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335194640] [2023-11-29 00:53:38,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:53:38,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-29 00:53:38,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:53:38,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-29 00:53:38,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2023-11-29 00:53:38,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 00:53:38,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 246 transitions, 3439 flow. Second operand has 21 states, 21 states have (on average 5.428571428571429) internal successors, (114), 21 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:53:38,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:53:38,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 00:53:38,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:53:39,959 INFO L124 PetriNetUnfolderBase]: 1670/2993 cut-off events. [2023-11-29 00:53:39,959 INFO L125 PetriNetUnfolderBase]: For 23906/23906 co-relation queries the response was YES. [2023-11-29 00:53:39,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18653 conditions, 2993 events. 1670/2993 cut-off events. For 23906/23906 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 17183 event pairs, 412 based on Foata normal form. 2/2995 useless extension candidates. Maximal degree in co-relation 18186. Up to 2414 conditions per place. [2023-11-29 00:53:39,989 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 268 selfloop transitions, 84 changer transitions 1/354 dead transitions. [2023-11-29 00:53:39,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 354 transitions, 5129 flow [2023-11-29 00:53:39,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 00:53:39,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-29 00:53:39,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 173 transitions. [2023-11-29 00:53:39,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43358395989974935 [2023-11-29 00:53:39,990 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 173 transitions. [2023-11-29 00:53:39,990 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 173 transitions. [2023-11-29 00:53:39,991 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:53:39,991 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 173 transitions. [2023-11-29 00:53:39,991 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 9.105263157894736) internal successors, (173), 19 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 00:53:39,992 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 21.0) internal successors, (420), 20 states have internal predecessors, (420), 0 states have call successors, (0), 0 states 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 00:53:39,992 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 21.0) internal successors, (420), 20 states have internal predecessors, (420), 0 states have call successors, (0), 0 states 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 00:53:39,992 INFO L175 Difference]: Start difference. First operand has 136 places, 246 transitions, 3439 flow. Second operand 19 states and 173 transitions. [2023-11-29 00:53:39,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 354 transitions, 5129 flow [2023-11-29 00:53:40,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 354 transitions, 4727 flow, removed 182 selfloop flow, removed 7 redundant places. [2023-11-29 00:53:40,072 INFO L231 Difference]: Finished difference. Result has 151 places, 286 transitions, 3876 flow [2023-11-29 00:53:40,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=3045, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=3876, PETRI_PLACES=151, PETRI_TRANSITIONS=286} [2023-11-29 00:53:40,073 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 129 predicate places. [2023-11-29 00:53:40,073 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 286 transitions, 3876 flow [2023-11-29 00:53:40,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.428571428571429) internal successors, (114), 21 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:53:40,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:53:40,073 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:53:40,079 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3119035f-5ca6-4d34-acbf-736492195747/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 00:53:40,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3119035f-5ca6-4d34-acbf-736492195747/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:53:40,274 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 00:53:40,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:53:40,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1623972036, now seen corresponding path program 8 times [2023-11-29 00:53:40,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:53:40,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887575577] [2023-11-29 00:53:40,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:53:40,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:53:40,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:53:40,470 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:53:40,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:53:40,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887575577] [2023-11-29 00:53:40,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887575577] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:53:40,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235658102] [2023-11-29 00:53:40,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:53:40,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:53:40,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3119035f-5ca6-4d34-acbf-736492195747/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:53:40,472 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3119035f-5ca6-4d34-acbf-736492195747/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:53:40,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3119035f-5ca6-4d34-acbf-736492195747/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 00:53:40,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:53:40,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:53:40,586 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 00:53:40,587 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:53:40,685 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:53:40,685 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:53:45,740 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_z_7 Int)) (or (< v_z_7 0) (< (mod |c_thread1Thread1of1ForFork0_~i~0#1| 4294967296) v_z_7) (< 0 (+ (div (* 8589934593 v_z_7) 4294967296) (div (+ 3 (* (- 8589934593) v_z_7)) 4294967296) 1)))) is different from false [2023-11-29 00:53:46,038 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 3 not checked. [2023-11-29 00:53:46,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235658102] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:53:46,039 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:53:46,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-11-29 00:53:46,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847671465] [2023-11-29 00:53:46,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:53:46,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 00:53:46,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:53:46,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 00:53:46,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=169, Unknown=1, NotChecked=26, Total=240 [2023-11-29 00:53:46,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 00:53:46,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 286 transitions, 3876 flow. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 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 00:53:46,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:53:46,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 00:53:46,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:53:50,190 WARN L854 $PredicateComparison]: unable to prove that (and (forall ((v_z_7 Int)) (or (< v_z_7 0) (< (mod |c_thread1Thread1of1ForFork0_~i~0#1| 4294967296) v_z_7) (< 0 (+ (div (* 8589934593 v_z_7) 4294967296) (div (+ 3 (* (- 8589934593) v_z_7)) 4294967296) 1)))) (<= 0 (div (+ (* (- 1) |c_thread1Thread1of1ForFork0_~i~0#1|) 1) 4294967296)) (<= 1 |c_thread1Thread1of1ForFork0_~i~0#1|)) is different from false [2023-11-29 00:53:54,234 WARN L854 $PredicateComparison]: unable to prove that (and (forall ((v_z_7 Int)) (or (< v_z_7 0) (< (mod |c_thread1Thread1of1ForFork0_~i~0#1| 4294967296) v_z_7) (< 0 (+ (div (* 8589934593 v_z_7) 4294967296) (div (+ 3 (* (- 8589934593) v_z_7)) 4294967296) 1)))) (<= 0 (div (+ (* (- 1) |c_thread1Thread1of1ForFork0_~i~0#1|) 2) 4294967296)) (<= 2 |c_thread1Thread1of1ForFork0_~i~0#1|)) is different from false [2023-11-29 00:53:58,300 WARN L854 $PredicateComparison]: unable to prove that (and (forall ((v_z_7 Int)) (or (< v_z_7 0) (< (mod |c_thread1Thread1of1ForFork0_~i~0#1| 4294967296) v_z_7) (< 0 (+ (div (* 8589934593 v_z_7) 4294967296) (div (+ 3 (* (- 8589934593) v_z_7)) 4294967296) 1)))) (<= 0 (div (+ (* (- 1) |c_thread1Thread1of1ForFork0_~i~0#1|) 3) 4294967296)) (<= 3 |c_thread1Thread1of1ForFork0_~i~0#1|)) is different from false [2023-11-29 00:54:02,531 WARN L854 $PredicateComparison]: unable to prove that (and (forall ((v_z_7 Int)) (or (< v_z_7 0) (< (mod |c_thread1Thread1of1ForFork0_~i~0#1| 4294967296) v_z_7) (< 0 (+ (div (* 8589934593 v_z_7) 4294967296) (div (+ 3 (* (- 8589934593) v_z_7)) 4294967296) 1)))) (let ((.cse0 (* 3 c_~n~0))) (< (+ (* (div |c_thread2Thread1of1ForFork1_~i~1#1| 4294967296) 4294967296) .cse0) (+ (* (div .cse0 4294967296) 4294967296) |c_thread2Thread1of1ForFork1_~i~1#1| 1))) (<= 0 (div (+ (* (- 1) |c_thread1Thread1of1ForFork0_~i~0#1|) 1) 4294967296)) (<= 1 |c_thread1Thread1of1ForFork0_~i~0#1|)) is different from false [2023-11-29 00:54:03,440 INFO L124 PetriNetUnfolderBase]: 1855/3497 cut-off events. [2023-11-29 00:54:03,440 INFO L125 PetriNetUnfolderBase]: For 29897/29897 co-relation queries the response was YES. [2023-11-29 00:54:03,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20857 conditions, 3497 events. 1855/3497 cut-off events. For 29897/29897 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 22795 event pairs, 302 based on Foata normal form. 32/3529 useless extension candidates. Maximal degree in co-relation 20249. Up to 1749 conditions per place. [2023-11-29 00:54:03,467 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 416 selfloop transitions, 106 changer transitions 17/540 dead transitions. [2023-11-29 00:54:03,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 540 transitions, 7964 flow [2023-11-29 00:54:03,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 00:54:03,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-29 00:54:03,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 132 transitions. [2023-11-29 00:54:03,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489795918367347 [2023-11-29 00:54:03,469 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 132 transitions. [2023-11-29 00:54:03,469 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 132 transitions. [2023-11-29 00:54:03,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:54:03,470 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 132 transitions. [2023-11-29 00:54:03,470 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 9.428571428571429) internal successors, (132), 14 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:54:03,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 21.0) internal successors, (315), 15 states have internal predecessors, (315), 0 states have call successors, (0), 0 states 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 00:54:03,471 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 21.0) internal successors, (315), 15 states have internal predecessors, (315), 0 states have call successors, (0), 0 states 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 00:54:03,471 INFO L175 Difference]: Start difference. First operand has 151 places, 286 transitions, 3876 flow. Second operand 14 states and 132 transitions. [2023-11-29 00:54:03,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 540 transitions, 7964 flow [2023-11-29 00:54:03,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 540 transitions, 7602 flow, removed 166 selfloop flow, removed 5 redundant places. [2023-11-29 00:54:03,552 INFO L231 Difference]: Finished difference. Result has 167 places, 371 transitions, 5105 flow [2023-11-29 00:54:03,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=3648, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=5105, PETRI_PLACES=167, PETRI_TRANSITIONS=371} [2023-11-29 00:54:03,552 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 145 predicate places. [2023-11-29 00:54:03,553 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 371 transitions, 5105 flow [2023-11-29 00:54:03,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 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 00:54:03,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:54:03,553 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:54:03,558 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3119035f-5ca6-4d34-acbf-736492195747/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 00:54:03,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3119035f-5ca6-4d34-acbf-736492195747/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 00:54:03,754 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 00:54:03,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:54:03,754 INFO L85 PathProgramCache]: Analyzing trace with hash -152035348, now seen corresponding path program 9 times [2023-11-29 00:54:03,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:54:03,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583165436] [2023-11-29 00:54:03,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:54:03,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:54:03,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:54:03,945 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:54:03,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:54:03,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583165436] [2023-11-29 00:54:03,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583165436] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:54:03,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557791140] [2023-11-29 00:54:03,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 00:54:03,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:54:03,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3119035f-5ca6-4d34-acbf-736492195747/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:54:03,946 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3119035f-5ca6-4d34-acbf-736492195747/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:54:03,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3119035f-5ca6-4d34-acbf-736492195747/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 00:54:04,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 00:54:04,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:54:04,095 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 00:54:04,096 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:54:04,206 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:54:04,206 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:54:09,468 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:54:09,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557791140] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:54:09,468 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:54:09,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-11-29 00:54:09,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591378755] [2023-11-29 00:54:09,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:54:09,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 00:54:09,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:54:09,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 00:54:09,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=245, Unknown=1, NotChecked=0, Total=306 [2023-11-29 00:54:09,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 00:54:09,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 371 transitions, 5105 flow. Second operand has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:54:09,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:54:09,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 00:54:09,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:54:13,941 WARN L854 $PredicateComparison]: unable to prove that (and (<= 0 (div (+ (* (- 1) |c_thread1Thread1of1ForFork0_~i~0#1|) 1) 4294967296)) (<= 1 |c_thread1Thread1of1ForFork0_~i~0#1|) (forall ((v_z_11 Int)) (or (< v_z_11 0) (< (mod |c_thread1Thread1of1ForFork0_~i~0#1| 4294967296) v_z_11) (let ((.cse0 (* 8589934593 v_z_11))) (< (+ (* 4294967296 (div (+ |c_thread2Thread1of1ForFork1_~i~1#1| 3) 4294967296)) .cse0) (+ |c_thread2Thread1of1ForFork1_~i~1#1| (* (div .cse0 4294967296) 4294967296) 4)))))) is different from false [2023-11-29 00:54:41,149 WARN L854 $PredicateComparison]: unable to prove that (and (<= 0 (div (+ (* (- 1) |c_thread1Thread1of1ForFork0_~i~0#1|) 3) 4294967296)) (forall ((v_z_11 Int)) (or (< v_z_11 0) (< (mod |c_thread1Thread1of1ForFork0_~i~0#1| 4294967296) v_z_11) (let ((.cse0 (* 8589934593 v_z_11))) (< (+ (* 4294967296 (div (+ |c_thread2Thread1of1ForFork1_~i~1#1| 3) 4294967296)) .cse0) (+ |c_thread2Thread1of1ForFork1_~i~1#1| (* (div .cse0 4294967296) 4294967296) 4))))) (<= 3 |c_thread1Thread1of1ForFork0_~i~0#1|)) is different from false [2023-11-29 00:54:45,201 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:54:49,219 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:54:54,134 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:54:56,353 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.22s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:55:00,362 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:55:04,425 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.06s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:55:08,449 WARN L854 $PredicateComparison]: unable to prove that (and (let ((.cse0 (* 3 c_~n~0))) (< (+ (* (div |c_thread2Thread1of1ForFork1_~i~1#1| 4294967296) 4294967296) .cse0) (+ (* (div .cse0 4294967296) 4294967296) |c_thread2Thread1of1ForFork1_~i~1#1| 1))) (<= 0 (div (+ (* (- 1) |c_thread1Thread1of1ForFork0_~i~0#1|) 2) 4294967296)) (forall ((v_z_11 Int)) (or (< v_z_11 0) (< (mod |c_thread1Thread1of1ForFork0_~i~0#1| 4294967296) v_z_11) (let ((.cse1 (* 8589934593 v_z_11))) (< (+ (* 4294967296 (div (+ |c_thread2Thread1of1ForFork1_~i~1#1| 3) 4294967296)) .cse1) (+ |c_thread2Thread1of1ForFork1_~i~1#1| (* (div .cse1 4294967296) 4294967296) 4))))) (<= 2 |c_thread1Thread1of1ForFork0_~i~0#1|)) is different from false [2023-11-29 00:55:12,456 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:55:16,478 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:55:20,498 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:55:24,512 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:55:28,752 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:55:32,759 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:55:36,767 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:55:40,845 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:55:44,853 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:55:48,975 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:56:14,073 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:56:18,086 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:56:22,094 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:56:26,108 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:56:34,555 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:57:11,397 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:57:16,146 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:57:17,271 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:57:40,198 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:57:45,151 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:57:49,167 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:57:53,179 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:57:57,214 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:58:01,376 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.16s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:58:05,384 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:58:09,405 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:58:13,425 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:58:17,439 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:58:22,120 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:58:26,137 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:58:30,151 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:58:34,758 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:58:40,062 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:58:42,850 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:58:45,860 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.77s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:58:49,960 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:58:50,232 INFO L124 PetriNetUnfolderBase]: 2108/4029 cut-off events. [2023-11-29 00:58:50,232 INFO L125 PetriNetUnfolderBase]: For 41986/41986 co-relation queries the response was YES. [2023-11-29 00:58:50,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27630 conditions, 4029 events. 2108/4029 cut-off events. For 41986/41986 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 27485 event pairs, 226 based on Foata normal form. 12/4041 useless extension candidates. Maximal degree in co-relation 27555. Up to 1421 conditions per place. [2023-11-29 00:58:50,267 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 408 selfloop transitions, 303 changer transitions 36/748 dead transitions. [2023-11-29 00:58:50,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 748 transitions, 11317 flow [2023-11-29 00:58:50,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-29 00:58:50,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-29 00:58:50,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 222 transitions. [2023-11-29 00:58:50,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3915343915343915 [2023-11-29 00:58:50,270 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 222 transitions. [2023-11-29 00:58:50,270 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 222 transitions. [2023-11-29 00:58:50,270 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:58:50,270 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 222 transitions. [2023-11-29 00:58:50,271 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 8.222222222222221) internal successors, (222), 27 states have internal predecessors, (222), 0 states have call successors, (0), 0 states 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 00:58:50,272 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 21.0) internal successors, (588), 28 states have internal predecessors, (588), 0 states have call successors, (0), 0 states 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 00:58:50,272 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 21.0) internal successors, (588), 28 states have internal predecessors, (588), 0 states have call successors, (0), 0 states 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 00:58:50,273 INFO L175 Difference]: Start difference. First operand has 167 places, 371 transitions, 5105 flow. Second operand 27 states and 222 transitions. [2023-11-29 00:58:50,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 748 transitions, 11317 flow [2023-11-29 00:58:50,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 748 transitions, 10921 flow, removed 198 selfloop flow, removed 2 redundant places. [2023-11-29 00:58:50,425 INFO L231 Difference]: Finished difference. Result has 206 places, 536 transitions, 8292 flow [2023-11-29 00:58:50,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=4885, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=8292, PETRI_PLACES=206, PETRI_TRANSITIONS=536} [2023-11-29 00:58:50,426 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 184 predicate places. [2023-11-29 00:58:50,426 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 536 transitions, 8292 flow [2023-11-29 00:58:50,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:58:50,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:58:50,426 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:58:50,433 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3119035f-5ca6-4d34-acbf-736492195747/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 00:58:50,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3119035f-5ca6-4d34-acbf-736492195747/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 00:58:50,627 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 00:58:50,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:58:50,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1745513824, now seen corresponding path program 10 times [2023-11-29 00:58:50,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:58:50,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084362782] [2023-11-29 00:58:50,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:58:50,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:58:50,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:58:50,893 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:58:50,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:58:50,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084362782] [2023-11-29 00:58:50,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084362782] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:58:50,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311349164] [2023-11-29 00:58:50,894 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 00:58:50,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:58:50,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3119035f-5ca6-4d34-acbf-736492195747/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:58:50,895 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3119035f-5ca6-4d34-acbf-736492195747/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:58:50,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3119035f-5ca6-4d34-acbf-736492195747/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 00:58:51,008 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 00:58:51,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:58:51,010 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 00:58:51,011 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:58:51,142 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:58:51,142 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:58:51,340 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:58:51,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311349164] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:58:51,340 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:58:51,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-11-29 00:58:51,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275788457] [2023-11-29 00:58:51,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:58:51,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 00:58:51,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:58:51,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 00:58:51,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2023-11-29 00:58:51,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 00:58:51,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 536 transitions, 8292 flow. Second operand has 20 states, 20 states have (on average 4.85) internal successors, (97), 20 states have internal predecessors, (97), 0 states have call successors, (0), 0 states 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 00:58:51,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:58:51,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 00:58:51,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:58:53,908 INFO L124 PetriNetUnfolderBase]: 2116/4006 cut-off events. [2023-11-29 00:58:53,908 INFO L125 PetriNetUnfolderBase]: For 62007/62007 co-relation queries the response was YES. [2023-11-29 00:58:53,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32021 conditions, 4006 events. 2116/4006 cut-off events. For 62007/62007 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 26621 event pairs, 571 based on Foata normal form. 10/4016 useless extension candidates. Maximal degree in co-relation 31930. Up to 1737 conditions per place. [2023-11-29 00:58:53,951 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 317 selfloop transitions, 340 changer transitions 3/661 dead transitions. [2023-11-29 00:58:53,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 661 transitions, 11461 flow [2023-11-29 00:58:53,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-29 00:58:53,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-29 00:58:53,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 214 transitions. [2023-11-29 00:58:53,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4076190476190476 [2023-11-29 00:58:53,954 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 214 transitions. [2023-11-29 00:58:53,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 214 transitions. [2023-11-29 00:58:53,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:58:53,954 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 214 transitions. [2023-11-29 00:58:53,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 8.56) internal successors, (214), 25 states have internal predecessors, (214), 0 states have call successors, (0), 0 states 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 00:58:53,956 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 21.0) internal successors, (546), 26 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:58:53,957 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 21.0) internal successors, (546), 26 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:58:53,957 INFO L175 Difference]: Start difference. First operand has 206 places, 536 transitions, 8292 flow. Second operand 25 states and 214 transitions. [2023-11-29 00:58:53,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 661 transitions, 11461 flow [2023-11-29 00:58:54,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 661 transitions, 11119 flow, removed 143 selfloop flow, removed 4 redundant places. [2023-11-29 00:58:54,246 INFO L231 Difference]: Finished difference. Result has 233 places, 562 transitions, 9297 flow [2023-11-29 00:58:54,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=7965, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=315, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=9297, PETRI_PLACES=233, PETRI_TRANSITIONS=562} [2023-11-29 00:58:54,247 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 211 predicate places. [2023-11-29 00:58:54,247 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 562 transitions, 9297 flow [2023-11-29 00:58:54,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.85) internal successors, (97), 20 states have internal predecessors, (97), 0 states have call successors, (0), 0 states 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 00:58:54,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:58:54,248 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:58:54,253 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3119035f-5ca6-4d34-acbf-736492195747/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 00:58:54,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3119035f-5ca6-4d34-acbf-736492195747/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:58:54,448 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 00:58:54,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:58:54,449 INFO L85 PathProgramCache]: Analyzing trace with hash -762918912, now seen corresponding path program 11 times [2023-11-29 00:58:54,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:58:54,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199084115] [2023-11-29 00:58:54,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:58:54,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:58:54,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:58:54,715 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:58:54,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:58:54,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199084115] [2023-11-29 00:58:54,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199084115] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:58:54,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570570631] [2023-11-29 00:58:54,716 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 00:58:54,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:58:54,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3119035f-5ca6-4d34-acbf-736492195747/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:58:54,717 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3119035f-5ca6-4d34-acbf-736492195747/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:58:54,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3119035f-5ca6-4d34-acbf-736492195747/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 00:58:54,882 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-29 00:58:54,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:58:54,884 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 00:58:54,885 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:58:54,986 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:58:54,986 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:59:13,746 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:59:13,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570570631] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:59:13,746 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:59:13,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2023-11-29 00:59:13,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146606325] [2023-11-29 00:59:13,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:59:13,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 00:59:13,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:59:13,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 00:59:13,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=269, Unknown=4, NotChecked=0, Total=342 [2023-11-29 00:59:13,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 00:59:13,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 562 transitions, 9297 flow. Second operand has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 19 states have internal predecessors, (91), 0 states have call successors, (0), 0 states 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 00:59:13,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:59:13,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 00:59:13,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:59:24,648 WARN L854 $PredicateComparison]: unable to prove that (and (forall ((v_z_17 Int)) (or (let ((.cse0 (* 8589934593 v_z_17))) (< (+ (* 4294967296 (div (+ |c_thread2Thread1of1ForFork1_~i~1#1| 3) 4294967296)) .cse0) (+ (* 4294967296 (div .cse0 4294967296)) |c_thread2Thread1of1ForFork1_~i~1#1| 4))) (< v_z_17 0) (< (mod |c_thread1Thread1of1ForFork0_~i~0#1| 4294967296) v_z_17))) (<= 0 (div (+ (* (- 1) |c_thread1Thread1of1ForFork0_~i~0#1|) 2) 4294967296)) (<= 0 (div |c_thread1Thread1of1ForFork0_~i~0#1| 4294967296)) (<= (+ (* (div |c_thread2Thread1of1ForFork1_~i~1#1| 4294967296) 4294967296) |c_thread1Thread1of1ForFork0_~i~0#1|) |c_thread2Thread1of1ForFork1_~i~1#1|) (<= 2 |c_thread1Thread1of1ForFork0_~i~0#1|)) is different from false [2023-11-29 00:59:29,146 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:59:33,375 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:59:37,387 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:59:39,515 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:59:51,313 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:59:55,359 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:59:58,637 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 01:00:00,313 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 01:00:04,319 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 01:00:08,326 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 01:00:12,857 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 01:00:17,416 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 01:00:21,428 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 01:00:25,830 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 01:00:30,461 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 01:00:34,510 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 01:00:37,448 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 01:00:39,563 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 01:00:44,130 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 01:00:48,168 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 01:00:52,384 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 01:00:56,402 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 01:01:00,413 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 01:01:04,521 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 01:01:08,654 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 01:01:12,685 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 01:01:16,690 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 01:01:20,697 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 01:01:24,984 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.29s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 01:01:29,086 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 01:01:33,105 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 01:01:37,378 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 01:01:41,390 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 01:01:46,420 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 01:01:50,561 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 01:02:39,388 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 01:02:41,156 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 01:02:46,954 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 01:02:48,501 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 01:02:52,508 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 01:02:56,517 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 01:03:35,354 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 01:03:38,366 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 01:03:42,379 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 01:03:46,394 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 01:03:50,437 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 01:03:54,552 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.11s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 01:03:58,561 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 01:04:02,570 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 01:04:06,581 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 01:04:33,038 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 01:04:37,059 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 01:04:42,022 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 01:04:46,032 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 01:04:50,084 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 01:04:54,148 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 01:04:58,184 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 01:05:02,224 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 01:05:06,263 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 01:05:10,276 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 01:05:14,306 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 01:05:17,816 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.51s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 01:05:21,847 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 01:05:25,875 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 01:05:29,899 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 01:05:34,675 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (* (div |c_thread2Thread1of1ForFork1_~i~1#1| 4294967296) 4294967296))) (and (let ((.cse1 (* 3 c_~n~0))) (< (+ .cse0 .cse1) (+ (* (div .cse1 4294967296) 4294967296) |c_thread2Thread1of1ForFork1_~i~1#1| 1))) (forall ((v_z_17 Int)) (or (let ((.cse2 (* 8589934593 v_z_17))) (< (+ (* 4294967296 (div (+ |c_thread2Thread1of1ForFork1_~i~1#1| 3) 4294967296)) .cse2) (+ (* 4294967296 (div .cse2 4294967296)) |c_thread2Thread1of1ForFork1_~i~1#1| 4))) (< v_z_17 0) (< (mod |c_thread1Thread1of1ForFork0_~i~0#1| 4294967296) v_z_17))) (<= 0 (div |c_thread1Thread1of1ForFork0_~i~0#1| 4294967296)) (<= (+ .cse0 |c_thread1Thread1of1ForFork0_~i~0#1|) |c_thread2Thread1of1ForFork1_~i~1#1|))) is different from false [2023-11-29 01:05:38,680 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 01:05:42,688 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 01:05:46,712 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 01:05:50,719 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 01:05:51,849 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 01:05:55,855 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1]