./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_27-funptr_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ff3f610-3e08-4917-98f5-cb7f55f42813/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ff3f610-3e08-4917-98f5-cb7f55f42813/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ff3f610-3e08-4917-98f5-cb7f55f42813/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ff3f610-3e08-4917-98f5-cb7f55f42813/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_27-funptr_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ff3f610-3e08-4917-98f5-cb7f55f42813/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ff3f610-3e08-4917-98f5-cb7f55f42813/bin/uautomizer-verify-uCwYo4JHxu --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 8d24e1fe59577ae07a5b7a898c9dc79f871eafbb8fdf9529a0c24eed9c094f3d --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 08:05:11,661 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 08:05:11,784 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ff3f610-3e08-4917-98f5-cb7f55f42813/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-19 08:05:11,790 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 08:05:11,791 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 08:05:11,822 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 08:05:11,823 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 08:05:11,824 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 08:05:11,825 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 08:05:11,826 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 08:05:11,827 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 08:05:11,828 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 08:05:11,828 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 08:05:11,829 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 08:05:11,830 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 08:05:11,831 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 08:05:11,832 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 08:05:11,833 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 08:05:11,833 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-19 08:05:11,834 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-19 08:05:11,835 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-19 08:05:11,840 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 08:05:11,840 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-19 08:05:11,841 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 08:05:11,842 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 08:05:11,842 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 08:05:11,843 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 08:05:11,844 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 08:05:11,844 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 08:05:11,848 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:05:11,849 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 08:05:11,849 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 08:05:11,850 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 08:05:11,851 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 08:05:11,852 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 08:05:11,852 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 08:05:11,853 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 08:05:11,854 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 08:05:11,854 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_5ff3f610-3e08-4917-98f5-cb7f55f42813/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ff3f610-3e08-4917-98f5-cb7f55f42813/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8d24e1fe59577ae07a5b7a898c9dc79f871eafbb8fdf9529a0c24eed9c094f3d [2023-11-19 08:05:12,270 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 08:05:12,304 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 08:05:12,310 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 08:05:12,312 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 08:05:12,313 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 08:05:12,315 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ff3f610-3e08-4917-98f5-cb7f55f42813/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/goblint-regression/28-race_reach_27-funptr_racing.i [2023-11-19 08:05:15,717 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 08:05:16,161 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 08:05:16,162 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ff3f610-3e08-4917-98f5-cb7f55f42813/sv-benchmarks/c/goblint-regression/28-race_reach_27-funptr_racing.i [2023-11-19 08:05:16,186 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ff3f610-3e08-4917-98f5-cb7f55f42813/bin/uautomizer-verify-uCwYo4JHxu/data/c4209ad54/db152896a74a465abd39d45f4f1f09a9/FLAG7bf976a5b [2023-11-19 08:05:16,212 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ff3f610-3e08-4917-98f5-cb7f55f42813/bin/uautomizer-verify-uCwYo4JHxu/data/c4209ad54/db152896a74a465abd39d45f4f1f09a9 [2023-11-19 08:05:16,221 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 08:05:16,227 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 08:05:16,232 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 08:05:16,232 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 08:05:16,241 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 08:05:16,247 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:05:16" (1/1) ... [2023-11-19 08:05:16,249 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d9e4794 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:16, skipping insertion in model container [2023-11-19 08:05:16,249 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:05:16" (1/1) ... [2023-11-19 08:05:16,325 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 08:05:16,997 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:05:17,032 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 08:05:17,105 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:05:17,184 WARN L675 CHandler]: The function g is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 08:05:17,193 INFO L206 MainTranslator]: Completed translation [2023-11-19 08:05:17,193 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:17 WrapperNode [2023-11-19 08:05:17,193 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 08:05:17,194 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 08:05:17,195 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 08:05:17,195 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 08:05:17,204 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:17" (1/1) ... [2023-11-19 08:05:17,230 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:17" (1/1) ... [2023-11-19 08:05:17,263 INFO L138 Inliner]: procedures = 273, calls = 44, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 152 [2023-11-19 08:05:17,263 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 08:05:17,264 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 08:05:17,265 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 08:05:17,265 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 08:05:17,276 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:17" (1/1) ... [2023-11-19 08:05:17,277 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:17" (1/1) ... [2023-11-19 08:05:17,282 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:17" (1/1) ... [2023-11-19 08:05:17,283 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:17" (1/1) ... [2023-11-19 08:05:17,294 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:17" (1/1) ... [2023-11-19 08:05:17,316 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:17" (1/1) ... [2023-11-19 08:05:17,319 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:17" (1/1) ... [2023-11-19 08:05:17,321 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:17" (1/1) ... [2023-11-19 08:05:17,327 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 08:05:17,328 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 08:05:17,328 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 08:05:17,328 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 08:05:17,331 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:17" (1/1) ... [2023-11-19 08:05:17,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:05:17,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ff3f610-3e08-4917-98f5-cb7f55f42813/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:05:17,387 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ff3f610-3e08-4917-98f5-cb7f55f42813/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 08:05:17,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ff3f610-3e08-4917-98f5-cb7f55f42813/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 08:05:17,429 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 08:05:17,430 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 08:05:17,430 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 08:05:17,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 08:05:17,431 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-19 08:05:17,431 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 08:05:17,431 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-19 08:05:17,431 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-19 08:05:17,431 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 08:05:17,432 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 08:05:17,432 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 08:05:17,434 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 08:05:17,607 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 08:05:17,610 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 08:05:17,997 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 08:05:18,017 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 08:05:18,018 INFO L302 CfgBuilder]: Removed 16 assume(true) statements. [2023-11-19 08:05:18,023 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:05:18 BoogieIcfgContainer [2023-11-19 08:05:18,023 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 08:05:18,026 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 08:05:18,026 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 08:05:18,030 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 08:05:18,030 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:05:16" (1/3) ... [2023-11-19 08:05:18,031 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73451962 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:05:18, skipping insertion in model container [2023-11-19 08:05:18,031 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:17" (2/3) ... [2023-11-19 08:05:18,032 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73451962 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:05:18, skipping insertion in model container [2023-11-19 08:05:18,032 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:05:18" (3/3) ... [2023-11-19 08:05:18,034 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_27-funptr_racing.i [2023-11-19 08:05:18,058 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 08:05:18,059 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-11-19 08:05:18,059 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 08:05:18,213 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-19 08:05:18,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 146 places, 163 transitions, 333 flow [2023-11-19 08:05:18,423 INFO L124 PetriNetUnfolderBase]: 26/217 cut-off events. [2023-11-19 08:05:18,432 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 08:05:18,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 222 conditions, 217 events. 26/217 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 681 event pairs, 0 based on Foata normal form. 0/176 useless extension candidates. Maximal degree in co-relation 122. Up to 4 conditions per place. [2023-11-19 08:05:18,446 INFO L82 GeneralOperation]: Start removeDead. Operand has 146 places, 163 transitions, 333 flow [2023-11-19 08:05:18,464 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 146 places, 163 transitions, 333 flow [2023-11-19 08:05:18,468 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 08:05:18,495 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 146 places, 163 transitions, 333 flow [2023-11-19 08:05:18,507 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 146 places, 163 transitions, 333 flow [2023-11-19 08:05:18,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 146 places, 163 transitions, 333 flow [2023-11-19 08:05:18,621 INFO L124 PetriNetUnfolderBase]: 26/217 cut-off events. [2023-11-19 08:05:18,621 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 08:05:18,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 222 conditions, 217 events. 26/217 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 681 event pairs, 0 based on Foata normal form. 0/176 useless extension candidates. Maximal degree in co-relation 122. Up to 4 conditions per place. [2023-11-19 08:05:18,637 INFO L119 LiptonReduction]: Number of co-enabled transitions 7560 [2023-11-19 08:05:23,287 INFO L134 LiptonReduction]: Checked pairs total: 15100 [2023-11-19 08:05:23,287 INFO L136 LiptonReduction]: Total number of compositions: 136 [2023-11-19 08:05:23,304 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 08:05:23,312 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;@5c32e45, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 08:05:23,312 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-19 08:05:23,315 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 08:05:23,316 INFO L124 PetriNetUnfolderBase]: 0/3 cut-off events. [2023-11-19 08:05:23,316 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 08:05:23,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:05:23,317 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 08:05:23,318 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-19 08:05:23,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:23,324 INFO L85 PathProgramCache]: Analyzing trace with hash 20449, now seen corresponding path program 1 times [2023-11-19 08:05:23,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:23,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829561256] [2023-11-19 08:05:23,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:23,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:23,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:23,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:05:23,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:23,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829561256] [2023-11-19 08:05:23,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829561256] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:05:23,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:05:23,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 08:05:23,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619983639] [2023-11-19 08:05:23,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:05:23,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:05:23,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:23,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:05:23,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:05:23,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 299 [2023-11-19 08:05:23,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 62 transitions, 131 flow. Second operand has 3 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 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) [2023-11-19 08:05:23,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:05:23,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 299 [2023-11-19 08:05:23,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:05:24,179 INFO L124 PetriNetUnfolderBase]: 290/646 cut-off events. [2023-11-19 08:05:24,179 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 08:05:24,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1258 conditions, 646 events. 290/646 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 3508 event pairs, 80 based on Foata normal form. 53/523 useless extension candidates. Maximal degree in co-relation 1218. Up to 586 conditions per place. [2023-11-19 08:05:24,190 INFO L140 encePairwiseOnDemand]: 279/299 looper letters, 53 selfloop transitions, 2 changer transitions 2/64 dead transitions. [2023-11-19 08:05:24,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 64 transitions, 249 flow [2023-11-19 08:05:24,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:05:24,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:05:24,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 492 transitions. [2023-11-19 08:05:24,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5484949832775919 [2023-11-19 08:05:24,209 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 492 transitions. [2023-11-19 08:05:24,210 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 492 transitions. [2023-11-19 08:05:24,213 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:05:24,215 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 492 transitions. [2023-11-19 08:05:24,221 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 164.0) internal successors, (492), 3 states have internal predecessors, (492), 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) [2023-11-19 08:05:24,227 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 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) [2023-11-19 08:05:24,229 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 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) [2023-11-19 08:05:24,231 INFO L175 Difference]: Start difference. First operand has 47 places, 62 transitions, 131 flow. Second operand 3 states and 492 transitions. [2023-11-19 08:05:24,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 64 transitions, 249 flow [2023-11-19 08:05:24,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 64 transitions, 249 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 08:05:24,239 INFO L231 Difference]: Finished difference. Result has 49 places, 43 transitions, 103 flow [2023-11-19 08:05:24,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=103, PETRI_PLACES=49, PETRI_TRANSITIONS=43} [2023-11-19 08:05:24,245 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 2 predicate places. [2023-11-19 08:05:24,245 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 43 transitions, 103 flow [2023-11-19 08:05:24,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 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) [2023-11-19 08:05:24,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:05:24,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 08:05:24,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 08:05:24,247 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-19 08:05:24,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:24,248 INFO L85 PathProgramCache]: Analyzing trace with hash 20448, now seen corresponding path program 1 times [2023-11-19 08:05:24,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:24,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910993095] [2023-11-19 08:05:24,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:24,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:24,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:24,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:05:24,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:24,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910993095] [2023-11-19 08:05:24,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910993095] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:05:24,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:05:24,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 08:05:24,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735998374] [2023-11-19 08:05:24,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:05:24,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:05:24,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:24,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:05:24,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:05:24,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 299 [2023-11-19 08:05:24,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 43 transitions, 103 flow. Second operand has 3 states, 3 states have (on average 133.66666666666666) internal successors, (401), 3 states have internal predecessors, (401), 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) [2023-11-19 08:05:24,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:05:24,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 299 [2023-11-19 08:05:24,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:05:24,540 INFO L124 PetriNetUnfolderBase]: 222/494 cut-off events. [2023-11-19 08:05:24,540 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2023-11-19 08:05:24,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1038 conditions, 494 events. 222/494 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2351 event pairs, 192 based on Foata normal form. 0/405 useless extension candidates. Maximal degree in co-relation 1007. Up to 432 conditions per place. [2023-11-19 08:05:24,545 INFO L140 encePairwiseOnDemand]: 295/299 looper letters, 49 selfloop transitions, 2 changer transitions 0/58 dead transitions. [2023-11-19 08:05:24,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 58 transitions, 235 flow [2023-11-19 08:05:24,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:05:24,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:05:24,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 452 transitions. [2023-11-19 08:05:24,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5039018952062431 [2023-11-19 08:05:24,552 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 452 transitions. [2023-11-19 08:05:24,552 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 452 transitions. [2023-11-19 08:05:24,553 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:05:24,553 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 452 transitions. [2023-11-19 08:05:24,555 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 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) [2023-11-19 08:05:24,560 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 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) [2023-11-19 08:05:24,561 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 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) [2023-11-19 08:05:24,562 INFO L175 Difference]: Start difference. First operand has 49 places, 43 transitions, 103 flow. Second operand 3 states and 452 transitions. [2023-11-19 08:05:24,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 58 transitions, 235 flow [2023-11-19 08:05:24,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 58 transitions, 231 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 08:05:24,568 INFO L231 Difference]: Finished difference. Result has 45 places, 41 transitions, 99 flow [2023-11-19 08:05:24,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=99, PETRI_PLACES=45, PETRI_TRANSITIONS=41} [2023-11-19 08:05:24,571 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, -2 predicate places. [2023-11-19 08:05:24,575 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 41 transitions, 99 flow [2023-11-19 08:05:24,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 133.66666666666666) internal successors, (401), 3 states have internal predecessors, (401), 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) [2023-11-19 08:05:24,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:05:24,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 08:05:24,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 08:05:24,577 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-19 08:05:24,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:24,584 INFO L85 PathProgramCache]: Analyzing trace with hash 609609843, now seen corresponding path program 1 times [2023-11-19 08:05:24,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:24,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61695890] [2023-11-19 08:05:24,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:24,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:24,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:24,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:05:24,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:24,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61695890] [2023-11-19 08:05:24,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61695890] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:05:24,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125830182] [2023-11-19 08:05:24,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:24,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:05:24,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ff3f610-3e08-4917-98f5-cb7f55f42813/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:05:24,772 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ff3f610-3e08-4917-98f5-cb7f55f42813/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:05:24,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ff3f610-3e08-4917-98f5-cb7f55f42813/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 08:05:24,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:24,879 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 08:05:24,884 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:05:24,957 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-19 08:05:25,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:05:25,075 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:05:25,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:05:25,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125830182] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:05:25,158 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:05:25,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-11-19 08:05:25,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913166945] [2023-11-19 08:05:25,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:05:25,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 08:05:25,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:25,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 08:05:25,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-19 08:05:25,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 299 [2023-11-19 08:05:25,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 41 transitions, 99 flow. Second operand has 8 states, 8 states have (on average 132.875) internal successors, (1063), 8 states have internal predecessors, (1063), 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) [2023-11-19 08:05:25,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:05:25,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 299 [2023-11-19 08:05:25,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:05:25,447 INFO L124 PetriNetUnfolderBase]: 35/109 cut-off events. [2023-11-19 08:05:25,448 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 08:05:25,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 222 conditions, 109 events. 35/109 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 387 event pairs, 0 based on Foata normal form. 17/123 useless extension candidates. Maximal degree in co-relation 214. Up to 68 conditions per place. [2023-11-19 08:05:25,449 INFO L140 encePairwiseOnDemand]: 295/299 looper letters, 37 selfloop transitions, 2 changer transitions 0/44 dead transitions. [2023-11-19 08:05:25,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 44 transitions, 174 flow [2023-11-19 08:05:25,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 08:05:25,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 08:05:25,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 565 transitions. [2023-11-19 08:05:25,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47240802675585286 [2023-11-19 08:05:25,454 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 565 transitions. [2023-11-19 08:05:25,454 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 565 transitions. [2023-11-19 08:05:25,455 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:05:25,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 565 transitions. [2023-11-19 08:05:25,458 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 141.25) internal successors, (565), 4 states have internal predecessors, (565), 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) [2023-11-19 08:05:25,462 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 299.0) internal successors, (1495), 5 states have internal predecessors, (1495), 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) [2023-11-19 08:05:25,463 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 299.0) internal successors, (1495), 5 states have internal predecessors, (1495), 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) [2023-11-19 08:05:25,463 INFO L175 Difference]: Start difference. First operand has 45 places, 41 transitions, 99 flow. Second operand 4 states and 565 transitions. [2023-11-19 08:05:25,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 44 transitions, 174 flow [2023-11-19 08:05:25,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 44 transitions, 171 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 08:05:25,466 INFO L231 Difference]: Finished difference. Result has 32 places, 26 transitions, 61 flow [2023-11-19 08:05:25,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=57, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=61, PETRI_PLACES=32, PETRI_TRANSITIONS=26} [2023-11-19 08:05:25,468 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, -15 predicate places. [2023-11-19 08:05:25,468 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 26 transitions, 61 flow [2023-11-19 08:05:25,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 132.875) internal successors, (1063), 8 states have internal predecessors, (1063), 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) [2023-11-19 08:05:25,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:05:25,471 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-19 08:05:25,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ff3f610-3e08-4917-98f5-cb7f55f42813/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 08:05:25,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ff3f610-3e08-4917-98f5-cb7f55f42813/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:05:25,692 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-19 08:05:25,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:25,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1718036359, now seen corresponding path program 1 times [2023-11-19 08:05:25,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:25,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145913361] [2023-11-19 08:05:25,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:25,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:25,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 08:05:25,720 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 08:05:25,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 08:05:25,751 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 08:05:25,752 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 08:05:25,753 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-11-19 08:05:25,755 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2023-11-19 08:05:25,755 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-11-19 08:05:25,756 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2023-11-19 08:05:25,756 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2023-11-19 08:05:25,756 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2023-11-19 08:05:25,756 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2023-11-19 08:05:25,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 08:05:25,757 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-19 08:05:25,760 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 08:05:25,760 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-19 08:05:25,795 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-19 08:05:25,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 199 places, 228 transitions, 472 flow [2023-11-19 08:05:25,869 INFO L124 PetriNetUnfolderBase]: 48/367 cut-off events. [2023-11-19 08:05:25,869 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-19 08:05:25,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 379 conditions, 367 events. 48/367 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1413 event pairs, 0 based on Foata normal form. 0/294 useless extension candidates. Maximal degree in co-relation 219. Up to 8 conditions per place. [2023-11-19 08:05:25,875 INFO L82 GeneralOperation]: Start removeDead. Operand has 199 places, 228 transitions, 472 flow [2023-11-19 08:05:25,880 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 199 places, 228 transitions, 472 flow [2023-11-19 08:05:25,880 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 08:05:25,881 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 199 places, 228 transitions, 472 flow [2023-11-19 08:05:25,881 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 199 places, 228 transitions, 472 flow [2023-11-19 08:05:25,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 199 places, 228 transitions, 472 flow [2023-11-19 08:05:25,949 INFO L124 PetriNetUnfolderBase]: 48/367 cut-off events. [2023-11-19 08:05:25,950 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-19 08:05:25,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 379 conditions, 367 events. 48/367 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1413 event pairs, 0 based on Foata normal form. 0/294 useless extension candidates. Maximal degree in co-relation 219. Up to 8 conditions per place. [2023-11-19 08:05:25,984 INFO L119 LiptonReduction]: Number of co-enabled transitions 24444 [2023-11-19 08:05:30,736 INFO L134 LiptonReduction]: Checked pairs total: 65346 [2023-11-19 08:05:30,738 INFO L136 LiptonReduction]: Total number of compositions: 174 [2023-11-19 08:05:30,746 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 08:05:30,752 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;@5c32e45, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 08:05:30,752 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-19 08:05:30,754 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 08:05:30,758 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-11-19 08:05:30,758 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 08:05:30,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:05:30,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 08:05:30,759 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-19 08:05:30,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:30,760 INFO L85 PathProgramCache]: Analyzing trace with hash 35381, now seen corresponding path program 1 times [2023-11-19 08:05:30,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:30,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328389152] [2023-11-19 08:05:30,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:30,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:30,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:30,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:05:30,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:30,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328389152] [2023-11-19 08:05:30,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328389152] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:05:30,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:05:30,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 08:05:30,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600953328] [2023-11-19 08:05:30,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:05:30,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:05:30,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:30,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:05:30,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:05:30,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 402 [2023-11-19 08:05:30,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 107 transitions, 230 flow. Second operand has 3 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 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) [2023-11-19 08:05:30,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:05:30,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 402 [2023-11-19 08:05:30,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:05:33,314 INFO L124 PetriNetUnfolderBase]: 11162/18597 cut-off events. [2023-11-19 08:05:33,315 INFO L125 PetriNetUnfolderBase]: For 90/90 co-relation queries the response was YES. [2023-11-19 08:05:33,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35825 conditions, 18597 events. 11162/18597 cut-off events. For 90/90 co-relation queries the response was YES. Maximal size of possible extension queue 604. Compared 140747 event pairs, 5015 based on Foata normal form. 1864/16866 useless extension candidates. Maximal degree in co-relation 2499. Up to 17109 conditions per place. [2023-11-19 08:05:33,522 INFO L140 encePairwiseOnDemand]: 370/402 looper letters, 76 selfloop transitions, 2 changer transitions 1/98 dead transitions. [2023-11-19 08:05:33,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 98 transitions, 370 flow [2023-11-19 08:05:33,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:05:33,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:05:33,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 679 transitions. [2023-11-19 08:05:33,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5630182421227198 [2023-11-19 08:05:33,527 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 679 transitions. [2023-11-19 08:05:33,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 679 transitions. [2023-11-19 08:05:33,528 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:05:33,528 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 679 transitions. [2023-11-19 08:05:33,531 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 226.33333333333334) internal successors, (679), 3 states have internal predecessors, (679), 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) [2023-11-19 08:05:33,534 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 402.0) internal successors, (1608), 4 states have internal predecessors, (1608), 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) [2023-11-19 08:05:33,536 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 402.0) internal successors, (1608), 4 states have internal predecessors, (1608), 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) [2023-11-19 08:05:33,536 INFO L175 Difference]: Start difference. First operand has 80 places, 107 transitions, 230 flow. Second operand 3 states and 679 transitions. [2023-11-19 08:05:33,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 98 transitions, 370 flow [2023-11-19 08:05:33,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 98 transitions, 370 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 08:05:33,542 INFO L231 Difference]: Finished difference. Result has 81 places, 77 transitions, 182 flow [2023-11-19 08:05:33,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=402, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=182, PETRI_PLACES=81, PETRI_TRANSITIONS=77} [2023-11-19 08:05:33,545 INFO L281 CegarLoopForPetriNet]: 80 programPoint places, 1 predicate places. [2023-11-19 08:05:33,545 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 77 transitions, 182 flow [2023-11-19 08:05:33,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 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) [2023-11-19 08:05:33,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:05:33,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 08:05:33,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 08:05:33,547 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-19 08:05:33,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:33,547 INFO L85 PathProgramCache]: Analyzing trace with hash 35383, now seen corresponding path program 1 times [2023-11-19 08:05:33,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:33,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616390011] [2023-11-19 08:05:33,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:33,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:33,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:33,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:05:33,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:33,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616390011] [2023-11-19 08:05:33,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616390011] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:05:33,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:05:33,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 08:05:33,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83775052] [2023-11-19 08:05:33,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:05:33,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:05:33,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:33,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:05:33,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:05:33,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 402 [2023-11-19 08:05:33,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 77 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 184.66666666666666) internal successors, (554), 3 states have internal predecessors, (554), 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) [2023-11-19 08:05:33,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:05:33,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 402 [2023-11-19 08:05:33,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:05:35,603 INFO L124 PetriNetUnfolderBase]: 9128/14915 cut-off events. [2023-11-19 08:05:35,604 INFO L125 PetriNetUnfolderBase]: For 781/781 co-relation queries the response was YES. [2023-11-19 08:05:35,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30091 conditions, 14915 events. 9128/14915 cut-off events. For 781/781 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 106684 event pairs, 7939 based on Foata normal form. 0/12740 useless extension candidates. Maximal degree in co-relation 29960. Up to 12986 conditions per place. [2023-11-19 08:05:35,708 INFO L140 encePairwiseOnDemand]: 398/402 looper letters, 90 selfloop transitions, 2 changer transitions 0/111 dead transitions. [2023-11-19 08:05:35,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 111 transitions, 434 flow [2023-11-19 08:05:35,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:05:35,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:05:35,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 645 transitions. [2023-11-19 08:05:35,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5348258706467661 [2023-11-19 08:05:35,712 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 645 transitions. [2023-11-19 08:05:35,713 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 645 transitions. [2023-11-19 08:05:35,713 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:05:35,714 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 645 transitions. [2023-11-19 08:05:35,716 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 215.0) internal successors, (645), 3 states have internal predecessors, (645), 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) [2023-11-19 08:05:35,720 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 402.0) internal successors, (1608), 4 states have internal predecessors, (1608), 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) [2023-11-19 08:05:35,722 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 402.0) internal successors, (1608), 4 states have internal predecessors, (1608), 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) [2023-11-19 08:05:35,722 INFO L175 Difference]: Start difference. First operand has 81 places, 77 transitions, 182 flow. Second operand 3 states and 645 transitions. [2023-11-19 08:05:35,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 111 transitions, 434 flow [2023-11-19 08:05:35,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 111 transitions, 432 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 08:05:35,729 INFO L231 Difference]: Finished difference. Result has 79 places, 75 transitions, 180 flow [2023-11-19 08:05:35,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=402, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=180, PETRI_PLACES=79, PETRI_TRANSITIONS=75} [2023-11-19 08:05:35,734 INFO L281 CegarLoopForPetriNet]: 80 programPoint places, -1 predicate places. [2023-11-19 08:05:35,734 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 75 transitions, 180 flow [2023-11-19 08:05:35,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 184.66666666666666) internal successors, (554), 3 states have internal predecessors, (554), 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) [2023-11-19 08:05:35,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:05:35,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-19 08:05:35,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 08:05:35,739 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-19 08:05:35,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:35,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1656147215, now seen corresponding path program 1 times [2023-11-19 08:05:35,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:35,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740837903] [2023-11-19 08:05:35,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:35,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:35,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:35,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:05:35,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:35,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740837903] [2023-11-19 08:05:35,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740837903] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:05:35,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258512864] [2023-11-19 08:05:35,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:35,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:05:35,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ff3f610-3e08-4917-98f5-cb7f55f42813/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:05:35,903 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ff3f610-3e08-4917-98f5-cb7f55f42813/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:05:35,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ff3f610-3e08-4917-98f5-cb7f55f42813/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 08:05:35,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:35,998 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 08:05:35,999 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:05:36,014 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-19 08:05:36,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:05:36,053 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:05:36,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:05:36,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258512864] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:05:36,102 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:05:36,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-11-19 08:05:36,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336317728] [2023-11-19 08:05:36,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:05:36,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 08:05:36,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:36,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 08:05:36,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-19 08:05:36,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 402 [2023-11-19 08:05:36,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 75 transitions, 180 flow. Second operand has 7 states, 7 states have (on average 184.71428571428572) internal successors, (1293), 7 states have internal predecessors, (1293), 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) [2023-11-19 08:05:36,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:05:36,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 402 [2023-11-19 08:05:36,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:05:38,131 INFO L124 PetriNetUnfolderBase]: 8336/13644 cut-off events. [2023-11-19 08:05:38,131 INFO L125 PetriNetUnfolderBase]: For 896/896 co-relation queries the response was YES. [2023-11-19 08:05:38,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27562 conditions, 13644 events. 8336/13644 cut-off events. For 896/896 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 96700 event pairs, 1201 based on Foata normal form. 18/12477 useless extension candidates. Maximal degree in co-relation 25101. Up to 10087 conditions per place. [2023-11-19 08:05:38,238 INFO L140 encePairwiseOnDemand]: 398/402 looper letters, 143 selfloop transitions, 4 changer transitions 0/166 dead transitions. [2023-11-19 08:05:38,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 166 transitions, 654 flow [2023-11-19 08:05:38,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 08:05:38,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 08:05:38,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1065 transitions. [2023-11-19 08:05:38,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5298507462686567 [2023-11-19 08:05:38,246 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1065 transitions. [2023-11-19 08:05:38,246 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1065 transitions. [2023-11-19 08:05:38,248 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:05:38,248 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1065 transitions. [2023-11-19 08:05:38,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 213.0) internal successors, (1065), 5 states have internal predecessors, (1065), 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) [2023-11-19 08:05:38,258 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 402.0) internal successors, (2412), 6 states have internal predecessors, (2412), 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) [2023-11-19 08:05:38,260 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 402.0) internal successors, (2412), 6 states have internal predecessors, (2412), 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) [2023-11-19 08:05:38,260 INFO L175 Difference]: Start difference. First operand has 79 places, 75 transitions, 180 flow. Second operand 5 states and 1065 transitions. [2023-11-19 08:05:38,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 166 transitions, 654 flow [2023-11-19 08:05:38,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 166 transitions, 650 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 08:05:38,418 INFO L231 Difference]: Finished difference. Result has 80 places, 74 transitions, 180 flow [2023-11-19 08:05:38,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=402, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=180, PETRI_PLACES=80, PETRI_TRANSITIONS=74} [2023-11-19 08:05:38,420 INFO L281 CegarLoopForPetriNet]: 80 programPoint places, 0 predicate places. [2023-11-19 08:05:38,420 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 74 transitions, 180 flow [2023-11-19 08:05:38,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 184.71428571428572) internal successors, (1293), 7 states have internal predecessors, (1293), 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) [2023-11-19 08:05:38,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:05:38,422 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-19 08:05:38,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ff3f610-3e08-4917-98f5-cb7f55f42813/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 08:05:38,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ff3f610-3e08-4917-98f5-cb7f55f42813/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:05:38,653 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-19 08:05:38,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:38,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1788523286, now seen corresponding path program 1 times [2023-11-19 08:05:38,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:38,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906656035] [2023-11-19 08:05:38,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:38,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:38,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 08:05:38,701 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 08:05:38,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 08:05:38,743 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 08:05:38,743 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 08:05:38,744 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-11-19 08:05:38,744 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2023-11-19 08:05:38,744 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-11-19 08:05:38,745 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2023-11-19 08:05:38,745 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2023-11-19 08:05:38,750 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2023-11-19 08:05:38,751 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2023-11-19 08:05:38,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 08:05:38,751 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-19 08:05:38,754 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 08:05:38,754 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-19 08:05:38,824 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-19 08:05:38,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 252 places, 293 transitions, 613 flow [2023-11-19 08:05:39,003 INFO L124 PetriNetUnfolderBase]: 75/562 cut-off events. [2023-11-19 08:05:39,003 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-19 08:05:39,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 587 conditions, 562 events. 75/562 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2375 event pairs, 1 based on Foata normal form. 0/447 useless extension candidates. Maximal degree in co-relation 375. Up to 16 conditions per place. [2023-11-19 08:05:39,015 INFO L82 GeneralOperation]: Start removeDead. Operand has 252 places, 293 transitions, 613 flow [2023-11-19 08:05:39,024 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 252 places, 293 transitions, 613 flow [2023-11-19 08:05:39,025 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 08:05:39,025 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 252 places, 293 transitions, 613 flow [2023-11-19 08:05:39,026 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 252 places, 293 transitions, 613 flow [2023-11-19 08:05:39,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 252 places, 293 transitions, 613 flow [2023-11-19 08:05:39,174 INFO L124 PetriNetUnfolderBase]: 75/562 cut-off events. [2023-11-19 08:05:39,174 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-19 08:05:39,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 587 conditions, 562 events. 75/562 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2375 event pairs, 1 based on Foata normal form. 0/447 useless extension candidates. Maximal degree in co-relation 375. Up to 16 conditions per place. [2023-11-19 08:05:39,233 INFO L119 LiptonReduction]: Number of co-enabled transitions 49140 [2023-11-19 08:05:44,870 INFO L134 LiptonReduction]: Checked pairs total: 136787 [2023-11-19 08:05:44,871 INFO L136 LiptonReduction]: Total number of compositions: 210 [2023-11-19 08:05:44,873 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 08:05:44,873 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;@5c32e45, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 08:05:44,874 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-19 08:05:44,875 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 08:05:44,876 INFO L124 PetriNetUnfolderBase]: 0/3 cut-off events. [2023-11-19 08:05:44,876 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 08:05:44,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:05:44,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 08:05:44,876 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-19 08:05:44,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:44,877 INFO L85 PathProgramCache]: Analyzing trace with hash 53536, now seen corresponding path program 1 times [2023-11-19 08:05:44,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:44,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974187149] [2023-11-19 08:05:44,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:44,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:44,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:44,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:05:44,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:44,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974187149] [2023-11-19 08:05:44,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974187149] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:05:44,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:05:44,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 08:05:44,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898436531] [2023-11-19 08:05:44,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:05:44,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:05:44,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:44,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:05:44,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:05:44,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 503 [2023-11-19 08:05:44,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 146 transitions, 319 flow. Second operand has 3 states, 3 states have (on average 235.66666666666666) internal successors, (707), 3 states have internal predecessors, (707), 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) [2023-11-19 08:05:44,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:05:44,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 503 [2023-11-19 08:05:44,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand