./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13cddac2-9167-4641-bda5-a3d35b5bb8ff/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13cddac2-9167-4641-bda5-a3d35b5bb8ff/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13cddac2-9167-4641-bda5-a3d35b5bb8ff/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13cddac2-9167-4641-bda5-a3d35b5bb8ff/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13cddac2-9167-4641-bda5-a3d35b5bb8ff/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13cddac2-9167-4641-bda5-a3d35b5bb8ff/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6b30bad195dde021066febd52c7985271e0448c265b66e6efcbd9c3306420e73 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 08:03:37,694 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 08:03:37,811 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13cddac2-9167-4641-bda5-a3d35b5bb8ff/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-19 08:03:37,822 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 08:03:37,823 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 08:03:37,865 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 08:03:37,866 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 08:03:37,867 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 08:03:37,868 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 08:03:37,873 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 08:03:37,875 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 08:03:37,875 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 08:03:37,876 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 08:03:37,878 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 08:03:37,878 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 08:03:37,879 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 08:03:37,879 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 08:03:37,880 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 08:03:37,880 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-19 08:03:37,880 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-19 08:03:37,881 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-19 08:03:37,882 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 08:03:37,882 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-19 08:03:37,883 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 08:03:37,883 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 08:03:37,884 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 08:03:37,885 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 08:03:37,885 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 08:03:37,886 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 08:03:37,886 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:03:37,887 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 08:03:37,888 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 08:03:37,888 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 08:03:37,888 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 08:03:37,889 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 08:03:37,889 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 08:03:37,889 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 08:03:37,889 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 08:03:37,890 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_13cddac2-9167-4641-bda5-a3d35b5bb8ff/bin/uautomizer-verify-uCwYo4JHxu/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13cddac2-9167-4641-bda5-a3d35b5bb8ff/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6b30bad195dde021066febd52c7985271e0448c265b66e6efcbd9c3306420e73 [2023-11-19 08:03:38,192 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 08:03:38,223 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 08:03:38,227 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 08:03:38,228 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 08:03:38,229 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 08:03:38,231 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13cddac2-9167-4641-bda5-a3d35b5bb8ff/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c [2023-11-19 08:03:41,403 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 08:03:41,628 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 08:03:41,629 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13cddac2-9167-4641-bda5-a3d35b5bb8ff/sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c [2023-11-19 08:03:41,636 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13cddac2-9167-4641-bda5-a3d35b5bb8ff/bin/uautomizer-verify-uCwYo4JHxu/data/bc1b8bfe8/df676ef5e6d9463aaa1b61276d4831d2/FLAG6aa84d987 [2023-11-19 08:03:41,653 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13cddac2-9167-4641-bda5-a3d35b5bb8ff/bin/uautomizer-verify-uCwYo4JHxu/data/bc1b8bfe8/df676ef5e6d9463aaa1b61276d4831d2 [2023-11-19 08:03:41,656 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 08:03:41,658 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 08:03:41,659 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 08:03:41,660 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 08:03:41,669 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 08:03:41,670 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:03:41" (1/1) ... [2023-11-19 08:03:41,671 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a123e58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:41, skipping insertion in model container [2023-11-19 08:03:41,671 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:03:41" (1/1) ... [2023-11-19 08:03:41,703 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 08:03:41,863 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:03:41,874 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 08:03:41,898 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:03:41,908 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 08:03:41,908 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 08:03:41,916 INFO L206 MainTranslator]: Completed translation [2023-11-19 08:03:41,917 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:41 WrapperNode [2023-11-19 08:03:41,917 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 08:03:41,918 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 08:03:41,919 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 08:03:41,919 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 08:03:41,927 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:41" (1/1) ... [2023-11-19 08:03:41,936 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:41" (1/1) ... [2023-11-19 08:03:41,958 INFO L138 Inliner]: procedures = 21, calls = 35, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 62 [2023-11-19 08:03:41,959 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 08:03:41,960 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 08:03:41,960 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 08:03:41,960 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 08:03:41,970 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:41" (1/1) ... [2023-11-19 08:03:41,971 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:41" (1/1) ... [2023-11-19 08:03:41,974 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:41" (1/1) ... [2023-11-19 08:03:41,974 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:41" (1/1) ... [2023-11-19 08:03:41,981 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:41" (1/1) ... [2023-11-19 08:03:41,984 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:41" (1/1) ... [2023-11-19 08:03:41,991 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:41" (1/1) ... [2023-11-19 08:03:41,998 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:41" (1/1) ... [2023-11-19 08:03:42,001 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 08:03:42,002 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 08:03:42,003 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 08:03:42,003 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 08:03:42,011 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:41" (1/1) ... [2023-11-19 08:03:42,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:03:42,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13cddac2-9167-4641-bda5-a3d35b5bb8ff/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:03:42,045 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13cddac2-9167-4641-bda5-a3d35b5bb8ff/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 08:03:42,100 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 08:03:42,101 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-19 08:03:42,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13cddac2-9167-4641-bda5-a3d35b5bb8ff/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 08:03:42,102 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-19 08:03:42,102 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-19 08:03:42,103 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-19 08:03:42,103 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 08:03:42,103 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 08:03:42,103 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 08:03:42,104 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-19 08:03:42,104 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-19 08:03:42,104 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 08:03:42,104 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 08:03:42,104 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 08:03:42,105 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 08:03:42,106 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 08:03:42,263 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 08:03:42,266 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 08:03:42,626 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 08:03:42,723 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 08:03:42,723 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-19 08:03:42,727 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:03:42 BoogieIcfgContainer [2023-11-19 08:03:42,727 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 08:03:42,737 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 08:03:42,737 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 08:03:42,741 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 08:03:42,741 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:03:41" (1/3) ... [2023-11-19 08:03:42,742 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2493e886 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:03:42, skipping insertion in model container [2023-11-19 08:03:42,742 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:41" (2/3) ... [2023-11-19 08:03:42,743 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2493e886 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:03:42, skipping insertion in model container [2023-11-19 08:03:42,743 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:03:42" (3/3) ... [2023-11-19 08:03:42,744 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-threaded-sum-2.wvr.c [2023-11-19 08:03:42,767 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 08:03:42,768 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-11-19 08:03:42,768 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 08:03:42,860 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-19 08:03:42,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 104 places, 103 transitions, 220 flow [2023-11-19 08:03:42,976 INFO L124 PetriNetUnfolderBase]: 6/101 cut-off events. [2023-11-19 08:03:42,977 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 08:03:42,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110 conditions, 101 events. 6/101 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 71 event pairs, 0 based on Foata normal form. 0/85 useless extension candidates. Maximal degree in co-relation 56. Up to 2 conditions per place. [2023-11-19 08:03:42,982 INFO L82 GeneralOperation]: Start removeDead. Operand has 104 places, 103 transitions, 220 flow [2023-11-19 08:03:42,988 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 97 places, 96 transitions, 204 flow [2023-11-19 08:03:42,991 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 08:03:43,002 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 97 places, 96 transitions, 204 flow [2023-11-19 08:03:43,006 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 97 places, 96 transitions, 204 flow [2023-11-19 08:03:43,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 97 places, 96 transitions, 204 flow [2023-11-19 08:03:43,035 INFO L124 PetriNetUnfolderBase]: 6/96 cut-off events. [2023-11-19 08:03:43,035 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 08:03:43,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105 conditions, 96 events. 6/96 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 72 event pairs, 0 based on Foata normal form. 0/81 useless extension candidates. Maximal degree in co-relation 56. Up to 2 conditions per place. [2023-11-19 08:03:43,038 INFO L119 LiptonReduction]: Number of co-enabled transitions 614 [2023-11-19 08:03:47,081 INFO L134 LiptonReduction]: Checked pairs total: 1019 [2023-11-19 08:03:47,082 INFO L136 LiptonReduction]: Total number of compositions: 101 [2023-11-19 08:03:47,099 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 08:03:47,106 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;@3b819291, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 08:03:47,106 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2023-11-19 08:03:47,108 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 08:03:47,108 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-11-19 08:03:47,109 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 08:03:47,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:03:47,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-11-19 08:03:47,110 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-19 08:03:47,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:03:47,115 INFO L85 PathProgramCache]: Analyzing trace with hash 415, now seen corresponding path program 1 times [2023-11-19 08:03:47,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:03:47,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118929900] [2023-11-19 08:03:47,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:47,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:03:47,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:47,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:03:47,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:03:47,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118929900] [2023-11-19 08:03:47,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118929900] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:03:47,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:03:47,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-11-19 08:03:47,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145575865] [2023-11-19 08:03:47,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:03:47,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 08:03:47,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:03:47,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 08:03:47,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 08:03:47,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 204 [2023-11-19 08:03:47,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 64 flow. Second operand has 2 states, 2 states have (on average 91.5) internal successors, (183), 2 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:47,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:03:47,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 204 [2023-11-19 08:03:47,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:03:47,420 INFO L124 PetriNetUnfolderBase]: 129/228 cut-off events. [2023-11-19 08:03:47,420 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-11-19 08:03:47,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 471 conditions, 228 events. 129/228 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 731 event pairs, 105 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 388. Up to 225 conditions per place. [2023-11-19 08:03:47,429 INFO L140 encePairwiseOnDemand]: 201/204 looper letters, 22 selfloop transitions, 0 changer transitions 0/23 dead transitions. [2023-11-19 08:03:47,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 23 transitions, 102 flow [2023-11-19 08:03:47,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 08:03:47,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-19 08:03:47,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 207 transitions. [2023-11-19 08:03:47,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5073529411764706 [2023-11-19 08:03:47,454 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 207 transitions. [2023-11-19 08:03:47,455 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 207 transitions. [2023-11-19 08:03:47,457 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:03:47,461 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 207 transitions. [2023-11-19 08:03:47,470 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 103.5) internal successors, (207), 2 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:47,477 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 204.0) internal successors, (612), 3 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:47,479 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 204.0) internal successors, (612), 3 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:47,481 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 64 flow. Second operand 2 states and 207 transitions. [2023-11-19 08:03:47,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 23 transitions, 102 flow [2023-11-19 08:03:47,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 23 transitions, 94 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-19 08:03:47,488 INFO L231 Difference]: Finished difference. Result has 25 places, 23 transitions, 50 flow [2023-11-19 08:03:47,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=50, PETRI_PLACES=25, PETRI_TRANSITIONS=23} [2023-11-19 08:03:47,498 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, -6 predicate places. [2023-11-19 08:03:47,499 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 23 transitions, 50 flow [2023-11-19 08:03:47,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 91.5) internal successors, (183), 2 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:47,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:03:47,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-19 08:03:47,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 08:03:47,500 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-19 08:03:47,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:03:47,501 INFO L85 PathProgramCache]: Analyzing trace with hash 405965, now seen corresponding path program 1 times [2023-11-19 08:03:47,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:03:47,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676514638] [2023-11-19 08:03:47,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:47,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:03:47,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:47,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:03:47,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:03:47,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676514638] [2023-11-19 08:03:47,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676514638] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:03:47,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:03:47,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 08:03:47,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069941758] [2023-11-19 08:03:47,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:03:47,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:03:47,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:03:47,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:03:47,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:03:47,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 204 [2023-11-19 08:03:47,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 23 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:47,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:03:47,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 204 [2023-11-19 08:03:47,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:03:47,900 INFO L124 PetriNetUnfolderBase]: 121/212 cut-off events. [2023-11-19 08:03:47,901 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-19 08:03:47,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 429 conditions, 212 events. 121/212 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 674 event pairs, 99 based on Foata normal form. 0/134 useless extension candidates. Maximal degree in co-relation 426. Up to 209 conditions per place. [2023-11-19 08:03:47,910 INFO L140 encePairwiseOnDemand]: 201/204 looper letters, 19 selfloop transitions, 1 changer transitions 0/21 dead transitions. [2023-11-19 08:03:47,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 21 transitions, 86 flow [2023-11-19 08:03:47,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:03:47,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:03:47,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 265 transitions. [2023-11-19 08:03:47,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43300653594771243 [2023-11-19 08:03:47,921 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 265 transitions. [2023-11-19 08:03:47,921 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 265 transitions. [2023-11-19 08:03:47,922 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:03:47,922 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 265 transitions. [2023-11-19 08:03:47,926 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 88.33333333333333) internal successors, (265), 3 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:47,929 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 204.0) internal successors, (816), 4 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:47,930 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 204.0) internal successors, (816), 4 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:47,930 INFO L175 Difference]: Start difference. First operand has 25 places, 23 transitions, 50 flow. Second operand 3 states and 265 transitions. [2023-11-19 08:03:47,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 21 transitions, 86 flow [2023-11-19 08:03:47,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 21 transitions, 86 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 08:03:47,932 INFO L231 Difference]: Finished difference. Result has 25 places, 21 transitions, 48 flow [2023-11-19 08:03:47,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=48, PETRI_PLACES=25, PETRI_TRANSITIONS=21} [2023-11-19 08:03:47,933 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, -6 predicate places. [2023-11-19 08:03:47,933 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 21 transitions, 48 flow [2023-11-19 08:03:47,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:47,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:03:47,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-19 08:03:47,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 08:03:47,934 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-19 08:03:47,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:03:47,938 INFO L85 PathProgramCache]: Analyzing trace with hash 405964, now seen corresponding path program 1 times [2023-11-19 08:03:47,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:03:47,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004753720] [2023-11-19 08:03:47,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:47,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:03:47,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:48,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:03:48,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:03:48,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004753720] [2023-11-19 08:03:48,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004753720] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:03:48,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:03:48,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 08:03:48,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211258346] [2023-11-19 08:03:48,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:03:48,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:03:48,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:03:48,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:03:48,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:03:48,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 204 [2023-11-19 08:03:48,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 21 transitions, 48 flow. Second operand has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:48,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:03:48,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 204 [2023-11-19 08:03:48,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:03:48,227 INFO L124 PetriNetUnfolderBase]: 113/196 cut-off events. [2023-11-19 08:03:48,227 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-19 08:03:48,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 400 conditions, 196 events. 113/196 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 607 event pairs, 93 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 396. Up to 194 conditions per place. [2023-11-19 08:03:48,230 INFO L140 encePairwiseOnDemand]: 201/204 looper letters, 17 selfloop transitions, 1 changer transitions 0/19 dead transitions. [2023-11-19 08:03:48,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 19 transitions, 80 flow [2023-11-19 08:03:48,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:03:48,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:03:48,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 275 transitions. [2023-11-19 08:03:48,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4493464052287582 [2023-11-19 08:03:48,232 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 275 transitions. [2023-11-19 08:03:48,233 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 275 transitions. [2023-11-19 08:03:48,233 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:03:48,233 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 275 transitions. [2023-11-19 08:03:48,235 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:48,238 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 204.0) internal successors, (816), 4 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:48,239 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 204.0) internal successors, (816), 4 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:48,239 INFO L175 Difference]: Start difference. First operand has 25 places, 21 transitions, 48 flow. Second operand 3 states and 275 transitions. [2023-11-19 08:03:48,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 19 transitions, 80 flow [2023-11-19 08:03:48,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 19 transitions, 79 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 08:03:48,241 INFO L231 Difference]: Finished difference. Result has 24 places, 19 transitions, 45 flow [2023-11-19 08:03:48,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=43, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=45, PETRI_PLACES=24, PETRI_TRANSITIONS=19} [2023-11-19 08:03:48,243 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, -7 predicate places. [2023-11-19 08:03:48,243 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 19 transitions, 45 flow [2023-11-19 08:03:48,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:48,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:03:48,244 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 08:03:48,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 08:03:48,250 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-19 08:03:48,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:03:48,251 INFO L85 PathProgramCache]: Analyzing trace with hash 390142440, now seen corresponding path program 1 times [2023-11-19 08:03:48,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:03:48,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652736324] [2023-11-19 08:03:48,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:48,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:03:48,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:48,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:03:48,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:03:48,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652736324] [2023-11-19 08:03:48,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652736324] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:03:48,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:03:48,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 08:03:48,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189865148] [2023-11-19 08:03:48,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:03:48,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:03:48,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:03:48,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:03:48,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:03:48,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 204 [2023-11-19 08:03:48,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 19 transitions, 45 flow. Second operand has 4 states, 4 states have (on average 78.25) internal successors, (313), 4 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:48,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:03:48,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 204 [2023-11-19 08:03:48,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:03:48,501 INFO L124 PetriNetUnfolderBase]: 85/152 cut-off events. [2023-11-19 08:03:48,501 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-19 08:03:48,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 313 conditions, 152 events. 85/152 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 426 event pairs, 69 based on Foata normal form. 0/108 useless extension candidates. Maximal degree in co-relation 309. Up to 150 conditions per place. [2023-11-19 08:03:48,503 INFO L140 encePairwiseOnDemand]: 202/204 looper letters, 16 selfloop transitions, 1 changer transitions 0/18 dead transitions. [2023-11-19 08:03:48,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 18 transitions, 77 flow [2023-11-19 08:03:48,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:03:48,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:03:48,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 249 transitions. [2023-11-19 08:03:48,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4068627450980392 [2023-11-19 08:03:48,506 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 249 transitions. [2023-11-19 08:03:48,507 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 249 transitions. [2023-11-19 08:03:48,508 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:03:48,508 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 249 transitions. [2023-11-19 08:03:48,509 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 83.0) internal successors, (249), 3 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:48,511 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 204.0) internal successors, (816), 4 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:48,512 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 204.0) internal successors, (816), 4 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:48,512 INFO L175 Difference]: Start difference. First operand has 24 places, 19 transitions, 45 flow. Second operand 3 states and 249 transitions. [2023-11-19 08:03:48,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 18 transitions, 77 flow [2023-11-19 08:03:48,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 18 transitions, 76 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 08:03:48,514 INFO L231 Difference]: Finished difference. Result has 24 places, 18 transitions, 44 flow [2023-11-19 08:03:48,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=44, PETRI_PLACES=24, PETRI_TRANSITIONS=18} [2023-11-19 08:03:48,516 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, -7 predicate places. [2023-11-19 08:03:48,517 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 18 transitions, 44 flow [2023-11-19 08:03:48,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 78.25) internal successors, (313), 4 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:48,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:03:48,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 08:03:48,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 08:03:48,518 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-19 08:03:48,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:03:48,518 INFO L85 PathProgramCache]: Analyzing trace with hash 390142441, now seen corresponding path program 1 times [2023-11-19 08:03:48,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:03:48,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336858405] [2023-11-19 08:03:48,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:48,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:03:48,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:48,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:03:48,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:03:48,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336858405] [2023-11-19 08:03:48,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336858405] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:03:48,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:03:48,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 08:03:48,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134653175] [2023-11-19 08:03:48,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:03:48,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:03:48,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:03:48,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:03:48,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:03:48,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 204 [2023-11-19 08:03:48,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 18 transitions, 44 flow. Second operand has 3 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:48,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:03:48,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 204 [2023-11-19 08:03:48,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:03:48,687 INFO L124 PetriNetUnfolderBase]: 57/108 cut-off events. [2023-11-19 08:03:48,688 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-19 08:03:48,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 226 conditions, 108 events. 57/108 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 267 event pairs, 45 based on Foata normal form. 0/88 useless extension candidates. Maximal degree in co-relation 222. Up to 106 conditions per place. [2023-11-19 08:03:48,689 INFO L140 encePairwiseOnDemand]: 202/204 looper letters, 15 selfloop transitions, 1 changer transitions 0/17 dead transitions. [2023-11-19 08:03:48,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 17 transitions, 74 flow [2023-11-19 08:03:48,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:03:48,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:03:48,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 263 transitions. [2023-11-19 08:03:48,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4297385620915033 [2023-11-19 08:03:48,693 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 263 transitions. [2023-11-19 08:03:48,693 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 263 transitions. [2023-11-19 08:03:48,693 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:03:48,694 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 263 transitions. [2023-11-19 08:03:48,696 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:48,698 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 204.0) internal successors, (816), 4 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:48,699 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 204.0) internal successors, (816), 4 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:48,699 INFO L175 Difference]: Start difference. First operand has 24 places, 18 transitions, 44 flow. Second operand 3 states and 263 transitions. [2023-11-19 08:03:48,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 17 transitions, 74 flow [2023-11-19 08:03:48,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 17 transitions, 73 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 08:03:48,701 INFO L231 Difference]: Finished difference. Result has 24 places, 17 transitions, 43 flow [2023-11-19 08:03:48,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=41, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=43, PETRI_PLACES=24, PETRI_TRANSITIONS=17} [2023-11-19 08:03:48,705 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, -7 predicate places. [2023-11-19 08:03:48,705 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 17 transitions, 43 flow [2023-11-19 08:03:48,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:48,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:03:48,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:03:48,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 08:03:48,707 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-19 08:03:48,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:03:48,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1237611836, now seen corresponding path program 1 times [2023-11-19 08:03:48,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:03:48,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122471685] [2023-11-19 08:03:48,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:48,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:03:48,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:48,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:03:48,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:03:48,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122471685] [2023-11-19 08:03:48,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122471685] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:03:48,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:03:48,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:03:48,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192336595] [2023-11-19 08:03:48,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:03:48,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:03:48,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:03:48,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:03:48,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:03:48,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 204 [2023-11-19 08:03:48,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 17 transitions, 43 flow. Second operand has 4 states, 4 states have (on average 89.25) internal successors, (357), 4 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:48,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:03:48,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 204 [2023-11-19 08:03:48,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:03:49,125 INFO L124 PetriNetUnfolderBase]: 103/178 cut-off events. [2023-11-19 08:03:49,126 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 08:03:49,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 368 conditions, 178 events. 103/178 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 492 event pairs, 19 based on Foata normal form. 0/152 useless extension candidates. Maximal degree in co-relation 364. Up to 83 conditions per place. [2023-11-19 08:03:49,129 INFO L140 encePairwiseOnDemand]: 199/204 looper letters, 30 selfloop transitions, 5 changer transitions 2/37 dead transitions. [2023-11-19 08:03:49,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 37 transitions, 158 flow [2023-11-19 08:03:49,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 08:03:49,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 08:03:49,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 469 transitions. [2023-11-19 08:03:49,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4598039215686274 [2023-11-19 08:03:49,133 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 469 transitions. [2023-11-19 08:03:49,133 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 469 transitions. [2023-11-19 08:03:49,135 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:03:49,135 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 469 transitions. [2023-11-19 08:03:49,137 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 93.8) internal successors, (469), 5 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:49,140 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 204.0) internal successors, (1224), 6 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:49,142 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 204.0) internal successors, (1224), 6 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:49,142 INFO L175 Difference]: Start difference. First operand has 24 places, 17 transitions, 43 flow. Second operand 5 states and 469 transitions. [2023-11-19 08:03:49,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 37 transitions, 158 flow [2023-11-19 08:03:49,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 37 transitions, 157 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 08:03:49,145 INFO L231 Difference]: Finished difference. Result has 30 places, 21 transitions, 79 flow [2023-11-19 08:03:49,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=79, PETRI_PLACES=30, PETRI_TRANSITIONS=21} [2023-11-19 08:03:49,147 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, -1 predicate places. [2023-11-19 08:03:49,148 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 21 transitions, 79 flow [2023-11-19 08:03:49,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 89.25) internal successors, (357), 4 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:49,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:03:49,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:03:49,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 08:03:49,149 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-19 08:03:49,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:03:49,149 INFO L85 PathProgramCache]: Analyzing trace with hash 516603475, now seen corresponding path program 1 times [2023-11-19 08:03:49,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:03:49,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125401136] [2023-11-19 08:03:49,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:49,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:03:49,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:50,126 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:03:50,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:03:50,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125401136] [2023-11-19 08:03:50,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125401136] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:03:50,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957505902] [2023-11-19 08:03:50,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:50,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:03:50,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13cddac2-9167-4641-bda5-a3d35b5bb8ff/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:03:50,135 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13cddac2-9167-4641-bda5-a3d35b5bb8ff/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:03:50,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13cddac2-9167-4641-bda5-a3d35b5bb8ff/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 08:03:50,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:50,426 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-19 08:03:50,432 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:03:51,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:03:51,121 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:03:51,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:03:51,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957505902] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:03:51,651 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:03:51,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 17 [2023-11-19 08:03:51,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49541078] [2023-11-19 08:03:51,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:03:51,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-19 08:03:51,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:03:51,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-19 08:03:51,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2023-11-19 08:03:52,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 204 [2023-11-19 08:03:52,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 21 transitions, 79 flow. Second operand has 19 states, 19 states have (on average 76.36842105263158) internal successors, (1451), 19 states have internal predecessors, (1451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:52,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:03:52,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 204 [2023-11-19 08:03:52,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:03:54,393 INFO L124 PetriNetUnfolderBase]: 408/694 cut-off events. [2023-11-19 08:03:54,393 INFO L125 PetriNetUnfolderBase]: For 260/260 co-relation queries the response was YES. [2023-11-19 08:03:54,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1779 conditions, 694 events. 408/694 cut-off events. For 260/260 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 2898 event pairs, 6 based on Foata normal form. 3/611 useless extension candidates. Maximal degree in co-relation 1772. Up to 125 conditions per place. [2023-11-19 08:03:54,404 INFO L140 encePairwiseOnDemand]: 194/204 looper letters, 95 selfloop transitions, 78 changer transitions 32/205 dead transitions. [2023-11-19 08:03:54,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 205 transitions, 1056 flow [2023-11-19 08:03:54,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-19 08:03:54,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-11-19 08:03:54,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2937 transitions. [2023-11-19 08:03:54,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38910969793322736 [2023-11-19 08:03:54,420 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2937 transitions. [2023-11-19 08:03:54,420 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2937 transitions. [2023-11-19 08:03:54,422 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:03:54,423 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2937 transitions. [2023-11-19 08:03:54,432 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 79.37837837837837) internal successors, (2937), 37 states have internal predecessors, (2937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:54,448 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 204.0) internal successors, (7752), 38 states have internal predecessors, (7752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:54,454 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 204.0) internal successors, (7752), 38 states have internal predecessors, (7752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:54,454 INFO L175 Difference]: Start difference. First operand has 30 places, 21 transitions, 79 flow. Second operand 37 states and 2937 transitions. [2023-11-19 08:03:54,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 205 transitions, 1056 flow [2023-11-19 08:03:54,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 205 transitions, 1047 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 08:03:54,465 INFO L231 Difference]: Finished difference. Result has 86 places, 107 transitions, 673 flow [2023-11-19 08:03:54,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=673, PETRI_PLACES=86, PETRI_TRANSITIONS=107} [2023-11-19 08:03:54,466 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 55 predicate places. [2023-11-19 08:03:54,467 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 107 transitions, 673 flow [2023-11-19 08:03:54,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 76.36842105263158) internal successors, (1451), 19 states have internal predecessors, (1451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:54,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:03:54,468 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:03:54,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13cddac2-9167-4641-bda5-a3d35b5bb8ff/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 08:03:54,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13cddac2-9167-4641-bda5-a3d35b5bb8ff/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:03:54,682 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-19 08:03:54,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:03:54,682 INFO L85 PathProgramCache]: Analyzing trace with hash 471984678, now seen corresponding path program 2 times [2023-11-19 08:03:54,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:03:54,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662098708] [2023-11-19 08:03:54,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:54,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:03:54,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:55,062 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:03:55,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:03:55,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662098708] [2023-11-19 08:03:55,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662098708] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:03:55,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:03:55,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 08:03:55,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108444403] [2023-11-19 08:03:55,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:03:55,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 08:03:55,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:03:55,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 08:03:55,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 08:03:55,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 204 [2023-11-19 08:03:55,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 107 transitions, 673 flow. Second operand has 5 states, 5 states have (on average 84.4) internal successors, (422), 5 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:55,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:03:55,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 204 [2023-11-19 08:03:55,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:03:55,575 INFO L124 PetriNetUnfolderBase]: 448/763 cut-off events. [2023-11-19 08:03:55,576 INFO L125 PetriNetUnfolderBase]: For 3516/3516 co-relation queries the response was YES. [2023-11-19 08:03:55,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3090 conditions, 763 events. 448/763 cut-off events. For 3516/3516 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3215 event pairs, 8 based on Foata normal form. 12/745 useless extension candidates. Maximal degree in co-relation 3062. Up to 405 conditions per place. [2023-11-19 08:03:55,589 INFO L140 encePairwiseOnDemand]: 196/204 looper letters, 100 selfloop transitions, 75 changer transitions 0/175 dead transitions. [2023-11-19 08:03:55,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 175 transitions, 1439 flow [2023-11-19 08:03:55,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 08:03:55,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-19 08:03:55,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 786 transitions. [2023-11-19 08:03:55,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42810457516339867 [2023-11-19 08:03:55,595 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 786 transitions. [2023-11-19 08:03:55,596 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 786 transitions. [2023-11-19 08:03:55,596 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:03:55,597 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 786 transitions. [2023-11-19 08:03:55,600 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 87.33333333333333) internal successors, (786), 9 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:55,604 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 204.0) internal successors, (2040), 10 states have internal predecessors, (2040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:55,605 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 204.0) internal successors, (2040), 10 states have internal predecessors, (2040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:55,606 INFO L175 Difference]: Start difference. First operand has 86 places, 107 transitions, 673 flow. Second operand 9 states and 786 transitions. [2023-11-19 08:03:55,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 175 transitions, 1439 flow [2023-11-19 08:03:55,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 175 transitions, 1388 flow, removed 23 selfloop flow, removed 4 redundant places. [2023-11-19 08:03:55,641 INFO L231 Difference]: Finished difference. Result has 90 places, 141 transitions, 1156 flow [2023-11-19 08:03:55,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=630, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1156, PETRI_PLACES=90, PETRI_TRANSITIONS=141} [2023-11-19 08:03:55,643 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 59 predicate places. [2023-11-19 08:03:55,643 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 141 transitions, 1156 flow [2023-11-19 08:03:55,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 84.4) internal successors, (422), 5 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:55,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:03:55,644 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:03:55,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 08:03:55,645 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-19 08:03:55,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:03:55,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1641923269, now seen corresponding path program 1 times [2023-11-19 08:03:55,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:03:55,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194623433] [2023-11-19 08:03:55,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:55,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:03:55,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:57,460 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:03:57,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:03:57,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194623433] [2023-11-19 08:03:57,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194623433] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:03:57,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903840812] [2023-11-19 08:03:57,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:57,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:03:57,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13cddac2-9167-4641-bda5-a3d35b5bb8ff/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:03:57,466 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13cddac2-9167-4641-bda5-a3d35b5bb8ff/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:03:57,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13cddac2-9167-4641-bda5-a3d35b5bb8ff/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 08:03:57,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:57,669 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-19 08:03:57,672 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:03:58,834 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:03:58,834 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:04:00,668 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:04:00,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903840812] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:04:00,669 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:04:00,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 23 [2023-11-19 08:04:00,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575824711] [2023-11-19 08:04:00,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:04:00,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-19 08:04:00,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:04:00,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-19 08:04:00,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2023-11-19 08:04:01,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 204 [2023-11-19 08:04:01,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 141 transitions, 1156 flow. Second operand has 25 states, 25 states have (on average 80.28) internal successors, (2007), 25 states have internal predecessors, (2007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:01,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:04:01,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 204 [2023-11-19 08:04:01,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:04:12,389 INFO L124 PetriNetUnfolderBase]: 1127/1982 cut-off events. [2023-11-19 08:04:12,390 INFO L125 PetriNetUnfolderBase]: For 10711/10711 co-relation queries the response was YES. [2023-11-19 08:04:12,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9246 conditions, 1982 events. 1127/1982 cut-off events. For 10711/10711 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 10656 event pairs, 1 based on Foata normal form. 16/1998 useless extension candidates. Maximal degree in co-relation 9217. Up to 462 conditions per place. [2023-11-19 08:04:12,424 INFO L140 encePairwiseOnDemand]: 196/204 looper letters, 213 selfloop transitions, 205 changer transitions 115/533 dead transitions. [2023-11-19 08:04:12,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 533 transitions, 5012 flow [2023-11-19 08:04:12,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-11-19 08:04:12,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-11-19 08:04:12,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 4102 transitions. [2023-11-19 08:04:12,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4103641456582633 [2023-11-19 08:04:12,449 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 4102 transitions. [2023-11-19 08:04:12,449 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 4102 transitions. [2023-11-19 08:04:12,454 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:04:12,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 4102 transitions. [2023-11-19 08:04:12,470 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 83.71428571428571) internal successors, (4102), 49 states have internal predecessors, (4102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:12,494 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 204.0) internal successors, (10200), 50 states have internal predecessors, (10200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:12,499 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 204.0) internal successors, (10200), 50 states have internal predecessors, (10200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:12,500 INFO L175 Difference]: Start difference. First operand has 90 places, 141 transitions, 1156 flow. Second operand 49 states and 4102 transitions. [2023-11-19 08:04:12,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 533 transitions, 5012 flow [2023-11-19 08:04:12,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 533 transitions, 4936 flow, removed 32 selfloop flow, removed 4 redundant places. [2023-11-19 08:04:12,609 INFO L231 Difference]: Finished difference. Result has 156 places, 310 transitions, 3354 flow [2023-11-19 08:04:12,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=1114, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=3354, PETRI_PLACES=156, PETRI_TRANSITIONS=310} [2023-11-19 08:04:12,611 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 125 predicate places. [2023-11-19 08:04:12,611 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 310 transitions, 3354 flow [2023-11-19 08:04:12,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 80.28) internal successors, (2007), 25 states have internal predecessors, (2007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:12,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:04:12,613 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:04:12,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13cddac2-9167-4641-bda5-a3d35b5bb8ff/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 08:04:12,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13cddac2-9167-4641-bda5-a3d35b5bb8ff/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:04:12,828 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-19 08:04:12,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:04:12,828 INFO L85 PathProgramCache]: Analyzing trace with hash 673237047, now seen corresponding path program 2 times [2023-11-19 08:04:12,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:04:12,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141997710] [2023-11-19 08:04:12,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:12,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:04:12,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:14,572 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:04:14,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:04:14,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141997710] [2023-11-19 08:04:14,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141997710] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:04:14,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605520482] [2023-11-19 08:04:14,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 08:04:14,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:04:14,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13cddac2-9167-4641-bda5-a3d35b5bb8ff/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:04:14,574 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13cddac2-9167-4641-bda5-a3d35b5bb8ff/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:04:14,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13cddac2-9167-4641-bda5-a3d35b5bb8ff/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 08:04:14,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 08:04:14,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:04:14,859 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-19 08:04:14,862 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:04:16,216 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:04:16,216 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:04:18,440 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:04:18,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605520482] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:04:18,441 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:04:18,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 24 [2023-11-19 08:04:18,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158812466] [2023-11-19 08:04:18,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:04:18,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-19 08:04:18,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:04:18,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-19 08:04:18,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=514, Unknown=0, NotChecked=0, Total=650 [2023-11-19 08:04:19,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 204 [2023-11-19 08:04:19,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 310 transitions, 3354 flow. Second operand has 26 states, 26 states have (on average 76.03846153846153) internal successors, (1977), 26 states have internal predecessors, (1977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:19,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:04:19,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 204 [2023-11-19 08:04:19,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand