./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing-deref.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a0165632 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d784c3fb-d88e-4bc7-b163-2c9ff6b151b1/bin/uautomizer-verify-jihMAELWvX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d784c3fb-d88e-4bc7-b163-2c9ff6b151b1/bin/uautomizer-verify-jihMAELWvX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d784c3fb-d88e-4bc7-b163-2c9ff6b151b1/bin/uautomizer-verify-jihMAELWvX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d784c3fb-d88e-4bc7-b163-2c9ff6b151b1/bin/uautomizer-verify-jihMAELWvX/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing-deref.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d784c3fb-d88e-4bc7-b163-2c9ff6b151b1/bin/uautomizer-verify-jihMAELWvX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d784c3fb-d88e-4bc7-b163-2c9ff6b151b1/bin/uautomizer-verify-jihMAELWvX --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash db5eab03de8fef3e653289c5dcf0b220be6d8b09a4df3c07d6d5a066426e755a --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-08 18:29:42,565 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-08 18:29:42,624 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d784c3fb-d88e-4bc7-b163-2c9ff6b151b1/bin/uautomizer-verify-jihMAELWvX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-08 18:29:42,628 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-08 18:29:42,629 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-08 18:29:42,663 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-08 18:29:42,664 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-08 18:29:42,664 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-08 18:29:42,665 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-08 18:29:42,665 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-08 18:29:42,666 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-08 18:29:42,667 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-08 18:29:42,668 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-08 18:29:42,672 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-08 18:29:42,672 INFO L153 SettingsManager]: * Use SBE=true [2024-11-08 18:29:42,673 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-08 18:29:42,673 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-08 18:29:42,673 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-08 18:29:42,673 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-08 18:29:42,674 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-08 18:29:42,674 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-08 18:29:42,674 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-08 18:29:42,675 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-08 18:29:42,675 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-08 18:29:42,675 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-08 18:29:42,675 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-08 18:29:42,676 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-08 18:29:42,678 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-08 18:29:42,678 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-08 18:29:42,679 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-08 18:29:42,679 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-08 18:29:42,679 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-08 18:29:42,680 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-08 18:29:42,680 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 18:29:42,680 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-08 18:29:42,681 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-08 18:29:42,681 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-08 18:29:42,682 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-08 18:29:42,682 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-08 18:29:42,683 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-08 18:29:42,683 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-08 18:29:42,684 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-08 18:29:42,684 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_d784c3fb-d88e-4bc7-b163-2c9ff6b151b1/bin/uautomizer-verify-jihMAELWvX/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d784c3fb-d88e-4bc7-b163-2c9ff6b151b1/bin/uautomizer-verify-jihMAELWvX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> db5eab03de8fef3e653289c5dcf0b220be6d8b09a4df3c07d6d5a066426e755a [2024-11-08 18:29:42,995 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-08 18:29:43,017 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-08 18:29:43,021 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-08 18:29:43,022 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-08 18:29:43,023 INFO L274 PluginConnector]: CDTParser initialized [2024-11-08 18:29:43,025 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d784c3fb-d88e-4bc7-b163-2c9ff6b151b1/bin/uautomizer-verify-jihMAELWvX/../../sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing-deref.i Unable to find full path for "g++" [2024-11-08 18:29:45,157 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-08 18:29:45,445 INFO L384 CDTParser]: Found 1 translation units. [2024-11-08 18:29:45,446 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d784c3fb-d88e-4bc7-b163-2c9ff6b151b1/sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing-deref.i [2024-11-08 18:29:45,465 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d784c3fb-d88e-4bc7-b163-2c9ff6b151b1/bin/uautomizer-verify-jihMAELWvX/data/a04c603f1/f5f3dda449aa495a8f526b6467b252a9/FLAGc24a504a0 [2024-11-08 18:29:45,484 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d784c3fb-d88e-4bc7-b163-2c9ff6b151b1/bin/uautomizer-verify-jihMAELWvX/data/a04c603f1/f5f3dda449aa495a8f526b6467b252a9 [2024-11-08 18:29:45,487 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-08 18:29:45,489 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-08 18:29:45,490 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-08 18:29:45,491 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-08 18:29:45,498 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-08 18:29:45,499 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 06:29:45" (1/1) ... [2024-11-08 18:29:45,500 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d9502a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:29:45, skipping insertion in model container [2024-11-08 18:29:45,500 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 06:29:45" (1/1) ... [2024-11-08 18:29:45,556 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-08 18:29:46,121 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 18:29:46,448 INFO L200 MainTranslator]: Completed pre-run [2024-11-08 18:29:46,516 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 18:29:46,637 INFO L204 MainTranslator]: Completed translation [2024-11-08 18:29:46,637 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:29:46 WrapperNode [2024-11-08 18:29:46,638 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-08 18:29:46,639 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-08 18:29:46,639 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-08 18:29:46,639 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-08 18:29:46,652 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:29:46" (1/1) ... [2024-11-08 18:29:46,721 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:29:46" (1/1) ... [2024-11-08 18:29:46,881 INFO L138 Inliner]: procedures = 280, calls = 1603, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 1773 [2024-11-08 18:29:46,882 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-08 18:29:46,883 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-08 18:29:46,883 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-08 18:29:46,883 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-08 18:29:46,897 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:29:46" (1/1) ... [2024-11-08 18:29:46,897 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:29:46" (1/1) ... [2024-11-08 18:29:46,920 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:29:46" (1/1) ... [2024-11-08 18:29:46,979 INFO L175 MemorySlicer]: Split 1569 memory accesses to 8 slices as follows [2, 2, 14, 5, 259, 5, 1280, 2]. 82 percent of accesses are in the largest equivalence class. The 1548 initializations are split as follows [2, 0, 0, 5, 256, 5, 1280, 0]. The 11 writes are split as follows [0, 1, 8, 0, 1, 0, 0, 1]. [2024-11-08 18:29:46,980 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:29:46" (1/1) ... [2024-11-08 18:29:46,980 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:29:46" (1/1) ... [2024-11-08 18:29:47,041 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:29:46" (1/1) ... [2024-11-08 18:29:47,052 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:29:46" (1/1) ... [2024-11-08 18:29:47,066 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:29:46" (1/1) ... [2024-11-08 18:29:47,076 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:29:46" (1/1) ... [2024-11-08 18:29:47,095 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-08 18:29:47,096 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-08 18:29:47,096 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-08 18:29:47,096 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-08 18:29:47,101 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:29:46" (1/1) ... [2024-11-08 18:29:47,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 18:29:47,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d784c3fb-d88e-4bc7-b163-2c9ff6b151b1/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:29:47,136 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d784c3fb-d88e-4bc7-b163-2c9ff6b151b1/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-08 18:29:47,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d784c3fb-d88e-4bc7-b163-2c9ff6b151b1/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-08 18:29:47,175 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-08 18:29:47,176 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-08 18:29:47,176 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-08 18:29:47,176 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-11-08 18:29:47,176 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2024-11-08 18:29:47,177 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#4 [2024-11-08 18:29:47,177 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#5 [2024-11-08 18:29:47,177 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#6 [2024-11-08 18:29:47,177 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#7 [2024-11-08 18:29:47,178 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2024-11-08 18:29:47,180 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2024-11-08 18:29:47,180 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-08 18:29:47,180 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-11-08 18:29:47,180 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-11-08 18:29:47,181 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-11-08 18:29:47,181 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#3 [2024-11-08 18:29:47,181 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#4 [2024-11-08 18:29:47,181 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#5 [2024-11-08 18:29:47,181 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#6 [2024-11-08 18:29:47,181 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#7 [2024-11-08 18:29:47,182 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-08 18:29:47,182 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-08 18:29:47,183 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-08 18:29:47,183 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-08 18:29:47,183 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-08 18:29:47,184 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-11-08 18:29:47,184 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-11-08 18:29:47,185 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2024-11-08 18:29:47,185 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#7 [2024-11-08 18:29:47,185 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2024-11-08 18:29:47,186 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2024-11-08 18:29:47,186 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-08 18:29:47,186 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-08 18:29:47,187 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-08 18:29:47,187 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-08 18:29:47,187 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-11-08 18:29:47,187 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-11-08 18:29:47,187 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2024-11-08 18:29:47,187 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#7 [2024-11-08 18:29:47,189 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-08 18:29:47,189 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-08 18:29:47,189 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-08 18:29:47,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-08 18:29:47,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-08 18:29:47,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-11-08 18:29:47,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2024-11-08 18:29:47,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#4 [2024-11-08 18:29:47,191 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#5 [2024-11-08 18:29:47,191 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#6 [2024-11-08 18:29:47,191 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#7 [2024-11-08 18:29:47,191 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-08 18:29:47,191 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-08 18:29:47,192 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-08 18:29:47,192 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-08 18:29:47,192 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-11-08 18:29:47,192 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-11-08 18:29:47,193 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-11-08 18:29:47,193 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2024-11-08 18:29:47,193 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-08 18:29:47,193 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-08 18:29:47,195 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-08 18:29:47,479 INFO L238 CfgBuilder]: Building ICFG [2024-11-08 18:29:47,482 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-08 18:29:49,949 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-08 18:29:49,949 INFO L287 CfgBuilder]: Performing block encoding [2024-11-08 18:30:34,875 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-08 18:30:34,875 INFO L316 CfgBuilder]: Removed 11 assume(true) statements. [2024-11-08 18:30:34,876 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 06:30:34 BoogieIcfgContainer [2024-11-08 18:30:34,876 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-08 18:30:34,878 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-08 18:30:34,879 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-08 18:30:34,883 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-08 18:30:34,883 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.11 06:29:45" (1/3) ... [2024-11-08 18:30:34,884 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a7c04bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 06:30:34, skipping insertion in model container [2024-11-08 18:30:34,884 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:29:46" (2/3) ... [2024-11-08 18:30:34,884 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a7c04bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 06:30:34, skipping insertion in model container [2024-11-08 18:30:34,885 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 06:30:34" (3/3) ... [2024-11-08 18:30:34,886 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_86-lists_racing-deref.i [2024-11-08 18:30:34,912 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-08 18:30:34,912 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 44 error locations. [2024-11-08 18:30:34,913 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-08 18:30:35,082 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-11-08 18:30:35,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 139 places, 159 transitions, 338 flow [2024-11-08 18:30:35,344 INFO L124 PetriNetUnfolderBase]: 54/331 cut-off events. [2024-11-08 18:30:35,345 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-11-08 18:30:35,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 348 conditions, 331 events. 54/331 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1688 event pairs, 0 based on Foata normal form. 0/187 useless extension candidates. Maximal degree in co-relation 170. Up to 8 conditions per place. [2024-11-08 18:30:35,355 INFO L82 GeneralOperation]: Start removeDead. Operand has 139 places, 159 transitions, 338 flow [2024-11-08 18:30:35,370 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 139 places, 159 transitions, 338 flow [2024-11-08 18:30:35,385 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 18:30:35,393 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5672eeca, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 18:30:35,393 INFO L334 AbstractCegarLoop]: Starting to check reachability of 75 error locations. [2024-11-08 18:30:35,454 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-08 18:30:35,454 INFO L124 PetriNetUnfolderBase]: 2/10 cut-off events. [2024-11-08 18:30:35,454 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-08 18:30:35,455 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:30:35,455 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-08 18:30:35,456 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-11-08 18:30:35,462 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:30:35,462 INFO L85 PathProgramCache]: Analyzing trace with hash 114582865, now seen corresponding path program 1 times [2024-11-08 18:30:35,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:30:35,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555730570] [2024-11-08 18:30:35,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:30:35,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:30:36,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:30:37,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:30:37,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:30:37,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555730570] [2024-11-08 18:30:37,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555730570] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:30:37,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:30:37,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 18:30:37,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072271960] [2024-11-08 18:30:37,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:30:37,427 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 18:30:37,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:30:37,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 18:30:37,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 18:30:37,622 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 159 [2024-11-08 18:30:37,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 159 transitions, 338 flow. Second operand has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:30:37,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:30:37,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 159 [2024-11-08 18:30:37,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:30:39,171 INFO L124 PetriNetUnfolderBase]: 3289/7667 cut-off events. [2024-11-08 18:30:39,172 INFO L125 PetriNetUnfolderBase]: For 156/156 co-relation queries the response was YES. [2024-11-08 18:30:39,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12959 conditions, 7667 events. 3289/7667 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 65206 event pairs, 3059 based on Foata normal form. 520/7278 useless extension candidates. Maximal degree in co-relation 11438. Up to 5189 conditions per place. [2024-11-08 18:30:39,256 INFO L140 encePairwiseOnDemand]: 142/159 looper letters, 57 selfloop transitions, 2 changer transitions 0/143 dead transitions. [2024-11-08 18:30:39,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 143 transitions, 424 flow [2024-11-08 18:30:39,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 18:30:39,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 18:30:39,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 326 transitions. [2024-11-08 18:30:39,271 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6834381551362684 [2024-11-08 18:30:39,273 INFO L175 Difference]: Start difference. First operand has 139 places, 159 transitions, 338 flow. Second operand 3 states and 326 transitions. [2024-11-08 18:30:39,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 143 transitions, 424 flow [2024-11-08 18:30:39,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 143 transitions, 424 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-08 18:30:39,285 INFO L231 Difference]: Finished difference. Result has 138 places, 143 transitions, 310 flow [2024-11-08 18:30:39,287 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=306, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=310, PETRI_PLACES=138, PETRI_TRANSITIONS=143} [2024-11-08 18:30:39,292 INFO L277 CegarLoopForPetriNet]: 139 programPoint places, -1 predicate places. [2024-11-08 18:30:39,293 INFO L471 AbstractCegarLoop]: Abstraction has has 138 places, 143 transitions, 310 flow [2024-11-08 18:30:39,294 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:30:39,294 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:30:39,294 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-08 18:30:39,295 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-08 18:30:39,295 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-11-08 18:30:39,296 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:30:39,297 INFO L85 PathProgramCache]: Analyzing trace with hash 114582866, now seen corresponding path program 1 times [2024-11-08 18:30:39,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:30:39,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958864725] [2024-11-08 18:30:39,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:30:39,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:30:39,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:30:40,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:30:40,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:30:40,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958864725] [2024-11-08 18:30:40,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958864725] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:30:40,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:30:40,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 18:30:40,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535359345] [2024-11-08 18:30:40,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:30:40,821 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 18:30:40,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:30:40,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 18:30:40,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 18:30:40,908 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 159 [2024-11-08 18:30:40,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 143 transitions, 310 flow. Second operand has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:30:40,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:30:40,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 159 [2024-11-08 18:30:40,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:30:42,084 INFO L124 PetriNetUnfolderBase]: 3289/7665 cut-off events. [2024-11-08 18:30:42,084 INFO L125 PetriNetUnfolderBase]: For 158/158 co-relation queries the response was YES. [2024-11-08 18:30:42,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12959 conditions, 7665 events. 3289/7665 cut-off events. For 158/158 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 65158 event pairs, 3059 based on Foata normal form. 2/6754 useless extension candidates. Maximal degree in co-relation 12943. Up to 5189 conditions per place. [2024-11-08 18:30:42,167 INFO L140 encePairwiseOnDemand]: 155/159 looper letters, 56 selfloop transitions, 2 changer transitions 0/141 dead transitions. [2024-11-08 18:30:42,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 141 transitions, 422 flow [2024-11-08 18:30:42,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 18:30:42,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 18:30:42,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 315 transitions. [2024-11-08 18:30:42,171 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.660377358490566 [2024-11-08 18:30:42,171 INFO L175 Difference]: Start difference. First operand has 138 places, 143 transitions, 310 flow. Second operand 3 states and 315 transitions. [2024-11-08 18:30:42,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 141 transitions, 422 flow [2024-11-08 18:30:42,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 141 transitions, 418 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 18:30:42,180 INFO L231 Difference]: Finished difference. Result has 136 places, 141 transitions, 306 flow [2024-11-08 18:30:42,182 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=306, PETRI_PLACES=136, PETRI_TRANSITIONS=141} [2024-11-08 18:30:42,182 INFO L277 CegarLoopForPetriNet]: 139 programPoint places, -3 predicate places. [2024-11-08 18:30:42,183 INFO L471 AbstractCegarLoop]: Abstraction has has 136 places, 141 transitions, 306 flow [2024-11-08 18:30:42,183 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:30:42,183 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:30:42,183 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-08 18:30:42,184 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-08 18:30:42,184 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-11-08 18:30:42,185 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:30:42,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1553453739, now seen corresponding path program 1 times [2024-11-08 18:30:42,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:30:42,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522599437] [2024-11-08 18:30:42,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:30:42,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:30:42,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:30:42,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:30:42,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:30:42,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522599437] [2024-11-08 18:30:42,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522599437] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:30:42,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:30:42,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 18:30:42,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123161005] [2024-11-08 18:30:42,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:30:42,796 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 18:30:42,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:30:42,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 18:30:42,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 18:30:42,809 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 159 [2024-11-08 18:30:42,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 141 transitions, 306 flow. Second operand has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:30:42,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:30:42,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 159 [2024-11-08 18:30:42,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:30:44,040 INFO L124 PetriNetUnfolderBase]: 3289/7672 cut-off events. [2024-11-08 18:30:44,041 INFO L125 PetriNetUnfolderBase]: For 160/160 co-relation queries the response was YES. [2024-11-08 18:30:44,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12973 conditions, 7672 events. 3289/7672 cut-off events. For 160/160 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 65162 event pairs, 3059 based on Foata normal form. 2/6761 useless extension candidates. Maximal degree in co-relation 12947. Up to 5192 conditions per place. [2024-11-08 18:30:44,112 INFO L140 encePairwiseOnDemand]: 155/159 looper letters, 61 selfloop transitions, 2 changer transitions 0/144 dead transitions. [2024-11-08 18:30:44,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 144 transitions, 442 flow [2024-11-08 18:30:44,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 18:30:44,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 18:30:44,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 320 transitions. [2024-11-08 18:30:44,117 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6708595387840671 [2024-11-08 18:30:44,117 INFO L175 Difference]: Start difference. First operand has 136 places, 141 transitions, 306 flow. Second operand 3 states and 320 transitions. [2024-11-08 18:30:44,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 144 transitions, 442 flow [2024-11-08 18:30:44,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 144 transitions, 434 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 18:30:44,129 INFO L231 Difference]: Finished difference. Result has 137 places, 142 transitions, 316 flow [2024-11-08 18:30:44,130 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=316, PETRI_PLACES=137, PETRI_TRANSITIONS=142} [2024-11-08 18:30:44,131 INFO L277 CegarLoopForPetriNet]: 139 programPoint places, -2 predicate places. [2024-11-08 18:30:44,131 INFO L471 AbstractCegarLoop]: Abstraction has has 137 places, 142 transitions, 316 flow [2024-11-08 18:30:44,131 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:30:44,132 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:30:44,132 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-08 18:30:44,132 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-08 18:30:44,132 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-11-08 18:30:44,133 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:30:44,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1554898646, now seen corresponding path program 1 times [2024-11-08 18:30:44,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:30:44,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138432163] [2024-11-08 18:30:44,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:30:44,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:30:44,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:30:45,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:30:45,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:30:45,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138432163] [2024-11-08 18:30:45,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138432163] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:30:45,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:30:45,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 18:30:45,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807789534] [2024-11-08 18:30:45,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:30:45,070 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 18:30:45,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:30:45,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 18:30:45,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-08 18:30:45,204 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 159 [2024-11-08 18:30:45,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 142 transitions, 316 flow. Second operand has 4 states, 4 states have (on average 85.0) internal successors, (340), 4 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:30:45,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:30:45,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 159 [2024-11-08 18:30:45,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:30:46,735 INFO L124 PetriNetUnfolderBase]: 4075/9583 cut-off events. [2024-11-08 18:30:46,735 INFO L125 PetriNetUnfolderBase]: For 156/156 co-relation queries the response was YES. [2024-11-08 18:30:46,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16339 conditions, 9583 events. 4075/9583 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 85435 event pairs, 2177 based on Foata normal form. 2/8374 useless extension candidates. Maximal degree in co-relation 16319. Up to 3710 conditions per place. [2024-11-08 18:30:46,822 INFO L140 encePairwiseOnDemand]: 152/159 looper letters, 130 selfloop transitions, 4 changer transitions 0/214 dead transitions. [2024-11-08 18:30:46,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 214 transitions, 728 flow [2024-11-08 18:30:46,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 18:30:46,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 18:30:46,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 474 transitions. [2024-11-08 18:30:46,825 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7452830188679245 [2024-11-08 18:30:46,825 INFO L175 Difference]: Start difference. First operand has 137 places, 142 transitions, 316 flow. Second operand 4 states and 474 transitions. [2024-11-08 18:30:46,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 214 transitions, 728 flow [2024-11-08 18:30:46,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 214 transitions, 726 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-08 18:30:46,832 INFO L231 Difference]: Finished difference. Result has 141 places, 143 transitions, 344 flow [2024-11-08 18:30:46,833 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=344, PETRI_PLACES=141, PETRI_TRANSITIONS=143} [2024-11-08 18:30:46,834 INFO L277 CegarLoopForPetriNet]: 139 programPoint places, 2 predicate places. [2024-11-08 18:30:46,834 INFO L471 AbstractCegarLoop]: Abstraction has has 141 places, 143 transitions, 344 flow [2024-11-08 18:30:46,835 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 85.0) internal successors, (340), 4 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:30:46,835 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:30:46,835 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-08 18:30:46,835 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-08 18:30:46,835 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-11-08 18:30:46,836 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:30:46,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1554898645, now seen corresponding path program 1 times [2024-11-08 18:30:46,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:30:46,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827531924] [2024-11-08 18:30:46,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:30:46,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:30:46,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:30:48,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:30:48,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:30:48,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827531924] [2024-11-08 18:30:48,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827531924] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:30:48,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:30:48,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 18:30:48,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155735410] [2024-11-08 18:30:48,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:30:48,179 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 18:30:48,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:30:48,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 18:30:48,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-08 18:30:48,361 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 159 [2024-11-08 18:30:48,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 143 transitions, 344 flow. Second operand has 4 states, 4 states have (on average 82.0) internal successors, (328), 4 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:30:48,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:30:48,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 159 [2024-11-08 18:30:48,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:30:50,029 INFO L124 PetriNetUnfolderBase]: 4105/9846 cut-off events. [2024-11-08 18:30:50,029 INFO L125 PetriNetUnfolderBase]: For 1614/1614 co-relation queries the response was YES. [2024-11-08 18:30:50,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17741 conditions, 9846 events. 4105/9846 cut-off events. For 1614/1614 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 88534 event pairs, 3767 based on Foata normal form. 1/8709 useless extension candidates. Maximal degree in co-relation 17702. Up to 6647 conditions per place. [2024-11-08 18:30:50,098 INFO L140 encePairwiseOnDemand]: 156/159 looper letters, 66 selfloop transitions, 2 changer transitions 0/145 dead transitions. [2024-11-08 18:30:50,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 145 transitions, 484 flow [2024-11-08 18:30:50,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 18:30:50,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 18:30:50,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 310 transitions. [2024-11-08 18:30:50,100 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.649895178197065 [2024-11-08 18:30:50,100 INFO L175 Difference]: Start difference. First operand has 141 places, 143 transitions, 344 flow. Second operand 3 states and 310 transitions. [2024-11-08 18:30:50,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 145 transitions, 484 flow [2024-11-08 18:30:50,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 145 transitions, 482 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-08 18:30:50,108 INFO L231 Difference]: Finished difference. Result has 143 places, 143 transitions, 350 flow [2024-11-08 18:30:50,108 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=350, PETRI_PLACES=143, PETRI_TRANSITIONS=143} [2024-11-08 18:30:50,109 INFO L277 CegarLoopForPetriNet]: 139 programPoint places, 4 predicate places. [2024-11-08 18:30:50,109 INFO L471 AbstractCegarLoop]: Abstraction has has 143 places, 143 transitions, 350 flow [2024-11-08 18:30:50,110 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 82.0) internal successors, (328), 4 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:30:50,110 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:30:50,110 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1] [2024-11-08 18:30:50,110 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-08 18:30:50,110 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-11-08 18:30:50,111 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:30:50,111 INFO L85 PathProgramCache]: Analyzing trace with hash 279002216, now seen corresponding path program 1 times [2024-11-08 18:30:50,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:30:50,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005100907] [2024-11-08 18:30:50,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:30:50,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:30:50,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:30:51,875 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:30:51,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:30:51,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005100907] [2024-11-08 18:30:51,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005100907] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:30:51,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460893881] [2024-11-08 18:30:51,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:30:51,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:30:51,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d784c3fb-d88e-4bc7-b163-2c9ff6b151b1/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:30:51,880 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d784c3fb-d88e-4bc7-b163-2c9ff6b151b1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:30:51,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d784c3fb-d88e-4bc7-b163-2c9ff6b151b1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-08 18:30:52,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:30:52,676 INFO L255 TraceCheckSpWp]: Trace formula consists of 3791 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-08 18:30:52,683 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:30:52,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 18:30:52,822 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 [2024-11-08 18:30:52,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 18:30:52,964 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 [2024-11-08 18:30:53,020 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:30:53,021 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:30:53,264 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 18:30:53,265 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 [2024-11-08 18:30:53,460 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:30:53,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460893881] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:30:53,460 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:30:53,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2024-11-08 18:30:53,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521555369] [2024-11-08 18:30:53,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:30:53,461 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-08 18:30:53,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:30:53,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-08 18:30:53,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2024-11-08 18:30:55,972 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 159 [2024-11-08 18:30:55,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 143 transitions, 350 flow. Second operand has 14 states, 14 states have (on average 82.5) internal successors, (1155), 14 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:30:55,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:30:55,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 159 [2024-11-08 18:30:55,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:30:57,808 INFO L124 PetriNetUnfolderBase]: 4109/9867 cut-off events. [2024-11-08 18:30:57,808 INFO L125 PetriNetUnfolderBase]: For 1086/1086 co-relation queries the response was YES. [2024-11-08 18:30:57,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17789 conditions, 9867 events. 4109/9867 cut-off events. For 1086/1086 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 88675 event pairs, 3767 based on Foata normal form. 5/8734 useless extension candidates. Maximal degree in co-relation 17763. Up to 6649 conditions per place. [2024-11-08 18:30:57,886 INFO L140 encePairwiseOnDemand]: 152/159 looper letters, 75 selfloop transitions, 8 changer transitions 0/160 dead transitions. [2024-11-08 18:30:57,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 160 transitions, 564 flow [2024-11-08 18:30:57,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-08 18:30:57,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-08 18:30:57,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 653 transitions. [2024-11-08 18:30:57,889 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5867026055705301 [2024-11-08 18:30:57,889 INFO L175 Difference]: Start difference. First operand has 143 places, 143 transitions, 350 flow. Second operand 7 states and 653 transitions. [2024-11-08 18:30:57,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 160 transitions, 564 flow [2024-11-08 18:30:57,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 160 transitions, 560 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 18:30:57,897 INFO L231 Difference]: Finished difference. Result has 151 places, 149 transitions, 406 flow [2024-11-08 18:30:57,898 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=406, PETRI_PLACES=151, PETRI_TRANSITIONS=149} [2024-11-08 18:30:57,900 INFO L277 CegarLoopForPetriNet]: 139 programPoint places, 12 predicate places. [2024-11-08 18:30:57,901 INFO L471 AbstractCegarLoop]: Abstraction has has 151 places, 149 transitions, 406 flow [2024-11-08 18:30:57,902 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 82.5) internal successors, (1155), 14 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:30:57,902 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:30:57,902 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-08 18:30:57,931 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d784c3fb-d88e-4bc7-b163-2c9ff6b151b1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-08 18:30:58,102 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d784c3fb-d88e-4bc7-b163-2c9ff6b151b1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:30:58,103 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-11-08 18:30:58,103 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:30:58,103 INFO L85 PathProgramCache]: Analyzing trace with hash 397978485, now seen corresponding path program 1 times [2024-11-08 18:30:58,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:30:58,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785092964] [2024-11-08 18:30:58,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:30:58,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:30:58,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:30:58,588 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-08 18:30:58,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:30:58,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785092964] [2024-11-08 18:30:58,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785092964] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:30:58,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:30:58,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 18:30:58,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596998280] [2024-11-08 18:30:58,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:30:58,590 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 18:30:58,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:30:58,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 18:30:58,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 18:30:58,687 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 159 [2024-11-08 18:30:58,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 149 transitions, 406 flow. Second operand has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:30:58,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:30:58,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 159 [2024-11-08 18:30:58,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:31:00,154 INFO L124 PetriNetUnfolderBase]: 4457/10528 cut-off events. [2024-11-08 18:31:00,155 INFO L125 PetriNetUnfolderBase]: For 907/907 co-relation queries the response was YES. [2024-11-08 18:31:00,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18999 conditions, 10528 events. 4457/10528 cut-off events. For 907/907 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 96412 event pairs, 2895 based on Foata normal form. 0/9292 useless extension candidates. Maximal degree in co-relation 18962. Up to 4462 conditions per place. [2024-11-08 18:31:00,242 INFO L140 encePairwiseOnDemand]: 155/159 looper letters, 101 selfloop transitions, 4 changer transitions 0/183 dead transitions. [2024-11-08 18:31:00,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 183 transitions, 688 flow [2024-11-08 18:31:00,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 18:31:00,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 18:31:00,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 347 transitions. [2024-11-08 18:31:00,244 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7274633123689728 [2024-11-08 18:31:00,245 INFO L175 Difference]: Start difference. First operand has 151 places, 149 transitions, 406 flow. Second operand 3 states and 347 transitions. [2024-11-08 18:31:00,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 183 transitions, 688 flow [2024-11-08 18:31:00,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 183 transitions, 684 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-08 18:31:00,253 INFO L231 Difference]: Finished difference. Result has 150 places, 147 transitions, 406 flow [2024-11-08 18:31:00,254 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=398, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=406, PETRI_PLACES=150, PETRI_TRANSITIONS=147} [2024-11-08 18:31:00,254 INFO L277 CegarLoopForPetriNet]: 139 programPoint places, 11 predicate places. [2024-11-08 18:31:00,255 INFO L471 AbstractCegarLoop]: Abstraction has has 150 places, 147 transitions, 406 flow [2024-11-08 18:31:00,255 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:31:00,255 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:31:00,255 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-08 18:31:00,256 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-08 18:31:00,256 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-11-08 18:31:00,256 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:31:00,256 INFO L85 PathProgramCache]: Analyzing trace with hash 397978486, now seen corresponding path program 1 times [2024-11-08 18:31:00,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:31:00,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572415575] [2024-11-08 18:31:00,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:31:00,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:31:00,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:31:00,709 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:31:00,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:31:00,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572415575] [2024-11-08 18:31:00,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572415575] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:31:00,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089037577] [2024-11-08 18:31:00,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:31:00,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:31:00,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d784c3fb-d88e-4bc7-b163-2c9ff6b151b1/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:31:00,712 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d784c3fb-d88e-4bc7-b163-2c9ff6b151b1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:31:00,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d784c3fb-d88e-4bc7-b163-2c9ff6b151b1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-08 18:31:01,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:31:01,445 INFO L255 TraceCheckSpWp]: Trace formula consists of 3830 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-08 18:31:01,448 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:31:01,479 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:31:01,479 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:31:01,525 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:31:01,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089037577] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:31:01,526 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:31:01,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2024-11-08 18:31:01,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106085971] [2024-11-08 18:31:01,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:31:01,527 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-08 18:31:01,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:31:01,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-08 18:31:01,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-11-08 18:31:01,548 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 159 [2024-11-08 18:31:01,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 147 transitions, 406 flow. Second operand has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:31:01,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:31:01,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 159 [2024-11-08 18:31:01,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:31:03,112 INFO L124 PetriNetUnfolderBase]: 3993/9629 cut-off events. [2024-11-08 18:31:03,112 INFO L125 PetriNetUnfolderBase]: For 1497/1558 co-relation queries the response was YES. [2024-11-08 18:31:03,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17513 conditions, 9629 events. 3993/9629 cut-off events. For 1497/1558 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 86345 event pairs, 3660 based on Foata normal form. 8/8521 useless extension candidates. Maximal degree in co-relation 17470. Up to 6452 conditions per place. [2024-11-08 18:31:03,174 INFO L140 encePairwiseOnDemand]: 154/159 looper letters, 75 selfloop transitions, 8 changer transitions 0/160 dead transitions. [2024-11-08 18:31:03,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 160 transitions, 596 flow [2024-11-08 18:31:03,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-08 18:31:03,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-08 18:31:03,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 761 transitions. [2024-11-08 18:31:03,177 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5982704402515723 [2024-11-08 18:31:03,177 INFO L175 Difference]: Start difference. First operand has 150 places, 147 transitions, 406 flow. Second operand 8 states and 761 transitions. [2024-11-08 18:31:03,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 160 transitions, 596 flow [2024-11-08 18:31:03,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 160 transitions, 586 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-11-08 18:31:03,184 INFO L231 Difference]: Finished difference. Result has 160 places, 146 transitions, 422 flow [2024-11-08 18:31:03,184 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=376, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=422, PETRI_PLACES=160, PETRI_TRANSITIONS=146} [2024-11-08 18:31:03,185 INFO L277 CegarLoopForPetriNet]: 139 programPoint places, 21 predicate places. [2024-11-08 18:31:03,185 INFO L471 AbstractCegarLoop]: Abstraction has has 160 places, 146 transitions, 422 flow [2024-11-08 18:31:03,186 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:31:03,186 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:31:03,186 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 1, 1] [2024-11-08 18:31:03,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d784c3fb-d88e-4bc7-b163-2c9ff6b151b1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-08 18:31:03,386 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d784c3fb-d88e-4bc7-b163-2c9ff6b151b1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:31:03,387 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-11-08 18:31:03,387 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:31:03,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1803291285, now seen corresponding path program 2 times [2024-11-08 18:31:03,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:31:03,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719209079] [2024-11-08 18:31:03,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:31:03,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:31:03,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:31:06,123 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:31:06,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:31:06,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719209079] [2024-11-08 18:31:06,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719209079] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:31:06,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904394352] [2024-11-08 18:31:06,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 18:31:06,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:31:06,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d784c3fb-d88e-4bc7-b163-2c9ff6b151b1/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:31:06,130 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d784c3fb-d88e-4bc7-b163-2c9ff6b151b1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:31:06,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d784c3fb-d88e-4bc7-b163-2c9ff6b151b1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-08 18:31:06,916 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 18:31:06,916 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 18:31:06,932 INFO L255 TraceCheckSpWp]: Trace formula consists of 4019 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-08 18:31:06,937 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:31:07,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 18:31:07,020 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 [2024-11-08 18:31:07,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 18:31:07,156 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 [2024-11-08 18:31:07,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 18:31:07,271 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 [2024-11-08 18:31:07,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 18:31:07,403 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 [2024-11-08 18:31:07,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 18:31:07,537 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 [2024-11-08 18:31:07,589 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:31:07,589 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:31:07,759 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 18:31:07,759 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 [2024-11-08 18:31:07,969 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 18:31:07,970 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 [2024-11-08 18:31:08,232 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 18:31:08,232 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 [2024-11-08 18:31:08,519 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 18:31:08,520 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 [2024-11-08 18:31:08,738 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:31:08,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904394352] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:31:08,738 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:31:08,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2024-11-08 18:31:08,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293735002] [2024-11-08 18:31:08,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:31:08,739 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-08 18:31:08,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:31:08,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-08 18:31:08,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=805, Unknown=0, NotChecked=0, Total=992 [2024-11-08 18:31:19,756 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 159 [2024-11-08 18:31:19,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 146 transitions, 422 flow. Second operand has 32 states, 32 states have (on average 82.5) internal successors, (2640), 32 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:31:19,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:31:19,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 159 [2024-11-08 18:31:19,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:31:22,575 INFO L124 PetriNetUnfolderBase]: 4108/9890 cut-off events. [2024-11-08 18:31:22,576 INFO L125 PetriNetUnfolderBase]: For 1224/1224 co-relation queries the response was YES. [2024-11-08 18:31:22,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17932 conditions, 9890 events. 4108/9890 cut-off events. For 1224/1224 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 88782 event pairs, 3767 based on Foata normal form. 6/8766 useless extension candidates. Maximal degree in co-relation 17886. Up to 6650 conditions per place. [2024-11-08 18:31:22,696 INFO L140 encePairwiseOnDemand]: 155/159 looper letters, 87 selfloop transitions, 15 changer transitions 0/178 dead transitions. [2024-11-08 18:31:22,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 178 transitions, 796 flow [2024-11-08 18:31:22,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-08 18:31:22,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-08 18:31:22,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1078 transitions. [2024-11-08 18:31:22,700 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5649895178197065 [2024-11-08 18:31:22,704 INFO L175 Difference]: Start difference. First operand has 160 places, 146 transitions, 422 flow. Second operand 12 states and 1078 transitions. [2024-11-08 18:31:22,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 178 transitions, 796 flow [2024-11-08 18:31:22,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 178 transitions, 758 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-11-08 18:31:22,717 INFO L231 Difference]: Finished difference. Result has 172 places, 155 transitions, 504 flow [2024-11-08 18:31:22,717 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=404, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=504, PETRI_PLACES=172, PETRI_TRANSITIONS=155} [2024-11-08 18:31:22,718 INFO L277 CegarLoopForPetriNet]: 139 programPoint places, 33 predicate places. [2024-11-08 18:31:22,719 INFO L471 AbstractCegarLoop]: Abstraction has has 172 places, 155 transitions, 504 flow [2024-11-08 18:31:22,721 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 82.5) internal successors, (2640), 32 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:31:22,722 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:31:22,722 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2024-11-08 18:31:22,750 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d784c3fb-d88e-4bc7-b163-2c9ff6b151b1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-08 18:31:22,923 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d784c3fb-d88e-4bc7-b163-2c9ff6b151b1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:31:22,923 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-11-08 18:31:22,924 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:31:22,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1663160394, now seen corresponding path program 2 times [2024-11-08 18:31:22,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:31:22,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525642418] [2024-11-08 18:31:22,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:31:22,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:31:23,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:31:23,610 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:31:23,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:31:23,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525642418] [2024-11-08 18:31:23,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525642418] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:31:23,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520888897] [2024-11-08 18:31:23,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 18:31:23,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:31:23,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d784c3fb-d88e-4bc7-b163-2c9ff6b151b1/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:31:23,614 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d784c3fb-d88e-4bc7-b163-2c9ff6b151b1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:31:23,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d784c3fb-d88e-4bc7-b163-2c9ff6b151b1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-08 18:31:24,398 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-08 18:31:24,398 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 18:31:24,410 INFO L255 TraceCheckSpWp]: Trace formula consists of 3678 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-08 18:31:24,414 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:31:24,425 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-08 18:31:24,454 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2024-11-08 18:31:24,455 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 18:31:24,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520888897] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:31:24,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-08 18:31:24,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [8] total 10 [2024-11-08 18:31:24,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359816353] [2024-11-08 18:31:24,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:31:24,456 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 18:31:24,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:31:24,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 18:31:24,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2024-11-08 18:31:24,528 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 159 [2024-11-08 18:31:24,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 155 transitions, 504 flow. Second operand has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:31:24,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:31:24,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 159 [2024-11-08 18:31:24,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand