./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_11-ptr_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86bc3d7-a198-4e4e-b473-97684492f70a/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86bc3d7-a198-4e4e-b473-97684492f70a/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86bc3d7-a198-4e4e-b473-97684492f70a/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86bc3d7-a198-4e4e-b473-97684492f70a/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_11-ptr_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86bc3d7-a198-4e4e-b473-97684492f70a/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86bc3d7-a198-4e4e-b473-97684492f70a/bin/uautomizer-verify-BQ2R08f2Ya --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 265daba2b5ad7b4578f16c23ab641f7a5441c3a3894a2482737cba7b750ee6df --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 01:13:39,039 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 01:13:39,106 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86bc3d7-a198-4e4e-b473-97684492f70a/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-29 01:13:39,110 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 01:13:39,111 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 01:13:39,134 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 01:13:39,134 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 01:13:39,135 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 01:13:39,136 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 01:13:39,136 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 01:13:39,137 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 01:13:39,137 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 01:13:39,138 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 01:13:39,138 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 01:13:39,139 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 01:13:39,140 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 01:13:39,140 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 01:13:39,141 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 01:13:39,141 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 01:13:39,141 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 01:13:39,142 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-29 01:13:39,142 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-29 01:13:39,143 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-29 01:13:39,143 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 01:13:39,144 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-29 01:13:39,144 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 01:13:39,144 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 01:13:39,145 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 01:13:39,145 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 01:13:39,145 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 01:13:39,146 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 01:13:39,146 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 01:13:39,146 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 01:13:39,147 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 01:13:39,147 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 01:13:39,147 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 01:13:39,147 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 01:13:39,147 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 01:13:39,148 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 01:13:39,148 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 01:13:39,148 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 01:13:39,148 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_f86bc3d7-a198-4e4e-b473-97684492f70a/bin/uautomizer-verify-BQ2R08f2Ya/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86bc3d7-a198-4e4e-b473-97684492f70a/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 265daba2b5ad7b4578f16c23ab641f7a5441c3a3894a2482737cba7b750ee6df [2023-11-29 01:13:39,366 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 01:13:39,387 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 01:13:39,390 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 01:13:39,392 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 01:13:39,392 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 01:13:39,393 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86bc3d7-a198-4e4e-b473-97684492f70a/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/goblint-regression/28-race_reach_11-ptr_racing.i [2023-11-29 01:13:42,228 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 01:13:42,455 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 01:13:42,456 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86bc3d7-a198-4e4e-b473-97684492f70a/sv-benchmarks/c/goblint-regression/28-race_reach_11-ptr_racing.i [2023-11-29 01:13:42,471 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86bc3d7-a198-4e4e-b473-97684492f70a/bin/uautomizer-verify-BQ2R08f2Ya/data/5ceda6b3e/eb664e023d9745afb668d0de097aa298/FLAGb07428947 [2023-11-29 01:13:42,486 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86bc3d7-a198-4e4e-b473-97684492f70a/bin/uautomizer-verify-BQ2R08f2Ya/data/5ceda6b3e/eb664e023d9745afb668d0de097aa298 [2023-11-29 01:13:42,489 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 01:13:42,491 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 01:13:42,492 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 01:13:42,492 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 01:13:42,498 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 01:13:42,499 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 01:13:42" (1/1) ... [2023-11-29 01:13:42,500 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@218a7c88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:13:42, skipping insertion in model container [2023-11-29 01:13:42,500 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 01:13:42" (1/1) ... [2023-11-29 01:13:42,545 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 01:13:42,878 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 01:13:42,894 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 01:13:42,939 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 01:13:42,983 INFO L206 MainTranslator]: Completed translation [2023-11-29 01:13:42,984 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:13:42 WrapperNode [2023-11-29 01:13:42,984 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 01:13:42,985 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 01:13:42,985 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 01:13:42,985 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 01:13:42,993 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:13:42" (1/1) ... [2023-11-29 01:13:43,008 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:13:42" (1/1) ... [2023-11-29 01:13:43,032 INFO L138 Inliner]: procedures = 171, calls = 49, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 93 [2023-11-29 01:13:43,033 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 01:13:43,033 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 01:13:43,034 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 01:13:43,034 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 01:13:43,046 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:13:42" (1/1) ... [2023-11-29 01:13:43,046 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:13:42" (1/1) ... [2023-11-29 01:13:43,049 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:13:42" (1/1) ... [2023-11-29 01:13:43,067 INFO L175 MemorySlicer]: Split 25 memory accesses to 6 slices as follows [2, 5, 6, 5, 5, 2]. 24 percent of accesses are in the largest equivalence class. The 18 initializations are split as follows [2, 5, 1, 5, 5, 0]. The 3 writes are split as follows [0, 0, 2, 0, 0, 1]. [2023-11-29 01:13:43,067 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:13:42" (1/1) ... [2023-11-29 01:13:43,068 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:13:42" (1/1) ... [2023-11-29 01:13:43,076 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:13:42" (1/1) ... [2023-11-29 01:13:43,080 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:13:42" (1/1) ... [2023-11-29 01:13:43,083 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:13:42" (1/1) ... [2023-11-29 01:13:43,085 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:13:42" (1/1) ... [2023-11-29 01:13:43,089 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 01:13:43,091 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 01:13:43,091 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 01:13:43,091 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 01:13:43,092 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:13:42" (1/1) ... [2023-11-29 01:13:43,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 01:13:43,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86bc3d7-a198-4e4e-b473-97684492f70a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:13:43,123 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86bc3d7-a198-4e4e-b473-97684492f70a/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 01:13:43,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86bc3d7-a198-4e4e-b473-97684492f70a/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 01:13:43,157 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 01:13:43,157 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 01:13:43,157 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 01:13:43,157 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-29 01:13:43,157 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-29 01:13:43,157 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2023-11-29 01:13:43,158 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 01:13:43,158 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 01:13:43,158 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 01:13:43,158 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-29 01:13:43,158 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-29 01:13:43,158 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2023-11-29 01:13:43,158 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-29 01:13:43,159 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 01:13:43,159 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 01:13:43,159 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-29 01:13:43,159 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-29 01:13:43,159 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 01:13:43,159 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 01:13:43,160 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 01:13:43,160 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 01:13:43,160 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 01:13:43,160 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-29 01:13:43,160 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-11-29 01:13:43,160 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-29 01:13:43,161 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 01:13:43,161 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 01:13:43,162 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-29 01:13:43,308 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 01:13:43,310 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 01:13:43,574 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 01:13:43,736 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 01:13:43,736 INFO L309 CfgBuilder]: Removed 10 assume(true) statements. [2023-11-29 01:13:43,736 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 01:13:43 BoogieIcfgContainer [2023-11-29 01:13:43,736 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 01:13:43,739 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 01:13:43,739 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 01:13:43,741 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 01:13:43,741 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 01:13:42" (1/3) ... [2023-11-29 01:13:43,742 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f6ff7af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 01:13:43, skipping insertion in model container [2023-11-29 01:13:43,742 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:13:42" (2/3) ... [2023-11-29 01:13:43,743 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f6ff7af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 01:13:43, skipping insertion in model container [2023-11-29 01:13:43,743 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 01:13:43" (3/3) ... [2023-11-29 01:13:43,744 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_11-ptr_racing.i [2023-11-29 01:13:43,758 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 01:13:43,758 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2023-11-29 01:13:43,758 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 01:13:43,797 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-29 01:13:43,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 67 places, 75 transitions, 157 flow [2023-11-29 01:13:43,866 INFO L124 PetriNetUnfolderBase]: 15/109 cut-off events. [2023-11-29 01:13:43,866 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-29 01:13:43,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114 conditions, 109 events. 15/109 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 469 event pairs, 0 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 70. Up to 4 conditions per place. [2023-11-29 01:13:43,870 INFO L82 GeneralOperation]: Start removeDead. Operand has 67 places, 75 transitions, 157 flow [2023-11-29 01:13:43,875 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 67 places, 75 transitions, 157 flow [2023-11-29 01:13:43,883 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 01:13:43,889 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@5725c0e6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 01:13:43,890 INFO L358 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2023-11-29 01:13:43,894 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 01:13:43,894 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-29 01:13:43,894 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 01:13:43,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:13:43,895 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 01:13:43,896 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-29 01:13:43,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:13:43,901 INFO L85 PathProgramCache]: Analyzing trace with hash 380687, now seen corresponding path program 1 times [2023-11-29 01:13:43,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:13:43,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897976193] [2023-11-29 01:13:43,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:13:43,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:13:44,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:13:44,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:13:44,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:13:44,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897976193] [2023-11-29 01:13:44,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897976193] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:13:44,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:13:44,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 01:13:44,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906494944] [2023-11-29 01:13:44,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:13:44,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:13:44,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:13:44,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:13:44,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:13:44,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 75 [2023-11-29 01:13:44,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 75 transitions, 157 flow. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:13:44,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:13:44,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 75 [2023-11-29 01:13:44,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:13:44,452 INFO L124 PetriNetUnfolderBase]: 181/665 cut-off events. [2023-11-29 01:13:44,452 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-29 01:13:44,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1076 conditions, 665 events. 181/665 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 3861 event pairs, 156 based on Foata normal form. 105/703 useless extension candidates. Maximal degree in co-relation 1020. Up to 353 conditions per place. [2023-11-29 01:13:44,461 INFO L140 encePairwiseOnDemand]: 61/75 looper letters, 41 selfloop transitions, 2 changer transitions 0/74 dead transitions. [2023-11-29 01:13:44,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 74 transitions, 241 flow [2023-11-29 01:13:44,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:13:44,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 01:13:44,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 154 transitions. [2023-11-29 01:13:44,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6844444444444444 [2023-11-29 01:13:44,475 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 154 transitions. [2023-11-29 01:13:44,475 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 154 transitions. [2023-11-29 01:13:44,477 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:13:44,479 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 154 transitions. [2023-11-29 01:13:44,481 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:13:44,485 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:13:44,486 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:13:44,488 INFO L175 Difference]: Start difference. First operand has 67 places, 75 transitions, 157 flow. Second operand 3 states and 154 transitions. [2023-11-29 01:13:44,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 74 transitions, 241 flow [2023-11-29 01:13:44,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 74 transitions, 241 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-29 01:13:44,496 INFO L231 Difference]: Finished difference. Result has 66 places, 62 transitions, 135 flow [2023-11-29 01:13:44,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=135, PETRI_PLACES=66, PETRI_TRANSITIONS=62} [2023-11-29 01:13:44,501 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -1 predicate places. [2023-11-29 01:13:44,501 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 62 transitions, 135 flow [2023-11-29 01:13:44,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:13:44,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:13:44,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 01:13:44,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 01:13:44,503 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-29 01:13:44,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:13:44,503 INFO L85 PathProgramCache]: Analyzing trace with hash 380688, now seen corresponding path program 1 times [2023-11-29 01:13:44,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:13:44,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924524324] [2023-11-29 01:13:44,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:13:44,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:13:44,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:13:44,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:13:44,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:13:44,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924524324] [2023-11-29 01:13:44,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924524324] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:13:44,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:13:44,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 01:13:44,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197059164] [2023-11-29 01:13:44,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:13:44,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:13:44,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:13:44,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:13:44,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:13:44,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 75 [2023-11-29 01:13:44,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 62 transitions, 135 flow. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:13:44,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:13:44,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 75 [2023-11-29 01:13:44,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:13:44,846 INFO L124 PetriNetUnfolderBase]: 168/600 cut-off events. [2023-11-29 01:13:44,846 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-29 01:13:44,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 991 conditions, 600 events. 168/600 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 3345 event pairs, 130 based on Foata normal form. 1/542 useless extension candidates. Maximal degree in co-relation 958. Up to 355 conditions per place. [2023-11-29 01:13:44,853 INFO L140 encePairwiseOnDemand]: 71/75 looper letters, 41 selfloop transitions, 2 changer transitions 0/75 dead transitions. [2023-11-29 01:13:44,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 75 transitions, 247 flow [2023-11-29 01:13:44,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:13:44,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 01:13:44,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 147 transitions. [2023-11-29 01:13:44,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6533333333333333 [2023-11-29 01:13:44,856 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 147 transitions. [2023-11-29 01:13:44,856 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 147 transitions. [2023-11-29 01:13:44,856 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:13:44,857 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 147 transitions. [2023-11-29 01:13:44,858 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:13:44,859 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:13:44,860 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:13:44,860 INFO L175 Difference]: Start difference. First operand has 66 places, 62 transitions, 135 flow. Second operand 3 states and 147 transitions. [2023-11-29 01:13:44,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 75 transitions, 247 flow [2023-11-29 01:13:44,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 75 transitions, 243 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 01:13:44,865 INFO L231 Difference]: Finished difference. Result has 67 places, 62 transitions, 141 flow [2023-11-29 01:13:44,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=141, PETRI_PLACES=67, PETRI_TRANSITIONS=62} [2023-11-29 01:13:44,866 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 0 predicate places. [2023-11-29 01:13:44,867 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 62 transitions, 141 flow [2023-11-29 01:13:44,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:13:44,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:13:44,867 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-11-29 01:13:44,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 01:13:44,868 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-29 01:13:44,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:13:44,868 INFO L85 PathProgramCache]: Analyzing trace with hash -602794638, now seen corresponding path program 1 times [2023-11-29 01:13:44,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:13:44,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052112367] [2023-11-29 01:13:44,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:13:44,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:13:44,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:13:45,030 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:13:45,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:13:45,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052112367] [2023-11-29 01:13:45,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052112367] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:13:45,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067972273] [2023-11-29 01:13:45,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:13:45,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:13:45,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86bc3d7-a198-4e4e-b473-97684492f70a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:13:45,033 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86bc3d7-a198-4e4e-b473-97684492f70a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:13:45,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86bc3d7-a198-4e4e-b473-97684492f70a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 01:13:45,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:13:45,136 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 01:13:45,140 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:13:45,195 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 8 treesize of output 1 [2023-11-29 01:13:45,265 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:13:45,265 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:13:45,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:13:45,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067972273] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:13:45,335 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:13:45,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2023-11-29 01:13:45,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928881103] [2023-11-29 01:13:45,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:13:45,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 01:13:45,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:13:45,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 01:13:45,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-29 01:13:45,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 75 [2023-11-29 01:13:45,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 62 transitions, 141 flow. Second operand has 9 states, 9 states have (on average 35.333333333333336) internal successors, (318), 9 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:13:45,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:13:45,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 75 [2023-11-29 01:13:45,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:13:45,594 INFO L124 PetriNetUnfolderBase]: 36/148 cut-off events. [2023-11-29 01:13:45,595 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-29 01:13:45,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 273 conditions, 148 events. 36/148 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 457 event pairs, 20 based on Foata normal form. 26/160 useless extension candidates. Maximal degree in co-relation 252. Up to 75 conditions per place. [2023-11-29 01:13:45,596 INFO L140 encePairwiseOnDemand]: 71/75 looper letters, 29 selfloop transitions, 2 changer transitions 0/49 dead transitions. [2023-11-29 01:13:45,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 49 transitions, 170 flow [2023-11-29 01:13:45,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 01:13:45,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 01:13:45,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 165 transitions. [2023-11-29 01:13:45,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2023-11-29 01:13:45,600 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 165 transitions. [2023-11-29 01:13:45,600 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 165 transitions. [2023-11-29 01:13:45,600 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:13:45,600 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 165 transitions. [2023-11-29 01:13:45,601 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 41.25) internal successors, (165), 4 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:13:45,603 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 75.0) internal successors, (375), 5 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:13:45,603 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 75.0) internal successors, (375), 5 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:13:45,603 INFO L175 Difference]: Start difference. First operand has 67 places, 62 transitions, 141 flow. Second operand 4 states and 165 transitions. [2023-11-29 01:13:45,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 49 transitions, 170 flow [2023-11-29 01:13:45,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 49 transitions, 164 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 01:13:45,605 INFO L231 Difference]: Finished difference. Result has 41 places, 35 transitions, 78 flow [2023-11-29 01:13:45,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=78, PETRI_PLACES=41, PETRI_TRANSITIONS=35} [2023-11-29 01:13:45,606 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -26 predicate places. [2023-11-29 01:13:45,606 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 35 transitions, 78 flow [2023-11-29 01:13:45,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 35.333333333333336) internal successors, (318), 9 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:13:45,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:13:45,607 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2023-11-29 01:13:45,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86bc3d7-a198-4e4e-b473-97684492f70a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 01:13:45,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86bc3d7-a198-4e4e-b473-97684492f70a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-29 01:13:45,811 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-29 01:13:45,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:13:45,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1506764231, now seen corresponding path program 1 times [2023-11-29 01:13:45,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:13:45,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563170738] [2023-11-29 01:13:45,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:13:45,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:13:45,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 01:13:45,839 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-29 01:13:45,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 01:13:45,871 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-29 01:13:45,871 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-29 01:13:45,872 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (24 of 25 remaining) [2023-11-29 01:13:45,874 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 25 remaining) [2023-11-29 01:13:45,875 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 25 remaining) [2023-11-29 01:13:45,875 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 25 remaining) [2023-11-29 01:13:45,875 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 25 remaining) [2023-11-29 01:13:45,875 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 25 remaining) [2023-11-29 01:13:45,875 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 25 remaining) [2023-11-29 01:13:45,876 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK (17 of 25 remaining) [2023-11-29 01:13:45,876 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (16 of 25 remaining) [2023-11-29 01:13:45,876 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 25 remaining) [2023-11-29 01:13:45,876 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 25 remaining) [2023-11-29 01:13:45,876 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 25 remaining) [2023-11-29 01:13:45,877 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 25 remaining) [2023-11-29 01:13:45,877 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 25 remaining) [2023-11-29 01:13:45,877 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 25 remaining) [2023-11-29 01:13:45,877 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 25 remaining) [2023-11-29 01:13:45,877 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 25 remaining) [2023-11-29 01:13:45,878 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 25 remaining) [2023-11-29 01:13:45,878 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 25 remaining) [2023-11-29 01:13:45,878 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 25 remaining) [2023-11-29 01:13:45,878 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 25 remaining) [2023-11-29 01:13:45,878 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 25 remaining) [2023-11-29 01:13:45,878 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 25 remaining) [2023-11-29 01:13:45,879 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 25 remaining) [2023-11-29 01:13:45,879 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 25 remaining) [2023-11-29 01:13:45,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 01:13:45,879 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-29 01:13:45,882 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-29 01:13:45,882 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-29 01:13:45,917 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-29 01:13:45,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 99 places, 112 transitions, 240 flow [2023-11-29 01:13:45,942 INFO L124 PetriNetUnfolderBase]: 27/192 cut-off events. [2023-11-29 01:13:45,942 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-29 01:13:45,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 204 conditions, 192 events. 27/192 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 939 event pairs, 0 based on Foata normal form. 0/118 useless extension candidates. Maximal degree in co-relation 115. Up to 6 conditions per place. [2023-11-29 01:13:45,944 INFO L82 GeneralOperation]: Start removeDead. Operand has 99 places, 112 transitions, 240 flow [2023-11-29 01:13:45,947 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 99 places, 112 transitions, 240 flow [2023-11-29 01:13:45,948 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 01:13:45,949 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@5725c0e6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 01:13:45,950 INFO L358 AbstractCegarLoop]: Starting to check reachability of 33 error locations. [2023-11-29 01:13:45,952 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 01:13:45,952 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-29 01:13:45,952 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 01:13:45,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:13:45,952 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 01:13:45,952 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2023-11-29 01:13:45,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:13:45,953 INFO L85 PathProgramCache]: Analyzing trace with hash 491903, now seen corresponding path program 1 times [2023-11-29 01:13:45,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:13:45,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141792576] [2023-11-29 01:13:45,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:13:45,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:13:45,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:13:45,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:13:45,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:13:45,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141792576] [2023-11-29 01:13:45,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141792576] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:13:45,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:13:45,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 01:13:45,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857570971] [2023-11-29 01:13:45,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:13:45,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:13:45,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:13:45,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:13:45,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:13:46,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 112 [2023-11-29 01:13:46,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 112 transitions, 240 flow. Second operand has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:13:46,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:13:46,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 112 [2023-11-29 01:13:46,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:13:47,539 INFO L124 PetriNetUnfolderBase]: 5103/11295 cut-off events. [2023-11-29 01:13:47,539 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-11-29 01:13:47,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19477 conditions, 11295 events. 5103/11295 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 98219 event pairs, 4416 based on Foata normal form. 2239/12636 useless extension candidates. Maximal degree in co-relation 12477. Up to 7045 conditions per place. [2023-11-29 01:13:47,682 INFO L140 encePairwiseOnDemand]: 92/112 looper letters, 67 selfloop transitions, 2 changer transitions 0/117 dead transitions. [2023-11-29 01:13:47,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 117 transitions, 388 flow [2023-11-29 01:13:47,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:13:47,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 01:13:47,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 243 transitions. [2023-11-29 01:13:47,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7232142857142857 [2023-11-29 01:13:47,685 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 243 transitions. [2023-11-29 01:13:47,685 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 243 transitions. [2023-11-29 01:13:47,685 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:13:47,685 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 243 transitions. [2023-11-29 01:13:47,686 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:13:47,688 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 112.0) internal successors, (448), 4 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:13:47,688 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 112.0) internal successors, (448), 4 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:13:47,688 INFO L175 Difference]: Start difference. First operand has 99 places, 112 transitions, 240 flow. Second operand 3 states and 243 transitions. [2023-11-29 01:13:47,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 117 transitions, 388 flow [2023-11-29 01:13:47,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 117 transitions, 388 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-29 01:13:47,694 INFO L231 Difference]: Finished difference. Result has 98 places, 93 transitions, 206 flow [2023-11-29 01:13:47,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=112, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=206, PETRI_PLACES=98, PETRI_TRANSITIONS=93} [2023-11-29 01:13:47,695 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -1 predicate places. [2023-11-29 01:13:47,695 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 93 transitions, 206 flow [2023-11-29 01:13:47,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:13:47,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:13:47,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 01:13:47,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-29 01:13:47,696 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2023-11-29 01:13:47,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:13:47,697 INFO L85 PathProgramCache]: Analyzing trace with hash 491904, now seen corresponding path program 1 times [2023-11-29 01:13:47,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:13:47,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865839974] [2023-11-29 01:13:47,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:13:47,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:13:47,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:13:47,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:13:47,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:13:47,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865839974] [2023-11-29 01:13:47,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865839974] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:13:47,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:13:47,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 01:13:47,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282681790] [2023-11-29 01:13:47,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:13:47,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:13:47,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:13:47,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:13:47,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:13:47,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 112 [2023-11-29 01:13:47,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 93 transitions, 206 flow. Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:13:47,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:13:47,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 112 [2023-11-29 01:13:47,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:13:49,092 INFO L124 PetriNetUnfolderBase]: 4766/10710 cut-off events. [2023-11-29 01:13:49,092 INFO L125 PetriNetUnfolderBase]: For 169/169 co-relation queries the response was YES. [2023-11-29 01:13:49,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18548 conditions, 10710 events. 4766/10710 cut-off events. For 169/169 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 92992 event pairs, 4322 based on Foata normal form. 1/9803 useless extension candidates. Maximal degree in co-relation 15980. Up to 7553 conditions per place. [2023-11-29 01:13:49,172 INFO L140 encePairwiseOnDemand]: 108/112 looper letters, 56 selfloop transitions, 2 changer transitions 0/107 dead transitions. [2023-11-29 01:13:49,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 107 transitions, 350 flow [2023-11-29 01:13:49,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:13:49,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 01:13:49,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 213 transitions. [2023-11-29 01:13:49,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6339285714285714 [2023-11-29 01:13:49,175 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 213 transitions. [2023-11-29 01:13:49,175 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 213 transitions. [2023-11-29 01:13:49,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:13:49,176 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 213 transitions. [2023-11-29 01:13:49,177 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:13:49,178 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 112.0) internal successors, (448), 4 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:13:49,179 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 112.0) internal successors, (448), 4 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:13:49,179 INFO L175 Difference]: Start difference. First operand has 98 places, 93 transitions, 206 flow. Second operand 3 states and 213 transitions. [2023-11-29 01:13:49,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 107 transitions, 350 flow [2023-11-29 01:13:49,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 107 transitions, 346 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 01:13:49,197 INFO L231 Difference]: Finished difference. Result has 99 places, 94 transitions, 216 flow [2023-11-29 01:13:49,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=112, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=216, PETRI_PLACES=99, PETRI_TRANSITIONS=94} [2023-11-29 01:13:49,199 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, 0 predicate places. [2023-11-29 01:13:49,199 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 94 transitions, 216 flow [2023-11-29 01:13:49,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:13:49,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:13:49,199 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-11-29 01:13:49,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-29 01:13:49,200 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2023-11-29 01:13:49,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:13:49,200 INFO L85 PathProgramCache]: Analyzing trace with hash -967207713, now seen corresponding path program 1 times [2023-11-29 01:13:49,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:13:49,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568573771] [2023-11-29 01:13:49,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:13:49,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:13:49,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:13:49,310 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:13:49,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:13:49,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568573771] [2023-11-29 01:13:49,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568573771] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:13:49,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076557064] [2023-11-29 01:13:49,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:13:49,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:13:49,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86bc3d7-a198-4e4e-b473-97684492f70a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:13:49,316 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86bc3d7-a198-4e4e-b473-97684492f70a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:13:49,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86bc3d7-a198-4e4e-b473-97684492f70a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 01:13:49,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:13:49,408 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 01:13:49,410 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:13:49,423 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 8 treesize of output 1 [2023-11-29 01:13:49,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:13:49,479 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:13:49,542 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:13:49,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076557064] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:13:49,543 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:13:49,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-11-29 01:13:49,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362372532] [2023-11-29 01:13:49,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:13:49,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 01:13:49,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:13:49,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 01:13:49,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-29 01:13:49,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 112 [2023-11-29 01:13:49,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 94 transitions, 216 flow. Second operand has 7 states, 7 states have (on average 52.42857142857143) internal successors, (367), 7 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:13:49,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:13:49,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 112 [2023-11-29 01:13:49,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:13:50,654 INFO L124 PetriNetUnfolderBase]: 4657/10077 cut-off events. [2023-11-29 01:13:50,654 INFO L125 PetriNetUnfolderBase]: For 476/476 co-relation queries the response was YES. [2023-11-29 01:13:50,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17872 conditions, 10077 events. 4657/10077 cut-off events. For 476/476 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 86989 event pairs, 151 based on Foata normal form. 195/9754 useless extension candidates. Maximal degree in co-relation 15014. Up to 5497 conditions per place. [2023-11-29 01:13:50,701 INFO L140 encePairwiseOnDemand]: 108/112 looper letters, 105 selfloop transitions, 4 changer transitions 0/157 dead transitions. [2023-11-29 01:13:50,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 157 transitions, 558 flow [2023-11-29 01:13:50,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 01:13:50,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 01:13:50,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 362 transitions. [2023-11-29 01:13:50,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6464285714285715 [2023-11-29 01:13:50,704 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 362 transitions. [2023-11-29 01:13:50,704 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 362 transitions. [2023-11-29 01:13:50,705 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:13:50,705 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 362 transitions. [2023-11-29 01:13:50,706 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 72.4) internal successors, (362), 5 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:13:50,707 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 112.0) internal successors, (672), 6 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:13:50,708 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 112.0) internal successors, (672), 6 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:13:50,708 INFO L175 Difference]: Start difference. First operand has 99 places, 94 transitions, 216 flow. Second operand 5 states and 362 transitions. [2023-11-29 01:13:50,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 157 transitions, 558 flow [2023-11-29 01:13:50,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 157 transitions, 556 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 01:13:50,715 INFO L231 Difference]: Finished difference. Result has 101 places, 93 transitions, 218 flow [2023-11-29 01:13:50,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=112, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=218, PETRI_PLACES=101, PETRI_TRANSITIONS=93} [2023-11-29 01:13:50,716 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, 2 predicate places. [2023-11-29 01:13:50,716 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 93 transitions, 218 flow [2023-11-29 01:13:50,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 52.42857142857143) internal successors, (367), 7 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:13:50,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:13:50,717 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:13:50,722 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86bc3d7-a198-4e4e-b473-97684492f70a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 01:13:50,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86bc3d7-a198-4e4e-b473-97684492f70a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:13:50,918 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2023-11-29 01:13:50,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:13:50,918 INFO L85 PathProgramCache]: Analyzing trace with hash 874538271, now seen corresponding path program 1 times [2023-11-29 01:13:50,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:13:50,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061152074] [2023-11-29 01:13:50,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:13:50,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:13:50,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:13:51,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:13:51,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:13:51,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061152074] [2023-11-29 01:13:51,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061152074] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:13:51,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:13:51,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 01:13:51,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074660470] [2023-11-29 01:13:51,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:13:51,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 01:13:51,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:13:51,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 01:13:51,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 01:13:51,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 112 [2023-11-29 01:13:51,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 93 transitions, 218 flow. Second operand has 5 states, 5 states have (on average 46.6) internal successors, (233), 5 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:13:51,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:13:51,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 112 [2023-11-29 01:13:51,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:13:52,427 INFO L124 PetriNetUnfolderBase]: 5459/11877 cut-off events. [2023-11-29 01:13:52,427 INFO L125 PetriNetUnfolderBase]: For 1136/1136 co-relation queries the response was YES. [2023-11-29 01:13:52,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21373 conditions, 11877 events. 5459/11877 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 103093 event pairs, 223 based on Foata normal form. 0/11669 useless extension candidates. Maximal degree in co-relation 20718. Up to 6475 conditions per place. [2023-11-29 01:13:52,499 INFO L140 encePairwiseOnDemand]: 100/112 looper letters, 117 selfloop transitions, 8 changer transitions 0/167 dead transitions. [2023-11-29 01:13:52,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 167 transitions, 636 flow [2023-11-29 01:13:52,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 01:13:52,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 01:13:52,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 357 transitions. [2023-11-29 01:13:52,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6375 [2023-11-29 01:13:52,501 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 357 transitions. [2023-11-29 01:13:52,502 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 357 transitions. [2023-11-29 01:13:52,502 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:13:52,502 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 357 transitions. [2023-11-29 01:13:52,503 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 71.4) internal successors, (357), 5 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:13:52,505 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 112.0) internal successors, (672), 6 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:13:52,505 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 112.0) internal successors, (672), 6 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:13:52,505 INFO L175 Difference]: Start difference. First operand has 101 places, 93 transitions, 218 flow. Second operand 5 states and 357 transitions. [2023-11-29 01:13:52,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 167 transitions, 636 flow [2023-11-29 01:13:52,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 167 transitions, 619 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-11-29 01:13:52,512 INFO L231 Difference]: Finished difference. Result has 105 places, 98 transitions, 274 flow [2023-11-29 01:13:52,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=112, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=274, PETRI_PLACES=105, PETRI_TRANSITIONS=98} [2023-11-29 01:13:52,513 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, 6 predicate places. [2023-11-29 01:13:52,513 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 98 transitions, 274 flow [2023-11-29 01:13:52,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 46.6) internal successors, (233), 5 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:13:52,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:13:52,513 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:13:52,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-29 01:13:52,514 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2023-11-29 01:13:52,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:13:52,514 INFO L85 PathProgramCache]: Analyzing trace with hash 874538272, now seen corresponding path program 1 times [2023-11-29 01:13:52,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:13:52,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815567779] [2023-11-29 01:13:52,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:13:52,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:13:52,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:13:52,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:13:52,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:13:52,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815567779] [2023-11-29 01:13:52,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815567779] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:13:52,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:13:52,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 01:13:52,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957311181] [2023-11-29 01:13:52,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:13:52,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 01:13:52,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:13:52,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 01:13:52,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 01:13:52,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 112 [2023-11-29 01:13:52,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 98 transitions, 274 flow. Second operand has 5 states, 5 states have (on average 48.6) internal successors, (243), 5 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:13:52,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:13:52,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 112 [2023-11-29 01:13:52,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:13:53,685 INFO L124 PetriNetUnfolderBase]: 4647/9556 cut-off events. [2023-11-29 01:13:53,685 INFO L125 PetriNetUnfolderBase]: For 1944/1944 co-relation queries the response was YES. [2023-11-29 01:13:53,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19024 conditions, 9556 events. 4647/9556 cut-off events. For 1944/1944 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 76542 event pairs, 269 based on Foata normal form. 840/10273 useless extension candidates. Maximal degree in co-relation 18446. Up to 5489 conditions per place. [2023-11-29 01:13:53,741 INFO L140 encePairwiseOnDemand]: 104/112 looper letters, 107 selfloop transitions, 5 changer transitions 0/155 dead transitions. [2023-11-29 01:13:53,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 155 transitions, 631 flow [2023-11-29 01:13:53,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 01:13:53,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 01:13:53,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 399 transitions. [2023-11-29 01:13:53,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59375 [2023-11-29 01:13:53,744 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 399 transitions. [2023-11-29 01:13:53,744 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 399 transitions. [2023-11-29 01:13:53,745 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:13:53,745 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 399 transitions. [2023-11-29 01:13:53,746 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 66.5) internal successors, (399), 6 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:13:53,748 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 112.0) internal successors, (784), 7 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:13:53,749 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 112.0) internal successors, (784), 7 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:13:53,749 INFO L175 Difference]: Start difference. First operand has 105 places, 98 transitions, 274 flow. Second operand 6 states and 399 transitions. [2023-11-29 01:13:53,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 155 transitions, 631 flow [2023-11-29 01:13:53,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 155 transitions, 631 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-29 01:13:53,766 INFO L231 Difference]: Finished difference. Result has 105 places, 93 transitions, 274 flow [2023-11-29 01:13:53,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=112, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=274, PETRI_PLACES=105, PETRI_TRANSITIONS=93} [2023-11-29 01:13:53,767 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, 6 predicate places. [2023-11-29 01:13:53,768 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 93 transitions, 274 flow [2023-11-29 01:13:53,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.6) internal successors, (243), 5 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:13:53,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:13:53,768 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1] [2023-11-29 01:13:53,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-29 01:13:53,769 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2023-11-29 01:13:53,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:13:53,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1879396481, now seen corresponding path program 1 times [2023-11-29 01:13:53,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:13:53,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080993895] [2023-11-29 01:13:53,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:13:53,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:13:53,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 01:13:53,787 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-29 01:13:53,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 01:13:53,805 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-29 01:13:53,805 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-29 01:13:53,806 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (32 of 33 remaining) [2023-11-29 01:13:53,806 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 33 remaining) [2023-11-29 01:13:53,806 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 33 remaining) [2023-11-29 01:13:53,806 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 33 remaining) [2023-11-29 01:13:53,807 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 33 remaining) [2023-11-29 01:13:53,807 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 33 remaining) [2023-11-29 01:13:53,807 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 33 remaining) [2023-11-29 01:13:53,807 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK (25 of 33 remaining) [2023-11-29 01:13:53,807 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (24 of 33 remaining) [2023-11-29 01:13:53,807 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 33 remaining) [2023-11-29 01:13:53,807 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 33 remaining) [2023-11-29 01:13:53,807 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 33 remaining) [2023-11-29 01:13:53,808 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 33 remaining) [2023-11-29 01:13:53,808 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 33 remaining) [2023-11-29 01:13:53,808 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 33 remaining) [2023-11-29 01:13:53,808 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 33 remaining) [2023-11-29 01:13:53,808 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 33 remaining) [2023-11-29 01:13:53,808 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 33 remaining) [2023-11-29 01:13:53,808 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 33 remaining) [2023-11-29 01:13:53,808 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 33 remaining) [2023-11-29 01:13:53,809 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 33 remaining) [2023-11-29 01:13:53,809 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 33 remaining) [2023-11-29 01:13:53,809 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 33 remaining) [2023-11-29 01:13:53,809 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 33 remaining) [2023-11-29 01:13:53,809 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 33 remaining) [2023-11-29 01:13:53,809 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 33 remaining) [2023-11-29 01:13:53,809 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 33 remaining) [2023-11-29 01:13:53,809 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 33 remaining) [2023-11-29 01:13:53,810 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 33 remaining) [2023-11-29 01:13:53,810 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 33 remaining) [2023-11-29 01:13:53,810 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 33 remaining) [2023-11-29 01:13:53,810 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 33 remaining) [2023-11-29 01:13:53,810 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 33 remaining) [2023-11-29 01:13:53,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-29 01:13:53,810 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2023-11-29 01:13:53,811 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-29 01:13:53,811 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-29 01:13:53,845 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-29 01:13:53,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 131 places, 149 transitions, 325 flow [2023-11-29 01:13:53,877 INFO L124 PetriNetUnfolderBase]: 42/296 cut-off events. [2023-11-29 01:13:53,878 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-29 01:13:53,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 321 conditions, 296 events. 42/296 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1539 event pairs, 1 based on Foata normal form. 0/182 useless extension candidates. Maximal degree in co-relation 203. Up to 12 conditions per place. [2023-11-29 01:13:53,880 INFO L82 GeneralOperation]: Start removeDead. Operand has 131 places, 149 transitions, 325 flow [2023-11-29 01:13:53,884 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 131 places, 149 transitions, 325 flow [2023-11-29 01:13:53,885 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 01:13:53,886 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@5725c0e6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 01:13:53,886 INFO L358 AbstractCegarLoop]: Starting to check reachability of 41 error locations. [2023-11-29 01:13:53,887 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 01:13:53,888 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-29 01:13:53,888 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 01:13:53,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:13:53,888 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 01:13:53,888 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-11-29 01:13:53,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:13:53,889 INFO L85 PathProgramCache]: Analyzing trace with hash 639860, now seen corresponding path program 1 times [2023-11-29 01:13:53,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:13:53,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555992092] [2023-11-29 01:13:53,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:13:53,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:13:53,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:13:53,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:13:53,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:13:53,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555992092] [2023-11-29 01:13:53,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555992092] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:13:53,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:13:53,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 01:13:53,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285498473] [2023-11-29 01:13:53,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:13:53,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:13:53,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:13:53,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:13:53,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:13:53,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 149 [2023-11-29 01:13:53,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 149 transitions, 325 flow. Second operand has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:13:53,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:13:53,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 149 [2023-11-29 01:13:53,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:14:10,295 INFO L124 PetriNetUnfolderBase]: 104120/184328 cut-off events. [2023-11-29 01:14:10,295 INFO L125 PetriNetUnfolderBase]: For 1849/1849 co-relation queries the response was YES. [2023-11-29 01:14:10,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 329840 conditions, 184328 events. 104120/184328 cut-off events. For 1849/1849 co-relation queries the response was YES. Maximal size of possible extension queue 3774. Compared 1919202 event pairs, 89797 based on Foata normal form. 41132/213596 useless extension candidates. Maximal degree in co-relation 145838. Up to 124602 conditions per place. [2023-11-29 01:14:11,646 INFO L140 encePairwiseOnDemand]: 123/149 looper letters, 93 selfloop transitions, 2 changer transitions 0/160 dead transitions. [2023-11-29 01:14:11,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 160 transitions, 537 flow [2023-11-29 01:14:11,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:14:11,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 01:14:11,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 332 transitions. [2023-11-29 01:14:11,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7427293064876958 [2023-11-29 01:14:11,648 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 332 transitions. [2023-11-29 01:14:11,649 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 332 transitions. [2023-11-29 01:14:11,649 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:14:11,649 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 332 transitions. [2023-11-29 01:14:11,650 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:14:11,651 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 149.0) internal successors, (596), 4 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:14:11,652 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 149.0) internal successors, (596), 4 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:14:11,652 INFO L175 Difference]: Start difference. First operand has 131 places, 149 transitions, 325 flow. Second operand 3 states and 332 transitions. [2023-11-29 01:14:11,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 160 transitions, 537 flow [2023-11-29 01:14:11,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 160 transitions, 537 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-29 01:14:11,657 INFO L231 Difference]: Finished difference. Result has 130 places, 124 transitions, 279 flow [2023-11-29 01:14:11,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=149, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=279, PETRI_PLACES=130, PETRI_TRANSITIONS=124} [2023-11-29 01:14:11,658 INFO L281 CegarLoopForPetriNet]: 131 programPoint places, -1 predicate places. [2023-11-29 01:14:11,658 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 124 transitions, 279 flow [2023-11-29 01:14:11,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:14:11,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:14:11,658 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 01:14:11,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-29 01:14:11,658 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-11-29 01:14:11,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:14:11,659 INFO L85 PathProgramCache]: Analyzing trace with hash 639861, now seen corresponding path program 1 times [2023-11-29 01:14:11,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:14:11,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462423197] [2023-11-29 01:14:11,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:14:11,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:14:11,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:14:11,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:14:11,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:14:11,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462423197] [2023-11-29 01:14:11,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462423197] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:14:11,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:14:11,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 01:14:11,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099569589] [2023-11-29 01:14:11,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:14:11,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:14:11,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:14:11,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:14:11,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:14:11,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 149 [2023-11-29 01:14:11,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 124 transitions, 279 flow. Second operand has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:14:11,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:14:11,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 149 [2023-11-29 01:14:11,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:14:29,308 INFO L124 PetriNetUnfolderBase]: 97063/178093 cut-off events. [2023-11-29 01:14:29,309 INFO L125 PetriNetUnfolderBase]: For 3845/3845 co-relation queries the response was YES. [2023-11-29 01:14:29,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 316541 conditions, 178093 events. 97063/178093 cut-off events. For 3845/3845 co-relation queries the response was YES. Maximal size of possible extension queue 3811. Compared 1917518 event pairs, 63133 based on Foata normal form. 1/164955 useless extension candidates. Maximal degree in co-relation 270154. Up to 134378 conditions per place. [2023-11-29 01:14:30,417 INFO L140 encePairwiseOnDemand]: 145/149 looper letters, 70 selfloop transitions, 2 changer transitions 0/138 dead transitions. [2023-11-29 01:14:30,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 138 transitions, 451 flow [2023-11-29 01:14:30,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:14:30,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 01:14:30,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 278 transitions. [2023-11-29 01:14:30,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219239373601789 [2023-11-29 01:14:30,419 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 278 transitions. [2023-11-29 01:14:30,419 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 278 transitions. [2023-11-29 01:14:30,420 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:14:30,420 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 278 transitions. [2023-11-29 01:14:30,420 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:14:30,421 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 149.0) internal successors, (596), 4 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:14:30,422 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 149.0) internal successors, (596), 4 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:14:30,422 INFO L175 Difference]: Start difference. First operand has 130 places, 124 transitions, 279 flow. Second operand 3 states and 278 transitions. [2023-11-29 01:14:30,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 138 transitions, 451 flow [2023-11-29 01:14:31,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 138 transitions, 447 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 01:14:31,711 INFO L231 Difference]: Finished difference. Result has 131 places, 125 transitions, 289 flow [2023-11-29 01:14:31,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=149, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=289, PETRI_PLACES=131, PETRI_TRANSITIONS=125} [2023-11-29 01:14:31,712 INFO L281 CegarLoopForPetriNet]: 131 programPoint places, 0 predicate places. [2023-11-29 01:14:31,712 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 125 transitions, 289 flow [2023-11-29 01:14:31,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:14:31,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:14:31,713 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-11-29 01:14:31,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-29 01:14:31,713 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-11-29 01:14:31,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:14:31,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1759135087, now seen corresponding path program 1 times [2023-11-29 01:14:31,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:14:31,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918642792] [2023-11-29 01:14:31,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:14:31,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:14:31,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:14:31,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:14:31,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:14:31,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918642792] [2023-11-29 01:14:31,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918642792] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:14:31,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8495877] [2023-11-29 01:14:31,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:14:31,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:14:31,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86bc3d7-a198-4e4e-b473-97684492f70a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:14:31,798 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86bc3d7-a198-4e4e-b473-97684492f70a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:14:31,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86bc3d7-a198-4e4e-b473-97684492f70a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 01:14:31,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:14:31,899 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 01:14:31,901 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:14:31,911 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 8 treesize of output 1 [2023-11-29 01:14:31,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:14:31,954 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:14:32,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:14:32,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8495877] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:14:32,004 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:14:32,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-11-29 01:14:32,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107545144] [2023-11-29 01:14:32,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:14:32,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 01:14:32,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:14:32,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 01:14:32,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-29 01:14:32,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 149 [2023-11-29 01:14:32,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 125 transitions, 289 flow. Second operand has 7 states, 7 states have (on average 69.42857142857143) internal successors, (486), 7 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:14:32,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:14:32,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 149 [2023-11-29 01:14:32,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:14:46,795 INFO L124 PetriNetUnfolderBase]: 96954/179295 cut-off events. [2023-11-29 01:14:46,795 INFO L125 PetriNetUnfolderBase]: For 9761/9761 co-relation queries the response was YES. [2023-11-29 01:14:47,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 319546 conditions, 179295 events. 96954/179295 cut-off events. For 9761/9761 co-relation queries the response was YES. Maximal size of possible extension queue 3969. Compared 1962536 event pairs, 21524 based on Foata normal form. 2392/170808 useless extension candidates. Maximal degree in co-relation 270271. Up to 101226 conditions per place. [2023-11-29 01:14:47,787 INFO L140 encePairwiseOnDemand]: 145/149 looper letters, 169 selfloop transitions, 6 changer transitions 0/240 dead transitions. [2023-11-29 01:14:47,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 240 transitions, 871 flow [2023-11-29 01:14:47,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 01:14:47,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 01:14:47,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 581 transitions. [2023-11-29 01:14:47,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6498881431767338 [2023-11-29 01:14:47,790 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 581 transitions. [2023-11-29 01:14:47,790 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 581 transitions. [2023-11-29 01:14:47,791 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:14:47,791 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 581 transitions. [2023-11-29 01:14:47,792 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 96.83333333333333) internal successors, (581), 6 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:14:47,794 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 149.0) internal successors, (1043), 7 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:14:47,794 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 149.0) internal successors, (1043), 7 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:14:47,795 INFO L175 Difference]: Start difference. First operand has 131 places, 125 transitions, 289 flow. Second operand 6 states and 581 transitions. [2023-11-29 01:14:47,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 240 transitions, 871 flow [2023-11-29 01:14:47,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 240 transitions, 869 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 01:14:47,800 INFO L231 Difference]: Finished difference. Result has 134 places, 126 transitions, 303 flow [2023-11-29 01:14:47,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=149, PETRI_DIFFERENCE_MINUEND_FLOW=283, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=303, PETRI_PLACES=134, PETRI_TRANSITIONS=126} [2023-11-29 01:14:47,800 INFO L281 CegarLoopForPetriNet]: 131 programPoint places, 3 predicate places. [2023-11-29 01:14:47,801 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 126 transitions, 303 flow [2023-11-29 01:14:47,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 69.42857142857143) internal successors, (486), 7 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:14:47,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:14:47,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:14:47,805 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86bc3d7-a198-4e4e-b473-97684492f70a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 01:14:48,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86bc3d7-a198-4e4e-b473-97684492f70a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 01:14:48,002 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-11-29 01:14:48,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:14:48,002 INFO L85 PathProgramCache]: Analyzing trace with hash -993583849, now seen corresponding path program 1 times [2023-11-29 01:14:48,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:14:48,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487351123] [2023-11-29 01:14:48,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:14:48,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:14:48,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:14:48,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:14:48,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:14:48,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487351123] [2023-11-29 01:14:48,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487351123] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:14:48,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:14:48,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 01:14:48,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485645874] [2023-11-29 01:14:48,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:14:48,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 01:14:48,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:14:48,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 01:14:48,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 01:14:48,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 149 [2023-11-29 01:14:48,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 126 transitions, 303 flow. Second operand has 5 states, 5 states have (on average 63.6) internal successors, (318), 5 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:14:48,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:14:48,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 149 [2023-11-29 01:14:48,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:15:04,657 INFO L124 PetriNetUnfolderBase]: 114902/201073 cut-off events. [2023-11-29 01:15:04,658 INFO L125 PetriNetUnfolderBase]: For 16004/16004 co-relation queries the response was YES. [2023-11-29 01:15:05,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 371845 conditions, 201073 events. 114902/201073 cut-off events. For 16004/16004 co-relation queries the response was YES. Maximal size of possible extension queue 4006. Compared 2074902 event pairs, 67495 based on Foata normal form. 0/191750 useless extension candidates. Maximal degree in co-relation 275496. Up to 117340 conditions per place. [2023-11-29 01:15:05,811 INFO L140 encePairwiseOnDemand]: 137/149 looper letters, 173 selfloop transitions, 8 changer transitions 0/240 dead transitions. [2023-11-29 01:15:05,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 240 transitions, 931 flow [2023-11-29 01:15:05,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 01:15:05,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 01:15:05,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 494 transitions. [2023-11-29 01:15:05,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6630872483221476 [2023-11-29 01:15:05,814 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 494 transitions. [2023-11-29 01:15:05,814 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 494 transitions. [2023-11-29 01:15:05,815 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:15:05,815 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 494 transitions. [2023-11-29 01:15:05,816 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 98.8) internal successors, (494), 5 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:15:05,817 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 149.0) internal successors, (894), 6 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:15:05,818 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 149.0) internal successors, (894), 6 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:15:05,818 INFO L175 Difference]: Start difference. First operand has 134 places, 126 transitions, 303 flow. Second operand 5 states and 494 transitions. [2023-11-29 01:15:05,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 240 transitions, 931 flow [2023-11-29 01:15:05,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 240 transitions, 904 flow, removed 8 selfloop flow, removed 3 redundant places. [2023-11-29 01:15:05,826 INFO L231 Difference]: Finished difference. Result has 138 places, 131 transitions, 354 flow [2023-11-29 01:15:05,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=149, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=354, PETRI_PLACES=138, PETRI_TRANSITIONS=131} [2023-11-29 01:15:05,827 INFO L281 CegarLoopForPetriNet]: 131 programPoint places, 7 predicate places. [2023-11-29 01:15:05,827 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 131 transitions, 354 flow [2023-11-29 01:15:05,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 63.6) internal successors, (318), 5 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:15:05,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:15:05,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:15:05,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-29 01:15:05,828 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-11-29 01:15:05,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:15:05,828 INFO L85 PathProgramCache]: Analyzing trace with hash -993583848, now seen corresponding path program 1 times [2023-11-29 01:15:05,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:15:05,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101438726] [2023-11-29 01:15:05,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:15:05,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:15:05,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:15:05,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:15:05,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:15:05,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101438726] [2023-11-29 01:15:05,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101438726] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:15:05,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:15:05,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 01:15:05,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852616982] [2023-11-29 01:15:05,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:15:05,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 01:15:05,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:15:05,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 01:15:05,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 01:15:06,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 149 [2023-11-29 01:15:06,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 131 transitions, 354 flow. Second operand has 5 states, 5 states have (on average 65.6) internal successors, (328), 5 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:15:06,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:15:06,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 149 [2023-11-29 01:15:06,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:15:21,248 INFO L124 PetriNetUnfolderBase]: 97966/174594 cut-off events. [2023-11-29 01:15:21,248 INFO L125 PetriNetUnfolderBase]: For 31781/31890 co-relation queries the response was YES. [2023-11-29 01:15:21,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 339562 conditions, 174594 events. 97966/174594 cut-off events. For 31781/31890 co-relation queries the response was YES. Maximal size of possible extension queue 3559. Compared 1811631 event pairs, 58949 based on Foata normal form. 11598/177595 useless extension candidates. Maximal degree in co-relation 306093. Up to 99792 conditions per place. [2023-11-29 01:15:22,456 INFO L140 encePairwiseOnDemand]: 141/149 looper letters, 163 selfloop transitions, 5 changer transitions 0/228 dead transitions. [2023-11-29 01:15:22,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 228 transitions, 916 flow [2023-11-29 01:15:22,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 01:15:22,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 01:15:22,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 553 transitions. [2023-11-29 01:15:22,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6185682326621924 [2023-11-29 01:15:22,459 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 553 transitions. [2023-11-29 01:15:22,459 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 553 transitions. [2023-11-29 01:15:22,460 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:15:22,460 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 553 transitions. [2023-11-29 01:15:22,463 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 92.16666666666667) internal successors, (553), 6 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:15:22,465 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 149.0) internal successors, (1043), 7 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:15:22,466 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 149.0) internal successors, (1043), 7 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:15:22,466 INFO L175 Difference]: Start difference. First operand has 138 places, 131 transitions, 354 flow. Second operand 6 states and 553 transitions. [2023-11-29 01:15:22,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 228 transitions, 916 flow [2023-11-29 01:15:22,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 228 transitions, 916 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-29 01:15:22,568 INFO L231 Difference]: Finished difference. Result has 138 places, 126 transitions, 354 flow [2023-11-29 01:15:22,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=149, PETRI_DIFFERENCE_MINUEND_FLOW=344, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=354, PETRI_PLACES=138, PETRI_TRANSITIONS=126} [2023-11-29 01:15:22,569 INFO L281 CegarLoopForPetriNet]: 131 programPoint places, 7 predicate places. [2023-11-29 01:15:22,569 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 126 transitions, 354 flow [2023-11-29 01:15:22,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 65.6) internal successors, (328), 5 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:15:22,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:15:22,570 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:15:22,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-29 01:15:22,570 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-11-29 01:15:22,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:15:22,570 INFO L85 PathProgramCache]: Analyzing trace with hash -990468340, now seen corresponding path program 1 times [2023-11-29 01:15:22,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:15:22,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889750676] [2023-11-29 01:15:22,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:15:22,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:15:22,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:15:22,679 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 01:15:22,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:15:22,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889750676] [2023-11-29 01:15:22,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889750676] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:15:22,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:15:22,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 01:15:22,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179393171] [2023-11-29 01:15:22,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:15:22,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 01:15:22,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:15:22,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 01:15:22,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 01:15:22,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 149 [2023-11-29 01:15:22,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 126 transitions, 354 flow. Second operand has 5 states, 5 states have (on average 64.4) internal successors, (322), 5 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:15:22,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:15:22,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 149 [2023-11-29 01:15:22,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:15:43,488 INFO L124 PetriNetUnfolderBase]: 129428/230500 cut-off events. [2023-11-29 01:15:43,488 INFO L125 PetriNetUnfolderBase]: For 59773/60753 co-relation queries the response was YES. [2023-11-29 01:15:44,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 453177 conditions, 230500 events. 129428/230500 cut-off events. For 59773/60753 co-relation queries the response was YES. Maximal size of possible extension queue 4686. Compared 2486919 event pairs, 8524 based on Foata normal form. 0/226356 useless extension candidates. Maximal degree in co-relation 414936. Up to 117244 conditions per place. [2023-11-29 01:15:44,886 INFO L140 encePairwiseOnDemand]: 138/149 looper letters, 177 selfloop transitions, 10 changer transitions 0/241 dead transitions. [2023-11-29 01:15:44,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 241 transitions, 1035 flow [2023-11-29 01:15:44,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 01:15:44,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 01:15:44,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 491 transitions. [2023-11-29 01:15:44,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6590604026845638 [2023-11-29 01:15:44,889 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 491 transitions. [2023-11-29 01:15:44,889 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 491 transitions. [2023-11-29 01:15:44,889 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:15:44,889 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 491 transitions. [2023-11-29 01:15:44,890 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 98.2) internal successors, (491), 5 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:15:44,892 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 149.0) internal successors, (894), 6 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:15:44,892 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 149.0) internal successors, (894), 6 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:15:44,892 INFO L175 Difference]: Start difference. First operand has 138 places, 126 transitions, 354 flow. Second operand 5 states and 491 transitions. [2023-11-29 01:15:44,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 241 transitions, 1035 flow [2023-11-29 01:15:45,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 241 transitions, 1016 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-11-29 01:15:45,232 INFO L231 Difference]: Finished difference. Result has 142 places, 133 transitions, 430 flow [2023-11-29 01:15:45,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=149, PETRI_DIFFERENCE_MINUEND_FLOW=343, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=430, PETRI_PLACES=142, PETRI_TRANSITIONS=133} [2023-11-29 01:15:45,233 INFO L281 CegarLoopForPetriNet]: 131 programPoint places, 11 predicate places. [2023-11-29 01:15:45,233 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 133 transitions, 430 flow [2023-11-29 01:15:45,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.4) internal successors, (322), 5 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:15:45,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:15:45,234 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:15:45,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-29 01:15:45,234 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-11-29 01:15:45,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:15:45,234 INFO L85 PathProgramCache]: Analyzing trace with hash -990468339, now seen corresponding path program 1 times [2023-11-29 01:15:45,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:15:45,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198161804] [2023-11-29 01:15:45,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:15:45,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:15:45,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:15:45,356 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 01:15:45,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:15:45,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198161804] [2023-11-29 01:15:45,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198161804] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:15:45,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775579982] [2023-11-29 01:15:45,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:15:45,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:15:45,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86bc3d7-a198-4e4e-b473-97684492f70a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:15:45,357 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86bc3d7-a198-4e4e-b473-97684492f70a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:15:45,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86bc3d7-a198-4e4e-b473-97684492f70a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 01:15:45,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:15:45,468 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 01:15:45,469 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:15:45,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:15:45,483 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 14 treesize of output 9 [2023-11-29 01:15:45,578 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 01:15:45,579 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:15:45,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775579982] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:15:45,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 01:15:45,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-11-29 01:15:45,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625215817] [2023-11-29 01:15:45,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:15:45,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 01:15:45,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:15:45,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 01:15:45,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-29 01:15:45,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 149 [2023-11-29 01:15:45,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 133 transitions, 430 flow. Second operand has 4 states, 4 states have (on average 66.25) internal successors, (265), 4 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:15:45,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:15:45,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 149 [2023-11-29 01:15:45,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:16:02,884 INFO L124 PetriNetUnfolderBase]: 110228/188066 cut-off events. [2023-11-29 01:16:02,884 INFO L125 PetriNetUnfolderBase]: For 72658/74111 co-relation queries the response was YES. [2023-11-29 01:16:03,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 402253 conditions, 188066 events. 110228/188066 cut-off events. For 72658/74111 co-relation queries the response was YES. Maximal size of possible extension queue 3805. Compared 1893534 event pairs, 15978 based on Foata normal form. 13408/198995 useless extension candidates. Maximal degree in co-relation 345321. Up to 146696 conditions per place. [2023-11-29 01:16:04,206 INFO L140 encePairwiseOnDemand]: 143/149 looper letters, 117 selfloop transitions, 3 changer transitions 0/176 dead transitions. [2023-11-29 01:16:04,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 176 transitions, 804 flow [2023-11-29 01:16:04,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 01:16:04,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 01:16:04,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 358 transitions. [2023-11-29 01:16:04,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6006711409395973 [2023-11-29 01:16:04,209 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 358 transitions. [2023-11-29 01:16:04,209 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 358 transitions. [2023-11-29 01:16:04,209 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:16:04,209 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 358 transitions. [2023-11-29 01:16:04,210 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 89.5) internal successors, (358), 4 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:16:04,211 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 149.0) internal successors, (745), 5 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:16:04,211 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 149.0) internal successors, (745), 5 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:16:04,211 INFO L175 Difference]: Start difference. First operand has 142 places, 133 transitions, 430 flow. Second operand 4 states and 358 transitions. [2023-11-29 01:16:04,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 176 transitions, 804 flow [2023-11-29 01:16:06,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 176 transitions, 804 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-29 01:16:06,505 INFO L231 Difference]: Finished difference. Result has 141 places, 129 transitions, 428 flow [2023-11-29 01:16:06,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=149, PETRI_DIFFERENCE_MINUEND_FLOW=422, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=428, PETRI_PLACES=141, PETRI_TRANSITIONS=129} [2023-11-29 01:16:06,506 INFO L281 CegarLoopForPetriNet]: 131 programPoint places, 10 predicate places. [2023-11-29 01:16:06,506 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 129 transitions, 428 flow [2023-11-29 01:16:06,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 66.25) internal successors, (265), 4 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:16:06,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:16:06,506 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1] [2023-11-29 01:16:06,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86bc3d7-a198-4e4e-b473-97684492f70a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-29 01:16:06,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86bc3d7-a198-4e4e-b473-97684492f70a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 01:16:06,707 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-11-29 01:16:06,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:16:06,707 INFO L85 PathProgramCache]: Analyzing trace with hash -67986672, now seen corresponding path program 1 times [2023-11-29 01:16:06,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:16:06,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685738494] [2023-11-29 01:16:06,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:16:06,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:16:06,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 01:16:06,725 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-29 01:16:06,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 01:16:06,745 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-29 01:16:06,745 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-29 01:16:06,745 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (40 of 41 remaining) [2023-11-29 01:16:06,746 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 41 remaining) [2023-11-29 01:16:06,746 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 41 remaining) [2023-11-29 01:16:06,746 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 41 remaining) [2023-11-29 01:16:06,746 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 41 remaining) [2023-11-29 01:16:06,746 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 41 remaining) [2023-11-29 01:16:06,746 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 41 remaining) [2023-11-29 01:16:06,746 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK (33 of 41 remaining) [2023-11-29 01:16:06,747 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (32 of 41 remaining) [2023-11-29 01:16:06,747 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 41 remaining) [2023-11-29 01:16:06,747 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 41 remaining) [2023-11-29 01:16:06,747 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 41 remaining) [2023-11-29 01:16:06,747 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 41 remaining) [2023-11-29 01:16:06,747 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 41 remaining) [2023-11-29 01:16:06,747 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 41 remaining) [2023-11-29 01:16:06,747 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 41 remaining) [2023-11-29 01:16:06,748 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 41 remaining) [2023-11-29 01:16:06,748 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 41 remaining) [2023-11-29 01:16:06,748 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 41 remaining) [2023-11-29 01:16:06,748 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 41 remaining) [2023-11-29 01:16:06,748 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 41 remaining) [2023-11-29 01:16:06,748 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 41 remaining) [2023-11-29 01:16:06,748 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 41 remaining) [2023-11-29 01:16:06,749 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 41 remaining) [2023-11-29 01:16:06,749 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 41 remaining) [2023-11-29 01:16:06,749 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 41 remaining) [2023-11-29 01:16:06,749 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 41 remaining) [2023-11-29 01:16:06,749 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 41 remaining) [2023-11-29 01:16:06,749 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 41 remaining) [2023-11-29 01:16:06,749 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 41 remaining) [2023-11-29 01:16:06,750 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 41 remaining) [2023-11-29 01:16:06,750 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 41 remaining) [2023-11-29 01:16:06,750 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 41 remaining) [2023-11-29 01:16:06,750 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 41 remaining) [2023-11-29 01:16:06,750 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 41 remaining) [2023-11-29 01:16:06,750 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 41 remaining) [2023-11-29 01:16:06,751 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 41 remaining) [2023-11-29 01:16:06,751 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 41 remaining) [2023-11-29 01:16:06,751 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 41 remaining) [2023-11-29 01:16:06,751 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 41 remaining) [2023-11-29 01:16:06,751 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 41 remaining) [2023-11-29 01:16:06,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-29 01:16:06,752 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:16:06,752 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-29 01:16:06,752 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-29 01:16:06,788 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-29 01:16:06,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 163 places, 186 transitions, 412 flow [2023-11-29 01:16:06,840 INFO L124 PetriNetUnfolderBase]: 65/444 cut-off events. [2023-11-29 01:16:06,840 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-29 01:16:06,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 495 conditions, 444 events. 65/444 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 2418 event pairs, 6 based on Foata normal form. 0/274 useless extension candidates. Maximal degree in co-relation 320. Up to 32 conditions per place. [2023-11-29 01:16:06,843 INFO L82 GeneralOperation]: Start removeDead. Operand has 163 places, 186 transitions, 412 flow [2023-11-29 01:16:06,847 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 163 places, 186 transitions, 412 flow [2023-11-29 01:16:06,848 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 01:16:06,849 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@5725c0e6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 01:16:06,849 INFO L358 AbstractCegarLoop]: Starting to check reachability of 49 error locations. [2023-11-29 01:16:06,851 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 01:16:06,851 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-29 01:16:06,851 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 01:16:06,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:16:06,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 01:16:06,852 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-11-29 01:16:06,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:16:06,852 INFO L85 PathProgramCache]: Analyzing trace with hash 824558, now seen corresponding path program 1 times [2023-11-29 01:16:06,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:16:06,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147717157] [2023-11-29 01:16:06,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:16:06,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:16:06,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:16:06,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:16:06,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:16:06,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147717157] [2023-11-29 01:16:06,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147717157] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:16:06,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:16:06,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 01:16:06,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504839840] [2023-11-29 01:16:06,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:16:06,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:16:06,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:16:06,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:16:06,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:16:06,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 186 [2023-11-29 01:16:06,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 186 transitions, 412 flow. Second operand has 3 states, 3 states have (on average 83.0) internal successors, (249), 3 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:16:06,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:16:06,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 186 [2023-11-29 01:16:06,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand