./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14c77128-65d0-4963-b700-a6c279721588/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14c77128-65d0-4963-b700-a6c279721588/bin/uautomizer-verify-4GaUIPS5ZU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14c77128-65d0-4963-b700-a6c279721588/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14c77128-65d0-4963-b700-a6c279721588/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14c77128-65d0-4963-b700-a6c279721588/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14c77128-65d0-4963-b700-a6c279721588/bin/uautomizer-verify-4GaUIPS5ZU --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 20832c4ec3f8ccecbcf7cfcec0aecbbc925bfb9e6d8397db46b5825bb40681b3 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-10-31 22:00:08,988 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 22:00:09,064 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14c77128-65d0-4963-b700-a6c279721588/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-31 22:00:09,068 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 22:00:09,069 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 22:00:09,092 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 22:00:09,092 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 22:00:09,093 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 22:00:09,093 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 22:00:09,094 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 22:00:09,094 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 22:00:09,094 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 22:00:09,095 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 22:00:09,095 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 22:00:09,096 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 22:00:09,096 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 22:00:09,096 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 22:00:09,097 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 22:00:09,097 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 22:00:09,097 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 22:00:09,098 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-31 22:00:09,101 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-31 22:00:09,101 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-31 22:00:09,101 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 22:00:09,102 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-31 22:00:09,102 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 22:00:09,102 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-31 22:00:09,103 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 22:00:09,103 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 22:00:09,103 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 22:00:09,108 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 22:00:09,108 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 22:00:09,108 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 22:00:09,109 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:00:09,109 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 22:00:09,109 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 22:00:09,110 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 22:00:09,110 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 22:00:09,110 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 22:00:09,110 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 22:00:09,111 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 22:00:09,113 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 22:00:09,114 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_14c77128-65d0-4963-b700-a6c279721588/bin/uautomizer-verify-4GaUIPS5ZU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14c77128-65d0-4963-b700-a6c279721588/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 20832c4ec3f8ccecbcf7cfcec0aecbbc925bfb9e6d8397db46b5825bb40681b3 [2024-10-31 22:00:09,444 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 22:00:09,471 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 22:00:09,474 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 22:00:09,475 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 22:00:09,476 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 22:00:09,477 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14c77128-65d0-4963-b700-a6c279721588/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c Unable to find full path for "g++" [2024-10-31 22:00:11,865 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 22:00:12,049 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 22:00:12,049 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14c77128-65d0-4963-b700-a6c279721588/sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c [2024-10-31 22:00:12,058 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14c77128-65d0-4963-b700-a6c279721588/bin/uautomizer-verify-4GaUIPS5ZU/data/08ba09e82/d8583bef34824965bd2aae6861d999c9/FLAG404831e21 [2024-10-31 22:00:12,070 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14c77128-65d0-4963-b700-a6c279721588/bin/uautomizer-verify-4GaUIPS5ZU/data/08ba09e82/d8583bef34824965bd2aae6861d999c9 [2024-10-31 22:00:12,073 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 22:00:12,075 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 22:00:12,077 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 22:00:12,077 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 22:00:12,083 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 22:00:12,083 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:00:12" (1/1) ... [2024-10-31 22:00:12,084 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f69bdfb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:12, skipping insertion in model container [2024-10-31 22:00:12,085 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:00:12" (1/1) ... [2024-10-31 22:00:12,113 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 22:00:12,361 WARN L1053 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-10-31 22:00:12,368 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:00:12,382 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 22:00:12,409 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:00:12,429 INFO L204 MainTranslator]: Completed translation [2024-10-31 22:00:12,430 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:12 WrapperNode [2024-10-31 22:00:12,430 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 22:00:12,431 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 22:00:12,432 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 22:00:12,432 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 22:00:12,440 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:12" (1/1) ... [2024-10-31 22:00:12,452 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:12" (1/1) ... [2024-10-31 22:00:12,496 INFO L138 Inliner]: procedures = 25, calls = 31, calls flagged for inlining = 16, calls inlined = 28, statements flattened = 267 [2024-10-31 22:00:12,501 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 22:00:12,502 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 22:00:12,502 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 22:00:12,502 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 22:00:12,515 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:12" (1/1) ... [2024-10-31 22:00:12,515 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:12" (1/1) ... [2024-10-31 22:00:12,519 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:12" (1/1) ... [2024-10-31 22:00:12,538 INFO L175 MemorySlicer]: Split 11 memory accesses to 2 slices as follows [2, 9]. 82 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 4 writes are split as follows [0, 4]. [2024-10-31 22:00:12,539 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:12" (1/1) ... [2024-10-31 22:00:12,539 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:12" (1/1) ... [2024-10-31 22:00:12,553 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:12" (1/1) ... [2024-10-31 22:00:12,562 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:12" (1/1) ... [2024-10-31 22:00:12,565 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:12" (1/1) ... [2024-10-31 22:00:12,570 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:12" (1/1) ... [2024-10-31 22:00:12,577 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 22:00:12,578 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 22:00:12,580 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 22:00:12,580 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 22:00:12,581 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:12" (1/1) ... [2024-10-31 22:00:12,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:00:12,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14c77128-65d0-4963-b700-a6c279721588/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:00:12,620 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14c77128-65d0-4963-b700-a6c279721588/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 22:00:12,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14c77128-65d0-4963-b700-a6c279721588/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 22:00:12,657 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 22:00:12,657 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-31 22:00:12,658 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-31 22:00:12,658 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-31 22:00:12,658 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-31 22:00:12,658 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-10-31 22:00:12,658 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-10-31 22:00:12,659 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-31 22:00:12,659 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-31 22:00:12,659 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-31 22:00:12,659 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-31 22:00:12,659 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-31 22:00:12,660 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 22:00:12,660 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 22:00:12,660 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-31 22:00:12,660 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-31 22:00:12,663 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-31 22:00:12,818 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 22:00:12,824 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 22:00:13,475 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-31 22:00:13,475 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 22:00:13,943 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 22:00:13,948 INFO L316 CfgBuilder]: Removed 6 assume(true) statements. [2024-10-31 22:00:13,948 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:00:13 BoogieIcfgContainer [2024-10-31 22:00:13,949 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 22:00:13,951 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 22:00:13,958 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 22:00:13,962 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 22:00:13,967 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 10:00:12" (1/3) ... [2024-10-31 22:00:13,968 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d03a67b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:00:13, skipping insertion in model container [2024-10-31 22:00:13,968 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:12" (2/3) ... [2024-10-31 22:00:13,969 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d03a67b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:00:13, skipping insertion in model container [2024-10-31 22:00:13,969 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:00:13" (3/3) ... [2024-10-31 22:00:13,970 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-three-array-sum-alt.wvr.c [2024-10-31 22:00:13,991 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 22:00:13,991 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2024-10-31 22:00:13,991 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-31 22:00:14,095 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-10-31 22:00:14,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 64 places, 60 transitions, 141 flow [2024-10-31 22:00:14,179 INFO L124 PetriNetUnfolderBase]: 6/57 cut-off events. [2024-10-31 22:00:14,179 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-10-31 22:00:14,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70 conditions, 57 events. 6/57 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 113 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 36. Up to 2 conditions per place. [2024-10-31 22:00:14,187 INFO L82 GeneralOperation]: Start removeDead. Operand has 64 places, 60 transitions, 141 flow [2024-10-31 22:00:14,191 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 60 places, 56 transitions, 130 flow [2024-10-31 22:00:14,206 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 22:00:14,215 INFO L333 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, 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;@2a572b2b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 22:00:14,216 INFO L334 AbstractCegarLoop]: Starting to check reachability of 35 error locations. [2024-10-31 22:00:14,222 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-31 22:00:14,222 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-10-31 22:00:14,223 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-31 22:00:14,223 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:00:14,223 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-31 22:00:14,224 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-31 22:00:14,230 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:14,231 INFO L85 PathProgramCache]: Analyzing trace with hash 900566, now seen corresponding path program 1 times [2024-10-31 22:00:14,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:14,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879084919] [2024-10-31 22:00:14,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:14,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:14,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:14,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:00:14,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:14,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879084919] [2024-10-31 22:00:14,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879084919] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:00:14,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:00:14,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-31 22:00:14,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111150657] [2024-10-31 22:00:14,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:00:14,586 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:00:14,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:14,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:00:14,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:00:14,678 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 60 [2024-10-31 22:00:14,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 56 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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) [2024-10-31 22:00:14,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:00:14,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 60 [2024-10-31 22:00:14,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:00:14,925 INFO L124 PetriNetUnfolderBase]: 306/579 cut-off events. [2024-10-31 22:00:14,925 INFO L125 PetriNetUnfolderBase]: For 39/39 co-relation queries the response was YES. [2024-10-31 22:00:14,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1080 conditions, 579 events. 306/579 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2477 event pairs, 202 based on Foata normal form. 1/500 useless extension candidates. Maximal degree in co-relation 906. Up to 441 conditions per place. [2024-10-31 22:00:14,933 INFO L140 encePairwiseOnDemand]: 54/60 looper letters, 29 selfloop transitions, 2 changer transitions 0/51 dead transitions. [2024-10-31 22:00:14,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 51 transitions, 182 flow [2024-10-31 22:00:14,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:00:14,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:00:14,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 107 transitions. [2024-10-31 22:00:14,949 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5944444444444444 [2024-10-31 22:00:14,952 INFO L175 Difference]: Start difference. First operand has 60 places, 56 transitions, 130 flow. Second operand 3 states and 107 transitions. [2024-10-31 22:00:14,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 51 transitions, 182 flow [2024-10-31 22:00:14,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 51 transitions, 170 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-10-31 22:00:14,961 INFO L231 Difference]: Finished difference. Result has 51 places, 51 transitions, 112 flow [2024-10-31 22:00:14,963 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=51, PETRI_TRANSITIONS=51} [2024-10-31 22:00:14,967 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, -9 predicate places. [2024-10-31 22:00:14,967 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 51 transitions, 112 flow [2024-10-31 22:00:14,968 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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) [2024-10-31 22:00:14,968 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:00:14,968 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-31 22:00:14,968 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 22:00:14,969 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-31 22:00:14,969 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:14,969 INFO L85 PathProgramCache]: Analyzing trace with hash 900567, now seen corresponding path program 1 times [2024-10-31 22:00:14,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:14,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983861179] [2024-10-31 22:00:14,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:14,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:14,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:15,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:00:15,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:15,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983861179] [2024-10-31 22:00:15,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983861179] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:00:15,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:00:15,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:00:15,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582469759] [2024-10-31 22:00:15,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:00:15,328 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:00:15,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:15,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:00:15,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:00:15,398 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 60 [2024-10-31 22:00:15,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 51 transitions, 112 flow. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 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) [2024-10-31 22:00:15,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:00:15,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 60 [2024-10-31 22:00:15,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:00:15,703 INFO L124 PetriNetUnfolderBase]: 306/578 cut-off events. [2024-10-31 22:00:15,703 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-10-31 22:00:15,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1047 conditions, 578 events. 306/578 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2465 event pairs, 202 based on Foata normal form. 0/497 useless extension candidates. Maximal degree in co-relation 1018. Up to 449 conditions per place. [2024-10-31 22:00:15,713 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 29 selfloop transitions, 4 changer transitions 0/50 dead transitions. [2024-10-31 22:00:15,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 50 transitions, 176 flow [2024-10-31 22:00:15,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:00:15,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:00:15,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 130 transitions. [2024-10-31 22:00:15,715 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-10-31 22:00:15,715 INFO L175 Difference]: Start difference. First operand has 51 places, 51 transitions, 112 flow. Second operand 4 states and 130 transitions. [2024-10-31 22:00:15,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 50 transitions, 176 flow [2024-10-31 22:00:15,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 50 transitions, 172 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:00:15,719 INFO L231 Difference]: Finished difference. Result has 51 places, 50 transitions, 114 flow [2024-10-31 22:00:15,719 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=114, PETRI_PLACES=51, PETRI_TRANSITIONS=50} [2024-10-31 22:00:15,720 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, -9 predicate places. [2024-10-31 22:00:15,721 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 50 transitions, 114 flow [2024-10-31 22:00:15,721 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 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) [2024-10-31 22:00:15,721 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:00:15,721 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-10-31 22:00:15,722 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-31 22:00:15,722 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-31 22:00:15,723 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:15,723 INFO L85 PathProgramCache]: Analyzing trace with hash 27918966, now seen corresponding path program 1 times [2024-10-31 22:00:15,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:15,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489135737] [2024-10-31 22:00:15,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:15,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:15,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:15,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:00:15,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:15,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489135737] [2024-10-31 22:00:15,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489135737] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:00:15,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:00:15,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:00:15,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563112492] [2024-10-31 22:00:15,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:00:15,897 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:00:15,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:15,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:00:15,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:00:15,925 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 60 [2024-10-31 22:00:15,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 50 transitions, 114 flow. Second operand has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 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) [2024-10-31 22:00:15,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:00:15,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 60 [2024-10-31 22:00:15,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:00:16,134 INFO L124 PetriNetUnfolderBase]: 309/591 cut-off events. [2024-10-31 22:00:16,134 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-10-31 22:00:16,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1074 conditions, 591 events. 309/591 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2541 event pairs, 202 based on Foata normal form. 0/508 useless extension candidates. Maximal degree in co-relation 1022. Up to 452 conditions per place. [2024-10-31 22:00:16,140 INFO L140 encePairwiseOnDemand]: 51/60 looper letters, 32 selfloop transitions, 10 changer transitions 0/61 dead transitions. [2024-10-31 22:00:16,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 61 transitions, 226 flow [2024-10-31 22:00:16,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:00:16,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:00:16,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 152 transitions. [2024-10-31 22:00:16,146 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2024-10-31 22:00:16,147 INFO L175 Difference]: Start difference. First operand has 51 places, 50 transitions, 114 flow. Second operand 4 states and 152 transitions. [2024-10-31 22:00:16,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 61 transitions, 226 flow [2024-10-31 22:00:16,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 61 transitions, 212 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-31 22:00:16,149 INFO L231 Difference]: Finished difference. Result has 53 places, 58 transitions, 168 flow [2024-10-31 22:00:16,151 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=168, PETRI_PLACES=53, PETRI_TRANSITIONS=58} [2024-10-31 22:00:16,152 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, -7 predicate places. [2024-10-31 22:00:16,153 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 58 transitions, 168 flow [2024-10-31 22:00:16,153 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 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) [2024-10-31 22:00:16,153 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:00:16,153 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-31 22:00:16,153 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-31 22:00:16,154 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-31 22:00:16,154 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:16,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1059916041, now seen corresponding path program 1 times [2024-10-31 22:00:16,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:16,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418061531] [2024-10-31 22:00:16,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:16,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:16,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:16,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:00:16,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:16,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418061531] [2024-10-31 22:00:16,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418061531] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:00:16,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301699058] [2024-10-31 22:00:16,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:16,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:00:16,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14c77128-65d0-4963-b700-a6c279721588/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:00:16,505 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14c77128-65d0-4963-b700-a6c279721588/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:00:16,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14c77128-65d0-4963-b700-a6c279721588/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-31 22:00:16,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:16,610 INFO L255 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-31 22:00:16,615 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:00:16,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-31 22:00:16,896 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-10-31 22:00:16,897 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 27 [2024-10-31 22:00:16,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:00:16,944 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:00:17,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:00:17,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301699058] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-31 22:00:17,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-31 22:00:17,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 3] total 10 [2024-10-31 22:00:17,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461440819] [2024-10-31 22:00:17,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:00:17,067 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:00:17,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:17,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:00:17,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-10-31 22:00:17,170 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 60 [2024-10-31 22:00:17,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 58 transitions, 168 flow. Second operand has 5 states, 5 states have (on average 25.2) internal successors, (126), 5 states have internal predecessors, (126), 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) [2024-10-31 22:00:17,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:00:17,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 60 [2024-10-31 22:00:17,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:00:17,656 INFO L124 PetriNetUnfolderBase]: 611/1156 cut-off events. [2024-10-31 22:00:17,656 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2024-10-31 22:00:17,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2117 conditions, 1156 events. 611/1156 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 5957 event pairs, 404 based on Foata normal form. 2/1011 useless extension candidates. Maximal degree in co-relation 1025. Up to 453 conditions per place. [2024-10-31 22:00:17,668 INFO L140 encePairwiseOnDemand]: 51/60 looper letters, 57 selfloop transitions, 9 changer transitions 0/83 dead transitions. [2024-10-31 22:00:17,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 83 transitions, 363 flow [2024-10-31 22:00:17,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:00:17,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:00:17,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 187 transitions. [2024-10-31 22:00:17,672 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6233333333333333 [2024-10-31 22:00:17,673 INFO L175 Difference]: Start difference. First operand has 53 places, 58 transitions, 168 flow. Second operand 5 states and 187 transitions. [2024-10-31 22:00:17,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 83 transitions, 363 flow [2024-10-31 22:00:17,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 83 transitions, 363 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-31 22:00:17,678 INFO L231 Difference]: Finished difference. Result has 58 places, 59 transitions, 201 flow [2024-10-31 22:00:17,678 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=201, PETRI_PLACES=58, PETRI_TRANSITIONS=59} [2024-10-31 22:00:17,679 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, -2 predicate places. [2024-10-31 22:00:17,680 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 59 transitions, 201 flow [2024-10-31 22:00:17,681 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.2) internal successors, (126), 5 states have internal predecessors, (126), 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) [2024-10-31 22:00:17,681 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:00:17,681 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-10-31 22:00:17,703 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14c77128-65d0-4963-b700-a6c279721588/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-31 22:00:17,886 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14c77128-65d0-4963-b700-a6c279721588/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:00:17,887 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-31 22:00:17,888 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:17,888 INFO L85 PathProgramCache]: Analyzing trace with hash 672095073, now seen corresponding path program 1 times [2024-10-31 22:00:17,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:17,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940137034] [2024-10-31 22:00:17,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:17,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:17,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:18,132 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:00:18,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:18,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940137034] [2024-10-31 22:00:18,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940137034] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:00:18,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865077322] [2024-10-31 22:00:18,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:18,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:00:18,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14c77128-65d0-4963-b700-a6c279721588/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:00:18,137 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14c77128-65d0-4963-b700-a6c279721588/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:00:18,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14c77128-65d0-4963-b700-a6c279721588/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-31 22:00:18,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:18,240 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-31 22:00:18,241 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:00:18,385 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:00:18,385 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:00:18,480 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:00:18,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865077322] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:00:18,481 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:00:18,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-10-31 22:00:18,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801206629] [2024-10-31 22:00:18,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:00:18,483 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-31 22:00:18,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:18,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-31 22:00:18,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-10-31 22:00:18,645 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 60 [2024-10-31 22:00:18,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 59 transitions, 201 flow. Second operand has 13 states, 13 states have (on average 28.53846153846154) internal successors, (371), 13 states have internal predecessors, (371), 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) [2024-10-31 22:00:18,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:00:18,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 60 [2024-10-31 22:00:18,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:00:19,284 INFO L124 PetriNetUnfolderBase]: 918/1741 cut-off events. [2024-10-31 22:00:19,285 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2024-10-31 22:00:19,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3217 conditions, 1741 events. 918/1741 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 8759 event pairs, 606 based on Foata normal form. 2/1519 useless extension candidates. Maximal degree in co-relation 1051. Up to 884 conditions per place. [2024-10-31 22:00:19,300 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 52 selfloop transitions, 29 changer transitions 0/100 dead transitions. [2024-10-31 22:00:19,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 100 transitions, 513 flow [2024-10-31 22:00:19,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-31 22:00:19,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-31 22:00:19,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 325 transitions. [2024-10-31 22:00:19,303 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6018518518518519 [2024-10-31 22:00:19,303 INFO L175 Difference]: Start difference. First operand has 58 places, 59 transitions, 201 flow. Second operand 9 states and 325 transitions. [2024-10-31 22:00:19,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 100 transitions, 513 flow [2024-10-31 22:00:19,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 100 transitions, 511 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-31 22:00:19,311 INFO L231 Difference]: Finished difference. Result has 67 places, 74 transitions, 369 flow [2024-10-31 22:00:19,312 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=369, PETRI_PLACES=67, PETRI_TRANSITIONS=74} [2024-10-31 22:00:19,313 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 7 predicate places. [2024-10-31 22:00:19,315 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 74 transitions, 369 flow [2024-10-31 22:00:19,315 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 28.53846153846154) internal successors, (371), 13 states have internal predecessors, (371), 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) [2024-10-31 22:00:19,316 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:00:19,316 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:00:19,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14c77128-65d0-4963-b700-a6c279721588/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-31 22:00:19,516 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14c77128-65d0-4963-b700-a6c279721588/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:00:19,517 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-31 22:00:19,518 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:19,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1148794552, now seen corresponding path program 1 times [2024-10-31 22:00:19,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:19,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722626405] [2024-10-31 22:00:19,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:19,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:19,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:19,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:00:19,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:19,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722626405] [2024-10-31 22:00:19,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722626405] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:00:19,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:00:19,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-31 22:00:19,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829960123] [2024-10-31 22:00:19,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:00:19,616 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:00:19,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:19,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:00:19,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:00:19,646 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2024-10-31 22:00:19,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 74 transitions, 369 flow. Second operand has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 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) [2024-10-31 22:00:19,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:00:19,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2024-10-31 22:00:19,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:00:20,182 INFO L124 PetriNetUnfolderBase]: 1322/2481 cut-off events. [2024-10-31 22:00:20,182 INFO L125 PetriNetUnfolderBase]: For 65/65 co-relation queries the response was YES. [2024-10-31 22:00:20,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4647 conditions, 2481 events. 1322/2481 cut-off events. For 65/65 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 13718 event pairs, 808 based on Foata normal form. 0/2109 useless extension candidates. Maximal degree in co-relation 1871. Up to 1153 conditions per place. [2024-10-31 22:00:20,202 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 72 selfloop transitions, 20 changer transitions 0/110 dead transitions. [2024-10-31 22:00:20,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 110 transitions, 647 flow [2024-10-31 22:00:20,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 22:00:20,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-31 22:00:20,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 233 transitions. [2024-10-31 22:00:20,204 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6472222222222223 [2024-10-31 22:00:20,204 INFO L175 Difference]: Start difference. First operand has 67 places, 74 transitions, 369 flow. Second operand 6 states and 233 transitions. [2024-10-31 22:00:20,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 110 transitions, 647 flow [2024-10-31 22:00:20,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 110 transitions, 573 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-10-31 22:00:20,213 INFO L231 Difference]: Finished difference. Result has 70 places, 76 transitions, 353 flow [2024-10-31 22:00:20,213 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=353, PETRI_PLACES=70, PETRI_TRANSITIONS=76} [2024-10-31 22:00:20,215 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 10 predicate places. [2024-10-31 22:00:20,216 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 76 transitions, 353 flow [2024-10-31 22:00:20,216 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 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) [2024-10-31 22:00:20,216 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:00:20,217 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1] [2024-10-31 22:00:20,217 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-31 22:00:20,218 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-31 22:00:20,218 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:20,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1219944564, now seen corresponding path program 2 times [2024-10-31 22:00:20,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:20,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244692738] [2024-10-31 22:00:20,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:20,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:20,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:20,627 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:00:20,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:20,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244692738] [2024-10-31 22:00:20,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244692738] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:00:20,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914722865] [2024-10-31 22:00:20,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 22:00:20,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:00:20,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14c77128-65d0-4963-b700-a6c279721588/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:00:20,631 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14c77128-65d0-4963-b700-a6c279721588/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:00:20,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14c77128-65d0-4963-b700-a6c279721588/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-31 22:00:20,739 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-31 22:00:20,739 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:00:20,741 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-10-31 22:00:20,743 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:00:20,776 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-31 22:00:20,974 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-10-31 22:00:20,974 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 20 [2024-10-31 22:00:21,138 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:00:21,138 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:00:21,492 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:00:21,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914722865] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:00:21,492 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:00:21,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 19 [2024-10-31 22:00:21,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40092005] [2024-10-31 22:00:21,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:00:21,494 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-31 22:00:21,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:21,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-31 22:00:21,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2024-10-31 22:00:23,119 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 60 [2024-10-31 22:00:23,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 76 transitions, 353 flow. Second operand has 21 states, 21 states have (on average 25.428571428571427) internal successors, (534), 21 states have internal predecessors, (534), 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) [2024-10-31 22:00:23,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:00:23,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 60 [2024-10-31 22:00:23,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:00:25,705 INFO L124 PetriNetUnfolderBase]: 1474/2962 cut-off events. [2024-10-31 22:00:25,705 INFO L125 PetriNetUnfolderBase]: For 742/791 co-relation queries the response was YES. [2024-10-31 22:00:25,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6185 conditions, 2962 events. 1474/2962 cut-off events. For 742/791 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 16957 event pairs, 1010 based on Foata normal form. 18/2597 useless extension candidates. Maximal degree in co-relation 2640. Up to 1703 conditions per place. [2024-10-31 22:00:25,728 INFO L140 encePairwiseOnDemand]: 48/60 looper letters, 74 selfloop transitions, 104 changer transitions 0/195 dead transitions. [2024-10-31 22:00:25,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 195 transitions, 1358 flow [2024-10-31 22:00:25,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-10-31 22:00:25,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-10-31 22:00:25,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 809 transitions. [2024-10-31 22:00:25,733 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5185897435897436 [2024-10-31 22:00:25,733 INFO L175 Difference]: Start difference. First operand has 70 places, 76 transitions, 353 flow. Second operand 26 states and 809 transitions. [2024-10-31 22:00:25,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 195 transitions, 1358 flow [2024-10-31 22:00:25,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 195 transitions, 1285 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-31 22:00:25,747 INFO L231 Difference]: Finished difference. Result has 104 places, 162 transitions, 1180 flow [2024-10-31 22:00:25,748 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=321, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1180, PETRI_PLACES=104, PETRI_TRANSITIONS=162} [2024-10-31 22:00:25,749 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 44 predicate places. [2024-10-31 22:00:25,749 INFO L471 AbstractCegarLoop]: Abstraction has has 104 places, 162 transitions, 1180 flow [2024-10-31 22:00:25,750 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 25.428571428571427) internal successors, (534), 21 states have internal predecessors, (534), 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) [2024-10-31 22:00:25,750 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:00:25,750 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:00:25,772 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14c77128-65d0-4963-b700-a6c279721588/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-31 22:00:25,956 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14c77128-65d0-4963-b700-a6c279721588/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:00:25,956 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-31 22:00:25,957 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:25,957 INFO L85 PathProgramCache]: Analyzing trace with hash 183154492, now seen corresponding path program 1 times [2024-10-31 22:00:25,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:25,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941665547] [2024-10-31 22:00:25,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:25,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:25,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:26,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:00:26,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:26,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941665547] [2024-10-31 22:00:26,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941665547] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:00:26,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:00:26,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-31 22:00:26,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625821541] [2024-10-31 22:00:26,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:00:26,061 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:00:26,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:26,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:00:26,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:00:26,085 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2024-10-31 22:00:26,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 162 transitions, 1180 flow. Second operand has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 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) [2024-10-31 22:00:26,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:00:26,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2024-10-31 22:00:26,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:00:26,730 INFO L124 PetriNetUnfolderBase]: 1683/3289 cut-off events. [2024-10-31 22:00:26,731 INFO L125 PetriNetUnfolderBase]: For 1256/1400 co-relation queries the response was YES. [2024-10-31 22:00:26,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7083 conditions, 3289 events. 1683/3289 cut-off events. For 1256/1400 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 18707 event pairs, 1058 based on Foata normal form. 0/2753 useless extension candidates. Maximal degree in co-relation 6952. Up to 1818 conditions per place. [2024-10-31 22:00:26,763 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 133 selfloop transitions, 41 changer transitions 0/192 dead transitions. [2024-10-31 22:00:26,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 192 transitions, 1628 flow [2024-10-31 22:00:26,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 22:00:26,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-31 22:00:26,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 230 transitions. [2024-10-31 22:00:26,767 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6388888888888888 [2024-10-31 22:00:26,767 INFO L175 Difference]: Start difference. First operand has 104 places, 162 transitions, 1180 flow. Second operand 6 states and 230 transitions. [2024-10-31 22:00:26,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 192 transitions, 1628 flow [2024-10-31 22:00:26,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 192 transitions, 1582 flow, removed 23 selfloop flow, removed 0 redundant places. [2024-10-31 22:00:26,785 INFO L231 Difference]: Finished difference. Result has 111 places, 164 transitions, 1235 flow [2024-10-31 22:00:26,785 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=1134, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1235, PETRI_PLACES=111, PETRI_TRANSITIONS=164} [2024-10-31 22:00:26,786 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 51 predicate places. [2024-10-31 22:00:26,786 INFO L471 AbstractCegarLoop]: Abstraction has has 111 places, 164 transitions, 1235 flow [2024-10-31 22:00:26,786 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 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) [2024-10-31 22:00:26,786 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:00:26,786 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:00:26,787 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-31 22:00:26,787 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-31 22:00:26,787 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:26,787 INFO L85 PathProgramCache]: Analyzing trace with hash -99082247, now seen corresponding path program 1 times [2024-10-31 22:00:26,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:26,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714112607] [2024-10-31 22:00:26,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:26,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:26,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:26,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:00:26,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:26,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714112607] [2024-10-31 22:00:26,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714112607] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:00:26,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:00:26,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-31 22:00:26,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393856436] [2024-10-31 22:00:26,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:00:26,888 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:00:26,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:26,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:00:26,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:00:26,946 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2024-10-31 22:00:26,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 164 transitions, 1235 flow. Second operand has 5 states, 5 states have (on average 28.2) internal successors, (141), 5 states have internal predecessors, (141), 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) [2024-10-31 22:00:26,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:00:26,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2024-10-31 22:00:26,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:00:27,457 INFO L124 PetriNetUnfolderBase]: 1348/2652 cut-off events. [2024-10-31 22:00:27,458 INFO L125 PetriNetUnfolderBase]: For 1720/1972 co-relation queries the response was YES. [2024-10-31 22:00:27,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6353 conditions, 2652 events. 1348/2652 cut-off events. For 1720/1972 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 14098 event pairs, 893 based on Foata normal form. 0/2279 useless extension candidates. Maximal degree in co-relation 6219. Up to 1626 conditions per place. [2024-10-31 22:00:27,484 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 126 selfloop transitions, 41 changer transitions 0/185 dead transitions. [2024-10-31 22:00:27,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 185 transitions, 1659 flow [2024-10-31 22:00:27,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 22:00:27,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-31 22:00:27,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 223 transitions. [2024-10-31 22:00:27,486 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6194444444444445 [2024-10-31 22:00:27,486 INFO L175 Difference]: Start difference. First operand has 111 places, 164 transitions, 1235 flow. Second operand 6 states and 223 transitions. [2024-10-31 22:00:27,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 185 transitions, 1659 flow [2024-10-31 22:00:27,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 185 transitions, 1570 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-10-31 22:00:27,502 INFO L231 Difference]: Finished difference. Result has 115 places, 166 transitions, 1255 flow [2024-10-31 22:00:27,503 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=1154, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1255, PETRI_PLACES=115, PETRI_TRANSITIONS=166} [2024-10-31 22:00:27,503 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 55 predicate places. [2024-10-31 22:00:27,504 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 166 transitions, 1255 flow [2024-10-31 22:00:27,504 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.2) internal successors, (141), 5 states have internal predecessors, (141), 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) [2024-10-31 22:00:27,504 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:00:27,504 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:00:27,504 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-31 22:00:27,504 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-31 22:00:27,505 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:27,505 INFO L85 PathProgramCache]: Analyzing trace with hash 379331070, now seen corresponding path program 1 times [2024-10-31 22:00:27,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:27,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908018613] [2024-10-31 22:00:27,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:27,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:27,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:28,003 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:00:28,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:28,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908018613] [2024-10-31 22:00:28,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908018613] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:00:28,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211435762] [2024-10-31 22:00:28,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:28,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:00:28,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14c77128-65d0-4963-b700-a6c279721588/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:00:28,007 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14c77128-65d0-4963-b700-a6c279721588/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:00:28,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14c77128-65d0-4963-b700-a6c279721588/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-31 22:00:28,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:28,124 INFO L255 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-10-31 22:00:28,128 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:00:28,143 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-31 22:00:28,157 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-31 22:00:28,251 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-10-31 22:00:28,251 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-10-31 22:00:28,295 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 24 [2024-10-31 22:00:28,485 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-31 22:00:28,485 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-31 22:00:28,510 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-10-31 22:00:28,510 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 36 [2024-10-31 22:00:28,655 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 22:00:28,655 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:00:29,210 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 22:00:29,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211435762] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-31 22:00:29,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-31 22:00:29,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6] total 15 [2024-10-31 22:00:29,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926369469] [2024-10-31 22:00:29,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:00:29,211 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-31 22:00:29,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:29,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-31 22:00:29,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2024-10-31 22:00:29,863 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 60 [2024-10-31 22:00:29,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 166 transitions, 1255 flow. Second operand has 7 states, 7 states have (on average 26.857142857142858) internal successors, (188), 7 states have internal predecessors, (188), 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) [2024-10-31 22:00:29,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:00:29,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 60 [2024-10-31 22:00:29,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:00:31,273 INFO L124 PetriNetUnfolderBase]: 2227/4399 cut-off events. [2024-10-31 22:00:31,273 INFO L125 PetriNetUnfolderBase]: For 2425/2749 co-relation queries the response was YES. [2024-10-31 22:00:31,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10564 conditions, 4399 events. 2227/4399 cut-off events. For 2425/2749 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 27245 event pairs, 1164 based on Foata normal form. 0/3894 useless extension candidates. Maximal degree in co-relation 10428. Up to 2277 conditions per place. [2024-10-31 22:00:31,324 INFO L140 encePairwiseOnDemand]: 51/60 looper letters, 132 selfloop transitions, 54 changer transitions 0/203 dead transitions. [2024-10-31 22:00:31,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 203 transitions, 1767 flow [2024-10-31 22:00:31,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 22:00:31,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-31 22:00:31,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 270 transitions. [2024-10-31 22:00:31,326 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-10-31 22:00:31,326 INFO L175 Difference]: Start difference. First operand has 115 places, 166 transitions, 1255 flow. Second operand 8 states and 270 transitions. [2024-10-31 22:00:31,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 203 transitions, 1767 flow [2024-10-31 22:00:31,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 203 transitions, 1694 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-31 22:00:31,349 INFO L231 Difference]: Finished difference. Result has 121 places, 170 transitions, 1345 flow [2024-10-31 22:00:31,350 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=1182, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1345, PETRI_PLACES=121, PETRI_TRANSITIONS=170} [2024-10-31 22:00:31,351 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 61 predicate places. [2024-10-31 22:00:31,351 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 170 transitions, 1345 flow [2024-10-31 22:00:31,351 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 26.857142857142858) internal successors, (188), 7 states have internal predecessors, (188), 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) [2024-10-31 22:00:31,351 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:00:31,352 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:00:31,374 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14c77128-65d0-4963-b700-a6c279721588/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-31 22:00:31,552 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14c77128-65d0-4963-b700-a6c279721588/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-31 22:00:31,553 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-31 22:00:31,553 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:31,553 INFO L85 PathProgramCache]: Analyzing trace with hash 379331069, now seen corresponding path program 1 times [2024-10-31 22:00:31,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:31,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786073054] [2024-10-31 22:00:31,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:31,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:31,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:31,727 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 22:00:31,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:31,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786073054] [2024-10-31 22:00:31,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786073054] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:00:31,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:00:31,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:00:31,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219323226] [2024-10-31 22:00:31,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:00:31,729 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:00:31,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:31,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:00:31,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:00:31,804 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 60 [2024-10-31 22:00:31,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 170 transitions, 1345 flow. Second operand has 5 states, 5 states have (on average 23.6) internal successors, (118), 5 states have internal predecessors, (118), 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) [2024-10-31 22:00:31,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:00:31,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 60 [2024-10-31 22:00:31,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:00:32,489 INFO L124 PetriNetUnfolderBase]: 1915/3772 cut-off events. [2024-10-31 22:00:32,490 INFO L125 PetriNetUnfolderBase]: For 5014/5569 co-relation queries the response was YES. [2024-10-31 22:00:32,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10600 conditions, 3772 events. 1915/3772 cut-off events. For 5014/5569 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 22338 event pairs, 1347 based on Foata normal form. 264/3733 useless extension candidates. Maximal degree in co-relation 10462. Up to 2782 conditions per place. [2024-10-31 22:00:32,523 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 125 selfloop transitions, 27 changer transitions 0/168 dead transitions. [2024-10-31 22:00:32,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 168 transitions, 1645 flow [2024-10-31 22:00:32,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:00:32,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:00:32,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 139 transitions. [2024-10-31 22:00:32,525 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4633333333333333 [2024-10-31 22:00:32,525 INFO L175 Difference]: Start difference. First operand has 121 places, 170 transitions, 1345 flow. Second operand 5 states and 139 transitions. [2024-10-31 22:00:32,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 168 transitions, 1645 flow [2024-10-31 22:00:32,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 168 transitions, 1609 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:00:32,545 INFO L231 Difference]: Finished difference. Result has 121 places, 168 transitions, 1359 flow [2024-10-31 22:00:32,545 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=1305, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1359, PETRI_PLACES=121, PETRI_TRANSITIONS=168} [2024-10-31 22:00:32,546 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 61 predicate places. [2024-10-31 22:00:32,546 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 168 transitions, 1359 flow [2024-10-31 22:00:32,546 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.6) internal successors, (118), 5 states have internal predecessors, (118), 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) [2024-10-31 22:00:32,546 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:00:32,546 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:00:32,547 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-10-31 22:00:32,547 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-31 22:00:32,547 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:32,547 INFO L85 PathProgramCache]: Analyzing trace with hash -536877759, now seen corresponding path program 1 times [2024-10-31 22:00:32,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:32,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920504009] [2024-10-31 22:00:32,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:32,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:32,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:32,821 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 22:00:32,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:32,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920504009] [2024-10-31 22:00:32,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920504009] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:00:32,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306778364] [2024-10-31 22:00:32,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:32,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:00:32,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14c77128-65d0-4963-b700-a6c279721588/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:00:32,825 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14c77128-65d0-4963-b700-a6c279721588/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:00:32,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14c77128-65d0-4963-b700-a6c279721588/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-31 22:00:32,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:32,935 INFO L255 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-31 22:00:32,937 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:00:32,946 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-31 22:00:33,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-31 22:00:33,003 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-10-31 22:00:33,020 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-31 22:00:33,020 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-31 22:00:33,088 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 22:00:33,088 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:00:33,233 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2024-10-31 22:00:33,333 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 22:00:33,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306778364] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:00:33,334 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:00:33,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-10-31 22:00:33,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013196446] [2024-10-31 22:00:33,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:00:33,334 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-31 22:00:33,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:33,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-31 22:00:33,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-10-31 22:00:34,025 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 60 [2024-10-31 22:00:34,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 168 transitions, 1359 flow. Second operand has 13 states, 13 states have (on average 25.53846153846154) internal successors, (332), 13 states have internal predecessors, (332), 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) [2024-10-31 22:00:34,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:00:34,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 60 [2024-10-31 22:00:34,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:00:35,601 INFO L124 PetriNetUnfolderBase]: 2560/4995 cut-off events. [2024-10-31 22:00:35,602 INFO L125 PetriNetUnfolderBase]: For 5686/6493 co-relation queries the response was YES. [2024-10-31 22:00:35,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13219 conditions, 4995 events. 2560/4995 cut-off events. For 5686/6493 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 31876 event pairs, 1334 based on Foata normal form. 0/4407 useless extension candidates. Maximal degree in co-relation 13081. Up to 2702 conditions per place. [2024-10-31 22:00:35,660 INFO L140 encePairwiseOnDemand]: 49/60 looper letters, 134 selfloop transitions, 54 changer transitions 0/204 dead transitions. [2024-10-31 22:00:35,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 204 transitions, 1899 flow [2024-10-31 22:00:35,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 22:00:35,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-31 22:00:35,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 257 transitions. [2024-10-31 22:00:35,662 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5354166666666667 [2024-10-31 22:00:35,662 INFO L175 Difference]: Start difference. First operand has 121 places, 168 transitions, 1359 flow. Second operand 8 states and 257 transitions. [2024-10-31 22:00:35,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 204 transitions, 1899 flow [2024-10-31 22:00:35,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 204 transitions, 1864 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-31 22:00:35,689 INFO L231 Difference]: Finished difference. Result has 127 places, 172 transitions, 1487 flow [2024-10-31 22:00:35,689 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=1324, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1487, PETRI_PLACES=127, PETRI_TRANSITIONS=172} [2024-10-31 22:00:35,690 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 67 predicate places. [2024-10-31 22:00:35,692 INFO L471 AbstractCegarLoop]: Abstraction has has 127 places, 172 transitions, 1487 flow [2024-10-31 22:00:35,693 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 25.53846153846154) internal successors, (332), 13 states have internal predecessors, (332), 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) [2024-10-31 22:00:35,693 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:00:35,693 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:00:35,713 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14c77128-65d0-4963-b700-a6c279721588/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-31 22:00:35,895 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14c77128-65d0-4963-b700-a6c279721588/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:00:35,895 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-31 22:00:35,896 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:35,896 INFO L85 PathProgramCache]: Analyzing trace with hash -536877760, now seen corresponding path program 1 times [2024-10-31 22:00:35,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:35,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849367597] [2024-10-31 22:00:35,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:35,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:35,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:36,029 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 22:00:36,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:36,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849367597] [2024-10-31 22:00:36,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849367597] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:00:36,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:00:36,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-31 22:00:36,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042588902] [2024-10-31 22:00:36,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:00:36,031 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:00:36,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:36,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:00:36,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:00:36,090 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 60 [2024-10-31 22:00:36,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 172 transitions, 1487 flow. Second operand has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 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) [2024-10-31 22:00:36,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:00:36,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 60 [2024-10-31 22:00:36,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:00:36,708 INFO L124 PetriNetUnfolderBase]: 2146/4194 cut-off events. [2024-10-31 22:00:36,708 INFO L125 PetriNetUnfolderBase]: For 7820/8690 co-relation queries the response was YES. [2024-10-31 22:00:36,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12857 conditions, 4194 events. 2146/4194 cut-off events. For 7820/8690 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 25799 event pairs, 1382 based on Foata normal form. 318/4182 useless extension candidates. Maximal degree in co-relation 12717. Up to 2995 conditions per place. [2024-10-31 22:00:36,754 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 117 selfloop transitions, 38 changer transitions 0/170 dead transitions. [2024-10-31 22:00:36,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 170 transitions, 1793 flow [2024-10-31 22:00:36,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:00:36,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:00:36,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 143 transitions. [2024-10-31 22:00:36,756 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4766666666666667 [2024-10-31 22:00:36,756 INFO L175 Difference]: Start difference. First operand has 127 places, 172 transitions, 1487 flow. Second operand 5 states and 143 transitions. [2024-10-31 22:00:36,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 170 transitions, 1793 flow [2024-10-31 22:00:36,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 170 transitions, 1745 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-31 22:00:36,779 INFO L231 Difference]: Finished difference. Result has 126 places, 170 transitions, 1511 flow [2024-10-31 22:00:36,780 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=1435, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1511, PETRI_PLACES=126, PETRI_TRANSITIONS=170} [2024-10-31 22:00:36,781 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 66 predicate places. [2024-10-31 22:00:36,781 INFO L471 AbstractCegarLoop]: Abstraction has has 126 places, 170 transitions, 1511 flow [2024-10-31 22:00:36,781 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 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) [2024-10-31 22:00:36,781 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:00:36,781 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:00:36,782 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-10-31 22:00:36,782 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-31 22:00:36,782 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:36,782 INFO L85 PathProgramCache]: Analyzing trace with hash -535031870, now seen corresponding path program 1 times [2024-10-31 22:00:36,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:36,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690622949] [2024-10-31 22:00:36,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:36,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:36,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:36,912 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 22:00:36,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:36,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690622949] [2024-10-31 22:00:36,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690622949] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:00:36,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255355331] [2024-10-31 22:00:36,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:36,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:00:36,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14c77128-65d0-4963-b700-a6c279721588/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:00:36,916 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14c77128-65d0-4963-b700-a6c279721588/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:00:36,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14c77128-65d0-4963-b700-a6c279721588/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-31 22:00:37,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:37,021 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-31 22:00:37,023 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:00:37,107 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 22:00:37,107 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:00:37,177 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 22:00:37,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255355331] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:00:37,177 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:00:37,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-10-31 22:00:37,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54935795] [2024-10-31 22:00:37,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:00:37,178 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-31 22:00:37,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:37,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-31 22:00:37,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-10-31 22:00:37,303 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2024-10-31 22:00:37,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 170 transitions, 1511 flow. Second operand has 14 states, 14 states have (on average 28.142857142857142) internal successors, (394), 14 states have internal predecessors, (394), 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) [2024-10-31 22:00:37,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:00:37,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2024-10-31 22:00:37,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:00:38,352 INFO L124 PetriNetUnfolderBase]: 2746/4982 cut-off events. [2024-10-31 22:00:38,352 INFO L125 PetriNetUnfolderBase]: For 8884/9730 co-relation queries the response was YES. [2024-10-31 22:00:38,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15345 conditions, 4982 events. 2746/4982 cut-off events. For 8884/9730 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 28936 event pairs, 1488 based on Foata normal form. 50/4658 useless extension candidates. Maximal degree in co-relation 15205. Up to 2457 conditions per place. [2024-10-31 22:00:38,394 INFO L140 encePairwiseOnDemand]: 46/60 looper letters, 116 selfloop transitions, 105 changer transitions 0/235 dead transitions. [2024-10-31 22:00:38,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 235 transitions, 2255 flow [2024-10-31 22:00:38,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-31 22:00:38,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-31 22:00:38,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 368 transitions. [2024-10-31 22:00:38,396 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6133333333333333 [2024-10-31 22:00:38,396 INFO L175 Difference]: Start difference. First operand has 126 places, 170 transitions, 1511 flow. Second operand 10 states and 368 transitions. [2024-10-31 22:00:38,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 235 transitions, 2255 flow [2024-10-31 22:00:38,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 235 transitions, 2198 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-31 22:00:38,425 INFO L231 Difference]: Finished difference. Result has 135 places, 174 transitions, 1726 flow [2024-10-31 22:00:38,425 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=1454, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1726, PETRI_PLACES=135, PETRI_TRANSITIONS=174} [2024-10-31 22:00:38,426 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 75 predicate places. [2024-10-31 22:00:38,426 INFO L471 AbstractCegarLoop]: Abstraction has has 135 places, 174 transitions, 1726 flow [2024-10-31 22:00:38,426 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 28.142857142857142) internal successors, (394), 14 states have internal predecessors, (394), 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) [2024-10-31 22:00:38,426 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:00:38,427 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 2, 1, 1, 1, 1] [2024-10-31 22:00:38,446 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14c77128-65d0-4963-b700-a6c279721588/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-31 22:00:38,631 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14c77128-65d0-4963-b700-a6c279721588/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:00:38,631 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-31 22:00:38,632 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:38,632 INFO L85 PathProgramCache]: Analyzing trace with hash 262610240, now seen corresponding path program 3 times [2024-10-31 22:00:38,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:38,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7229148] [2024-10-31 22:00:38,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:38,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:38,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat