./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/fib_unsafe-5.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de5e778c-b265-40a6-8165-b1ef3da768a4/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de5e778c-b265-40a6-8165-b1ef3da768a4/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_de5e778c-b265-40a6-8165-b1ef3da768a4/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de5e778c-b265-40a6-8165-b1ef3da768a4/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/fib_unsafe-5.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de5e778c-b265-40a6-8165-b1ef3da768a4/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_de5e778c-b265-40a6-8165-b1ef3da768a4/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 e0f90189cbea201dcd094fc9e84327a00ade17017ada90c5df84c8712afaf176 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 01:01:42,188 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 01:01:42,259 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de5e778c-b265-40a6-8165-b1ef3da768a4/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 01:01:42,263 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 01:01:42,264 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 01:01:42,290 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 01:01:42,291 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 01:01:42,292 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 01:01:42,292 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 01:01:42,293 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 01:01:42,293 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 01:01:42,294 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 01:01:42,295 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 01:01:42,295 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 01:01:42,296 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 01:01:42,296 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 01:01:42,297 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 01:01:42,297 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 01:01:42,298 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 01:01:42,298 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 01:01:42,299 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 01:01:42,300 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 01:01:42,301 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 01:01:42,301 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 01:01:42,302 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 01:01:42,302 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 01:01:42,302 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 01:01:42,303 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 01:01:42,303 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 01:01:42,304 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 01:01:42,304 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 01:01:42,305 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 01:01:42,305 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 01:01:42,305 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 01:01:42,305 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 01:01:42,306 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 01:01:42,306 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 01:01:42,306 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 01:01:42,306 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 01:01:42,306 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 01:01:42,306 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 01:01:42,307 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 01:01:42,307 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_de5e778c-b265-40a6-8165-b1ef3da768a4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de5e778c-b265-40a6-8165-b1ef3da768a4/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e0f90189cbea201dcd094fc9e84327a00ade17017ada90c5df84c8712afaf176 [2023-11-29 01:01:42,539 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 01:01:42,561 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 01:01:42,564 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 01:01:42,565 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 01:01:42,566 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 01:01:42,567 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de5e778c-b265-40a6-8165-b1ef3da768a4/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/pthread/fib_unsafe-5.i [2023-11-29 01:01:45,393 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 01:01:45,627 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 01:01:45,628 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de5e778c-b265-40a6-8165-b1ef3da768a4/sv-benchmarks/c/pthread/fib_unsafe-5.i [2023-11-29 01:01:45,642 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de5e778c-b265-40a6-8165-b1ef3da768a4/bin/uautomizer-verify-BQ2R08f2Ya/data/785b70002/3bd1b243783c45e9af3f9ad811caf857/FLAG56a889feb [2023-11-29 01:01:45,654 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de5e778c-b265-40a6-8165-b1ef3da768a4/bin/uautomizer-verify-BQ2R08f2Ya/data/785b70002/3bd1b243783c45e9af3f9ad811caf857 [2023-11-29 01:01:45,657 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 01:01:45,658 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 01:01:45,659 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 01:01:45,659 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 01:01:45,664 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 01:01:45,665 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 01:01:45" (1/1) ... [2023-11-29 01:01:45,666 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33ca20b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:01:45, skipping insertion in model container [2023-11-29 01:01:45,666 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 01:01:45" (1/1) ... [2023-11-29 01:01:45,718 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 01:01:46,015 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_de5e778c-b265-40a6-8165-b1ef3da768a4/sv-benchmarks/c/pthread/fib_unsafe-5.i[30243,30256] [2023-11-29 01:01:46,038 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 01:01:46,048 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 01:01:46,080 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_de5e778c-b265-40a6-8165-b1ef3da768a4/sv-benchmarks/c/pthread/fib_unsafe-5.i[30243,30256] [2023-11-29 01:01:46,088 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 01:01:46,120 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 01:01:46,120 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 01:01:46,130 INFO L206 MainTranslator]: Completed translation [2023-11-29 01:01:46,130 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:01:46 WrapperNode [2023-11-29 01:01:46,131 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 01:01:46,132 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 01:01:46,132 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 01:01:46,132 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 01:01:46,142 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:01:46" (1/1) ... [2023-11-29 01:01:46,158 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:01:46" (1/1) ... [2023-11-29 01:01:46,185 INFO L138 Inliner]: procedures = 165, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 74 [2023-11-29 01:01:46,185 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 01:01:46,186 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 01:01:46,186 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 01:01:46,187 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 01:01:46,199 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:01:46" (1/1) ... [2023-11-29 01:01:46,200 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:01:46" (1/1) ... [2023-11-29 01:01:46,203 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:01:46" (1/1) ... [2023-11-29 01:01:46,220 INFO L175 MemorySlicer]: Split 4 memory accesses to 3 slices as follows [2, 1, 1]. 50 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2023-11-29 01:01:46,220 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:01:46" (1/1) ... [2023-11-29 01:01:46,220 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:01:46" (1/1) ... [2023-11-29 01:01:46,227 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:01:46" (1/1) ... [2023-11-29 01:01:46,231 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:01:46" (1/1) ... [2023-11-29 01:01:46,234 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:01:46" (1/1) ... [2023-11-29 01:01:46,235 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:01:46" (1/1) ... [2023-11-29 01:01:46,239 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 01:01:46,240 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 01:01:46,240 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 01:01:46,240 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 01:01:46,241 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:01:46" (1/1) ... [2023-11-29 01:01:46,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 01:01:46,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de5e778c-b265-40a6-8165-b1ef3da768a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:01:46,272 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de5e778c-b265-40a6-8165-b1ef3da768a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 01:01:46,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de5e778c-b265-40a6-8165-b1ef3da768a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 01:01:46,317 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-11-29 01:01:46,318 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-11-29 01:01:46,318 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-11-29 01:01:46,318 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-11-29 01:01:46,318 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 01:01:46,318 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 01:01:46,319 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 01:01:46,319 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-29 01:01:46,319 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 01:01:46,319 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 01:01:46,319 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 01:01:46,319 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 01:01:46,320 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 01:01:46,320 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 01:01:46,320 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-29 01:01:46,320 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 01:01:46,320 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 01:01:46,322 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 01:01:46,471 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 01:01:46,473 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 01:01:46,634 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 01:01:46,770 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 01:01:46,770 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-29 01:01:46,771 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 01:01:46 BoogieIcfgContainer [2023-11-29 01:01:46,771 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 01:01:46,773 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 01:01:46,773 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 01:01:46,776 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 01:01:46,776 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 01:01:45" (1/3) ... [2023-11-29 01:01:46,777 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a6acb37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 01:01:46, skipping insertion in model container [2023-11-29 01:01:46,777 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:01:46" (2/3) ... [2023-11-29 01:01:46,778 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a6acb37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 01:01:46, skipping insertion in model container [2023-11-29 01:01:46,778 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 01:01:46" (3/3) ... [2023-11-29 01:01:46,779 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_unsafe-5.i [2023-11-29 01:01:46,785 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-29 01:01:46,792 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 01:01:46,792 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 01:01:46,792 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 01:01:46,821 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-29 01:01:46,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 32 places, 29 transitions, 66 flow [2023-11-29 01:01:46,877 INFO L124 PetriNetUnfolderBase]: 4/27 cut-off events. [2023-11-29 01:01:46,877 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 01:01:46,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34 conditions, 27 events. 4/27 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 27 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 24. Up to 2 conditions per place. [2023-11-29 01:01:46,881 INFO L82 GeneralOperation]: Start removeDead. Operand has 32 places, 29 transitions, 66 flow [2023-11-29 01:01:46,884 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 27 transitions, 60 flow [2023-11-29 01:01:46,896 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 01:01:46,904 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;@a5f42f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 01:01:46,904 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-29 01:01:46,915 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 01:01:46,915 INFO L124 PetriNetUnfolderBase]: 4/25 cut-off events. [2023-11-29 01:01:46,915 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 01:01:46,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:01:46,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:01:46,917 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 01:01:46,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:01:46,923 INFO L85 PathProgramCache]: Analyzing trace with hash -369539475, now seen corresponding path program 1 times [2023-11-29 01:01:46,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:01:46,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664047129] [2023-11-29 01:01:46,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:01:46,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:01:47,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:01:47,224 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 01:01:47,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:01:47,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664047129] [2023-11-29 01:01:47,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664047129] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:01:47,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:01:47,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 01:01:47,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255167548] [2023-11-29 01:01:47,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:01:47,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:01:47,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:01:47,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:01:47,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:01:47,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 29 [2023-11-29 01:01:47,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 27 transitions, 60 flow. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:01:47,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:01:47,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 29 [2023-11-29 01:01:47,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:01:47,385 INFO L124 PetriNetUnfolderBase]: 115/223 cut-off events. [2023-11-29 01:01:47,385 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-29 01:01:47,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 412 conditions, 223 events. 115/223 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 689 event pairs, 20 based on Foata normal form. 9/209 useless extension candidates. Maximal degree in co-relation 398. Up to 118 conditions per place. [2023-11-29 01:01:47,391 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 20 selfloop transitions, 2 changer transitions 1/33 dead transitions. [2023-11-29 01:01:47,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 33 transitions, 118 flow [2023-11-29 01:01:47,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:01:47,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 01:01:47,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 61 transitions. [2023-11-29 01:01:47,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7011494252873564 [2023-11-29 01:01:47,404 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 61 transitions. [2023-11-29 01:01:47,404 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 61 transitions. [2023-11-29 01:01:47,405 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:01:47,407 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 61 transitions. [2023-11-29 01:01:47,409 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:01:47,412 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:01:47,413 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:01:47,414 INFO L175 Difference]: Start difference. First operand has 30 places, 27 transitions, 60 flow. Second operand 3 states and 61 transitions. [2023-11-29 01:01:47,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 33 transitions, 118 flow [2023-11-29 01:01:47,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 33 transitions, 116 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 01:01:47,420 INFO L231 Difference]: Finished difference. Result has 31 places, 26 transitions, 66 flow [2023-11-29 01:01:47,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=31, PETRI_TRANSITIONS=26} [2023-11-29 01:01:47,427 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 1 predicate places. [2023-11-29 01:01:47,427 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 26 transitions, 66 flow [2023-11-29 01:01:47,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:01:47,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:01:47,428 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:01:47,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 01:01:47,429 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 01:01:47,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:01:47,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1403763973, now seen corresponding path program 1 times [2023-11-29 01:01:47,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:01:47,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730997511] [2023-11-29 01:01:47,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:01:47,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:01:47,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:01:47,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:01:47,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:01:47,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730997511] [2023-11-29 01:01:47,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730997511] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:01:47,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197644589] [2023-11-29 01:01:47,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:01:47,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:01:47,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de5e778c-b265-40a6-8165-b1ef3da768a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:01:47,549 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de5e778c-b265-40a6-8165-b1ef3da768a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:01:47,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de5e778c-b265-40a6-8165-b1ef3da768a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 01:01:47,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:01:47,656 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 01:01:47,661 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:01:47,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:01:47,699 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:01:47,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:01:47,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197644589] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:01:47,720 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:01:47,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-29 01:01:47,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701070593] [2023-11-29 01:01:47,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:01:47,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 01:01:47,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:01:47,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 01:01:47,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-29 01:01:47,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 29 [2023-11-29 01:01:47,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 66 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:01:47,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:01:47,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 29 [2023-11-29 01:01:47,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:01:47,859 INFO L124 PetriNetUnfolderBase]: 151/277 cut-off events. [2023-11-29 01:01:47,860 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-29 01:01:47,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 584 conditions, 277 events. 151/277 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 802 event pairs, 20 based on Foata normal form. 0/254 useless extension candidates. Maximal degree in co-relation 569. Up to 91 conditions per place. [2023-11-29 01:01:47,865 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 38 selfloop transitions, 5 changer transitions 0/53 dead transitions. [2023-11-29 01:01:47,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 53 transitions, 212 flow [2023-11-29 01:01:47,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 01:01:47,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 01:01:47,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 118 transitions. [2023-11-29 01:01:47,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6781609195402298 [2023-11-29 01:01:47,868 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 118 transitions. [2023-11-29 01:01:47,869 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 118 transitions. [2023-11-29 01:01:47,869 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:01:47,869 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 118 transitions. [2023-11-29 01:01:47,871 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:01:47,872 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 29.0) internal successors, (203), 7 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:01:47,873 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 29.0) internal successors, (203), 7 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:01:47,873 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 66 flow. Second operand 6 states and 118 transitions. [2023-11-29 01:01:47,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 53 transitions, 212 flow [2023-11-29 01:01:47,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 53 transitions, 210 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 01:01:47,876 INFO L231 Difference]: Finished difference. Result has 37 places, 29 transitions, 100 flow [2023-11-29 01:01:47,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=100, PETRI_PLACES=37, PETRI_TRANSITIONS=29} [2023-11-29 01:01:47,878 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 7 predicate places. [2023-11-29 01:01:47,878 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 29 transitions, 100 flow [2023-11-29 01:01:47,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:01:47,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:01:47,879 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:01:47,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de5e778c-b265-40a6-8165-b1ef3da768a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 01:01:48,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de5e778c-b265-40a6-8165-b1ef3da768a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:01:48,085 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 01:01:48,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:01:48,085 INFO L85 PathProgramCache]: Analyzing trace with hash -30528403, now seen corresponding path program 2 times [2023-11-29 01:01:48,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:01:48,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352128750] [2023-11-29 01:01:48,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:01:48,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:01:48,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:01:48,239 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 01:01:48,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:01:48,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352128750] [2023-11-29 01:01:48,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352128750] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:01:48,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115222703] [2023-11-29 01:01:48,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:01:48,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:01:48,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de5e778c-b265-40a6-8165-b1ef3da768a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:01:48,245 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de5e778c-b265-40a6-8165-b1ef3da768a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:01:48,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de5e778c-b265-40a6-8165-b1ef3da768a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 01:01:48,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 01:01:48,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:01:48,362 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 01:01:48,364 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:01:48,387 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 01:01:48,387 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:01:48,458 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 01:01:48,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115222703] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:01:48,459 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:01:48,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-11-29 01:01:48,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054603863] [2023-11-29 01:01:48,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:01:48,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 01:01:48,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:01:48,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 01:01:48,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-29 01:01:48,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 29 [2023-11-29 01:01:48,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 29 transitions, 100 flow. Second operand has 13 states, 13 states have (on average 13.538461538461538) internal successors, (176), 13 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:01:48,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:01:48,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 29 [2023-11-29 01:01:48,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:01:48,683 INFO L124 PetriNetUnfolderBase]: 259/439 cut-off events. [2023-11-29 01:01:48,683 INFO L125 PetriNetUnfolderBase]: For 207/207 co-relation queries the response was YES. [2023-11-29 01:01:48,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1110 conditions, 439 events. 259/439 cut-off events. For 207/207 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1199 event pairs, 20 based on Foata normal form. 54/479 useless extension candidates. Maximal degree in co-relation 1091. Up to 109 conditions per place. [2023-11-29 01:01:48,690 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 74 selfloop transitions, 11 changer transitions 0/95 dead transitions. [2023-11-29 01:01:48,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 95 transitions, 426 flow [2023-11-29 01:01:48,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 01:01:48,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-29 01:01:48,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 235 transitions. [2023-11-29 01:01:48,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6752873563218391 [2023-11-29 01:01:48,694 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 235 transitions. [2023-11-29 01:01:48,694 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 235 transitions. [2023-11-29 01:01:48,695 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:01:48,695 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 235 transitions. [2023-11-29 01:01:48,697 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 19.583333333333332) internal successors, (235), 12 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:01:48,700 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 29.0) internal successors, (377), 13 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:01:48,700 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 29.0) internal successors, (377), 13 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:01:48,700 INFO L175 Difference]: Start difference. First operand has 37 places, 29 transitions, 100 flow. Second operand 12 states and 235 transitions. [2023-11-29 01:01:48,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 95 transitions, 426 flow [2023-11-29 01:01:48,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 95 transitions, 412 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-29 01:01:48,707 INFO L231 Difference]: Finished difference. Result has 53 places, 35 transitions, 170 flow [2023-11-29 01:01:48,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=170, PETRI_PLACES=53, PETRI_TRANSITIONS=35} [2023-11-29 01:01:48,708 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 23 predicate places. [2023-11-29 01:01:48,709 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 35 transitions, 170 flow [2023-11-29 01:01:48,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 13.538461538461538) internal successors, (176), 13 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:01:48,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:01:48,709 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:01:48,715 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de5e778c-b265-40a6-8165-b1ef3da768a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 01:01:48,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de5e778c-b265-40a6-8165-b1ef3da768a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:01:48,910 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 01:01:48,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:01:48,911 INFO L85 PathProgramCache]: Analyzing trace with hash -246684307, now seen corresponding path program 3 times [2023-11-29 01:01:48,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:01:48,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840239981] [2023-11-29 01:01:48,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:01:48,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:01:48,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:01:49,153 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:01:49,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:01:49,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840239981] [2023-11-29 01:01:49,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840239981] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:01:49,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295455628] [2023-11-29 01:01:49,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 01:01:49,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:01:49,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de5e778c-b265-40a6-8165-b1ef3da768a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:01:49,156 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de5e778c-b265-40a6-8165-b1ef3da768a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:01:49,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de5e778c-b265-40a6-8165-b1ef3da768a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 01:01:49,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-29 01:01:49,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:01:49,272 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 01:01:49,273 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:01:49,317 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:01:49,318 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:01:49,453 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:01:49,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295455628] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:01:49,454 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:01:49,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 15 [2023-11-29 01:01:49,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484154249] [2023-11-29 01:01:49,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:01:49,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 01:01:49,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:01:49,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 01:01:49,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2023-11-29 01:01:49,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 29 [2023-11-29 01:01:49,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 35 transitions, 170 flow. Second operand has 15 states, 15 states have (on average 13.533333333333333) internal successors, (203), 15 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:01:49,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:01:49,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 29 [2023-11-29 01:01:49,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:01:49,709 INFO L124 PetriNetUnfolderBase]: 295/493 cut-off events. [2023-11-29 01:01:49,710 INFO L125 PetriNetUnfolderBase]: For 963/963 co-relation queries the response was YES. [2023-11-29 01:01:49,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1432 conditions, 493 events. 295/493 cut-off events. For 963/963 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1335 event pairs, 20 based on Foata normal form. 18/497 useless extension candidates. Maximal degree in co-relation 1406. Up to 100 conditions per place. [2023-11-29 01:01:49,717 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 86 selfloop transitions, 13 changer transitions 0/109 dead transitions. [2023-11-29 01:01:49,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 109 transitions, 528 flow [2023-11-29 01:01:49,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 01:01:49,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-29 01:01:49,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 269 transitions. [2023-11-29 01:01:49,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6625615763546798 [2023-11-29 01:01:49,721 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 269 transitions. [2023-11-29 01:01:49,721 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 269 transitions. [2023-11-29 01:01:49,721 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:01:49,721 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 269 transitions. [2023-11-29 01:01:49,723 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 19.214285714285715) internal successors, (269), 14 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:01:49,726 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 29.0) internal successors, (435), 15 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:01:49,727 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 29.0) internal successors, (435), 15 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:01:49,727 INFO L175 Difference]: Start difference. First operand has 53 places, 35 transitions, 170 flow. Second operand 14 states and 269 transitions. [2023-11-29 01:01:49,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 109 transitions, 528 flow [2023-11-29 01:01:49,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 109 transitions, 476 flow, removed 21 selfloop flow, removed 5 redundant places. [2023-11-29 01:01:49,736 INFO L231 Difference]: Finished difference. Result has 63 places, 37 transitions, 170 flow [2023-11-29 01:01:49,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=170, PETRI_PLACES=63, PETRI_TRANSITIONS=37} [2023-11-29 01:01:49,738 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 33 predicate places. [2023-11-29 01:01:49,738 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 37 transitions, 170 flow [2023-11-29 01:01:49,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 13.533333333333333) internal successors, (203), 15 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:01:49,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:01:49,739 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:01:49,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de5e778c-b265-40a6-8165-b1ef3da768a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-29 01:01:49,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de5e778c-b265-40a6-8165-b1ef3da768a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:01:49,945 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 01:01:49,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:01:49,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1653671827, now seen corresponding path program 4 times [2023-11-29 01:01:49,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:01:49,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925327971] [2023-11-29 01:01:49,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:01:49,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:01:50,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:01:51,018 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:01:51,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:01:51,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925327971] [2023-11-29 01:01:51,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925327971] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:01:51,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238489465] [2023-11-29 01:01:51,019 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 01:01:51,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:01:51,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de5e778c-b265-40a6-8165-b1ef3da768a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:01:51,020 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de5e778c-b265-40a6-8165-b1ef3da768a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:01:51,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de5e778c-b265-40a6-8165-b1ef3da768a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 01:01:51,114 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 01:01:51,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:01:51,117 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 44 conjunts are in the unsatisfiable core [2023-11-29 01:01:51,120 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:01:51,940 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 55 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:01:51,940 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:01:52,918 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:01:52,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238489465] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:01:52,918 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:01:52,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 53 [2023-11-29 01:01:52,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010857384] [2023-11-29 01:01:52,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:01:52,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-11-29 01:01:52,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:01:52,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-11-29 01:01:52,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=2455, Unknown=0, NotChecked=0, Total=2862 [2023-11-29 01:01:53,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2023-11-29 01:01:53,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 37 transitions, 170 flow. Second operand has 54 states, 54 states have (on average 7.314814814814815) internal successors, (395), 54 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:01:53,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:01:53,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2023-11-29 01:01:53,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:02:05,770 INFO L124 PetriNetUnfolderBase]: 11281/18699 cut-off events. [2023-11-29 01:02:05,770 INFO L125 PetriNetUnfolderBase]: For 34421/34421 co-relation queries the response was YES. [2023-11-29 01:02:05,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48985 conditions, 18699 events. 11281/18699 cut-off events. For 34421/34421 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 119199 event pairs, 104 based on Foata normal form. 276/18971 useless extension candidates. Maximal degree in co-relation 48955. Up to 2388 conditions per place. [2023-11-29 01:02:05,908 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 493 selfloop transitions, 445 changer transitions 383/1325 dead transitions. [2023-11-29 01:02:05,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 1325 transitions, 7827 flow [2023-11-29 01:02:05,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2023-11-29 01:02:05,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2023-11-29 01:02:05,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 1798 transitions. [2023-11-29 01:02:05,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49206349206349204 [2023-11-29 01:02:05,918 INFO L72 ComplementDD]: Start complementDD. Operand 126 states and 1798 transitions. [2023-11-29 01:02:05,918 INFO L73 IsDeterministic]: Start isDeterministic. Operand 126 states and 1798 transitions. [2023-11-29 01:02:05,921 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:02:05,921 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 126 states and 1798 transitions. [2023-11-29 01:02:05,928 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 127 states, 126 states have (on average 14.26984126984127) internal successors, (1798), 126 states have internal predecessors, (1798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:02:05,940 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 127 states, 127 states have (on average 29.0) internal successors, (3683), 127 states have internal predecessors, (3683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:02:05,942 INFO L81 ComplementDD]: Finished complementDD. Result has 127 states, 127 states have (on average 29.0) internal successors, (3683), 127 states have internal predecessors, (3683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:02:05,942 INFO L175 Difference]: Start difference. First operand has 63 places, 37 transitions, 170 flow. Second operand 126 states and 1798 transitions. [2023-11-29 01:02:05,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 1325 transitions, 7827 flow [2023-11-29 01:02:06,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 1325 transitions, 6845 flow, removed 210 selfloop flow, removed 11 redundant places. [2023-11-29 01:02:06,051 INFO L231 Difference]: Finished difference. Result has 239 places, 527 transitions, 3170 flow [2023-11-29 01:02:06,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=126, PETRI_FLOW=3170, PETRI_PLACES=239, PETRI_TRANSITIONS=527} [2023-11-29 01:02:06,052 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 209 predicate places. [2023-11-29 01:02:06,053 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 527 transitions, 3170 flow [2023-11-29 01:02:06,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 7.314814814814815) internal successors, (395), 54 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:02:06,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:02:06,053 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:02:06,059 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de5e778c-b265-40a6-8165-b1ef3da768a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 01:02:06,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de5e778c-b265-40a6-8165-b1ef3da768a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:02:06,259 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 01:02:06,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:02:06,260 INFO L85 PathProgramCache]: Analyzing trace with hash -558415907, now seen corresponding path program 1 times [2023-11-29 01:02:06,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:02:06,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731829063] [2023-11-29 01:02:06,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:02:06,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:02:06,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:02:07,174 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:02:07,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:02:07,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731829063] [2023-11-29 01:02:07,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731829063] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:02:07,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203582253] [2023-11-29 01:02:07,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:02:07,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:02:07,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de5e778c-b265-40a6-8165-b1ef3da768a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:02:07,176 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de5e778c-b265-40a6-8165-b1ef3da768a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:02:07,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de5e778c-b265-40a6-8165-b1ef3da768a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 01:02:07,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:02:07,269 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-29 01:02:07,272 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:02:08,067 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 55 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:02:08,068 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:02:09,144 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:02:09,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203582253] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:02:09,144 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:02:09,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 60 [2023-11-29 01:02:09,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228921365] [2023-11-29 01:02:09,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:02:09,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2023-11-29 01:02:09,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:02:09,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2023-11-29 01:02:09,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=443, Invalid=3217, Unknown=0, NotChecked=0, Total=3660 [2023-11-29 01:02:09,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2023-11-29 01:02:09,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 527 transitions, 3170 flow. Second operand has 61 states, 61 states have (on average 7.360655737704918) internal successors, (449), 61 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:02:09,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:02:09,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2023-11-29 01:02:09,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:03:37,444 INFO L124 PetriNetUnfolderBase]: 122167/206803 cut-off events. [2023-11-29 01:03:37,444 INFO L125 PetriNetUnfolderBase]: For 9115957/9115957 co-relation queries the response was YES. [2023-11-29 01:03:39,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1068364 conditions, 206803 events. 122167/206803 cut-off events. For 9115957/9115957 co-relation queries the response was YES. Maximal size of possible extension queue 3702. Compared 1945886 event pairs, 7276 based on Foata normal form. 4959/211758 useless extension candidates. Maximal degree in co-relation 1068270. Up to 23190 conditions per place. [2023-11-29 01:03:40,260 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 1556 selfloop transitions, 4748 changer transitions 2973/9281 dead transitions. [2023-11-29 01:03:40,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 536 places, 9281 transitions, 77389 flow [2023-11-29 01:03:40,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 354 states. [2023-11-29 01:03:40,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 354 states. [2023-11-29 01:03:40,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 5013 transitions. [2023-11-29 01:03:40,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48831092928112213 [2023-11-29 01:03:40,278 INFO L72 ComplementDD]: Start complementDD. Operand 354 states and 5013 transitions. [2023-11-29 01:03:40,278 INFO L73 IsDeterministic]: Start isDeterministic. Operand 354 states and 5013 transitions. [2023-11-29 01:03:40,283 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:03:40,283 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 354 states and 5013 transitions. [2023-11-29 01:03:40,298 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 355 states, 354 states have (on average 14.161016949152541) internal successors, (5013), 354 states have internal predecessors, (5013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:03:40,316 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 355 states, 355 states have (on average 29.0) internal successors, (10295), 355 states have internal predecessors, (10295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:03:40,320 INFO L81 ComplementDD]: Finished complementDD. Result has 355 states, 355 states have (on average 29.0) internal successors, (10295), 355 states have internal predecessors, (10295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:03:40,321 INFO L175 Difference]: Start difference. First operand has 239 places, 527 transitions, 3170 flow. Second operand 354 states and 5013 transitions. [2023-11-29 01:03:40,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 536 places, 9281 transitions, 77389 flow [2023-11-29 01:13:41,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 476 places, 9281 transitions, 62753 flow, removed 7295 selfloop flow, removed 60 redundant places. [2023-11-29 01:13:41,706 INFO L231 Difference]: Finished difference. Result has 706 places, 5211 transitions, 42085 flow [2023-11-29 01:13:41,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=2976, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=485, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=354, PETRI_FLOW=42085, PETRI_PLACES=706, PETRI_TRANSITIONS=5211} [2023-11-29 01:13:41,708 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 676 predicate places. [2023-11-29 01:13:41,708 INFO L495 AbstractCegarLoop]: Abstraction has has 706 places, 5211 transitions, 42085 flow [2023-11-29 01:13:41,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 7.360655737704918) internal successors, (449), 61 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:13:41,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:13:41,709 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:13:41,714 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de5e778c-b265-40a6-8165-b1ef3da768a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 01:13:41,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de5e778c-b265-40a6-8165-b1ef3da768a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:13:41,910 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 01:13:41,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:13:41,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1725019212, now seen corresponding path program 1 times [2023-11-29 01:13:41,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:13:41,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346785883] [2023-11-29 01:13:41,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:13:41,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:13:41,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:13:42,641 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:13:42,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:13:42,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346785883] [2023-11-29 01:13:42,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346785883] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:13:42,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480201692] [2023-11-29 01:13:42,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:13:42,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:13:42,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de5e778c-b265-40a6-8165-b1ef3da768a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:13:42,643 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de5e778c-b265-40a6-8165-b1ef3da768a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:13:42,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de5e778c-b265-40a6-8165-b1ef3da768a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 01:13:42,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:13:42,740 INFO L262 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-29 01:13:42,743 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:13:43,410 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 55 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:13:43,410 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:13:44,291 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:13:44,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480201692] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:13:44,291 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:13:44,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 59 [2023-11-29 01:13:44,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656569529] [2023-11-29 01:13:44,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:13:44,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2023-11-29 01:13:44,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:13:44,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2023-11-29 01:13:44,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=3103, Unknown=0, NotChecked=0, Total=3540 [2023-11-29 01:13:44,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2023-11-29 01:13:44,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 706 places, 5211 transitions, 42085 flow. Second operand has 60 states, 60 states have (on average 7.383333333333334) internal successors, (443), 60 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:13:44,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:13:44,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2023-11-29 01:13:44,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand