./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_19-callback_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b894fc99-9e5a-4ad3-bd29-4ad4e2fa4226/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b894fc99-9e5a-4ad3-bd29-4ad4e2fa4226/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b894fc99-9e5a-4ad3-bd29-4ad4e2fa4226/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b894fc99-9e5a-4ad3-bd29-4ad4e2fa4226/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_19-callback_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b894fc99-9e5a-4ad3-bd29-4ad4e2fa4226/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b894fc99-9e5a-4ad3-bd29-4ad4e2fa4226/bin/uautomizer-verify-uTZkv6EMXl --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a178b12ba1b75e8e390c539a1b1599b5e56cbe73098e0c8e7ca0eeb62a619e80 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:27:48,411 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:27:48,480 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b894fc99-9e5a-4ad3-bd29-4ad4e2fa4226/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-12 02:27:48,485 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:27:48,486 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:27:48,520 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:27:48,523 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:27:48,524 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:27:48,525 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:27:48,530 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:27:48,531 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:27:48,532 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:27:48,532 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:27:48,534 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:27:48,535 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:27:48,535 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:27:48,535 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:27:48,536 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:27:48,536 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-12 02:27:48,537 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-12 02:27:48,537 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-12 02:27:48,538 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:27:48,538 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-12 02:27:48,538 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-12 02:27:48,539 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:27:48,539 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:27:48,540 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:27:48,541 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:27:48,541 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:27:48,541 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:27:48,543 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:27:48,543 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:27:48,543 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:27:48,544 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:27:48,544 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:27:48,544 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:27:48,544 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:27:48,544 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:27:48,545 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_b894fc99-9e5a-4ad3-bd29-4ad4e2fa4226/bin/uautomizer-verify-uTZkv6EMXl/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b894fc99-9e5a-4ad3-bd29-4ad4e2fa4226/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a178b12ba1b75e8e390c539a1b1599b5e56cbe73098e0c8e7ca0eeb62a619e80 [2023-11-12 02:27:48,790 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:27:48,819 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:27:48,823 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:27:48,824 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:27:48,825 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:27:48,826 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b894fc99-9e5a-4ad3-bd29-4ad4e2fa4226/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/goblint-regression/28-race_reach_19-callback_racing.i [2023-11-12 02:27:51,883 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:27:52,190 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:27:52,191 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b894fc99-9e5a-4ad3-bd29-4ad4e2fa4226/sv-benchmarks/c/goblint-regression/28-race_reach_19-callback_racing.i [2023-11-12 02:27:52,210 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b894fc99-9e5a-4ad3-bd29-4ad4e2fa4226/bin/uautomizer-verify-uTZkv6EMXl/data/2cd335ec2/118eb6b426684c96ac4159f569abd906/FLAGe49dba254 [2023-11-12 02:27:52,225 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b894fc99-9e5a-4ad3-bd29-4ad4e2fa4226/bin/uautomizer-verify-uTZkv6EMXl/data/2cd335ec2/118eb6b426684c96ac4159f569abd906 [2023-11-12 02:27:52,227 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:27:52,229 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:27:52,230 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:27:52,230 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:27:52,236 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:27:52,244 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:27:52" (1/1) ... [2023-11-12 02:27:52,245 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27bf9043 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:52, skipping insertion in model container [2023-11-12 02:27:52,245 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:27:52" (1/1) ... [2023-11-12 02:27:52,325 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:27:52,741 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:27:52,755 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:27:52,796 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:27:52,834 WARN L672 CHandler]: The function callback is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:27:52,842 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:27:52,843 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:52 WrapperNode [2023-11-12 02:27:52,843 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:27:52,844 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:27:52,844 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:27:52,845 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:27:52,852 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:52" (1/1) ... [2023-11-12 02:27:52,866 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:52" (1/1) ... [2023-11-12 02:27:52,893 INFO L138 Inliner]: procedures = 173, calls = 40, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 139 [2023-11-12 02:27:52,894 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:27:52,895 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:27:52,895 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:27:52,895 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:27:52,905 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:52" (1/1) ... [2023-11-12 02:27:52,905 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:52" (1/1) ... [2023-11-12 02:27:52,909 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:52" (1/1) ... [2023-11-12 02:27:52,910 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:52" (1/1) ... [2023-11-12 02:27:52,917 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:52" (1/1) ... [2023-11-12 02:27:52,921 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:52" (1/1) ... [2023-11-12 02:27:52,923 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:52" (1/1) ... [2023-11-12 02:27:52,925 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:52" (1/1) ... [2023-11-12 02:27:52,929 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:27:52,930 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:27:52,930 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:27:52,930 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:27:52,931 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:52" (1/1) ... [2023-11-12 02:27:52,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:27:52,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b894fc99-9e5a-4ad3-bd29-4ad4e2fa4226/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:27:52,966 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b894fc99-9e5a-4ad3-bd29-4ad4e2fa4226/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:27:52,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b894fc99-9e5a-4ad3-bd29-4ad4e2fa4226/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:27:53,007 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 02:27:53,007 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:27:53,009 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-12 02:27:53,010 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:27:53,010 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 02:27:53,010 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-12 02:27:53,010 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-12 02:27:53,010 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:27:53,011 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:27:53,011 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:27:53,011 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:27:53,013 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-12 02:27:53,148 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:27:53,150 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:27:53,454 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:27:53,464 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:27:53,464 INFO L302 CfgBuilder]: Removed 11 assume(true) statements. [2023-11-12 02:27:53,467 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:27:53 BoogieIcfgContainer [2023-11-12 02:27:53,469 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:27:53,472 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:27:53,472 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:27:53,477 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:27:53,477 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:27:52" (1/3) ... [2023-11-12 02:27:53,478 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c25ea2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:27:53, skipping insertion in model container [2023-11-12 02:27:53,478 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:52" (2/3) ... [2023-11-12 02:27:53,478 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c25ea2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:27:53, skipping insertion in model container [2023-11-12 02:27:53,479 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:27:53" (3/3) ... [2023-11-12 02:27:53,480 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_19-callback_racing.i [2023-11-12 02:27:53,505 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:27:53,505 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-11-12 02:27:53,505 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-12 02:27:53,640 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-12 02:27:53,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 145 places, 158 transitions, 323 flow [2023-11-12 02:27:53,777 INFO L124 PetriNetUnfolderBase]: 27/244 cut-off events. [2023-11-12 02:27:53,777 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-12 02:27:53,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 249 conditions, 244 events. 27/244 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 748 event pairs, 0 based on Foata normal form. 0/203 useless extension candidates. Maximal degree in co-relation 119. Up to 6 conditions per place. [2023-11-12 02:27:53,796 INFO L82 GeneralOperation]: Start removeDead. Operand has 145 places, 158 transitions, 323 flow [2023-11-12 02:27:53,803 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 145 places, 158 transitions, 323 flow [2023-11-12 02:27:53,809 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:27:53,830 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 145 places, 158 transitions, 323 flow [2023-11-12 02:27:53,834 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 145 places, 158 transitions, 323 flow [2023-11-12 02:27:53,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 145 places, 158 transitions, 323 flow [2023-11-12 02:27:53,935 INFO L124 PetriNetUnfolderBase]: 27/244 cut-off events. [2023-11-12 02:27:53,935 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-12 02:27:53,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 249 conditions, 244 events. 27/244 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 748 event pairs, 0 based on Foata normal form. 0/203 useless extension candidates. Maximal degree in co-relation 119. Up to 6 conditions per place. [2023-11-12 02:27:53,946 INFO L119 LiptonReduction]: Number of co-enabled transitions 4968 [2023-11-12 02:27:58,742 INFO L134 LiptonReduction]: Checked pairs total: 6756 [2023-11-12 02:27:58,742 INFO L136 LiptonReduction]: Total number of compositions: 149 [2023-11-12 02:27:58,758 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:27:58,765 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;@22b6e0d7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:27:58,765 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-11-12 02:27:58,768 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:27:58,768 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-12 02:27:58,768 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:27:58,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:27:58,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-12 02:27:58,770 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-12 02:27:58,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:27:58,775 INFO L85 PathProgramCache]: Analyzing trace with hash 19022, now seen corresponding path program 1 times [2023-11-12 02:27:58,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:27:58,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749244340] [2023-11-12 02:27:58,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:58,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:27:58,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:59,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:27:59,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:27:59,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749244340] [2023-11-12 02:27:59,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749244340] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:27:59,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:27:59,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:27:59,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264665982] [2023-11-12 02:27:59,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:27:59,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:27:59,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:27:59,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:27:59,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:27:59,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 307 [2023-11-12 02:27:59,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 40 transitions, 87 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) [2023-11-12 02:27:59,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:27:59,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 307 [2023-11-12 02:27:59,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:27:59,418 INFO L124 PetriNetUnfolderBase]: 102/233 cut-off events. [2023-11-12 02:27:59,418 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-12 02:27:59,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 465 conditions, 233 events. 102/233 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 982 event pairs, 68 based on Foata normal form. 25/180 useless extension candidates. Maximal degree in co-relation 435. Up to 218 conditions per place. [2023-11-12 02:27:59,426 INFO L140 encePairwiseOnDemand]: 295/307 looper letters, 34 selfloop transitions, 2 changer transitions 0/39 dead transitions. [2023-11-12 02:27:59,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 39 transitions, 157 flow [2023-11-12 02:27:59,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:27:59,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:27:59,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 453 transitions. [2023-11-12 02:27:59,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49185667752442996 [2023-11-12 02:27:59,459 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 453 transitions. [2023-11-12 02:27:59,459 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 453 transitions. [2023-11-12 02:27:59,464 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:27:59,468 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 453 transitions. [2023-11-12 02:27:59,473 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 151.0) internal successors, (453), 3 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:27:59,480 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 307.0) internal successors, (1228), 4 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:27:59,486 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 307.0) internal successors, (1228), 4 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:27:59,488 INFO L175 Difference]: Start difference. First operand has 32 places, 40 transitions, 87 flow. Second operand 3 states and 453 transitions. [2023-11-12 02:27:59,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 39 transitions, 157 flow [2023-11-12 02:27:59,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 39 transitions, 157 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-12 02:27:59,495 INFO L231 Difference]: Finished difference. Result has 35 places, 32 transitions, 81 flow [2023-11-12 02:27:59,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=71, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=81, PETRI_PLACES=35, PETRI_TRANSITIONS=32} [2023-11-12 02:27:59,504 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 3 predicate places. [2023-11-12 02:27:59,504 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 32 transitions, 81 flow [2023-11-12 02:27:59,505 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) [2023-11-12 02:27:59,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:27:59,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-12 02:27:59,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:27:59,507 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-12 02:27:59,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:27:59,509 INFO L85 PathProgramCache]: Analyzing trace with hash 19021, now seen corresponding path program 1 times [2023-11-12 02:27:59,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:27:59,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210493571] [2023-11-12 02:27:59,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:59,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:27:59,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:59,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:27:59,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:27:59,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210493571] [2023-11-12 02:27:59,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210493571] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:27:59,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:27:59,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:27:59,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564868595] [2023-11-12 02:27:59,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:27:59,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:27:59,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:27:59,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:27:59,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:27:59,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 307 [2023-11-12 02:27:59,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 32 transitions, 81 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) [2023-11-12 02:27:59,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:27:59,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 307 [2023-11-12 02:27:59,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:27:59,759 INFO L124 PetriNetUnfolderBase]: 92/211 cut-off events. [2023-11-12 02:27:59,759 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-11-12 02:27:59,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 446 conditions, 211 events. 92/211 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 887 event pairs, 70 based on Foata normal form. 0/153 useless extension candidates. Maximal degree in co-relation 415. Up to 178 conditions per place. [2023-11-12 02:27:59,764 INFO L140 encePairwiseOnDemand]: 302/307 looper letters, 29 selfloop transitions, 3 changer transitions 0/35 dead transitions. [2023-11-12 02:27:59,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 35 transitions, 151 flow [2023-11-12 02:27:59,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:27:59,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:27:59,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 433 transitions. [2023-11-12 02:27:59,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47014115092290987 [2023-11-12 02:27:59,767 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 433 transitions. [2023-11-12 02:27:59,768 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 433 transitions. [2023-11-12 02:27:59,768 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:27:59,769 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 433 transitions. [2023-11-12 02:27:59,773 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:27:59,777 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 307.0) internal successors, (1228), 4 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:27:59,779 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 307.0) internal successors, (1228), 4 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:27:59,779 INFO L175 Difference]: Start difference. First operand has 35 places, 32 transitions, 81 flow. Second operand 3 states and 433 transitions. [2023-11-12 02:27:59,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 35 transitions, 151 flow [2023-11-12 02:27:59,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 35 transitions, 147 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-12 02:27:59,783 INFO L231 Difference]: Finished difference. Result has 33 places, 30 transitions, 79 flow [2023-11-12 02:27:59,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=73, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=79, PETRI_PLACES=33, PETRI_TRANSITIONS=30} [2023-11-12 02:27:59,786 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 1 predicate places. [2023-11-12 02:27:59,789 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 30 transitions, 79 flow [2023-11-12 02:27:59,790 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) [2023-11-12 02:27:59,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:27:59,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-12 02:27:59,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 02:27:59,791 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-12 02:27:59,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:27:59,791 INFO L85 PathProgramCache]: Analyzing trace with hash 567040952, now seen corresponding path program 1 times [2023-11-12 02:27:59,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:27:59,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490265644] [2023-11-12 02:27:59,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:59,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:27:59,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:59,924 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:27:59,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:27:59,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490265644] [2023-11-12 02:27:59,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490265644] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:27:59,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13601471] [2023-11-12 02:27:59,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:59,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:27:59,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b894fc99-9e5a-4ad3-bd29-4ad4e2fa4226/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:27:59,933 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b894fc99-9e5a-4ad3-bd29-4ad4e2fa4226/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:27:59,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b894fc99-9e5a-4ad3-bd29-4ad4e2fa4226/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:28:00,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:28:00,021 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-12 02:28:00,026 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:28:00,101 INFO L351 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 [2023-11-12 02:28:00,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:28:00,178 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:28:00,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:28:00,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13601471] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:28:00,267 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:28:00,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-11-12 02:28:00,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646677275] [2023-11-12 02:28:00,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:28:00,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 02:28:00,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:28:00,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 02:28:00,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:28:00,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 307 [2023-11-12 02:28:00,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 30 transitions, 79 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) [2023-11-12 02:28:00,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:28:00,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 307 [2023-11-12 02:28:00,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:28:00,550 INFO L124 PetriNetUnfolderBase]: 10/33 cut-off events. [2023-11-12 02:28:00,551 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-12 02:28:00,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77 conditions, 33 events. 10/33 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 70 event pairs, 4 based on Foata normal form. 6/36 useless extension candidates. Maximal degree in co-relation 69. Up to 22 conditions per place. [2023-11-12 02:28:00,552 INFO L140 encePairwiseOnDemand]: 303/307 looper letters, 13 selfloop transitions, 2 changer transitions 0/17 dead transitions. [2023-11-12 02:28:00,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 17 transitions, 72 flow [2023-11-12 02:28:00,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:28:00,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-12 02:28:00,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 541 transitions. [2023-11-12 02:28:00,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44055374592833874 [2023-11-12 02:28:00,555 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 541 transitions. [2023-11-12 02:28:00,555 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 541 transitions. [2023-11-12 02:28:00,556 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:28:00,556 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 541 transitions. [2023-11-12 02:28:00,558 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 135.25) internal successors, (541), 4 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:00,562 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 307.0) internal successors, (1535), 5 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:00,563 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 307.0) internal successors, (1535), 5 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:00,563 INFO L175 Difference]: Start difference. First operand has 33 places, 30 transitions, 79 flow. Second operand 4 states and 541 transitions. [2023-11-12 02:28:00,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 17 transitions, 72 flow [2023-11-12 02:28:00,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 17 transitions, 69 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-12 02:28:00,564 INFO L231 Difference]: Finished difference. Result has 18 places, 11 transitions, 31 flow [2023-11-12 02:28:00,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=27, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=31, PETRI_PLACES=18, PETRI_TRANSITIONS=11} [2023-11-12 02:28:00,566 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -14 predicate places. [2023-11-12 02:28:00,566 INFO L495 AbstractCegarLoop]: Abstraction has has 18 places, 11 transitions, 31 flow [2023-11-12 02:28:00,567 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) [2023-11-12 02:28:00,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:28:00,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-12 02:28:00,575 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b894fc99-9e5a-4ad3-bd29-4ad4e2fa4226/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:28:00,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b894fc99-9e5a-4ad3-bd29-4ad4e2fa4226/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:28:00,774 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-12 02:28:00,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:28:00,775 INFO L85 PathProgramCache]: Analyzing trace with hash 398380702, now seen corresponding path program 1 times [2023-11-12 02:28:00,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:28:00,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784037178] [2023-11-12 02:28:00,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:28:00,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:28:00,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:28:00,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:28:00,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:28:00,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784037178] [2023-11-12 02:28:00,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784037178] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:28:00,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:28:00,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:28:00,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323875194] [2023-11-12 02:28:00,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:28:00,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:28:00,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:28:00,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:28:00,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:28:00,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 307 [2023-11-12 02:28:00,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 11 transitions, 31 flow. Second operand has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:00,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:28:00,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 307 [2023-11-12 02:28:00,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:28:00,878 INFO L124 PetriNetUnfolderBase]: 8/29 cut-off events. [2023-11-12 02:28:00,878 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-12 02:28:00,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67 conditions, 29 events. 8/29 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 54 event pairs, 8 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 59. Up to 25 conditions per place. [2023-11-12 02:28:00,878 INFO L140 encePairwiseOnDemand]: 305/307 looper letters, 7 selfloop transitions, 1 changer transitions 0/10 dead transitions. [2023-11-12 02:28:00,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 19 places, 10 transitions, 45 flow [2023-11-12 02:28:00,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:28:00,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:28:00,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 426 transitions. [2023-11-12 02:28:00,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46254071661237783 [2023-11-12 02:28:00,881 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 426 transitions. [2023-11-12 02:28:00,881 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 426 transitions. [2023-11-12 02:28:00,882 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:28:00,882 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 426 transitions. [2023-11-12 02:28:00,884 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:00,886 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 307.0) internal successors, (1228), 4 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:00,887 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 307.0) internal successors, (1228), 4 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:00,887 INFO L175 Difference]: Start difference. First operand has 18 places, 11 transitions, 31 flow. Second operand 3 states and 426 transitions. [2023-11-12 02:28:00,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 19 places, 10 transitions, 45 flow [2023-11-12 02:28:00,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 17 places, 10 transitions, 42 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-12 02:28:00,888 INFO L231 Difference]: Finished difference. Result has 17 places, 10 transitions, 28 flow [2023-11-12 02:28:00,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=26, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=10, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=28, PETRI_PLACES=17, PETRI_TRANSITIONS=10} [2023-11-12 02:28:00,889 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -15 predicate places. [2023-11-12 02:28:00,889 INFO L495 AbstractCegarLoop]: Abstraction has has 17 places, 10 transitions, 28 flow [2023-11-12 02:28:00,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:00,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:28:00,890 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-12 02:28:00,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 02:28:00,891 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-12 02:28:00,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:28:00,891 INFO L85 PathProgramCache]: Analyzing trace with hash 398400680, now seen corresponding path program 1 times [2023-11-12 02:28:00,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:28:00,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951295301] [2023-11-12 02:28:00,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:28:00,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:28:00,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:28:00,910 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-12 02:28:00,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:28:00,937 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-12 02:28:00,937 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-12 02:28:00,938 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2023-11-12 02:28:00,940 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 8 remaining) [2023-11-12 02:28:00,941 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 8 remaining) [2023-11-12 02:28:00,941 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 8 remaining) [2023-11-12 02:28:00,942 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 8 remaining) [2023-11-12 02:28:00,942 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (2 of 8 remaining) [2023-11-12 02:28:00,942 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (1 of 8 remaining) [2023-11-12 02:28:00,942 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 8 remaining) [2023-11-12 02:28:00,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 02:28:00,943 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-11-12 02:28:00,945 WARN L234 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-12 02:28:00,946 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-12 02:28:00,971 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-12 02:28:00,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 171 places, 187 transitions, 390 flow [2023-11-12 02:28:01,050 INFO L124 PetriNetUnfolderBase]: 45/390 cut-off events. [2023-11-12 02:28:01,050 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-12 02:28:01,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 402 conditions, 390 events. 45/390 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1500 event pairs, 0 based on Foata normal form. 0/321 useless extension candidates. Maximal degree in co-relation 246. Up to 9 conditions per place. [2023-11-12 02:28:01,054 INFO L82 GeneralOperation]: Start removeDead. Operand has 171 places, 187 transitions, 390 flow [2023-11-12 02:28:01,058 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 171 places, 187 transitions, 390 flow [2023-11-12 02:28:01,058 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:28:01,058 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 171 places, 187 transitions, 390 flow [2023-11-12 02:28:01,058 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 171 places, 187 transitions, 390 flow [2023-11-12 02:28:01,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 171 places, 187 transitions, 390 flow [2023-11-12 02:28:01,115 INFO L124 PetriNetUnfolderBase]: 45/390 cut-off events. [2023-11-12 02:28:01,115 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-12 02:28:01,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 402 conditions, 390 events. 45/390 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1500 event pairs, 0 based on Foata normal form. 0/321 useless extension candidates. Maximal degree in co-relation 246. Up to 9 conditions per place. [2023-11-12 02:28:01,131 INFO L119 LiptonReduction]: Number of co-enabled transitions 11988 [2023-11-12 02:28:05,889 INFO L134 LiptonReduction]: Checked pairs total: 18975 [2023-11-12 02:28:05,890 INFO L136 LiptonReduction]: Total number of compositions: 180 [2023-11-12 02:28:05,892 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:28:05,894 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;@22b6e0d7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:28:05,894 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2023-11-12 02:28:05,896 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:28:05,896 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-12 02:28:05,896 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:28:05,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:28:05,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-12 02:28:05,897 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-12 02:28:05,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:28:05,898 INFO L85 PathProgramCache]: Analyzing trace with hash 31690, now seen corresponding path program 1 times [2023-11-12 02:28:05,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:28:05,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595932918] [2023-11-12 02:28:05,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:28:05,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:28:05,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:28:05,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:28:05,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:28:05,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595932918] [2023-11-12 02:28:05,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595932918] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:28:05,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:28:05,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:28:05,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854620436] [2023-11-12 02:28:05,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:28:05,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:28:05,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:28:05,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:28:05,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:28:05,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 367 [2023-11-12 02:28:05,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 57 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:05,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:28:05,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 367 [2023-11-12 02:28:05,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:28:06,359 INFO L124 PetriNetUnfolderBase]: 1896/3088 cut-off events. [2023-11-12 02:28:06,360 INFO L125 PetriNetUnfolderBase]: For 55/55 co-relation queries the response was YES. [2023-11-12 02:28:06,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6186 conditions, 3088 events. 1896/3088 cut-off events. For 55/55 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 16299 event pairs, 1536 based on Foata normal form. 202/2398 useless extension candidates. Maximal degree in co-relation 2016. Up to 2687 conditions per place. [2023-11-12 02:28:06,383 INFO L140 encePairwiseOnDemand]: 349/367 looper letters, 47 selfloop transitions, 3 changer transitions 0/54 dead transitions. [2023-11-12 02:28:06,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 54 transitions, 224 flow [2023-11-12 02:28:06,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:28:06,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:28:06,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 537 transitions. [2023-11-12 02:28:06,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4877384196185286 [2023-11-12 02:28:06,386 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 537 transitions. [2023-11-12 02:28:06,387 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 537 transitions. [2023-11-12 02:28:06,387 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:28:06,387 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 537 transitions. [2023-11-12 02:28:06,389 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:06,393 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 367.0) internal successors, (1468), 4 states have internal predecessors, (1468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:06,394 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 367.0) internal successors, (1468), 4 states have internal predecessors, (1468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:06,394 INFO L175 Difference]: Start difference. First operand has 45 places, 57 transitions, 130 flow. Second operand 3 states and 537 transitions. [2023-11-12 02:28:06,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 54 transitions, 224 flow [2023-11-12 02:28:06,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 54 transitions, 224 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-12 02:28:06,398 INFO L231 Difference]: Finished difference. Result has 44 places, 41 transitions, 104 flow [2023-11-12 02:28:06,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=44, PETRI_TRANSITIONS=41} [2023-11-12 02:28:06,399 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, -1 predicate places. [2023-11-12 02:28:06,399 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 41 transitions, 104 flow [2023-11-12 02:28:06,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:06,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:28:06,400 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-12 02:28:06,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-12 02:28:06,401 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-12 02:28:06,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:28:06,401 INFO L85 PathProgramCache]: Analyzing trace with hash 31691, now seen corresponding path program 1 times [2023-11-12 02:28:06,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:28:06,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801906987] [2023-11-12 02:28:06,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:28:06,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:28:06,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:28:06,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:28:06,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:28:06,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801906987] [2023-11-12 02:28:06,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801906987] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:28:06,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:28:06,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:28:06,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377688019] [2023-11-12 02:28:06,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:28:06,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:28:06,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:28:06,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:28:06,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:28:06,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 367 [2023-11-12 02:28:06,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 41 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 157.66666666666666) internal successors, (473), 3 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:06,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:28:06,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 367 [2023-11-12 02:28:06,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:28:06,930 INFO L124 PetriNetUnfolderBase]: 1893/3088 cut-off events. [2023-11-12 02:28:06,931 INFO L125 PetriNetUnfolderBase]: For 93/93 co-relation queries the response was YES. [2023-11-12 02:28:06,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6320 conditions, 3088 events. 1893/3088 cut-off events. For 93/93 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 16080 event pairs, 804 based on Foata normal form. 0/2272 useless extension candidates. Maximal degree in co-relation 5440. Up to 3030 conditions per place. [2023-11-12 02:28:06,952 INFO L140 encePairwiseOnDemand]: 363/367 looper letters, 44 selfloop transitions, 2 changer transitions 0/50 dead transitions. [2023-11-12 02:28:06,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 50 transitions, 214 flow [2023-11-12 02:28:06,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:28:06,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:28:06,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 519 transitions. [2023-11-12 02:28:06,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4713896457765668 [2023-11-12 02:28:06,958 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 519 transitions. [2023-11-12 02:28:06,958 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 519 transitions. [2023-11-12 02:28:06,958 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:28:06,958 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 519 transitions. [2023-11-12 02:28:06,960 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 173.0) internal successors, (519), 3 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:06,963 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 367.0) internal successors, (1468), 4 states have internal predecessors, (1468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:06,968 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 367.0) internal successors, (1468), 4 states have internal predecessors, (1468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:06,969 INFO L175 Difference]: Start difference. First operand has 44 places, 41 transitions, 104 flow. Second operand 3 states and 519 transitions. [2023-11-12 02:28:06,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 50 transitions, 214 flow [2023-11-12 02:28:06,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 50 transitions, 208 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-12 02:28:06,974 INFO L231 Difference]: Finished difference. Result has 45 places, 42 transitions, 112 flow [2023-11-12 02:28:06,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=45, PETRI_TRANSITIONS=42} [2023-11-12 02:28:06,976 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 0 predicate places. [2023-11-12 02:28:06,977 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 42 transitions, 112 flow [2023-11-12 02:28:06,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 157.66666666666666) internal successors, (473), 3 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:06,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:28:06,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-12 02:28:06,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-12 02:28:06,978 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-12 02:28:06,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:28:06,979 INFO L85 PathProgramCache]: Analyzing trace with hash -775528259, now seen corresponding path program 1 times [2023-11-12 02:28:06,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:28:06,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589561884] [2023-11-12 02:28:06,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:28:06,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:28:06,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:28:07,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:28:07,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:28:07,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589561884] [2023-11-12 02:28:07,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589561884] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:28:07,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:28:07,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:28:07,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910511918] [2023-11-12 02:28:07,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:28:07,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:28:07,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:28:07,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:28:07,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:28:07,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 367 [2023-11-12 02:28:07,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 42 transitions, 112 flow. Second operand has 4 states, 4 states have (on average 157.25) internal successors, (629), 4 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:07,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:28:07,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 367 [2023-11-12 02:28:07,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:28:07,530 INFO L124 PetriNetUnfolderBase]: 1789/2968 cut-off events. [2023-11-12 02:28:07,530 INFO L125 PetriNetUnfolderBase]: For 145/145 co-relation queries the response was YES. [2023-11-12 02:28:07,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6025 conditions, 2968 events. 1789/2968 cut-off events. For 145/145 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 16394 event pairs, 96 based on Foata normal form. 0/2232 useless extension candidates. Maximal degree in co-relation 1266. Up to 2421 conditions per place. [2023-11-12 02:28:07,552 INFO L140 encePairwiseOnDemand]: 363/367 looper letters, 55 selfloop transitions, 3 changer transitions 0/62 dead transitions. [2023-11-12 02:28:07,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 62 transitions, 266 flow [2023-11-12 02:28:07,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:28:07,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-12 02:28:07,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 683 transitions. [2023-11-12 02:28:07,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4652588555858311 [2023-11-12 02:28:07,556 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 683 transitions. [2023-11-12 02:28:07,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 683 transitions. [2023-11-12 02:28:07,557 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:28:07,557 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 683 transitions. [2023-11-12 02:28:07,560 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 170.75) internal successors, (683), 4 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:07,563 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 367.0) internal successors, (1835), 5 states have internal predecessors, (1835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:07,564 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 367.0) internal successors, (1835), 5 states have internal predecessors, (1835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:07,564 INFO L175 Difference]: Start difference. First operand has 45 places, 42 transitions, 112 flow. Second operand 4 states and 683 transitions. [2023-11-12 02:28:07,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 62 transitions, 266 flow [2023-11-12 02:28:07,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 62 transitions, 264 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:28:07,569 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 112 flow [2023-11-12 02:28:07,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=112, PETRI_PLACES=46, PETRI_TRANSITIONS=41} [2023-11-12 02:28:07,571 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 1 predicate places. [2023-11-12 02:28:07,572 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 112 flow [2023-11-12 02:28:07,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 157.25) internal successors, (629), 4 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:07,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:28:07,572 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-12 02:28:07,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-12 02:28:07,573 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-12 02:28:07,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:28:07,573 INFO L85 PathProgramCache]: Analyzing trace with hash -775274243, now seen corresponding path program 1 times [2023-11-12 02:28:07,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:28:07,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264278704] [2023-11-12 02:28:07,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:28:07,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:28:07,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:28:07,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:28:07,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:28:07,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264278704] [2023-11-12 02:28:07,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264278704] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:28:07,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:28:07,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:28:07,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243623547] [2023-11-12 02:28:07,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:28:07,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:28:07,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:28:07,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:28:07,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:28:07,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 367 [2023-11-12 02:28:07,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:07,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:28:07,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 367 [2023-11-12 02:28:07,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:28:08,191 INFO L124 PetriNetUnfolderBase]: 2581/4374 cut-off events. [2023-11-12 02:28:08,192 INFO L125 PetriNetUnfolderBase]: For 227/227 co-relation queries the response was YES. [2023-11-12 02:28:08,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8834 conditions, 4374 events. 2581/4374 cut-off events. For 227/227 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 24216 event pairs, 1160 based on Foata normal form. 0/3418 useless extension candidates. Maximal degree in co-relation 3044. Up to 2232 conditions per place. [2023-11-12 02:28:08,225 INFO L140 encePairwiseOnDemand]: 359/367 looper letters, 59 selfloop transitions, 5 changer transitions 0/68 dead transitions. [2023-11-12 02:28:08,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 68 transitions, 300 flow [2023-11-12 02:28:08,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:28:08,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:28:08,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 549 transitions. [2023-11-12 02:28:08,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4986376021798365 [2023-11-12 02:28:08,229 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 549 transitions. [2023-11-12 02:28:08,229 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 549 transitions. [2023-11-12 02:28:08,230 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:28:08,230 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 549 transitions. [2023-11-12 02:28:08,232 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 183.0) internal successors, (549), 3 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:08,237 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 367.0) internal successors, (1468), 4 states have internal predecessors, (1468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:08,238 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 367.0) internal successors, (1468), 4 states have internal predecessors, (1468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:08,239 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 112 flow. Second operand 3 states and 549 transitions. [2023-11-12 02:28:08,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 68 transitions, 300 flow [2023-11-12 02:28:08,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 68 transitions, 296 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-12 02:28:08,243 INFO L231 Difference]: Finished difference. Result has 48 places, 45 transitions, 150 flow [2023-11-12 02:28:08,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=48, PETRI_TRANSITIONS=45} [2023-11-12 02:28:08,246 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 3 predicate places. [2023-11-12 02:28:08,246 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 45 transitions, 150 flow [2023-11-12 02:28:08,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:08,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:28:08,248 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:28:08,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-12 02:28:08,248 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-12 02:28:08,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:28:08,249 INFO L85 PathProgramCache]: Analyzing trace with hash 2041695596, now seen corresponding path program 1 times [2023-11-12 02:28:08,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:28:08,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813903948] [2023-11-12 02:28:08,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:28:08,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:28:08,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:28:08,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:28:08,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:28:08,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813903948] [2023-11-12 02:28:08,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813903948] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:28:08,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808638401] [2023-11-12 02:28:08,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:28:08,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:28:08,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b894fc99-9e5a-4ad3-bd29-4ad4e2fa4226/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:28:08,309 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b894fc99-9e5a-4ad3-bd29-4ad4e2fa4226/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:28:08,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b894fc99-9e5a-4ad3-bd29-4ad4e2fa4226/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:28:08,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:28:08,400 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 02:28:08,402 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:28:08,413 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:28:08,414 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:28:08,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808638401] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:28:08,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:28:08,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-12 02:28:08,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266038395] [2023-11-12 02:28:08,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:28:08,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:28:08,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:28:08,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:28:08,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:28:08,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 367 [2023-11-12 02:28:08,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 45 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 160.33333333333334) internal successors, (481), 3 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:08,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:28:08,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 367 [2023-11-12 02:28:08,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:28:09,133 INFO L124 PetriNetUnfolderBase]: 3588/6053 cut-off events. [2023-11-12 02:28:09,133 INFO L125 PetriNetUnfolderBase]: For 1548/1548 co-relation queries the response was YES. [2023-11-12 02:28:09,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13934 conditions, 6053 events. 3588/6053 cut-off events. For 1548/1548 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 36750 event pairs, 2152 based on Foata normal form. 0/5237 useless extension candidates. Maximal degree in co-relation 5015. Up to 4370 conditions per place. [2023-11-12 02:28:09,179 INFO L140 encePairwiseOnDemand]: 363/367 looper letters, 63 selfloop transitions, 3 changer transitions 0/70 dead transitions. [2023-11-12 02:28:09,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 70 transitions, 360 flow [2023-11-12 02:28:09,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:28:09,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:28:09,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 533 transitions. [2023-11-12 02:28:09,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4841053587647593 [2023-11-12 02:28:09,183 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 533 transitions. [2023-11-12 02:28:09,183 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 533 transitions. [2023-11-12 02:28:09,183 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:28:09,184 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 533 transitions. [2023-11-12 02:28:09,185 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 177.66666666666666) internal successors, (533), 3 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:09,188 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 367.0) internal successors, (1468), 4 states have internal predecessors, (1468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:09,189 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 367.0) internal successors, (1468), 4 states have internal predecessors, (1468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:09,189 INFO L175 Difference]: Start difference. First operand has 48 places, 45 transitions, 150 flow. Second operand 3 states and 533 transitions. [2023-11-12 02:28:09,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 70 transitions, 360 flow [2023-11-12 02:28:09,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 70 transitions, 342 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-12 02:28:09,199 INFO L231 Difference]: Finished difference. Result has 49 places, 47 transitions, 159 flow [2023-11-12 02:28:09,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=159, PETRI_PLACES=49, PETRI_TRANSITIONS=47} [2023-11-12 02:28:09,200 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 4 predicate places. [2023-11-12 02:28:09,200 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 47 transitions, 159 flow [2023-11-12 02:28:09,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 160.33333333333334) internal successors, (481), 3 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:09,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:28:09,201 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:28:09,209 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b894fc99-9e5a-4ad3-bd29-4ad4e2fa4226/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-12 02:28:09,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b894fc99-9e5a-4ad3-bd29-4ad4e2fa4226/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:28:09,408 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-12 02:28:09,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:28:09,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1131922968, now seen corresponding path program 1 times [2023-11-12 02:28:09,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:28:09,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643668976] [2023-11-12 02:28:09,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:28:09,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:28:09,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:28:09,461 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:28:09,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:28:09,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643668976] [2023-11-12 02:28:09,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643668976] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:28:09,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574100754] [2023-11-12 02:28:09,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:28:09,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:28:09,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b894fc99-9e5a-4ad3-bd29-4ad4e2fa4226/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:28:09,463 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b894fc99-9e5a-4ad3-bd29-4ad4e2fa4226/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:28:09,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b894fc99-9e5a-4ad3-bd29-4ad4e2fa4226/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:28:09,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:28:09,559 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 02:28:09,559 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:28:09,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:28:09,567 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:28:09,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574100754] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:28:09,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:28:09,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-11-12 02:28:09,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357364477] [2023-11-12 02:28:09,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:28:09,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:28:09,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:28:09,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:28:09,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:28:09,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 367 [2023-11-12 02:28:09,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 47 transitions, 159 flow. Second operand has 3 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:09,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:28:09,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 367 [2023-11-12 02:28:09,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:28:10,305 INFO L124 PetriNetUnfolderBase]: 3286/5569 cut-off events. [2023-11-12 02:28:10,305 INFO L125 PetriNetUnfolderBase]: For 1085/1085 co-relation queries the response was YES. [2023-11-12 02:28:10,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13105 conditions, 5569 events. 3286/5569 cut-off events. For 1085/1085 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 33382 event pairs, 2226 based on Foata normal form. 0/4829 useless extension candidates. Maximal degree in co-relation 4639. Up to 4530 conditions per place. [2023-11-12 02:28:10,348 INFO L140 encePairwiseOnDemand]: 363/367 looper letters, 61 selfloop transitions, 2 changer transitions 0/67 dead transitions. [2023-11-12 02:28:10,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 67 transitions, 345 flow [2023-11-12 02:28:10,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:28:10,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:28:10,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 530 transitions. [2023-11-12 02:28:10,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48138056312443234 [2023-11-12 02:28:10,352 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 530 transitions. [2023-11-12 02:28:10,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 530 transitions. [2023-11-12 02:28:10,353 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:28:10,353 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 530 transitions. [2023-11-12 02:28:10,355 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 176.66666666666666) internal successors, (530), 3 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:10,359 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 367.0) internal successors, (1468), 4 states have internal predecessors, (1468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:10,359 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 367.0) internal successors, (1468), 4 states have internal predecessors, (1468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:10,360 INFO L175 Difference]: Start difference. First operand has 49 places, 47 transitions, 159 flow. Second operand 3 states and 530 transitions. [2023-11-12 02:28:10,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 67 transitions, 345 flow [2023-11-12 02:28:10,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 67 transitions, 342 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:28:10,364 INFO L231 Difference]: Finished difference. Result has 51 places, 48 transitions, 170 flow [2023-11-12 02:28:10,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=170, PETRI_PLACES=51, PETRI_TRANSITIONS=48} [2023-11-12 02:28:10,366 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 6 predicate places. [2023-11-12 02:28:10,366 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 48 transitions, 170 flow [2023-11-12 02:28:10,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:10,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:28:10,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:28:10,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b894fc99-9e5a-4ad3-bd29-4ad4e2fa4226/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 02:28:10,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b894fc99-9e5a-4ad3-bd29-4ad4e2fa4226/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-12 02:28:10,574 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-12 02:28:10,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:28:10,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1131923066, now seen corresponding path program 1 times [2023-11-12 02:28:10,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:28:10,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518364457] [2023-11-12 02:28:10,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:28:10,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:28:10,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:28:10,633 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:28:10,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:28:10,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518364457] [2023-11-12 02:28:10,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518364457] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:28:10,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017512982] [2023-11-12 02:28:10,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:28:10,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:28:10,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b894fc99-9e5a-4ad3-bd29-4ad4e2fa4226/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:28:10,637 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b894fc99-9e5a-4ad3-bd29-4ad4e2fa4226/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:28:10,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b894fc99-9e5a-4ad3-bd29-4ad4e2fa4226/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:28:10,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:28:10,732 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 02:28:10,734 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:28:10,752 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:28:10,753 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:28:10,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:28:10,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017512982] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:28:10,775 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:28:10,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-11-12 02:28:10,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102953163] [2023-11-12 02:28:10,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:28:10,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:28:10,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:28:10,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:28:10,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:28:10,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 367 [2023-11-12 02:28:10,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 48 transitions, 170 flow. Second operand has 6 states, 6 states have (on average 159.16666666666666) internal successors, (955), 6 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:10,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:28:10,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 367 [2023-11-12 02:28:10,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:28:10,912 INFO L124 PetriNetUnfolderBase]: 160/331 cut-off events. [2023-11-12 02:28:10,912 INFO L125 PetriNetUnfolderBase]: For 151/151 co-relation queries the response was YES. [2023-11-12 02:28:10,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 737 conditions, 331 events. 160/331 cut-off events. For 151/151 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1315 event pairs, 0 based on Foata normal form. 42/373 useless extension candidates. Maximal degree in co-relation 728. Up to 192 conditions per place. [2023-11-12 02:28:10,915 INFO L140 encePairwiseOnDemand]: 364/367 looper letters, 30 selfloop transitions, 3 changer transitions 0/35 dead transitions. [2023-11-12 02:28:10,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 35 transitions, 165 flow [2023-11-12 02:28:10,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:28:10,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:28:10,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 820 transitions. [2023-11-12 02:28:10,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44686648501362397 [2023-11-12 02:28:10,920 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 820 transitions. [2023-11-12 02:28:10,921 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 820 transitions. [2023-11-12 02:28:10,922 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:28:10,922 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 820 transitions. [2023-11-12 02:28:10,925 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 164.0) internal successors, (820), 5 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:10,929 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 367.0) internal successors, (2202), 6 states have internal predecessors, (2202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:10,930 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 367.0) internal successors, (2202), 6 states have internal predecessors, (2202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:10,931 INFO L175 Difference]: Start difference. First operand has 51 places, 48 transitions, 170 flow. Second operand 5 states and 820 transitions. [2023-11-12 02:28:10,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 35 transitions, 165 flow [2023-11-12 02:28:10,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 35 transitions, 164 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:28:10,932 INFO L231 Difference]: Finished difference. Result has 33 places, 18 transitions, 64 flow [2023-11-12 02:28:10,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=64, PETRI_PLACES=33, PETRI_TRANSITIONS=18} [2023-11-12 02:28:10,934 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, -12 predicate places. [2023-11-12 02:28:10,934 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 18 transitions, 64 flow [2023-11-12 02:28:10,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 159.16666666666666) internal successors, (955), 6 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:10,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:28:10,935 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-12 02:28:10,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b894fc99-9e5a-4ad3-bd29-4ad4e2fa4226/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 02:28:11,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b894fc99-9e5a-4ad3-bd29-4ad4e2fa4226/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:28:11,141 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-12 02:28:11,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:28:11,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1773063299, now seen corresponding path program 1 times [2023-11-12 02:28:11,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:28:11,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567348956] [2023-11-12 02:28:11,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:28:11,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:28:11,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:28:11,173 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-12 02:28:11,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:28:11,201 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-12 02:28:11,202 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-12 02:28:11,203 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 9 remaining) [2023-11-12 02:28:11,203 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 9 remaining) [2023-11-12 02:28:11,203 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 9 remaining) [2023-11-12 02:28:11,204 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 9 remaining) [2023-11-12 02:28:11,204 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 9 remaining) [2023-11-12 02:28:11,204 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (3 of 9 remaining) [2023-11-12 02:28:11,204 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (2 of 9 remaining) [2023-11-12 02:28:11,204 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (1 of 9 remaining) [2023-11-12 02:28:11,205 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 9 remaining) [2023-11-12 02:28:11,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-12 02:28:11,205 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:28:11,206 WARN L234 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-12 02:28:11,206 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-12 02:28:11,248 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-12 02:28:11,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 197 places, 216 transitions, 459 flow [2023-11-12 02:28:11,362 INFO L124 PetriNetUnfolderBase]: 68/581 cut-off events. [2023-11-12 02:28:11,362 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-12 02:28:11,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 606 conditions, 581 events. 68/581 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2538 event pairs, 1 based on Foata normal form. 0/474 useless extension candidates. Maximal degree in co-relation 398. Up to 16 conditions per place. [2023-11-12 02:28:11,368 INFO L82 GeneralOperation]: Start removeDead. Operand has 197 places, 216 transitions, 459 flow [2023-11-12 02:28:11,373 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 197 places, 216 transitions, 459 flow [2023-11-12 02:28:11,373 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:28:11,374 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 197 places, 216 transitions, 459 flow [2023-11-12 02:28:11,374 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 197 places, 216 transitions, 459 flow [2023-11-12 02:28:11,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 197 places, 216 transitions, 459 flow [2023-11-12 02:28:11,471 INFO L124 PetriNetUnfolderBase]: 68/581 cut-off events. [2023-11-12 02:28:11,471 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-12 02:28:11,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 606 conditions, 581 events. 68/581 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2538 event pairs, 1 based on Foata normal form. 0/474 useless extension candidates. Maximal degree in co-relation 398. Up to 16 conditions per place. [2023-11-12 02:28:11,502 INFO L119 LiptonReduction]: Number of co-enabled transitions 20412 [2023-11-12 02:28:16,850 INFO L134 LiptonReduction]: Checked pairs total: 30716 [2023-11-12 02:28:16,850 INFO L136 LiptonReduction]: Total number of compositions: 205 [2023-11-12 02:28:16,852 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:28:16,853 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;@22b6e0d7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:28:16,853 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2023-11-12 02:28:16,854 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:28:16,855 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-11-12 02:28:16,855 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:28:16,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:28:16,855 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-12 02:28:16,855 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-11-12 02:28:16,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:28:16,856 INFO L85 PathProgramCache]: Analyzing trace with hash 46086, now seen corresponding path program 1 times [2023-11-12 02:28:16,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:28:16,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885863511] [2023-11-12 02:28:16,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:28:16,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:28:16,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:28:16,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:28:16,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:28:16,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885863511] [2023-11-12 02:28:16,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885863511] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:28:16,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:28:16,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:28:16,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650246925] [2023-11-12 02:28:16,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:28:16,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:28:16,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:28:16,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:28:16,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:28:16,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 421 [2023-11-12 02:28:16,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 66 transitions, 159 flow. Second operand has 3 states, 3 states have (on average 177.66666666666666) internal successors, (533), 3 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:16,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:28:16,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 421 [2023-11-12 02:28:16,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:28:19,352 INFO L124 PetriNetUnfolderBase]: 15582/22422 cut-off events. [2023-11-12 02:28:19,352 INFO L125 PetriNetUnfolderBase]: For 670/670 co-relation queries the response was YES. [2023-11-12 02:28:19,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44897 conditions, 22422 events. 15582/22422 cut-off events. For 670/670 co-relation queries the response was YES. Maximal size of possible extension queue 956. Compared 146796 event pairs, 12845 based on Foata normal form. 3115/19214 useless extension candidates. Maximal degree in co-relation 4757. Up to 19223 conditions per place. [2023-11-12 02:28:19,511 INFO L140 encePairwiseOnDemand]: 402/421 looper letters, 57 selfloop transitions, 3 changer transitions 0/66 dead transitions. [2023-11-12 02:28:19,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 66 transitions, 279 flow [2023-11-12 02:28:19,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:28:19,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:28:19,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 615 transitions. [2023-11-12 02:28:19,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48693586698337293 [2023-11-12 02:28:19,515 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 615 transitions. [2023-11-12 02:28:19,515 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 615 transitions. [2023-11-12 02:28:19,516 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:28:19,516 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 615 transitions. [2023-11-12 02:28:19,518 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 205.0) internal successors, (615), 3 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:19,521 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 421.0) internal successors, (1684), 4 states have internal predecessors, (1684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:19,523 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 421.0) internal successors, (1684), 4 states have internal predecessors, (1684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:19,524 INFO L175 Difference]: Start difference. First operand has 54 places, 66 transitions, 159 flow. Second operand 3 states and 615 transitions. [2023-11-12 02:28:19,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 66 transitions, 279 flow [2023-11-12 02:28:19,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 66 transitions, 279 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-12 02:28:19,529 INFO L231 Difference]: Finished difference. Result has 53 places, 49 transitions, 131 flow [2023-11-12 02:28:19,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=421, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=53, PETRI_TRANSITIONS=49} [2023-11-12 02:28:19,530 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -1 predicate places. [2023-11-12 02:28:19,530 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 49 transitions, 131 flow [2023-11-12 02:28:19,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 177.66666666666666) internal successors, (533), 3 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:19,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:28:19,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-12 02:28:19,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-12 02:28:19,531 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-11-12 02:28:19,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:28:19,532 INFO L85 PathProgramCache]: Analyzing trace with hash 46087, now seen corresponding path program 1 times [2023-11-12 02:28:19,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:28:19,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971815821] [2023-11-12 02:28:19,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:28:19,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:28:19,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:28:19,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:28:19,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:28:19,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971815821] [2023-11-12 02:28:19,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971815821] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:28:19,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:28:19,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:28:19,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044414680] [2023-11-12 02:28:19,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:28:19,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:28:19,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:28:19,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:28:19,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:28:19,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 421 [2023-11-12 02:28:19,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 49 transitions, 131 flow. Second operand has 3 states, 3 states have (on average 179.66666666666666) internal successors, (539), 3 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:19,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:28:19,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 421 [2023-11-12 02:28:19,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:28:21,950 INFO L124 PetriNetUnfolderBase]: 15579/22396 cut-off events. [2023-11-12 02:28:21,951 INFO L125 PetriNetUnfolderBase]: For 965/965 co-relation queries the response was YES. [2023-11-12 02:28:21,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45757 conditions, 22396 events. 15579/22396 cut-off events. For 965/965 co-relation queries the response was YES. Maximal size of possible extension queue 929. Compared 142481 event pairs, 9543 based on Foata normal form. 0/16518 useless extension candidates. Maximal degree in co-relation 39092. Up to 22083 conditions per place. [2023-11-12 02:28:22,124 INFO L140 encePairwiseOnDemand]: 417/421 looper letters, 49 selfloop transitions, 2 changer transitions 0/57 dead transitions. [2023-11-12 02:28:22,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 57 transitions, 249 flow [2023-11-12 02:28:22,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:28:22,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:28:22,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 590 transitions. [2023-11-12 02:28:22,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4671417260490895 [2023-11-12 02:28:22,129 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 590 transitions. [2023-11-12 02:28:22,129 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 590 transitions. [2023-11-12 02:28:22,130 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:28:22,130 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 590 transitions. [2023-11-12 02:28:22,133 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 196.66666666666666) internal successors, (590), 3 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:22,137 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 421.0) internal successors, (1684), 4 states have internal predecessors, (1684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:22,138 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 421.0) internal successors, (1684), 4 states have internal predecessors, (1684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:22,138 INFO L175 Difference]: Start difference. First operand has 53 places, 49 transitions, 131 flow. Second operand 3 states and 590 transitions. [2023-11-12 02:28:22,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 57 transitions, 249 flow [2023-11-12 02:28:22,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 57 transitions, 243 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-12 02:28:22,200 INFO L231 Difference]: Finished difference. Result has 54 places, 50 transitions, 139 flow [2023-11-12 02:28:22,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=421, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=139, PETRI_PLACES=54, PETRI_TRANSITIONS=50} [2023-11-12 02:28:22,202 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 0 predicate places. [2023-11-12 02:28:22,202 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 50 transitions, 139 flow [2023-11-12 02:28:22,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 179.66666666666666) internal successors, (539), 3 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:22,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:28:22,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-12 02:28:22,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-12 02:28:22,204 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-11-12 02:28:22,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:28:22,204 INFO L85 PathProgramCache]: Analyzing trace with hash -352425875, now seen corresponding path program 1 times [2023-11-12 02:28:22,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:28:22,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556630993] [2023-11-12 02:28:22,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:28:22,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:28:22,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:28:22,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:28:22,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:28:22,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556630993] [2023-11-12 02:28:22,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556630993] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:28:22,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137681218] [2023-11-12 02:28:22,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:28:22,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:28:22,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b894fc99-9e5a-4ad3-bd29-4ad4e2fa4226/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:28:22,327 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b894fc99-9e5a-4ad3-bd29-4ad4e2fa4226/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:28:22,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b894fc99-9e5a-4ad3-bd29-4ad4e2fa4226/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 02:28:22,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:28:22,417 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-12 02:28:22,418 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:28:22,438 INFO L351 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 [2023-11-12 02:28:22,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:28:22,495 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:28:22,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:28:22,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137681218] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:28:22,553 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:28:22,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-11-12 02:28:22,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546938413] [2023-11-12 02:28:22,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:28:22,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 02:28:22,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:28:22,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 02:28:22,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:28:22,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 421 [2023-11-12 02:28:22,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 50 transitions, 139 flow. Second operand has 8 states, 8 states have (on average 176.875) internal successors, (1415), 8 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:22,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:28:22,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 421 [2023-11-12 02:28:22,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:28:23,394 INFO L124 PetriNetUnfolderBase]: 2185/3568 cut-off events. [2023-11-12 02:28:23,395 INFO L125 PetriNetUnfolderBase]: For 1358/1358 co-relation queries the response was YES. [2023-11-12 02:28:23,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7333 conditions, 3568 events. 2185/3568 cut-off events. For 1358/1358 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 22057 event pairs, 0 based on Foata normal form. 343/3323 useless extension candidates. Maximal degree in co-relation 1666. Up to 2086 conditions per place. [2023-11-12 02:28:23,416 INFO L140 encePairwiseOnDemand]: 417/421 looper letters, 58 selfloop transitions, 4 changer transitions 0/66 dead transitions. [2023-11-12 02:28:23,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 66 transitions, 284 flow [2023-11-12 02:28:23,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:28:23,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-12 02:28:23,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1118 transitions. [2023-11-12 02:28:23,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.442596991290578 [2023-11-12 02:28:23,422 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1118 transitions. [2023-11-12 02:28:23,422 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1118 transitions. [2023-11-12 02:28:23,423 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:28:23,423 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1118 transitions. [2023-11-12 02:28:23,427 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 186.33333333333334) internal successors, (1118), 6 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:23,433 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 421.0) internal successors, (2947), 7 states have internal predecessors, (2947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:23,434 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 421.0) internal successors, (2947), 7 states have internal predecessors, (2947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:23,435 INFO L175 Difference]: Start difference. First operand has 54 places, 50 transitions, 139 flow. Second operand 6 states and 1118 transitions. [2023-11-12 02:28:23,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 66 transitions, 284 flow [2023-11-12 02:28:23,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 66 transitions, 280 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-12 02:28:23,438 INFO L231 Difference]: Finished difference. Result has 41 places, 29 transitions, 90 flow [2023-11-12 02:28:23,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=421, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=90, PETRI_PLACES=41, PETRI_TRANSITIONS=29} [2023-11-12 02:28:23,439 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -13 predicate places. [2023-11-12 02:28:23,440 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 29 transitions, 90 flow [2023-11-12 02:28:23,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 176.875) internal successors, (1415), 8 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:23,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:28:23,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-12 02:28:23,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b894fc99-9e5a-4ad3-bd29-4ad4e2fa4226/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 02:28:23,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b894fc99-9e5a-4ad3-bd29-4ad4e2fa4226/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:28:23,646 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-11-12 02:28:23,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:28:23,647 INFO L85 PathProgramCache]: Analyzing trace with hash -352089603, now seen corresponding path program 1 times [2023-11-12 02:28:23,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:28:23,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541129159] [2023-11-12 02:28:23,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:28:23,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:28:23,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:28:23,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:28:23,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:28:23,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541129159] [2023-11-12 02:28:23,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541129159] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:28:23,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:28:23,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:28:23,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086921317] [2023-11-12 02:28:23,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:28:23,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:28:23,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:28:23,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:28:23,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:28:23,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 421 [2023-11-12 02:28:23,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 29 transitions, 90 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) [2023-11-12 02:28:23,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:28:23,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 421 [2023-11-12 02:28:23,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:28:23,923 INFO L124 PetriNetUnfolderBase]: 1078/1669 cut-off events. [2023-11-12 02:28:23,924 INFO L125 PetriNetUnfolderBase]: For 667/667 co-relation queries the response was YES. [2023-11-12 02:28:23,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3750 conditions, 1669 events. 1078/1669 cut-off events. For 667/667 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 7966 event pairs, 1078 based on Foata normal form. 0/1666 useless extension candidates. Maximal degree in co-relation 2095. Up to 1620 conditions per place. [2023-11-12 02:28:23,935 INFO L140 encePairwiseOnDemand]: 416/421 looper letters, 20 selfloop transitions, 1 changer transitions 0/25 dead transitions. [2023-11-12 02:28:23,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 25 transitions, 124 flow [2023-11-12 02:28:23,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:28:23,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:28:23,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 572 transitions. [2023-11-12 02:28:23,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45288994457640536 [2023-11-12 02:28:23,939 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 572 transitions. [2023-11-12 02:28:23,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 572 transitions. [2023-11-12 02:28:23,939 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:28:23,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 572 transitions. [2023-11-12 02:28:23,942 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 190.66666666666666) internal successors, (572), 3 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:23,944 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 421.0) internal successors, (1684), 4 states have internal predecessors, (1684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:23,946 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 421.0) internal successors, (1684), 4 states have internal predecessors, (1684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:23,946 INFO L175 Difference]: Start difference. First operand has 41 places, 29 transitions, 90 flow. Second operand 3 states and 572 transitions. [2023-11-12 02:28:23,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 25 transitions, 124 flow [2023-11-12 02:28:23,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 25 transitions, 115 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-11-12 02:28:23,948 INFO L231 Difference]: Finished difference. Result has 36 places, 25 transitions, 75 flow [2023-11-12 02:28:23,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=421, PETRI_DIFFERENCE_MINUEND_FLOW=73, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=75, PETRI_PLACES=36, PETRI_TRANSITIONS=25} [2023-11-12 02:28:23,949 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -18 predicate places. [2023-11-12 02:28:23,949 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 25 transitions, 75 flow [2023-11-12 02:28:23,949 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) [2023-11-12 02:28:23,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:28:23,950 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-11-12 02:28:23,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-12 02:28:23,950 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-11-12 02:28:23,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:28:23,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1696612700, now seen corresponding path program 1 times [2023-11-12 02:28:23,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:28:23,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222751932] [2023-11-12 02:28:23,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:28:23,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:28:23,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:28:23,976 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-12 02:28:23,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:28:24,000 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-12 02:28:24,000 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-12 02:28:24,000 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 10 remaining) [2023-11-12 02:28:24,001 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 10 remaining) [2023-11-12 02:28:24,001 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 10 remaining) [2023-11-12 02:28:24,001 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 10 remaining) [2023-11-12 02:28:24,001 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 10 remaining) [2023-11-12 02:28:24,001 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (4 of 10 remaining) [2023-11-12 02:28:24,002 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (3 of 10 remaining) [2023-11-12 02:28:24,002 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (2 of 10 remaining) [2023-11-12 02:28:24,002 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (1 of 10 remaining) [2023-11-12 02:28:24,002 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 10 remaining) [2023-11-12 02:28:24,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-12 02:28:24,003 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-11-12 02:28:24,003 WARN L234 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-12 02:28:24,003 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-12 02:28:24,035 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-12 02:28:24,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 223 places, 245 transitions, 530 flow [2023-11-12 02:28:24,166 INFO L124 PetriNetUnfolderBase]: 103/864 cut-off events. [2023-11-12 02:28:24,166 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-12 02:28:24,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 915 conditions, 864 events. 103/864 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 4172 event pairs, 6 based on Foata normal form. 0/699 useless extension candidates. Maximal degree in co-relation 601. Up to 32 conditions per place. [2023-11-12 02:28:24,177 INFO L82 GeneralOperation]: Start removeDead. Operand has 223 places, 245 transitions, 530 flow [2023-11-12 02:28:24,187 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 223 places, 245 transitions, 530 flow [2023-11-12 02:28:24,187 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:28:24,187 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 223 places, 245 transitions, 530 flow [2023-11-12 02:28:24,190 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 223 places, 245 transitions, 530 flow [2023-11-12 02:28:24,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 223 places, 245 transitions, 530 flow [2023-11-12 02:28:24,315 INFO L124 PetriNetUnfolderBase]: 103/864 cut-off events. [2023-11-12 02:28:24,316 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-12 02:28:24,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 915 conditions, 864 events. 103/864 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 4172 event pairs, 6 based on Foata normal form. 0/699 useless extension candidates. Maximal degree in co-relation 601. Up to 32 conditions per place. [2023-11-12 02:28:24,351 INFO L119 LiptonReduction]: Number of co-enabled transitions 30456 [2023-11-12 02:28:29,567 INFO L134 LiptonReduction]: Checked pairs total: 49516 [2023-11-12 02:28:29,567 INFO L136 LiptonReduction]: Total number of compositions: 242 [2023-11-12 02:28:29,569 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:28:29,569 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;@22b6e0d7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:28:29,570 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2023-11-12 02:28:29,571 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:28:29,571 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-12 02:28:29,571 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:28:29,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:28:29,572 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-12 02:28:29,572 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-12 02:28:29,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:28:29,572 INFO L85 PathProgramCache]: Analyzing trace with hash 62579, now seen corresponding path program 1 times [2023-11-12 02:28:29,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:28:29,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908313182] [2023-11-12 02:28:29,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:28:29,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:28:29,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:28:29,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:28:29,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:28:29,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908313182] [2023-11-12 02:28:29,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908313182] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:28:29,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:28:29,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:28:29,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815607672] [2023-11-12 02:28:29,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:28:29,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:28:29,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:28:29,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:28:29,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:28:29,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 487 [2023-11-12 02:28:29,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 78 transitions, 196 flow. Second operand has 3 states, 3 states have (on average 199.66666666666666) internal successors, (599), 3 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:29,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:28:29,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 487 [2023-11-12 02:28:29,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand