./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/parallel-barrier.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b84973-dce0-48e6-bbe7-601d7b70e7de/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b84973-dce0-48e6-bbe7-601d7b70e7de/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b84973-dce0-48e6-bbe7-601d7b70e7de/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b84973-dce0-48e6-bbe7-601d7b70e7de/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/parallel-barrier.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b84973-dce0-48e6-bbe7-601d7b70e7de/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b84973-dce0-48e6-bbe7-601d7b70e7de/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --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 22b51332425cd14048935a20a73abea0065b1633fac56d6d6be511ab67585236 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:10:29,673 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:10:29,778 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b84973-dce0-48e6-bbe7-601d7b70e7de/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-06 22:10:29,784 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:10:29,785 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:10:29,810 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:10:29,811 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:10:29,812 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:10:29,812 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:10:29,813 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:10:29,814 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:10:29,815 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:10:29,815 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:10:29,816 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:10:29,817 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:10:29,817 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:10:29,818 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:10:29,819 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:10:29,819 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 22:10:29,820 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 22:10:29,820 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 22:10:29,821 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:10:29,822 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 22:10:29,822 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 22:10:29,823 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:10:29,823 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:10:29,824 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:10:29,824 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:10:29,825 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:10:29,825 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:10:29,826 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:10:29,826 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:10:29,827 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:10:29,828 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:10:29,828 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:10:29,828 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:10:29,829 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:10:29,829 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:10:29,830 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_d8b84973-dce0-48e6-bbe7-601d7b70e7de/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b84973-dce0-48e6-bbe7-601d7b70e7de/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 22b51332425cd14048935a20a73abea0065b1633fac56d6d6be511ab67585236 [2023-11-06 22:10:30,091 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:10:30,114 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:10:30,117 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:10:30,118 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:10:30,118 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:10:30,120 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b84973-dce0-48e6-bbe7-601d7b70e7de/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/parallel-barrier.wvr.c [2023-11-06 22:10:33,373 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:10:33,599 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:10:33,599 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b84973-dce0-48e6-bbe7-601d7b70e7de/sv-benchmarks/c/weaver/parallel-barrier.wvr.c [2023-11-06 22:10:33,609 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b84973-dce0-48e6-bbe7-601d7b70e7de/bin/uautomizer-verify-WvqO1wxjHP/data/83d008177/329861789da041adae2ceb00fef2865e/FLAGc361409fd [2023-11-06 22:10:33,621 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b84973-dce0-48e6-bbe7-601d7b70e7de/bin/uautomizer-verify-WvqO1wxjHP/data/83d008177/329861789da041adae2ceb00fef2865e [2023-11-06 22:10:33,624 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:10:33,626 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:10:33,627 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:10:33,627 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:10:33,632 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:10:33,633 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:10:33" (1/1) ... [2023-11-06 22:10:33,634 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44cce79a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:33, skipping insertion in model container [2023-11-06 22:10:33,634 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:10:33" (1/1) ... [2023-11-06 22:10:33,665 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:10:33,897 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:10:33,910 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:10:33,948 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:10:33,959 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:10:33,959 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:10:33,968 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:10:33,969 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:33 WrapperNode [2023-11-06 22:10:33,969 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:10:33,971 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:10:33,971 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:10:33,971 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:10:33,981 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:33" (1/1) ... [2023-11-06 22:10:33,992 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:33" (1/1) ... [2023-11-06 22:10:34,030 INFO L138 Inliner]: procedures = 25, calls = 99, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 266 [2023-11-06 22:10:34,031 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:10:34,032 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:10:34,032 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:10:34,032 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:10:34,043 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:33" (1/1) ... [2023-11-06 22:10:34,043 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:33" (1/1) ... [2023-11-06 22:10:34,048 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:33" (1/1) ... [2023-11-06 22:10:34,048 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:33" (1/1) ... [2023-11-06 22:10:34,058 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:33" (1/1) ... [2023-11-06 22:10:34,061 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:33" (1/1) ... [2023-11-06 22:10:34,063 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:33" (1/1) ... [2023-11-06 22:10:34,065 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:33" (1/1) ... [2023-11-06 22:10:34,070 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:10:34,071 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:10:34,071 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:10:34,071 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:10:34,072 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:33" (1/1) ... [2023-11-06 22:10:34,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:10:34,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b84973-dce0-48e6-bbe7-601d7b70e7de/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:10:34,114 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b84973-dce0-48e6-bbe7-601d7b70e7de/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:10:34,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b84973-dce0-48e6-bbe7-601d7b70e7de/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:10:34,147 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:10:34,147 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:10:34,147 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:10:34,148 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:10:34,148 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 22:10:34,148 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 22:10:34,148 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 22:10:34,148 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 22:10:34,149 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-06 22:10:34,149 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-06 22:10:34,149 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-11-06 22:10:34,149 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-11-06 22:10:34,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:10:34,150 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2023-11-06 22:10:34,150 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2023-11-06 22:10:34,150 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2023-11-06 22:10:34,150 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2023-11-06 22:10:34,151 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-06 22:10:34,151 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-06 22:10:34,151 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:10:34,151 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:10:34,151 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:10:34,153 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 22:10:34,293 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:10:34,295 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:10:34,831 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:10:34,951 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:10:34,951 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-06 22:10:34,955 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:10:34 BoogieIcfgContainer [2023-11-06 22:10:34,955 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:10:34,960 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:10:34,961 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:10:34,965 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:10:34,965 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:10:33" (1/3) ... [2023-11-06 22:10:34,966 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@447974ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:10:34, skipping insertion in model container [2023-11-06 22:10:34,968 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:33" (2/3) ... [2023-11-06 22:10:34,970 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@447974ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:10:34, skipping insertion in model container [2023-11-06 22:10:34,971 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:10:34" (3/3) ... [2023-11-06 22:10:34,972 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-barrier.wvr.c [2023-11-06 22:10:34,993 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:10:34,993 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2023-11-06 22:10:34,994 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:10:35,202 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-11-06 22:10:35,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 289 places, 278 transitions, 622 flow [2023-11-06 22:10:35,392 INFO L124 PetriNetUnfolderBase]: 8/246 cut-off events. [2023-11-06 22:10:35,392 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-06 22:10:35,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 275 conditions, 246 events. 8/246 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 357 event pairs, 0 based on Foata normal form. 0/212 useless extension candidates. Maximal degree in co-relation 206. Up to 3 conditions per place. [2023-11-06 22:10:35,404 INFO L82 GeneralOperation]: Start removeDead. Operand has 289 places, 278 transitions, 622 flow [2023-11-06 22:10:35,419 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 252 places, 241 transitions, 530 flow [2023-11-06 22:10:35,423 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:10:35,441 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 252 places, 241 transitions, 530 flow [2023-11-06 22:10:35,445 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 252 places, 241 transitions, 530 flow [2023-11-06 22:10:35,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 252 places, 241 transitions, 530 flow [2023-11-06 22:10:35,522 INFO L124 PetriNetUnfolderBase]: 8/241 cut-off events. [2023-11-06 22:10:35,522 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-06 22:10:35,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 270 conditions, 241 events. 8/241 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 355 event pairs, 0 based on Foata normal form. 0/208 useless extension candidates. Maximal degree in co-relation 206. Up to 3 conditions per place. [2023-11-06 22:10:35,535 INFO L119 LiptonReduction]: Number of co-enabled transitions 10984 [2023-11-06 22:10:42,062 INFO L134 LiptonReduction]: Checked pairs total: 79423 [2023-11-06 22:10:42,062 INFO L136 LiptonReduction]: Total number of compositions: 174 [2023-11-06 22:10:42,079 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:10:42,086 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;@7ca1e996, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:10:42,086 INFO L358 AbstractCegarLoop]: Starting to check reachability of 52 error locations. [2023-11-06 22:10:42,089 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:10:42,090 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-11-06 22:10:42,090 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:10:42,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:10:42,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-11-06 22:10:42,091 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-06 22:10:42,096 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:10:42,097 INFO L85 PathProgramCache]: Analyzing trace with hash 931, now seen corresponding path program 1 times [2023-11-06 22:10:42,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:10:42,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295530688] [2023-11-06 22:10:42,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:10:42,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:10:42,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:10:42,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:10:42,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:10:42,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295530688] [2023-11-06 22:10:42,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295530688] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:10:42,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:10:42,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-11-06 22:10:42,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987472006] [2023-11-06 22:10:42,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:10:42,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 22:10:42,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:10:42,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 22:10:42,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:10:42,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 249 out of 456 [2023-11-06 22:10:42,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 102 transitions, 252 flow. Second operand has 2 states, 2 states have (on average 249.5) internal successors, (499), 2 states have internal predecessors, (499), 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) [2023-11-06 22:10:42,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:10:42,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 249 of 456 [2023-11-06 22:10:42,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:10:50,804 INFO L124 PetriNetUnfolderBase]: 38800/57066 cut-off events. [2023-11-06 22:10:50,804 INFO L125 PetriNetUnfolderBase]: For 5205/5205 co-relation queries the response was YES. [2023-11-06 22:10:51,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113367 conditions, 57066 events. 38800/57066 cut-off events. For 5205/5205 co-relation queries the response was YES. Maximal size of possible extension queue 2106. Compared 435776 event pairs, 37144 based on Foata normal form. 0/35219 useless extension candidates. Maximal degree in co-relation 112025. Up to 49514 conditions per place. [2023-11-06 22:10:51,502 INFO L140 encePairwiseOnDemand]: 452/456 looper letters, 49 selfloop transitions, 0 changer transitions 0/97 dead transitions. [2023-11-06 22:10:51,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 97 transitions, 340 flow [2023-11-06 22:10:51,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 22:10:51,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-06 22:10:51,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 551 transitions. [2023-11-06 22:10:51,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2023-11-06 22:10:51,528 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 551 transitions. [2023-11-06 22:10:51,529 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 551 transitions. [2023-11-06 22:10:51,533 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:10:51,536 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 551 transitions. [2023-11-06 22:10:51,544 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 275.5) internal successors, (551), 2 states have internal predecessors, (551), 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) [2023-11-06 22:10:51,552 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 456.0) internal successors, (1368), 3 states have internal predecessors, (1368), 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) [2023-11-06 22:10:51,554 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 456.0) internal successors, (1368), 3 states have internal predecessors, (1368), 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) [2023-11-06 22:10:51,556 INFO L175 Difference]: Start difference. First operand has 116 places, 102 transitions, 252 flow. Second operand 2 states and 551 transitions. [2023-11-06 22:10:51,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 97 transitions, 340 flow [2023-11-06 22:10:51,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 97 transitions, 308 flow, removed 0 selfloop flow, removed 12 redundant places. [2023-11-06 22:10:51,677 INFO L231 Difference]: Finished difference. Result has 101 places, 97 transitions, 210 flow [2023-11-06 22:10:51,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=456, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=210, PETRI_PLACES=101, PETRI_TRANSITIONS=97} [2023-11-06 22:10:51,685 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, -15 predicate places. [2023-11-06 22:10:51,685 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 97 transitions, 210 flow [2023-11-06 22:10:51,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 249.5) internal successors, (499), 2 states have internal predecessors, (499), 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) [2023-11-06 22:10:51,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:10:51,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 22:10:51,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:10:51,688 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-06 22:10:51,699 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:10:51,700 INFO L85 PathProgramCache]: Analyzing trace with hash 882399927, now seen corresponding path program 1 times [2023-11-06 22:10:51,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:10:51,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820551767] [2023-11-06 22:10:51,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:10:51,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:10:51,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:10:51,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:10:51,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:10:51,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820551767] [2023-11-06 22:10:51,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820551767] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:10:51,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:10:51,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:10:51,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118096006] [2023-11-06 22:10:51,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:10:51,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:10:51,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:10:51,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:10:51,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:10:52,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 456 [2023-11-06 22:10:52,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 97 transitions, 210 flow. Second operand has 3 states, 3 states have (on average 232.33333333333334) internal successors, (697), 3 states have internal predecessors, (697), 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) [2023-11-06 22:10:52,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:10:52,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 456 [2023-11-06 22:10:52,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:10:57,893 INFO L124 PetriNetUnfolderBase]: 40038/59205 cut-off events. [2023-11-06 22:10:57,893 INFO L125 PetriNetUnfolderBase]: For 960/960 co-relation queries the response was YES. [2023-11-06 22:10:58,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112262 conditions, 59205 events. 40038/59205 cut-off events. For 960/960 co-relation queries the response was YES. Maximal size of possible extension queue 2124. Compared 456341 event pairs, 35683 based on Foata normal form. 0/36590 useless extension candidates. Maximal degree in co-relation 112259. Up to 47638 conditions per place. [2023-11-06 22:10:58,317 INFO L140 encePairwiseOnDemand]: 447/456 looper letters, 91 selfloop transitions, 7 changer transitions 0/144 dead transitions. [2023-11-06 22:10:58,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 144 transitions, 515 flow [2023-11-06 22:10:58,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:10:58,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:10:58,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 793 transitions. [2023-11-06 22:10:58,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5796783625730995 [2023-11-06 22:10:58,321 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 793 transitions. [2023-11-06 22:10:58,321 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 793 transitions. [2023-11-06 22:10:58,322 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:10:58,322 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 793 transitions. [2023-11-06 22:10:58,325 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 264.3333333333333) internal successors, (793), 3 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:10:58,330 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 456.0) internal successors, (1824), 4 states have internal predecessors, (1824), 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) [2023-11-06 22:10:58,331 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 456.0) internal successors, (1824), 4 states have internal predecessors, (1824), 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) [2023-11-06 22:10:58,331 INFO L175 Difference]: Start difference. First operand has 101 places, 97 transitions, 210 flow. Second operand 3 states and 793 transitions. [2023-11-06 22:10:58,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 144 transitions, 515 flow [2023-11-06 22:10:58,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 144 transitions, 515 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 22:10:58,338 INFO L231 Difference]: Finished difference. Result has 105 places, 103 transitions, 266 flow [2023-11-06 22:10:58,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=456, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=266, PETRI_PLACES=105, PETRI_TRANSITIONS=103} [2023-11-06 22:10:58,339 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, -11 predicate places. [2023-11-06 22:10:58,339 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 103 transitions, 266 flow [2023-11-06 22:10:58,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 232.33333333333334) internal successors, (697), 3 states have internal predecessors, (697), 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) [2023-11-06 22:10:58,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:10:58,340 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 22:10:58,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 22:10:58,341 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-06 22:10:58,341 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:10:58,341 INFO L85 PathProgramCache]: Analyzing trace with hash 882399928, now seen corresponding path program 1 times [2023-11-06 22:10:58,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:10:58,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319963471] [2023-11-06 22:10:58,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:10:58,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:10:58,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:10:58,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:10:58,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:10:58,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319963471] [2023-11-06 22:10:58,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319963471] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:10:58,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:10:58,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:10:58,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25490414] [2023-11-06 22:10:58,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:10:58,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:10:58,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:10:58,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:10:58,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:10:58,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 243 out of 456 [2023-11-06 22:10:58,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 103 transitions, 266 flow. Second operand has 3 states, 3 states have (on average 244.33333333333334) internal successors, (733), 3 states have internal predecessors, (733), 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) [2023-11-06 22:10:58,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:10:58,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 243 of 456 [2023-11-06 22:10:58,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:11:04,410 INFO L124 PetriNetUnfolderBase]: 39741/58765 cut-off events. [2023-11-06 22:11:04,410 INFO L125 PetriNetUnfolderBase]: For 2830/2838 co-relation queries the response was YES. [2023-11-06 22:11:04,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113213 conditions, 58765 events. 39741/58765 cut-off events. For 2830/2838 co-relation queries the response was YES. Maximal size of possible extension queue 2122. Compared 452896 event pairs, 37789 based on Foata normal form. 151/36503 useless extension candidates. Maximal degree in co-relation 113208. Up to 50850 conditions per place. [2023-11-06 22:11:04,926 INFO L140 encePairwiseOnDemand]: 453/456 looper letters, 52 selfloop transitions, 1 changer transitions 0/101 dead transitions. [2023-11-06 22:11:04,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 101 transitions, 368 flow [2023-11-06 22:11:04,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:11:04,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:11:04,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 779 transitions. [2023-11-06 22:11:04,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5694444444444444 [2023-11-06 22:11:04,931 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 779 transitions. [2023-11-06 22:11:04,931 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 779 transitions. [2023-11-06 22:11:04,932 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:11:04,932 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 779 transitions. [2023-11-06 22:11:04,937 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 259.6666666666667) internal successors, (779), 3 states have internal predecessors, (779), 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) [2023-11-06 22:11:04,941 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 456.0) internal successors, (1824), 4 states have internal predecessors, (1824), 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) [2023-11-06 22:11:04,942 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 456.0) internal successors, (1824), 4 states have internal predecessors, (1824), 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) [2023-11-06 22:11:04,943 INFO L175 Difference]: Start difference. First operand has 105 places, 103 transitions, 266 flow. Second operand 3 states and 779 transitions. [2023-11-06 22:11:04,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 101 transitions, 368 flow [2023-11-06 22:11:04,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 101 transitions, 354 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:11:04,960 INFO L231 Difference]: Finished difference. Result has 103 places, 101 transitions, 250 flow [2023-11-06 22:11:04,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=456, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=250, PETRI_PLACES=103, PETRI_TRANSITIONS=101} [2023-11-06 22:11:04,962 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, -13 predicate places. [2023-11-06 22:11:04,963 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 101 transitions, 250 flow [2023-11-06 22:11:04,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 244.33333333333334) internal successors, (733), 3 states have internal predecessors, (733), 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) [2023-11-06 22:11:04,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:11:04,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:11:04,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 22:11:04,970 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-06 22:11:04,970 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:11:04,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1877793919, now seen corresponding path program 1 times [2023-11-06 22:11:04,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:11:04,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544047422] [2023-11-06 22:11:04,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:11:04,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:11:05,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:11:05,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:11:05,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:11:05,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544047422] [2023-11-06 22:11:05,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544047422] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:11:05,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:11:05,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:11:05,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247250311] [2023-11-06 22:11:05,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:11:05,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:11:05,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:11:05,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:11:05,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:11:05,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 456 [2023-11-06 22:11:05,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 101 transitions, 250 flow. Second operand has 4 states, 4 states have (on average 228.5) internal successors, (914), 4 states have internal predecessors, (914), 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) [2023-11-06 22:11:05,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:11:05,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 456 [2023-11-06 22:11:05,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:11:09,983 INFO L124 PetriNetUnfolderBase]: 30735/45921 cut-off events. [2023-11-06 22:11:09,983 INFO L125 PetriNetUnfolderBase]: For 1544/1544 co-relation queries the response was YES. [2023-11-06 22:11:10,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88515 conditions, 45921 events. 30735/45921 cut-off events. For 1544/1544 co-relation queries the response was YES. Maximal size of possible extension queue 1609. Compared 349294 event pairs, 26945 based on Foata normal form. 0/29686 useless extension candidates. Maximal degree in co-relation 88510. Up to 35588 conditions per place. [2023-11-06 22:11:10,332 INFO L140 encePairwiseOnDemand]: 449/456 looper letters, 93 selfloop transitions, 10 changer transitions 0/149 dead transitions. [2023-11-06 22:11:10,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 149 transitions, 585 flow [2023-11-06 22:11:10,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:11:10,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:11:10,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 777 transitions. [2023-11-06 22:11:10,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5679824561403509 [2023-11-06 22:11:10,336 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 777 transitions. [2023-11-06 22:11:10,336 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 777 transitions. [2023-11-06 22:11:10,337 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:11:10,337 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 777 transitions. [2023-11-06 22:11:10,340 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 259.0) internal successors, (777), 3 states have internal predecessors, (777), 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) [2023-11-06 22:11:10,344 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 456.0) internal successors, (1824), 4 states have internal predecessors, (1824), 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) [2023-11-06 22:11:10,346 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 456.0) internal successors, (1824), 4 states have internal predecessors, (1824), 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) [2023-11-06 22:11:10,346 INFO L175 Difference]: Start difference. First operand has 103 places, 101 transitions, 250 flow. Second operand 3 states and 777 transitions. [2023-11-06 22:11:10,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 149 transitions, 585 flow [2023-11-06 22:11:10,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 149 transitions, 584 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:11:10,357 INFO L231 Difference]: Finished difference. Result has 106 places, 109 transitions, 337 flow [2023-11-06 22:11:10,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=456, PETRI_DIFFERENCE_MINUEND_FLOW=249, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=337, PETRI_PLACES=106, PETRI_TRANSITIONS=109} [2023-11-06 22:11:10,359 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, -10 predicate places. [2023-11-06 22:11:10,359 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 109 transitions, 337 flow [2023-11-06 22:11:10,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 228.5) internal successors, (914), 4 states have internal predecessors, (914), 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) [2023-11-06 22:11:10,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:11:10,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:11:10,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 22:11:10,361 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-06 22:11:10,361 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:11:10,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1877793920, now seen corresponding path program 1 times [2023-11-06 22:11:10,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:11:10,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833436408] [2023-11-06 22:11:10,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:11:10,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:11:10,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:11:10,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:11:10,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:11:10,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833436408] [2023-11-06 22:11:10,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833436408] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:11:10,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:11:10,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:11:10,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71229762] [2023-11-06 22:11:10,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:11:10,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:11:10,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:11:10,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:11:10,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:11:10,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 456 [2023-11-06 22:11:10,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 109 transitions, 337 flow. Second operand has 4 states, 4 states have (on average 236.5) internal successors, (946), 4 states have internal predecessors, (946), 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) [2023-11-06 22:11:10,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:11:10,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 456 [2023-11-06 22:11:10,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:11:16,807 INFO L124 PetriNetUnfolderBase]: 40465/61815 cut-off events. [2023-11-06 22:11:16,807 INFO L125 PetriNetUnfolderBase]: For 8809/8829 co-relation queries the response was YES. [2023-11-06 22:11:16,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124449 conditions, 61815 events. 40465/61815 cut-off events. For 8809/8829 co-relation queries the response was YES. Maximal size of possible extension queue 2142. Compared 504728 event pairs, 30001 based on Foata normal form. 1/43521 useless extension candidates. Maximal degree in co-relation 124443. Up to 38260 conditions per place. [2023-11-06 22:11:17,303 INFO L140 encePairwiseOnDemand]: 449/456 looper letters, 112 selfloop transitions, 9 changer transitions 0/167 dead transitions. [2023-11-06 22:11:17,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 167 transitions, 784 flow [2023-11-06 22:11:17,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:11:17,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:11:17,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1039 transitions. [2023-11-06 22:11:17,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5696271929824561 [2023-11-06 22:11:17,310 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1039 transitions. [2023-11-06 22:11:17,311 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1039 transitions. [2023-11-06 22:11:17,312 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:11:17,313 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1039 transitions. [2023-11-06 22:11:17,318 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 259.75) internal successors, (1039), 4 states have internal predecessors, (1039), 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) [2023-11-06 22:11:17,325 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 456.0) internal successors, (2280), 5 states have internal predecessors, (2280), 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) [2023-11-06 22:11:17,328 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 456.0) internal successors, (2280), 5 states have internal predecessors, (2280), 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) [2023-11-06 22:11:17,328 INFO L175 Difference]: Start difference. First operand has 106 places, 109 transitions, 337 flow. Second operand 4 states and 1039 transitions. [2023-11-06 22:11:17,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 167 transitions, 784 flow [2023-11-06 22:11:17,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 167 transitions, 750 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:11:17,387 INFO L231 Difference]: Finished difference. Result has 110 places, 116 transitions, 381 flow [2023-11-06 22:11:17,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=456, PETRI_DIFFERENCE_MINUEND_FLOW=317, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=381, PETRI_PLACES=110, PETRI_TRANSITIONS=116} [2023-11-06 22:11:17,389 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, -6 predicate places. [2023-11-06 22:11:17,389 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 116 transitions, 381 flow [2023-11-06 22:11:17,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 236.5) internal successors, (946), 4 states have internal predecessors, (946), 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) [2023-11-06 22:11:17,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:11:17,390 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:11:17,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 22:11:17,391 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-06 22:11:17,391 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:11:17,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1642979589, now seen corresponding path program 1 times [2023-11-06 22:11:17,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:11:17,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565483217] [2023-11-06 22:11:17,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:11:17,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:11:17,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:11:17,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:11:17,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:11:17,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565483217] [2023-11-06 22:11:17,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565483217] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:11:17,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:11:17,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:11:17,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232758280] [2023-11-06 22:11:17,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:11:17,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:11:17,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:11:17,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:11:17,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:11:17,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 456 [2023-11-06 22:11:17,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 116 transitions, 381 flow. Second operand has 4 states, 4 states have (on average 232.5) internal successors, (930), 4 states have internal predecessors, (930), 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) [2023-11-06 22:11:17,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:11:17,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 456 [2023-11-06 22:11:17,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:11:22,303 INFO L124 PetriNetUnfolderBase]: 27279/45927 cut-off events. [2023-11-06 22:11:22,303 INFO L125 PetriNetUnfolderBase]: For 18966/19009 co-relation queries the response was YES. [2023-11-06 22:11:22,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97013 conditions, 45927 events. 27279/45927 cut-off events. For 18966/19009 co-relation queries the response was YES. Maximal size of possible extension queue 1376. Compared 401580 event pairs, 22613 based on Foata normal form. 36/34338 useless extension candidates. Maximal degree in co-relation 97005. Up to 28527 conditions per place. [2023-11-06 22:11:22,986 INFO L140 encePairwiseOnDemand]: 445/456 looper letters, 125 selfloop transitions, 15 changer transitions 0/186 dead transitions. [2023-11-06 22:11:22,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 186 transitions, 909 flow [2023-11-06 22:11:22,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:11:22,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:11:22,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1042 transitions. [2023-11-06 22:11:22,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5712719298245614 [2023-11-06 22:11:22,992 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1042 transitions. [2023-11-06 22:11:22,993 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1042 transitions. [2023-11-06 22:11:22,994 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:11:22,994 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1042 transitions. [2023-11-06 22:11:22,998 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 260.5) internal successors, (1042), 4 states have internal predecessors, (1042), 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) [2023-11-06 22:11:23,004 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 456.0) internal successors, (2280), 5 states have internal predecessors, (2280), 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) [2023-11-06 22:11:23,006 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 456.0) internal successors, (2280), 5 states have internal predecessors, (2280), 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) [2023-11-06 22:11:23,006 INFO L175 Difference]: Start difference. First operand has 110 places, 116 transitions, 381 flow. Second operand 4 states and 1042 transitions. [2023-11-06 22:11:23,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 186 transitions, 909 flow [2023-11-06 22:11:23,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 186 transitions, 909 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 22:11:23,025 INFO L231 Difference]: Finished difference. Result has 113 places, 121 transitions, 482 flow [2023-11-06 22:11:23,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=456, PETRI_DIFFERENCE_MINUEND_FLOW=377, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=482, PETRI_PLACES=113, PETRI_TRANSITIONS=121} [2023-11-06 22:11:23,026 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, -3 predicate places. [2023-11-06 22:11:23,027 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 121 transitions, 482 flow [2023-11-06 22:11:23,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 232.5) internal successors, (930), 4 states have internal predecessors, (930), 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) [2023-11-06 22:11:23,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:11:23,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:11:23,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 22:11:23,029 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-06 22:11:23,029 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:11:23,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1778799529, now seen corresponding path program 1 times [2023-11-06 22:11:23,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:11:23,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205895706] [2023-11-06 22:11:23,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:11:23,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:11:23,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:11:23,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:11:23,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:11:23,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205895706] [2023-11-06 22:11:23,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205895706] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:11:23,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:11:23,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:11:23,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436538917] [2023-11-06 22:11:23,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:11:23,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:11:23,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:11:23,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:11:23,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:11:23,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 241 out of 456 [2023-11-06 22:11:23,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 121 transitions, 482 flow. Second operand has 4 states, 4 states have (on average 242.5) internal successors, (970), 4 states have internal predecessors, (970), 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) [2023-11-06 22:11:23,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:11:23,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 241 of 456 [2023-11-06 22:11:23,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand