./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/09-regions_13-arraycollapse_nr.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4793a29-3835-47eb-ad86-573dc0cea74e/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4793a29-3835-47eb-ad86-573dc0cea74e/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_c4793a29-3835-47eb-ad86-573dc0cea74e/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4793a29-3835-47eb-ad86-573dc0cea74e/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/09-regions_13-arraycollapse_nr.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4793a29-3835-47eb-ad86-573dc0cea74e/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_c4793a29-3835-47eb-ad86-573dc0cea74e/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 b018c23c1a90f89310fc4f08bf16b02660af5a398ccd47f63d319e7a234c112b --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-28 23:55:51,961 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-28 23:55:52,027 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4793a29-3835-47eb-ad86-573dc0cea74e/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-28 23:55:52,031 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-28 23:55:52,032 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-28 23:55:52,057 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-28 23:55:52,058 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-28 23:55:52,059 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-28 23:55:52,059 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-28 23:55:52,060 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-28 23:55:52,060 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-28 23:55:52,061 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-28 23:55:52,062 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-28 23:55:52,062 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-28 23:55:52,062 INFO L153 SettingsManager]: * Use SBE=true [2023-11-28 23:55:52,063 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-28 23:55:52,064 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-28 23:55:52,064 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-28 23:55:52,064 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-28 23:55:52,065 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-28 23:55:52,065 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-28 23:55:52,069 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-28 23:55:52,069 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-28 23:55:52,070 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-28 23:55:52,070 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-28 23:55:52,071 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-28 23:55:52,071 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-28 23:55:52,072 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-28 23:55:52,072 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-28 23:55:52,072 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-28 23:55:52,073 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-28 23:55:52,073 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-28 23:55:52,073 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 23:55:52,074 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-28 23:55:52,074 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-28 23:55:52,074 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-28 23:55:52,074 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-28 23:55:52,074 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-28 23:55:52,074 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-28 23:55:52,075 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-28 23:55:52,075 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-28 23:55:52,075 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_c4793a29-3835-47eb-ad86-573dc0cea74e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4793a29-3835-47eb-ad86-573dc0cea74e/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b018c23c1a90f89310fc4f08bf16b02660af5a398ccd47f63d319e7a234c112b [2023-11-28 23:55:52,316 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-28 23:55:52,338 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-28 23:55:52,341 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-28 23:55:52,342 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-28 23:55:52,343 INFO L274 PluginConnector]: CDTParser initialized [2023-11-28 23:55:52,344 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4793a29-3835-47eb-ad86-573dc0cea74e/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/goblint-regression/09-regions_13-arraycollapse_nr.i [2023-11-28 23:55:55,098 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-28 23:55:55,348 INFO L384 CDTParser]: Found 1 translation units. [2023-11-28 23:55:55,349 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4793a29-3835-47eb-ad86-573dc0cea74e/sv-benchmarks/c/goblint-regression/09-regions_13-arraycollapse_nr.i [2023-11-28 23:55:55,369 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4793a29-3835-47eb-ad86-573dc0cea74e/bin/uautomizer-verify-BQ2R08f2Ya/data/9fc8ee02f/6fc81c799e91471989b0a2c3b30f3f93/FLAG1ce73a820 [2023-11-28 23:55:55,383 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4793a29-3835-47eb-ad86-573dc0cea74e/bin/uautomizer-verify-BQ2R08f2Ya/data/9fc8ee02f/6fc81c799e91471989b0a2c3b30f3f93 [2023-11-28 23:55:55,386 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-28 23:55:55,387 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-28 23:55:55,389 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-28 23:55:55,389 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-28 23:55:55,394 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-28 23:55:55,395 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 11:55:55" (1/1) ... [2023-11-28 23:55:55,396 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ff080b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:55:55, skipping insertion in model container [2023-11-28 23:55:55,396 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 11:55:55" (1/1) ... [2023-11-28 23:55:55,454 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-28 23:55:56,004 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 23:55:56,020 INFO L202 MainTranslator]: Completed pre-run [2023-11-28 23:55:56,072 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 23:55:56,141 INFO L206 MainTranslator]: Completed translation [2023-11-28 23:55:56,141 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:55:56 WrapperNode [2023-11-28 23:55:56,141 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-28 23:55:56,142 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-28 23:55:56,143 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-28 23:55:56,143 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-28 23:55:56,148 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:55:56" (1/1) ... [2023-11-28 23:55:56,171 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:55:56" (1/1) ... [2023-11-28 23:55:56,204 INFO L138 Inliner]: procedures = 371, calls = 39, calls flagged for inlining = 14, calls inlined = 14, statements flattened = 174 [2023-11-28 23:55:56,205 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-28 23:55:56,205 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-28 23:55:56,205 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-28 23:55:56,206 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-28 23:55:56,217 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:55:56" (1/1) ... [2023-11-28 23:55:56,217 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:55:56" (1/1) ... [2023-11-28 23:55:56,223 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:55:56" (1/1) ... [2023-11-28 23:55:56,260 INFO L175 MemorySlicer]: Split 33 memory accesses to 4 slices as follows [24, 1, 7, 1]. 73 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0, 0, 0, 0]. The 22 writes are split as follows [18, 1, 2, 1]. [2023-11-28 23:55:56,260 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:55:56" (1/1) ... [2023-11-28 23:55:56,261 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:55:56" (1/1) ... [2023-11-28 23:55:56,276 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:55:56" (1/1) ... [2023-11-28 23:55:56,279 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:55:56" (1/1) ... [2023-11-28 23:55:56,283 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:55:56" (1/1) ... [2023-11-28 23:55:56,299 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:55:56" (1/1) ... [2023-11-28 23:55:56,304 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-28 23:55:56,305 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-28 23:55:56,305 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-28 23:55:56,305 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-28 23:55:56,305 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:55:56" (1/1) ... [2023-11-28 23:55:56,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 23:55:56,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4793a29-3835-47eb-ad86-573dc0cea74e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:55:56,342 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4793a29-3835-47eb-ad86-573dc0cea74e/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-28 23:55:56,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4793a29-3835-47eb-ad86-573dc0cea74e/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-28 23:55:56,377 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-28 23:55:56,377 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-28 23:55:56,378 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-28 23:55:56,378 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-11-28 23:55:56,378 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2023-11-28 23:55:56,378 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-28 23:55:56,378 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-28 23:55:56,378 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-28 23:55:56,378 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-28 23:55:56,379 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-28 23:55:56,379 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-28 23:55:56,379 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-28 23:55:56,379 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-28 23:55:56,379 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-28 23:55:56,379 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-28 23:55:56,379 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-28 23:55:56,380 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-28 23:55:56,380 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-28 23:55:56,380 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-28 23:55:56,380 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-28 23:55:56,380 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-11-28 23:55:56,380 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2023-11-28 23:55:56,380 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-28 23:55:56,381 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-28 23:55:56,381 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-28 23:55:56,381 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-28 23:55:56,383 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-28 23:55:56,562 INFO L241 CfgBuilder]: Building ICFG [2023-11-28 23:55:56,565 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-28 23:55:57,017 INFO L282 CfgBuilder]: Performing block encoding [2023-11-28 23:55:57,251 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-28 23:55:57,251 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-28 23:55:57,252 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 11:55:57 BoogieIcfgContainer [2023-11-28 23:55:57,252 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-28 23:55:57,255 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-28 23:55:57,255 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-28 23:55:57,258 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-28 23:55:57,258 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 11:55:55" (1/3) ... [2023-11-28 23:55:57,259 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54d507b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 11:55:57, skipping insertion in model container [2023-11-28 23:55:57,259 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:55:56" (2/3) ... [2023-11-28 23:55:57,259 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54d507b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 11:55:57, skipping insertion in model container [2023-11-28 23:55:57,259 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 11:55:57" (3/3) ... [2023-11-28 23:55:57,261 INFO L112 eAbstractionObserver]: Analyzing ICFG 09-regions_13-arraycollapse_nr.i [2023-11-28 23:55:57,280 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-28 23:55:57,280 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 63 error locations. [2023-11-28 23:55:57,281 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-28 23:55:57,348 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-28 23:55:57,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 113 places, 110 transitions, 224 flow [2023-11-28 23:55:57,444 INFO L124 PetriNetUnfolderBase]: 1/109 cut-off events. [2023-11-28 23:55:57,444 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-28 23:55:57,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113 conditions, 109 events. 1/109 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 333 event pairs, 0 based on Foata normal form. 0/45 useless extension candidates. Maximal degree in co-relation 69. Up to 2 conditions per place. [2023-11-28 23:55:57,447 INFO L82 GeneralOperation]: Start removeDead. Operand has 113 places, 110 transitions, 224 flow [2023-11-28 23:55:57,452 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 112 places, 109 transitions, 221 flow [2023-11-28 23:55:57,463 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-28 23:55:57,469 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;@4f151364, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-28 23:55:57,470 INFO L358 AbstractCegarLoop]: Starting to check reachability of 76 error locations. [2023-11-28 23:55:57,473 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-28 23:55:57,473 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-28 23:55:57,473 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-28 23:55:57,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:55:57,474 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-28 23:55:57,474 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 73 more)] === [2023-11-28 23:55:57,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:55:57,480 INFO L85 PathProgramCache]: Analyzing trace with hash 549583, now seen corresponding path program 1 times [2023-11-28 23:55:57,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:55:57,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999467729] [2023-11-28 23:55:57,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:55:57,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:55:57,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:57,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:55:57,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:55:57,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999467729] [2023-11-28 23:55:57,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999467729] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:55:57,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:55:57,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-28 23:55:57,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593426645] [2023-11-28 23:55:57,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:55:57,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 23:55:57,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:55:57,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 23:55:57,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:55:57,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 110 [2023-11-28 23:55:57,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 109 transitions, 221 flow. Second operand has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 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) [2023-11-28 23:55:57,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:55:57,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 110 [2023-11-28 23:55:57,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:55:58,053 INFO L124 PetriNetUnfolderBase]: 64/296 cut-off events. [2023-11-28 23:55:58,054 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-28 23:55:58,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 465 conditions, 296 events. 64/296 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1331 event pairs, 63 based on Foata normal form. 0/227 useless extension candidates. Maximal degree in co-relation 376. Up to 157 conditions per place. [2023-11-28 23:55:58,059 INFO L140 encePairwiseOnDemand]: 94/110 looper letters, 30 selfloop transitions, 8 changer transitions 0/101 dead transitions. [2023-11-28 23:55:58,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 101 transitions, 281 flow [2023-11-28 23:55:58,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 23:55:58,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-28 23:55:58,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 238 transitions. [2023-11-28 23:55:58,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7212121212121212 [2023-11-28 23:55:58,074 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 238 transitions. [2023-11-28 23:55:58,074 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 238 transitions. [2023-11-28 23:55:58,076 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:55:58,078 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 238 transitions. [2023-11-28 23:55:58,082 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 79.33333333333333) internal successors, (238), 3 states have internal predecessors, (238), 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) [2023-11-28 23:55:58,086 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 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) [2023-11-28 23:55:58,087 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 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) [2023-11-28 23:55:58,089 INFO L175 Difference]: Start difference. First operand has 112 places, 109 transitions, 221 flow. Second operand 3 states and 238 transitions. [2023-11-28 23:55:58,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 101 transitions, 281 flow [2023-11-28 23:55:58,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 101 transitions, 280 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-28 23:55:58,096 INFO L231 Difference]: Finished difference. Result has 105 places, 101 transitions, 220 flow [2023-11-28 23:55:58,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=220, PETRI_PLACES=105, PETRI_TRANSITIONS=101} [2023-11-28 23:55:58,102 INFO L281 CegarLoopForPetriNet]: 112 programPoint places, -7 predicate places. [2023-11-28 23:55:58,102 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 101 transitions, 220 flow [2023-11-28 23:55:58,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 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) [2023-11-28 23:55:58,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:55:58,103 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-28 23:55:58,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-28 23:55:58,104 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 73 more)] === [2023-11-28 23:55:58,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:55:58,104 INFO L85 PathProgramCache]: Analyzing trace with hash 549584, now seen corresponding path program 1 times [2023-11-28 23:55:58,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:55:58,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431423871] [2023-11-28 23:55:58,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:55:58,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:55:58,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:58,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:55:58,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:55:58,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431423871] [2023-11-28 23:55:58,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431423871] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:55:58,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:55:58,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-28 23:55:58,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033340626] [2023-11-28 23:55:58,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:55:58,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 23:55:58,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:55:58,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 23:55:58,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:55:58,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 110 [2023-11-28 23:55:58,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 101 transitions, 220 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) [2023-11-28 23:55:58,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:55:58,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 110 [2023-11-28 23:55:58,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:55:58,465 INFO L124 PetriNetUnfolderBase]: 64/288 cut-off events. [2023-11-28 23:55:58,465 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-11-28 23:55:58,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 461 conditions, 288 events. 64/288 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1278 event pairs, 63 based on Foata normal form. 8/227 useless extension candidates. Maximal degree in co-relation 398. Up to 157 conditions per place. [2023-11-28 23:55:58,487 INFO L140 encePairwiseOnDemand]: 94/110 looper letters, 26 selfloop transitions, 8 changer transitions 0/93 dead transitions. [2023-11-28 23:55:58,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 93 transitions, 272 flow [2023-11-28 23:55:58,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 23:55:58,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-28 23:55:58,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 246 transitions. [2023-11-28 23:55:58,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7454545454545455 [2023-11-28 23:55:58,490 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 246 transitions. [2023-11-28 23:55:58,490 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 246 transitions. [2023-11-28 23:55:58,491 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:55:58,491 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 246 transitions. [2023-11-28 23:55:58,493 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 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) [2023-11-28 23:55:58,494 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 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) [2023-11-28 23:55:58,495 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 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) [2023-11-28 23:55:58,495 INFO L175 Difference]: Start difference. First operand has 105 places, 101 transitions, 220 flow. Second operand 3 states and 246 transitions. [2023-11-28 23:55:58,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 93 transitions, 272 flow [2023-11-28 23:55:58,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 93 transitions, 256 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-28 23:55:58,499 INFO L231 Difference]: Finished difference. Result has 97 places, 93 transitions, 204 flow [2023-11-28 23:55:58,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=204, PETRI_PLACES=97, PETRI_TRANSITIONS=93} [2023-11-28 23:55:58,500 INFO L281 CegarLoopForPetriNet]: 112 programPoint places, -15 predicate places. [2023-11-28 23:55:58,500 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 93 transitions, 204 flow [2023-11-28 23:55:58,500 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) [2023-11-28 23:55:58,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:55:58,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-28 23:55:58,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-28 23:55:58,501 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 73 more)] === [2023-11-28 23:55:58,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:55:58,502 INFO L85 PathProgramCache]: Analyzing trace with hash 528166549, now seen corresponding path program 1 times [2023-11-28 23:55:58,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:55:58,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880353624] [2023-11-28 23:55:58,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:55:58,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:55:58,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:58,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:55:58,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:55:58,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880353624] [2023-11-28 23:55:58,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880353624] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:55:58,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:55:58,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-28 23:55:58,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285607089] [2023-11-28 23:55:58,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:55:58,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-28 23:55:58,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:55:58,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-28 23:55:58,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-28 23:55:59,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 110 [2023-11-28 23:55:59,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 93 transitions, 204 flow. Second operand has 6 states, 6 states have (on average 65.83333333333333) internal successors, (395), 6 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:55:59,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:55:59,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 110 [2023-11-28 23:55:59,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:55:59,202 INFO L124 PetriNetUnfolderBase]: 77/340 cut-off events. [2023-11-28 23:55:59,202 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-28 23:55:59,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 552 conditions, 340 events. 77/340 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1617 event pairs, 55 based on Foata normal form. 1/269 useless extension candidates. Maximal degree in co-relation 488. Up to 145 conditions per place. [2023-11-28 23:55:59,206 INFO L140 encePairwiseOnDemand]: 101/110 looper letters, 51 selfloop transitions, 3 changer transitions 0/102 dead transitions. [2023-11-28 23:55:59,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 102 transitions, 330 flow [2023-11-28 23:55:59,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 23:55:59,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-28 23:55:59,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 320 transitions. [2023-11-28 23:55:59,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7272727272727273 [2023-11-28 23:55:59,208 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 320 transitions. [2023-11-28 23:55:59,208 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 320 transitions. [2023-11-28 23:55:59,209 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:55:59,209 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 320 transitions. [2023-11-28 23:55:59,210 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 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) [2023-11-28 23:55:59,212 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 110.0) internal successors, (550), 5 states have internal predecessors, (550), 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) [2023-11-28 23:55:59,213 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 110.0) internal successors, (550), 5 states have internal predecessors, (550), 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) [2023-11-28 23:55:59,213 INFO L175 Difference]: Start difference. First operand has 97 places, 93 transitions, 204 flow. Second operand 4 states and 320 transitions. [2023-11-28 23:55:59,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 102 transitions, 330 flow [2023-11-28 23:55:59,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 102 transitions, 314 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-28 23:55:59,216 INFO L231 Difference]: Finished difference. Result has 95 places, 89 transitions, 195 flow [2023-11-28 23:55:59,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=195, PETRI_PLACES=95, PETRI_TRANSITIONS=89} [2023-11-28 23:55:59,218 INFO L281 CegarLoopForPetriNet]: 112 programPoint places, -17 predicate places. [2023-11-28 23:55:59,218 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 89 transitions, 195 flow [2023-11-28 23:55:59,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 65.83333333333333) internal successors, (395), 6 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:55:59,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:55:59,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-28 23:55:59,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-28 23:55:59,219 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 73 more)] === [2023-11-28 23:55:59,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:55:59,220 INFO L85 PathProgramCache]: Analyzing trace with hash 528166550, now seen corresponding path program 1 times [2023-11-28 23:55:59,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:55:59,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165275425] [2023-11-28 23:55:59,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:55:59,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:55:59,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:55:59,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:55:59,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:55:59,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165275425] [2023-11-28 23:55:59,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165275425] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:55:59,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:55:59,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 23:55:59,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399404770] [2023-11-28 23:55:59,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:55:59,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-28 23:55:59,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:55:59,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-28 23:55:59,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-28 23:55:59,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 110 [2023-11-28 23:55:59,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 89 transitions, 195 flow. Second operand has 5 states, 5 states have (on average 60.8) internal successors, (304), 5 states have internal predecessors, (304), 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) [2023-11-28 23:55:59,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:55:59,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 110 [2023-11-28 23:55:59,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:55:59,801 INFO L124 PetriNetUnfolderBase]: 68/324 cut-off events. [2023-11-28 23:55:59,802 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2023-11-28 23:55:59,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 549 conditions, 324 events. 68/324 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1411 event pairs, 67 based on Foata normal form. 0/251 useless extension candidates. Maximal degree in co-relation 448. Up to 179 conditions per place. [2023-11-28 23:55:59,804 INFO L140 encePairwiseOnDemand]: 101/110 looper letters, 39 selfloop transitions, 6 changer transitions 0/96 dead transitions. [2023-11-28 23:55:59,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 96 transitions, 299 flow [2023-11-28 23:55:59,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 23:55:59,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-28 23:55:59,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 287 transitions. [2023-11-28 23:55:59,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6522727272727272 [2023-11-28 23:55:59,807 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 287 transitions. [2023-11-28 23:55:59,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 287 transitions. [2023-11-28 23:55:59,807 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:55:59,807 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 287 transitions. [2023-11-28 23:55:59,808 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 71.75) internal successors, (287), 4 states have internal predecessors, (287), 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) [2023-11-28 23:55:59,810 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 110.0) internal successors, (550), 5 states have internal predecessors, (550), 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) [2023-11-28 23:55:59,810 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 110.0) internal successors, (550), 5 states have internal predecessors, (550), 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) [2023-11-28 23:55:59,810 INFO L175 Difference]: Start difference. First operand has 95 places, 89 transitions, 195 flow. Second operand 4 states and 287 transitions. [2023-11-28 23:55:59,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 96 transitions, 299 flow [2023-11-28 23:55:59,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 96 transitions, 297 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-28 23:55:59,814 INFO L231 Difference]: Finished difference. Result has 99 places, 94 transitions, 241 flow [2023-11-28 23:55:59,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=241, PETRI_PLACES=99, PETRI_TRANSITIONS=94} [2023-11-28 23:55:59,815 INFO L281 CegarLoopForPetriNet]: 112 programPoint places, -13 predicate places. [2023-11-28 23:55:59,815 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 94 transitions, 241 flow [2023-11-28 23:55:59,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 60.8) internal successors, (304), 5 states have internal predecessors, (304), 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) [2023-11-28 23:55:59,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:55:59,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:55:59,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-28 23:55:59,817 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 73 more)] === [2023-11-28 23:55:59,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:55:59,817 INFO L85 PathProgramCache]: Analyzing trace with hash 2071487025, now seen corresponding path program 1 times [2023-11-28 23:55:59,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:55:59,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178328201] [2023-11-28 23:55:59,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:55:59,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:55:59,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:56:00,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:56:00,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:56:00,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178328201] [2023-11-28 23:56:00,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178328201] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:56:00,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:56:00,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-28 23:56:00,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742482473] [2023-11-28 23:56:00,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:56:00,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-28 23:56:00,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:56:00,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-28 23:56:00,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-28 23:56:00,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 110 [2023-11-28 23:56:00,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 94 transitions, 241 flow. Second operand has 7 states, 7 states have (on average 56.285714285714285) internal successors, (394), 7 states have internal predecessors, (394), 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) [2023-11-28 23:56:00,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:56:00,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 110 [2023-11-28 23:56:00,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:56:00,683 INFO L124 PetriNetUnfolderBase]: 67/316 cut-off events. [2023-11-28 23:56:00,683 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-11-28 23:56:00,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 568 conditions, 316 events. 67/316 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1372 event pairs, 66 based on Foata normal form. 0/255 useless extension candidates. Maximal degree in co-relation 523. Up to 167 conditions per place. [2023-11-28 23:56:00,686 INFO L140 encePairwiseOnDemand]: 93/110 looper letters, 31 selfloop transitions, 18 changer transitions 0/90 dead transitions. [2023-11-28 23:56:00,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 90 transitions, 331 flow [2023-11-28 23:56:00,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-28 23:56:00,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-28 23:56:00,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 487 transitions. [2023-11-28 23:56:00,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.553409090909091 [2023-11-28 23:56:00,689 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 487 transitions. [2023-11-28 23:56:00,690 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 487 transitions. [2023-11-28 23:56:00,690 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:56:00,690 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 487 transitions. [2023-11-28 23:56:00,692 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 60.875) internal successors, (487), 8 states have internal predecessors, (487), 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) [2023-11-28 23:56:00,695 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 110.0) internal successors, (990), 9 states have internal predecessors, (990), 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) [2023-11-28 23:56:00,696 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 110.0) internal successors, (990), 9 states have internal predecessors, (990), 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) [2023-11-28 23:56:00,696 INFO L175 Difference]: Start difference. First operand has 99 places, 94 transitions, 241 flow. Second operand 8 states and 487 transitions. [2023-11-28 23:56:00,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 90 transitions, 331 flow [2023-11-28 23:56:00,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 90 transitions, 329 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-28 23:56:00,701 INFO L231 Difference]: Finished difference. Result has 101 places, 90 transitions, 267 flow [2023-11-28 23:56:00,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=231, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=267, PETRI_PLACES=101, PETRI_TRANSITIONS=90} [2023-11-28 23:56:00,702 INFO L281 CegarLoopForPetriNet]: 112 programPoint places, -11 predicate places. [2023-11-28 23:56:00,702 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 90 transitions, 267 flow [2023-11-28 23:56:00,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 56.285714285714285) internal successors, (394), 7 states have internal predecessors, (394), 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) [2023-11-28 23:56:00,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:56:00,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:56:00,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-28 23:56:00,703 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 73 more)] === [2023-11-28 23:56:00,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:56:00,704 INFO L85 PathProgramCache]: Analyzing trace with hash 2071487026, now seen corresponding path program 1 times [2023-11-28 23:56:00,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:56:00,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112104755] [2023-11-28 23:56:00,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:56:00,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:56:00,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:56:01,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:56:01,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:56:01,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112104755] [2023-11-28 23:56:01,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112104755] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:56:01,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:56:01,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-28 23:56:01,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539284249] [2023-11-28 23:56:01,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:56:01,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-28 23:56:01,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:56:01,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-28 23:56:01,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-28 23:56:01,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 110 [2023-11-28 23:56:01,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 90 transitions, 267 flow. Second operand has 7 states, 7 states have (on average 51.285714285714285) internal successors, (359), 7 states have internal predecessors, (359), 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) [2023-11-28 23:56:01,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:56:01,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 110 [2023-11-28 23:56:01,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:56:01,835 INFO L124 PetriNetUnfolderBase]: 67/312 cut-off events. [2023-11-28 23:56:01,835 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2023-11-28 23:56:01,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 580 conditions, 312 events. 67/312 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1372 event pairs, 66 based on Foata normal form. 2/255 useless extension candidates. Maximal degree in co-relation 515. Up to 171 conditions per place. [2023-11-28 23:56:01,838 INFO L140 encePairwiseOnDemand]: 98/110 looper letters, 33 selfloop transitions, 15 changer transitions 0/88 dead transitions. [2023-11-28 23:56:01,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 88 transitions, 359 flow [2023-11-28 23:56:01,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-28 23:56:01,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-28 23:56:01,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 394 transitions. [2023-11-28 23:56:01,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5116883116883116 [2023-11-28 23:56:01,840 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 394 transitions. [2023-11-28 23:56:01,840 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 394 transitions. [2023-11-28 23:56:01,841 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:56:01,841 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 394 transitions. [2023-11-28 23:56:01,842 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 56.285714285714285) internal successors, (394), 7 states have internal predecessors, (394), 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) [2023-11-28 23:56:01,844 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 110.0) internal successors, (880), 8 states have internal predecessors, (880), 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) [2023-11-28 23:56:01,844 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 110.0) internal successors, (880), 8 states have internal predecessors, (880), 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) [2023-11-28 23:56:01,844 INFO L175 Difference]: Start difference. First operand has 101 places, 90 transitions, 267 flow. Second operand 7 states and 394 transitions. [2023-11-28 23:56:01,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 88 transitions, 359 flow [2023-11-28 23:56:01,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 88 transitions, 323 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-11-28 23:56:01,848 INFO L231 Difference]: Finished difference. Result has 98 places, 88 transitions, 257 flow [2023-11-28 23:56:01,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=257, PETRI_PLACES=98, PETRI_TRANSITIONS=88} [2023-11-28 23:56:01,849 INFO L281 CegarLoopForPetriNet]: 112 programPoint places, -14 predicate places. [2023-11-28 23:56:01,849 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 88 transitions, 257 flow [2023-11-28 23:56:01,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 51.285714285714285) internal successors, (359), 7 states have internal predecessors, (359), 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) [2023-11-28 23:56:01,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:56:01,850 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:56:01,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-28 23:56:01,850 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 73 more)] === [2023-11-28 23:56:01,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:56:01,851 INFO L85 PathProgramCache]: Analyzing trace with hash 2129192005, now seen corresponding path program 1 times [2023-11-28 23:56:01,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:56:01,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902747198] [2023-11-28 23:56:01,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:56:01,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:56:01,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:56:01,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:56:01,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:56:01,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902747198] [2023-11-28 23:56:01,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902747198] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:56:01,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:56:01,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-28 23:56:01,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801186201] [2023-11-28 23:56:01,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:56:01,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-28 23:56:01,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:56:01,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-28 23:56:01,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-28 23:56:02,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 110 [2023-11-28 23:56:02,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 88 transitions, 257 flow. Second operand has 5 states, 5 states have (on average 63.0) internal successors, (315), 5 states have internal predecessors, (315), 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) [2023-11-28 23:56:02,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:56:02,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 110 [2023-11-28 23:56:02,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:56:02,267 INFO L124 PetriNetUnfolderBase]: 67/310 cut-off events. [2023-11-28 23:56:02,267 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2023-11-28 23:56:02,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 573 conditions, 310 events. 67/310 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1363 event pairs, 66 based on Foata normal form. 2/252 useless extension candidates. Maximal degree in co-relation 509. Up to 171 conditions per place. [2023-11-28 23:56:02,270 INFO L140 encePairwiseOnDemand]: 99/110 looper letters, 31 selfloop transitions, 15 changer transitions 0/87 dead transitions. [2023-11-28 23:56:02,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 87 transitions, 347 flow [2023-11-28 23:56:02,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-28 23:56:02,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-28 23:56:02,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 346 transitions. [2023-11-28 23:56:02,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6290909090909091 [2023-11-28 23:56:02,272 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 346 transitions. [2023-11-28 23:56:02,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 346 transitions. [2023-11-28 23:56:02,273 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:56:02,273 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 346 transitions. [2023-11-28 23:56:02,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 69.2) internal successors, (346), 5 states have internal predecessors, (346), 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) [2023-11-28 23:56:02,276 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 110.0) internal successors, (660), 6 states have internal predecessors, (660), 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) [2023-11-28 23:56:02,277 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 110.0) internal successors, (660), 6 states have internal predecessors, (660), 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) [2023-11-28 23:56:02,277 INFO L175 Difference]: Start difference. First operand has 98 places, 88 transitions, 257 flow. Second operand 5 states and 346 transitions. [2023-11-28 23:56:02,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 87 transitions, 347 flow [2023-11-28 23:56:02,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 87 transitions, 317 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-28 23:56:02,280 INFO L231 Difference]: Finished difference. Result has 95 places, 87 transitions, 255 flow [2023-11-28 23:56:02,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=255, PETRI_PLACES=95, PETRI_TRANSITIONS=87} [2023-11-28 23:56:02,282 INFO L281 CegarLoopForPetriNet]: 112 programPoint places, -17 predicate places. [2023-11-28 23:56:02,282 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 87 transitions, 255 flow [2023-11-28 23:56:02,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 63.0) internal successors, (315), 5 states have internal predecessors, (315), 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) [2023-11-28 23:56:02,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:56:02,282 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:56:02,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-28 23:56:02,283 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 73 more)] === [2023-11-28 23:56:02,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:56:02,283 INFO L85 PathProgramCache]: Analyzing trace with hash 2129192006, now seen corresponding path program 1 times [2023-11-28 23:56:02,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:56:02,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937809428] [2023-11-28 23:56:02,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:56:02,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:56:02,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:56:02,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:56:02,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:56:02,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937809428] [2023-11-28 23:56:02,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937809428] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:56:02,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:56:02,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-28 23:56:02,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667188232] [2023-11-28 23:56:02,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:56:02,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-28 23:56:02,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:56:02,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-28 23:56:02,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-28 23:56:02,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 110 [2023-11-28 23:56:02,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 87 transitions, 255 flow. Second operand has 5 states, 5 states have (on average 66.6) internal successors, (333), 5 states have internal predecessors, (333), 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) [2023-11-28 23:56:02,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:56:02,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 110 [2023-11-28 23:56:02,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:56:02,807 INFO L124 PetriNetUnfolderBase]: 67/308 cut-off events. [2023-11-28 23:56:02,807 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2023-11-28 23:56:02,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 565 conditions, 308 events. 67/308 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1350 event pairs, 66 based on Foata normal form. 2/250 useless extension candidates. Maximal degree in co-relation 505. Up to 171 conditions per place. [2023-11-28 23:56:02,809 INFO L140 encePairwiseOnDemand]: 99/110 looper letters, 27 selfloop transitions, 15 changer transitions 0/86 dead transitions. [2023-11-28 23:56:02,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 86 transitions, 337 flow [2023-11-28 23:56:02,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-28 23:56:02,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-28 23:56:02,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 362 transitions. [2023-11-28 23:56:02,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6581818181818182 [2023-11-28 23:56:02,812 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 362 transitions. [2023-11-28 23:56:02,812 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 362 transitions. [2023-11-28 23:56:02,812 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:56:02,812 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 362 transitions. [2023-11-28 23:56:02,813 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) [2023-11-28 23:56:02,815 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 110.0) internal successors, (660), 6 states have internal predecessors, (660), 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) [2023-11-28 23:56:02,815 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 110.0) internal successors, (660), 6 states have internal predecessors, (660), 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) [2023-11-28 23:56:02,815 INFO L175 Difference]: Start difference. First operand has 95 places, 87 transitions, 255 flow. Second operand 5 states and 362 transitions. [2023-11-28 23:56:02,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 86 transitions, 337 flow [2023-11-28 23:56:02,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 86 transitions, 307 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-28 23:56:02,819 INFO L231 Difference]: Finished difference. Result has 94 places, 86 transitions, 253 flow [2023-11-28 23:56:02,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=253, PETRI_PLACES=94, PETRI_TRANSITIONS=86} [2023-11-28 23:56:02,820 INFO L281 CegarLoopForPetriNet]: 112 programPoint places, -18 predicate places. [2023-11-28 23:56:02,820 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 86 transitions, 253 flow [2023-11-28 23:56:02,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 66.6) internal successors, (333), 5 states have internal predecessors, (333), 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) [2023-11-28 23:56:02,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:56:02,821 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:56:02,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-28 23:56:02,821 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 73 more)] === [2023-11-28 23:56:02,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:56:02,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1554883250, now seen corresponding path program 1 times [2023-11-28 23:56:02,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:56:02,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321525099] [2023-11-28 23:56:02,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:56:02,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:56:02,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:56:03,218 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:56:03,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:56:03,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321525099] [2023-11-28 23:56:03,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321525099] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:56:03,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697451443] [2023-11-28 23:56:03,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:56:03,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:56:03,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4793a29-3835-47eb-ad86-573dc0cea74e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:56:03,225 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4793a29-3835-47eb-ad86-573dc0cea74e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:56:03,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4793a29-3835-47eb-ad86-573dc0cea74e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-28 23:56:03,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:56:03,388 INFO L262 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-28 23:56:03,394 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:56:03,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 23:56:03,492 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 [2023-11-28 23:56:03,564 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-28 23:56:03,564 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2023-11-28 23:56:03,594 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-28 23:56:03,594 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-28 23:56:03,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 23:56:03,750 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 [2023-11-28 23:56:03,791 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:56:03,791 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:56:04,022 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 23:56:04,023 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2023-11-28 23:56:04,204 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-28 23:56:04,204 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2023-11-28 23:56:04,420 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:56:04,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697451443] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:56:04,421 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:56:04,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 16 [2023-11-28 23:56:04,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276848089] [2023-11-28 23:56:04,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:56:04,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-28 23:56:04,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:56:04,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-28 23:56:04,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2023-11-28 23:56:07,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 110 [2023-11-28 23:56:07,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 86 transitions, 253 flow. Second operand has 18 states, 18 states have (on average 60.833333333333336) internal successors, (1095), 18 states have internal predecessors, (1095), 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) [2023-11-28 23:56:07,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:56:07,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 110 [2023-11-28 23:56:07,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:56:07,803 INFO L124 PetriNetUnfolderBase]: 79/365 cut-off events. [2023-11-28 23:56:07,804 INFO L125 PetriNetUnfolderBase]: For 58/58 co-relation queries the response was YES. [2023-11-28 23:56:07,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 695 conditions, 365 events. 79/365 cut-off events. For 58/58 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1654 event pairs, 76 based on Foata normal form. 6/304 useless extension candidates. Maximal degree in co-relation 559. Up to 194 conditions per place. [2023-11-28 23:56:07,806 INFO L140 encePairwiseOnDemand]: 101/110 looper letters, 48 selfloop transitions, 16 changer transitions 0/106 dead transitions. [2023-11-28 23:56:07,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 106 transitions, 485 flow [2023-11-28 23:56:07,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-28 23:56:07,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-28 23:56:07,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 601 transitions. [2023-11-28 23:56:07,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6070707070707071 [2023-11-28 23:56:07,810 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 601 transitions. [2023-11-28 23:56:07,810 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 601 transitions. [2023-11-28 23:56:07,810 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:56:07,811 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 601 transitions. [2023-11-28 23:56:07,812 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 66.77777777777777) internal successors, (601), 9 states have internal predecessors, (601), 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) [2023-11-28 23:56:07,815 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 110.0) internal successors, (1100), 10 states have internal predecessors, (1100), 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) [2023-11-28 23:56:07,815 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 110.0) internal successors, (1100), 10 states have internal predecessors, (1100), 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) [2023-11-28 23:56:07,816 INFO L175 Difference]: Start difference. First operand has 94 places, 86 transitions, 253 flow. Second operand 9 states and 601 transitions. [2023-11-28 23:56:07,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 106 transitions, 485 flow [2023-11-28 23:56:07,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 106 transitions, 419 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-28 23:56:07,820 INFO L231 Difference]: Finished difference. Result has 102 places, 94 transitions, 327 flow [2023-11-28 23:56:07,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=327, PETRI_PLACES=102, PETRI_TRANSITIONS=94} [2023-11-28 23:56:07,821 INFO L281 CegarLoopForPetriNet]: 112 programPoint places, -10 predicate places. [2023-11-28 23:56:07,821 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 94 transitions, 327 flow [2023-11-28 23:56:07,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 60.833333333333336) internal successors, (1095), 18 states have internal predecessors, (1095), 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) [2023-11-28 23:56:07,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:56:07,822 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-11-28 23:56:07,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4793a29-3835-47eb-ad86-573dc0cea74e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-28 23:56:08,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4793a29-3835-47eb-ad86-573dc0cea74e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-28 23:56:08,023 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 73 more)] === [2023-11-28 23:56:08,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:56:08,023 INFO L85 PathProgramCache]: Analyzing trace with hash 761422996, now seen corresponding path program 1 times [2023-11-28 23:56:08,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:56:08,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317799328] [2023-11-28 23:56:08,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:56:08,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:56:08,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:56:08,156 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:56:08,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:56:08,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317799328] [2023-11-28 23:56:08,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317799328] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:56:08,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883613238] [2023-11-28 23:56:08,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:56:08,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:56:08,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4793a29-3835-47eb-ad86-573dc0cea74e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:56:08,158 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4793a29-3835-47eb-ad86-573dc0cea74e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:56:08,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4793a29-3835-47eb-ad86-573dc0cea74e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-28 23:56:08,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:56:08,363 INFO L262 TraceCheckSpWp]: Trace formula consists of 502 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-28 23:56:08,366 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:56:08,404 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:56:08,404 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:56:08,450 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:56:08,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883613238] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:56:08,450 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:56:08,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-28 23:56:08,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370473590] [2023-11-28 23:56:08,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:56:08,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-28 23:56:08,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:56:08,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-28 23:56:08,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-11-28 23:56:08,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 110 [2023-11-28 23:56:08,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 94 transitions, 327 flow. Second operand has 8 states, 8 states have (on average 80.125) internal successors, (641), 8 states have internal predecessors, (641), 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) [2023-11-28 23:56:08,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:56:08,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 110 [2023-11-28 23:56:08,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:56:08,657 INFO L124 PetriNetUnfolderBase]: 67/349 cut-off events. [2023-11-28 23:56:08,657 INFO L125 PetriNetUnfolderBase]: For 115/115 co-relation queries the response was YES. [2023-11-28 23:56:08,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 695 conditions, 349 events. 67/349 cut-off events. For 115/115 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1315 event pairs, 66 based on Foata normal form. 4/293 useless extension candidates. Maximal degree in co-relation 576. Up to 167 conditions per place. [2023-11-28 23:56:08,659 INFO L140 encePairwiseOnDemand]: 106/110 looper letters, 63 selfloop transitions, 8 changer transitions 0/116 dead transitions. [2023-11-28 23:56:08,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 116 transitions, 565 flow [2023-11-28 23:56:08,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-28 23:56:08,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-28 23:56:08,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 682 transitions. [2023-11-28 23:56:08,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.775 [2023-11-28 23:56:08,662 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 682 transitions. [2023-11-28 23:56:08,662 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 682 transitions. [2023-11-28 23:56:08,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:56:08,663 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 682 transitions. [2023-11-28 23:56:08,665 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 85.25) internal successors, (682), 8 states have internal predecessors, (682), 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) [2023-11-28 23:56:08,667 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 110.0) internal successors, (990), 9 states have internal predecessors, (990), 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) [2023-11-28 23:56:08,667 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 110.0) internal successors, (990), 9 states have internal predecessors, (990), 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) [2023-11-28 23:56:08,667 INFO L175 Difference]: Start difference. First operand has 102 places, 94 transitions, 327 flow. Second operand 8 states and 682 transitions. [2023-11-28 23:56:08,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 116 transitions, 565 flow [2023-11-28 23:56:08,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 116 transitions, 545 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-11-28 23:56:08,671 INFO L231 Difference]: Finished difference. Result has 110 places, 95 transitions, 343 flow [2023-11-28 23:56:08,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=343, PETRI_PLACES=110, PETRI_TRANSITIONS=95} [2023-11-28 23:56:08,672 INFO L281 CegarLoopForPetriNet]: 112 programPoint places, -2 predicate places. [2023-11-28 23:56:08,673 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 95 transitions, 343 flow [2023-11-28 23:56:08,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 80.125) internal successors, (641), 8 states have internal predecessors, (641), 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) [2023-11-28 23:56:08,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:56:08,674 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1] [2023-11-28 23:56:08,679 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4793a29-3835-47eb-ad86-573dc0cea74e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-28 23:56:08,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4793a29-3835-47eb-ad86-573dc0cea74e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-28 23:56:08,874 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 73 more)] === [2023-11-28 23:56:08,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:56:08,875 INFO L85 PathProgramCache]: Analyzing trace with hash -344765178, now seen corresponding path program 2 times [2023-11-28 23:56:08,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:56:08,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311109445] [2023-11-28 23:56:08,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:56:08,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:56:09,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:56:11,022 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:56:11,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:56:11,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311109445] [2023-11-28 23:56:11,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311109445] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:56:11,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236653572] [2023-11-28 23:56:11,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 23:56:11,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:56:11,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4793a29-3835-47eb-ad86-573dc0cea74e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:56:11,025 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4793a29-3835-47eb-ad86-573dc0cea74e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:56:11,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4793a29-3835-47eb-ad86-573dc0cea74e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-28 23:56:11,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 23:56:11,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 23:56:11,371 INFO L262 TraceCheckSpWp]: Trace formula consists of 888 conjuncts, 77 conjunts are in the unsatisfiable core [2023-11-28 23:56:11,377 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:56:11,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 23:56:11,424 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 [2023-11-28 23:56:11,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 23:56:11,477 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 [2023-11-28 23:56:11,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 23:56:11,571 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 [2023-11-28 23:56:11,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 23:56:11,622 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 [2023-11-28 23:56:11,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 23:56:11,718 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 [2023-11-28 23:56:11,772 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-28 23:56:11,773 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2023-11-28 23:56:11,787 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-28 23:56:11,787 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-28 23:56:11,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 23:56:11,928 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 [2023-11-28 23:56:12,007 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-28 23:56:12,007 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2023-11-28 23:56:12,026 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-28 23:56:12,026 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-28 23:56:12,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 23:56:12,188 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 [2023-11-28 23:56:12,238 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:56:12,238 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:56:12,480 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 23:56:12,480 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2023-11-28 23:56:12,594 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-28 23:56:12,594 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2023-11-28 23:56:12,956 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 23:56:12,956 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2023-11-28 23:56:13,121 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-28 23:56:13,122 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2023-11-28 23:56:13,509 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 23:56:13,510 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2023-11-28 23:56:13,627 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-28 23:56:13,627 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2023-11-28 23:56:14,046 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 23:56:14,046 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2023-11-28 23:56:14,181 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-28 23:56:14,181 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2023-11-28 23:56:14,591 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:56:14,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236653572] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:56:14,592 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:56:14,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 10] total 41 [2023-11-28 23:56:14,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574158116] [2023-11-28 23:56:14,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:56:14,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-11-28 23:56:14,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:56:14,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-11-28 23:56:14,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=1528, Unknown=0, NotChecked=0, Total=1806 [2023-11-28 23:56:31,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 110 [2023-11-28 23:56:31,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 95 transitions, 343 flow. Second operand has 43 states, 43 states have (on average 61.23255813953488) internal successors, (2633), 43 states have internal predecessors, (2633), 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) [2023-11-28 23:56:31,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:56:31,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 110 [2023-11-28 23:56:31,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:56:33,355 INFO L124 PetriNetUnfolderBase]: 81/427 cut-off events. [2023-11-28 23:56:33,355 INFO L125 PetriNetUnfolderBase]: For 272/272 co-relation queries the response was YES. [2023-11-28 23:56:33,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 924 conditions, 427 events. 81/427 cut-off events. For 272/272 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1735 event pairs, 76 based on Foata normal form. 6/369 useless extension candidates. Maximal degree in co-relation 810. Up to 196 conditions per place. [2023-11-28 23:56:33,358 INFO L140 encePairwiseOnDemand]: 102/110 looper letters, 80 selfloop transitions, 28 changer transitions 0/150 dead transitions. [2023-11-28 23:56:33,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 150 transitions, 893 flow [2023-11-28 23:56:33,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-28 23:56:33,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-28 23:56:33,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1116 transitions. [2023-11-28 23:56:33,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5967914438502674 [2023-11-28 23:56:33,362 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1116 transitions. [2023-11-28 23:56:33,362 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1116 transitions. [2023-11-28 23:56:33,363 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:56:33,364 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1116 transitions. [2023-11-28 23:56:33,367 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 65.6470588235294) internal successors, (1116), 17 states have internal predecessors, (1116), 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) [2023-11-28 23:56:33,370 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 110.0) internal successors, (1980), 18 states have internal predecessors, (1980), 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) [2023-11-28 23:56:33,370 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 110.0) internal successors, (1980), 18 states have internal predecessors, (1980), 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) [2023-11-28 23:56:33,370 INFO L175 Difference]: Start difference. First operand has 110 places, 95 transitions, 343 flow. Second operand 17 states and 1116 transitions. [2023-11-28 23:56:33,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 150 transitions, 893 flow [2023-11-28 23:56:33,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 150 transitions, 877 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-11-28 23:56:33,376 INFO L231 Difference]: Finished difference. Result has 134 places, 111 transitions, 603 flow [2023-11-28 23:56:33,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=335, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=603, PETRI_PLACES=134, PETRI_TRANSITIONS=111} [2023-11-28 23:56:33,377 INFO L281 CegarLoopForPetriNet]: 112 programPoint places, 22 predicate places. [2023-11-28 23:56:33,377 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 111 transitions, 603 flow [2023-11-28 23:56:33,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 61.23255813953488) internal successors, (2633), 43 states have internal predecessors, (2633), 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) [2023-11-28 23:56:33,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:56:33,378 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1] [2023-11-28 23:56:33,385 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4793a29-3835-47eb-ad86-573dc0cea74e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-28 23:56:33,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4793a29-3835-47eb-ad86-573dc0cea74e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-28 23:56:33,578 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 73 more)] === [2023-11-28 23:56:33,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:56:33,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1123357948, now seen corresponding path program 2 times [2023-11-28 23:56:33,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:56:33,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64713251] [2023-11-28 23:56:33,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:56:33,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:56:33,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:56:33,948 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:56:33,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:56:33,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64713251] [2023-11-28 23:56:33,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64713251] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:56:33,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466417502] [2023-11-28 23:56:33,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 23:56:33,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:56:33,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4793a29-3835-47eb-ad86-573dc0cea74e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:56:33,950 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4793a29-3835-47eb-ad86-573dc0cea74e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:56:33,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4793a29-3835-47eb-ad86-573dc0cea74e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-28 23:56:34,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 23:56:34,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 23:56:34,373 INFO L262 TraceCheckSpWp]: Trace formula consists of 1298 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-28 23:56:34,378 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:56:34,455 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:56:34,455 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:56:34,578 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:56:34,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466417502] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:56:34,578 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:56:34,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2023-11-28 23:56:34,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486050770] [2023-11-28 23:56:34,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:56:34,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-28 23:56:34,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:56:34,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-28 23:56:34,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-28 23:56:34,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 110 [2023-11-28 23:56:34,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 111 transitions, 603 flow. Second operand has 13 states, 13 states have (on average 81.84615384615384) internal successors, (1064), 13 states have internal predecessors, (1064), 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) [2023-11-28 23:56:34,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:56:34,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 110 [2023-11-28 23:56:34,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:56:34,921 INFO L124 PetriNetUnfolderBase]: 67/391 cut-off events. [2023-11-28 23:56:34,921 INFO L125 PetriNetUnfolderBase]: For 533/533 co-relation queries the response was YES. [2023-11-28 23:56:34,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 929 conditions, 391 events. 67/391 cut-off events. For 533/533 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1324 event pairs, 66 based on Foata normal form. 4/335 useless extension candidates. Maximal degree in co-relation 785. Up to 167 conditions per place. [2023-11-28 23:56:34,923 INFO L140 encePairwiseOnDemand]: 106/110 looper letters, 88 selfloop transitions, 12 changer transitions 0/145 dead transitions. [2023-11-28 23:56:34,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 145 transitions, 977 flow [2023-11-28 23:56:34,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-28 23:56:34,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-28 23:56:34,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1014 transitions. [2023-11-28 23:56:34,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7681818181818182 [2023-11-28 23:56:34,927 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1014 transitions. [2023-11-28 23:56:34,927 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1014 transitions. [2023-11-28 23:56:34,927 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:56:34,927 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1014 transitions. [2023-11-28 23:56:34,929 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 84.5) internal successors, (1014), 12 states have internal predecessors, (1014), 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) [2023-11-28 23:56:34,931 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 110.0) internal successors, (1430), 13 states have internal predecessors, (1430), 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) [2023-11-28 23:56:34,932 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 110.0) internal successors, (1430), 13 states have internal predecessors, (1430), 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) [2023-11-28 23:56:34,932 INFO L175 Difference]: Start difference. First operand has 134 places, 111 transitions, 603 flow. Second operand 12 states and 1014 transitions. [2023-11-28 23:56:34,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 145 transitions, 977 flow [2023-11-28 23:56:34,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 145 transitions, 894 flow, removed 24 selfloop flow, removed 8 redundant places. [2023-11-28 23:56:34,939 INFO L231 Difference]: Finished difference. Result has 138 places, 108 transitions, 506 flow [2023-11-28 23:56:34,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=469, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=506, PETRI_PLACES=138, PETRI_TRANSITIONS=108} [2023-11-28 23:56:34,939 INFO L281 CegarLoopForPetriNet]: 112 programPoint places, 26 predicate places. [2023-11-28 23:56:34,940 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 108 transitions, 506 flow [2023-11-28 23:56:34,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 81.84615384615384) internal successors, (1064), 13 states have internal predecessors, (1064), 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) [2023-11-28 23:56:34,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:56:34,940 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 1, 1] [2023-11-28 23:56:34,947 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4793a29-3835-47eb-ad86-573dc0cea74e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-28 23:56:35,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4793a29-3835-47eb-ad86-573dc0cea74e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-28 23:56:35,141 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 73 more)] === [2023-11-28 23:56:35,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:56:35,141 INFO L85 PathProgramCache]: Analyzing trace with hash -515342162, now seen corresponding path program 3 times [2023-11-28 23:56:35,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:56:35,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107296662] [2023-11-28 23:56:35,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:56:35,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:56:35,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:56:35,937 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 490 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:56:35,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:56:35,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107296662] [2023-11-28 23:56:35,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107296662] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:56:35,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:56:35,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-11-28 23:56:35,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053662654] [2023-11-28 23:56:35,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:56:35,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-28 23:56:35,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:56:35,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-28 23:56:35,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-28 23:56:35,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 110 [2023-11-28 23:56:35,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 108 transitions, 506 flow. Second operand has 13 states, 13 states have (on average 81.61538461538461) internal successors, (1061), 13 states have internal predecessors, (1061), 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) [2023-11-28 23:56:35,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:56:35,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 110 [2023-11-28 23:56:35,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:56:36,327 INFO L124 PetriNetUnfolderBase]: 66/386 cut-off events. [2023-11-28 23:56:36,327 INFO L125 PetriNetUnfolderBase]: For 404/404 co-relation queries the response was YES. [2023-11-28 23:56:36,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 874 conditions, 386 events. 66/386 cut-off events. For 404/404 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1305 event pairs, 66 based on Foata normal form. 1/327 useless extension candidates. Maximal degree in co-relation 756. Up to 166 conditions per place. [2023-11-28 23:56:36,331 INFO L140 encePairwiseOnDemand]: 106/110 looper letters, 86 selfloop transitions, 12 changer transitions 0/142 dead transitions. [2023-11-28 23:56:36,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 142 transitions, 881 flow [2023-11-28 23:56:36,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-28 23:56:36,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-28 23:56:36,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1086 transitions. [2023-11-28 23:56:36,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7594405594405594 [2023-11-28 23:56:36,335 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1086 transitions. [2023-11-28 23:56:36,335 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1086 transitions. [2023-11-28 23:56:36,336 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:56:36,336 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1086 transitions. [2023-11-28 23:56:36,339 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 83.53846153846153) internal successors, (1086), 13 states have internal predecessors, (1086), 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) [2023-11-28 23:56:36,342 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 110.0) internal successors, (1540), 14 states have internal predecessors, (1540), 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) [2023-11-28 23:56:36,343 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 110.0) internal successors, (1540), 14 states have internal predecessors, (1540), 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) [2023-11-28 23:56:36,343 INFO L175 Difference]: Start difference. First operand has 138 places, 108 transitions, 506 flow. Second operand 13 states and 1086 transitions. [2023-11-28 23:56:36,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 142 transitions, 881 flow [2023-11-28 23:56:36,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 142 transitions, 801 flow, removed 14 selfloop flow, removed 20 redundant places. [2023-11-28 23:56:36,350 INFO L231 Difference]: Finished difference. Result has 129 places, 105 transitions, 421 flow [2023-11-28 23:56:36,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=397, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=421, PETRI_PLACES=129, PETRI_TRANSITIONS=105} [2023-11-28 23:56:36,351 INFO L281 CegarLoopForPetriNet]: 112 programPoint places, 17 predicate places. [2023-11-28 23:56:36,351 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 105 transitions, 421 flow [2023-11-28 23:56:36,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 81.61538461538461) internal successors, (1061), 13 states have internal predecessors, (1061), 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) [2023-11-28 23:56:36,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:56:36,352 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1] [2023-11-28 23:56:36,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-28 23:56:36,353 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 73 more)] === [2023-11-28 23:56:36,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:56:36,353 INFO L85 PathProgramCache]: Analyzing trace with hash -515358348, now seen corresponding path program 3 times [2023-11-28 23:56:36,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:56:36,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558864871] [2023-11-28 23:56:36,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:56:36,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:56:36,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:56:38,166 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 336 proven. 124 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:56:38,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:56:38,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558864871] [2023-11-28 23:56:38,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558864871] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:56:38,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741179134] [2023-11-28 23:56:38,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-28 23:56:38,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:56:38,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4793a29-3835-47eb-ad86-573dc0cea74e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:56:38,168 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4793a29-3835-47eb-ad86-573dc0cea74e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:56:38,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4793a29-3835-47eb-ad86-573dc0cea74e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-28 23:56:38,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-28 23:56:38,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 23:56:38,603 INFO L262 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-28 23:56:38,611 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:56:38,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 23:56:38,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 23:56:38,803 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2023-11-28 23:56:38,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 23:56:38,825 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-11-28 23:56:38,825 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2023-11-28 23:56:38,865 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 423 trivial. 0 not checked. [2023-11-28 23:56:38,866 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 23:56:38,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741179134] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:56:38,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-28 23:56:38,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [12] total 16 [2023-11-28 23:56:38,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705930901] [2023-11-28 23:56:38,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:56:38,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-28 23:56:38,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:56:38,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-28 23:56:38,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2023-11-28 23:56:39,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 110 [2023-11-28 23:56:39,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 105 transitions, 421 flow. Second operand has 6 states, 6 states have (on average 70.33333333333333) internal successors, (422), 6 states have internal predecessors, (422), 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) [2023-11-28 23:56:39,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:56:39,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 110 [2023-11-28 23:56:39,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:56:39,405 INFO L124 PetriNetUnfolderBase]: 76/417 cut-off events. [2023-11-28 23:56:39,405 INFO L125 PetriNetUnfolderBase]: For 293/293 co-relation queries the response was YES. [2023-11-28 23:56:39,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 893 conditions, 417 events. 76/417 cut-off events. For 293/293 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1565 event pairs, 76 based on Foata normal form. 0/351 useless extension candidates. Maximal degree in co-relation 714. Up to 183 conditions per place. [2023-11-28 23:56:39,408 INFO L140 encePairwiseOnDemand]: 104/110 looper letters, 46 selfloop transitions, 17 changer transitions 0/104 dead transitions. [2023-11-28 23:56:39,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 104 transitions, 545 flow [2023-11-28 23:56:39,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-28 23:56:39,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-28 23:56:39,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 448 transitions. [2023-11-28 23:56:39,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6787878787878788 [2023-11-28 23:56:39,410 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 448 transitions. [2023-11-28 23:56:39,410 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 448 transitions. [2023-11-28 23:56:39,411 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:56:39,411 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 448 transitions. [2023-11-28 23:56:39,412 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 74.66666666666667) internal successors, (448), 6 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) [2023-11-28 23:56:39,414 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 110.0) internal successors, (770), 7 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:56:39,414 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 110.0) internal successors, (770), 7 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:56:39,414 INFO L175 Difference]: Start difference. First operand has 129 places, 105 transitions, 421 flow. Second operand 6 states and 448 transitions. [2023-11-28 23:56:39,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 104 transitions, 545 flow [2023-11-28 23:56:39,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 104 transitions, 510 flow, removed 2 selfloop flow, removed 13 redundant places. [2023-11-28 23:56:39,420 INFO L231 Difference]: Finished difference. Result has 120 places, 104 transitions, 418 flow [2023-11-28 23:56:39,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=418, PETRI_PLACES=120, PETRI_TRANSITIONS=104} [2023-11-28 23:56:39,420 INFO L281 CegarLoopForPetriNet]: 112 programPoint places, 8 predicate places. [2023-11-28 23:56:39,421 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 104 transitions, 418 flow [2023-11-28 23:56:39,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 70.33333333333333) internal successors, (422), 6 states have internal predecessors, (422), 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) [2023-11-28 23:56:39,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:56:39,421 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2023-11-28 23:56:39,427 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4793a29-3835-47eb-ad86-573dc0cea74e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-28 23:56:39,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4793a29-3835-47eb-ad86-573dc0cea74e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-28 23:56:39,622 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 73 more)] === [2023-11-28 23:56:39,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:56:39,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1203761023, now seen corresponding path program 1 times [2023-11-28 23:56:39,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:56:39,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194868178] [2023-11-28 23:56:39,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:56:39,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:56:40,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat