./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-prod-cons-eq.wvr-oob.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7950d37-f4c1-4965-881c-898cf4163f1a/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7950d37-f4c1-4965-881c-898cf4163f1a/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_e7950d37-f4c1-4965-881c-898cf4163f1a/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7950d37-f4c1-4965-881c-898cf4163f1a/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-prod-cons-eq.wvr-oob.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7950d37-f4c1-4965-881c-898cf4163f1a/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_e7950d37-f4c1-4965-881c-898cf4163f1a/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 5daf9d459a591738ce4ac52eada4b738511fbb9d800cd03182e33bae5ebd943b --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-10-31 22:10:10,874 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 22:10:10,976 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7950d37-f4c1-4965-881c-898cf4163f1a/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-31 22:10:10,986 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 22:10:10,989 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 22:10:11,027 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 22:10:11,030 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 22:10:11,031 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 22:10:11,032 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 22:10:11,033 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 22:10:11,034 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 22:10:11,034 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 22:10:11,035 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 22:10:11,035 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 22:10:11,036 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 22:10:11,036 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 22:10:11,038 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 22:10:11,039 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 22:10:11,039 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 22:10:11,039 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 22:10:11,040 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-31 22:10:11,043 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-31 22:10:11,044 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-31 22:10:11,045 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 22:10:11,046 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-31 22:10:11,046 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 22:10:11,046 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-31 22:10:11,047 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 22:10:11,047 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 22:10:11,047 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 22:10:11,048 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 22:10:11,048 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 22:10:11,048 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 22:10:11,048 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:10:11,049 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 22:10:11,049 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 22:10:11,050 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 22:10:11,050 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 22:10:11,051 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 22:10:11,051 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 22:10:11,052 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 22:10:11,052 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 22:10:11,052 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_e7950d37-f4c1-4965-881c-898cf4163f1a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7950d37-f4c1-4965-881c-898cf4163f1a/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5daf9d459a591738ce4ac52eada4b738511fbb9d800cd03182e33bae5ebd943b [2024-10-31 22:10:11,370 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 22:10:11,409 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 22:10:11,413 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 22:10:11,414 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 22:10:11,415 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 22:10:11,416 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7950d37-f4c1-4965-881c-898cf4163f1a/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/weaver/popl20-prod-cons-eq.wvr-oob.c Unable to find full path for "g++" [2024-10-31 22:10:13,506 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 22:10:13,765 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 22:10:13,766 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7950d37-f4c1-4965-881c-898cf4163f1a/sv-benchmarks/c/weaver/popl20-prod-cons-eq.wvr-oob.c [2024-10-31 22:10:13,781 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7950d37-f4c1-4965-881c-898cf4163f1a/bin/uautomizer-verify-4GaUIPS5ZU/data/58e0a0832/d0ab604fad714a22883d860b26a0d78e/FLAGea4923141 [2024-10-31 22:10:13,800 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7950d37-f4c1-4965-881c-898cf4163f1a/bin/uautomizer-verify-4GaUIPS5ZU/data/58e0a0832/d0ab604fad714a22883d860b26a0d78e [2024-10-31 22:10:13,806 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 22:10:13,809 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 22:10:13,811 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 22:10:13,811 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 22:10:13,818 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 22:10:13,819 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:10:13" (1/1) ... [2024-10-31 22:10:13,820 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12e57dcb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:10:13, skipping insertion in model container [2024-10-31 22:10:13,820 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:10:13" (1/1) ... [2024-10-31 22:10:13,851 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 22:10:14,128 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 22:10:14,139 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 22:10:14,146 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 22:10:14,149 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:10:14,164 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 22:10:14,211 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:10:14,241 INFO L204 MainTranslator]: Completed translation [2024-10-31 22:10:14,242 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:10:14 WrapperNode [2024-10-31 22:10:14,242 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 22:10:14,243 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 22:10:14,243 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 22:10:14,244 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 22:10:14,253 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:10:14" (1/1) ... [2024-10-31 22:10:14,274 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:10:14" (1/1) ... [2024-10-31 22:10:14,342 INFO L138 Inliner]: procedures = 27, calls = 66, calls flagged for inlining = 27, calls inlined = 33, statements flattened = 399 [2024-10-31 22:10:14,342 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 22:10:14,343 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 22:10:14,344 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 22:10:14,344 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 22:10:14,361 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:10:14" (1/1) ... [2024-10-31 22:10:14,362 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:10:14" (1/1) ... [2024-10-31 22:10:14,374 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:10:14" (1/1) ... [2024-10-31 22:10:14,424 INFO L175 MemorySlicer]: Split 24 memory accesses to 4 slices as follows [2, 16, 3, 3]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 6 writes are split as follows [0, 4, 1, 1]. [2024-10-31 22:10:14,424 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:10:14" (1/1) ... [2024-10-31 22:10:14,424 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:10:14" (1/1) ... [2024-10-31 22:10:14,450 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:10:14" (1/1) ... [2024-10-31 22:10:14,457 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:10:14" (1/1) ... [2024-10-31 22:10:14,461 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:10:14" (1/1) ... [2024-10-31 22:10:14,468 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:10:14" (1/1) ... [2024-10-31 22:10:14,478 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 22:10:14,479 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 22:10:14,479 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 22:10:14,479 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 22:10:14,481 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:10:14" (1/1) ... [2024-10-31 22:10:14,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:10:14,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7950d37-f4c1-4965-881c-898cf4163f1a/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:10:14,519 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7950d37-f4c1-4965-881c-898cf4163f1a/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 22:10:14,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7950d37-f4c1-4965-881c-898cf4163f1a/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 22:10:14,555 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 22:10:14,556 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-10-31 22:10:14,556 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-10-31 22:10:14,556 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-10-31 22:10:14,556 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2024-10-31 22:10:14,556 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-31 22:10:14,557 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-31 22:10:14,557 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-31 22:10:14,557 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-10-31 22:10:14,557 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-31 22:10:14,557 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-31 22:10:14,558 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-31 22:10:14,558 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-10-31 22:10:14,558 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-10-31 22:10:14,558 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-10-31 22:10:14,558 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-10-31 22:10:14,559 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2024-10-31 22:10:14,559 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-31 22:10:14,559 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-31 22:10:14,559 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-31 22:10:14,560 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-31 22:10:14,560 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-10-31 22:10:14,560 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-10-31 22:10:14,560 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-31 22:10:14,560 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-31 22:10:14,560 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-31 22:10:14,561 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-10-31 22:10:14,561 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-31 22:10:14,561 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-31 22:10:14,561 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-31 22:10:14,562 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 22:10:14,562 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 22:10:14,564 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 22:10:14,741 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 22:10:14,743 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 22:10:15,768 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-31 22:10:15,768 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 22:10:16,427 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 22:10:16,427 INFO L316 CfgBuilder]: Removed 9 assume(true) statements. [2024-10-31 22:10:16,428 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:10:16 BoogieIcfgContainer [2024-10-31 22:10:16,428 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 22:10:16,430 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 22:10:16,431 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 22:10:16,434 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 22:10:16,434 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 10:10:13" (1/3) ... [2024-10-31 22:10:16,435 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b9068cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:10:16, skipping insertion in model container [2024-10-31 22:10:16,435 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:10:14" (2/3) ... [2024-10-31 22:10:16,436 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b9068cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:10:16, skipping insertion in model container [2024-10-31 22:10:16,436 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:10:16" (3/3) ... [2024-10-31 22:10:16,437 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-prod-cons-eq.wvr-oob.c [2024-10-31 22:10:16,458 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 22:10:16,459 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 46 error locations. [2024-10-31 22:10:16,459 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-31 22:10:16,591 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-10-31 22:10:16,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 106 places, 106 transitions, 233 flow [2024-10-31 22:10:16,719 INFO L124 PetriNetUnfolderBase]: 10/103 cut-off events. [2024-10-31 22:10:16,720 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-10-31 22:10:16,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116 conditions, 103 events. 10/103 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 309 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 70. Up to 2 conditions per place. [2024-10-31 22:10:16,729 INFO L82 GeneralOperation]: Start removeDead. Operand has 106 places, 106 transitions, 233 flow [2024-10-31 22:10:16,737 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 102 places, 102 transitions, 222 flow [2024-10-31 22:10:16,754 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 22:10:16,768 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;@66b75822, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 22:10:16,769 INFO L334 AbstractCegarLoop]: Starting to check reachability of 81 error locations. [2024-10-31 22:10:16,775 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-31 22:10:16,775 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-10-31 22:10:16,775 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-31 22:10:16,776 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:10:16,776 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-31 22:10:16,777 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-10-31 22:10:16,783 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:10:16,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1291537, now seen corresponding path program 1 times [2024-10-31 22:10:16,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:10:16,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890981373] [2024-10-31 22:10:16,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:10:16,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:10:16,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:10:17,250 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 22:10:17,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:10:17,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890981373] [2024-10-31 22:10:17,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890981373] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:10:17,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:10:17,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-31 22:10:17,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356944866] [2024-10-31 22:10:17,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:10:17,265 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:10:17,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:10:17,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:10:17,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:10:17,391 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 106 [2024-10-31 22:10:17,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 102 transitions, 222 flow. Second operand has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 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 22:10:17,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:10:17,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 106 [2024-10-31 22:10:17,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:10:19,947 INFO L124 PetriNetUnfolderBase]: 5748/11621 cut-off events. [2024-10-31 22:10:19,947 INFO L125 PetriNetUnfolderBase]: For 228/228 co-relation queries the response was YES. [2024-10-31 22:10:19,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19700 conditions, 11621 events. 5748/11621 cut-off events. For 228/228 co-relation queries the response was YES. Maximal size of possible extension queue 888. Compared 115081 event pairs, 4141 based on Foata normal form. 1/6125 useless extension candidates. Maximal degree in co-relation 19012. Up to 7739 conditions per place. [2024-10-31 22:10:20,075 INFO L140 encePairwiseOnDemand]: 93/106 looper letters, 52 selfloop transitions, 4 changer transitions 0/92 dead transitions. [2024-10-31 22:10:20,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 92 transitions, 314 flow [2024-10-31 22:10:20,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:10:20,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:10:20,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 185 transitions. [2024-10-31 22:10:20,093 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5817610062893082 [2024-10-31 22:10:20,096 INFO L175 Difference]: Start difference. First operand has 102 places, 102 transitions, 222 flow. Second operand 3 states and 185 transitions. [2024-10-31 22:10:20,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 92 transitions, 314 flow [2024-10-31 22:10:20,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 92 transitions, 302 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-10-31 22:10:20,115 INFO L231 Difference]: Finished difference. Result has 88 places, 92 transitions, 198 flow [2024-10-31 22:10:20,118 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=198, PETRI_PLACES=88, PETRI_TRANSITIONS=92} [2024-10-31 22:10:20,123 INFO L277 CegarLoopForPetriNet]: 102 programPoint places, -14 predicate places. [2024-10-31 22:10:20,124 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 92 transitions, 198 flow [2024-10-31 22:10:20,125 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 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 22:10:20,125 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:10:20,125 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-31 22:10:20,126 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 22:10:20,127 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-10-31 22:10:20,128 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:10:20,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1291538, now seen corresponding path program 1 times [2024-10-31 22:10:20,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:10:20,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163631080] [2024-10-31 22:10:20,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:10:20,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:10:20,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:10:20,688 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 22:10:20,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:10:20,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163631080] [2024-10-31 22:10:20,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163631080] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:10:20,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:10:20,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:10:20,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704477049] [2024-10-31 22:10:20,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:10:20,693 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:10:20,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:10:20,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:10:20,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:10:20,818 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 106 [2024-10-31 22:10:20,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 92 transitions, 198 flow. Second operand has 4 states, 4 states have (on average 40.75) internal successors, (163), 4 states have internal predecessors, (163), 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 22:10:20,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:10:20,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 106 [2024-10-31 22:10:20,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:10:22,999 INFO L124 PetriNetUnfolderBase]: 5749/11624 cut-off events. [2024-10-31 22:10:22,999 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2024-10-31 22:10:23,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19509 conditions, 11624 events. 5749/11624 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 888. Compared 115027 event pairs, 4141 based on Foata normal form. 0/6125 useless extension candidates. Maximal degree in co-relation 19456. Up to 7756 conditions per place. [2024-10-31 22:10:23,096 INFO L140 encePairwiseOnDemand]: 101/106 looper letters, 59 selfloop transitions, 4 changer transitions 0/95 dead transitions. [2024-10-31 22:10:23,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 95 transitions, 330 flow [2024-10-31 22:10:23,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:10:23,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:10:23,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 224 transitions. [2024-10-31 22:10:23,099 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5283018867924528 [2024-10-31 22:10:23,100 INFO L175 Difference]: Start difference. First operand has 88 places, 92 transitions, 198 flow. Second operand 4 states and 224 transitions. [2024-10-31 22:10:23,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 95 transitions, 330 flow [2024-10-31 22:10:23,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 95 transitions, 322 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:10:23,104 INFO L231 Difference]: Finished difference. Result has 91 places, 95 transitions, 217 flow [2024-10-31 22:10:23,105 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=217, PETRI_PLACES=91, PETRI_TRANSITIONS=95} [2024-10-31 22:10:23,105 INFO L277 CegarLoopForPetriNet]: 102 programPoint places, -11 predicate places. [2024-10-31 22:10:23,106 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 95 transitions, 217 flow [2024-10-31 22:10:23,106 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.75) internal successors, (163), 4 states have internal predecessors, (163), 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 22:10:23,106 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:10:23,107 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-10-31 22:10:23,107 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-31 22:10:23,107 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-10-31 22:10:23,108 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:10:23,108 INFO L85 PathProgramCache]: Analyzing trace with hash 40039105, now seen corresponding path program 1 times [2024-10-31 22:10:23,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:10:23,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030497162] [2024-10-31 22:10:23,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:10:23,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:10:23,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:10:23,346 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 22:10:23,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:10:23,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030497162] [2024-10-31 22:10:23,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030497162] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:10:23,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:10:23,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:10:23,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111155355] [2024-10-31 22:10:23,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:10:23,350 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:10:23,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:10:23,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:10:23,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:10:23,517 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 106 [2024-10-31 22:10:23,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 95 transitions, 217 flow. Second operand has 5 states, 5 states have (on average 40.8) internal successors, (204), 5 states have internal predecessors, (204), 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 22:10:23,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:10:23,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 106 [2024-10-31 22:10:23,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:10:25,359 INFO L124 PetriNetUnfolderBase]: 5750/11627 cut-off events. [2024-10-31 22:10:25,360 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2024-10-31 22:10:25,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19524 conditions, 11627 events. 5750/11627 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 887. Compared 114932 event pairs, 4141 based on Foata normal form. 0/6125 useless extension candidates. Maximal degree in co-relation 19499. Up to 7755 conditions per place. [2024-10-31 22:10:25,441 INFO L140 encePairwiseOnDemand]: 98/106 looper letters, 59 selfloop transitions, 7 changer transitions 0/98 dead transitions. [2024-10-31 22:10:25,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 98 transitions, 355 flow [2024-10-31 22:10:25,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:10:25,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:10:25,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 267 transitions. [2024-10-31 22:10:25,444 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5037735849056604 [2024-10-31 22:10:25,445 INFO L175 Difference]: Start difference. First operand has 91 places, 95 transitions, 217 flow. Second operand 5 states and 267 transitions. [2024-10-31 22:10:25,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 98 transitions, 355 flow [2024-10-31 22:10:25,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 98 transitions, 352 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-31 22:10:25,448 INFO L231 Difference]: Finished difference. Result has 96 places, 98 transitions, 251 flow [2024-10-31 22:10:25,448 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=251, PETRI_PLACES=96, PETRI_TRANSITIONS=98} [2024-10-31 22:10:25,449 INFO L277 CegarLoopForPetriNet]: 102 programPoint places, -6 predicate places. [2024-10-31 22:10:25,449 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 98 transitions, 251 flow [2024-10-31 22:10:25,450 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 40.8) internal successors, (204), 5 states have internal predecessors, (204), 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 22:10:25,450 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:10:25,450 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-10-31 22:10:25,450 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-31 22:10:25,451 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-10-31 22:10:25,451 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:10:25,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1241212178, now seen corresponding path program 1 times [2024-10-31 22:10:25,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:10:25,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484164501] [2024-10-31 22:10:25,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:10:25,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:10:25,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:10:25,818 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:10:25,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:10:25,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484164501] [2024-10-31 22:10:25,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484164501] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:10:25,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654885842] [2024-10-31 22:10:25,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:10:25,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:10:25,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7950d37-f4c1-4965-881c-898cf4163f1a/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:10:25,825 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7950d37-f4c1-4965-881c-898cf4163f1a/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:10:25,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7950d37-f4c1-4965-881c-898cf4163f1a/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-31 22:10:25,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:10:25,969 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-31 22:10:25,975 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:10:26,059 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 10 treesize of output 9 [2024-10-31 22:10:26,424 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:10:26,424 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:10:26,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:10:26,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654885842] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:10:26,663 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:10:26,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-10-31 22:10:26,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286591817] [2024-10-31 22:10:26,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:10:26,668 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-31 22:10:26,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:10:26,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-31 22:10:26,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-10-31 22:10:27,409 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 106 [2024-10-31 22:10:27,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 98 transitions, 251 flow. Second operand has 11 states, 11 states have (on average 41.36363636363637) internal successors, (455), 11 states have internal predecessors, (455), 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 22:10:27,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:10:27,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 106 [2024-10-31 22:10:27,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:10:30,290 INFO L124 PetriNetUnfolderBase]: 5750/11626 cut-off events. [2024-10-31 22:10:30,290 INFO L125 PetriNetUnfolderBase]: For 51/51 co-relation queries the response was YES. [2024-10-31 22:10:30,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19537 conditions, 11626 events. 5750/11626 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 887. Compared 115057 event pairs, 4141 based on Foata normal form. 0/6127 useless extension candidates. Maximal degree in co-relation 19509. Up to 7755 conditions per place. [2024-10-31 22:10:30,374 INFO L140 encePairwiseOnDemand]: 101/106 looper letters, 58 selfloop transitions, 7 changer transitions 0/97 dead transitions. [2024-10-31 22:10:30,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 97 transitions, 377 flow [2024-10-31 22:10:30,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 22:10:30,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-31 22:10:30,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 303 transitions. [2024-10-31 22:10:30,377 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47641509433962265 [2024-10-31 22:10:30,377 INFO L175 Difference]: Start difference. First operand has 96 places, 98 transitions, 251 flow. Second operand 6 states and 303 transitions. [2024-10-31 22:10:30,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 97 transitions, 377 flow [2024-10-31 22:10:30,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 97 transitions, 376 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-31 22:10:30,383 INFO L231 Difference]: Finished difference. Result has 99 places, 97 transitions, 260 flow [2024-10-31 22:10:30,383 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=260, PETRI_PLACES=99, PETRI_TRANSITIONS=97} [2024-10-31 22:10:30,384 INFO L277 CegarLoopForPetriNet]: 102 programPoint places, -3 predicate places. [2024-10-31 22:10:30,385 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 97 transitions, 260 flow [2024-10-31 22:10:30,385 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 41.36363636363637) internal successors, (455), 11 states have internal predecessors, (455), 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 22:10:30,386 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:10:30,386 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-10-31 22:10:30,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7950d37-f4c1-4965-881c-898cf4163f1a/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-31 22:10:30,589 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7950d37-f4c1-4965-881c-898cf4163f1a/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:10:30,591 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-10-31 22:10:30,591 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:10:30,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1241214871, now seen corresponding path program 1 times [2024-10-31 22:10:30,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:10:30,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429326161] [2024-10-31 22:10:30,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:10:30,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:10:30,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:10:30,819 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 22:10:30,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:10:30,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429326161] [2024-10-31 22:10:30,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429326161] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:10:30,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:10:30,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:10:30,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223659215] [2024-10-31 22:10:30,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:10:30,822 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:10:30,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:10:30,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:10:30,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:10:30,974 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 106 [2024-10-31 22:10:30,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 97 transitions, 260 flow. Second operand has 5 states, 5 states have (on average 41.0) internal successors, (205), 5 states have internal predecessors, (205), 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 22:10:30,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:10:30,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 106 [2024-10-31 22:10:30,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:10:32,894 INFO L124 PetriNetUnfolderBase]: 5751/11629 cut-off events. [2024-10-31 22:10:32,894 INFO L125 PetriNetUnfolderBase]: For 51/51 co-relation queries the response was YES. [2024-10-31 22:10:32,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19550 conditions, 11629 events. 5751/11629 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 887. Compared 114976 event pairs, 4141 based on Foata normal form. 0/6129 useless extension candidates. Maximal degree in co-relation 19517. Up to 7757 conditions per place. [2024-10-31 22:10:33,026 INFO L140 encePairwiseOnDemand]: 97/106 looper letters, 59 selfloop transitions, 9 changer transitions 0/100 dead transitions. [2024-10-31 22:10:33,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 100 transitions, 402 flow [2024-10-31 22:10:33,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:10:33,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:10:33,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 266 transitions. [2024-10-31 22:10:33,029 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5018867924528302 [2024-10-31 22:10:33,029 INFO L175 Difference]: Start difference. First operand has 99 places, 97 transitions, 260 flow. Second operand 5 states and 266 transitions. [2024-10-31 22:10:33,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 100 transitions, 402 flow [2024-10-31 22:10:33,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 100 transitions, 368 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-10-31 22:10:33,034 INFO L231 Difference]: Finished difference. Result has 97 places, 100 transitions, 269 flow [2024-10-31 22:10:33,035 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=269, PETRI_PLACES=97, PETRI_TRANSITIONS=100} [2024-10-31 22:10:33,036 INFO L277 CegarLoopForPetriNet]: 102 programPoint places, -5 predicate places. [2024-10-31 22:10:33,036 INFO L471 AbstractCegarLoop]: Abstraction has has 97 places, 100 transitions, 269 flow [2024-10-31 22:10:33,036 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 41.0) internal successors, (205), 5 states have internal predecessors, (205), 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 22:10:33,037 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:10:33,037 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-10-31 22:10:33,037 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-31 22:10:33,037 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-10-31 22:10:33,038 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:10:33,038 INFO L85 PathProgramCache]: Analyzing trace with hash -177083474, now seen corresponding path program 1 times [2024-10-31 22:10:33,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:10:33,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12078976] [2024-10-31 22:10:33,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:10:33,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:10:33,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:10:33,420 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:10:33,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:10:33,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12078976] [2024-10-31 22:10:33,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12078976] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:10:33,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312948212] [2024-10-31 22:10:33,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:10:33,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:10:33,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7950d37-f4c1-4965-881c-898cf4163f1a/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:10:33,424 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7950d37-f4c1-4965-881c-898cf4163f1a/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:10:33,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7950d37-f4c1-4965-881c-898cf4163f1a/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-31 22:10:33,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:10:33,557 INFO L255 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-31 22:10:33,559 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:10:33,586 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 10 treesize of output 9 [2024-10-31 22:10:33,845 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:10:33,846 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:10:34,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:10:34,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312948212] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:10:34,130 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:10:34,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-10-31 22:10:34,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211283417] [2024-10-31 22:10:34,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:10:34,131 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-31 22:10:34,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:10:34,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-31 22:10:34,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-10-31 22:10:34,893 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 106 [2024-10-31 22:10:34,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 100 transitions, 269 flow. Second operand has 13 states, 13 states have (on average 41.30769230769231) internal successors, (537), 13 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:10:34,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:10:34,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 106 [2024-10-31 22:10:34,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:10:36,500 INFO L124 PetriNetUnfolderBase]: 5751/11628 cut-off events. [2024-10-31 22:10:36,500 INFO L125 PetriNetUnfolderBase]: For 53/53 co-relation queries the response was YES. [2024-10-31 22:10:36,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19548 conditions, 11628 events. 5751/11628 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 887. Compared 115173 event pairs, 4141 based on Foata normal form. 0/6131 useless extension candidates. Maximal degree in co-relation 19506. Up to 7750 conditions per place. [2024-10-31 22:10:36,602 INFO L140 encePairwiseOnDemand]: 98/106 looper letters, 55 selfloop transitions, 12 changer transitions 0/99 dead transitions. [2024-10-31 22:10:36,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 99 transitions, 399 flow [2024-10-31 22:10:36,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 22:10:36,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-31 22:10:36,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 345 transitions. [2024-10-31 22:10:36,605 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46495956873315364 [2024-10-31 22:10:36,605 INFO L175 Difference]: Start difference. First operand has 97 places, 100 transitions, 269 flow. Second operand 7 states and 345 transitions. [2024-10-31 22:10:36,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 99 transitions, 399 flow [2024-10-31 22:10:36,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 99 transitions, 392 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:10:36,609 INFO L231 Difference]: Finished difference. Result has 100 places, 99 transitions, 282 flow [2024-10-31 22:10:36,609 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=282, PETRI_PLACES=100, PETRI_TRANSITIONS=99} [2024-10-31 22:10:36,610 INFO L277 CegarLoopForPetriNet]: 102 programPoint places, -2 predicate places. [2024-10-31 22:10:36,611 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 99 transitions, 282 flow [2024-10-31 22:10:36,611 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 41.30769230769231) internal successors, (537), 13 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:10:36,612 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:10:36,612 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-31 22:10:36,636 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7950d37-f4c1-4965-881c-898cf4163f1a/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-31 22:10:36,812 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7950d37-f4c1-4965-881c-898cf4163f1a/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-10-31 22:10:36,813 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-10-31 22:10:36,813 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:10:36,813 INFO L85 PathProgramCache]: Analyzing trace with hash -177042885, now seen corresponding path program 1 times [2024-10-31 22:10:36,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:10:36,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495453475] [2024-10-31 22:10:36,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:10:36,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:10:36,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:10:36,935 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 22:10:36,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:10:36,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495453475] [2024-10-31 22:10:36,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495453475] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:10:36,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:10:36,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-31 22:10:36,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956687393] [2024-10-31 22:10:36,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:10:36,937 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:10:36,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:10:36,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:10:36,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:10:36,970 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 106 [2024-10-31 22:10:36,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 99 transitions, 282 flow. Second operand has 5 states, 5 states have (on average 45.0) internal successors, (225), 5 states have internal predecessors, (225), 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 22:10:36,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:10:36,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 106 [2024-10-31 22:10:36,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:10:38,806 INFO L124 PetriNetUnfolderBase]: 7474/15889 cut-off events. [2024-10-31 22:10:38,806 INFO L125 PetriNetUnfolderBase]: For 73/73 co-relation queries the response was YES. [2024-10-31 22:10:38,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26445 conditions, 15889 events. 7474/15889 cut-off events. For 73/73 co-relation queries the response was YES. Maximal size of possible extension queue 1210. Compared 170656 event pairs, 5726 based on Foata normal form. 236/8584 useless extension candidates. Maximal degree in co-relation 26380. Up to 7712 conditions per place. [2024-10-31 22:10:38,922 INFO L140 encePairwiseOnDemand]: 94/106 looper letters, 99 selfloop transitions, 11 changer transitions 0/144 dead transitions. [2024-10-31 22:10:38,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 144 transitions, 612 flow [2024-10-31 22:10:38,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 22:10:38,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-31 22:10:38,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 371 transitions. [2024-10-31 22:10:38,927 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-10-31 22:10:38,927 INFO L175 Difference]: Start difference. First operand has 100 places, 99 transitions, 282 flow. Second operand 6 states and 371 transitions. [2024-10-31 22:10:38,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 144 transitions, 612 flow [2024-10-31 22:10:38,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 144 transitions, 587 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-10-31 22:10:38,935 INFO L231 Difference]: Finished difference. Result has 103 places, 106 transitions, 334 flow [2024-10-31 22:10:38,938 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=257, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=334, PETRI_PLACES=103, PETRI_TRANSITIONS=106} [2024-10-31 22:10:38,939 INFO L277 CegarLoopForPetriNet]: 102 programPoint places, 1 predicate places. [2024-10-31 22:10:38,939 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 106 transitions, 334 flow [2024-10-31 22:10:38,940 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 45.0) internal successors, (225), 5 states have internal predecessors, (225), 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 22:10:38,940 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:10:38,940 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-10-31 22:10:38,940 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-31 22:10:38,940 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-10-31 22:10:38,941 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:10:38,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1193373287, now seen corresponding path program 1 times [2024-10-31 22:10:38,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:10:38,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944418452] [2024-10-31 22:10:38,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:10:38,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:10:38,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:10:39,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:10:39,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:10:39,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944418452] [2024-10-31 22:10:39,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944418452] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:10:39,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432231734] [2024-10-31 22:10:39,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:10:39,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:10:39,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7950d37-f4c1-4965-881c-898cf4163f1a/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:10:39,252 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7950d37-f4c1-4965-881c-898cf4163f1a/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:10:39,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7950d37-f4c1-4965-881c-898cf4163f1a/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-31 22:10:39,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:10:39,392 INFO L255 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-31 22:10:39,394 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:10:39,422 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 10 treesize of output 9 [2024-10-31 22:10:39,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:10:39,641 INFO L311 TraceCheckSpWp]: Computing backward predicates...