./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a0165632 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_70544ddf-2e22-40fe-9627-553c63dfed6b/bin/uautomizer-verify-jihMAELWvX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70544ddf-2e22-40fe-9627-553c63dfed6b/bin/uautomizer-verify-jihMAELWvX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70544ddf-2e22-40fe-9627-553c63dfed6b/bin/uautomizer-verify-jihMAELWvX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70544ddf-2e22-40fe-9627-553c63dfed6b/bin/uautomizer-verify-jihMAELWvX/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70544ddf-2e22-40fe-9627-553c63dfed6b/bin/uautomizer-verify-jihMAELWvX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70544ddf-2e22-40fe-9627-553c63dfed6b/bin/uautomizer-verify-jihMAELWvX --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d2c89f010e0f73e8ba7e81bb150b82b70d39c0827c0d616dd2c3347839d51e01 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-08 16:21:39,033 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-08 16:21:39,135 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70544ddf-2e22-40fe-9627-553c63dfed6b/bin/uautomizer-verify-jihMAELWvX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-08 16:21:39,141 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-08 16:21:39,142 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-08 16:21:39,172 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-08 16:21:39,172 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-08 16:21:39,173 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-08 16:21:39,174 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-08 16:21:39,175 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-08 16:21:39,175 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-08 16:21:39,176 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-08 16:21:39,177 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-08 16:21:39,177 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-08 16:21:39,178 INFO L153 SettingsManager]: * Use SBE=true [2024-11-08 16:21:39,179 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-08 16:21:39,179 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-08 16:21:39,180 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-08 16:21:39,181 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-08 16:21:39,181 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-08 16:21:39,182 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-08 16:21:39,184 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-08 16:21:39,185 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-08 16:21:39,185 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-08 16:21:39,186 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-08 16:21:39,186 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-08 16:21:39,187 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-08 16:21:39,187 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-08 16:21:39,187 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-08 16:21:39,188 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-08 16:21:39,188 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-08 16:21:39,189 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-08 16:21:39,189 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-08 16:21:39,190 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 16:21:39,190 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-08 16:21:39,191 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-08 16:21:39,191 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-08 16:21:39,192 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-08 16:21:39,192 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-08 16:21:39,193 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-08 16:21:39,193 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-08 16:21:39,194 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-08 16:21:39,194 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_70544ddf-2e22-40fe-9627-553c63dfed6b/bin/uautomizer-verify-jihMAELWvX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70544ddf-2e22-40fe-9627-553c63dfed6b/bin/uautomizer-verify-jihMAELWvX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d2c89f010e0f73e8ba7e81bb150b82b70d39c0827c0d616dd2c3347839d51e01 [2024-11-08 16:21:39,500 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-08 16:21:39,532 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-08 16:21:39,534 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-08 16:21:39,536 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-08 16:21:39,538 INFO L274 PluginConnector]: CDTParser initialized [2024-11-08 16:21:39,540 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70544ddf-2e22-40fe-9627-553c63dfed6b/bin/uautomizer-verify-jihMAELWvX/../../sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c Unable to find full path for "g++" [2024-11-08 16:21:41,965 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-08 16:21:42,170 INFO L384 CDTParser]: Found 1 translation units. [2024-11-08 16:21:42,171 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70544ddf-2e22-40fe-9627-553c63dfed6b/sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c [2024-11-08 16:21:42,181 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70544ddf-2e22-40fe-9627-553c63dfed6b/bin/uautomizer-verify-jihMAELWvX/data/79d7d0949/e043fdde985f4805a7df611da1167098/FLAGd723615ef [2024-11-08 16:21:42,198 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70544ddf-2e22-40fe-9627-553c63dfed6b/bin/uautomizer-verify-jihMAELWvX/data/79d7d0949/e043fdde985f4805a7df611da1167098 [2024-11-08 16:21:42,201 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-08 16:21:42,203 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-08 16:21:42,205 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-08 16:21:42,205 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-08 16:21:42,211 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-08 16:21:42,212 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 04:21:42" (1/1) ... [2024-11-08 16:21:42,213 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b37123b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:21:42, skipping insertion in model container [2024-11-08 16:21:42,214 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 04:21:42" (1/1) ... [2024-11-08 16:21:42,243 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-08 16:21:42,494 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-08 16:21:42,497 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 16:21:42,513 INFO L200 MainTranslator]: Completed pre-run [2024-11-08 16:21:42,587 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 16:21:42,623 INFO L204 MainTranslator]: Completed translation [2024-11-08 16:21:42,627 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:21:42 WrapperNode [2024-11-08 16:21:42,627 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-08 16:21:42,629 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-08 16:21:42,629 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-08 16:21:42,629 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-08 16:21:42,652 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:21:42" (1/1) ... [2024-11-08 16:21:42,680 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:21:42" (1/1) ... [2024-11-08 16:21:42,725 INFO L138 Inliner]: procedures = 24, calls = 41, calls flagged for inlining = 17, calls inlined = 19, statements flattened = 236 [2024-11-08 16:21:42,726 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-08 16:21:42,727 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-08 16:21:42,727 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-08 16:21:42,727 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-08 16:21:42,744 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:21:42" (1/1) ... [2024-11-08 16:21:42,744 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:21:42" (1/1) ... [2024-11-08 16:21:42,748 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:21:42" (1/1) ... [2024-11-08 16:21:42,792 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [2, 7]. 78 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-11-08 16:21:42,792 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:21:42" (1/1) ... [2024-11-08 16:21:42,792 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:21:42" (1/1) ... [2024-11-08 16:21:42,801 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:21:42" (1/1) ... [2024-11-08 16:21:42,806 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:21:42" (1/1) ... [2024-11-08 16:21:42,808 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:21:42" (1/1) ... [2024-11-08 16:21:42,810 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:21:42" (1/1) ... [2024-11-08 16:21:42,813 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-08 16:21:42,814 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-08 16:21:42,814 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-08 16:21:42,814 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-08 16:21:42,815 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:21:42" (1/1) ... [2024-11-08 16:21:42,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 16:21:42,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70544ddf-2e22-40fe-9627-553c63dfed6b/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:21:42,856 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70544ddf-2e22-40fe-9627-553c63dfed6b/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-08 16:21:42,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70544ddf-2e22-40fe-9627-553c63dfed6b/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-08 16:21:42,897 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-08 16:21:42,897 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-08 16:21:42,897 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-08 16:21:42,898 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-08 16:21:42,899 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-08 16:21:42,899 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-08 16:21:42,899 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-08 16:21:42,899 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-08 16:21:42,900 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-08 16:21:42,900 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-08 16:21:42,900 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-08 16:21:42,900 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-08 16:21:42,900 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-08 16:21:42,900 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-08 16:21:42,901 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-08 16:21:42,901 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-08 16:21:42,901 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-08 16:21:42,901 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-08 16:21:42,906 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-08 16:21:43,081 INFO L238 CfgBuilder]: Building ICFG [2024-11-08 16:21:43,084 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-08 16:21:43,691 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-08 16:21:43,691 INFO L287 CfgBuilder]: Performing block encoding [2024-11-08 16:21:44,119 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-08 16:21:44,119 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-08 16:21:44,120 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 04:21:44 BoogieIcfgContainer [2024-11-08 16:21:44,120 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-08 16:21:44,124 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-08 16:21:44,124 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-08 16:21:44,128 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-08 16:21:44,128 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.11 04:21:42" (1/3) ... [2024-11-08 16:21:44,129 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@574d8769 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 04:21:44, skipping insertion in model container [2024-11-08 16:21:44,129 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:21:42" (2/3) ... [2024-11-08 16:21:44,130 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@574d8769 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 04:21:44, skipping insertion in model container [2024-11-08 16:21:44,130 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 04:21:44" (3/3) ... [2024-11-08 16:21:44,131 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-queue-add-3.wvr.c [2024-11-08 16:21:44,155 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-08 16:21:44,155 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2024-11-08 16:21:44,156 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-08 16:21:44,230 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-08 16:21:44,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 71 places, 71 transitions, 163 flow [2024-11-08 16:21:44,349 INFO L124 PetriNetUnfolderBase]: 10/68 cut-off events. [2024-11-08 16:21:44,350 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-08 16:21:44,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81 conditions, 68 events. 10/68 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 167 event pairs, 0 based on Foata normal form. 0/42 useless extension candidates. Maximal degree in co-relation 52. Up to 2 conditions per place. [2024-11-08 16:21:44,356 INFO L82 GeneralOperation]: Start removeDead. Operand has 71 places, 71 transitions, 163 flow [2024-11-08 16:21:44,361 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 67 places, 67 transitions, 152 flow [2024-11-08 16:21:44,376 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 16:21:44,386 INFO L333 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, 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;@63be8aa9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 16:21:44,387 INFO L334 AbstractCegarLoop]: Starting to check reachability of 29 error locations. [2024-11-08 16:21:44,396 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-08 16:21:44,396 INFO L124 PetriNetUnfolderBase]: 3/10 cut-off events. [2024-11-08 16:21:44,396 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-08 16:21:44,396 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:21:44,397 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-08 16:21:44,398 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-11-08 16:21:44,404 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:21:44,404 INFO L85 PathProgramCache]: Analyzing trace with hash 22736004, now seen corresponding path program 1 times [2024-11-08 16:21:44,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:21:44,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163609698] [2024-11-08 16:21:44,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:21:44,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:21:44,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:21:44,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:21:44,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:21:44,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163609698] [2024-11-08 16:21:44,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163609698] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:21:44,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:21:44,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-08 16:21:44,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746241414] [2024-11-08 16:21:44,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:21:44,782 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 16:21:44,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:21:44,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 16:21:44,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 16:21:44,849 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 71 [2024-11-08 16:21:44,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 67 transitions, 152 flow. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:21:44,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:21:44,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 71 [2024-11-08 16:21:44,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:21:45,798 INFO L124 PetriNetUnfolderBase]: 2795/4529 cut-off events. [2024-11-08 16:21:45,798 INFO L125 PetriNetUnfolderBase]: For 158/158 co-relation queries the response was YES. [2024-11-08 16:21:45,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8581 conditions, 4529 events. 2795/4529 cut-off events. For 158/158 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 31779 event pairs, 2455 based on Foata normal form. 305/3091 useless extension candidates. Maximal degree in co-relation 8168. Up to 3799 conditions per place. [2024-11-08 16:21:45,847 INFO L140 encePairwiseOnDemand]: 64/71 looper letters, 37 selfloop transitions, 2 changer transitions 0/61 dead transitions. [2024-11-08 16:21:45,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 61 transitions, 218 flow [2024-11-08 16:21:45,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 16:21:45,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 16:21:45,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 122 transitions. [2024-11-08 16:21:45,863 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5727699530516432 [2024-11-08 16:21:45,865 INFO L175 Difference]: Start difference. First operand has 67 places, 67 transitions, 152 flow. Second operand 3 states and 122 transitions. [2024-11-08 16:21:45,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 61 transitions, 218 flow [2024-11-08 16:21:45,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 61 transitions, 206 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-08 16:21:45,884 INFO L231 Difference]: Finished difference. Result has 59 places, 61 transitions, 132 flow [2024-11-08 16:21:45,886 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=59, PETRI_TRANSITIONS=61} [2024-11-08 16:21:45,892 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, -8 predicate places. [2024-11-08 16:21:45,893 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 61 transitions, 132 flow [2024-11-08 16:21:45,893 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:21:45,893 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:21:45,893 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-08 16:21:45,893 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-08 16:21:45,894 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-11-08 16:21:45,894 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:21:45,895 INFO L85 PathProgramCache]: Analyzing trace with hash 22736005, now seen corresponding path program 1 times [2024-11-08 16:21:45,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:21:45,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72326662] [2024-11-08 16:21:45,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:21:45,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:21:45,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:21:46,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:21:46,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:21:46,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72326662] [2024-11-08 16:21:46,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72326662] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:21:46,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:21:46,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 16:21:46,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829031208] [2024-11-08 16:21:46,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:21:46,396 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 16:21:46,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:21:46,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 16:21:46,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-08 16:21:46,486 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 71 [2024-11-08 16:21:46,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 61 transitions, 132 flow. Second operand has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:21:46,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:21:46,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 71 [2024-11-08 16:21:46,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:21:47,387 INFO L124 PetriNetUnfolderBase]: 2796/4534 cut-off events. [2024-11-08 16:21:47,387 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2024-11-08 16:21:47,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8447 conditions, 4534 events. 2796/4534 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 31927 event pairs, 2455 based on Foata normal form. 0/2786 useless extension candidates. Maximal degree in co-relation 8402. Up to 3814 conditions per place. [2024-11-08 16:21:47,433 INFO L140 encePairwiseOnDemand]: 65/71 looper letters, 48 selfloop transitions, 4 changer transitions 0/66 dead transitions. [2024-11-08 16:21:47,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 66 transitions, 246 flow [2024-11-08 16:21:47,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 16:21:47,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 16:21:47,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 134 transitions. [2024-11-08 16:21:47,439 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47183098591549294 [2024-11-08 16:21:47,440 INFO L175 Difference]: Start difference. First operand has 59 places, 61 transitions, 132 flow. Second operand 4 states and 134 transitions. [2024-11-08 16:21:47,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 66 transitions, 246 flow [2024-11-08 16:21:47,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 66 transitions, 242 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 16:21:47,445 INFO L231 Difference]: Finished difference. Result has 62 places, 64 transitions, 157 flow [2024-11-08 16:21:47,445 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=157, PETRI_PLACES=62, PETRI_TRANSITIONS=64} [2024-11-08 16:21:47,446 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, -5 predicate places. [2024-11-08 16:21:47,446 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 64 transitions, 157 flow [2024-11-08 16:21:47,447 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:21:47,447 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:21:47,447 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-08 16:21:47,448 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-08 16:21:47,449 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-11-08 16:21:47,450 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:21:47,450 INFO L85 PathProgramCache]: Analyzing trace with hash 374292337, now seen corresponding path program 1 times [2024-11-08 16:21:47,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:21:47,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137737764] [2024-11-08 16:21:47,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:21:47,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:21:47,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:21:47,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:21:47,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:21:47,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137737764] [2024-11-08 16:21:47,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137737764] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:21:47,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:21:47,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 16:21:47,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555203781] [2024-11-08 16:21:47,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:21:47,959 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 16:21:47,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:21:47,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 16:21:47,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-08 16:21:48,028 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 71 [2024-11-08 16:21:48,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 64 transitions, 157 flow. Second operand has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:21:48,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:21:48,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 71 [2024-11-08 16:21:48,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:21:49,104 INFO L124 PetriNetUnfolderBase]: 2798/4541 cut-off events. [2024-11-08 16:21:49,105 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2024-11-08 16:21:49,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8473 conditions, 4541 events. 2798/4541 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 31828 event pairs, 2455 based on Foata normal form. 0/2794 useless extension candidates. Maximal degree in co-relation 8439. Up to 3814 conditions per place. [2024-11-08 16:21:49,163 INFO L140 encePairwiseOnDemand]: 63/71 looper letters, 51 selfloop transitions, 8 changer transitions 0/73 dead transitions. [2024-11-08 16:21:49,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 73 transitions, 293 flow [2024-11-08 16:21:49,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 16:21:49,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 16:21:49,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 160 transitions. [2024-11-08 16:21:49,169 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4507042253521127 [2024-11-08 16:21:49,169 INFO L175 Difference]: Start difference. First operand has 62 places, 64 transitions, 157 flow. Second operand 5 states and 160 transitions. [2024-11-08 16:21:49,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 73 transitions, 293 flow [2024-11-08 16:21:49,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 73 transitions, 290 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-08 16:21:49,176 INFO L231 Difference]: Finished difference. Result has 67 places, 68 transitions, 196 flow [2024-11-08 16:21:49,177 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=196, PETRI_PLACES=67, PETRI_TRANSITIONS=68} [2024-11-08 16:21:49,179 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 0 predicate places. [2024-11-08 16:21:49,180 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 68 transitions, 196 flow [2024-11-08 16:21:49,180 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:21:49,180 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:21:49,181 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2024-11-08 16:21:49,181 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-08 16:21:49,181 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-11-08 16:21:49,183 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:21:49,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1275757566, now seen corresponding path program 1 times [2024-11-08 16:21:49,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:21:49,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126598592] [2024-11-08 16:21:49,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:21:49,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:21:49,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:21:49,886 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:21:49,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:21:49,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126598592] [2024-11-08 16:21:49,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126598592] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:21:49,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116904928] [2024-11-08 16:21:49,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:21:49,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:21:49,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70544ddf-2e22-40fe-9627-553c63dfed6b/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:21:49,892 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70544ddf-2e22-40fe-9627-553c63dfed6b/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:21:49,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70544ddf-2e22-40fe-9627-553c63dfed6b/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-08 16:21:50,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:21:50,010 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-08 16:21:50,018 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:21:50,139 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 10 treesize of output 9 [2024-11-08 16:21:50,613 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:21:50,614 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:21:50,820 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:21:50,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116904928] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:21:50,821 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:21:50,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 10 [2024-11-08 16:21:50,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359206792] [2024-11-08 16:21:50,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:21:50,822 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-08 16:21:50,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:21:50,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-08 16:21:50,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-11-08 16:21:50,970 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 71 [2024-11-08 16:21:50,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 68 transitions, 196 flow. Second operand has 12 states, 12 states have (on average 21.75) internal successors, (261), 12 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:21:50,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:21:50,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 71 [2024-11-08 16:21:50,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:21:52,193 INFO L124 PetriNetUnfolderBase]: 2799/4546 cut-off events. [2024-11-08 16:21:52,194 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2024-11-08 16:21:52,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8506 conditions, 4546 events. 2799/4546 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 31906 event pairs, 2455 based on Foata normal form. 1/2803 useless extension candidates. Maximal degree in co-relation 8451. Up to 3811 conditions per place. [2024-11-08 16:21:52,240 INFO L140 encePairwiseOnDemand]: 61/71 looper letters, 44 selfloop transitions, 17 changer transitions 0/75 dead transitions. [2024-11-08 16:21:52,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 75 transitions, 344 flow [2024-11-08 16:21:52,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-08 16:21:52,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-08 16:21:52,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 260 transitions. [2024-11-08 16:21:52,245 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.36619718309859156 [2024-11-08 16:21:52,245 INFO L175 Difference]: Start difference. First operand has 67 places, 68 transitions, 196 flow. Second operand 10 states and 260 transitions. [2024-11-08 16:21:52,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 75 transitions, 344 flow [2024-11-08 16:21:52,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 75 transitions, 343 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-08 16:21:52,249 INFO L231 Difference]: Finished difference. Result has 75 places, 71 transitions, 251 flow [2024-11-08 16:21:52,250 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=251, PETRI_PLACES=75, PETRI_TRANSITIONS=71} [2024-11-08 16:21:52,251 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 8 predicate places. [2024-11-08 16:21:52,251 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 71 transitions, 251 flow [2024-11-08 16:21:52,252 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 21.75) internal successors, (261), 12 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:21:52,252 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:21:52,252 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2024-11-08 16:21:52,278 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70544ddf-2e22-40fe-9627-553c63dfed6b/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-08 16:21:52,452 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70544ddf-2e22-40fe-9627-553c63dfed6b/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:21:52,453 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-11-08 16:21:52,454 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:21:52,454 INFO L85 PathProgramCache]: Analyzing trace with hash 808648269, now seen corresponding path program 1 times [2024-11-08 16:21:52,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:21:52,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510064057] [2024-11-08 16:21:52,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:21:52,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:21:52,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:21:52,967 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:21:52,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:21:52,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510064057] [2024-11-08 16:21:52,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510064057] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:21:52,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229692372] [2024-11-08 16:21:52,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:21:52,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:21:52,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70544ddf-2e22-40fe-9627-553c63dfed6b/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:21:52,973 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70544ddf-2e22-40fe-9627-553c63dfed6b/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:21:52,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70544ddf-2e22-40fe-9627-553c63dfed6b/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-08 16:21:53,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:21:53,098 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-08 16:21:53,100 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:21:53,129 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 10 treesize of output 9 [2024-11-08 16:21:53,514 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:21:53,514 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:21:53,850 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:21:53,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229692372] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:21:53,850 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:21:53,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 12 [2024-11-08 16:21:53,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105530684] [2024-11-08 16:21:53,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:21:53,852 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-08 16:21:53,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:21:53,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-08 16:21:53,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2024-11-08 16:21:54,054 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 71 [2024-11-08 16:21:54,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 71 transitions, 251 flow. Second operand has 14 states, 14 states have (on average 21.785714285714285) internal successors, (305), 14 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:21:54,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:21:54,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 71 [2024-11-08 16:21:54,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:21:55,508 INFO L124 PetriNetUnfolderBase]: 2798/4547 cut-off events. [2024-11-08 16:21:55,509 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2024-11-08 16:21:55,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8527 conditions, 4547 events. 2798/4547 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 31899 event pairs, 2455 based on Foata normal form. 5/2811 useless extension candidates. Maximal degree in co-relation 8491. Up to 3801 conditions per place. [2024-11-08 16:21:55,551 INFO L140 encePairwiseOnDemand]: 61/71 looper letters, 46 selfloop transitions, 19 changer transitions 0/79 dead transitions. [2024-11-08 16:21:55,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 79 transitions, 394 flow [2024-11-08 16:21:55,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-08 16:21:55,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-08 16:21:55,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 250 transitions. [2024-11-08 16:21:55,554 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.39123630672926446 [2024-11-08 16:21:55,554 INFO L175 Difference]: Start difference. First operand has 75 places, 71 transitions, 251 flow. Second operand 9 states and 250 transitions. [2024-11-08 16:21:55,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 79 transitions, 394 flow [2024-11-08 16:21:55,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 79 transitions, 350 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-11-08 16:21:55,562 INFO L231 Difference]: Finished difference. Result has 76 places, 71 transitions, 254 flow [2024-11-08 16:21:55,564 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=254, PETRI_PLACES=76, PETRI_TRANSITIONS=71} [2024-11-08 16:21:55,565 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 9 predicate places. [2024-11-08 16:21:55,567 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 71 transitions, 254 flow [2024-11-08 16:21:55,567 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 21.785714285714285) internal successors, (305), 14 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:21:55,568 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:21:55,568 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:21:55,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70544ddf-2e22-40fe-9627-553c63dfed6b/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-08 16:21:55,772 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70544ddf-2e22-40fe-9627-553c63dfed6b/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:21:55,772 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-11-08 16:21:55,773 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:21:55,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1547505596, now seen corresponding path program 1 times [2024-11-08 16:21:55,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:21:55,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070869692] [2024-11-08 16:21:55,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:21:55,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:21:55,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:21:55,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:21:55,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:21:55,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070869692] [2024-11-08 16:21:55,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070869692] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:21:55,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:21:55,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 16:21:55,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898524292] [2024-11-08 16:21:55,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:21:55,886 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 16:21:55,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:21:55,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 16:21:55,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 16:21:55,916 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 71 [2024-11-08 16:21:55,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 71 transitions, 254 flow. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:21:55,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:21:55,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 71 [2024-11-08 16:21:55,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:21:56,774 INFO L124 PetriNetUnfolderBase]: 2896/4783 cut-off events. [2024-11-08 16:21:56,774 INFO L125 PetriNetUnfolderBase]: For 93/93 co-relation queries the response was YES. [2024-11-08 16:21:56,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8942 conditions, 4783 events. 2896/4783 cut-off events. For 93/93 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 33289 event pairs, 2530 based on Foata normal form. 80/3164 useless extension candidates. Maximal degree in co-relation 8887. Up to 3821 conditions per place. [2024-11-08 16:21:56,822 INFO L140 encePairwiseOnDemand]: 57/71 looper letters, 72 selfloop transitions, 6 changer transitions 0/98 dead transitions. [2024-11-08 16:21:56,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 98 transitions, 504 flow [2024-11-08 16:21:56,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 16:21:56,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 16:21:56,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 197 transitions. [2024-11-08 16:21:56,825 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5549295774647888 [2024-11-08 16:21:56,825 INFO L175 Difference]: Start difference. First operand has 76 places, 71 transitions, 254 flow. Second operand 5 states and 197 transitions. [2024-11-08 16:21:56,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 98 transitions, 504 flow [2024-11-08 16:21:56,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 98 transitions, 446 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-11-08 16:21:56,831 INFO L231 Difference]: Finished difference. Result has 77 places, 75 transitions, 275 flow [2024-11-08 16:21:56,831 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=275, PETRI_PLACES=77, PETRI_TRANSITIONS=75} [2024-11-08 16:21:56,833 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 10 predicate places. [2024-11-08 16:21:56,834 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 75 transitions, 275 flow [2024-11-08 16:21:56,835 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:21:56,835 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:21:56,835 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:21:56,835 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-08 16:21:56,836 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-11-08 16:21:56,836 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:21:56,837 INFO L85 PathProgramCache]: Analyzing trace with hash 983450897, now seen corresponding path program 1 times [2024-11-08 16:21:56,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:21:56,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323627280] [2024-11-08 16:21:56,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:21:56,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:21:56,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:21:56,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:21:56,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:21:56,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323627280] [2024-11-08 16:21:56,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323627280] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:21:56,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:21:56,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-08 16:21:56,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177810350] [2024-11-08 16:21:56,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:21:56,924 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 16:21:56,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:21:56,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 16:21:56,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 16:21:56,926 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 71 [2024-11-08 16:21:56,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 75 transitions, 275 flow. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:21:56,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:21:56,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 71 [2024-11-08 16:21:56,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:21:57,655 INFO L124 PetriNetUnfolderBase]: 3030/4969 cut-off events. [2024-11-08 16:21:57,655 INFO L125 PetriNetUnfolderBase]: For 520/520 co-relation queries the response was YES. [2024-11-08 16:21:57,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10919 conditions, 4969 events. 3030/4969 cut-off events. For 520/520 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 33521 event pairs, 1183 based on Foata normal form. 141/3196 useless extension candidates. Maximal degree in co-relation 10870. Up to 3087 conditions per place. [2024-11-08 16:21:57,699 INFO L140 encePairwiseOnDemand]: 66/71 looper letters, 65 selfloop transitions, 2 changer transitions 5/95 dead transitions. [2024-11-08 16:21:57,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 95 transitions, 477 flow [2024-11-08 16:21:57,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 16:21:57,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 16:21:57,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 146 transitions. [2024-11-08 16:21:57,701 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6854460093896714 [2024-11-08 16:21:57,701 INFO L175 Difference]: Start difference. First operand has 77 places, 75 transitions, 275 flow. Second operand 3 states and 146 transitions. [2024-11-08 16:21:57,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 95 transitions, 477 flow [2024-11-08 16:21:57,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 95 transitions, 475 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-08 16:21:57,705 INFO L231 Difference]: Finished difference. Result has 79 places, 71 transitions, 256 flow [2024-11-08 16:21:57,706 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=256, PETRI_PLACES=79, PETRI_TRANSITIONS=71} [2024-11-08 16:21:57,706 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 12 predicate places. [2024-11-08 16:21:57,707 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 71 transitions, 256 flow [2024-11-08 16:21:57,707 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:21:57,707 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:21:57,707 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:21:57,708 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-08 16:21:57,708 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-11-08 16:21:57,712 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:21:57,712 INFO L85 PathProgramCache]: Analyzing trace with hash -362729983, now seen corresponding path program 1 times [2024-11-08 16:21:57,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:21:57,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995407840] [2024-11-08 16:21:57,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:21:57,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:21:57,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:21:58,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:21:58,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:21:58,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995407840] [2024-11-08 16:21:58,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995407840] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:21:58,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013181225] [2024-11-08 16:21:58,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:21:58,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:21:58,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70544ddf-2e22-40fe-9627-553c63dfed6b/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:21:58,048 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70544ddf-2e22-40fe-9627-553c63dfed6b/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:21:58,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70544ddf-2e22-40fe-9627-553c63dfed6b/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-08 16:21:58,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:21:58,155 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-08 16:21:58,158 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:21:58,174 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2024-11-08 16:21:58,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 16:21:58,298 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-08 16:21:58,323 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-08 16:21:58,324 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-08 16:21:58,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:21:58,386 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 16:21:58,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013181225] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:21:58,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-08 16:21:58,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 8 [2024-11-08 16:21:58,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682945923] [2024-11-08 16:21:58,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:21:58,387 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 16:21:58,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:21:58,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 16:21:58,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-11-08 16:21:58,465 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 71 [2024-11-08 16:21:58,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 71 transitions, 256 flow. Second operand has 6 states, 6 states have (on average 23.666666666666668) internal successors, (142), 6 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:21:58,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:21:58,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 71 [2024-11-08 16:21:58,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:21:58,962 INFO L124 PetriNetUnfolderBase]: 2044/3378 cut-off events. [2024-11-08 16:21:58,962 INFO L125 PetriNetUnfolderBase]: For 564/602 co-relation queries the response was YES. [2024-11-08 16:21:58,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7655 conditions, 3378 events. 2044/3378 cut-off events. For 564/602 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 21094 event pairs, 1726 based on Foata normal form. 0/2419 useless extension candidates. Maximal degree in co-relation 7620. Up to 2878 conditions per place. [2024-11-08 16:21:59,048 INFO L140 encePairwiseOnDemand]: 66/71 looper letters, 45 selfloop transitions, 3 changer transitions 0/68 dead transitions. [2024-11-08 16:21:59,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 68 transitions, 340 flow [2024-11-08 16:21:59,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 16:21:59,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 16:21:59,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 130 transitions. [2024-11-08 16:21:59,050 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45774647887323944 [2024-11-08 16:21:59,050 INFO L175 Difference]: Start difference. First operand has 79 places, 71 transitions, 256 flow. Second operand 4 states and 130 transitions. [2024-11-08 16:21:59,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 68 transitions, 340 flow [2024-11-08 16:21:59,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 68 transitions, 330 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-11-08 16:21:59,057 INFO L231 Difference]: Finished difference. Result has 74 places, 68 transitions, 240 flow [2024-11-08 16:21:59,057 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=240, PETRI_PLACES=74, PETRI_TRANSITIONS=68} [2024-11-08 16:21:59,059 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 7 predicate places. [2024-11-08 16:21:59,060 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 68 transitions, 240 flow [2024-11-08 16:21:59,060 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.666666666666668) internal successors, (142), 6 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:21:59,060 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:21:59,060 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:21:59,082 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70544ddf-2e22-40fe-9627-553c63dfed6b/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-08 16:21:59,260 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70544ddf-2e22-40fe-9627-553c63dfed6b/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:21:59,261 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-11-08 16:21:59,261 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:21:59,261 INFO L85 PathProgramCache]: Analyzing trace with hash -362729984, now seen corresponding path program 1 times [2024-11-08 16:21:59,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:21:59,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449821133] [2024-11-08 16:21:59,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:21:59,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:21:59,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:21:59,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 16:21:59,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:21:59,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449821133] [2024-11-08 16:21:59,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449821133] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:21:59,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:21:59,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 16:21:59,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331424164] [2024-11-08 16:21:59,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:21:59,364 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 16:21:59,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:21:59,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 16:21:59,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 16:21:59,378 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 71 [2024-11-08 16:21:59,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 68 transitions, 240 flow. Second operand has 4 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) [2024-11-08 16:21:59,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:21:59,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 71 [2024-11-08 16:21:59,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:21:59,660 INFO L124 PetriNetUnfolderBase]: 1244/2084 cut-off events. [2024-11-08 16:21:59,660 INFO L125 PetriNetUnfolderBase]: For 450/476 co-relation queries the response was YES. [2024-11-08 16:21:59,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4538 conditions, 2084 events. 1244/2084 cut-off events. For 450/476 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 11352 event pairs, 1008 based on Foata normal form. 0/1700 useless extension candidates. Maximal degree in co-relation 4506. Up to 1748 conditions per place. [2024-11-08 16:21:59,675 INFO L140 encePairwiseOnDemand]: 65/71 looper letters, 35 selfloop transitions, 7 changer transitions 0/65 dead transitions. [2024-11-08 16:21:59,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 65 transitions, 312 flow [2024-11-08 16:21:59,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 16:21:59,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 16:21:59,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 166 transitions. [2024-11-08 16:21:59,677 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4676056338028169 [2024-11-08 16:21:59,677 INFO L175 Difference]: Start difference. First operand has 74 places, 68 transitions, 240 flow. Second operand 5 states and 166 transitions. [2024-11-08 16:21:59,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 65 transitions, 312 flow [2024-11-08 16:21:59,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 65 transitions, 308 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 16:21:59,679 INFO L231 Difference]: Finished difference. Result has 73 places, 65 transitions, 238 flow [2024-11-08 16:21:59,679 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=238, PETRI_PLACES=73, PETRI_TRANSITIONS=65} [2024-11-08 16:21:59,680 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 6 predicate places. [2024-11-08 16:21:59,680 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 65 transitions, 238 flow [2024-11-08 16:21:59,681 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 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) [2024-11-08 16:21:59,681 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:21:59,681 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:21:59,681 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-08 16:21:59,681 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-11-08 16:21:59,682 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:21:59,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1087055757, now seen corresponding path program 1 times [2024-11-08 16:21:59,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:21:59,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902479705] [2024-11-08 16:21:59,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:21:59,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:21:59,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:21:59,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 16:21:59,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:21:59,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902479705] [2024-11-08 16:21:59,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902479705] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:21:59,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:21:59,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 16:21:59,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835039567] [2024-11-08 16:21:59,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:21:59,736 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 16:21:59,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:21:59,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 16:21:59,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 16:21:59,737 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 71 [2024-11-08 16:21:59,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 65 transitions, 238 flow. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:21:59,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:21:59,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 71 [2024-11-08 16:21:59,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:21:59,998 INFO L124 PetriNetUnfolderBase]: 1085/1855 cut-off events. [2024-11-08 16:21:59,998 INFO L125 PetriNetUnfolderBase]: For 415/415 co-relation queries the response was YES. [2024-11-08 16:22:00,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4026 conditions, 1855 events. 1085/1855 cut-off events. For 415/415 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 9106 event pairs, 387 based on Foata normal form. 10/1525 useless extension candidates. Maximal degree in co-relation 3993. Up to 1448 conditions per place. [2024-11-08 16:22:00,012 INFO L140 encePairwiseOnDemand]: 67/71 looper letters, 48 selfloop transitions, 3 changer transitions 0/74 dead transitions. [2024-11-08 16:22:00,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 74 transitions, 364 flow [2024-11-08 16:22:00,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 16:22:00,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 16:22:00,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 127 transitions. [2024-11-08 16:22:00,014 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.596244131455399 [2024-11-08 16:22:00,014 INFO L175 Difference]: Start difference. First operand has 73 places, 65 transitions, 238 flow. Second operand 3 states and 127 transitions. [2024-11-08 16:22:00,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 74 transitions, 364 flow [2024-11-08 16:22:00,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 74 transitions, 354 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-08 16:22:00,016 INFO L231 Difference]: Finished difference. Result has 73 places, 67 transitions, 251 flow [2024-11-08 16:22:00,017 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=251, PETRI_PLACES=73, PETRI_TRANSITIONS=67} [2024-11-08 16:22:00,017 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 6 predicate places. [2024-11-08 16:22:00,017 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 67 transitions, 251 flow [2024-11-08 16:22:00,018 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:22:00,018 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:22:00,018 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:22:00,018 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-08 16:22:00,018 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-11-08 16:22:00,019 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:22:00,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1490883035, now seen corresponding path program 1 times [2024-11-08 16:22:00,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:22:00,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084368852] [2024-11-08 16:22:00,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:22:00,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:22:00,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:22:00,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 16:22:00,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:22:00,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084368852] [2024-11-08 16:22:00,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084368852] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:22:00,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:22:00,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 16:22:00,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934548300] [2024-11-08 16:22:00,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:22:00,120 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 16:22:00,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:22:00,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 16:22:00,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 16:22:00,137 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 71 [2024-11-08 16:22:00,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 67 transitions, 251 flow. Second operand has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:22:00,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:22:00,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 71 [2024-11-08 16:22:00,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:22:00,499 INFO L124 PetriNetUnfolderBase]: 1293/2304 cut-off events. [2024-11-08 16:22:00,499 INFO L125 PetriNetUnfolderBase]: For 1352/1352 co-relation queries the response was YES. [2024-11-08 16:22:00,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5371 conditions, 2304 events. 1293/2304 cut-off events. For 1352/1352 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 12222 event pairs, 902 based on Foata normal form. 52/1944 useless extension candidates. Maximal degree in co-relation 5336. Up to 1521 conditions per place. [2024-11-08 16:22:00,518 INFO L140 encePairwiseOnDemand]: 63/71 looper letters, 42 selfloop transitions, 3 changer transitions 21/86 dead transitions. [2024-11-08 16:22:00,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 86 transitions, 447 flow [2024-11-08 16:22:00,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 16:22:00,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 16:22:00,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 178 transitions. [2024-11-08 16:22:00,520 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5014084507042254 [2024-11-08 16:22:00,520 INFO L175 Difference]: Start difference. First operand has 73 places, 67 transitions, 251 flow. Second operand 5 states and 178 transitions. [2024-11-08 16:22:00,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 86 transitions, 447 flow [2024-11-08 16:22:00,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 86 transitions, 422 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-11-08 16:22:00,524 INFO L231 Difference]: Finished difference. Result has 77 places, 64 transitions, 239 flow [2024-11-08 16:22:00,524 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=239, PETRI_PLACES=77, PETRI_TRANSITIONS=64} [2024-11-08 16:22:00,525 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 10 predicate places. [2024-11-08 16:22:00,525 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 64 transitions, 239 flow [2024-11-08 16:22:00,525 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:22:00,525 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:22:00,526 INFO L204 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] [2024-11-08 16:22:00,526 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-08 16:22:00,526 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-11-08 16:22:00,526 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:22:00,526 INFO L85 PathProgramCache]: Analyzing trace with hash -524732852, now seen corresponding path program 1 times [2024-11-08 16:22:00,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:22:00,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326160682] [2024-11-08 16:22:00,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:22:00,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:22:00,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:22:00,633 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 16:22:00,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:22:00,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326160682] [2024-11-08 16:22:00,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326160682] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:22:00,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:22:00,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 16:22:00,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22136590] [2024-11-08 16:22:00,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:22:00,635 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 16:22:00,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:22:00,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 16:22:00,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 16:22:00,654 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 71 [2024-11-08 16:22:00,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 64 transitions, 239 flow. Second operand has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:22:00,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:22:00,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 71 [2024-11-08 16:22:00,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:22:00,900 INFO L124 PetriNetUnfolderBase]: 801/1464 cut-off events. [2024-11-08 16:22:00,901 INFO L125 PetriNetUnfolderBase]: For 461/461 co-relation queries the response was YES. [2024-11-08 16:22:00,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3188 conditions, 1464 events. 801/1464 cut-off events. For 461/461 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 7362 event pairs, 538 based on Foata normal form. 0/1254 useless extension candidates. Maximal degree in co-relation 3160. Up to 1100 conditions per place. [2024-11-08 16:22:00,914 INFO L140 encePairwiseOnDemand]: 67/71 looper letters, 37 selfloop transitions, 3 changer transitions 0/62 dead transitions. [2024-11-08 16:22:00,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 62 transitions, 311 flow [2024-11-08 16:22:00,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 16:22:00,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 16:22:00,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 137 transitions. [2024-11-08 16:22:00,916 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4823943661971831 [2024-11-08 16:22:00,916 INFO L175 Difference]: Start difference. First operand has 77 places, 64 transitions, 239 flow. Second operand 4 states and 137 transitions. [2024-11-08 16:22:00,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 62 transitions, 311 flow [2024-11-08 16:22:00,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 62 transitions, 296 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-11-08 16:22:00,919 INFO L231 Difference]: Finished difference. Result has 72 places, 62 transitions, 222 flow [2024-11-08 16:22:00,919 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=222, PETRI_PLACES=72, PETRI_TRANSITIONS=62} [2024-11-08 16:22:00,921 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 5 predicate places. [2024-11-08 16:22:00,921 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 62 transitions, 222 flow [2024-11-08 16:22:00,921 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:22:00,921 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:22:00,922 INFO L204 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] [2024-11-08 16:22:00,922 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-08 16:22:00,922 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-11-08 16:22:00,922 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:22:00,923 INFO L85 PathProgramCache]: Analyzing trace with hash -524732851, now seen corresponding path program 1 times [2024-11-08 16:22:00,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:22:00,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137096891] [2024-11-08 16:22:00,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:22:00,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:22:00,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:22:01,218 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 16:22:01,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:22:01,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137096891] [2024-11-08 16:22:01,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137096891] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:22:01,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139870236] [2024-11-08 16:22:01,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:22:01,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:22:01,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70544ddf-2e22-40fe-9627-553c63dfed6b/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:22:01,222 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70544ddf-2e22-40fe-9627-553c63dfed6b/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:22:01,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70544ddf-2e22-40fe-9627-553c63dfed6b/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-08 16:22:01,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:22:01,333 INFO L255 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-08 16:22:01,335 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:22:01,495 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 16:22:01,495 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 16:22:01,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139870236] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:22:01,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-08 16:22:01,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2024-11-08 16:22:01,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790993905] [2024-11-08 16:22:01,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:22:01,499 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 16:22:01,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:22:01,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 16:22:01,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-08 16:22:01,566 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 71 [2024-11-08 16:22:01,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 62 transitions, 222 flow. Second operand has 6 states, 6 states have (on average 26.833333333333332) internal successors, (161), 6 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:22:01,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:22:01,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 71 [2024-11-08 16:22:01,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:22:01,799 INFO L124 PetriNetUnfolderBase]: 557/1095 cut-off events. [2024-11-08 16:22:01,799 INFO L125 PetriNetUnfolderBase]: For 267/267 co-relation queries the response was YES. [2024-11-08 16:22:01,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2251 conditions, 1095 events. 557/1095 cut-off events. For 267/267 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 5518 event pairs, 360 based on Foata normal form. 70/1029 useless extension candidates. Maximal degree in co-relation 2198. Up to 758 conditions per place. [2024-11-08 16:22:01,807 INFO L140 encePairwiseOnDemand]: 66/71 looper letters, 35 selfloop transitions, 5 changer transitions 0/60 dead transitions. [2024-11-08 16:22:01,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 60 transitions, 296 flow [2024-11-08 16:22:01,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 16:22:01,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 16:22:01,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 153 transitions. [2024-11-08 16:22:01,809 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4309859154929577 [2024-11-08 16:22:01,809 INFO L175 Difference]: Start difference. First operand has 72 places, 62 transitions, 222 flow. Second operand 5 states and 153 transitions. [2024-11-08 16:22:01,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 60 transitions, 296 flow [2024-11-08 16:22:01,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 60 transitions, 292 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 16:22:01,811 INFO L231 Difference]: Finished difference. Result has 72 places, 60 transitions, 222 flow [2024-11-08 16:22:01,811 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=222, PETRI_PLACES=72, PETRI_TRANSITIONS=60} [2024-11-08 16:22:01,812 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 5 predicate places. [2024-11-08 16:22:01,812 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 60 transitions, 222 flow [2024-11-08 16:22:01,812 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.833333333333332) internal successors, (161), 6 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:22:01,812 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:22:01,812 INFO L204 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] [2024-11-08 16:22:01,833 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70544ddf-2e22-40fe-9627-553c63dfed6b/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-08 16:22:02,016 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70544ddf-2e22-40fe-9627-553c63dfed6b/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-08 16:22:02,017 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-11-08 16:22:02,021 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:22:02,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1412119219, now seen corresponding path program 1 times [2024-11-08 16:22:02,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:22:02,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671372764] [2024-11-08 16:22:02,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:22:02,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:22:02,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:22:02,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 16:22:02,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:22:02,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671372764] [2024-11-08 16:22:02,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671372764] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:22:02,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:22:02,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-08 16:22:02,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760520779] [2024-11-08 16:22:02,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:22:02,272 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-08 16:22:02,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:22:02,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-08 16:22:02,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-08 16:22:02,309 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 71 [2024-11-08 16:22:02,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 60 transitions, 222 flow. Second operand has 8 states, 8 states have (on average 26.875) internal successors, (215), 8 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:22:02,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:22:02,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 71 [2024-11-08 16:22:02,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:22:02,924 INFO L124 PetriNetUnfolderBase]: 1533/2515 cut-off events. [2024-11-08 16:22:02,924 INFO L125 PetriNetUnfolderBase]: For 609/609 co-relation queries the response was YES. [2024-11-08 16:22:02,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5577 conditions, 2515 events. 1533/2515 cut-off events. For 609/609 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 13591 event pairs, 397 based on Foata normal form. 1/2467 useless extension candidates. Maximal degree in co-relation 5526. Up to 953 conditions per place. [2024-11-08 16:22:02,946 INFO L140 encePairwiseOnDemand]: 60/71 looper letters, 94 selfloop transitions, 12 changer transitions 10/133 dead transitions. [2024-11-08 16:22:02,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 133 transitions, 651 flow [2024-11-08 16:22:02,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-08 16:22:02,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-08 16:22:02,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 315 transitions. [2024-11-08 16:22:02,949 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49295774647887325 [2024-11-08 16:22:02,949 INFO L175 Difference]: Start difference. First operand has 72 places, 60 transitions, 222 flow. Second operand 9 states and 315 transitions. [2024-11-08 16:22:02,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 133 transitions, 651 flow [2024-11-08 16:22:02,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 133 transitions, 643 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-08 16:22:02,954 INFO L231 Difference]: Finished difference. Result has 81 places, 68 transitions, 282 flow [2024-11-08 16:22:02,954 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=282, PETRI_PLACES=81, PETRI_TRANSITIONS=68} [2024-11-08 16:22:02,955 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 14 predicate places. [2024-11-08 16:22:02,955 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 68 transitions, 282 flow [2024-11-08 16:22:02,955 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 26.875) internal successors, (215), 8 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:22:02,955 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:22:02,956 INFO L204 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] [2024-11-08 16:22:02,956 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-08 16:22:02,956 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-11-08 16:22:02,956 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:22:02,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1007053952, now seen corresponding path program 1 times [2024-11-08 16:22:02,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:22:02,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093783934] [2024-11-08 16:22:02,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:22:02,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:22:02,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:22:03,222 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 16:22:03,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:22:03,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093783934] [2024-11-08 16:22:03,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093783934] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:22:03,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844647024] [2024-11-08 16:22:03,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:22:03,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:22:03,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70544ddf-2e22-40fe-9627-553c63dfed6b/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:22:03,226 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70544ddf-2e22-40fe-9627-553c63dfed6b/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:22:03,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70544ddf-2e22-40fe-9627-553c63dfed6b/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-08 16:22:03,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:22:03,354 INFO L255 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-08 16:22:03,356 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:22:03,498 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 16:22:03,498 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:22:03,676 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 16:22:03,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844647024] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:22:03,677 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:22:03,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 13 [2024-11-08 16:22:03,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866745735] [2024-11-08 16:22:03,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:22:03,678 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-08 16:22:03,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:22:03,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-08 16:22:03,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2024-11-08 16:22:03,786 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 71 [2024-11-08 16:22:03,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 68 transitions, 282 flow. Second operand has 14 states, 14 states have (on average 27.0) internal successors, (378), 14 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:22:03,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:22:03,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 71 [2024-11-08 16:22:03,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:22:04,585 INFO L124 PetriNetUnfolderBase]: 1400/2897 cut-off events. [2024-11-08 16:22:04,585 INFO L125 PetriNetUnfolderBase]: For 1248/1260 co-relation queries the response was YES. [2024-11-08 16:22:04,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6646 conditions, 2897 events. 1400/2897 cut-off events. For 1248/1260 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 19356 event pairs, 744 based on Foata normal form. 112/2857 useless extension candidates. Maximal degree in co-relation 6627. Up to 1284 conditions per place. [2024-11-08 16:22:04,611 INFO L140 encePairwiseOnDemand]: 61/71 looper letters, 77 selfloop transitions, 20 changer transitions 4/121 dead transitions. [2024-11-08 16:22:04,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 121 transitions, 666 flow [2024-11-08 16:22:04,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-08 16:22:04,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-08 16:22:04,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 308 transitions. [2024-11-08 16:22:04,613 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43380281690140843 [2024-11-08 16:22:04,613 INFO L175 Difference]: Start difference. First operand has 81 places, 68 transitions, 282 flow. Second operand 10 states and 308 transitions. [2024-11-08 16:22:04,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 121 transitions, 666 flow [2024-11-08 16:22:04,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 121 transitions, 657 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-11-08 16:22:04,618 INFO L231 Difference]: Finished difference. Result has 92 places, 77 transitions, 395 flow [2024-11-08 16:22:04,618 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=395, PETRI_PLACES=92, PETRI_TRANSITIONS=77} [2024-11-08 16:22:04,619 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 25 predicate places. [2024-11-08 16:22:04,619 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 77 transitions, 395 flow [2024-11-08 16:22:04,619 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 27.0) internal successors, (378), 14 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:22:04,619 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:22:04,620 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 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] [2024-11-08 16:22:04,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70544ddf-2e22-40fe-9627-553c63dfed6b/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-08 16:22:04,824 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70544ddf-2e22-40fe-9627-553c63dfed6b/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-08 16:22:04,825 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-11-08 16:22:04,825 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:22:04,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1931267707, now seen corresponding path program 1 times [2024-11-08 16:22:04,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:22:04,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606458178] [2024-11-08 16:22:04,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:22:04,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:22:04,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:22:04,998 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-08 16:22:04,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:22:04,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606458178] [2024-11-08 16:22:04,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606458178] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:22:04,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:22:04,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 16:22:04,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686734801] [2024-11-08 16:22:04,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:22:05,000 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 16:22:05,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:22:05,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 16:22:05,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-08 16:22:05,001 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 71 [2024-11-08 16:22:05,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 77 transitions, 395 flow. Second operand 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) [2024-11-08 16:22:05,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:22:05,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 71 [2024-11-08 16:22:05,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:22:05,673 INFO L124 PetriNetUnfolderBase]: 2264/4735 cut-off events. [2024-11-08 16:22:05,673 INFO L125 PetriNetUnfolderBase]: For 3992/4134 co-relation queries the response was YES. [2024-11-08 16:22:05,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11468 conditions, 4735 events. 2264/4735 cut-off events. For 3992/4134 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 34592 event pairs, 618 based on Foata normal form. 124/4622 useless extension candidates. Maximal degree in co-relation 8657. Up to 1188 conditions per place. [2024-11-08 16:22:05,719 INFO L140 encePairwiseOnDemand]: 68/71 looper letters, 75 selfloop transitions, 6 changer transitions 0/113 dead transitions. [2024-11-08 16:22:05,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 113 transitions, 692 flow [2024-11-08 16:22:05,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 16:22:05,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 16:22:05,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 175 transitions. [2024-11-08 16:22:05,721 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6161971830985915 [2024-11-08 16:22:05,721 INFO L175 Difference]: Start difference. First operand has 92 places, 77 transitions, 395 flow. Second operand 4 states and 175 transitions. [2024-11-08 16:22:05,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 113 transitions, 692 flow [2024-11-08 16:22:05,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 113 transitions, 673 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-11-08 16:22:05,731 INFO L231 Difference]: Finished difference. Result has 95 places, 81 transitions, 437 flow [2024-11-08 16:22:05,732 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=437, PETRI_PLACES=95, PETRI_TRANSITIONS=81} [2024-11-08 16:22:05,732 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 28 predicate places. [2024-11-08 16:22:05,732 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 81 transitions, 437 flow [2024-11-08 16:22:05,732 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has 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) [2024-11-08 16:22:05,733 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:22:05,733 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 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] [2024-11-08 16:22:05,733 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-08 16:22:05,733 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-11-08 16:22:05,733 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:22:05,734 INFO L85 PathProgramCache]: Analyzing trace with hash -739104563, now seen corresponding path program 2 times [2024-11-08 16:22:05,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:22:05,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911129600] [2024-11-08 16:22:05,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:22:05,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:22:05,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:22:06,403 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 16:22:06,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:22:06,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911129600] [2024-11-08 16:22:06,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911129600] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:22:06,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522827671] [2024-11-08 16:22:06,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 16:22:06,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:22:06,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70544ddf-2e22-40fe-9627-553c63dfed6b/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:22:06,406 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70544ddf-2e22-40fe-9627-553c63dfed6b/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:22:06,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70544ddf-2e22-40fe-9627-553c63dfed6b/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-08 16:22:06,531 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 16:22:06,531 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:22:06,533 INFO L255 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-08 16:22:06,536 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:22:06,878 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 11 treesize of output 3 [2024-11-08 16:22:06,992 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 16:22:06,992 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:22:07,243 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-08 16:22:07,244 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 11 [2024-11-08 16:22:07,587 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 16:22:07,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522827671] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:22:07,587 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:22:07,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 23 [2024-11-08 16:22:07,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84305946] [2024-11-08 16:22:07,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:22:07,588 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-08 16:22:07,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:22:07,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-08 16:22:07,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2024-11-08 16:22:07,850 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 71 [2024-11-08 16:22:07,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 81 transitions, 437 flow. Second operand has 24 states, 24 states have (on average 24.958333333333332) internal successors, (599), 24 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:22:07,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:22:07,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 71 [2024-11-08 16:22:07,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:22:13,024 INFO L124 PetriNetUnfolderBase]: 12856/24309 cut-off events. [2024-11-08 16:22:13,024 INFO L125 PetriNetUnfolderBase]: For 32364/33610 co-relation queries the response was YES. [2024-11-08 16:22:13,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66383 conditions, 24309 events. 12856/24309 cut-off events. For 32364/33610 co-relation queries the response was YES. Maximal size of possible extension queue 953. Compared 211978 event pairs, 1159 based on Foata normal form. 865/24964 useless extension candidates. Maximal degree in co-relation 49567. Up to 3772 conditions per place. [2024-11-08 16:22:13,240 INFO L140 encePairwiseOnDemand]: 60/71 looper letters, 394 selfloop transitions, 75 changer transitions 3/491 dead transitions. [2024-11-08 16:22:13,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 491 transitions, 3168 flow [2024-11-08 16:22:13,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-08 16:22:13,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2024-11-08 16:22:13,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 1161 transitions. [2024-11-08 16:22:13,245 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45422535211267606 [2024-11-08 16:22:13,245 INFO L175 Difference]: Start difference. First operand has 95 places, 81 transitions, 437 flow. Second operand 36 states and 1161 transitions. [2024-11-08 16:22:13,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 491 transitions, 3168 flow [2024-11-08 16:22:13,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 491 transitions, 3100 flow, removed 34 selfloop flow, removed 0 redundant places. [2024-11-08 16:22:13,277 INFO L231 Difference]: Finished difference. Result has 133 places, 159 transitions, 1144 flow [2024-11-08 16:22:13,277 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=1144, PETRI_PLACES=133, PETRI_TRANSITIONS=159} [2024-11-08 16:22:13,277 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 66 predicate places. [2024-11-08 16:22:13,278 INFO L471 AbstractCegarLoop]: Abstraction has has 133 places, 159 transitions, 1144 flow [2024-11-08 16:22:13,278 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 24.958333333333332) internal successors, (599), 24 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:22:13,279 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:22:13,279 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 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] [2024-11-08 16:22:13,300 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70544ddf-2e22-40fe-9627-553c63dfed6b/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-08 16:22:13,479 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70544ddf-2e22-40fe-9627-553c63dfed6b/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-08 16:22:13,480 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-11-08 16:22:13,480 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:22:13,481 INFO L85 PathProgramCache]: Analyzing trace with hash 481766435, now seen corresponding path program 3 times [2024-11-08 16:22:13,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:22:13,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283037719] [2024-11-08 16:22:13,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:22:13,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:22:13,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:22:14,061 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 16:22:14,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:22:14,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283037719] [2024-11-08 16:22:14,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283037719] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:22:14,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894261892] [2024-11-08 16:22:14,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 16:22:14,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:22:14,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70544ddf-2e22-40fe-9627-553c63dfed6b/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:22:14,064 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70544ddf-2e22-40fe-9627-553c63dfed6b/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:22:14,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70544ddf-2e22-40fe-9627-553c63dfed6b/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-08 16:22:14,193 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-08 16:22:14,193 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:22:14,195 INFO L255 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-08 16:22:14,198 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:22:14,304 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-08 16:22:14,304 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:22:14,368 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-08 16:22:14,369 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2024-11-08 16:22:14,486 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-08 16:22:14,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894261892] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:22:14,487 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:22:14,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4, 4] total 13 [2024-11-08 16:22:14,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097638255] [2024-11-08 16:22:14,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:22:14,488 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-08 16:22:14,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:22:14,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-08 16:22:14,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2024-11-08 16:22:14,645 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 71 [2024-11-08 16:22:14,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 159 transitions, 1144 flow. Second operand has 14 states, 14 states have (on average 25.214285714285715) internal successors, (353), 14 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:22:14,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:22:14,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 71 [2024-11-08 16:22:14,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:22:19,699 INFO L124 PetriNetUnfolderBase]: 16033/29722 cut-off events. [2024-11-08 16:22:19,699 INFO L125 PetriNetUnfolderBase]: For 48803/50498 co-relation queries the response was YES. [2024-11-08 16:22:19,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83384 conditions, 29722 events. 16033/29722 cut-off events. For 48803/50498 co-relation queries the response was YES. Maximal size of possible extension queue 1087. Compared 261752 event pairs, 4681 based on Foata normal form. 386/29884 useless extension candidates. Maximal degree in co-relation 64823. Up to 15074 conditions per place. [2024-11-08 16:22:20,037 INFO L140 encePairwiseOnDemand]: 59/71 looper letters, 197 selfloop transitions, 58 changer transitions 0/273 dead transitions. [2024-11-08 16:22:20,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 273 transitions, 2209 flow [2024-11-08 16:22:20,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-08 16:22:20,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-08 16:22:20,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 457 transitions. [2024-11-08 16:22:20,041 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4022887323943662 [2024-11-08 16:22:20,041 INFO L175 Difference]: Start difference. First operand has 133 places, 159 transitions, 1144 flow. Second operand 16 states and 457 transitions. [2024-11-08 16:22:20,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 273 transitions, 2209 flow [2024-11-08 16:22:20,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 273 transitions, 1798 flow, removed 202 selfloop flow, removed 3 redundant places. [2024-11-08 16:22:20,122 INFO L231 Difference]: Finished difference. Result has 145 places, 164 transitions, 1080 flow [2024-11-08 16:22:20,122 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=869, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1080, PETRI_PLACES=145, PETRI_TRANSITIONS=164} [2024-11-08 16:22:20,123 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 78 predicate places. [2024-11-08 16:22:20,123 INFO L471 AbstractCegarLoop]: Abstraction has has 145 places, 164 transitions, 1080 flow [2024-11-08 16:22:20,124 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 25.214285714285715) internal successors, (353), 14 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:22:20,124 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:22:20,124 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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] [2024-11-08 16:22:20,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70544ddf-2e22-40fe-9627-553c63dfed6b/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-08 16:22:20,328 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70544ddf-2e22-40fe-9627-553c63dfed6b/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-08 16:22:20,329 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-11-08 16:22:20,330 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:22:20,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1593966453, now seen corresponding path program 1 times [2024-11-08 16:22:20,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:22:20,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409771162] [2024-11-08 16:22:20,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:22:20,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:22:20,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:22:20,497 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-08 16:22:20,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:22:20,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409771162] [2024-11-08 16:22:20,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409771162] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:22:20,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:22:20,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 16:22:20,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976226723] [2024-11-08 16:22:20,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:22:20,499 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 16:22:20,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:22:20,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 16:22:20,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-08 16:22:20,500 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 71 [2024-11-08 16:22:20,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 164 transitions, 1080 flow. Second operand has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:22:20,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:22:20,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 71 [2024-11-08 16:22:20,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:22:24,902 INFO L124 PetriNetUnfolderBase]: 12649/25141 cut-off events. [2024-11-08 16:22:24,902 INFO L125 PetriNetUnfolderBase]: For 31833/33300 co-relation queries the response was YES. [2024-11-08 16:22:25,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66294 conditions, 25141 events. 12649/25141 cut-off events. For 31833/33300 co-relation queries the response was YES. Maximal size of possible extension queue 1150. Compared 232218 event pairs, 3659 based on Foata normal form. 453/25129 useless extension candidates. Maximal degree in co-relation 65346. Up to 12635 conditions per place. [2024-11-08 16:22:25,153 INFO L140 encePairwiseOnDemand]: 67/71 looper letters, 141 selfloop transitions, 27 changer transitions 15/219 dead transitions. [2024-11-08 16:22:25,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 219 transitions, 1655 flow [2024-11-08 16:22:25,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 16:22:25,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 16:22:25,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 181 transitions. [2024-11-08 16:22:25,155 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6373239436619719 [2024-11-08 16:22:25,155 INFO L175 Difference]: Start difference. First operand has 145 places, 164 transitions, 1080 flow. Second operand 4 states and 181 transitions. [2024-11-08 16:22:25,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 219 transitions, 1655 flow [2024-11-08 16:22:25,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 219 transitions, 1587 flow, removed 1 selfloop flow, removed 12 redundant places. [2024-11-08 16:22:25,201 INFO L231 Difference]: Finished difference. Result has 138 places, 161 transitions, 1058 flow [2024-11-08 16:22:25,202 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=985, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1058, PETRI_PLACES=138, PETRI_TRANSITIONS=161} [2024-11-08 16:22:25,203 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 71 predicate places. [2024-11-08 16:22:25,203 INFO L471 AbstractCegarLoop]: Abstraction has has 138 places, 161 transitions, 1058 flow [2024-11-08 16:22:25,203 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:22:25,203 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:22:25,204 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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] [2024-11-08 16:22:25,204 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-08 16:22:25,204 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-11-08 16:22:25,204 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:22:25,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1315833243, now seen corresponding path program 1 times [2024-11-08 16:22:25,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:22:25,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180974545] [2024-11-08 16:22:25,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:22:25,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:22:25,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:22:25,447 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-08 16:22:25,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:22:25,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180974545] [2024-11-08 16:22:25,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180974545] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:22:25,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936601498] [2024-11-08 16:22:25,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:22:25,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:22:25,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70544ddf-2e22-40fe-9627-553c63dfed6b/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:22:25,450 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70544ddf-2e22-40fe-9627-553c63dfed6b/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:22:25,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70544ddf-2e22-40fe-9627-553c63dfed6b/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-08 16:22:25,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:22:25,583 INFO L255 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-08 16:22:25,585 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:22:25,740 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-08 16:22:25,741 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:22:25,909 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-08 16:22:25,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936601498] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:22:25,909 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:22:25,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 15 [2024-11-08 16:22:25,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554051964] [2024-11-08 16:22:25,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:22:25,910 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-08 16:22:25,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:22:25,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-08 16:22:25,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2024-11-08 16:22:26,003 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 71 [2024-11-08 16:22:26,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 161 transitions, 1058 flow. Second operand has 15 states, 15 states have (on average 27.266666666666666) internal successors, (409), 15 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:22:26,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:22:26,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 71 [2024-11-08 16:22:26,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:22:30,970 INFO L124 PetriNetUnfolderBase]: 14760/31436 cut-off events. [2024-11-08 16:22:30,971 INFO L125 PetriNetUnfolderBase]: For 46194/47320 co-relation queries the response was YES. [2024-11-08 16:22:31,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84583 conditions, 31436 events. 14760/31436 cut-off events. For 46194/47320 co-relation queries the response was YES. Maximal size of possible extension queue 1161. Compared 314017 event pairs, 8959 based on Foata normal form. 657/31383 useless extension candidates. Maximal degree in co-relation 84558. Up to 16822 conditions per place. [2024-11-08 16:22:31,200 INFO L140 encePairwiseOnDemand]: 61/71 looper letters, 117 selfloop transitions, 20 changer transitions 161/322 dead transitions. [2024-11-08 16:22:31,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 322 transitions, 2604 flow [2024-11-08 16:22:31,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-08 16:22:31,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-08 16:22:31,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 298 transitions. [2024-11-08 16:22:31,205 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4197183098591549 [2024-11-08 16:22:31,205 INFO L175 Difference]: Start difference. First operand has 138 places, 161 transitions, 1058 flow. Second operand 10 states and 298 transitions. [2024-11-08 16:22:31,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 322 transitions, 2604 flow [2024-11-08 16:22:31,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 322 transitions, 2538 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-11-08 16:22:31,306 INFO L231 Difference]: Finished difference. Result has 137 places, 159 transitions, 1029 flow [2024-11-08 16:22:31,306 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=996, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1029, PETRI_PLACES=137, PETRI_TRANSITIONS=159} [2024-11-08 16:22:31,309 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 70 predicate places. [2024-11-08 16:22:31,309 INFO L471 AbstractCegarLoop]: Abstraction has has 137 places, 159 transitions, 1029 flow [2024-11-08 16:22:31,310 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 27.266666666666666) internal successors, (409), 15 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:22:31,310 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:22:31,310 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-08 16:22:31,330 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70544ddf-2e22-40fe-9627-553c63dfed6b/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-08 16:22:31,510 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70544ddf-2e22-40fe-9627-553c63dfed6b/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:22:31,511 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-11-08 16:22:31,511 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:22:31,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1692032867, now seen corresponding path program 2 times [2024-11-08 16:22:31,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:22:31,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95179222] [2024-11-08 16:22:31,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:22:31,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:22:31,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:22:32,185 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-08 16:22:32,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:22:32,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95179222] [2024-11-08 16:22:32,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95179222] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:22:32,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811233656] [2024-11-08 16:22:32,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 16:22:32,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:22:32,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70544ddf-2e22-40fe-9627-553c63dfed6b/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:22:32,189 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70544ddf-2e22-40fe-9627-553c63dfed6b/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:22:32,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70544ddf-2e22-40fe-9627-553c63dfed6b/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-08 16:22:32,583 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 16:22:32,583 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:22:32,590 INFO L255 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-08 16:22:32,593 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:22:33,018 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 26 treesize of output 8 [2024-11-08 16:22:33,054 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-08 16:22:33,054 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:22:33,284 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-08 16:22:33,284 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 11 [2024-11-08 16:22:33,753 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-08 16:22:33,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811233656] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:22:33,753 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:22:33,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 10] total 29 [2024-11-08 16:22:33,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926381515] [2024-11-08 16:22:33,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:22:33,754 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-08 16:22:33,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:22:33,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-08 16:22:33,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=642, Unknown=0, NotChecked=0, Total=812 [2024-11-08 16:22:34,063 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 71 [2024-11-08 16:22:34,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 159 transitions, 1029 flow. Second operand has 29 states, 29 states have (on average 21.896551724137932) internal successors, (635), 29 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:22:34,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:22:34,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 71 [2024-11-08 16:22:34,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand