./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/parallel-barrier-loop.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_e8e4870d-9a11-4c27-bfd2-d5c4e24d4a4d/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8e4870d-9a11-4c27-bfd2-d5c4e24d4a4d/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_e8e4870d-9a11-4c27-bfd2-d5c4e24d4a4d/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8e4870d-9a11-4c27-bfd2-d5c4e24d4a4d/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/parallel-barrier-loop.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8e4870d-9a11-4c27-bfd2-d5c4e24d4a4d/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_e8e4870d-9a11-4c27-bfd2-d5c4e24d4a4d/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 6cbe8dd40fecf4391efe5e4ba3939c64a9fdbbfb53083def47a68bbefda43a3c --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:29:54,444 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:29:54,562 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8e4870d-9a11-4c27-bfd2-d5c4e24d4a4d/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-06 22:29:54,576 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:29:54,577 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:29:54,615 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:29:54,617 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:29:54,618 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:29:54,619 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:29:54,624 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:29:54,626 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:29:54,627 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:29:54,627 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:29:54,629 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:29:54,630 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:29:54,630 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:29:54,631 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:29:54,631 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:29:54,632 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 22:29:54,632 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 22:29:54,633 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 22:29:54,633 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:29:54,634 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 22:29:54,634 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 22:29:54,635 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:29:54,635 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:29:54,636 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:29:54,637 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:29:54,637 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:29:54,638 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:29:54,640 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:29:54,640 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:29:54,654 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:29:54,654 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:29:54,655 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:29:54,655 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:29:54,656 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:29:54,656 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:29:54,656 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_e8e4870d-9a11-4c27-bfd2-d5c4e24d4a4d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8e4870d-9a11-4c27-bfd2-d5c4e24d4a4d/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6cbe8dd40fecf4391efe5e4ba3939c64a9fdbbfb53083def47a68bbefda43a3c [2023-11-06 22:29:54,966 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:29:55,001 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:29:55,005 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:29:55,006 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:29:55,007 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:29:55,008 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8e4870d-9a11-4c27-bfd2-d5c4e24d4a4d/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/parallel-barrier-loop.wvr.c [2023-11-06 22:29:58,166 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:29:58,384 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:29:58,385 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8e4870d-9a11-4c27-bfd2-d5c4e24d4a4d/sv-benchmarks/c/weaver/parallel-barrier-loop.wvr.c [2023-11-06 22:29:58,395 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8e4870d-9a11-4c27-bfd2-d5c4e24d4a4d/bin/uautomizer-verify-WvqO1wxjHP/data/3a7a330ff/4ba8fa8d64ca43289e93d95a842ab4e7/FLAG6f16b9e1d [2023-11-06 22:29:58,411 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8e4870d-9a11-4c27-bfd2-d5c4e24d4a4d/bin/uautomizer-verify-WvqO1wxjHP/data/3a7a330ff/4ba8fa8d64ca43289e93d95a842ab4e7 [2023-11-06 22:29:58,413 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:29:58,415 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:29:58,417 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:29:58,417 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:29:58,422 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:29:58,423 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:29:58" (1/1) ... [2023-11-06 22:29:58,424 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72a8d55f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:58, skipping insertion in model container [2023-11-06 22:29:58,424 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:29:58" (1/1) ... [2023-11-06 22:29:58,456 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:29:58,690 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:29:58,702 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:29:58,740 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:29:58,749 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:29:58,750 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:29:58,758 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:29:58,758 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:58 WrapperNode [2023-11-06 22:29:58,759 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:29:58,760 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:29:58,760 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:29:58,760 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:29:58,768 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:58" (1/1) ... [2023-11-06 22:29:58,779 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:58" (1/1) ... [2023-11-06 22:29:58,813 INFO L138 Inliner]: procedures = 25, calls = 121, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 269 [2023-11-06 22:29:58,813 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:29:58,814 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:29:58,814 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:29:58,814 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:29:58,824 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:58" (1/1) ... [2023-11-06 22:29:58,825 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:58" (1/1) ... [2023-11-06 22:29:58,829 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:58" (1/1) ... [2023-11-06 22:29:58,830 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:58" (1/1) ... [2023-11-06 22:29:58,847 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:58" (1/1) ... [2023-11-06 22:29:58,851 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:58" (1/1) ... [2023-11-06 22:29:58,854 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:58" (1/1) ... [2023-11-06 22:29:58,858 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:58" (1/1) ... [2023-11-06 22:29:58,862 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:29:58,872 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:29:58,874 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:29:58,874 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:29:58,875 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:58" (1/1) ... [2023-11-06 22:29:58,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:29:58,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8e4870d-9a11-4c27-bfd2-d5c4e24d4a4d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:29:58,922 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8e4870d-9a11-4c27-bfd2-d5c4e24d4a4d/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:29:58,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8e4870d-9a11-4c27-bfd2-d5c4e24d4a4d/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:29:58,975 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:29:58,976 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:29:58,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:29:58,977 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:29:58,977 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 22:29:58,977 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 22:29:58,978 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 22:29:58,978 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 22:29:58,979 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-06 22:29:58,980 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-06 22:29:58,980 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-11-06 22:29:58,980 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-11-06 22:29:58,980 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:29:58,980 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2023-11-06 22:29:58,981 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2023-11-06 22:29:58,983 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2023-11-06 22:29:58,983 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2023-11-06 22:29:58,983 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-06 22:29:58,983 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-06 22:29:58,984 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:29:58,984 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:29:58,984 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:29:58,986 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 22:29:59,172 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:29:59,175 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:29:59,772 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:29:59,883 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:29:59,887 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-06 22:29:59,892 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:29:59 BoogieIcfgContainer [2023-11-06 22:29:59,892 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:29:59,894 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:29:59,894 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:29:59,898 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:29:59,899 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:29:58" (1/3) ... [2023-11-06 22:29:59,899 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14c49ba4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:29:59, skipping insertion in model container [2023-11-06 22:29:59,900 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:58" (2/3) ... [2023-11-06 22:29:59,900 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14c49ba4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:29:59, skipping insertion in model container [2023-11-06 22:29:59,900 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:29:59" (3/3) ... [2023-11-06 22:29:59,902 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-barrier-loop.wvr.c [2023-11-06 22:29:59,923 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:29:59,923 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2023-11-06 22:29:59,923 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:30:00,151 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-11-06 22:30:00,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 308 places, 303 transitions, 672 flow [2023-11-06 22:30:00,400 INFO L124 PetriNetUnfolderBase]: 14/271 cut-off events. [2023-11-06 22:30:00,400 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-06 22:30:00,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 300 conditions, 271 events. 14/271 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 527 event pairs, 0 based on Foata normal form. 0/231 useless extension candidates. Maximal degree in co-relation 223. Up to 3 conditions per place. [2023-11-06 22:30:00,412 INFO L82 GeneralOperation]: Start removeDead. Operand has 308 places, 303 transitions, 672 flow [2023-11-06 22:30:00,428 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 271 places, 266 transitions, 580 flow [2023-11-06 22:30:00,432 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:30:00,442 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 271 places, 266 transitions, 580 flow [2023-11-06 22:30:00,445 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 271 places, 266 transitions, 580 flow [2023-11-06 22:30:00,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 271 places, 266 transitions, 580 flow [2023-11-06 22:30:00,520 INFO L124 PetriNetUnfolderBase]: 14/266 cut-off events. [2023-11-06 22:30:00,520 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-06 22:30:00,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 295 conditions, 266 events. 14/266 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 528 event pairs, 0 based on Foata normal form. 0/227 useless extension candidates. Maximal degree in co-relation 223. Up to 3 conditions per place. [2023-11-06 22:30:00,535 INFO L119 LiptonReduction]: Number of co-enabled transitions 15256 [2023-11-06 22:30:05,979 INFO L134 LiptonReduction]: Checked pairs total: 119444 [2023-11-06 22:30:05,979 INFO L136 LiptonReduction]: Total number of compositions: 197 [2023-11-06 22:30:05,995 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:30:06,002 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;@69c83a77, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:30:06,002 INFO L358 AbstractCegarLoop]: Starting to check reachability of 52 error locations. [2023-11-06 22:30:06,015 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:30:06,015 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-11-06 22:30:06,015 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:30:06,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:30:06,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-11-06 22:30:06,017 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-06 22:30:06,022 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:30:06,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1123, now seen corresponding path program 1 times [2023-11-06 22:30:06,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:30:06,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243695969] [2023-11-06 22:30:06,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:30:06,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:30:06,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:30:06,143 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 22:30:06,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:30:06,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243695969] [2023-11-06 22:30:06,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243695969] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:30:06,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:30:06,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-11-06 22:30:06,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717066794] [2023-11-06 22:30:06,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:30:06,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 22:30:06,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:30:06,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 22:30:06,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:30:06,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 504 [2023-11-06 22:30:06,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 112 transitions, 272 flow. Second operand has 2 states, 2 states have (on average 266.5) internal successors, (533), 2 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) [2023-11-06 22:30:06,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:30:06,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 504 [2023-11-06 22:30:06,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:30:24,361 INFO L124 PetriNetUnfolderBase]: 130780/172865 cut-off events. [2023-11-06 22:30:24,361 INFO L125 PetriNetUnfolderBase]: For 10221/10221 co-relation queries the response was YES. [2023-11-06 22:30:24,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 343712 conditions, 172865 events. 130780/172865 cut-off events. For 10221/10221 co-relation queries the response was YES. Maximal size of possible extension queue 8063. Compared 1148752 event pairs, 104620 based on Foata normal form. 0/90071 useless extension candidates. Maximal degree in co-relation 341204. Up to 157514 conditions per place. [2023-11-06 22:30:26,386 INFO L140 encePairwiseOnDemand]: 501/504 looper letters, 55 selfloop transitions, 0 changer transitions 0/109 dead transitions. [2023-11-06 22:30:26,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 109 transitions, 376 flow [2023-11-06 22:30:26,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 22:30:26,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-06 22:30:26,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 590 transitions. [2023-11-06 22:30:26,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853174603174603 [2023-11-06 22:30:26,406 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 590 transitions. [2023-11-06 22:30:26,407 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 590 transitions. [2023-11-06 22:30:26,410 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:30:26,413 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 590 transitions. [2023-11-06 22:30:26,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 295.0) internal successors, (590), 2 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) [2023-11-06 22:30:26,427 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 504.0) internal successors, (1512), 3 states have internal predecessors, (1512), 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 22:30:26,429 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 504.0) internal successors, (1512), 3 states have internal predecessors, (1512), 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 22:30:26,431 INFO L175 Difference]: Start difference. First operand has 123 places, 112 transitions, 272 flow. Second operand 2 states and 590 transitions. [2023-11-06 22:30:26,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 109 transitions, 376 flow [2023-11-06 22:30:29,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 109 transitions, 344 flow, removed 0 selfloop flow, removed 12 redundant places. [2023-11-06 22:30:29,754 INFO L231 Difference]: Finished difference. Result has 109 places, 109 transitions, 234 flow [2023-11-06 22:30:29,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=504, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=234, PETRI_PLACES=109, PETRI_TRANSITIONS=109} [2023-11-06 22:30:29,761 INFO L281 CegarLoopForPetriNet]: 123 programPoint places, -14 predicate places. [2023-11-06 22:30:29,762 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 109 transitions, 234 flow [2023-11-06 22:30:29,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 266.5) internal successors, (533), 2 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) [2023-11-06 22:30:29,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:30:29,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 22:30:29,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:30:29,764 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 22:30:29,765 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:30:29,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1063083232, now seen corresponding path program 1 times [2023-11-06 22:30:29,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:30:29,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153823974] [2023-11-06 22:30:29,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:30:29,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:30:29,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:30:29,989 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 22:30:29,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:30:29,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153823974] [2023-11-06 22:30:29,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153823974] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:30:29,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:30:29,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:30:29,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226779290] [2023-11-06 22:30:29,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:30:29,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:30:29,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:30:29,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:30:29,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:30:30,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 504 [2023-11-06 22:30:30,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 109 transitions, 234 flow. Second operand has 3 states, 3 states have (on average 249.33333333333334) internal successors, (748), 3 states have internal predecessors, (748), 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 22:30:30,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:30:30,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 504 [2023-11-06 22:30:30,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:30:45,325 INFO L124 PetriNetUnfolderBase]: 133318/176681 cut-off events. [2023-11-06 22:30:45,326 INFO L125 PetriNetUnfolderBase]: For 1867/1867 co-relation queries the response was YES. [2023-11-06 22:30:45,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 341023 conditions, 176681 events. 133318/176681 cut-off events. For 1867/1867 co-relation queries the response was YES. Maximal size of possible extension queue 8084. Compared 1179798 event pairs, 102147 based on Foata normal form. 0/92320 useless extension candidates. Maximal degree in co-relation 341020. Up to 154128 conditions per place. [2023-11-06 22:30:46,850 INFO L140 encePairwiseOnDemand]: 495/504 looper letters, 103 selfloop transitions, 7 changer transitions 0/162 dead transitions. [2023-11-06 22:30:46,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 162 transitions, 575 flow [2023-11-06 22:30:46,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:30:46,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:30:46,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 856 transitions. [2023-11-06 22:30:46,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5661375661375662 [2023-11-06 22:30:46,859 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 856 transitions. [2023-11-06 22:30:46,863 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 856 transitions. [2023-11-06 22:30:46,865 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:30:46,865 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 856 transitions. [2023-11-06 22:30:46,870 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 285.3333333333333) internal successors, (856), 3 states have internal predecessors, (856), 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 22:30:46,878 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 504.0) internal successors, (2016), 4 states have internal predecessors, (2016), 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 22:30:46,880 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 504.0) internal successors, (2016), 4 states have internal predecessors, (2016), 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 22:30:46,882 INFO L175 Difference]: Start difference. First operand has 109 places, 109 transitions, 234 flow. Second operand 3 states and 856 transitions. [2023-11-06 22:30:46,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 162 transitions, 575 flow [2023-11-06 22:30:46,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 162 transitions, 575 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 22:30:46,898 INFO L231 Difference]: Finished difference. Result has 113 places, 115 transitions, 290 flow [2023-11-06 22:30:46,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=504, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=290, PETRI_PLACES=113, PETRI_TRANSITIONS=115} [2023-11-06 22:30:46,902 INFO L281 CegarLoopForPetriNet]: 123 programPoint places, -10 predicate places. [2023-11-06 22:30:46,902 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 115 transitions, 290 flow [2023-11-06 22:30:46,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 249.33333333333334) internal successors, (748), 3 states have internal predecessors, (748), 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 22:30:46,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:30:46,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 22:30:46,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 22:30:46,904 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 22:30:46,906 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:30:46,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1063083233, now seen corresponding path program 1 times [2023-11-06 22:30:46,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:30:46,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025564182] [2023-11-06 22:30:46,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:30:46,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:30:46,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:30:47,164 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 22:30:47,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:30:47,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025564182] [2023-11-06 22:30:47,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025564182] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:30:47,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:30:47,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:30:47,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037730460] [2023-11-06 22:30:47,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:30:47,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:30:47,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:30:47,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:30:47,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:30:47,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 260 out of 504 [2023-11-06 22:30:47,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 115 transitions, 290 flow. Second operand has 3 states, 3 states have (on average 261.3333333333333) internal successors, (784), 3 states have internal predecessors, (784), 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 22:30:47,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:30:47,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 260 of 504 [2023-11-06 22:30:47,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand