./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version cf1a7837 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_dcf2c42b-01b6-4659-aa2a-d27a41a793d0/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcf2c42b-01b6-4659-aa2a-d27a41a793d0/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcf2c42b-01b6-4659-aa2a-d27a41a793d0/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcf2c42b-01b6-4659-aa2a-d27a41a793d0/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcf2c42b-01b6-4659-aa2a-d27a41a793d0/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcf2c42b-01b6-4659-aa2a-d27a41a793d0/bin/uautomizer-verify-uTZkv6EMXl --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 db5eab03de8fef3e653289c5dcf0b220be6d8b09a4df3c07d6d5a066426e755a --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:33:12,173 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:33:12,266 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcf2c42b-01b6-4659-aa2a-d27a41a793d0/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-12 02:33:12,272 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:33:12,272 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:33:12,294 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:33:12,295 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:33:12,296 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:33:12,297 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:33:12,297 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:33:12,298 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:33:12,299 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:33:12,299 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:33:12,300 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:33:12,300 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:33:12,301 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:33:12,301 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:33:12,302 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:33:12,302 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-12 02:33:12,303 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-12 02:33:12,303 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-12 02:33:12,304 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:33:12,304 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-12 02:33:12,305 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-12 02:33:12,305 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:33:12,306 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:33:12,306 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:33:12,307 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:33:12,307 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:33:12,308 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:33:12,308 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:33:12,309 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:33:12,309 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:33:12,309 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:33:12,310 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:33:12,310 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:33:12,310 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:33:12,311 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:33:12,311 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_dcf2c42b-01b6-4659-aa2a-d27a41a793d0/bin/uautomizer-verify-uTZkv6EMXl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcf2c42b-01b6-4659-aa2a-d27a41a793d0/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> db5eab03de8fef3e653289c5dcf0b220be6d8b09a4df3c07d6d5a066426e755a [2023-11-12 02:33:12,538 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:33:12,559 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:33:12,561 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:33:12,563 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:33:12,563 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:33:12,565 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcf2c42b-01b6-4659-aa2a-d27a41a793d0/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing.i [2023-11-12 02:33:15,656 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:33:16,046 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:33:16,047 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcf2c42b-01b6-4659-aa2a-d27a41a793d0/sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing.i [2023-11-12 02:33:16,068 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcf2c42b-01b6-4659-aa2a-d27a41a793d0/bin/uautomizer-verify-uTZkv6EMXl/data/de99018ab/fac698fd1e574bf6850e9b2bf2df2caa/FLAG2c847d3bd [2023-11-12 02:33:16,085 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcf2c42b-01b6-4659-aa2a-d27a41a793d0/bin/uautomizer-verify-uTZkv6EMXl/data/de99018ab/fac698fd1e574bf6850e9b2bf2df2caa [2023-11-12 02:33:16,088 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:33:16,090 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:33:16,091 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:33:16,092 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:33:16,098 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:33:16,099 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:33:16" (1/1) ... [2023-11-12 02:33:16,100 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f7de686 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:33:16, skipping insertion in model container [2023-11-12 02:33:16,100 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:33:16" (1/1) ... [2023-11-12 02:33:16,170 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:33:16,888 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:33:16,993 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:33:17,040 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:33:17,118 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:33:17,119 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:33:17 WrapperNode [2023-11-12 02:33:17,119 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:33:17,121 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:33:17,122 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:33:17,122 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:33:17,130 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:33:17" (1/1) ... [2023-11-12 02:33:17,172 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:33:17" (1/1) ... [2023-11-12 02:33:17,232 INFO L138 Inliner]: procedures = 278, calls = 61, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 239 [2023-11-12 02:33:17,234 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:33:17,235 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:33:17,235 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:33:17,235 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:33:17,245 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:33:17" (1/1) ... [2023-11-12 02:33:17,247 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:33:17" (1/1) ... [2023-11-12 02:33:17,269 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:33:17" (1/1) ... [2023-11-12 02:33:17,270 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:33:17" (1/1) ... [2023-11-12 02:33:17,286 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:33:17" (1/1) ... [2023-11-12 02:33:17,304 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:33:17" (1/1) ... [2023-11-12 02:33:17,338 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:33:17" (1/1) ... [2023-11-12 02:33:17,340 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:33:17" (1/1) ... [2023-11-12 02:33:17,345 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:33:17,346 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:33:17,346 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:33:17,346 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:33:17,347 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:33:17" (1/1) ... [2023-11-12 02:33:17,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:33:17,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcf2c42b-01b6-4659-aa2a-d27a41a793d0/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:33:17,379 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcf2c42b-01b6-4659-aa2a-d27a41a793d0/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:33:17,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcf2c42b-01b6-4659-aa2a-d27a41a793d0/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:33:17,430 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 02:33:17,430 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-12 02:33:17,430 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2023-11-12 02:33:17,432 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2023-11-12 02:33:17,432 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:33:17,432 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 02:33:17,433 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2023-11-12 02:33:17,433 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2023-11-12 02:33:17,433 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:33:17,434 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-12 02:33:17,434 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 02:33:17,434 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:33:17,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-12 02:33:17,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:33:17,435 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:33:17,435 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:33:17,437 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-12 02:33:17,605 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:33:17,608 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:33:18,226 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:33:18,238 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:33:18,239 INFO L302 CfgBuilder]: Removed 16 assume(true) statements. [2023-11-12 02:33:18,242 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:33:18 BoogieIcfgContainer [2023-11-12 02:33:18,247 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:33:18,250 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:33:18,258 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:33:18,261 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:33:18,262 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:33:16" (1/3) ... [2023-11-12 02:33:18,262 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e93667d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:33:18, skipping insertion in model container [2023-11-12 02:33:18,263 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:33:17" (2/3) ... [2023-11-12 02:33:18,269 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e93667d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:33:18, skipping insertion in model container [2023-11-12 02:33:18,269 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:33:18" (3/3) ... [2023-11-12 02:33:18,271 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_86-lists_racing.i [2023-11-12 02:33:18,297 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:33:18,297 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 44 error locations. [2023-11-12 02:33:18,298 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-12 02:33:18,478 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-12 02:33:18,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 277 places, 298 transitions, 616 flow [2023-11-12 02:33:18,769 INFO L124 PetriNetUnfolderBase]: 56/567 cut-off events. [2023-11-12 02:33:18,769 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-11-12 02:33:18,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 584 conditions, 567 events. 56/567 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2653 event pairs, 0 based on Foata normal form. 0/419 useless extension candidates. Maximal degree in co-relation 284. Up to 8 conditions per place. [2023-11-12 02:33:18,789 INFO L82 GeneralOperation]: Start removeDead. Operand has 277 places, 298 transitions, 616 flow [2023-11-12 02:33:18,807 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 277 places, 298 transitions, 616 flow [2023-11-12 02:33:18,814 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:33:18,825 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 277 places, 298 transitions, 616 flow [2023-11-12 02:33:18,828 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 277 places, 298 transitions, 616 flow [2023-11-12 02:33:18,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 277 places, 298 transitions, 616 flow [2023-11-12 02:33:18,934 INFO L124 PetriNetUnfolderBase]: 56/567 cut-off events. [2023-11-12 02:33:18,934 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-11-12 02:33:18,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 584 conditions, 567 events. 56/567 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2653 event pairs, 0 based on Foata normal form. 0/419 useless extension candidates. Maximal degree in co-relation 284. Up to 8 conditions per place. [2023-11-12 02:33:18,969 INFO L119 LiptonReduction]: Number of co-enabled transitions 30162 [2023-11-12 02:33:31,726 INFO L134 LiptonReduction]: Checked pairs total: 76105 [2023-11-12 02:33:31,728 INFO L136 LiptonReduction]: Total number of compositions: 280 [2023-11-12 02:33:31,761 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:33:31,769 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;@3ef50f51, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:33:31,770 INFO L358 AbstractCegarLoop]: Starting to check reachability of 75 error locations. [2023-11-12 02:33:31,774 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:33:31,774 INFO L124 PetriNetUnfolderBase]: 1/3 cut-off events. [2023-11-12 02:33:31,775 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:33:31,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:33:31,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-12 02:33:31,776 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2023-11-12 02:33:31,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:33:31,783 INFO L85 PathProgramCache]: Analyzing trace with hash 37837, now seen corresponding path program 1 times [2023-11-12 02:33:31,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:33:31,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663508096] [2023-11-12 02:33:31,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:31,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:33:31,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:33:32,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:33:32,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:33:32,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663508096] [2023-11-12 02:33:32,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663508096] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:33:32,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:33:32,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:33:32,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132838791] [2023-11-12 02:33:32,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:33:32,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 02:33:32,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:33:32,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 02:33:32,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 02:33:32,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 273 out of 578 [2023-11-12 02:33:32,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 116 transitions, 252 flow. Second operand has 2 states, 2 states have (on average 274.0) internal successors, (548), 2 states have internal predecessors, (548), 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) [2023-11-12 02:33:32,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:33:32,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 273 of 578 [2023-11-12 02:33:32,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:33:36,569 INFO L124 PetriNetUnfolderBase]: 17637/30439 cut-off events. [2023-11-12 02:33:36,569 INFO L125 PetriNetUnfolderBase]: For 158/158 co-relation queries the response was YES. [2023-11-12 02:33:36,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57564 conditions, 30439 events. 17637/30439 cut-off events. For 158/158 co-relation queries the response was YES. Maximal size of possible extension queue 1076. Compared 246917 event pairs, 16922 based on Foata normal form. 1181/15498 useless extension candidates. Maximal degree in co-relation 54865. Up to 26986 conditions per place. [2023-11-12 02:33:36,790 INFO L140 encePairwiseOnDemand]: 562/578 looper letters, 80 selfloop transitions, 0 changer transitions 0/99 dead transitions. [2023-11-12 02:33:36,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 99 transitions, 378 flow [2023-11-12 02:33:36,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 02:33:36,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-12 02:33:36,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 642 transitions. [2023-11-12 02:33:36,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5553633217993079 [2023-11-12 02:33:36,816 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 642 transitions. [2023-11-12 02:33:36,816 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 642 transitions. [2023-11-12 02:33:36,821 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:33:36,824 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 642 transitions. [2023-11-12 02:33:36,830 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 321.0) internal successors, (642), 2 states have internal predecessors, (642), 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) [2023-11-12 02:33:36,840 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 578.0) internal successors, (1734), 3 states have internal predecessors, (1734), 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) [2023-11-12 02:33:36,841 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 578.0) internal successors, (1734), 3 states have internal predecessors, (1734), 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) [2023-11-12 02:33:36,843 INFO L175 Difference]: Start difference. First operand has 102 places, 116 transitions, 252 flow. Second operand 2 states and 642 transitions. [2023-11-12 02:33:36,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 99 transitions, 378 flow [2023-11-12 02:33:36,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 99 transitions, 378 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-12 02:33:36,863 INFO L231 Difference]: Finished difference. Result has 98 places, 99 transitions, 218 flow [2023-11-12 02:33:36,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=578, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=218, PETRI_PLACES=98, PETRI_TRANSITIONS=99} [2023-11-12 02:33:36,870 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, -4 predicate places. [2023-11-12 02:33:36,871 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 99 transitions, 218 flow [2023-11-12 02:33:36,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 274.0) internal successors, (548), 2 states have internal predecessors, (548), 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) [2023-11-12 02:33:36,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:33:36,872 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-12 02:33:36,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:33:36,873 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2023-11-12 02:33:36,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:33:36,873 INFO L85 PathProgramCache]: Analyzing trace with hash 37856, now seen corresponding path program 1 times [2023-11-12 02:33:36,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:33:36,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733162130] [2023-11-12 02:33:36,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:36,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:33:36,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:33:37,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:33:37,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:33:37,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733162130] [2023-11-12 02:33:37,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733162130] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:33:37,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:33:37,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:33:37,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770265536] [2023-11-12 02:33:37,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:33:37,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:33:37,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:33:37,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:33:37,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:33:37,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 268 out of 578 [2023-11-12 02:33:37,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 99 transitions, 218 flow. Second operand has 3 states, 3 states have (on average 268.6666666666667) internal successors, (806), 3 states have internal predecessors, (806), 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) [2023-11-12 02:33:37,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:33:37,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 268 of 578 [2023-11-12 02:33:37,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:33:40,978 INFO L124 PetriNetUnfolderBase]: 17366/29238 cut-off events. [2023-11-12 02:33:40,978 INFO L125 PetriNetUnfolderBase]: For 153/153 co-relation queries the response was YES. [2023-11-12 02:33:41,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56097 conditions, 29238 events. 17366/29238 cut-off events. For 153/153 co-relation queries the response was YES. Maximal size of possible extension queue 1070. Compared 231772 event pairs, 11890 based on Foata normal form. 0/14379 useless extension candidates. Maximal degree in co-relation 56092. Up to 18802 conditions per place. [2023-11-12 02:33:41,298 INFO L140 encePairwiseOnDemand]: 573/578 looper letters, 122 selfloop transitions, 2 changer transitions 0/142 dead transitions. [2023-11-12 02:33:41,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 142 transitions, 552 flow [2023-11-12 02:33:41,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:33:41,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:33:41,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 931 transitions. [2023-11-12 02:33:41,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5369088811995386 [2023-11-12 02:33:41,304 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 931 transitions. [2023-11-12 02:33:41,305 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 931 transitions. [2023-11-12 02:33:41,305 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:33:41,306 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 931 transitions. [2023-11-12 02:33:41,309 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 310.3333333333333) internal successors, (931), 3 states have internal predecessors, (931), 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) [2023-11-12 02:33:41,314 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 578.0) internal successors, (2312), 4 states have internal predecessors, (2312), 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) [2023-11-12 02:33:41,316 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 578.0) internal successors, (2312), 4 states have internal predecessors, (2312), 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) [2023-11-12 02:33:41,317 INFO L175 Difference]: Start difference. First operand has 98 places, 99 transitions, 218 flow. Second operand 3 states and 931 transitions. [2023-11-12 02:33:41,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 142 transitions, 552 flow [2023-11-12 02:33:41,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 142 transitions, 552 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-12 02:33:41,333 INFO L231 Difference]: Finished difference. Result has 100 places, 98 transitions, 226 flow [2023-11-12 02:33:41,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=578, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=226, PETRI_PLACES=100, PETRI_TRANSITIONS=98} [2023-11-12 02:33:41,336 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, -2 predicate places. [2023-11-12 02:33:41,340 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 98 transitions, 226 flow [2023-11-12 02:33:41,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 268.6666666666667) internal successors, (806), 3 states have internal predecessors, (806), 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) [2023-11-12 02:33:41,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:33:41,342 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-12 02:33:41,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 02:33:41,348 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2023-11-12 02:33:41,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:33:41,348 INFO L85 PathProgramCache]: Analyzing trace with hash 37855, now seen corresponding path program 1 times [2023-11-12 02:33:41,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:33:41,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995327237] [2023-11-12 02:33:41,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:41,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:33:41,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:33:41,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:33:41,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:33:41,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995327237] [2023-11-12 02:33:41,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995327237] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:33:41,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:33:41,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:33:41,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846125946] [2023-11-12 02:33:41,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:33:41,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:33:41,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:33:41,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:33:41,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:33:41,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 262 out of 578 [2023-11-12 02:33:41,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 98 transitions, 226 flow. Second operand has 3 states, 3 states have (on average 262.6666666666667) internal successors, (788), 3 states have internal predecessors, (788), 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) [2023-11-12 02:33:41,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:33:41,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 262 of 578 [2023-11-12 02:33:41,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:33:45,132 INFO L124 PetriNetUnfolderBase]: 17456/30114 cut-off events. [2023-11-12 02:33:45,132 INFO L125 PetriNetUnfolderBase]: For 874/874 co-relation queries the response was YES. [2023-11-12 02:33:45,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58242 conditions, 30114 events. 17456/30114 cut-off events. For 874/874 co-relation queries the response was YES. Maximal size of possible extension queue 1030. Compared 239767 event pairs, 16735 based on Foata normal form. 0/15602 useless extension candidates. Maximal degree in co-relation 58235. Up to 26725 conditions per place. [2023-11-12 02:33:45,287 INFO L140 encePairwiseOnDemand]: 574/578 looper letters, 79 selfloop transitions, 2 changer transitions 0/99 dead transitions. [2023-11-12 02:33:45,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 99 transitions, 390 flow [2023-11-12 02:33:45,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:33:45,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:33:45,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 869 transitions. [2023-11-12 02:33:45,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5011534025374856 [2023-11-12 02:33:45,298 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 869 transitions. [2023-11-12 02:33:45,299 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 869 transitions. [2023-11-12 02:33:45,300 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:33:45,300 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 869 transitions. [2023-11-12 02:33:45,309 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 289.6666666666667) internal successors, (869), 3 states have internal predecessors, (869), 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) [2023-11-12 02:33:45,319 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 578.0) internal successors, (2312), 4 states have internal predecessors, (2312), 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) [2023-11-12 02:33:45,321 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 578.0) internal successors, (2312), 4 states have internal predecessors, (2312), 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) [2023-11-12 02:33:45,322 INFO L175 Difference]: Start difference. First operand has 100 places, 98 transitions, 226 flow. Second operand 3 states and 869 transitions. [2023-11-12 02:33:45,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 99 transitions, 390 flow [2023-11-12 02:33:45,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 99 transitions, 386 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-12 02:33:45,337 INFO L231 Difference]: Finished difference. Result has 101 places, 99 transitions, 236 flow [2023-11-12 02:33:45,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=578, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=236, PETRI_PLACES=101, PETRI_TRANSITIONS=99} [2023-11-12 02:33:45,339 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, -1 predicate places. [2023-11-12 02:33:45,339 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 99 transitions, 236 flow [2023-11-12 02:33:45,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 262.6666666666667) internal successors, (788), 3 states have internal predecessors, (788), 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) [2023-11-12 02:33:45,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:33:45,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-12 02:33:45,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 02:33:45,341 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2023-11-12 02:33:45,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:33:45,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1174625, now seen corresponding path program 1 times [2023-11-12 02:33:45,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:33:45,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044699674] [2023-11-12 02:33:45,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:45,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:33:45,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:33:45,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:33:45,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:33:45,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044699674] [2023-11-12 02:33:45,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044699674] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:33:45,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767637085] [2023-11-12 02:33:45,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:45,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:33:45,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcf2c42b-01b6-4659-aa2a-d27a41a793d0/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:33:45,762 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcf2c42b-01b6-4659-aa2a-d27a41a793d0/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:33:45,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcf2c42b-01b6-4659-aa2a-d27a41a793d0/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:33:45,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:33:45,918 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-12 02:33:45,923 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:33:46,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:33:46,046 INFO L351 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 [2023-11-12 02:33:46,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:33:46,071 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:33:46,249 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:33:46,250 INFO L351 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 46 treesize of output 64 [2023-11-12 02:33:46,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:33:46,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767637085] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:33:46,430 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:33:46,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-11-12 02:33:46,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300474311] [2023-11-12 02:33:46,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:33:46,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 02:33:46,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:33:46,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 02:33:46,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:33:49,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 252 out of 578 [2023-11-12 02:33:49,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 99 transitions, 236 flow. Second operand has 8 states, 8 states have (on average 253.125) internal successors, (2025), 8 states have internal predecessors, (2025), 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) [2023-11-12 02:33:49,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:33:49,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 252 of 578 [2023-11-12 02:33:49,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:33:52,988 INFO L124 PetriNetUnfolderBase]: 17458/30119 cut-off events. [2023-11-12 02:33:52,988 INFO L125 PetriNetUnfolderBase]: For 375/375 co-relation queries the response was YES. [2023-11-12 02:33:53,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57753 conditions, 30119 events. 17458/30119 cut-off events. For 375/375 co-relation queries the response was YES. Maximal size of possible extension queue 1031. Compared 239823 event pairs, 16735 based on Foata normal form. 0/15095 useless extension candidates. Maximal degree in co-relation 57745. Up to 26727 conditions per place. [2023-11-12 02:33:53,130 INFO L140 encePairwiseOnDemand]: 574/578 looper letters, 79 selfloop transitions, 7 changer transitions 0/104 dead transitions. [2023-11-12 02:33:53,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 104 transitions, 428 flow [2023-11-12 02:33:53,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:33:53,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-12 02:33:53,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1602 transitions. [2023-11-12 02:33:53,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4619377162629758 [2023-11-12 02:33:53,137 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1602 transitions. [2023-11-12 02:33:53,137 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1602 transitions. [2023-11-12 02:33:53,139 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:33:53,139 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1602 transitions. [2023-11-12 02:33:53,144 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 267.0) internal successors, (1602), 6 states have internal predecessors, (1602), 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) [2023-11-12 02:33:53,154 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 578.0) internal successors, (4046), 7 states have internal predecessors, (4046), 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) [2023-11-12 02:33:53,157 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 578.0) internal successors, (4046), 7 states have internal predecessors, (4046), 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) [2023-11-12 02:33:53,157 INFO L175 Difference]: Start difference. First operand has 101 places, 99 transitions, 236 flow. Second operand 6 states and 1602 transitions. [2023-11-12 02:33:53,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 104 transitions, 428 flow [2023-11-12 02:33:53,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 104 transitions, 424 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-12 02:33:53,169 INFO L231 Difference]: Finished difference. Result has 108 places, 104 transitions, 284 flow [2023-11-12 02:33:53,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=578, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=284, PETRI_PLACES=108, PETRI_TRANSITIONS=104} [2023-11-12 02:33:53,171 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, 6 predicate places. [2023-11-12 02:33:53,171 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 104 transitions, 284 flow [2023-11-12 02:33:53,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 253.125) internal successors, (2025), 8 states have internal predecessors, (2025), 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) [2023-11-12 02:33:53,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:33:53,173 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2023-11-12 02:33:53,182 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcf2c42b-01b6-4659-aa2a-d27a41a793d0/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-12 02:33:53,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcf2c42b-01b6-4659-aa2a-d27a41a793d0/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:33:53,379 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2023-11-12 02:33:53,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:33:53,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1128848290, now seen corresponding path program 1 times [2023-11-12 02:33:53,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:33:53,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672679411] [2023-11-12 02:33:53,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:53,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:33:53,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:33:53,453 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 02:33:53,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:33:53,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672679411] [2023-11-12 02:33:53,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672679411] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:33:53,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:33:53,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:33:53,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222801654] [2023-11-12 02:33:53,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:33:53,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:33:53,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:33:53,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:33:53,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:33:53,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 263 out of 578 [2023-11-12 02:33:53,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 104 transitions, 284 flow. Second operand has 3 states, 3 states have (on average 264.3333333333333) internal successors, (793), 3 states have internal predecessors, (793), 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) [2023-11-12 02:33:53,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:33:53,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 263 of 578 [2023-11-12 02:33:53,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:33:56,430 INFO L124 PetriNetUnfolderBase]: 16393/27570 cut-off events. [2023-11-12 02:33:56,430 INFO L125 PetriNetUnfolderBase]: For 343/343 co-relation queries the response was YES. [2023-11-12 02:33:56,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53737 conditions, 27570 events. 16393/27570 cut-off events. For 343/343 co-relation queries the response was YES. Maximal size of possible extension queue 1017. Compared 216955 event pairs, 10949 based on Foata normal form. 0/14029 useless extension candidates. Maximal degree in co-relation 53726. Up to 17316 conditions per place. [2023-11-12 02:33:56,587 INFO L140 encePairwiseOnDemand]: 574/578 looper letters, 124 selfloop transitions, 4 changer transitions 0/146 dead transitions. [2023-11-12 02:33:56,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 146 transitions, 624 flow [2023-11-12 02:33:56,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:33:56,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:33:56,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 913 transitions. [2023-11-12 02:33:56,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5265282583621684 [2023-11-12 02:33:56,594 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 913 transitions. [2023-11-12 02:33:56,595 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 913 transitions. [2023-11-12 02:33:56,596 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:33:56,596 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 913 transitions. [2023-11-12 02:33:56,599 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 304.3333333333333) internal successors, (913), 3 states have internal predecessors, (913), 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) [2023-11-12 02:33:56,604 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 578.0) internal successors, (2312), 4 states have internal predecessors, (2312), 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) [2023-11-12 02:33:56,606 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 578.0) internal successors, (2312), 4 states have internal predecessors, (2312), 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) [2023-11-12 02:33:56,607 INFO L175 Difference]: Start difference. First operand has 108 places, 104 transitions, 284 flow. Second operand 3 states and 913 transitions. [2023-11-12 02:33:56,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 146 transitions, 624 flow [2023-11-12 02:33:56,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 146 transitions, 606 flow, removed 8 selfloop flow, removed 1 redundant places. [2023-11-12 02:33:56,617 INFO L231 Difference]: Finished difference. Result has 107 places, 102 transitions, 270 flow [2023-11-12 02:33:56,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=578, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=270, PETRI_PLACES=107, PETRI_TRANSITIONS=102} [2023-11-12 02:33:56,618 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, 5 predicate places. [2023-11-12 02:33:56,619 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 102 transitions, 270 flow [2023-11-12 02:33:56,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 264.3333333333333) internal successors, (793), 3 states have internal predecessors, (793), 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) [2023-11-12 02:33:56,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:33:56,620 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2023-11-12 02:33:56,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 02:33:56,621 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2023-11-12 02:33:56,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:33:56,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1128848291, now seen corresponding path program 1 times [2023-11-12 02:33:56,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:33:56,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669347672] [2023-11-12 02:33:56,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:56,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:33:56,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:33:56,727 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:33:56,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:33:56,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669347672] [2023-11-12 02:33:56,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669347672] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:33:56,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426317739] [2023-11-12 02:33:56,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:56,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:33:56,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcf2c42b-01b6-4659-aa2a-d27a41a793d0/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:33:56,730 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcf2c42b-01b6-4659-aa2a-d27a41a793d0/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:33:56,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcf2c42b-01b6-4659-aa2a-d27a41a793d0/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:33:56,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:33:56,890 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 02:33:56,892 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:33:56,909 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:33:56,910 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:33:56,944 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:33:56,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426317739] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:33:56,945 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:33:56,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-11-12 02:33:56,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699553620] [2023-11-12 02:33:56,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:33:56,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-12 02:33:56,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:33:56,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-12 02:33:56,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-11-12 02:33:57,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 578 [2023-11-12 02:33:57,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 102 transitions, 270 flow. Second operand has 9 states, 9 states have (on average 267.22222222222223) internal successors, (2405), 9 states have internal predecessors, (2405), 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) [2023-11-12 02:33:57,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:33:57,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 578 [2023-11-12 02:33:57,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:34:00,138 INFO L124 PetriNetUnfolderBase]: 15428/26734 cut-off events. [2023-11-12 02:34:00,138 INFO L125 PetriNetUnfolderBase]: For 840/840 co-relation queries the response was YES. [2023-11-12 02:34:00,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51771 conditions, 26734 events. 15428/26734 cut-off events. For 840/840 co-relation queries the response was YES. Maximal size of possible extension queue 993. Compared 215070 event pairs, 14776 based on Foata normal form. 4/13818 useless extension candidates. Maximal degree in co-relation 51759. Up to 23645 conditions per place. [2023-11-12 02:34:00,274 INFO L140 encePairwiseOnDemand]: 574/578 looper letters, 77 selfloop transitions, 8 changer transitions 0/104 dead transitions. [2023-11-12 02:34:00,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 104 transitions, 458 flow [2023-11-12 02:34:00,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 02:34:00,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-12 02:34:00,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2217 transitions. [2023-11-12 02:34:00,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47945501730103807 [2023-11-12 02:34:00,285 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2217 transitions. [2023-11-12 02:34:00,286 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2217 transitions. [2023-11-12 02:34:00,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:34:00,288 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2217 transitions. [2023-11-12 02:34:00,296 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 277.125) internal successors, (2217), 8 states have internal predecessors, (2217), 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) [2023-11-12 02:34:00,306 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 578.0) internal successors, (5202), 9 states have internal predecessors, (5202), 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) [2023-11-12 02:34:00,308 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 578.0) internal successors, (5202), 9 states have internal predecessors, (5202), 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) [2023-11-12 02:34:00,309 INFO L175 Difference]: Start difference. First operand has 107 places, 102 transitions, 270 flow. Second operand 8 states and 2217 transitions. [2023-11-12 02:34:00,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 104 transitions, 458 flow [2023-11-12 02:34:00,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 104 transitions, 454 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-12 02:34:00,321 INFO L231 Difference]: Finished difference. Result has 115 places, 103 transitions, 306 flow [2023-11-12 02:34:00,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=578, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=306, PETRI_PLACES=115, PETRI_TRANSITIONS=103} [2023-11-12 02:34:00,322 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, 13 predicate places. [2023-11-12 02:34:00,323 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 103 transitions, 306 flow [2023-11-12 02:34:00,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 267.22222222222223) internal successors, (2405), 9 states have internal predecessors, (2405), 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) [2023-11-12 02:34:00,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:34:00,325 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-11-12 02:34:00,332 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcf2c42b-01b6-4659-aa2a-d27a41a793d0/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:34:00,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcf2c42b-01b6-4659-aa2a-d27a41a793d0/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-12 02:34:00,531 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2023-11-12 02:34:00,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:34:00,531 INFO L85 PathProgramCache]: Analyzing trace with hash 634627167, now seen corresponding path program 2 times [2023-11-12 02:34:00,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:34:00,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192639511] [2023-11-12 02:34:00,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:34:00,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:34:00,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:34:01,527 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:34:01,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:34:01,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192639511] [2023-11-12 02:34:01,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192639511] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:34:01,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103668216] [2023-11-12 02:34:01,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:34:01,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:34:01,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcf2c42b-01b6-4659-aa2a-d27a41a793d0/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:34:01,533 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcf2c42b-01b6-4659-aa2a-d27a41a793d0/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:34:01,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcf2c42b-01b6-4659-aa2a-d27a41a793d0/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:34:01,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:34:01,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:34:01,739 INFO L262 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-12 02:34:01,749 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:34:01,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:34:01,812 INFO L351 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 [2023-11-12 02:34:01,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:34:01,855 INFO L351 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 [2023-11-12 02:34:01,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:34:01,909 INFO L351 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 [2023-11-12 02:34:01,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:34:01,966 INFO L351 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