./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6a613e3-bc15-45ea-aa9e-28f8f5ba8911/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6a613e3-bc15-45ea-aa9e-28f8f5ba8911/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_e6a613e3-bc15-45ea-aa9e-28f8f5ba8911/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6a613e3-bc15-45ea-aa9e-28f8f5ba8911/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6a613e3-bc15-45ea-aa9e-28f8f5ba8911/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_e6a613e3-bc15-45ea-aa9e-28f8f5ba8911/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 0224e82797c7b26c7800eaf85be5e5678e7961d21aa4e2312eda2860d261b33a --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 12:04:50,822 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 12:04:50,915 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6a613e3-bc15-45ea-aa9e-28f8f5ba8911/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 12:04:50,921 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 12:04:50,922 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 12:04:50,948 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 12:04:50,949 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 12:04:50,949 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 12:04:50,950 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 12:04:50,951 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 12:04:50,951 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 12:04:50,952 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 12:04:50,953 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 12:04:50,954 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 12:04:50,954 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 12:04:50,955 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 12:04:50,956 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 12:04:50,956 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 12:04:50,957 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 12:04:50,958 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 12:04:50,958 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 12:04:50,959 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 12:04:50,960 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 12:04:50,960 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 12:04:50,961 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 12:04:50,961 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 12:04:50,962 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 12:04:50,963 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 12:04:50,963 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 12:04:50,964 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 12:04:50,964 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 12:04:50,965 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 12:04:50,966 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 12:04:50,967 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 12:04:50,967 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 12:04:50,967 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 12:04:50,968 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 12:04:50,968 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 12:04:50,968 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 12:04:50,969 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 12:04:50,969 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 12:04:50,970 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 12:04:50,970 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_e6a613e3-bc15-45ea-aa9e-28f8f5ba8911/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6a613e3-bc15-45ea-aa9e-28f8f5ba8911/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0224e82797c7b26c7800eaf85be5e5678e7961d21aa4e2312eda2860d261b33a [2023-11-26 12:04:51,306 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 12:04:51,333 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 12:04:51,335 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 12:04:51,337 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 12:04:51,337 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 12:04:51,338 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6a613e3-bc15-45ea-aa9e-28f8f5ba8911/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c [2023-11-26 12:04:54,593 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 12:04:54,827 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 12:04:54,828 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6a613e3-bc15-45ea-aa9e-28f8f5ba8911/sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c [2023-11-26 12:04:54,837 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6a613e3-bc15-45ea-aa9e-28f8f5ba8911/bin/uautomizer-verify-VRDe98Ueme/data/41319b5ed/7d077199e6db4ec0b7ed1b6a53a828b2/FLAG681d7f97f [2023-11-26 12:04:54,851 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6a613e3-bc15-45ea-aa9e-28f8f5ba8911/bin/uautomizer-verify-VRDe98Ueme/data/41319b5ed/7d077199e6db4ec0b7ed1b6a53a828b2 [2023-11-26 12:04:54,854 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 12:04:54,855 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 12:04:54,857 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 12:04:54,857 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 12:04:54,862 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 12:04:54,863 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:04:54" (1/1) ... [2023-11-26 12:04:54,864 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@432b660d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:54, skipping insertion in model container [2023-11-26 12:04:54,865 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:04:54" (1/1) ... [2023-11-26 12:04:54,891 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 12:04:55,070 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_e6a613e3-bc15-45ea-aa9e-28f8f5ba8911/sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c[2625,2638] [2023-11-26 12:04:55,079 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 12:04:55,089 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 12:04:55,135 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_e6a613e3-bc15-45ea-aa9e-28f8f5ba8911/sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c[2625,2638] [2023-11-26 12:04:55,139 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 12:04:55,147 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 12:04:55,148 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 12:04:55,156 INFO L206 MainTranslator]: Completed translation [2023-11-26 12:04:55,156 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:55 WrapperNode [2023-11-26 12:04:55,156 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 12:04:55,158 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 12:04:55,158 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 12:04:55,158 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 12:04:55,166 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:55" (1/1) ... [2023-11-26 12:04:55,196 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:55" (1/1) ... [2023-11-26 12:04:55,221 INFO L138 Inliner]: procedures = 24, calls = 43, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 105 [2023-11-26 12:04:55,221 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 12:04:55,222 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 12:04:55,222 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 12:04:55,223 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 12:04:55,234 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:55" (1/1) ... [2023-11-26 12:04:55,235 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:55" (1/1) ... [2023-11-26 12:04:55,238 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:55" (1/1) ... [2023-11-26 12:04:55,255 INFO L175 MemorySlicer]: Split 15 memory accesses to 5 slices as follows [2, 7, 2, 2, 2]. 47 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 4 writes are split as follows [0, 1, 1, 1, 1]. [2023-11-26 12:04:55,256 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:55" (1/1) ... [2023-11-26 12:04:55,256 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:55" (1/1) ... [2023-11-26 12:04:55,270 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:55" (1/1) ... [2023-11-26 12:04:55,275 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:55" (1/1) ... [2023-11-26 12:04:55,277 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:55" (1/1) ... [2023-11-26 12:04:55,279 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:55" (1/1) ... [2023-11-26 12:04:55,292 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 12:04:55,293 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 12:04:55,294 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 12:04:55,294 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 12:04:55,295 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:55" (1/1) ... [2023-11-26 12:04:55,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 12:04:55,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6a613e3-bc15-45ea-aa9e-28f8f5ba8911/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:04:55,331 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6a613e3-bc15-45ea-aa9e-28f8f5ba8911/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 12:04:55,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6a613e3-bc15-45ea-aa9e-28f8f5ba8911/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 12:04:55,372 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 12:04:55,372 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-26 12:04:55,373 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-26 12:04:55,373 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-26 12:04:55,373 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-26 12:04:55,373 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-26 12:04:55,374 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-26 12:04:55,374 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 12:04:55,374 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 12:04:55,374 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 12:04:55,374 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-26 12:04:55,375 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-26 12:04:55,375 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 12:04:55,375 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 12:04:55,375 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 12:04:55,375 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 12:04:55,376 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-26 12:04:55,376 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-26 12:04:55,376 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-26 12:04:55,376 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-26 12:04:55,377 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-26 12:04:55,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 12:04:55,377 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 12:04:55,377 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 12:04:55,377 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 12:04:55,378 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-26 12:04:55,378 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-26 12:04:55,378 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-26 12:04:55,378 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 12:04:55,380 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 12:04:55,546 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 12:04:55,549 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 12:04:55,908 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 12:04:56,205 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 12:04:56,205 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-26 12:04:56,205 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:04:56 BoogieIcfgContainer [2023-11-26 12:04:56,205 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 12:04:56,208 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 12:04:56,208 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 12:04:56,218 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 12:04:56,218 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:04:54" (1/3) ... [2023-11-26 12:04:56,219 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c54de30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:04:56, skipping insertion in model container [2023-11-26 12:04:56,220 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:55" (2/3) ... [2023-11-26 12:04:56,221 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c54de30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:04:56, skipping insertion in model container [2023-11-26 12:04:56,222 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:04:56" (3/3) ... [2023-11-26 12:04:56,223 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-min-array-hom.wvr.c [2023-11-26 12:04:56,236 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-26 12:04:56,247 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 12:04:56,247 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 12:04:56,247 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-26 12:04:56,351 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-26 12:04:56,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 35 transitions, 91 flow [2023-11-26 12:04:56,441 INFO L124 PetriNetUnfolderBase]: 4/32 cut-off events. [2023-11-26 12:04:56,442 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-26 12:04:56,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45 conditions, 32 events. 4/32 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 43 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 24. Up to 2 conditions per place. [2023-11-26 12:04:56,446 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 35 transitions, 91 flow [2023-11-26 12:04:56,449 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 37 places, 31 transitions, 80 flow [2023-11-26 12:04:56,459 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 12:04:56,466 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;@1615c0c1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 12:04:56,466 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-26 12:04:56,479 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-26 12:04:56,480 INFO L124 PetriNetUnfolderBase]: 4/30 cut-off events. [2023-11-26 12:04:56,480 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-26 12:04:56,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:04:56,481 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] [2023-11-26 12:04:56,481 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-26 12:04:56,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:04:56,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1064244367, now seen corresponding path program 1 times [2023-11-26 12:04:56,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:04:56,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490166793] [2023-11-26 12:04:56,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:04:56,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:04:56,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:04:57,048 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 12:04:57,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:04:57,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490166793] [2023-11-26 12:04:57,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490166793] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:04:57,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:04:57,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 12:04:57,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352605502] [2023-11-26 12:04:57,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:04:57,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 12:04:57,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:04:57,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 12:04:57,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 12:04:57,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2023-11-26 12:04:57,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 31 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states 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 12:04:57,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:04:57,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2023-11-26 12:04:57,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 12:04:57,383 INFO L124 PetriNetUnfolderBase]: 674/1036 cut-off events. [2023-11-26 12:04:57,383 INFO L125 PetriNetUnfolderBase]: For 81/81 co-relation queries the response was YES. [2023-11-26 12:04:57,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2120 conditions, 1036 events. 674/1036 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 4101 event pairs, 140 based on Foata normal form. 1/1023 useless extension candidates. Maximal degree in co-relation 1708. Up to 740 conditions per place. [2023-11-26 12:04:57,397 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 41 selfloop transitions, 4 changer transitions 1/50 dead transitions. [2023-11-26 12:04:57,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 50 transitions, 225 flow [2023-11-26 12:04:57,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 12:04:57,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 12:04:57,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 68 transitions. [2023-11-26 12:04:57,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6476190476190476 [2023-11-26 12:04:57,410 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 68 transitions. [2023-11-26 12:04:57,411 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 68 transitions. [2023-11-26 12:04:57,412 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 12:04:57,414 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 68 transitions. [2023-11-26 12:04:57,417 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states 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 12:04:57,420 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:57,420 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:57,422 INFO L175 Difference]: Start difference. First operand has 37 places, 31 transitions, 80 flow. Second operand 3 states and 68 transitions. [2023-11-26 12:04:57,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 50 transitions, 225 flow [2023-11-26 12:04:57,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 50 transitions, 203 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-26 12:04:57,431 INFO L231 Difference]: Finished difference. Result has 34 places, 34 transitions, 94 flow [2023-11-26 12:04:57,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=34, PETRI_TRANSITIONS=34} [2023-11-26 12:04:57,437 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -3 predicate places. [2023-11-26 12:04:57,437 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 34 transitions, 94 flow [2023-11-26 12:04:57,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states 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 12:04:57,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:04:57,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:04:57,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 12:04:57,438 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-26 12:04:57,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:04:57,439 INFO L85 PathProgramCache]: Analyzing trace with hash 937462874, now seen corresponding path program 1 times [2023-11-26 12:04:57,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:04:57,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938140376] [2023-11-26 12:04:57,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:04:57,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:04:57,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:04:57,634 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 12:04:57,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:04:57,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938140376] [2023-11-26 12:04:57,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938140376] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:04:57,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:04:57,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 12:04:57,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928833476] [2023-11-26 12:04:57,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:04:57,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 12:04:57,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:04:57,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 12:04:57,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 12:04:57,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2023-11-26 12:04:57,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 34 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states 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 12:04:57,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:04:57,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2023-11-26 12:04:57,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 12:04:57,890 INFO L124 PetriNetUnfolderBase]: 674/1032 cut-off events. [2023-11-26 12:04:57,890 INFO L125 PetriNetUnfolderBase]: For 211/211 co-relation queries the response was YES. [2023-11-26 12:04:57,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2349 conditions, 1032 events. 674/1032 cut-off events. For 211/211 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 4207 event pairs, 447 based on Foata normal form. 0/1002 useless extension candidates. Maximal degree in co-relation 875. Up to 984 conditions per place. [2023-11-26 12:04:57,901 INFO L140 encePairwiseOnDemand]: 32/35 looper letters, 29 selfloop transitions, 2 changer transitions 0/35 dead transitions. [2023-11-26 12:04:57,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 35 transitions, 158 flow [2023-11-26 12:04:57,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 12:04:57,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 12:04:57,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 50 transitions. [2023-11-26 12:04:57,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2023-11-26 12:04:57,904 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 50 transitions. [2023-11-26 12:04:57,904 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 50 transitions. [2023-11-26 12:04:57,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 12:04:57,904 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 50 transitions. [2023-11-26 12:04:57,905 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states 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 12:04:57,906 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:57,907 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:57,907 INFO L175 Difference]: Start difference. First operand has 34 places, 34 transitions, 94 flow. Second operand 3 states and 50 transitions. [2023-11-26 12:04:57,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 35 transitions, 158 flow [2023-11-26 12:04:57,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 35 transitions, 154 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 12:04:57,910 INFO L231 Difference]: Finished difference. Result has 36 places, 35 transitions, 102 flow [2023-11-26 12:04:57,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=36, PETRI_TRANSITIONS=35} [2023-11-26 12:04:57,911 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -1 predicate places. [2023-11-26 12:04:57,911 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 35 transitions, 102 flow [2023-11-26 12:04:57,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states 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 12:04:57,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:04:57,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:04:57,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 12:04:57,912 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-26 12:04:57,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:04:57,913 INFO L85 PathProgramCache]: Analyzing trace with hash 200410163, now seen corresponding path program 1 times [2023-11-26 12:04:57,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:04:57,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410289654] [2023-11-26 12:04:57,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:04:57,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:04:57,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:04:58,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 12:04:58,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:04:58,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410289654] [2023-11-26 12:04:58,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410289654] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:04:58,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:04:58,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 12:04:58,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524229094] [2023-11-26 12:04:58,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:04:58,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 12:04:58,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:04:58,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 12:04:58,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 12:04:58,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2023-11-26 12:04:58,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 35 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states 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 12:04:58,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:04:58,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2023-11-26 12:04:58,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 12:04:58,340 INFO L124 PetriNetUnfolderBase]: 865/1276 cut-off events. [2023-11-26 12:04:58,340 INFO L125 PetriNetUnfolderBase]: For 190/190 co-relation queries the response was YES. [2023-11-26 12:04:58,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2825 conditions, 1276 events. 865/1276 cut-off events. For 190/190 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 5130 event pairs, 265 based on Foata normal form. 0/1226 useless extension candidates. Maximal degree in co-relation 2812. Up to 649 conditions per place. [2023-11-26 12:04:58,352 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 44 selfloop transitions, 4 changer transitions 0/51 dead transitions. [2023-11-26 12:04:58,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 51 transitions, 240 flow [2023-11-26 12:04:58,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 12:04:58,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 12:04:58,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 67 transitions. [2023-11-26 12:04:58,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4785714285714286 [2023-11-26 12:04:58,354 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 67 transitions. [2023-11-26 12:04:58,355 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 67 transitions. [2023-11-26 12:04:58,355 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 12:04:58,355 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 67 transitions. [2023-11-26 12:04:58,356 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states 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 12:04:58,357 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 35.0) internal successors, (175), 5 states have internal predecessors, (175), 0 states have call successors, (0), 0 states 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 12:04:58,357 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 35.0) internal successors, (175), 5 states have internal predecessors, (175), 0 states have call successors, (0), 0 states 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 12:04:58,357 INFO L175 Difference]: Start difference. First operand has 36 places, 35 transitions, 102 flow. Second operand 4 states and 67 transitions. [2023-11-26 12:04:58,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 51 transitions, 240 flow [2023-11-26 12:04:58,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 51 transitions, 234 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-26 12:04:58,360 INFO L231 Difference]: Finished difference. Result has 40 places, 36 transitions, 117 flow [2023-11-26 12:04:58,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=117, PETRI_PLACES=40, PETRI_TRANSITIONS=36} [2023-11-26 12:04:58,362 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 3 predicate places. [2023-11-26 12:04:58,362 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 36 transitions, 117 flow [2023-11-26 12:04:58,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states 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 12:04:58,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:04:58,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:04:58,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 12:04:58,363 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-26 12:04:58,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:04:58,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1953148681, now seen corresponding path program 1 times [2023-11-26 12:04:58,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:04:58,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013432159] [2023-11-26 12:04:58,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:04:58,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:04:58,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:04:58,496 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 12:04:58,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:04:58,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013432159] [2023-11-26 12:04:58,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013432159] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:04:58,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928280482] [2023-11-26 12:04:58,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:04:58,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:04:58,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6a613e3-bc15-45ea-aa9e-28f8f5ba8911/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:04:58,502 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6a613e3-bc15-45ea-aa9e-28f8f5ba8911/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:04:58,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6a613e3-bc15-45ea-aa9e-28f8f5ba8911/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 12:04:58,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:04:58,651 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 12:04:58,658 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:04:58,757 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 12:04:58,758 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:04:58,815 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 12:04:58,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928280482] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-26 12:04:58,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-26 12:04:58,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-11-26 12:04:58,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881197509] [2023-11-26 12:04:58,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:04:58,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 12:04:58,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:04:58,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 12:04:58,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-26 12:04:58,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2023-11-26 12:04:58,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 36 transitions, 117 flow. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 states 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 12:04:58,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:04:58,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2023-11-26 12:04:58,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 12:04:59,080 INFO L124 PetriNetUnfolderBase]: 898/1343 cut-off events. [2023-11-26 12:04:59,081 INFO L125 PetriNetUnfolderBase]: For 585/585 co-relation queries the response was YES. [2023-11-26 12:04:59,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3365 conditions, 1343 events. 898/1343 cut-off events. For 585/585 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 5622 event pairs, 253 based on Foata normal form. 0/1279 useless extension candidates. Maximal degree in co-relation 3345. Up to 668 conditions per place. [2023-11-26 12:04:59,095 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 43 selfloop transitions, 5 changer transitions 0/52 dead transitions. [2023-11-26 12:04:59,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 52 transitions, 265 flow [2023-11-26 12:04:59,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 12:04:59,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 12:04:59,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 74 transitions. [2023-11-26 12:04:59,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4228571428571429 [2023-11-26 12:04:59,098 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 74 transitions. [2023-11-26 12:04:59,098 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 74 transitions. [2023-11-26 12:04:59,099 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 12:04:59,099 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 74 transitions. [2023-11-26 12:04:59,100 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:59,101 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 35.0) internal successors, (210), 6 states have internal predecessors, (210), 0 states have call successors, (0), 0 states 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 12:04:59,101 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 35.0) internal successors, (210), 6 states have internal predecessors, (210), 0 states have call successors, (0), 0 states 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 12:04:59,101 INFO L175 Difference]: Start difference. First operand has 40 places, 36 transitions, 117 flow. Second operand 5 states and 74 transitions. [2023-11-26 12:04:59,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 52 transitions, 265 flow [2023-11-26 12:04:59,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 52 transitions, 259 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 12:04:59,106 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 136 flow [2023-11-26 12:04:59,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=136, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2023-11-26 12:04:59,107 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 7 predicate places. [2023-11-26 12:04:59,108 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 136 flow [2023-11-26 12:04:59,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 states 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 12:04:59,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:04:59,113 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] [2023-11-26 12:04:59,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6a613e3-bc15-45ea-aa9e-28f8f5ba8911/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 12:04:59,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6a613e3-bc15-45ea-aa9e-28f8f5ba8911/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:04:59,326 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-26 12:04:59,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:04:59,327 INFO L85 PathProgramCache]: Analyzing trace with hash -239191844, now seen corresponding path program 1 times [2023-11-26 12:04:59,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:04:59,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552947671] [2023-11-26 12:04:59,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:04:59,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:04:59,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:00,489 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:05:00,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:05:00,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552947671] [2023-11-26 12:05:00,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552947671] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:05:00,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307234290] [2023-11-26 12:05:00,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:05:00,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:05:00,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6a613e3-bc15-45ea-aa9e-28f8f5ba8911/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:05:00,492 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6a613e3-bc15-45ea-aa9e-28f8f5ba8911/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:05:00,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6a613e3-bc15-45ea-aa9e-28f8f5ba8911/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 12:05:00,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:00,634 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-26 12:05:00,637 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:05:00,706 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 12:05:01,100 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 59 treesize of output 35 [2023-11-26 12:05:01,259 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:05:01,259 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:05:04,414 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 282 treesize of output 254 [2023-11-26 12:05:04,526 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 12:05:04,527 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 372 treesize of output 376 [2023-11-26 12:05:27,626 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 226 treesize of output 208 [2023-11-26 12:05:27,726 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 12:05:27,726 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 261 treesize of output 291 [2023-11-26 12:05:33,744 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:05:33,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307234290] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:05:33,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:05:33,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 22 [2023-11-26 12:05:33,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199173197] [2023-11-26 12:05:33,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:05:33,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-26 12:05:33,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:05:33,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-26 12:05:33,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2023-11-26 12:05:34,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2023-11-26 12:05:34,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 136 flow. Second operand has 23 states, 23 states have (on average 8.91304347826087) internal successors, (205), 23 states have internal predecessors, (205), 0 states have call successors, (0), 0 states 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 12:05:34,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:05:34,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2023-11-26 12:05:34,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 12:05:37,573 INFO L124 PetriNetUnfolderBase]: 1993/3005 cut-off events. [2023-11-26 12:05:37,574 INFO L125 PetriNetUnfolderBase]: For 1852/1852 co-relation queries the response was YES. [2023-11-26 12:05:37,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8274 conditions, 3005 events. 1993/3005 cut-off events. For 1852/1852 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 13906 event pairs, 114 based on Foata normal form. 1/3005 useless extension candidates. Maximal degree in co-relation 6106. Up to 1481 conditions per place. [2023-11-26 12:05:37,604 INFO L140 encePairwiseOnDemand]: 24/35 looper letters, 151 selfloop transitions, 57 changer transitions 1/213 dead transitions. [2023-11-26 12:05:37,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 213 transitions, 1123 flow [2023-11-26 12:05:37,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-26 12:05:37,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-26 12:05:37,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 335 transitions. [2023-11-26 12:05:37,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4557823129251701 [2023-11-26 12:05:37,611 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 335 transitions. [2023-11-26 12:05:37,611 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 335 transitions. [2023-11-26 12:05:37,612 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 12:05:37,612 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 335 transitions. [2023-11-26 12:05:37,615 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 15.952380952380953) internal successors, (335), 21 states have internal predecessors, (335), 0 states have call successors, (0), 0 states 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 12:05:37,620 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 35.0) internal successors, (770), 22 states have internal predecessors, (770), 0 states have call successors, (0), 0 states 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 12:05:37,621 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 35.0) internal successors, (770), 22 states have internal predecessors, (770), 0 states have call successors, (0), 0 states 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 12:05:37,621 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 136 flow. Second operand 21 states and 335 transitions. [2023-11-26 12:05:37,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 213 transitions, 1123 flow [2023-11-26 12:05:37,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 213 transitions, 1106 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-26 12:05:37,636 INFO L231 Difference]: Finished difference. Result has 66 places, 93 transitions, 547 flow [2023-11-26 12:05:37,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=547, PETRI_PLACES=66, PETRI_TRANSITIONS=93} [2023-11-26 12:05:37,639 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 29 predicate places. [2023-11-26 12:05:37,640 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 93 transitions, 547 flow [2023-11-26 12:05:37,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 8.91304347826087) internal successors, (205), 23 states have internal predecessors, (205), 0 states have call successors, (0), 0 states 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 12:05:37,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:05:37,640 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] [2023-11-26 12:05:37,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6a613e3-bc15-45ea-aa9e-28f8f5ba8911/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 12:05:37,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6a613e3-bc15-45ea-aa9e-28f8f5ba8911/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:05:37,847 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-26 12:05:37,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:05:37,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1087062616, now seen corresponding path program 2 times [2023-11-26 12:05:37,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:05:37,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474778281] [2023-11-26 12:05:37,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:05:37,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:05:37,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:38,739 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:05:38,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:05:38,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474778281] [2023-11-26 12:05:38,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474778281] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:05:38,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767020615] [2023-11-26 12:05:38,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 12:05:38,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:05:38,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6a613e3-bc15-45ea-aa9e-28f8f5ba8911/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:05:38,742 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6a613e3-bc15-45ea-aa9e-28f8f5ba8911/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:05:38,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6a613e3-bc15-45ea-aa9e-28f8f5ba8911/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 12:05:38,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 12:05:38,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 12:05:38,897 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-26 12:05:38,900 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:05:38,937 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 12:05:39,242 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 58 treesize of output 34 [2023-11-26 12:05:39,326 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:05:39,326 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:05:41,741 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 282 treesize of output 254 [2023-11-26 12:05:41,850 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 12:05:41,851 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 372 treesize of output 376