./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5e54725-9257-44fd-9e16-f08f239a5278/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5e54725-9257-44fd-9e16-f08f239a5278/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5e54725-9257-44fd-9e16-f08f239a5278/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5e54725-9257-44fd-9e16-f08f239a5278/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5e54725-9257-44fd-9e16-f08f239a5278/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5e54725-9257-44fd-9e16-f08f239a5278/bin/uautomizer-verify-VRDe98Ueme --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 67ced8cbf918778cce3ae5cae291c50696df3950945fdf68713903c29ac269e1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:43:43,088 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:43:43,210 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5e54725-9257-44fd-9e16-f08f239a5278/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 11:43:43,223 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:43:43,224 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:43:43,279 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:43:43,280 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:43:43,283 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:43:43,284 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:43:43,285 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:43:43,286 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:43:43,288 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:43:43,289 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:43:43,290 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:43:43,292 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:43:43,292 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:43:43,293 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 11:43:43,294 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:43:43,294 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:43:43,295 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:43:43,295 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:43:43,296 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 11:43:43,296 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:43:43,297 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 11:43:43,297 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:43:43,298 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 11:43:43,298 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:43:43,299 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:43:43,299 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:43:43,300 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:43:43,300 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:43:43,301 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:43:43,301 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:43:43,309 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:43:43,310 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 11:43:43,310 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:43:43,311 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:43:43,311 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:43:43,312 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:43:43,312 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 11:43:43,313 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:43:43,313 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:43:43,314 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_c5e54725-9257-44fd-9e16-f08f239a5278/bin/uautomizer-verify-VRDe98Ueme/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5e54725-9257-44fd-9e16-f08f239a5278/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 67ced8cbf918778cce3ae5cae291c50696df3950945fdf68713903c29ac269e1 [2023-11-26 11:43:43,655 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:43:43,687 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:43:43,690 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:43:43,691 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:43:43,691 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:43:43,693 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5e54725-9257-44fd-9e16-f08f239a5278/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c [2023-11-26 11:43:46,799 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:43:47,044 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:43:47,044 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5e54725-9257-44fd-9e16-f08f239a5278/sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c [2023-11-26 11:43:47,053 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5e54725-9257-44fd-9e16-f08f239a5278/bin/uautomizer-verify-VRDe98Ueme/data/b2cd081ec/1fb444cb3a804277ae4f81da20ecbf77/FLAG0afbb3301 [2023-11-26 11:43:47,068 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5e54725-9257-44fd-9e16-f08f239a5278/bin/uautomizer-verify-VRDe98Ueme/data/b2cd081ec/1fb444cb3a804277ae4f81da20ecbf77 [2023-11-26 11:43:47,070 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:43:47,072 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:43:47,073 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:43:47,073 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:43:47,079 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:43:47,080 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:43:47" (1/1) ... [2023-11-26 11:43:47,081 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50005fa7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:43:47, skipping insertion in model container [2023-11-26 11:43:47,081 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:43:47" (1/1) ... [2023-11-26 11:43:47,109 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:43:47,299 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_c5e54725-9257-44fd-9e16-f08f239a5278/sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c[3071,3084] [2023-11-26 11:43:47,310 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:43:47,322 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:43:47,354 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_c5e54725-9257-44fd-9e16-f08f239a5278/sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c[3071,3084] [2023-11-26 11:43:47,362 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:43:47,375 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:43:47,380 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:43:47,389 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:43:47,389 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:43:47 WrapperNode [2023-11-26 11:43:47,390 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:43:47,392 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:43:47,392 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:43:47,393 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:43:47,401 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:43:47" (1/1) ... [2023-11-26 11:43:47,429 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:43:47" (1/1) ... [2023-11-26 11:43:47,472 INFO L138 Inliner]: procedures = 26, calls = 63, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 141 [2023-11-26 11:43:47,472 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:43:47,473 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:43:47,473 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:43:47,474 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:43:47,486 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:43:47" (1/1) ... [2023-11-26 11:43:47,487 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:43:47" (1/1) ... [2023-11-26 11:43:47,501 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:43:47" (1/1) ... [2023-11-26 11:43:47,534 INFO L175 MemorySlicer]: Split 20 memory accesses to 6 slices as follows [2, 2, 10, 2, 2, 2]. 50 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0]. The 6 writes are split as follows [0, 1, 2, 1, 1, 1]. [2023-11-26 11:43:47,534 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:43:47" (1/1) ... [2023-11-26 11:43:47,534 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:43:47" (1/1) ... [2023-11-26 11:43:47,544 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:43:47" (1/1) ... [2023-11-26 11:43:47,548 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:43:47" (1/1) ... [2023-11-26 11:43:47,550 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:43:47" (1/1) ... [2023-11-26 11:43:47,553 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:43:47" (1/1) ... [2023-11-26 11:43:47,557 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:43:47,558 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:43:47,558 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:43:47,558 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:43:47,594 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:43:47" (1/1) ... [2023-11-26 11:43:47,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:43:47,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5e54725-9257-44fd-9e16-f08f239a5278/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:43:47,642 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5e54725-9257-44fd-9e16-f08f239a5278/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:43:47,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5e54725-9257-44fd-9e16-f08f239a5278/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:43:47,686 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:43:47,686 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 11:43:47,687 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 11:43:47,687 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 11:43:47,687 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 11:43:47,687 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-26 11:43:47,688 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-26 11:43:47,688 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2023-11-26 11:43:47,688 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 11:43:47,688 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 11:43:47,688 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-26 11:43:47,689 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-26 11:43:47,689 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-26 11:43:47,689 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2023-11-26 11:43:47,689 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-26 11:43:47,689 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-26 11:43:47,690 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-26 11:43:47,690 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-26 11:43:47,690 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-26 11:43:47,690 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-26 11:43:47,690 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-11-26 11:43:47,691 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-11-26 11:43:47,691 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:43:47,691 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 11:43:47,691 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 11:43:47,691 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-26 11:43:47,691 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-26 11:43:47,692 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-11-26 11:43:47,692 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-26 11:43:47,692 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-26 11:43:47,692 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-26 11:43:47,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:43:47,692 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:43:47,693 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 11:43:47,694 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-26 11:43:47,839 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:43:47,842 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:43:48,213 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:43:48,525 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:43:48,526 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-26 11:43:48,526 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:43:48 BoogieIcfgContainer [2023-11-26 11:43:48,527 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:43:48,530 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:43:48,530 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:43:48,533 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:43:48,534 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:43:47" (1/3) ... [2023-11-26 11:43:48,535 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3371ca3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:43:48, skipping insertion in model container [2023-11-26 11:43:48,535 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:43:47" (2/3) ... [2023-11-26 11:43:48,535 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3371ca3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:43:48, skipping insertion in model container [2023-11-26 11:43:48,536 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:43:48" (3/3) ... [2023-11-26 11:43:48,537 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-min-max-dec.wvr.c [2023-11-26 11:43:48,547 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-26 11:43:48,557 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:43:48,558 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 11:43:48,558 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-26 11:43:48,623 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-26 11:43:48,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 58 places, 49 transitions, 126 flow [2023-11-26 11:43:48,737 INFO L124 PetriNetUnfolderBase]: 4/45 cut-off events. [2023-11-26 11:43:48,737 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-26 11:43:48,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 45 events. 4/45 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 84 event pairs, 0 based on Foata normal form. 0/40 useless extension candidates. Maximal degree in co-relation 37. Up to 2 conditions per place. [2023-11-26 11:43:48,745 INFO L82 GeneralOperation]: Start removeDead. Operand has 58 places, 49 transitions, 126 flow [2023-11-26 11:43:48,771 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 53 places, 44 transitions, 112 flow [2023-11-26 11:43:48,790 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:43:48,804 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;@4fcfe881, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:43:48,804 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-26 11:43:48,845 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-26 11:43:48,846 INFO L124 PetriNetUnfolderBase]: 4/43 cut-off events. [2023-11-26 11:43:48,846 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-26 11:43:48,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:43:48,847 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:43:48,848 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-26 11:43:48,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:43:48,857 INFO L85 PathProgramCache]: Analyzing trace with hash -2110549717, now seen corresponding path program 1 times [2023-11-26 11:43:48,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:43:48,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165485302] [2023-11-26 11:43:48,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:43:48,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:43:49,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:43:49,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:43:49,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:43:49,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165485302] [2023-11-26 11:43:49,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165485302] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:43:49,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:43:49,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:43:49,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748383159] [2023-11-26 11:43:49,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:43:49,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:43:49,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:43:49,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:43:49,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:43:49,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2023-11-26 11:43:49,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 44 transitions, 112 flow. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:43:49,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:43:49,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2023-11-26 11:43:49,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:43:50,514 INFO L124 PetriNetUnfolderBase]: 3542/5179 cut-off events. [2023-11-26 11:43:50,515 INFO L125 PetriNetUnfolderBase]: For 299/299 co-relation queries the response was YES. [2023-11-26 11:43:50,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10271 conditions, 5179 events. 3542/5179 cut-off events. For 299/299 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 30730 event pairs, 1676 based on Foata normal form. 174/5137 useless extension candidates. Maximal degree in co-relation 9131. Up to 3161 conditions per place. [2023-11-26 11:43:50,582 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 47 selfloop transitions, 3 changer transitions 0/62 dead transitions. [2023-11-26 11:43:50,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 62 transitions, 257 flow [2023-11-26 11:43:50,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:43:50,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:43:50,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 115 transitions. [2023-11-26 11:43:50,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5867346938775511 [2023-11-26 11:43:50,597 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 115 transitions. [2023-11-26 11:43:50,598 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 115 transitions. [2023-11-26 11:43:50,600 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:43:50,603 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 115 transitions. [2023-11-26 11:43:50,608 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:43:50,613 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:43:50,613 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:43:50,615 INFO L175 Difference]: Start difference. First operand has 53 places, 44 transitions, 112 flow. Second operand 4 states and 115 transitions. [2023-11-26 11:43:50,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 62 transitions, 257 flow [2023-11-26 11:43:50,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 62 transitions, 235 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-11-26 11:43:50,640 INFO L231 Difference]: Finished difference. Result has 49 places, 45 transitions, 110 flow [2023-11-26 11:43:50,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=110, PETRI_PLACES=49, PETRI_TRANSITIONS=45} [2023-11-26 11:43:50,647 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, -4 predicate places. [2023-11-26 11:43:50,647 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 45 transitions, 110 flow [2023-11-26 11:43:50,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:43:50,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:43:50,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:43:50,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 11:43:50,649 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-26 11:43:50,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:43:50,650 INFO L85 PathProgramCache]: Analyzing trace with hash -2060181120, now seen corresponding path program 1 times [2023-11-26 11:43:50,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:43:50,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38979770] [2023-11-26 11:43:50,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:43:50,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:43:50,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:43:50,958 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:43:50,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:43:50,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38979770] [2023-11-26 11:43:50,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38979770] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:43:50,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:43:50,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:43:50,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698559271] [2023-11-26 11:43:50,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:43:50,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:43:50,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:43:50,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:43:50,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:43:50,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 49 [2023-11-26 11:43:50,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 45 transitions, 110 flow. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:43:50,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:43:50,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 49 [2023-11-26 11:43:50,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:43:51,977 INFO L124 PetriNetUnfolderBase]: 4551/6666 cut-off events. [2023-11-26 11:43:51,977 INFO L125 PetriNetUnfolderBase]: For 1168/1168 co-relation queries the response was YES. [2023-11-26 11:43:51,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14137 conditions, 6666 events. 4551/6666 cut-off events. For 1168/1168 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 39227 event pairs, 2562 based on Foata normal form. 192/6676 useless extension candidates. Maximal degree in co-relation 2151. Up to 4460 conditions per place. [2023-11-26 11:43:52,045 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 50 selfloop transitions, 3 changer transitions 0/64 dead transitions. [2023-11-26 11:43:52,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 64 transitions, 267 flow [2023-11-26 11:43:52,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:43:52,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:43:52,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 112 transitions. [2023-11-26 11:43:52,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2023-11-26 11:43:52,057 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 112 transitions. [2023-11-26 11:43:52,057 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 112 transitions. [2023-11-26 11:43:52,060 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:43:52,060 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 112 transitions. [2023-11-26 11:43:52,061 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:43:52,063 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:43:52,063 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:43:52,064 INFO L175 Difference]: Start difference. First operand has 49 places, 45 transitions, 110 flow. Second operand 4 states and 112 transitions. [2023-11-26 11:43:52,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 64 transitions, 267 flow [2023-11-26 11:43:52,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 64 transitions, 261 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 11:43:52,075 INFO L231 Difference]: Finished difference. Result has 51 places, 46 transitions, 120 flow [2023-11-26 11:43:52,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=120, PETRI_PLACES=51, PETRI_TRANSITIONS=46} [2023-11-26 11:43:52,077 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, -2 predicate places. [2023-11-26 11:43:52,077 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 46 transitions, 120 flow [2023-11-26 11:43:52,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:43:52,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:43:52,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:43:52,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 11:43:52,079 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-26 11:43:52,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:43:52,081 INFO L85 PathProgramCache]: Analyzing trace with hash 649085594, now seen corresponding path program 1 times [2023-11-26 11:43:52,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:43:52,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950403347] [2023-11-26 11:43:52,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:43:52,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:43:52,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:43:52,286 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:43:52,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:43:52,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950403347] [2023-11-26 11:43:52,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950403347] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:43:52,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:43:52,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:43:52,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342893650] [2023-11-26 11:43:52,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:43:52,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:43:52,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:43:52,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:43:52,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:43:52,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 49 [2023-11-26 11:43:52,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 46 transitions, 120 flow. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:43:52,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:43:52,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 49 [2023-11-26 11:43:52,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:43:53,305 INFO L124 PetriNetUnfolderBase]: 5176/7548 cut-off events. [2023-11-26 11:43:53,305 INFO L125 PetriNetUnfolderBase]: For 1544/1809 co-relation queries the response was YES. [2023-11-26 11:43:53,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17048 conditions, 7548 events. 5176/7548 cut-off events. For 1544/1809 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 44641 event pairs, 3063 based on Foata normal form. 517/7937 useless extension candidates. Maximal degree in co-relation 4322. Up to 5016 conditions per place. [2023-11-26 11:43:53,388 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 52 selfloop transitions, 3 changer transitions 0/66 dead transitions. [2023-11-26 11:43:53,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 66 transitions, 288 flow [2023-11-26 11:43:53,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:43:53,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:43:53,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 112 transitions. [2023-11-26 11:43:53,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2023-11-26 11:43:53,393 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 112 transitions. [2023-11-26 11:43:53,393 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 112 transitions. [2023-11-26 11:43:53,394 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:43:53,394 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 112 transitions. [2023-11-26 11:43:53,396 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:43:53,399 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:43:53,400 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:43:53,400 INFO L175 Difference]: Start difference. First operand has 51 places, 46 transitions, 120 flow. Second operand 4 states and 112 transitions. [2023-11-26 11:43:53,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 66 transitions, 288 flow [2023-11-26 11:43:53,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 66 transitions, 283 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 11:43:53,406 INFO L231 Difference]: Finished difference. Result has 53 places, 47 transitions, 130 flow [2023-11-26 11:43:53,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=130, PETRI_PLACES=53, PETRI_TRANSITIONS=47} [2023-11-26 11:43:53,410 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 0 predicate places. [2023-11-26 11:43:53,410 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 47 transitions, 130 flow [2023-11-26 11:43:53,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:43:53,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:43:53,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:43:53,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 11:43:53,412 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-26 11:43:53,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:43:53,413 INFO L85 PathProgramCache]: Analyzing trace with hash 625032986, now seen corresponding path program 1 times [2023-11-26 11:43:53,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:43:53,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58020191] [2023-11-26 11:43:53,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:43:53,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:43:53,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:43:53,621 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 11:43:53,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:43:53,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58020191] [2023-11-26 11:43:53,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58020191] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:43:53,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:43:53,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:43:53,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610030804] [2023-11-26 11:43:53,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:43:53,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:43:53,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:43:53,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:43:53,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:43:53,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2023-11-26 11:43:53,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 47 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:43:53,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:43:53,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2023-11-26 11:43:53,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:43:54,492 INFO L124 PetriNetUnfolderBase]: 4444/6470 cut-off events. [2023-11-26 11:43:54,492 INFO L125 PetriNetUnfolderBase]: For 1676/2144 co-relation queries the response was YES. [2023-11-26 11:43:54,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15415 conditions, 6470 events. 4444/6470 cut-off events. For 1676/2144 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 37907 event pairs, 3717 based on Foata normal form. 468/6823 useless extension candidates. Maximal degree in co-relation 4297. Up to 6001 conditions per place. [2023-11-26 11:43:54,536 INFO L140 encePairwiseOnDemand]: 46/49 looper letters, 34 selfloop transitions, 2 changer transitions 0/48 dead transitions. [2023-11-26 11:43:54,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 48 transitions, 204 flow [2023-11-26 11:43:54,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:43:54,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:43:54,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 82 transitions. [2023-11-26 11:43:54,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5578231292517006 [2023-11-26 11:43:54,538 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 82 transitions. [2023-11-26 11:43:54,539 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 82 transitions. [2023-11-26 11:43:54,539 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:43:54,539 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 82 transitions. [2023-11-26 11:43:54,540 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:43:54,540 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:43:54,541 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:43:54,541 INFO L175 Difference]: Start difference. First operand has 53 places, 47 transitions, 130 flow. Second operand 3 states and 82 transitions. [2023-11-26 11:43:54,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 48 transitions, 204 flow [2023-11-26 11:43:54,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 48 transitions, 200 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 11:43:54,546 INFO L231 Difference]: Finished difference. Result has 54 places, 48 transitions, 138 flow [2023-11-26 11:43:54,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=54, PETRI_TRANSITIONS=48} [2023-11-26 11:43:54,548 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 1 predicate places. [2023-11-26 11:43:54,552 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 48 transitions, 138 flow [2023-11-26 11:43:54,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:43:54,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:43:54,554 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:43:54,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-26 11:43:54,554 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-26 11:43:54,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:43:54,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1092804233, now seen corresponding path program 1 times [2023-11-26 11:43:54,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:43:54,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833092528] [2023-11-26 11:43:54,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:43:54,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:43:54,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:43:55,426 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:43:55,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:43:55,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833092528] [2023-11-26 11:43:55,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833092528] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:43:55,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76168522] [2023-11-26 11:43:55,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:43:55,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:43:55,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5e54725-9257-44fd-9e16-f08f239a5278/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:43:55,434 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5e54725-9257-44fd-9e16-f08f239a5278/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:43:55,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5e54725-9257-44fd-9e16-f08f239a5278/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:43:55,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:43:55,636 INFO L262 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-26 11:43:55,645 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:43:55,711 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-26 11:43:55,900 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-26 11:43:55,964 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:43:55,964 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:43:56,518 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:43:56,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76168522] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:43:56,519 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:43:56,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 8] total 21 [2023-11-26 11:43:56,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505878327] [2023-11-26 11:43:56,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:43:56,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-26 11:43:56,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:43:56,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-26 11:43:56,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2023-11-26 11:43:56,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2023-11-26 11:43:56,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 48 transitions, 138 flow. Second operand has 21 states, 21 states have (on average 17.80952380952381) internal successors, (374), 21 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:43:56,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:43:56,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2023-11-26 11:43:56,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:44:13,155 INFO L124 PetriNetUnfolderBase]: 86239/124460 cut-off events. [2023-11-26 11:44:13,156 INFO L125 PetriNetUnfolderBase]: For 39724/39724 co-relation queries the response was YES. [2023-11-26 11:44:13,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 293929 conditions, 124460 events. 86239/124460 cut-off events. For 39724/39724 co-relation queries the response was YES. Maximal size of possible extension queue 4683. Compared 959432 event pairs, 2498 based on Foata normal form. 15/124443 useless extension candidates. Maximal degree in co-relation 293915. Up to 17409 conditions per place. [2023-11-26 11:44:13,922 INFO L140 encePairwiseOnDemand]: 35/49 looper letters, 501 selfloop transitions, 80 changer transitions 580/1170 dead transitions. [2023-11-26 11:44:13,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 1170 transitions, 5804 flow [2023-11-26 11:44:13,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-11-26 11:44:13,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2023-11-26 11:44:13,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 1890 transitions. [2023-11-26 11:44:13,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6221198156682027 [2023-11-26 11:44:13,934 INFO L72 ComplementDD]: Start complementDD. Operand 62 states and 1890 transitions. [2023-11-26 11:44:13,934 INFO L73 IsDeterministic]: Start isDeterministic. Operand 62 states and 1890 transitions. [2023-11-26 11:44:13,936 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:44:13,936 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 62 states and 1890 transitions. [2023-11-26 11:44:13,945 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 63 states, 62 states have (on average 30.483870967741936) internal successors, (1890), 62 states have internal predecessors, (1890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:13,957 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 63 states, 63 states have (on average 49.0) internal successors, (3087), 63 states have internal predecessors, (3087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:13,962 INFO L81 ComplementDD]: Finished complementDD. Result has 63 states, 63 states have (on average 49.0) internal successors, (3087), 63 states have internal predecessors, (3087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:13,962 INFO L175 Difference]: Start difference. First operand has 54 places, 48 transitions, 138 flow. Second operand 62 states and 1890 transitions. [2023-11-26 11:44:13,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 1170 transitions, 5804 flow [2023-11-26 11:44:16,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 1170 transitions, 5800 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-26 11:44:16,139 INFO L231 Difference]: Finished difference. Result has 171 places, 132 transitions, 897 flow [2023-11-26 11:44:16,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=62, PETRI_FLOW=897, PETRI_PLACES=171, PETRI_TRANSITIONS=132} [2023-11-26 11:44:16,140 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 118 predicate places. [2023-11-26 11:44:16,140 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 132 transitions, 897 flow [2023-11-26 11:44:16,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 17.80952380952381) internal successors, (374), 21 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:16,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:44:16,141 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:44:16,149 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5e54725-9257-44fd-9e16-f08f239a5278/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-26 11:44:16,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5e54725-9257-44fd-9e16-f08f239a5278/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:44:16,348 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-26 11:44:16,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:44:16,349 INFO L85 PathProgramCache]: Analyzing trace with hash 454790613, now seen corresponding path program 2 times [2023-11-26 11:44:16,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:44:16,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797509269] [2023-11-26 11:44:16,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:16,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:44:16,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:16,970 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-26 11:44:16,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:44:16,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797509269] [2023-11-26 11:44:16,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797509269] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:44:16,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:44:16,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:44:16,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144780790] [2023-11-26 11:44:16,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:44:16,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:44:16,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:44:16,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:44:16,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:44:16,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2023-11-26 11:44:16,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 132 transitions, 897 flow. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:16,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:44:16,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2023-11-26 11:44:16,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand