./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 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af1d15de-a8d7-448f-a76c-1b92470742f1/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af1d15de-a8d7-448f-a76c-1b92470742f1/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af1d15de-a8d7-448f-a76c-1b92470742f1/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af1d15de-a8d7-448f-a76c-1b92470742f1/bin/uautomizer-verify-VRDe98Ueme/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_af1d15de-a8d7-448f-a76c-1b92470742f1/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af1d15de-a8d7-448f-a76c-1b92470742f1/bin/uautomizer-verify-VRDe98Ueme --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 0.2.4-dev-0e0057c [2023-11-26 12:04:27,953 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 12:04:28,102 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af1d15de-a8d7-448f-a76c-1b92470742f1/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-26 12:04:28,119 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 12:04:28,120 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 12:04:28,168 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 12:04:28,171 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 12:04:28,172 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 12:04:28,173 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 12:04:28,180 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 12:04:28,181 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 12:04:28,182 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 12:04:28,184 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 12:04:28,186 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 12:04:28,187 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 12:04:28,187 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 12:04:28,188 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 12:04:28,189 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 12:04:28,189 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 12:04:28,190 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 12:04:28,190 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-26 12:04:28,191 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-26 12:04:28,192 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-26 12:04:28,192 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 12:04:28,193 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-26 12:04:28,194 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-26 12:04:28,194 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 12:04:28,195 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 12:04:28,196 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 12:04:28,197 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 12:04:28,199 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 12:04:28,199 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 12:04:28,200 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 12:04:28,200 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 12:04:28,201 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 12:04:28,212 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 12:04:28,212 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 12:04:28,213 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 12:04:28,213 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 12:04:28,213 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 12:04:28,214 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 12:04:28,214 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_af1d15de-a8d7-448f-a76c-1b92470742f1/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af1d15de-a8d7-448f-a76c-1b92470742f1/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> db5eab03de8fef3e653289c5dcf0b220be6d8b09a4df3c07d6d5a066426e755a [2023-11-26 12:04:28,573 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 12:04:28,614 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 12:04:28,618 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 12:04:28,619 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 12:04:28,620 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 12:04:28,621 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af1d15de-a8d7-448f-a76c-1b92470742f1/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing-deref.i [2023-11-26 12:04:32,199 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 12:04:32,649 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 12:04:32,650 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af1d15de-a8d7-448f-a76c-1b92470742f1/sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing-deref.i [2023-11-26 12:04:32,676 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af1d15de-a8d7-448f-a76c-1b92470742f1/bin/uautomizer-verify-VRDe98Ueme/data/ab4d625bf/f6a277cf3f6949c6b814b5c5f040af6b/FLAGf763bd185 [2023-11-26 12:04:32,695 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af1d15de-a8d7-448f-a76c-1b92470742f1/bin/uautomizer-verify-VRDe98Ueme/data/ab4d625bf/f6a277cf3f6949c6b814b5c5f040af6b [2023-11-26 12:04:32,698 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 12:04:32,700 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 12:04:32,702 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 12:04:32,702 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 12:04:32,710 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 12:04:32,711 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:04:32" (1/1) ... [2023-11-26 12:04:32,712 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66bcf055 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:32, skipping insertion in model container [2023-11-26 12:04:32,713 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:04:32" (1/1) ... [2023-11-26 12:04:32,778 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 12:04:33,508 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 12:04:33,609 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 12:04:33,673 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 12:04:33,790 INFO L206 MainTranslator]: Completed translation [2023-11-26 12:04:33,791 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:33 WrapperNode [2023-11-26 12:04:33,791 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 12:04:33,793 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 12:04:33,794 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 12:04:33,795 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 12:04:33,805 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:33" (1/1) ... [2023-11-26 12:04:33,864 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:33" (1/1) ... [2023-11-26 12:04:33,929 INFO L138 Inliner]: procedures = 279, calls = 67, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 257 [2023-11-26 12:04:33,931 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 12:04:33,932 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 12:04:33,934 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 12:04:33,934 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 12:04:33,956 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:33" (1/1) ... [2023-11-26 12:04:33,957 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:33" (1/1) ... [2023-11-26 12:04:33,965 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:33" (1/1) ... [2023-11-26 12:04:34,000 INFO L175 MemorySlicer]: Split 35 memory accesses to 8 slices as follows [14, 2, 5, 4, 5, 1, 2, 2]. 40 percent of accesses are in the largest equivalence class. The 12 initializations are split as follows [0, 2, 5, 0, 5, 0, 0, 0]. The 13 writes are split as follows [8, 0, 0, 2, 0, 1, 1, 1]. [2023-11-26 12:04:34,001 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:33" (1/1) ... [2023-11-26 12:04:34,001 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:33" (1/1) ... [2023-11-26 12:04:34,052 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:33" (1/1) ... [2023-11-26 12:04:34,058 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:33" (1/1) ... [2023-11-26 12:04:34,064 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:33" (1/1) ... [2023-11-26 12:04:34,075 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:33" (1/1) ... [2023-11-26 12:04:34,092 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 12:04:34,093 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 12:04:34,093 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 12:04:34,094 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 12:04:34,095 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:33" (1/1) ... [2023-11-26 12:04:34,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 12:04:34,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af1d15de-a8d7-448f-a76c-1b92470742f1/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:04:34,141 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af1d15de-a8d7-448f-a76c-1b92470742f1/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 12:04:34,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af1d15de-a8d7-448f-a76c-1b92470742f1/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 12:04:34,199 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 12:04:34,200 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-26 12:04:34,200 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-26 12:04:34,200 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-11-26 12:04:34,201 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2023-11-26 12:04:34,201 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#4 [2023-11-26 12:04:34,201 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#5 [2023-11-26 12:04:34,201 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#6 [2023-11-26 12:04:34,201 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#7 [2023-11-26 12:04:34,201 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2023-11-26 12:04:34,202 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2023-11-26 12:04:34,202 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 12:04:34,204 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-26 12:04:34,204 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 12:04:34,204 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 12:04:34,204 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-26 12:04:34,205 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-26 12:04:34,205 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-26 12:04:34,205 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2023-11-26 12:04:34,205 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2023-11-26 12:04:34,205 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#7 [2023-11-26 12:04:34,206 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2023-11-26 12:04:34,206 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2023-11-26 12:04:34,206 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 12:04:34,207 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 12:04:34,207 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 12:04:34,207 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-26 12:04:34,207 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-26 12:04:34,208 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2023-11-26 12:04:34,208 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2023-11-26 12:04:34,209 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#7 [2023-11-26 12:04:34,209 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-26 12:04:34,210 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-26 12:04:34,210 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 12:04:34,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-26 12:04:34,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-26 12:04:34,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-11-26 12:04:34,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2023-11-26 12:04:34,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#4 [2023-11-26 12:04:34,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#5 [2023-11-26 12:04:34,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#6 [2023-11-26 12:04:34,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#7 [2023-11-26 12:04:34,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 12:04:34,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 12:04:34,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 12:04:34,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-26 12:04:34,213 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-26 12:04:34,213 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-11-26 12:04:34,213 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2023-11-26 12:04:34,213 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2023-11-26 12:04:34,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 12:04:34,213 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 12:04:34,218 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-26 12:04:34,490 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 12:04:34,493 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 12:04:35,124 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 12:04:35,399 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 12:04:35,399 INFO L309 CfgBuilder]: Removed 16 assume(true) statements. [2023-11-26 12:04:35,400 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:04:35 BoogieIcfgContainer [2023-11-26 12:04:35,400 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 12:04:35,403 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 12:04:35,403 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 12:04:35,407 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 12:04:35,408 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:04:32" (1/3) ... [2023-11-26 12:04:35,409 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20d18870 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:04:35, skipping insertion in model container [2023-11-26 12:04:35,409 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:33" (2/3) ... [2023-11-26 12:04:35,410 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20d18870 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:04:35, skipping insertion in model container [2023-11-26 12:04:35,410 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:04:35" (3/3) ... [2023-11-26 12:04:35,412 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_86-lists_racing-deref.i [2023-11-26 12:04:35,436 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 12:04:35,436 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 44 error locations. [2023-11-26 12:04:35,437 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-26 12:04:35,587 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-26 12:04:35,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 144 transitions, 308 flow [2023-11-26 12:04:35,782 INFO L124 PetriNetUnfolderBase]: 39/286 cut-off events. [2023-11-26 12:04:35,782 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-11-26 12:04:35,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 303 conditions, 286 events. 39/286 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1507 event pairs, 0 based on Foata normal form. 0/155 useless extension candidates. Maximal degree in co-relation 149. Up to 8 conditions per place. [2023-11-26 12:04:35,791 INFO L82 GeneralOperation]: Start removeDead. Operand has 129 places, 144 transitions, 308 flow [2023-11-26 12:04:35,802 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 129 places, 144 transitions, 308 flow [2023-11-26 12:04:35,814 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 12:04:35,825 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3df041c5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 12:04:35,825 INFO L358 AbstractCegarLoop]: Starting to check reachability of 75 error locations. [2023-11-26 12:04:35,830 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-26 12:04:35,831 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-26 12:04:35,831 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-26 12:04:35,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:04:35,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-26 12:04:35,833 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2023-11-26 12:04:35,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:04:35,839 INFO L85 PathProgramCache]: Analyzing trace with hash 672371, now seen corresponding path program 1 times [2023-11-26 12:04:35,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:04:35,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095131379] [2023-11-26 12:04:35,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:04:35,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:04:36,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:04:36,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:04:36,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:04:36,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095131379] [2023-11-26 12:04:36,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095131379] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:04:36,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:04:36,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 12:04:36,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7943782] [2023-11-26 12:04:36,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:04:36,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 12:04:36,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:04:36,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 12:04:36,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 12:04:36,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 144 [2023-11-26 12:04:36,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 144 transitions, 308 flow. Second operand has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:36,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:04:36,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 144 [2023-11-26 12:04:36,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 12:04:38,176 INFO L124 PetriNetUnfolderBase]: 3268/7601 cut-off events. [2023-11-26 12:04:38,176 INFO L125 PetriNetUnfolderBase]: For 156/156 co-relation queries the response was YES. [2023-11-26 12:04:38,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12893 conditions, 7601 events. 3268/7601 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 61792 event pairs, 3059 based on Foata normal form. 520/6969 useless extension candidates. Maximal degree in co-relation 11394. Up to 5189 conditions per place. [2023-11-26 12:04:38,290 INFO L140 encePairwiseOnDemand]: 127/144 looper letters, 57 selfloop transitions, 2 changer transitions 0/128 dead transitions. [2023-11-26 12:04:38,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 128 transitions, 394 flow [2023-11-26 12:04:38,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 12:04:38,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 12:04:38,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 281 transitions. [2023-11-26 12:04:38,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6504629629629629 [2023-11-26 12:04:38,306 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 281 transitions. [2023-11-26 12:04:38,306 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 281 transitions. [2023-11-26 12:04:38,308 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 12:04:38,311 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 281 transitions. [2023-11-26 12:04:38,314 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:38,318 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:38,319 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:38,321 INFO L175 Difference]: Start difference. First operand has 129 places, 144 transitions, 308 flow. Second operand 3 states and 281 transitions. [2023-11-26 12:04:38,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 128 transitions, 394 flow [2023-11-26 12:04:38,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 128 transitions, 394 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-26 12:04:38,333 INFO L231 Difference]: Finished difference. Result has 128 places, 128 transitions, 280 flow [2023-11-26 12:04:38,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=280, PETRI_PLACES=128, PETRI_TRANSITIONS=128} [2023-11-26 12:04:38,339 INFO L281 CegarLoopForPetriNet]: 129 programPoint places, -1 predicate places. [2023-11-26 12:04:38,339 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 128 transitions, 280 flow [2023-11-26 12:04:38,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:38,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:04:38,340 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-26 12:04:38,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 12:04:38,340 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2023-11-26 12:04:38,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:04:38,341 INFO L85 PathProgramCache]: Analyzing trace with hash 672372, now seen corresponding path program 1 times [2023-11-26 12:04:38,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:04:38,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644399134] [2023-11-26 12:04:38,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:04:38,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:04:38,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:04:38,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:04:38,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:04:38,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644399134] [2023-11-26 12:04:38,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644399134] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:04:38,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:04:38,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 12:04:38,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549822429] [2023-11-26 12:04:38,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:04:38,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 12:04:38,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:04:38,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 12:04:38,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 12:04:38,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 144 [2023-11-26 12:04:38,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 128 transitions, 280 flow. Second operand has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:38,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:04:38,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 144 [2023-11-26 12:04:38,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 12:04:39,857 INFO L124 PetriNetUnfolderBase]: 3268/7599 cut-off events. [2023-11-26 12:04:39,857 INFO L125 PetriNetUnfolderBase]: For 157/157 co-relation queries the response was YES. [2023-11-26 12:04:39,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12893 conditions, 7599 events. 3268/7599 cut-off events. For 157/157 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 61768 event pairs, 3059 based on Foata normal form. 2/6450 useless extension candidates. Maximal degree in co-relation 12877. Up to 5189 conditions per place. [2023-11-26 12:04:39,939 INFO L140 encePairwiseOnDemand]: 140/144 looper letters, 56 selfloop transitions, 2 changer transitions 0/126 dead transitions. [2023-11-26 12:04:39,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 126 transitions, 392 flow [2023-11-26 12:04:39,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 12:04:39,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 12:04:39,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 270 transitions. [2023-11-26 12:04:39,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2023-11-26 12:04:39,947 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 270 transitions. [2023-11-26 12:04:39,947 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 270 transitions. [2023-11-26 12:04:39,947 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 12:04:39,947 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 270 transitions. [2023-11-26 12:04:39,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:39,954 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:39,955 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:39,955 INFO L175 Difference]: Start difference. First operand has 128 places, 128 transitions, 280 flow. Second operand 3 states and 270 transitions. [2023-11-26 12:04:39,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 126 transitions, 392 flow [2023-11-26 12:04:39,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 126 transitions, 388 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 12:04:39,965 INFO L231 Difference]: Finished difference. Result has 126 places, 126 transitions, 276 flow [2023-11-26 12:04:39,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=276, PETRI_PLACES=126, PETRI_TRANSITIONS=126} [2023-11-26 12:04:39,966 INFO L281 CegarLoopForPetriNet]: 129 programPoint places, -3 predicate places. [2023-11-26 12:04:39,966 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 126 transitions, 276 flow [2023-11-26 12:04:39,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:39,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:04:39,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-26 12:04:39,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 12:04:39,968 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2023-11-26 12:04:39,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:04:39,969 INFO L85 PathProgramCache]: Analyzing trace with hash 20846524, now seen corresponding path program 1 times [2023-11-26 12:04:39,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:04:39,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904217710] [2023-11-26 12:04:39,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:04:39,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:04:40,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:04:40,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:04:40,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:04:40,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904217710] [2023-11-26 12:04:40,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904217710] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:04:40,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:04:40,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 12:04:40,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022572366] [2023-11-26 12:04:40,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:04:40,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 12:04:40,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:04:40,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 12:04:40,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 12:04:40,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 144 [2023-11-26 12:04:40,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 126 transitions, 276 flow. Second operand has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:40,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:04:40,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 144 [2023-11-26 12:04:40,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 12:04:41,441 INFO L124 PetriNetUnfolderBase]: 3268/7605 cut-off events. [2023-11-26 12:04:41,441 INFO L125 PetriNetUnfolderBase]: For 158/158 co-relation queries the response was YES. [2023-11-26 12:04:41,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12904 conditions, 7605 events. 3268/7605 cut-off events. For 158/158 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 61818 event pairs, 3059 based on Foata normal form. 1/6454 useless extension candidates. Maximal degree in co-relation 12879. Up to 5190 conditions per place. [2023-11-26 12:04:41,503 INFO L140 encePairwiseOnDemand]: 141/144 looper letters, 59 selfloop transitions, 2 changer transitions 0/129 dead transitions. [2023-11-26 12:04:41,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 129 transitions, 408 flow [2023-11-26 12:04:41,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 12:04:41,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 12:04:41,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 278 transitions. [2023-11-26 12:04:41,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6435185185185185 [2023-11-26 12:04:41,506 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 278 transitions. [2023-11-26 12:04:41,506 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 278 transitions. [2023-11-26 12:04:41,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 12:04:41,506 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 278 transitions. [2023-11-26 12:04:41,508 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:41,509 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:41,510 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:41,510 INFO L175 Difference]: Start difference. First operand has 126 places, 126 transitions, 276 flow. Second operand 3 states and 278 transitions. [2023-11-26 12:04:41,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 129 transitions, 408 flow [2023-11-26 12:04:41,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 129 transitions, 400 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 12:04:41,522 INFO L231 Difference]: Finished difference. Result has 127 places, 127 transitions, 284 flow [2023-11-26 12:04:41,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=284, PETRI_PLACES=127, PETRI_TRANSITIONS=127} [2023-11-26 12:04:41,525 INFO L281 CegarLoopForPetriNet]: 129 programPoint places, -2 predicate places. [2023-11-26 12:04:41,525 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 127 transitions, 284 flow [2023-11-26 12:04:41,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:41,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:04:41,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-26 12:04:41,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 12:04:41,526 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2023-11-26 12:04:41,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:04:41,527 INFO L85 PathProgramCache]: Analyzing trace with hash 646168844, now seen corresponding path program 1 times [2023-11-26 12:04:41,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:04:41,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051828769] [2023-11-26 12:04:41,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:04:41,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:04:41,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:04:41,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:04:41,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:04:41,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051828769] [2023-11-26 12:04:41,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051828769] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:04:41,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:04:41,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 12:04:41,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911390963] [2023-11-26 12:04:41,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:04:41,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 12:04:41,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:04:41,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 12:04:41,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-26 12:04:41,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 144 [2023-11-26 12:04:41,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 127 transitions, 284 flow. Second operand has 5 states, 5 states have (on average 69.0) internal successors, (345), 5 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:41,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:04:41,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 144 [2023-11-26 12:04:41,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 12:04:43,622 INFO L124 PetriNetUnfolderBase]: 4054/9521 cut-off events. [2023-11-26 12:04:43,623 INFO L125 PetriNetUnfolderBase]: For 156/156 co-relation queries the response was YES. [2023-11-26 12:04:43,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16278 conditions, 9521 events. 4054/9521 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 83192 event pairs, 2177 based on Foata normal form. 2/8050 useless extension candidates. Maximal degree in co-relation 16258. Up to 3712 conditions per place. [2023-11-26 12:04:43,705 INFO L140 encePairwiseOnDemand]: 137/144 looper letters, 131 selfloop transitions, 4 changer transitions 0/199 dead transitions. [2023-11-26 12:04:43,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 199 transitions, 698 flow [2023-11-26 12:04:43,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 12:04:43,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 12:04:43,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 411 transitions. [2023-11-26 12:04:43,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7135416666666666 [2023-11-26 12:04:43,709 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 411 transitions. [2023-11-26 12:04:43,710 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 411 transitions. [2023-11-26 12:04:43,714 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 12:04:43,714 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 411 transitions. [2023-11-26 12:04:43,716 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 102.75) internal successors, (411), 4 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:43,719 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 144.0) internal successors, (720), 5 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:43,719 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 144.0) internal successors, (720), 5 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:43,720 INFO L175 Difference]: Start difference. First operand has 127 places, 127 transitions, 284 flow. Second operand 4 states and 411 transitions. [2023-11-26 12:04:43,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 199 transitions, 698 flow [2023-11-26 12:04:43,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 199 transitions, 696 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 12:04:43,733 INFO L231 Difference]: Finished difference. Result has 131 places, 128 transitions, 312 flow [2023-11-26 12:04:43,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=312, PETRI_PLACES=131, PETRI_TRANSITIONS=128} [2023-11-26 12:04:43,742 INFO L281 CegarLoopForPetriNet]: 129 programPoint places, 2 predicate places. [2023-11-26 12:04:43,742 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 128 transitions, 312 flow [2023-11-26 12:04:43,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 69.0) internal successors, (345), 5 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:43,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:04:43,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-26 12:04:43,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-26 12:04:43,744 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2023-11-26 12:04:43,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:04:43,746 INFO L85 PathProgramCache]: Analyzing trace with hash 646168845, now seen corresponding path program 1 times [2023-11-26 12:04:43,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:04:43,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972186292] [2023-11-26 12:04:43,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:04:43,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:04:43,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:04:44,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:04:44,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:04:44,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972186292] [2023-11-26 12:04:44,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972186292] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:04:44,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:04:44,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 12:04:44,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186094505] [2023-11-26 12:04:44,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:04:44,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 12:04:44,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:04:44,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 12:04:44,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 12:04:44,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 144 [2023-11-26 12:04:44,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 128 transitions, 312 flow. Second operand has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:44,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:04:44,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 144 [2023-11-26 12:04:44,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 12:04:46,159 INFO L124 PetriNetUnfolderBase]: 4084/9782 cut-off events. [2023-11-26 12:04:46,159 INFO L125 PetriNetUnfolderBase]: For 1601/1601 co-relation queries the response was YES. [2023-11-26 12:04:46,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17674 conditions, 9782 events. 4084/9782 cut-off events. For 1601/1601 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 85491 event pairs, 3767 based on Foata normal form. 1/8405 useless extension candidates. Maximal degree in co-relation 17640. Up to 6645 conditions per place. [2023-11-26 12:04:46,257 INFO L140 encePairwiseOnDemand]: 141/144 looper letters, 64 selfloop transitions, 2 changer transitions 0/130 dead transitions. [2023-11-26 12:04:46,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 130 transitions, 448 flow [2023-11-26 12:04:46,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 12:04:46,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 12:04:46,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 269 transitions. [2023-11-26 12:04:46,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6226851851851852 [2023-11-26 12:04:46,260 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 269 transitions. [2023-11-26 12:04:46,260 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 269 transitions. [2023-11-26 12:04:46,261 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 12:04:46,261 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 269 transitions. [2023-11-26 12:04:46,262 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:46,264 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:46,265 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:46,265 INFO L175 Difference]: Start difference. First operand has 131 places, 128 transitions, 312 flow. Second operand 3 states and 269 transitions. [2023-11-26 12:04:46,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 130 transitions, 448 flow [2023-11-26 12:04:46,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 130 transitions, 446 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 12:04:46,278 INFO L231 Difference]: Finished difference. Result has 133 places, 128 transitions, 318 flow [2023-11-26 12:04:46,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=318, PETRI_PLACES=133, PETRI_TRANSITIONS=128} [2023-11-26 12:04:46,282 INFO L281 CegarLoopForPetriNet]: 129 programPoint places, 4 predicate places. [2023-11-26 12:04:46,282 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 128 transitions, 318 flow [2023-11-26 12:04:46,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:46,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:04:46,283 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:04:46,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-26 12:04:46,284 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2023-11-26 12:04:46,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:04:46,286 INFO L85 PathProgramCache]: Analyzing trace with hash -26711051, now seen corresponding path program 1 times [2023-11-26 12:04:46,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:04:46,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895935607] [2023-11-26 12:04:46,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:04:46,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:04:46,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:04:46,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:04:46,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:04:46,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895935607] [2023-11-26 12:04:46,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895935607] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:04:46,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944221550] [2023-11-26 12:04:46,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:04:46,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:04:46,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af1d15de-a8d7-448f-a76c-1b92470742f1/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:04:46,395 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af1d15de-a8d7-448f-a76c-1b92470742f1/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:04:46,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af1d15de-a8d7-448f-a76c-1b92470742f1/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 12:04:46,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:04:46,606 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 12:04:46,611 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:04:46,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:04:46,657 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:04:46,685 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:04:46,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944221550] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:04:46,686 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:04:46,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-26 12:04:46,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786484325] [2023-11-26 12:04:46,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:04:46,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 12:04:46,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:04:46,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 12:04:46,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-26 12:04:46,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 144 [2023-11-26 12:04:46,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 128 transitions, 318 flow. Second operand has 7 states, 7 states have (on average 74.14285714285714) internal successors, (519), 7 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:46,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:04:46,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 144 [2023-11-26 12:04:46,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 12:04:48,073 INFO L124 PetriNetUnfolderBase]: 3973/9561 cut-off events. [2023-11-26 12:04:48,073 INFO L125 PetriNetUnfolderBase]: For 874/935 co-relation queries the response was YES. [2023-11-26 12:04:48,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17134 conditions, 9561 events. 3973/9561 cut-off events. For 874/935 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 83293 event pairs, 3660 based on Foata normal form. 3/8200 useless extension candidates. Maximal degree in co-relation 17109. Up to 6451 conditions per place. [2023-11-26 12:04:48,158 INFO L140 encePairwiseOnDemand]: 140/144 looper letters, 64 selfloop transitions, 6 changer transitions 0/137 dead transitions. [2023-11-26 12:04:48,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 137 transitions, 480 flow [2023-11-26 12:04:48,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 12:04:48,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 12:04:48,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 503 transitions. [2023-11-26 12:04:48,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5821759259259259 [2023-11-26 12:04:48,162 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 503 transitions. [2023-11-26 12:04:48,162 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 503 transitions. [2023-11-26 12:04:48,163 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 12:04:48,163 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 503 transitions. [2023-11-26 12:04:48,164 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 83.83333333333333) internal successors, (503), 6 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:48,167 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 144.0) internal successors, (1008), 7 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:48,168 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 144.0) internal successors, (1008), 7 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:48,168 INFO L175 Difference]: Start difference. First operand has 133 places, 128 transitions, 318 flow. Second operand 6 states and 503 transitions. [2023-11-26 12:04:48,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 137 transitions, 480 flow [2023-11-26 12:04:48,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 137 transitions, 476 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 12:04:48,176 INFO L231 Difference]: Finished difference. Result has 140 places, 131 transitions, 354 flow [2023-11-26 12:04:48,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=354, PETRI_PLACES=140, PETRI_TRANSITIONS=131} [2023-11-26 12:04:48,177 INFO L281 CegarLoopForPetriNet]: 129 programPoint places, 11 predicate places. [2023-11-26 12:04:48,178 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 131 transitions, 354 flow [2023-11-26 12:04:48,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 74.14285714285714) internal successors, (519), 7 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:48,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:04:48,178 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1] [2023-11-26 12:04:48,189 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af1d15de-a8d7-448f-a76c-1b92470742f1/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-26 12:04:48,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af1d15de-a8d7-448f-a76c-1b92470742f1/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:04:48,385 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2023-11-26 12:04:48,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:04:48,386 INFO L85 PathProgramCache]: Analyzing trace with hash -828115980, now seen corresponding path program 1 times [2023-11-26 12:04:48,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:04:48,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115114599] [2023-11-26 12:04:48,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:04:48,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:04:48,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:04:48,826 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:04:48,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:04:48,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115114599] [2023-11-26 12:04:48,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115114599] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:04:48,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461074817] [2023-11-26 12:04:48,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:04:48,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:04:48,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af1d15de-a8d7-448f-a76c-1b92470742f1/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:04:48,829 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af1d15de-a8d7-448f-a76c-1b92470742f1/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:04:48,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af1d15de-a8d7-448f-a76c-1b92470742f1/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 12:04:49,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:04:49,020 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-26 12:04:49,022 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:04:49,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 12:04:49,117 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-26 12:04:49,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 12:04:49,263 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-26 12:04:49,326 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:04:49,326 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:04:49,529 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 12:04:49,529 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2023-11-26 12:04:49,773 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:04:49,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461074817] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:04:49,773 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:04:49,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2023-11-26 12:04:49,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963781972] [2023-11-26 12:04:49,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:04:49,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-26 12:04:49,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:04:49,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-26 12:04:49,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-11-26 12:04:52,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 144 [2023-11-26 12:04:52,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 131 transitions, 354 flow. Second operand has 14 states, 14 states have (on average 69.5) internal successors, (973), 14 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:52,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:04:52,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 144 [2023-11-26 12:04:52,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 12:04:54,889 INFO L124 PetriNetUnfolderBase]: 4084/9794 cut-off events. [2023-11-26 12:04:54,889 INFO L125 PetriNetUnfolderBase]: For 1091/1091 co-relation queries the response was YES. [2023-11-26 12:04:54,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17724 conditions, 9794 events. 4084/9794 cut-off events. For 1091/1091 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 85494 event pairs, 3767 based on Foata normal form. 3/8419 useless extension candidates. Maximal degree in co-relation 17691. Up to 6645 conditions per place. [2023-11-26 12:04:54,982 INFO L140 encePairwiseOnDemand]: 140/144 looper letters, 69 selfloop transitions, 6 changer transitions 0/139 dead transitions. [2023-11-26 12:04:54,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 139 transitions, 532 flow [2023-11-26 12:04:54,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 12:04:54,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-26 12:04:54,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 552 transitions. [2023-11-26 12:04:54,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2023-11-26 12:04:54,986 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 552 transitions. [2023-11-26 12:04:54,986 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 552 transitions. [2023-11-26 12:04:54,987 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 12:04:54,987 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 552 transitions. [2023-11-26 12:04:54,989 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 78.85714285714286) internal successors, (552), 7 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:54,992 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 144.0) internal successors, (1152), 8 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:54,993 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 144.0) internal successors, (1152), 8 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:54,993 INFO L175 Difference]: Start difference. First operand has 140 places, 131 transitions, 354 flow. Second operand 7 states and 552 transitions. [2023-11-26 12:04:54,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 139 transitions, 532 flow [2023-11-26 12:04:54,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 139 transitions, 522 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-11-26 12:04:55,001 INFO L231 Difference]: Finished difference. Result has 149 places, 133 transitions, 386 flow [2023-11-26 12:04:55,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=386, PETRI_PLACES=149, PETRI_TRANSITIONS=133} [2023-11-26 12:04:55,003 INFO L281 CegarLoopForPetriNet]: 129 programPoint places, 20 predicate places. [2023-11-26 12:04:55,003 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 133 transitions, 386 flow [2023-11-26 12:04:55,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 69.5) internal successors, (973), 14 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:55,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:04:55,004 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1] [2023-11-26 12:04:55,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af1d15de-a8d7-448f-a76c-1b92470742f1/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 12:04:55,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af1d15de-a8d7-448f-a76c-1b92470742f1/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-26 12:04:55,211 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2023-11-26 12:04:55,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:04:55,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1270336928, now seen corresponding path program 2 times [2023-11-26 12:04:55,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:04:55,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931701166] [2023-11-26 12:04:55,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:04:55,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:04:55,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:04:55,395 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-26 12:04:55,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:04:55,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931701166] [2023-11-26 12:04:55,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931701166] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:04:55,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:04:55,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 12:04:55,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486311821] [2023-11-26 12:04:55,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:04:55,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 12:04:55,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:04:55,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 12:04:55,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 12:04:55,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 144 [2023-11-26 12:04:55,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 133 transitions, 386 flow. Second operand has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:55,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:04:55,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 144 [2023-11-26 12:04:55,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 12:04:57,320 INFO L124 PetriNetUnfolderBase]: 4432/10459 cut-off events. [2023-11-26 12:04:57,320 INFO L125 PetriNetUnfolderBase]: For 909/909 co-relation queries the response was YES. [2023-11-26 12:04:57,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18930 conditions, 10459 events. 4432/10459 cut-off events. For 909/909 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 93581 event pairs, 2895 based on Foata normal form. 0/8968 useless extension candidates. Maximal degree in co-relation 18887. Up to 4460 conditions per place. [2023-11-26 12:04:57,413 INFO L140 encePairwiseOnDemand]: 140/144 looper letters, 102 selfloop transitions, 2 changer transitions 0/167 dead transitions. [2023-11-26 12:04:57,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 167 transitions, 666 flow [2023-11-26 12:04:57,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 12:04:57,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 12:04:57,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 302 transitions. [2023-11-26 12:04:57,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6990740740740741 [2023-11-26 12:04:57,415 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 302 transitions. [2023-11-26 12:04:57,415 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 302 transitions. [2023-11-26 12:04:57,416 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 12:04:57,416 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 302 transitions. [2023-11-26 12:04:57,417 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:57,418 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:57,419 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:57,419 INFO L175 Difference]: Start difference. First operand has 149 places, 133 transitions, 386 flow. Second operand 3 states and 302 transitions. [2023-11-26 12:04:57,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 167 transitions, 666 flow [2023-11-26 12:04:57,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 167 transitions, 656 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-11-26 12:04:57,427 INFO L231 Difference]: Finished difference. Result has 145 places, 131 transitions, 376 flow [2023-11-26 12:04:57,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=372, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=376, PETRI_PLACES=145, PETRI_TRANSITIONS=131} [2023-11-26 12:04:57,431 INFO L281 CegarLoopForPetriNet]: 129 programPoint places, 16 predicate places. [2023-11-26 12:04:57,431 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 131 transitions, 376 flow [2023-11-26 12:04:57,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:57,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:04:57,431 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1] [2023-11-26 12:04:57,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-26 12:04:57,432 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2023-11-26 12:04:57,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:04:57,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1270336929, now seen corresponding path program 1 times [2023-11-26 12:04:57,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:04:57,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511285591] [2023-11-26 12:04:57,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:04:57,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:04:57,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:04:57,647 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:04:57,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:04:57,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511285591] [2023-11-26 12:04:57,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511285591] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:04:57,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41428471] [2023-11-26 12:04:57,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:04:57,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:04:57,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af1d15de-a8d7-448f-a76c-1b92470742f1/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:04:57,656 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af1d15de-a8d7-448f-a76c-1b92470742f1/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:04:57,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af1d15de-a8d7-448f-a76c-1b92470742f1/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 12:04:57,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:04:57,878 INFO L262 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 12:04:57,881 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:04:57,923 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:04:57,923 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:04:58,003 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:04:58,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41428471] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:04:58,003 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:04:58,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-26 12:04:58,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550639042] [2023-11-26 12:04:58,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:04:58,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-26 12:04:58,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:04:58,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-26 12:04:58,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-26 12:04:58,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 144 [2023-11-26 12:04:58,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 131 transitions, 376 flow. Second operand has 13 states, 13 states have (on average 74.53846153846153) internal successors, (969), 13 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:58,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:04:58,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 144 [2023-11-26 12:04:58,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 12:04:59,302 INFO L124 PetriNetUnfolderBase]: 3974/9590 cut-off events. [2023-11-26 12:04:59,302 INFO L125 PetriNetUnfolderBase]: For 1505/1568 co-relation queries the response was YES. [2023-11-26 12:04:59,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17543 conditions, 9590 events. 3974/9590 cut-off events. For 1505/1568 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 83392 event pairs, 3661 based on Foata normal form. 6/8240 useless extension candidates. Maximal degree in co-relation 17479. Up to 6451 conditions per place. [2023-11-26 12:04:59,381 INFO L140 encePairwiseOnDemand]: 140/144 looper letters, 76 selfloop transitions, 12 changer transitions 0/153 dead transitions. [2023-11-26 12:04:59,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 153 transitions, 658 flow [2023-11-26 12:04:59,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-26 12:04:59,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-26 12:04:59,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 956 transitions. [2023-11-26 12:04:59,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5532407407407407 [2023-11-26 12:04:59,386 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 956 transitions. [2023-11-26 12:04:59,386 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 956 transitions. [2023-11-26 12:04:59,387 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 12:04:59,387 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 956 transitions. [2023-11-26 12:04:59,390 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 79.66666666666667) internal successors, (956), 12 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:59,393 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 144.0) internal successors, (1872), 13 states have internal predecessors, (1872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:59,395 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 144.0) internal successors, (1872), 13 states have internal predecessors, (1872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:59,395 INFO L175 Difference]: Start difference. First operand has 145 places, 131 transitions, 376 flow. Second operand 12 states and 956 transitions. [2023-11-26 12:04:59,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 153 transitions, 658 flow [2023-11-26 12:04:59,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 153 transitions, 654 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 12:04:59,403 INFO L231 Difference]: Finished difference. Result has 161 places, 137 transitions, 472 flow [2023-11-26 12:04:59,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=372, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=472, PETRI_PLACES=161, PETRI_TRANSITIONS=137} [2023-11-26 12:04:59,404 INFO L281 CegarLoopForPetriNet]: 129 programPoint places, 32 predicate places. [2023-11-26 12:04:59,404 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 137 transitions, 472 flow [2023-11-26 12:04:59,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 74.53846153846153) internal successors, (969), 13 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:59,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:04:59,405 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 1, 1] [2023-11-26 12:04:59,416 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af1d15de-a8d7-448f-a76c-1b92470742f1/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 12:04:59,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af1d15de-a8d7-448f-a76c-1b92470742f1/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-26 12:04:59,611 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2023-11-26 12:04:59,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:04:59,612 INFO L85 PathProgramCache]: Analyzing trace with hash 725665705, now seen corresponding path program 2 times [2023-11-26 12:04:59,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:04:59,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876413538] [2023-11-26 12:04:59,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:04:59,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:04:59,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:00,631 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:05:00,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:05:00,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876413538] [2023-11-26 12:05:00,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876413538] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:05:00,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034259665] [2023-11-26 12:05:00,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 12:05:00,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:05:00,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af1d15de-a8d7-448f-a76c-1b92470742f1/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:05:00,633 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af1d15de-a8d7-448f-a76c-1b92470742f1/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:05:00,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af1d15de-a8d7-448f-a76c-1b92470742f1/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 12:05:00,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 12:05:00,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 12:05:00,892 INFO L262 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-26 12:05:00,898 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:05:00,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 12:05:00,955 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-26 12:05:01,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 12:05:01,061 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-26 12:05:01,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 12:05:01,166 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-26 12:05:01,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 12:05:01,267 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-26 12:05:01,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 12:05:01,374 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-26 12:05:01,429 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:05:01,429 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:05:01,597 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 12:05:01,597 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2023-11-26 12:05:01,887 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 12:05:01,887 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 49 treesize of output 67 [2023-11-26 12:05:02,354 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 12:05:02,355 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 55 treesize of output 73 [2023-11-26 12:05:03,007 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 12:05:03,008 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 61 treesize of output 79 [2023-11-26 12:05:03,770 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:05:03,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034259665] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:05:03,771 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:05:03,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-11-26 12:05:03,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268248066] [2023-11-26 12:05:03,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:05:03,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-26 12:05:03,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:05:03,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-26 12:05:03,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=804, Unknown=0, NotChecked=0, Total=992