./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/verifythis/prefixsum_rec.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/verifythis/prefixsum_rec.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB --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 81bdf17d0130e934dcb31a2f76f595e947b99d6273334b7f05365a624466aeab --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 02:44:36,496 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 02:44:36,584 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-28 02:44:36,594 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 02:44:36,594 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 02:44:36,629 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 02:44:36,629 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 02:44:36,631 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 02:44:36,631 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 02:44:36,632 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 02:44:36,633 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 02:44:36,633 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 02:44:36,633 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 02:44:36,633 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 02:44:36,633 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 02:44:36,633 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 02:44:36,634 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 02:44:36,634 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 02:44:36,634 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 02:44:36,634 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 02:44:36,635 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-28 02:44:36,635 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-28 02:44:36,635 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-28 02:44:36,635 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 02:44:36,635 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-28 02:44:36,635 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-28 02:44:36,635 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 02:44:36,635 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 02:44:36,635 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 02:44:36,636 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 02:44:36,636 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 02:44:36,636 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 02:44:36,636 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 02:44:36,637 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 02:44:36,637 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 02:44:36,637 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 02:44:36,637 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 02:44:36,637 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 02:44:36,637 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 02:44:36,637 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 02:44:36,638 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 02:44:36,638 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 02:44:36,638 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 02:44:36,638 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 02:44:36,638 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 02:44:36,638 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 02:44:36,638 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 02:44:36,638 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB 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 -> 81bdf17d0130e934dcb31a2f76f595e947b99d6273334b7f05365a624466aeab [2024-11-28 02:44:36,930 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 02:44:36,938 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 02:44:36,940 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 02:44:36,942 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 02:44:36,942 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 02:44:36,943 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/verifythis/prefixsum_rec.c [2024-11-28 02:44:39,933 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/data/221025415/26bbe3fb10f64867a9a6dfcff461c195/FLAG055fd913e [2024-11-28 02:44:40,303 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 02:44:40,304 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/sv-benchmarks/c/verifythis/prefixsum_rec.c [2024-11-28 02:44:40,314 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/data/221025415/26bbe3fb10f64867a9a6dfcff461c195/FLAG055fd913e [2024-11-28 02:44:40,342 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/data/221025415/26bbe3fb10f64867a9a6dfcff461c195 [2024-11-28 02:44:40,346 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 02:44:40,348 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 02:44:40,349 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 02:44:40,349 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 02:44:40,355 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 02:44:40,356 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:44:40" (1/1) ... [2024-11-28 02:44:40,357 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48e47fba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:44:40, skipping insertion in model container [2024-11-28 02:44:40,358 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:44:40" (1/1) ... [2024-11-28 02:44:40,384 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 02:44:40,622 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 02:44:40,639 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 02:44:40,681 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 02:44:40,710 INFO L204 MainTranslator]: Completed translation [2024-11-28 02:44:40,712 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:44:40 WrapperNode [2024-11-28 02:44:40,712 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 02:44:40,714 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 02:44:40,714 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 02:44:40,714 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 02:44:40,727 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:44:40" (1/1) ... [2024-11-28 02:44:40,736 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:44:40" (1/1) ... [2024-11-28 02:44:40,764 INFO L138 Inliner]: procedures = 22, calls = 38, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 80 [2024-11-28 02:44:40,764 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 02:44:40,765 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 02:44:40,765 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 02:44:40,765 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 02:44:40,777 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:44:40" (1/1) ... [2024-11-28 02:44:40,777 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:44:40" (1/1) ... [2024-11-28 02:44:40,780 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:44:40" (1/1) ... [2024-11-28 02:44:40,798 INFO L175 MemorySlicer]: Split 16 memory accesses to 2 slices as follows [2, 14]. 88 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 6 writes are split as follows [0, 6]. [2024-11-28 02:44:40,798 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:44:40" (1/1) ... [2024-11-28 02:44:40,799 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:44:40" (1/1) ... [2024-11-28 02:44:40,809 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:44:40" (1/1) ... [2024-11-28 02:44:40,810 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:44:40" (1/1) ... [2024-11-28 02:44:40,815 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:44:40" (1/1) ... [2024-11-28 02:44:40,821 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:44:40" (1/1) ... [2024-11-28 02:44:40,822 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:44:40" (1/1) ... [2024-11-28 02:44:40,829 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 02:44:40,830 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 02:44:40,833 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 02:44:40,834 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 02:44:40,835 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:44:40" (1/1) ... [2024-11-28 02:44:40,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 02:44:40,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:44:40,871 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 02:44:40,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 02:44:40,908 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 02:44:40,908 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-28 02:44:40,909 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-28 02:44:40,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-28 02:44:40,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-28 02:44:40,909 INFO L130 BoogieDeclarations]: Found specification of procedure downsweep [2024-11-28 02:44:40,909 INFO L138 BoogieDeclarations]: Found implementation of procedure downsweep [2024-11-28 02:44:40,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-28 02:44:40,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-28 02:44:40,910 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-28 02:44:40,910 INFO L130 BoogieDeclarations]: Found specification of procedure upsweep [2024-11-28 02:44:40,910 INFO L138 BoogieDeclarations]: Found implementation of procedure upsweep [2024-11-28 02:44:40,910 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 02:44:40,910 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 02:44:40,910 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-28 02:44:40,910 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-28 02:44:40,911 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2024-11-28 02:44:40,911 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2024-11-28 02:44:40,911 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-28 02:44:41,002 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 02:44:41,004 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 02:44:41,497 INFO L? ?]: Removed 103 outVars from TransFormulas that were not future-live. [2024-11-28 02:44:41,497 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 02:44:41,512 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 02:44:41,512 INFO L312 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-28 02:44:41,513 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:44:41 BoogieIcfgContainer [2024-11-28 02:44:41,513 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 02:44:41,516 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 02:44:41,516 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 02:44:41,522 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 02:44:41,522 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 02:44:40" (1/3) ... [2024-11-28 02:44:41,523 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13d497cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:44:41, skipping insertion in model container [2024-11-28 02:44:41,523 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:44:40" (2/3) ... [2024-11-28 02:44:41,523 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13d497cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:44:41, skipping insertion in model container [2024-11-28 02:44:41,523 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:44:41" (3/3) ... [2024-11-28 02:44:41,525 INFO L128 eAbstractionObserver]: Analyzing ICFG prefixsum_rec.c [2024-11-28 02:44:41,544 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 02:44:41,546 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG prefixsum_rec.c that has 5 procedures, 107 locations, 1 initial locations, 3 loop locations, and 34 error locations. [2024-11-28 02:44:41,610 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 02:44:41,629 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;@63f5b63d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 02:44:41,629 INFO L334 AbstractCegarLoop]: Starting to check reachability of 34 error locations. [2024-11-28 02:44:41,634 INFO L276 IsEmpty]: Start isEmpty. Operand has 107 states, 58 states have (on average 1.7586206896551724) internal successors, (102), 92 states have internal predecessors, (102), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-28 02:44:41,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-28 02:44:41,644 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:44:41,644 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:44:41,645 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-28 02:44:41,650 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:44:41,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1680049465, now seen corresponding path program 1 times [2024-11-28 02:44:41,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:44:41,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909824783] [2024-11-28 02:44:41,657 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:44:41,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:44:41,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:44:41,854 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-28 02:44:41,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:44:41,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909824783] [2024-11-28 02:44:41,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909824783] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:44:41,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265576724] [2024-11-28 02:44:41,856 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:44:41,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:44:41,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:44:41,861 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:44:41,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 02:44:41,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:44:41,968 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-11-28 02:44:41,974 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:44:41,992 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-28 02:44:41,992 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 02:44:41,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265576724] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:44:41,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 02:44:41,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2024-11-28 02:44:41,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466675301] [2024-11-28 02:44:42,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:44:42,005 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-28 02:44:42,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:44:42,030 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-28 02:44:42,031 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-28 02:44:42,034 INFO L87 Difference]: Start difference. First operand has 107 states, 58 states have (on average 1.7586206896551724) internal successors, (102), 92 states have internal predecessors, (102), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 02:44:42,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:44:42,067 INFO L93 Difference]: Finished difference Result 106 states and 116 transitions. [2024-11-28 02:44:42,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-28 02:44:42,072 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2024-11-28 02:44:42,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:44:42,082 INFO L225 Difference]: With dead ends: 106 [2024-11-28 02:44:42,083 INFO L226 Difference]: Without dead ends: 104 [2024-11-28 02:44:42,086 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-28 02:44:42,092 INFO L435 NwaCegarLoop]: 116 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 02:44:42,093 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 02:44:42,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2024-11-28 02:44:42,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2024-11-28 02:44:42,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 56 states have (on average 1.6785714285714286) internal successors, (94), 89 states have internal predecessors, (94), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-28 02:44:42,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 114 transitions. [2024-11-28 02:44:42,144 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 114 transitions. Word has length 29 [2024-11-28 02:44:42,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:44:42,144 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 114 transitions. [2024-11-28 02:44:42,145 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 02:44:42,145 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 114 transitions. [2024-11-28 02:44:42,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-28 02:44:42,146 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:44:42,147 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:44:42,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-28 02:44:42,351 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2024-11-28 02:44:42,352 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-28 02:44:42,352 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:44:42,352 INFO L85 PathProgramCache]: Analyzing trace with hash 799529721, now seen corresponding path program 1 times [2024-11-28 02:44:42,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:44:42,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258586342] [2024-11-28 02:44:42,353 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:44:42,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:44:42,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:44:42,828 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-28 02:44:42,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:44:42,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258586342] [2024-11-28 02:44:42,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258586342] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:44:42,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:44:42,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 02:44:42,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249207559] [2024-11-28 02:44:42,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:44:42,829 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 02:44:42,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:44:42,830 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 02:44:42,830 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 02:44:42,831 INFO L87 Difference]: Start difference. First operand 104 states and 114 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-28 02:44:43,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:44:43,023 INFO L93 Difference]: Finished difference Result 101 states and 111 transitions. [2024-11-28 02:44:43,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 02:44:43,025 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 29 [2024-11-28 02:44:43,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:44:43,026 INFO L225 Difference]: With dead ends: 101 [2024-11-28 02:44:43,026 INFO L226 Difference]: Without dead ends: 101 [2024-11-28 02:44:43,027 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 02:44:43,027 INFO L435 NwaCegarLoop]: 96 mSDtfsCounter, 26 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 02:44:43,028 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 210 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 02:44:43,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2024-11-28 02:44:43,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2024-11-28 02:44:43,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 56 states have (on average 1.625) internal successors, (91), 86 states have internal predecessors, (91), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-28 02:44:43,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 111 transitions. [2024-11-28 02:44:43,038 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 111 transitions. Word has length 29 [2024-11-28 02:44:43,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:44:43,040 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 111 transitions. [2024-11-28 02:44:43,040 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-28 02:44:43,040 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 111 transitions. [2024-11-28 02:44:43,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-28 02:44:43,041 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:44:43,041 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:44:43,041 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-28 02:44:43,042 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-28 02:44:43,042 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:44:43,042 INFO L85 PathProgramCache]: Analyzing trace with hash 799529722, now seen corresponding path program 1 times [2024-11-28 02:44:43,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:44:43,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795853322] [2024-11-28 02:44:43,043 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:44:43,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:44:43,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:44:44,001 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-28 02:44:44,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:44:44,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795853322] [2024-11-28 02:44:44,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795853322] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:44:44,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:44:44,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-28 02:44:44,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33984667] [2024-11-28 02:44:44,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:44:44,002 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 02:44:44,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:44:44,002 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 02:44:44,002 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-11-28 02:44:44,002 INFO L87 Difference]: Start difference. First operand 101 states and 111 transitions. Second operand has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 states have internal predecessors, (16), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-28 02:44:44,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:44:44,684 INFO L93 Difference]: Finished difference Result 127 states and 147 transitions. [2024-11-28 02:44:44,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 02:44:44,685 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 states have internal predecessors, (16), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 29 [2024-11-28 02:44:44,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:44:44,687 INFO L225 Difference]: With dead ends: 127 [2024-11-28 02:44:44,690 INFO L226 Difference]: Without dead ends: 127 [2024-11-28 02:44:44,690 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2024-11-28 02:44:44,691 INFO L435 NwaCegarLoop]: 98 mSDtfsCounter, 70 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 02:44:44,691 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 531 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 02:44:44,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-11-28 02:44:44,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 112. [2024-11-28 02:44:44,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 64 states have (on average 1.578125) internal successors, (101), 94 states have internal predecessors, (101), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-11-28 02:44:44,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 127 transitions. [2024-11-28 02:44:44,712 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 127 transitions. Word has length 29 [2024-11-28 02:44:44,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:44:44,712 INFO L471 AbstractCegarLoop]: Abstraction has 112 states and 127 transitions. [2024-11-28 02:44:44,713 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 states have internal predecessors, (16), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-28 02:44:44,713 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 127 transitions. [2024-11-28 02:44:44,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-28 02:44:44,714 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:44:44,715 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:44:44,715 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-28 02:44:44,715 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-28 02:44:44,716 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:44:44,717 INFO L85 PathProgramCache]: Analyzing trace with hash -984382359, now seen corresponding path program 1 times [2024-11-28 02:44:44,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:44:44,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756627921] [2024-11-28 02:44:44,718 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:44:44,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:44:44,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:44:44,823 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-28 02:44:44,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:44:44,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756627921] [2024-11-28 02:44:44,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756627921] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:44:44,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:44:44,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 02:44:44,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554444921] [2024-11-28 02:44:44,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:44:44,825 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 02:44:44,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:44:44,825 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 02:44:44,825 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 02:44:44,825 INFO L87 Difference]: Start difference. First operand 112 states and 127 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 02:44:44,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:44:44,938 INFO L93 Difference]: Finished difference Result 111 states and 126 transitions. [2024-11-28 02:44:44,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 02:44:44,939 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2024-11-28 02:44:44,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:44:44,941 INFO L225 Difference]: With dead ends: 111 [2024-11-28 02:44:44,941 INFO L226 Difference]: Without dead ends: 111 [2024-11-28 02:44:44,941 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 02:44:44,942 INFO L435 NwaCegarLoop]: 99 mSDtfsCounter, 26 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:44:44,942 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 217 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:44:44,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2024-11-28 02:44:44,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2024-11-28 02:44:44,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 64 states have (on average 1.5625) internal successors, (100), 93 states have internal predecessors, (100), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-11-28 02:44:44,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 126 transitions. [2024-11-28 02:44:44,951 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 126 transitions. Word has length 30 [2024-11-28 02:44:44,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:44:44,952 INFO L471 AbstractCegarLoop]: Abstraction has 111 states and 126 transitions. [2024-11-28 02:44:44,952 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 02:44:44,952 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 126 transitions. [2024-11-28 02:44:44,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-28 02:44:44,953 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:44:44,953 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:44:44,954 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-28 02:44:44,954 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-28 02:44:44,954 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:44:44,955 INFO L85 PathProgramCache]: Analyzing trace with hash -984382358, now seen corresponding path program 1 times [2024-11-28 02:44:44,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:44:44,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476772980] [2024-11-28 02:44:44,955 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:44:44,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:44:44,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:44:45,268 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-28 02:44:45,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:44:45,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476772980] [2024-11-28 02:44:45,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476772980] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:44:45,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:44:45,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 02:44:45,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581795308] [2024-11-28 02:44:45,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:44:45,270 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 02:44:45,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:44:45,270 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 02:44:45,270 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-28 02:44:45,271 INFO L87 Difference]: Start difference. First operand 111 states and 126 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-28 02:44:45,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:44:45,545 INFO L93 Difference]: Finished difference Result 115 states and 132 transitions. [2024-11-28 02:44:45,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 02:44:45,546 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 30 [2024-11-28 02:44:45,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:44:45,547 INFO L225 Difference]: With dead ends: 115 [2024-11-28 02:44:45,547 INFO L226 Difference]: Without dead ends: 115 [2024-11-28 02:44:45,547 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-28 02:44:45,548 INFO L435 NwaCegarLoop]: 102 mSDtfsCounter, 3 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 02:44:45,549 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 349 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 02:44:45,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2024-11-28 02:44:45,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2024-11-28 02:44:45,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 67 states have (on average 1.5671641791044777) internal successors, (105), 96 states have internal predecessors, (105), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-11-28 02:44:45,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 131 transitions. [2024-11-28 02:44:45,556 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 131 transitions. Word has length 30 [2024-11-28 02:44:45,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:44:45,556 INFO L471 AbstractCegarLoop]: Abstraction has 114 states and 131 transitions. [2024-11-28 02:44:45,557 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-28 02:44:45,557 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 131 transitions. [2024-11-28 02:44:45,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-28 02:44:45,558 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:44:45,558 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:44:45,558 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-28 02:44:45,558 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-28 02:44:45,559 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:44:45,559 INFO L85 PathProgramCache]: Analyzing trace with hash -581649962, now seen corresponding path program 1 times [2024-11-28 02:44:45,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:44:45,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270384845] [2024-11-28 02:44:45,559 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:44:45,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:44:45,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:44:46,172 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-28 02:44:46,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:44:46,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270384845] [2024-11-28 02:44:46,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270384845] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:44:46,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778002341] [2024-11-28 02:44:46,174 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:44:46,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:44:46,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:44:46,176 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:44:46,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 02:44:46,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:44:46,259 INFO L256 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-28 02:44:46,263 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:44:46,426 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 [2024-11-28 02:44:46,447 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 7 [2024-11-28 02:44:46,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:44:46,862 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 43 treesize of output 32 [2024-11-28 02:44:46,876 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-28 02:44:46,876 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 [2024-11-28 02:44:47,269 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 02:44:47,269 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:44:47,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778002341] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:44:47,512 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 02:44:47,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2024-11-28 02:44:47,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427487464] [2024-11-28 02:44:47,512 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 02:44:47,513 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-28 02:44:47,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:44:47,513 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-28 02:44:47,514 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2024-11-28 02:44:47,514 INFO L87 Difference]: Start difference. First operand 114 states and 131 transitions. Second operand has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 18 states have internal predecessors, (36), 7 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-28 02:44:49,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:44:49,202 INFO L93 Difference]: Finished difference Result 117 states and 132 transitions. [2024-11-28 02:44:49,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-28 02:44:49,203 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 18 states have internal predecessors, (36), 7 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 31 [2024-11-28 02:44:49,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:44:49,204 INFO L225 Difference]: With dead ends: 117 [2024-11-28 02:44:49,204 INFO L226 Difference]: Without dead ends: 117 [2024-11-28 02:44:49,205 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=157, Invalid=773, Unknown=0, NotChecked=0, Total=930 [2024-11-28 02:44:49,206 INFO L435 NwaCegarLoop]: 52 mSDtfsCounter, 219 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 679 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-28 02:44:49,206 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 468 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 679 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-28 02:44:49,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2024-11-28 02:44:49,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 101. [2024-11-28 02:44:49,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 59 states have (on average 1.5423728813559323) internal successors, (91), 86 states have internal predecessors, (91), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-28 02:44:49,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 111 transitions. [2024-11-28 02:44:49,214 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 111 transitions. Word has length 31 [2024-11-28 02:44:49,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:44:49,215 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 111 transitions. [2024-11-28 02:44:49,215 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 18 states have internal predecessors, (36), 7 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-28 02:44:49,215 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 111 transitions. [2024-11-28 02:44:49,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-28 02:44:49,216 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:44:49,216 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:44:49,227 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-28 02:44:49,421 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-28 02:44:49,421 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-28 02:44:49,421 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:44:49,422 INFO L85 PathProgramCache]: Analyzing trace with hash 301908321, now seen corresponding path program 1 times [2024-11-28 02:44:49,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:44:49,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634068062] [2024-11-28 02:44:49,422 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:44:49,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:44:49,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:44:49,716 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 02:44:49,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:44:49,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634068062] [2024-11-28 02:44:49,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634068062] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:44:49,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838151874] [2024-11-28 02:44:49,716 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:44:49,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:44:49,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:44:49,719 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:44:49,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 02:44:49,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:44:49,798 INFO L256 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-28 02:44:49,801 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:44:49,867 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 [2024-11-28 02:44:49,885 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 [2024-11-28 02:44:50,051 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-28 02:44:50,051 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 [2024-11-28 02:44:50,068 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 [2024-11-28 02:44:50,767 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:44:50,767 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:44:51,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838151874] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:44:51,283 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 02:44:51,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2024-11-28 02:44:51,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859939034] [2024-11-28 02:44:51,284 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 02:44:51,284 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-28 02:44:51,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:44:51,286 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-28 02:44:51,287 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2024-11-28 02:44:51,288 INFO L87 Difference]: Start difference. First operand 101 states and 111 transitions. Second operand has 20 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 20 states have internal predecessors, (41), 7 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 5 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-28 02:44:52,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:44:52,922 INFO L93 Difference]: Finished difference Result 111 states and 123 transitions. [2024-11-28 02:44:52,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-28 02:44:52,923 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 20 states have internal predecessors, (41), 7 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 5 states have call predecessors, (8), 7 states have call successors, (8) Word has length 33 [2024-11-28 02:44:52,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:44:52,924 INFO L225 Difference]: With dead ends: 111 [2024-11-28 02:44:52,924 INFO L226 Difference]: Without dead ends: 108 [2024-11-28 02:44:52,925 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=235, Invalid=1247, Unknown=0, NotChecked=0, Total=1482 [2024-11-28 02:44:52,925 INFO L435 NwaCegarLoop]: 51 mSDtfsCounter, 197 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 802 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-28 02:44:52,926 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 555 Invalid, 848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 802 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-28 02:44:52,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2024-11-28 02:44:52,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 105. [2024-11-28 02:44:52,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 63 states have (on average 1.507936507936508) internal successors, (95), 90 states have internal predecessors, (95), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-28 02:44:52,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 115 transitions. [2024-11-28 02:44:52,932 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 115 transitions. Word has length 33 [2024-11-28 02:44:52,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:44:52,932 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 115 transitions. [2024-11-28 02:44:52,932 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 20 states have internal predecessors, (41), 7 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 5 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-28 02:44:52,932 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 115 transitions. [2024-11-28 02:44:52,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-28 02:44:52,933 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:44:52,933 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:44:52,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-28 02:44:53,138 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-28 02:44:53,138 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-28 02:44:53,138 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:44:53,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1995535751, now seen corresponding path program 1 times [2024-11-28 02:44:53,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:44:53,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707351652] [2024-11-28 02:44:53,139 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:44:53,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:44:53,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:44:53,608 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-28 02:44:53,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:44:53,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707351652] [2024-11-28 02:44:53,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707351652] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:44:53,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535517045] [2024-11-28 02:44:53,609 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:44:53,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:44:53,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:44:53,611 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:44:53,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 02:44:53,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:44:53,698 INFO L256 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-28 02:44:53,700 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:44:53,711 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 [2024-11-28 02:44:53,855 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2024-11-28 02:44:53,856 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 16 treesize of output 18 [2024-11-28 02:44:54,343 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-28 02:44:54,343 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:44:54,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535517045] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:44:54,695 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 02:44:54,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2024-11-28 02:44:54,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919816234] [2024-11-28 02:44:54,696 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 02:44:54,696 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-28 02:44:54,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:44:54,697 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-28 02:44:54,697 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2024-11-28 02:44:54,698 INFO L87 Difference]: Start difference. First operand 105 states and 115 transitions. Second operand has 14 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 14 states have internal predecessors, (35), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-28 02:44:55,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:44:55,187 INFO L93 Difference]: Finished difference Result 104 states and 114 transitions. [2024-11-28 02:44:55,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 02:44:55,187 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 14 states have internal predecessors, (35), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 36 [2024-11-28 02:44:55,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:44:55,188 INFO L225 Difference]: With dead ends: 104 [2024-11-28 02:44:55,188 INFO L226 Difference]: Without dead ends: 104 [2024-11-28 02:44:55,189 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2024-11-28 02:44:55,192 INFO L435 NwaCegarLoop]: 75 mSDtfsCounter, 102 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 02:44:55,193 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 358 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 02:44:55,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2024-11-28 02:44:55,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2024-11-28 02:44:55,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 63 states have (on average 1.492063492063492) internal successors, (94), 89 states have internal predecessors, (94), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-28 02:44:55,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 114 transitions. [2024-11-28 02:44:55,205 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 114 transitions. Word has length 36 [2024-11-28 02:44:55,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:44:55,205 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 114 transitions. [2024-11-28 02:44:55,206 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 14 states have internal predecessors, (35), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-28 02:44:55,206 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 114 transitions. [2024-11-28 02:44:55,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-28 02:44:55,209 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:44:55,209 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:44:55,218 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-28 02:44:55,409 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-28 02:44:55,410 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-28 02:44:55,410 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:44:55,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1931714780, now seen corresponding path program 1 times [2024-11-28 02:44:55,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:44:55,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821354155] [2024-11-28 02:44:55,411 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:44:55,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:44:55,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:44:56,151 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-28 02:44:56,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:44:56,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821354155] [2024-11-28 02:44:56,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821354155] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:44:56,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799572605] [2024-11-28 02:44:56,151 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:44:56,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:44:56,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:44:56,155 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:44:56,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 02:44:56,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:44:56,261 INFO L256 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-28 02:44:56,263 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:44:56,643 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 0 case distinctions, treesize of input 14 treesize of output 3 [2024-11-28 02:44:56,832 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-28 02:44:56,832 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:44:57,432 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-28 02:44:57,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799572605] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:44:57,433 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:44:57,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 16] total 35 [2024-11-28 02:44:57,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742410494] [2024-11-28 02:44:57,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:44:57,433 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-28 02:44:57,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:44:57,434 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-28 02:44:57,434 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1016, Unknown=0, NotChecked=0, Total=1190 [2024-11-28 02:44:57,435 INFO L87 Difference]: Start difference. First operand 104 states and 114 transitions. Second operand has 35 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 33 states have internal predecessors, (68), 9 states have call successors, (10), 1 states have call predecessors, (10), 2 states have return successors, (12), 8 states have call predecessors, (12), 9 states have call successors, (12) [2024-11-28 02:44:58,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:44:58,838 INFO L93 Difference]: Finished difference Result 129 states and 145 transitions. [2024-11-28 02:44:58,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-28 02:44:58,841 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 33 states have internal predecessors, (68), 9 states have call successors, (10), 1 states have call predecessors, (10), 2 states have return successors, (12), 8 states have call predecessors, (12), 9 states have call successors, (12) Word has length 39 [2024-11-28 02:44:58,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:44:58,842 INFO L225 Difference]: With dead ends: 129 [2024-11-28 02:44:58,843 INFO L226 Difference]: Without dead ends: 129 [2024-11-28 02:44:58,843 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=388, Invalid=2062, Unknown=0, NotChecked=0, Total=2450 [2024-11-28 02:44:58,844 INFO L435 NwaCegarLoop]: 96 mSDtfsCounter, 51 mSDsluCounter, 1246 mSDsCounter, 0 mSdLazyCounter, 930 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 1342 SdHoareTripleChecker+Invalid, 955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 930 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-28 02:44:58,844 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 1342 Invalid, 955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 930 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-28 02:44:58,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2024-11-28 02:44:58,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 121. [2024-11-28 02:44:58,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 78 states have (on average 1.3974358974358974) internal successors, (109), 103 states have internal predecessors, (109), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-11-28 02:44:58,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 135 transitions. [2024-11-28 02:44:58,855 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 135 transitions. Word has length 39 [2024-11-28 02:44:58,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:44:58,855 INFO L471 AbstractCegarLoop]: Abstraction has 121 states and 135 transitions. [2024-11-28 02:44:58,855 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 33 states have internal predecessors, (68), 9 states have call successors, (10), 1 states have call predecessors, (10), 2 states have return successors, (12), 8 states have call predecessors, (12), 9 states have call successors, (12) [2024-11-28 02:44:58,855 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 135 transitions. [2024-11-28 02:44:58,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-28 02:44:58,859 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:44:58,860 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:44:58,870 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-28 02:44:59,060 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:44:59,060 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting upsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-28 02:44:59,061 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:44:59,061 INFO L85 PathProgramCache]: Analyzing trace with hash 556054454, now seen corresponding path program 1 times [2024-11-28 02:44:59,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:44:59,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380548618] [2024-11-28 02:44:59,061 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:44:59,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:44:59,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:44:59,499 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-28 02:44:59,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:44:59,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380548618] [2024-11-28 02:44:59,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380548618] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:44:59,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757518806] [2024-11-28 02:44:59,499 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:44:59,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:44:59,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:44:59,504 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:44:59,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 02:44:59,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:44:59,594 INFO L256 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-28 02:44:59,596 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:44:59,915 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-28 02:44:59,915 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:45:00,534 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 71 treesize of output 65 [2024-11-28 02:45:01,001 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-28 02:45:01,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757518806] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:45:01,001 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:45:01,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 34 [2024-11-28 02:45:01,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262901340] [2024-11-28 02:45:01,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:45:01,004 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-28 02:45:01,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:45:01,005 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-28 02:45:01,005 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1019, Unknown=0, NotChecked=0, Total=1190 [2024-11-28 02:45:01,006 INFO L87 Difference]: Start difference. First operand 121 states and 135 transitions. Second operand has 35 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 32 states have internal predecessors, (58), 10 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-28 02:45:01,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:45:01,957 INFO L93 Difference]: Finished difference Result 169 states and 194 transitions. [2024-11-28 02:45:01,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-28 02:45:01,958 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 32 states have internal predecessors, (58), 10 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 42 [2024-11-28 02:45:01,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:45:01,960 INFO L225 Difference]: With dead ends: 169 [2024-11-28 02:45:01,960 INFO L226 Difference]: Without dead ends: 169 [2024-11-28 02:45:01,961 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=351, Invalid=2001, Unknown=0, NotChecked=0, Total=2352 [2024-11-28 02:45:01,961 INFO L435 NwaCegarLoop]: 87 mSDtfsCounter, 122 mSDsluCounter, 1129 mSDsCounter, 0 mSdLazyCounter, 680 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 1216 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-28 02:45:01,962 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 1216 Invalid, 710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 680 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-28 02:45:01,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2024-11-28 02:45:01,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 133. [2024-11-28 02:45:01,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 87 states have (on average 1.4482758620689655) internal successors, (126), 112 states have internal predecessors, (126), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-11-28 02:45:01,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 156 transitions. [2024-11-28 02:45:01,974 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 156 transitions. Word has length 42 [2024-11-28 02:45:01,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:45:01,976 INFO L471 AbstractCegarLoop]: Abstraction has 133 states and 156 transitions. [2024-11-28 02:45:01,976 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 32 states have internal predecessors, (58), 10 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-28 02:45:01,977 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 156 transitions. [2024-11-28 02:45:01,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-28 02:45:01,978 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:45:01,978 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:45:01,986 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-28 02:45:02,182 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-28 02:45:02,182 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting upsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-28 02:45:02,182 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:45:02,182 INFO L85 PathProgramCache]: Analyzing trace with hash 556054453, now seen corresponding path program 1 times [2024-11-28 02:45:02,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:45:02,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969755280] [2024-11-28 02:45:02,183 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:45:02,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:45:02,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:45:02,255 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-28 02:45:02,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:45:02,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969755280] [2024-11-28 02:45:02,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969755280] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:45:02,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:45:02,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 02:45:02,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041905736] [2024-11-28 02:45:02,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:45:02,256 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 02:45:02,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:45:02,256 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 02:45:02,257 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 02:45:02,257 INFO L87 Difference]: Start difference. First operand 133 states and 156 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 02:45:02,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:45:02,375 INFO L93 Difference]: Finished difference Result 130 states and 149 transitions. [2024-11-28 02:45:02,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 02:45:02,376 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 42 [2024-11-28 02:45:02,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:45:02,378 INFO L225 Difference]: With dead ends: 130 [2024-11-28 02:45:02,379 INFO L226 Difference]: Without dead ends: 130 [2024-11-28 02:45:02,379 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-28 02:45:02,380 INFO L435 NwaCegarLoop]: 84 mSDtfsCounter, 35 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:45:02,380 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 244 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:45:02,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2024-11-28 02:45:02,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2024-11-28 02:45:02,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 87 states have (on average 1.367816091954023) internal successors, (119), 109 states have internal predecessors, (119), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-11-28 02:45:02,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 149 transitions. [2024-11-28 02:45:02,390 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 149 transitions. Word has length 42 [2024-11-28 02:45:02,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:45:02,390 INFO L471 AbstractCegarLoop]: Abstraction has 130 states and 149 transitions. [2024-11-28 02:45:02,390 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 02:45:02,390 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 149 transitions. [2024-11-28 02:45:02,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-28 02:45:02,391 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:45:02,391 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:45:02,391 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-28 02:45:02,392 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting upsweepErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-28 02:45:02,392 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:45:02,392 INFO L85 PathProgramCache]: Analyzing trace with hash 57818879, now seen corresponding path program 1 times [2024-11-28 02:45:02,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:45:02,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36907780] [2024-11-28 02:45:02,394 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:45:02,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:45:02,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:45:02,720 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-28 02:45:02,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:45:02,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36907780] [2024-11-28 02:45:02,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36907780] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:45:02,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309449495] [2024-11-28 02:45:02,721 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:45:02,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:45:02,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:45:02,723 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:45:02,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 02:45:02,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:45:02,806 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-28 02:45:02,809 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:45:03,118 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-28 02:45:03,119 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:45:03,318 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 28 treesize of output 24 [2024-11-28 02:45:03,480 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-28 02:45:03,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309449495] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:45:03,482 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:45:03,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2024-11-28 02:45:03,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573322019] [2024-11-28 02:45:03,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:45:03,483 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-28 02:45:03,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:45:03,485 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-28 02:45:03,485 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=835, Unknown=0, NotChecked=0, Total=992 [2024-11-28 02:45:03,487 INFO L87 Difference]: Start difference. First operand 130 states and 149 transitions. Second operand has 32 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 29 states have internal predecessors, (61), 10 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-28 02:45:04,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:45:04,253 INFO L93 Difference]: Finished difference Result 142 states and 161 transitions. [2024-11-28 02:45:04,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-28 02:45:04,254 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 29 states have internal predecessors, (61), 10 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 43 [2024-11-28 02:45:04,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:45:04,255 INFO L225 Difference]: With dead ends: 142 [2024-11-28 02:45:04,255 INFO L226 Difference]: Without dead ends: 142 [2024-11-28 02:45:04,256 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=274, Invalid=1286, Unknown=0, NotChecked=0, Total=1560 [2024-11-28 02:45:04,257 INFO L435 NwaCegarLoop]: 85 mSDtfsCounter, 78 mSDsluCounter, 909 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 994 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 02:45:04,257 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 994 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 02:45:04,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2024-11-28 02:45:04,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 140. [2024-11-28 02:45:04,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 95 states have (on average 1.3263157894736841) internal successors, (126), 116 states have internal predecessors, (126), 17 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2024-11-28 02:45:04,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 160 transitions. [2024-11-28 02:45:04,264 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 160 transitions. Word has length 43 [2024-11-28 02:45:04,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:45:04,264 INFO L471 AbstractCegarLoop]: Abstraction has 140 states and 160 transitions. [2024-11-28 02:45:04,265 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 29 states have internal predecessors, (61), 10 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-28 02:45:04,265 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 160 transitions. [2024-11-28 02:45:04,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-28 02:45:04,266 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:45:04,266 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:45:04,276 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-28 02:45:04,466 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-28 02:45:04,466 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting upsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-28 02:45:04,467 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:45:04,467 INFO L85 PathProgramCache]: Analyzing trace with hash -271777190, now seen corresponding path program 1 times [2024-11-28 02:45:04,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:45:04,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242717318] [2024-11-28 02:45:04,467 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:45:04,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:45:04,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:45:04,641 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-28 02:45:04,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:45:04,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242717318] [2024-11-28 02:45:04,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242717318] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:45:04,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349462923] [2024-11-28 02:45:04,642 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:45:04,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:45:04,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:45:04,644 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:45:04,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 02:45:04,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:45:04,749 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-28 02:45:04,751 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:45:04,851 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-28 02:45:04,851 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:45:04,982 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-28 02:45:04,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349462923] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:45:04,982 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:45:04,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 17 [2024-11-28 02:45:04,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768087549] [2024-11-28 02:45:04,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:45:04,983 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-28 02:45:04,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:45:04,984 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-28 02:45:04,985 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2024-11-28 02:45:04,985 INFO L87 Difference]: Start difference. First operand 140 states and 160 transitions. Second operand has 17 states, 15 states have (on average 3.2) internal successors, (48), 15 states have internal predecessors, (48), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 02:45:05,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:45:05,132 INFO L93 Difference]: Finished difference Result 161 states and 185 transitions. [2024-11-28 02:45:05,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 02:45:05,134 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 3.2) internal successors, (48), 15 states have internal predecessors, (48), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 45 [2024-11-28 02:45:05,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:45:05,135 INFO L225 Difference]: With dead ends: 161 [2024-11-28 02:45:05,136 INFO L226 Difference]: Without dead ends: 161 [2024-11-28 02:45:05,136 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 78 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2024-11-28 02:45:05,136 INFO L435 NwaCegarLoop]: 90 mSDtfsCounter, 25 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:45:05,137 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 526 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:45:05,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2024-11-28 02:45:05,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 153. [2024-11-28 02:45:05,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 106 states have (on average 1.3018867924528301) internal successors, (138), 128 states have internal predecessors, (138), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2024-11-28 02:45:05,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 174 transitions. [2024-11-28 02:45:05,147 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 174 transitions. Word has length 45 [2024-11-28 02:45:05,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:45:05,148 INFO L471 AbstractCegarLoop]: Abstraction has 153 states and 174 transitions. [2024-11-28 02:45:05,148 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 3.2) internal successors, (48), 15 states have internal predecessors, (48), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 02:45:05,148 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 174 transitions. [2024-11-28 02:45:05,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-28 02:45:05,149 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:45:05,149 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:45:05,160 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-28 02:45:05,353 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-28 02:45:05,353 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting upsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-28 02:45:05,353 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:45:05,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1360809123, now seen corresponding path program 2 times [2024-11-28 02:45:05,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:45:05,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199652142] [2024-11-28 02:45:05,354 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:45:05,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:45:05,388 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:45:05,388 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:45:05,579 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 02:45:05,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:45:05,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199652142] [2024-11-28 02:45:05,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199652142] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:45:05,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838370934] [2024-11-28 02:45:05,579 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:45:05,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:45:05,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:45:05,582 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:45:05,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-28 02:45:05,688 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:45:05,689 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:45:05,690 INFO L256 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-28 02:45:05,692 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:45:05,917 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-28 02:45:05,917 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:45:06,250 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-28 02:45:06,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838370934] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:45:06,251 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:45:06,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 12] total 25 [2024-11-28 02:45:06,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289756816] [2024-11-28 02:45:06,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:45:06,251 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-28 02:45:06,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:45:06,252 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-28 02:45:06,253 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2024-11-28 02:45:06,253 INFO L87 Difference]: Start difference. First operand 153 states and 174 transitions. Second operand has 25 states, 24 states have (on average 3.125) internal successors, (75), 24 states have internal predecessors, (75), 5 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-28 02:45:06,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:45:06,740 INFO L93 Difference]: Finished difference Result 170 states and 195 transitions. [2024-11-28 02:45:06,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-28 02:45:06,742 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 3.125) internal successors, (75), 24 states have internal predecessors, (75), 5 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 51 [2024-11-28 02:45:06,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:45:06,743 INFO L225 Difference]: With dead ends: 170 [2024-11-28 02:45:06,743 INFO L226 Difference]: Without dead ends: 170 [2024-11-28 02:45:06,744 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=218, Invalid=904, Unknown=0, NotChecked=0, Total=1122 [2024-11-28 02:45:06,744 INFO L435 NwaCegarLoop]: 87 mSDtfsCounter, 55 mSDsluCounter, 878 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 965 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 02:45:06,745 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 965 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 02:45:06,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2024-11-28 02:45:06,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 165. [2024-11-28 02:45:06,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 118 states have (on average 1.2796610169491525) internal successors, (151), 140 states have internal predecessors, (151), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2024-11-28 02:45:06,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 187 transitions. [2024-11-28 02:45:06,761 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 187 transitions. Word has length 51 [2024-11-28 02:45:06,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:45:06,761 INFO L471 AbstractCegarLoop]: Abstraction has 165 states and 187 transitions. [2024-11-28 02:45:06,762 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 3.125) internal successors, (75), 24 states have internal predecessors, (75), 5 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-28 02:45:06,762 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 187 transitions. [2024-11-28 02:45:06,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-28 02:45:06,762 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:45:06,763 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:45:06,771 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-28 02:45:06,963 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-28 02:45:06,963 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-28 02:45:06,963 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:45:06,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1822111171, now seen corresponding path program 1 times [2024-11-28 02:45:06,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:45:06,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641262618] [2024-11-28 02:45:06,964 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:45:06,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:45:06,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:45:07,065 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-28 02:45:07,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:45:07,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641262618] [2024-11-28 02:45:07,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641262618] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:45:07,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:45:07,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 02:45:07,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365783660] [2024-11-28 02:45:07,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:45:07,066 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 02:45:07,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:45:07,067 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 02:45:07,067 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 02:45:07,067 INFO L87 Difference]: Start difference. First operand 165 states and 187 transitions. Second operand has 5 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-28 02:45:07,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:45:07,200 INFO L93 Difference]: Finished difference Result 160 states and 182 transitions. [2024-11-28 02:45:07,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 02:45:07,201 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 51 [2024-11-28 02:45:07,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:45:07,203 INFO L225 Difference]: With dead ends: 160 [2024-11-28 02:45:07,204 INFO L226 Difference]: Without dead ends: 160 [2024-11-28 02:45:07,204 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-28 02:45:07,204 INFO L435 NwaCegarLoop]: 74 mSDtfsCounter, 46 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:45:07,207 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 221 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:45:07,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2024-11-28 02:45:07,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2024-11-28 02:45:07,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 118 states have (on average 1.2372881355932204) internal successors, (146), 135 states have internal predecessors, (146), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2024-11-28 02:45:07,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 182 transitions. [2024-11-28 02:45:07,218 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 182 transitions. Word has length 51 [2024-11-28 02:45:07,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:45:07,218 INFO L471 AbstractCegarLoop]: Abstraction has 160 states and 182 transitions. [2024-11-28 02:45:07,219 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-28 02:45:07,220 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 182 transitions. [2024-11-28 02:45:07,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-28 02:45:07,221 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:45:07,222 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:45:07,222 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-28 02:45:07,222 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-28 02:45:07,222 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:45:07,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1822111172, now seen corresponding path program 1 times [2024-11-28 02:45:07,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:45:07,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631866204] [2024-11-28 02:45:07,223 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:45:07,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:45:07,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:45:07,675 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-28 02:45:07,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:45:07,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631866204] [2024-11-28 02:45:07,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631866204] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:45:07,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740549171] [2024-11-28 02:45:07,676 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:45:07,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:45:07,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:45:07,680 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:45:07,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-28 02:45:07,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:45:07,801 INFO L256 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-28 02:45:07,804 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:45:08,080 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-28 02:45:08,080 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:45:08,217 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 9 treesize of output 7 [2024-11-28 02:45:08,305 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 02:45:08,305 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 21 treesize of output 25 [2024-11-28 02:45:08,494 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-28 02:45:08,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740549171] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:45:08,494 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:45:08,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 32 [2024-11-28 02:45:08,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592212359] [2024-11-28 02:45:08,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:45:08,495 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-28 02:45:08,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:45:08,495 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-28 02:45:08,496 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=932, Unknown=0, NotChecked=0, Total=1056 [2024-11-28 02:45:08,496 INFO L87 Difference]: Start difference. First operand 160 states and 182 transitions. Second operand has 33 states, 32 states have (on average 2.46875) internal successors, (79), 30 states have internal predecessors, (79), 13 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2024-11-28 02:45:09,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:45:09,344 INFO L93 Difference]: Finished difference Result 203 states and 234 transitions. [2024-11-28 02:45:09,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-28 02:45:09,345 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.46875) internal successors, (79), 30 states have internal predecessors, (79), 13 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) Word has length 51 [2024-11-28 02:45:09,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:45:09,347 INFO L225 Difference]: With dead ends: 203 [2024-11-28 02:45:09,348 INFO L226 Difference]: Without dead ends: 203 [2024-11-28 02:45:09,349 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=187, Invalid=1373, Unknown=0, NotChecked=0, Total=1560 [2024-11-28 02:45:09,350 INFO L435 NwaCegarLoop]: 68 mSDtfsCounter, 141 mSDsluCounter, 995 mSDsCounter, 0 mSdLazyCounter, 952 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 1063 SdHoareTripleChecker+Invalid, 981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 952 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-28 02:45:09,350 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 1063 Invalid, 981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 952 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-28 02:45:09,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2024-11-28 02:45:09,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 186. [2024-11-28 02:45:09,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 140 states have (on average 1.2285714285714286) internal successors, (172), 155 states have internal predecessors, (172), 22 states have call successors, (22), 9 states have call predecessors, (22), 9 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2024-11-28 02:45:09,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 216 transitions. [2024-11-28 02:45:09,365 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 216 transitions. Word has length 51 [2024-11-28 02:45:09,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:45:09,366 INFO L471 AbstractCegarLoop]: Abstraction has 186 states and 216 transitions. [2024-11-28 02:45:09,366 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.46875) internal successors, (79), 30 states have internal predecessors, (79), 13 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2024-11-28 02:45:09,366 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 216 transitions. [2024-11-28 02:45:09,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-28 02:45:09,367 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:45:09,367 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:45:09,377 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-28 02:45:09,572 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-28 02:45:09,572 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting downsweepErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-28 02:45:09,572 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:45:09,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1577776721, now seen corresponding path program 1 times [2024-11-28 02:45:09,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:45:09,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811619576] [2024-11-28 02:45:09,573 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:45:09,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:45:09,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:45:10,017 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-28 02:45:10,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:45:10,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811619576] [2024-11-28 02:45:10,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811619576] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:45:10,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980760798] [2024-11-28 02:45:10,018 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:45:10,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:45:10,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:45:10,020 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:45:10,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-28 02:45:10,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:45:10,133 INFO L256 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-28 02:45:10,136 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:45:10,461 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-28 02:45:10,461 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:45:10,510 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 29 treesize of output 25 [2024-11-28 02:45:11,335 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-28 02:45:11,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980760798] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:45:11,335 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:45:11,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 32 [2024-11-28 02:45:11,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816923633] [2024-11-28 02:45:11,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:45:11,337 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-28 02:45:11,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:45:11,337 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-28 02:45:11,338 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=946, Unknown=0, NotChecked=0, Total=1056 [2024-11-28 02:45:11,338 INFO L87 Difference]: Start difference. First operand 186 states and 216 transitions. Second operand has 33 states, 32 states have (on average 2.6875) internal successors, (86), 30 states have internal predecessors, (86), 11 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2024-11-28 02:45:12,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:45:12,491 INFO L93 Difference]: Finished difference Result 245 states and 290 transitions. [2024-11-28 02:45:12,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-28 02:45:12,492 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.6875) internal successors, (86), 30 states have internal predecessors, (86), 11 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 54 [2024-11-28 02:45:12,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:45:12,493 INFO L225 Difference]: With dead ends: 245 [2024-11-28 02:45:12,494 INFO L226 Difference]: Without dead ends: 245 [2024-11-28 02:45:12,494 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=211, Invalid=1769, Unknown=0, NotChecked=0, Total=1980 [2024-11-28 02:45:12,495 INFO L435 NwaCegarLoop]: 67 mSDtfsCounter, 142 mSDsluCounter, 1297 mSDsCounter, 0 mSdLazyCounter, 984 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 1364 SdHoareTripleChecker+Invalid, 1028 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 984 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-28 02:45:12,495 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 1364 Invalid, 1028 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 984 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-28 02:45:12,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2024-11-28 02:45:12,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 199. [2024-11-28 02:45:12,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 151 states have (on average 1.1986754966887416) internal successors, (181), 165 states have internal predecessors, (181), 24 states have call successors, (24), 10 states have call predecessors, (24), 10 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2024-11-28 02:45:12,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 229 transitions. [2024-11-28 02:45:12,514 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 229 transitions. Word has length 54 [2024-11-28 02:45:12,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:45:12,515 INFO L471 AbstractCegarLoop]: Abstraction has 199 states and 229 transitions. [2024-11-28 02:45:12,515 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.6875) internal successors, (86), 30 states have internal predecessors, (86), 11 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2024-11-28 02:45:12,515 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 229 transitions. [2024-11-28 02:45:12,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-28 02:45:12,516 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:45:12,516 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:45:12,523 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-28 02:45:12,716 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-28 02:45:12,716 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting upsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-28 02:45:12,717 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:45:12,717 INFO L85 PathProgramCache]: Analyzing trace with hash 425677316, now seen corresponding path program 3 times [2024-11-28 02:45:12,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:45:12,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079304366] [2024-11-28 02:45:12,717 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:45:12,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:45:12,764 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 02:45:12,765 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:45:13,340 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-11-28 02:45:13,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:45:13,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079304366] [2024-11-28 02:45:13,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079304366] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:45:13,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268729293] [2024-11-28 02:45:13,341 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:45:13,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:45:13,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:45:13,343 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:45:13,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-28 02:45:13,446 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 02:45:13,446 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:45:13,447 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-28 02:45:13,449 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:45:14,249 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-28 02:45:14,249 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:45:15,107 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 50 treesize of output 46 [2024-11-28 02:45:15,416 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-28 02:45:15,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268729293] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:45:15,417 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:45:15,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 15] total 41 [2024-11-28 02:45:15,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955563483] [2024-11-28 02:45:15,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:45:15,417 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-11-28 02:45:15,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:45:15,418 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-11-28 02:45:15,419 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1523, Unknown=0, NotChecked=0, Total=1722 [2024-11-28 02:45:15,419 INFO L87 Difference]: Start difference. First operand 199 states and 229 transitions. Second operand has 42 states, 35 states have (on average 2.057142857142857) internal successors, (72), 36 states have internal predecessors, (72), 15 states have call successors, (15), 7 states have call predecessors, (15), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-28 02:45:16,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:45:16,676 INFO L93 Difference]: Finished difference Result 215 states and 248 transitions. [2024-11-28 02:45:16,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-28 02:45:16,676 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 35 states have (on average 2.057142857142857) internal successors, (72), 36 states have internal predecessors, (72), 15 states have call successors, (15), 7 states have call predecessors, (15), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 55 [2024-11-28 02:45:16,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:45:16,679 INFO L225 Difference]: With dead ends: 215 [2024-11-28 02:45:16,679 INFO L226 Difference]: Without dead ends: 215 [2024-11-28 02:45:16,680 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 837 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=378, Invalid=2702, Unknown=0, NotChecked=0, Total=3080 [2024-11-28 02:45:16,681 INFO L435 NwaCegarLoop]: 81 mSDtfsCounter, 62 mSDsluCounter, 1000 mSDsCounter, 0 mSdLazyCounter, 889 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 1081 SdHoareTripleChecker+Invalid, 920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-28 02:45:16,681 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 1081 Invalid, 920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 889 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-28 02:45:16,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2024-11-28 02:45:16,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 210. [2024-11-28 02:45:16,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 159 states have (on average 1.20125786163522) internal successors, (191), 173 states have internal predecessors, (191), 26 states have call successors, (26), 11 states have call predecessors, (26), 11 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2024-11-28 02:45:16,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 243 transitions. [2024-11-28 02:45:16,693 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 243 transitions. Word has length 55 [2024-11-28 02:45:16,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:45:16,694 INFO L471 AbstractCegarLoop]: Abstraction has 210 states and 243 transitions. [2024-11-28 02:45:16,694 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 35 states have (on average 2.057142857142857) internal successors, (72), 36 states have internal predecessors, (72), 15 states have call successors, (15), 7 states have call predecessors, (15), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-28 02:45:16,694 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 243 transitions. [2024-11-28 02:45:16,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-28 02:45:16,695 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:45:16,695 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:45:16,705 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-28 02:45:16,895 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-28 02:45:16,896 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting upsweepErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-28 02:45:16,896 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:45:16,896 INFO L85 PathProgramCache]: Analyzing trace with hash 311094897, now seen corresponding path program 1 times [2024-11-28 02:45:16,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:45:16,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858609990] [2024-11-28 02:45:16,896 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:45:16,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:45:16,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:45:17,389 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-28 02:45:17,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:45:17,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858609990] [2024-11-28 02:45:17,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858609990] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:45:17,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244077863] [2024-11-28 02:45:17,390 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:45:17,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:45:17,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:45:17,392 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:45:17,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-28 02:45:17,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:45:17,503 INFO L256 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-28 02:45:17,505 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:45:18,089 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-28 02:45:18,089 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:45:18,633 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 79 treesize of output 73 [2024-11-28 02:45:19,291 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-28 02:45:19,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244077863] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:45:19,291 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:45:19,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 15] total 45 [2024-11-28 02:45:19,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459362968] [2024-11-28 02:45:19,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:45:19,292 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-11-28 02:45:19,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:45:19,293 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-11-28 02:45:19,293 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=1825, Unknown=0, NotChecked=0, Total=2070 [2024-11-28 02:45:19,294 INFO L87 Difference]: Start difference. First operand 210 states and 243 transitions. Second operand has 46 states, 42 states have (on average 2.3333333333333335) internal successors, (98), 40 states have internal predecessors, (98), 14 states have call successors, (15), 7 states have call predecessors, (15), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2024-11-28 02:45:21,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:45:21,671 INFO L93 Difference]: Finished difference Result 276 states and 322 transitions. [2024-11-28 02:45:21,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-11-28 02:45:21,671 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 42 states have (on average 2.3333333333333335) internal successors, (98), 40 states have internal predecessors, (98), 14 states have call successors, (15), 7 states have call predecessors, (15), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 56 [2024-11-28 02:45:21,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:45:21,673 INFO L225 Difference]: With dead ends: 276 [2024-11-28 02:45:21,673 INFO L226 Difference]: Without dead ends: 276 [2024-11-28 02:45:21,673 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1290 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=624, Invalid=4926, Unknown=0, NotChecked=0, Total=5550 [2024-11-28 02:45:21,674 INFO L435 NwaCegarLoop]: 86 mSDtfsCounter, 193 mSDsluCounter, 1365 mSDsCounter, 0 mSdLazyCounter, 1628 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 1451 SdHoareTripleChecker+Invalid, 1721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:45:21,674 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 1451 Invalid, 1721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1628 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-28 02:45:21,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2024-11-28 02:45:21,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 221. [2024-11-28 02:45:21,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 167 states have (on average 1.1976047904191616) internal successors, (200), 181 states have internal predecessors, (200), 28 states have call successors, (28), 12 states have call predecessors, (28), 12 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2024-11-28 02:45:21,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 256 transitions. [2024-11-28 02:45:21,683 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 256 transitions. Word has length 56 [2024-11-28 02:45:21,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:45:21,684 INFO L471 AbstractCegarLoop]: Abstraction has 221 states and 256 transitions. [2024-11-28 02:45:21,684 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 42 states have (on average 2.3333333333333335) internal successors, (98), 40 states have internal predecessors, (98), 14 states have call successors, (15), 7 states have call predecessors, (15), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2024-11-28 02:45:21,684 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 256 transitions. [2024-11-28 02:45:21,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-28 02:45:21,685 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:45:21,685 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:45:21,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-28 02:45:21,885 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:45:21,885 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting upsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-28 02:45:21,886 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:45:21,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1686659764, now seen corresponding path program 4 times [2024-11-28 02:45:21,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:45:21,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3552292] [2024-11-28 02:45:21,886 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:45:21,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:45:21,904 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:45:21,904 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:45:22,093 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 7 proven. 28 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-28 02:45:22,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:45:22,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3552292] [2024-11-28 02:45:22,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3552292] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:45:22,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062339388] [2024-11-28 02:45:22,094 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:45:22,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:45:22,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:45:22,096 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:45:22,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-28 02:45:22,205 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:45:22,205 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:45:22,207 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-28 02:45:22,209 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:45:22,435 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 5 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-28 02:45:22,435 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:45:22,902 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 7 proven. 28 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-28 02:45:22,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062339388] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:45:22,902 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:45:22,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 31 [2024-11-28 02:45:22,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973621370] [2024-11-28 02:45:22,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:45:22,903 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-28 02:45:22,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:45:22,904 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-28 02:45:22,904 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=786, Unknown=0, NotChecked=0, Total=930 [2024-11-28 02:45:22,904 INFO L87 Difference]: Start difference. First operand 221 states and 256 transitions. Second operand has 31 states, 25 states have (on average 2.8) internal successors, (70), 26 states have internal predecessors, (70), 8 states have call successors, (11), 7 states have call predecessors, (11), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 02:45:23,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:45:23,471 INFO L93 Difference]: Finished difference Result 289 states and 334 transitions. [2024-11-28 02:45:23,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-28 02:45:23,471 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 25 states have (on average 2.8) internal successors, (70), 26 states have internal predecessors, (70), 8 states have call successors, (11), 7 states have call predecessors, (11), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 58 [2024-11-28 02:45:23,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:45:23,473 INFO L225 Difference]: With dead ends: 289 [2024-11-28 02:45:23,473 INFO L226 Difference]: Without dead ends: 289 [2024-11-28 02:45:23,473 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 94 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=244, Invalid=1396, Unknown=0, NotChecked=0, Total=1640 [2024-11-28 02:45:23,474 INFO L435 NwaCegarLoop]: 90 mSDtfsCounter, 81 mSDsluCounter, 1204 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 1294 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 02:45:23,474 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 1294 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 644 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 02:45:23,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2024-11-28 02:45:23,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 253. [2024-11-28 02:45:23,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 193 states have (on average 1.1865284974093264) internal successors, (229), 208 states have internal predecessors, (229), 31 states have call successors, (31), 15 states have call predecessors, (31), 15 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) [2024-11-28 02:45:23,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 291 transitions. [2024-11-28 02:45:23,493 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 291 transitions. Word has length 58 [2024-11-28 02:45:23,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:45:23,493 INFO L471 AbstractCegarLoop]: Abstraction has 253 states and 291 transitions. [2024-11-28 02:45:23,493 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 25 states have (on average 2.8) internal successors, (70), 26 states have internal predecessors, (70), 8 states have call successors, (11), 7 states have call predecessors, (11), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 02:45:23,493 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 291 transitions. [2024-11-28 02:45:23,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-28 02:45:23,495 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:45:23,495 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:45:23,507 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-28 02:45:23,700 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:45:23,700 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-28 02:45:23,701 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:45:23,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1646156301, now seen corresponding path program 1 times [2024-11-28 02:45:23,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:45:23,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627212355] [2024-11-28 02:45:23,701 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:45:23,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:45:23,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:45:23,948 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-28 02:45:23,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:45:23,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627212355] [2024-11-28 02:45:23,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627212355] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:45:23,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797874357] [2024-11-28 02:45:23,949 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:45:23,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:45:23,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:45:23,951 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:45:23,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-28 02:45:24,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:45:24,081 INFO L256 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-28 02:45:24,082 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:45:24,242 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-28 02:45:24,243 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:45:24,415 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-28 02:45:24,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797874357] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:45:24,415 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:45:24,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2024-11-28 02:45:24,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186955233] [2024-11-28 02:45:24,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:45:24,416 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-28 02:45:24,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:45:24,416 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-28 02:45:24,417 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2024-11-28 02:45:24,417 INFO L87 Difference]: Start difference. First operand 253 states and 291 transitions. Second operand has 29 states, 29 states have (on average 3.0344827586206895) internal successors, (88), 26 states have internal predecessors, (88), 11 states have call successors, (15), 5 states have call predecessors, (15), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2024-11-28 02:45:24,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:45:24,617 INFO L93 Difference]: Finished difference Result 267 states and 305 transitions. [2024-11-28 02:45:24,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 02:45:24,618 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.0344827586206895) internal successors, (88), 26 states have internal predecessors, (88), 11 states have call successors, (15), 5 states have call predecessors, (15), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) Word has length 61 [2024-11-28 02:45:24,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:45:24,619 INFO L225 Difference]: With dead ends: 267 [2024-11-28 02:45:24,619 INFO L226 Difference]: Without dead ends: 267 [2024-11-28 02:45:24,620 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=139, Invalid=791, Unknown=0, NotChecked=0, Total=930 [2024-11-28 02:45:24,621 INFO L435 NwaCegarLoop]: 77 mSDtfsCounter, 92 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 714 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 02:45:24,621 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 714 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 02:45:24,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2024-11-28 02:45:24,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 266. [2024-11-28 02:45:24,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 204 states have (on average 1.1764705882352942) internal successors, (240), 219 states have internal predecessors, (240), 32 states have call successors, (32), 16 states have call predecessors, (32), 16 states have return successors, (32), 30 states have call predecessors, (32), 32 states have call successors, (32) [2024-11-28 02:45:24,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 304 transitions. [2024-11-28 02:45:24,635 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 304 transitions. Word has length 61 [2024-11-28 02:45:24,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:45:24,635 INFO L471 AbstractCegarLoop]: Abstraction has 266 states and 304 transitions. [2024-11-28 02:45:24,635 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.0344827586206895) internal successors, (88), 26 states have internal predecessors, (88), 11 states have call successors, (15), 5 states have call predecessors, (15), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2024-11-28 02:45:24,635 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 304 transitions. [2024-11-28 02:45:24,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-11-28 02:45:24,636 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:45:24,637 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:45:24,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-28 02:45:24,837 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:45:24,837 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting upsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-28 02:45:24,838 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:45:24,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1317083391, now seen corresponding path program 1 times [2024-11-28 02:45:24,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:45:24,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645211490] [2024-11-28 02:45:24,838 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:45:24,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:45:24,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:45:25,773 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-28 02:45:25,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:45:25,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645211490] [2024-11-28 02:45:25,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645211490] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:45:25,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136257427] [2024-11-28 02:45:25,774 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:45:25,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:45:25,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:45:25,777 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:45:25,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-28 02:45:25,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:45:25,916 INFO L256 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-11-28 02:45:25,917 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:45:26,787 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 3 proven. 34 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-28 02:45:26,787 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:45:28,271 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 256 treesize of output 246 [2024-11-28 02:45:30,028 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 3 proven. 32 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-28 02:45:30,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136257427] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:45:30,028 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:45:30,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 16] total 53 [2024-11-28 02:45:30,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462346928] [2024-11-28 02:45:30,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:45:30,029 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2024-11-28 02:45:30,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:45:30,029 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2024-11-28 02:45:30,029 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=2589, Unknown=0, NotChecked=0, Total=2862 [2024-11-28 02:45:30,030 INFO L87 Difference]: Start difference. First operand 266 states and 304 transitions. Second operand has 54 states, 46 states have (on average 2.5217391304347827) internal successors, (116), 47 states have internal predecessors, (116), 15 states have call successors, (18), 8 states have call predecessors, (18), 3 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2024-11-28 02:45:36,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:45:36,840 INFO L93 Difference]: Finished difference Result 378 states and 425 transitions. [2024-11-28 02:45:36,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2024-11-28 02:45:36,845 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 46 states have (on average 2.5217391304347827) internal successors, (116), 47 states have internal predecessors, (116), 15 states have call successors, (18), 8 states have call predecessors, (18), 3 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) Word has length 64 [2024-11-28 02:45:36,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:45:36,847 INFO L225 Difference]: With dead ends: 378 [2024-11-28 02:45:36,847 INFO L226 Difference]: Without dead ends: 366 [2024-11-28 02:45:36,851 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2710 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=982, Invalid=9730, Unknown=0, NotChecked=0, Total=10712 [2024-11-28 02:45:36,853 INFO L435 NwaCegarLoop]: 108 mSDtfsCounter, 288 mSDsluCounter, 2750 mSDsCounter, 0 mSdLazyCounter, 2940 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 2858 SdHoareTripleChecker+Invalid, 3079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 2940 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2024-11-28 02:45:36,854 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 2858 Invalid, 3079 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 2940 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2024-11-28 02:45:36,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2024-11-28 02:45:36,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 277. [2024-11-28 02:45:36,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 212 states have (on average 1.1603773584905661) internal successors, (246), 227 states have internal predecessors, (246), 34 states have call successors, (34), 17 states have call predecessors, (34), 17 states have return successors, (34), 32 states have call predecessors, (34), 34 states have call successors, (34) [2024-11-28 02:45:36,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 314 transitions. [2024-11-28 02:45:36,869 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 314 transitions. Word has length 64 [2024-11-28 02:45:36,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:45:36,870 INFO L471 AbstractCegarLoop]: Abstraction has 277 states and 314 transitions. [2024-11-28 02:45:36,870 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 46 states have (on average 2.5217391304347827) internal successors, (116), 47 states have internal predecessors, (116), 15 states have call successors, (18), 8 states have call predecessors, (18), 3 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2024-11-28 02:45:36,870 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 314 transitions. [2024-11-28 02:45:36,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-28 02:45:36,871 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:45:36,871 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:45:36,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-28 02:45:37,071 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-28 02:45:37,072 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-28 02:45:37,072 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:45:37,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1442030824, now seen corresponding path program 1 times [2024-11-28 02:45:37,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:45:37,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727770848] [2024-11-28 02:45:37,073 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:45:37,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:45:37,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:45:37,144 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-28 02:45:37,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:45:37,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727770848] [2024-11-28 02:45:37,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727770848] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:45:37,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:45:37,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 02:45:37,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393148545] [2024-11-28 02:45:37,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:45:37,145 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 02:45:37,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:45:37,146 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 02:45:37,146 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 02:45:37,146 INFO L87 Difference]: Start difference. First operand 277 states and 314 transitions. Second operand has 4 states, 3 states have (on average 14.666666666666666) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-28 02:45:37,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:45:37,219 INFO L93 Difference]: Finished difference Result 276 states and 313 transitions. [2024-11-28 02:45:37,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 02:45:37,219 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 14.666666666666666) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 63 [2024-11-28 02:45:37,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:45:37,220 INFO L225 Difference]: With dead ends: 276 [2024-11-28 02:45:37,220 INFO L226 Difference]: Without dead ends: 276 [2024-11-28 02:45:37,221 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-28 02:45:37,221 INFO L435 NwaCegarLoop]: 84 mSDtfsCounter, 28 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:45:37,221 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 188 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:45:37,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2024-11-28 02:45:37,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 276. [2024-11-28 02:45:37,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 212 states have (on average 1.1556603773584906) internal successors, (245), 226 states have internal predecessors, (245), 34 states have call successors, (34), 17 states have call predecessors, (34), 17 states have return successors, (34), 32 states have call predecessors, (34), 34 states have call successors, (34) [2024-11-28 02:45:37,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 313 transitions. [2024-11-28 02:45:37,232 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 313 transitions. Word has length 63 [2024-11-28 02:45:37,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:45:37,233 INFO L471 AbstractCegarLoop]: Abstraction has 276 states and 313 transitions. [2024-11-28 02:45:37,233 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 14.666666666666666) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-28 02:45:37,233 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 313 transitions. [2024-11-28 02:45:37,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-28 02:45:37,233 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:45:37,234 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:45:37,234 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-11-28 02:45:37,234 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-28 02:45:37,234 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:45:37,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1442030825, now seen corresponding path program 1 times [2024-11-28 02:45:37,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:45:37,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815803574] [2024-11-28 02:45:37,235 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:45:37,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:45:37,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:45:37,597 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-28 02:45:37,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:45:37,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815803574] [2024-11-28 02:45:37,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815803574] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:45:37,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048205036] [2024-11-28 02:45:37,598 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:45:37,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:45:37,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:45:37,600 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:45:37,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-28 02:45:37,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:45:37,739 INFO L256 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-28 02:45:37,742 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:45:37,964 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-28 02:45:37,965 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:45:38,076 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 21 treesize of output 17 [2024-11-28 02:45:38,189 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 02:45:38,189 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 18 treesize of output 22 [2024-11-28 02:45:38,340 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-28 02:45:38,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048205036] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:45:38,341 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:45:38,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2024-11-28 02:45:38,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318507143] [2024-11-28 02:45:38,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:45:38,342 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-28 02:45:38,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:45:38,342 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-28 02:45:38,343 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2024-11-28 02:45:38,343 INFO L87 Difference]: Start difference. First operand 276 states and 313 transitions. Second operand has 27 states, 26 states have (on average 3.9615384615384617) internal successors, (103), 25 states have internal predecessors, (103), 9 states have call successors, (12), 1 states have call predecessors, (12), 4 states have return successors, (12), 10 states have call predecessors, (12), 9 states have call successors, (12) [2024-11-28 02:45:38,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:45:38,952 INFO L93 Difference]: Finished difference Result 307 states and 354 transitions. [2024-11-28 02:45:38,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-28 02:45:38,952 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.9615384615384617) internal successors, (103), 25 states have internal predecessors, (103), 9 states have call successors, (12), 1 states have call predecessors, (12), 4 states have return successors, (12), 10 states have call predecessors, (12), 9 states have call successors, (12) Word has length 63 [2024-11-28 02:45:38,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:45:38,954 INFO L225 Difference]: With dead ends: 307 [2024-11-28 02:45:38,954 INFO L226 Difference]: Without dead ends: 307 [2024-11-28 02:45:38,955 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 110 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=192, Invalid=1214, Unknown=0, NotChecked=0, Total=1406 [2024-11-28 02:45:38,955 INFO L435 NwaCegarLoop]: 55 mSDtfsCounter, 197 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 02:45:38,955 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 457 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 536 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 02:45:38,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2024-11-28 02:45:38,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 285. [2024-11-28 02:45:38,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 221 states have (on average 1.1719457013574661) internal successors, (259), 235 states have internal predecessors, (259), 34 states have call successors, (34), 17 states have call predecessors, (34), 17 states have return successors, (34), 32 states have call predecessors, (34), 34 states have call successors, (34) [2024-11-28 02:45:38,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 327 transitions. [2024-11-28 02:45:38,966 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 327 transitions. Word has length 63 [2024-11-28 02:45:38,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:45:38,967 INFO L471 AbstractCegarLoop]: Abstraction has 285 states and 327 transitions. [2024-11-28 02:45:38,967 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.9615384615384617) internal successors, (103), 25 states have internal predecessors, (103), 9 states have call successors, (12), 1 states have call predecessors, (12), 4 states have return successors, (12), 10 states have call predecessors, (12), 9 states have call successors, (12) [2024-11-28 02:45:38,967 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 327 transitions. [2024-11-28 02:45:38,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-28 02:45:38,968 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:45:38,968 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:45:38,978 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-28 02:45:39,169 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-28 02:45:39,169 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-28 02:45:39,169 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:45:39,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1482730436, now seen corresponding path program 1 times [2024-11-28 02:45:39,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:45:39,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104008036] [2024-11-28 02:45:39,170 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:45:39,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:45:39,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:45:39,300 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-28 02:45:39,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:45:39,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104008036] [2024-11-28 02:45:39,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104008036] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:45:39,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699367574] [2024-11-28 02:45:39,300 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:45:39,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:45:39,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:45:39,303 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:45:39,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-28 02:45:39,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:45:39,444 INFO L256 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-28 02:45:39,446 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:45:39,505 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-28 02:45:39,505 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:45:39,586 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-28 02:45:39,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699367574] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:45:39,586 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:45:39,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-28 02:45:39,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551147679] [2024-11-28 02:45:39,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:45:39,587 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 02:45:39,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:45:39,587 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 02:45:39,587 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-11-28 02:45:39,588 INFO L87 Difference]: Start difference. First operand 285 states and 327 transitions. Second operand has 12 states, 12 states have (on average 5.75) internal successors, (69), 12 states have internal predecessors, (69), 3 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-11-28 02:45:39,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:45:39,709 INFO L93 Difference]: Finished difference Result 288 states and 326 transitions. [2024-11-28 02:45:39,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 02:45:39,710 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.75) internal successors, (69), 12 states have internal predecessors, (69), 3 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 65 [2024-11-28 02:45:39,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:45:39,711 INFO L225 Difference]: With dead ends: 288 [2024-11-28 02:45:39,711 INFO L226 Difference]: Without dead ends: 288 [2024-11-28 02:45:39,712 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 122 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2024-11-28 02:45:39,712 INFO L435 NwaCegarLoop]: 80 mSDtfsCounter, 39 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:45:39,712 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 468 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:45:39,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2024-11-28 02:45:39,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 285. [2024-11-28 02:45:39,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 221 states have (on average 1.16289592760181) internal successors, (257), 235 states have internal predecessors, (257), 34 states have call successors, (34), 17 states have call predecessors, (34), 17 states have return successors, (34), 32 states have call predecessors, (34), 34 states have call successors, (34) [2024-11-28 02:45:39,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 325 transitions. [2024-11-28 02:45:39,723 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 325 transitions. Word has length 65 [2024-11-28 02:45:39,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:45:39,723 INFO L471 AbstractCegarLoop]: Abstraction has 285 states and 325 transitions. [2024-11-28 02:45:39,723 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.75) internal successors, (69), 12 states have internal predecessors, (69), 3 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-11-28 02:45:39,723 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 325 transitions. [2024-11-28 02:45:39,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-11-28 02:45:39,724 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:45:39,724 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:45:39,736 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-28 02:45:39,925 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-28 02:45:39,926 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-28 02:45:39,926 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:45:39,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1277473651, now seen corresponding path program 1 times [2024-11-28 02:45:39,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:45:39,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761542703] [2024-11-28 02:45:39,927 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:45:39,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:45:39,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:45:42,165 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-28 02:45:42,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:45:42,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761542703] [2024-11-28 02:45:42,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761542703] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:45:42,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410650711] [2024-11-28 02:45:42,165 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:45:42,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:45:42,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:45:42,167 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:45:42,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-28 02:45:42,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:45:42,302 INFO L256 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-11-28 02:45:42,305 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:45:42,682 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 treesize of output 9 [2024-11-28 02:45:42,911 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 23 treesize of output 19 [2024-11-28 02:45:42,972 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 9 treesize of output 3 [2024-11-28 02:45:43,134 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-28 02:45:43,135 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:45:43,325 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 23 treesize of output 21 [2024-11-28 02:45:43,331 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 27 treesize of output 25 [2024-11-28 02:45:43,496 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 36 treesize of output 32 [2024-11-28 02:45:44,184 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-28 02:45:44,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410650711] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:45:44,184 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:45:44,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 19, 17] total 52 [2024-11-28 02:45:44,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858723906] [2024-11-28 02:45:44,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:45:44,185 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-11-28 02:45:44,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:45:44,186 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-11-28 02:45:44,187 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=2461, Unknown=0, NotChecked=0, Total=2652 [2024-11-28 02:45:44,188 INFO L87 Difference]: Start difference. First operand 285 states and 325 transitions. Second operand has 52 states, 48 states have (on average 2.4791666666666665) internal successors, (119), 45 states have internal predecessors, (119), 10 states have call successors, (15), 3 states have call predecessors, (15), 7 states have return successors, (15), 10 states have call predecessors, (15), 10 states have call successors, (15) [2024-11-28 02:45:47,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:45:47,407 INFO L93 Difference]: Finished difference Result 349 states and 405 transitions. [2024-11-28 02:45:47,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-28 02:45:47,408 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 48 states have (on average 2.4791666666666665) internal successors, (119), 45 states have internal predecessors, (119), 10 states have call successors, (15), 3 states have call predecessors, (15), 7 states have return successors, (15), 10 states have call predecessors, (15), 10 states have call successors, (15) Word has length 66 [2024-11-28 02:45:47,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:45:47,409 INFO L225 Difference]: With dead ends: 349 [2024-11-28 02:45:47,409 INFO L226 Difference]: Without dead ends: 349 [2024-11-28 02:45:47,412 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1456 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=512, Invalid=5968, Unknown=0, NotChecked=0, Total=6480 [2024-11-28 02:45:47,413 INFO L435 NwaCegarLoop]: 46 mSDtfsCounter, 107 mSDsluCounter, 1218 mSDsCounter, 0 mSdLazyCounter, 1998 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 1264 SdHoareTripleChecker+Invalid, 2027 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1998 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-11-28 02:45:47,415 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 1264 Invalid, 2027 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1998 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-11-28 02:45:47,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2024-11-28 02:45:47,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 290. [2024-11-28 02:45:47,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 226 states have (on average 1.1592920353982301) internal successors, (262), 239 states have internal predecessors, (262), 34 states have call successors, (34), 17 states have call predecessors, (34), 17 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2024-11-28 02:45:47,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 330 transitions. [2024-11-28 02:45:47,429 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 330 transitions. Word has length 66 [2024-11-28 02:45:47,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:45:47,430 INFO L471 AbstractCegarLoop]: Abstraction has 290 states and 330 transitions. [2024-11-28 02:45:47,430 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 48 states have (on average 2.4791666666666665) internal successors, (119), 45 states have internal predecessors, (119), 10 states have call successors, (15), 3 states have call predecessors, (15), 7 states have return successors, (15), 10 states have call predecessors, (15), 10 states have call successors, (15) [2024-11-28 02:45:47,430 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 330 transitions. [2024-11-28 02:45:47,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-28 02:45:47,432 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:45:47,432 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:45:47,444 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-28 02:45:47,632 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:45:47,633 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-28 02:45:47,633 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:45:47,633 INFO L85 PathProgramCache]: Analyzing trace with hash 946983634, now seen corresponding path program 1 times [2024-11-28 02:45:47,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:45:47,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859872509] [2024-11-28 02:45:47,633 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:45:47,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:45:47,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:45:47,744 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-28 02:45:47,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:45:47,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859872509] [2024-11-28 02:45:47,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859872509] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:45:47,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:45:47,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 02:45:47,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577616409] [2024-11-28 02:45:47,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:45:47,745 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 02:45:47,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:45:47,745 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 02:45:47,745 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 02:45:47,745 INFO L87 Difference]: Start difference. First operand 290 states and 330 transitions. Second operand has 5 states, 4 states have (on average 11.5) internal successors, (46), 5 states have internal predecessors, (46), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-28 02:45:47,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:45:47,851 INFO L93 Difference]: Finished difference Result 289 states and 328 transitions. [2024-11-28 02:45:47,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 02:45:47,852 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 11.5) internal successors, (46), 5 states have internal predecessors, (46), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 67 [2024-11-28 02:45:47,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:45:47,854 INFO L225 Difference]: With dead ends: 289 [2024-11-28 02:45:47,854 INFO L226 Difference]: Without dead ends: 289 [2024-11-28 02:45:47,854 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-28 02:45:47,855 INFO L435 NwaCegarLoop]: 83 mSDtfsCounter, 23 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:45:47,855 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 241 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:45:47,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2024-11-28 02:45:47,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2024-11-28 02:45:47,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 226 states have (on average 1.1504424778761062) internal successors, (260), 238 states have internal predecessors, (260), 34 states have call successors, (34), 17 states have call predecessors, (34), 17 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2024-11-28 02:45:47,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 328 transitions. [2024-11-28 02:45:47,869 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 328 transitions. Word has length 67 [2024-11-28 02:45:47,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:45:47,869 INFO L471 AbstractCegarLoop]: Abstraction has 289 states and 328 transitions. [2024-11-28 02:45:47,869 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 11.5) internal successors, (46), 5 states have internal predecessors, (46), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-28 02:45:47,869 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 328 transitions. [2024-11-28 02:45:47,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-28 02:45:47,870 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:45:47,870 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:45:47,871 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-11-28 02:45:47,871 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-28 02:45:47,871 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:45:47,871 INFO L85 PathProgramCache]: Analyzing trace with hash 946983635, now seen corresponding path program 1 times [2024-11-28 02:45:47,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:45:47,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761500548] [2024-11-28 02:45:47,872 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:45:47,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:45:47,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:45:48,128 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-28 02:45:48,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:45:48,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761500548] [2024-11-28 02:45:48,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761500548] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:45:48,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091558290] [2024-11-28 02:45:48,129 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:45:48,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:45:48,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:45:48,131 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:45:48,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-28 02:45:48,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:45:48,295 INFO L256 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-28 02:45:48,297 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:45:48,587 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-28 02:45:48,587 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:45:48,689 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 22 treesize of output 18 [2024-11-28 02:45:48,755 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-28 02:45:48,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091558290] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:45:48,755 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:45:48,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 15 [2024-11-28 02:45:48,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496809468] [2024-11-28 02:45:48,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:45:48,756 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-28 02:45:48,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:45:48,757 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-28 02:45:48,757 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2024-11-28 02:45:48,757 INFO L87 Difference]: Start difference. First operand 289 states and 328 transitions. Second operand has 16 states, 15 states have (on average 6.8) internal successors, (102), 16 states have internal predecessors, (102), 6 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2024-11-28 02:45:49,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:45:49,136 INFO L93 Difference]: Finished difference Result 296 states and 333 transitions. [2024-11-28 02:45:49,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 02:45:49,138 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 6.8) internal successors, (102), 16 states have internal predecessors, (102), 6 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) Word has length 67 [2024-11-28 02:45:49,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:45:49,139 INFO L225 Difference]: With dead ends: 296 [2024-11-28 02:45:49,139 INFO L226 Difference]: Without dead ends: 296 [2024-11-28 02:45:49,140 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 120 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2024-11-28 02:45:49,140 INFO L435 NwaCegarLoop]: 63 mSDtfsCounter, 115 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 620 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 02:45:49,140 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 620 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 02:45:49,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2024-11-28 02:45:49,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 292. [2024-11-28 02:45:49,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 230 states have (on average 1.1434782608695653) internal successors, (263), 241 states have internal predecessors, (263), 34 states have call successors, (34), 17 states have call predecessors, (34), 17 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2024-11-28 02:45:49,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 331 transitions. [2024-11-28 02:45:49,151 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 331 transitions. Word has length 67 [2024-11-28 02:45:49,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:45:49,152 INFO L471 AbstractCegarLoop]: Abstraction has 292 states and 331 transitions. [2024-11-28 02:45:49,152 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 6.8) internal successors, (102), 16 states have internal predecessors, (102), 6 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2024-11-28 02:45:49,152 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 331 transitions. [2024-11-28 02:45:49,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-11-28 02:45:49,153 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:45:49,153 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:45:49,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-28 02:45:49,357 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-28 02:45:49,357 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting upsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-28 02:45:49,357 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:45:49,357 INFO L85 PathProgramCache]: Analyzing trace with hash -821598665, now seen corresponding path program 5 times [2024-11-28 02:45:49,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:45:49,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853806866] [2024-11-28 02:45:49,358 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 02:45:49,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:45:49,409 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-11-28 02:45:49,409 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:45:49,920 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 02:45:49,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:45:49,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853806866] [2024-11-28 02:45:49,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853806866] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:45:49,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867400992] [2024-11-28 02:45:49,921 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 02:45:49,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:45:49,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:45:49,923 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:45:49,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-28 02:45:51,051 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-11-28 02:45:51,051 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:45:51,053 INFO L256 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-28 02:45:51,055 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:45:51,446 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-28 02:45:51,446 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:45:52,517 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 9 proven. 91 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-28 02:45:52,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867400992] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:45:52,517 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:45:52,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 19] total 43 [2024-11-28 02:45:52,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256248038] [2024-11-28 02:45:52,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:45:52,518 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-28 02:45:52,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:45:52,519 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-28 02:45:52,519 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=1583, Unknown=0, NotChecked=0, Total=1806 [2024-11-28 02:45:52,519 INFO L87 Difference]: Start difference. First operand 292 states and 331 transitions. Second operand has 43 states, 41 states have (on average 3.097560975609756) internal successors, (127), 41 states have internal predecessors, (127), 7 states have call successors, (12), 4 states have call predecessors, (12), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-28 02:45:55,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:45:55,062 INFO L93 Difference]: Finished difference Result 358 states and 408 transitions. [2024-11-28 02:45:55,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-11-28 02:45:55,064 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 41 states have (on average 3.097560975609756) internal successors, (127), 41 states have internal predecessors, (127), 7 states have call successors, (12), 4 states have call predecessors, (12), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 70 [2024-11-28 02:45:55,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:45:55,065 INFO L225 Difference]: With dead ends: 358 [2024-11-28 02:45:55,065 INFO L226 Difference]: Without dead ends: 358 [2024-11-28 02:45:55,066 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1024 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=656, Invalid=4746, Unknown=0, NotChecked=0, Total=5402 [2024-11-28 02:45:55,067 INFO L435 NwaCegarLoop]: 82 mSDtfsCounter, 174 mSDsluCounter, 1382 mSDsCounter, 0 mSdLazyCounter, 1325 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 1464 SdHoareTripleChecker+Invalid, 1381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-28 02:45:55,067 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 1464 Invalid, 1381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1325 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-28 02:45:55,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2024-11-28 02:45:55,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 320. [2024-11-28 02:45:55,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 258 states have (on average 1.1511627906976745) internal successors, (297), 269 states have internal predecessors, (297), 34 states have call successors, (34), 17 states have call predecessors, (34), 17 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2024-11-28 02:45:55,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 365 transitions. [2024-11-28 02:45:55,079 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 365 transitions. Word has length 70 [2024-11-28 02:45:55,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:45:55,079 INFO L471 AbstractCegarLoop]: Abstraction has 320 states and 365 transitions. [2024-11-28 02:45:55,080 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 41 states have (on average 3.097560975609756) internal successors, (127), 41 states have internal predecessors, (127), 7 states have call successors, (12), 4 states have call predecessors, (12), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-28 02:45:55,080 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 365 transitions. [2024-11-28 02:45:55,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-11-28 02:45:55,081 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:45:55,081 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:45:55,093 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-28 02:45:55,281 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-28 02:45:55,282 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting upsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-28 02:45:55,282 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:45:55,282 INFO L85 PathProgramCache]: Analyzing trace with hash 562946096, now seen corresponding path program 6 times [2024-11-28 02:45:55,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:45:55,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896374241] [2024-11-28 02:45:55,282 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 02:45:55,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:45:55,352 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-28 02:45:55,356 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:45:56,161 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2024-11-28 02:45:56,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:45:56,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896374241] [2024-11-28 02:45:56,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896374241] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:45:56,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427784589] [2024-11-28 02:45:56,162 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 02:45:56,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:45:56,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:45:56,164 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:45:56,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-28 02:45:56,347 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-28 02:45:56,347 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:45:56,350 INFO L256 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-11-28 02:45:56,353 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:45:58,607 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 18 proven. 69 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-11-28 02:45:58,607 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:46:00,020 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 20 treesize of output 16 [2024-11-28 02:46:00,628 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 6 proven. 81 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-11-28 02:46:00,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427784589] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:46:00,629 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:46:00,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 21, 21] total 55 [2024-11-28 02:46:00,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147974950] [2024-11-28 02:46:00,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:46:00,629 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-11-28 02:46:00,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:46:00,630 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-11-28 02:46:00,630 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=336, Invalid=2744, Unknown=0, NotChecked=0, Total=3080 [2024-11-28 02:46:00,631 INFO L87 Difference]: Start difference. First operand 320 states and 365 transitions. Second operand has 56 states, 46 states have (on average 1.9565217391304348) internal successors, (90), 47 states have internal predecessors, (90), 17 states have call successors, (17), 10 states have call predecessors, (17), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-28 02:46:04,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:46:04,608 INFO L93 Difference]: Finished difference Result 371 states and 426 transitions. [2024-11-28 02:46:04,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-28 02:46:04,609 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 46 states have (on average 1.9565217391304348) internal successors, (90), 47 states have internal predecessors, (90), 17 states have call successors, (17), 10 states have call predecessors, (17), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 74 [2024-11-28 02:46:04,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:46:04,610 INFO L225 Difference]: With dead ends: 371 [2024-11-28 02:46:04,610 INFO L226 Difference]: Without dead ends: 371 [2024-11-28 02:46:04,610 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1943 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=863, Invalid=5943, Unknown=0, NotChecked=0, Total=6806 [2024-11-28 02:46:04,611 INFO L435 NwaCegarLoop]: 80 mSDtfsCounter, 150 mSDsluCounter, 1394 mSDsCounter, 0 mSdLazyCounter, 1488 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 1474 SdHoareTripleChecker+Invalid, 1585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-28 02:46:04,611 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 1474 Invalid, 1585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1488 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-28 02:46:04,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2024-11-28 02:46:04,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 363. [2024-11-28 02:46:04,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 289 states have (on average 1.1591695501730104) internal successors, (335), 300 states have internal predecessors, (335), 42 states have call successors, (42), 21 states have call predecessors, (42), 21 states have return successors, (42), 41 states have call predecessors, (42), 42 states have call successors, (42) [2024-11-28 02:46:04,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 419 transitions. [2024-11-28 02:46:04,622 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 419 transitions. Word has length 74 [2024-11-28 02:46:04,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:46:04,622 INFO L471 AbstractCegarLoop]: Abstraction has 363 states and 419 transitions. [2024-11-28 02:46:04,622 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 46 states have (on average 1.9565217391304348) internal successors, (90), 47 states have internal predecessors, (90), 17 states have call successors, (17), 10 states have call predecessors, (17), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-28 02:46:04,622 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 419 transitions. [2024-11-28 02:46:04,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-28 02:46:04,623 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:46:04,623 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:46:04,634 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-28 02:46:04,823 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:46:04,824 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-28 02:46:04,824 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:46:04,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1523824511, now seen corresponding path program 1 times [2024-11-28 02:46:04,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:46:04,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235596455] [2024-11-28 02:46:04,824 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:46:04,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:46:04,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:46:09,454 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-28 02:46:09,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:46:09,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235596455] [2024-11-28 02:46:09,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235596455] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:46:09,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979154619] [2024-11-28 02:46:09,455 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:46:09,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:46:09,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:46:09,457 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:46:09,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-28 02:46:09,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:46:09,618 INFO L256 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 127 conjuncts are in the unsatisfiable core [2024-11-28 02:46:09,623 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:46:09,724 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 [2024-11-28 02:46:09,839 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 treesize of output 6 [2024-11-28 02:46:10,004 INFO L349 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2024-11-28 02:46:10,005 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2024-11-28 02:46:10,151 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 10 [2024-11-28 02:46:10,357 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2024-11-28 02:46:10,360 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 11 treesize of output 10 [2024-11-28 02:46:10,656 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2024-11-28 02:46:10,663 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 0 case distinctions, treesize of input 25 treesize of output 14 [2024-11-28 02:46:11,047 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2024-11-28 02:46:11,146 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2024-11-28 02:46:11,703 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 39 [2024-11-28 02:46:12,213 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 39 [2024-11-28 02:46:12,215 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 14 treesize of output 10 [2024-11-28 02:46:12,323 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 02:46:12,323 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:46:13,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979154619] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:46:13,174 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 02:46:13,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 32] total 64 [2024-11-28 02:46:13,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629695416] [2024-11-28 02:46:13,175 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 02:46:13,175 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2024-11-28 02:46:13,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:46:13,176 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2024-11-28 02:46:13,176 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=4580, Unknown=0, NotChecked=0, Total=4830 [2024-11-28 02:46:13,177 INFO L87 Difference]: Start difference. First operand 363 states and 419 transitions. Second operand has 64 states, 58 states have (on average 1.896551724137931) internal successors, (110), 55 states have internal predecessors, (110), 9 states have call successors, (11), 3 states have call predecessors, (11), 9 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) [2024-11-28 02:46:18,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:46:18,575 INFO L93 Difference]: Finished difference Result 437 states and 515 transitions. [2024-11-28 02:46:18,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-11-28 02:46:18,576 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 58 states have (on average 1.896551724137931) internal successors, (110), 55 states have internal predecessors, (110), 9 states have call successors, (11), 3 states have call predecessors, (11), 9 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) Word has length 73 [2024-11-28 02:46:18,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:46:18,578 INFO L225 Difference]: With dead ends: 437 [2024-11-28 02:46:18,578 INFO L226 Difference]: Without dead ends: 437 [2024-11-28 02:46:18,579 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 57 SyntacticMatches, 4 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3507 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=733, Invalid=11699, Unknown=0, NotChecked=0, Total=12432 [2024-11-28 02:46:18,580 INFO L435 NwaCegarLoop]: 44 mSDtfsCounter, 173 mSDsluCounter, 1170 mSDsCounter, 0 mSdLazyCounter, 2631 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 1214 SdHoareTripleChecker+Invalid, 2677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 2631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2024-11-28 02:46:18,580 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 1214 Invalid, 2677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 2631 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2024-11-28 02:46:18,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2024-11-28 02:46:18,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 370. [2024-11-28 02:46:18,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 296 states have (on average 1.1554054054054055) internal successors, (342), 307 states have internal predecessors, (342), 42 states have call successors, (42), 21 states have call predecessors, (42), 21 states have return successors, (42), 41 states have call predecessors, (42), 42 states have call successors, (42) [2024-11-28 02:46:18,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 426 transitions. [2024-11-28 02:46:18,593 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 426 transitions. Word has length 73 [2024-11-28 02:46:18,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:46:18,594 INFO L471 AbstractCegarLoop]: Abstraction has 370 states and 426 transitions. [2024-11-28 02:46:18,594 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 58 states have (on average 1.896551724137931) internal successors, (110), 55 states have internal predecessors, (110), 9 states have call successors, (11), 3 states have call predecessors, (11), 9 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) [2024-11-28 02:46:18,594 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 426 transitions. [2024-11-28 02:46:18,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-11-28 02:46:18,596 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:46:18,596 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:46:18,607 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-28 02:46:18,796 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:46:18,797 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting upsweepErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-28 02:46:18,797 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:46:18,798 INFO L85 PathProgramCache]: Analyzing trace with hash 271459781, now seen corresponding path program 2 times [2024-11-28 02:46:18,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:46:18,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035945004] [2024-11-28 02:46:18,799 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:46:18,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:46:18,831 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:46:18,831 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:46:19,848 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 72 proven. 58 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-28 02:46:19,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:46:19,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035945004] [2024-11-28 02:46:19,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035945004] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:46:19,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109082218] [2024-11-28 02:46:19,848 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:46:19,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:46:19,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:46:19,850 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:46:19,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-28 02:46:20,008 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:46:20,008 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:46:20,010 INFO L256 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 74 conjuncts are in the unsatisfiable core [2024-11-28 02:46:20,012 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:46:21,357 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 129 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-28 02:46:21,357 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:46:24,186 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 322 treesize of output 316 [2024-11-28 02:46:24,243 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2024-11-28 02:46:24,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109082218] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:46:24,244 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:46:24,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27, 14] total 65 [2024-11-28 02:46:24,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960330969] [2024-11-28 02:46:24,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:46:24,245 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2024-11-28 02:46:24,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:46:24,245 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2024-11-28 02:46:24,246 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=3960, Unknown=0, NotChecked=0, Total=4290 [2024-11-28 02:46:24,246 INFO L87 Difference]: Start difference. First operand 370 states and 426 transitions. Second operand has 66 states, 56 states have (on average 2.4285714285714284) internal successors, (136), 57 states have internal predecessors, (136), 16 states have call successors, (19), 10 states have call predecessors, (19), 2 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-28 02:46:35,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:46:35,716 INFO L93 Difference]: Finished difference Result 635 states and 735 transitions. [2024-11-28 02:46:35,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2024-11-28 02:46:35,717 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 56 states have (on average 2.4285714285714284) internal successors, (136), 57 states have internal predecessors, (136), 16 states have call successors, (19), 10 states have call predecessors, (19), 2 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) Word has length 75 [2024-11-28 02:46:35,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:46:35,720 INFO L225 Difference]: With dead ends: 635 [2024-11-28 02:46:35,720 INFO L226 Difference]: Without dead ends: 635 [2024-11-28 02:46:35,722 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5346 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=1827, Invalid=17355, Unknown=0, NotChecked=0, Total=19182 [2024-11-28 02:46:35,724 INFO L435 NwaCegarLoop]: 104 mSDtfsCounter, 313 mSDsluCounter, 2094 mSDsCounter, 0 mSdLazyCounter, 3988 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 2198 SdHoareTripleChecker+Invalid, 4146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 3988 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2024-11-28 02:46:35,724 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [315 Valid, 2198 Invalid, 4146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 3988 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2024-11-28 02:46:35,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2024-11-28 02:46:35,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 550. [2024-11-28 02:46:35,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 430 states have (on average 1.1674418604651162) internal successors, (502), 442 states have internal predecessors, (502), 73 states have call successors, (73), 36 states have call predecessors, (73), 36 states have return successors, (73), 71 states have call predecessors, (73), 73 states have call successors, (73) [2024-11-28 02:46:35,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 648 transitions. [2024-11-28 02:46:35,748 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 648 transitions. Word has length 75 [2024-11-28 02:46:35,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:46:35,748 INFO L471 AbstractCegarLoop]: Abstraction has 550 states and 648 transitions. [2024-11-28 02:46:35,748 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 56 states have (on average 2.4285714285714284) internal successors, (136), 57 states have internal predecessors, (136), 16 states have call successors, (19), 10 states have call predecessors, (19), 2 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-28 02:46:35,749 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 648 transitions. [2024-11-28 02:46:35,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-11-28 02:46:35,750 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:46:35,750 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:46:35,762 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-28 02:46:35,950 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2024-11-28 02:46:35,951 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-28 02:46:35,951 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:46:35,951 INFO L85 PathProgramCache]: Analyzing trace with hash -570680727, now seen corresponding path program 1 times [2024-11-28 02:46:35,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:46:35,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064614073] [2024-11-28 02:46:35,951 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:46:35,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:46:35,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:46:36,170 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-28 02:46:36,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:46:36,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064614073] [2024-11-28 02:46:36,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064614073] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:46:36,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6503554] [2024-11-28 02:46:36,171 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:46:36,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:46:36,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:46:36,173 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:46:36,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-28 02:46:36,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:46:36,352 INFO L256 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-28 02:46:36,354 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:46:36,492 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-28 02:46:36,492 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:46:36,632 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-28 02:46:36,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6503554] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:46:36,634 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:46:36,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 15 [2024-11-28 02:46:36,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756053835] [2024-11-28 02:46:36,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:46:36,635 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-28 02:46:36,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:46:36,635 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-28 02:46:36,635 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2024-11-28 02:46:36,636 INFO L87 Difference]: Start difference. First operand 550 states and 648 transitions. Second operand has 15 states, 15 states have (on average 6.133333333333334) internal successors, (92), 15 states have internal predecessors, (92), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-28 02:46:36,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:46:36,824 INFO L93 Difference]: Finished difference Result 554 states and 652 transitions. [2024-11-28 02:46:36,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 02:46:36,824 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.133333333333334) internal successors, (92), 15 states have internal predecessors, (92), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 77 [2024-11-28 02:46:36,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:46:36,827 INFO L225 Difference]: With dead ends: 554 [2024-11-28 02:46:36,827 INFO L226 Difference]: Without dead ends: 554 [2024-11-28 02:46:36,827 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 145 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2024-11-28 02:46:36,828 INFO L435 NwaCegarLoop]: 80 mSDtfsCounter, 3 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 688 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 02:46:36,829 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 688 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 02:46:36,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2024-11-28 02:46:36,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 554. [2024-11-28 02:46:36,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 434 states have (on average 1.1658986175115207) internal successors, (506), 446 states have internal predecessors, (506), 73 states have call successors, (73), 36 states have call predecessors, (73), 36 states have return successors, (73), 71 states have call predecessors, (73), 73 states have call successors, (73) [2024-11-28 02:46:36,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 652 transitions. [2024-11-28 02:46:36,846 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 652 transitions. Word has length 77 [2024-11-28 02:46:36,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:46:36,847 INFO L471 AbstractCegarLoop]: Abstraction has 554 states and 652 transitions. [2024-11-28 02:46:36,847 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.133333333333334) internal successors, (92), 15 states have internal predecessors, (92), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-28 02:46:36,847 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 652 transitions. [2024-11-28 02:46:36,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-11-28 02:46:36,848 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:46:36,849 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:46:36,861 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-11-28 02:46:37,053 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-11-28 02:46:37,053 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-28 02:46:37,053 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:46:37,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1331718588, now seen corresponding path program 1 times [2024-11-28 02:46:37,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:46:37,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782284438] [2024-11-28 02:46:37,053 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:46:37,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:46:37,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:46:37,146 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-28 02:46:37,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:46:37,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782284438] [2024-11-28 02:46:37,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782284438] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:46:37,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:46:37,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 02:46:37,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466752690] [2024-11-28 02:46:37,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:46:37,147 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 02:46:37,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:46:37,148 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 02:46:37,148 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 02:46:37,148 INFO L87 Difference]: Start difference. First operand 554 states and 652 transitions. Second operand has 4 states, 3 states have (on average 17.0) internal successors, (51), 4 states have internal predecessors, (51), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-28 02:46:37,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:46:37,196 INFO L93 Difference]: Finished difference Result 553 states and 651 transitions. [2024-11-28 02:46:37,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 02:46:37,196 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 17.0) internal successors, (51), 4 states have internal predecessors, (51), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 79 [2024-11-28 02:46:37,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:46:37,199 INFO L225 Difference]: With dead ends: 553 [2024-11-28 02:46:37,199 INFO L226 Difference]: Without dead ends: 553 [2024-11-28 02:46:37,199 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 02:46:37,199 INFO L435 NwaCegarLoop]: 84 mSDtfsCounter, 5 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 02:46:37,199 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 207 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 02:46:37,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2024-11-28 02:46:37,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 553. [2024-11-28 02:46:37,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 434 states have (on average 1.163594470046083) internal successors, (505), 445 states have internal predecessors, (505), 73 states have call successors, (73), 36 states have call predecessors, (73), 36 states have return successors, (73), 71 states have call predecessors, (73), 73 states have call successors, (73) [2024-11-28 02:46:37,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 651 transitions. [2024-11-28 02:46:37,213 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 651 transitions. Word has length 79 [2024-11-28 02:46:37,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:46:37,214 INFO L471 AbstractCegarLoop]: Abstraction has 553 states and 651 transitions. [2024-11-28 02:46:37,214 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 17.0) internal successors, (51), 4 states have internal predecessors, (51), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-28 02:46:37,214 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 651 transitions. [2024-11-28 02:46:37,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-11-28 02:46:37,215 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:46:37,215 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:46:37,215 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-11-28 02:46:37,215 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting upsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-28 02:46:37,216 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:46:37,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1234204075, now seen corresponding path program 2 times [2024-11-28 02:46:37,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:46:37,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411305190] [2024-11-28 02:46:37,216 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:46:37,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:46:37,245 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:46:37,245 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:46:38,597 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 73 proven. 64 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-28 02:46:38,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:46:38,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411305190] [2024-11-28 02:46:38,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411305190] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:46:38,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125966329] [2024-11-28 02:46:38,597 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:46:38,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:46:38,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:46:38,599 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:46:38,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-28 02:46:38,773 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:46:38,773 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:46:38,776 INFO L256 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 84 conjuncts are in the unsatisfiable core [2024-11-28 02:46:38,778 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:46:40,559 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 3 proven. 133 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-28 02:46:40,559 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:46:41,961 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 71 treesize of output 67 [2024-11-28 02:46:43,088 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 3 proven. 131 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-28 02:46:43,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125966329] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:46:43,088 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:46:43,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 27, 23] total 77 [2024-11-28 02:46:43,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188532889] [2024-11-28 02:46:43,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:46:43,089 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2024-11-28 02:46:43,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:46:43,090 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2024-11-28 02:46:43,090 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=579, Invalid=5427, Unknown=0, NotChecked=0, Total=6006 [2024-11-28 02:46:43,091 INFO L87 Difference]: Start difference. First operand 553 states and 651 transitions. Second operand has 78 states, 68 states have (on average 2.6323529411764706) internal successors, (179), 68 states have internal predecessors, (179), 19 states have call successors, (22), 11 states have call predecessors, (22), 4 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2024-11-28 02:46:57,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:46:57,463 INFO L93 Difference]: Finished difference Result 794 states and 930 transitions. [2024-11-28 02:46:57,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2024-11-28 02:46:57,464 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 68 states have (on average 2.6323529411764706) internal successors, (179), 68 states have internal predecessors, (179), 19 states have call successors, (22), 11 states have call predecessors, (22), 4 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) Word has length 83 [2024-11-28 02:46:57,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:46:57,467 INFO L225 Difference]: With dead ends: 794 [2024-11-28 02:46:57,467 INFO L226 Difference]: Without dead ends: 794 [2024-11-28 02:46:57,470 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8650 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=2854, Invalid=26902, Unknown=0, NotChecked=0, Total=29756 [2024-11-28 02:46:57,470 INFO L435 NwaCegarLoop]: 120 mSDtfsCounter, 457 mSDsluCounter, 3416 mSDsCounter, 0 mSdLazyCounter, 5367 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 457 SdHoareTripleChecker+Valid, 3536 SdHoareTripleChecker+Invalid, 5603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 5367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2024-11-28 02:46:57,471 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [457 Valid, 3536 Invalid, 5603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 5367 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2024-11-28 02:46:57,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2024-11-28 02:46:57,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 643. [2024-11-28 02:46:57,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 500 states have (on average 1.17) internal successors, (585), 511 states have internal predecessors, (585), 89 states have call successors, (89), 44 states have call predecessors, (89), 44 states have return successors, (89), 87 states have call predecessors, (89), 89 states have call successors, (89) [2024-11-28 02:46:57,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 763 transitions. [2024-11-28 02:46:57,489 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 763 transitions. Word has length 83 [2024-11-28 02:46:57,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:46:57,489 INFO L471 AbstractCegarLoop]: Abstraction has 643 states and 763 transitions. [2024-11-28 02:46:57,490 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 68 states have (on average 2.6323529411764706) internal successors, (179), 68 states have internal predecessors, (179), 19 states have call successors, (22), 11 states have call predecessors, (22), 4 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2024-11-28 02:46:57,490 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 763 transitions. [2024-11-28 02:46:57,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-11-28 02:46:57,491 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:46:57,491 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:46:57,502 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-28 02:46:57,692 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-11-28 02:46:57,692 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting upsweepErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-28 02:46:57,692 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:46:57,692 INFO L85 PathProgramCache]: Analyzing trace with hash 2036165, now seen corresponding path program 3 times [2024-11-28 02:46:57,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:46:57,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601614733] [2024-11-28 02:46:57,693 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:46:57,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:46:57,750 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-28 02:46:57,751 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:46:59,302 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 33 proven. 25 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2024-11-28 02:46:59,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:46:59,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601614733] [2024-11-28 02:46:59,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601614733] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:46:59,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719436863] [2024-11-28 02:46:59,303 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:46:59,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:46:59,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:46:59,305 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:46:59,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-28 02:46:59,531 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-28 02:46:59,532 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:46:59,534 INFO L256 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-11-28 02:46:59,536 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:47:00,121 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 [2024-11-28 02:47:01,524 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 19 treesize of output 15 [2024-11-28 02:47:03,058 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 31 proven. 28 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2024-11-28 02:47:03,062 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:47:04,794 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 37 proven. 19 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2024-11-28 02:47:04,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719436863] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:47:04,794 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:47:04,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24, 23] total 61 [2024-11-28 02:47:04,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343997441] [2024-11-28 02:47:04,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:47:04,795 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2024-11-28 02:47:04,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:47:04,796 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2024-11-28 02:47:04,796 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=388, Invalid=3272, Unknown=0, NotChecked=0, Total=3660 [2024-11-28 02:47:04,796 INFO L87 Difference]: Start difference. First operand 643 states and 763 transitions. Second operand has 61 states, 52 states have (on average 1.6730769230769231) internal successors, (87), 55 states have internal predecessors, (87), 17 states have call successors, (19), 8 states have call predecessors, (19), 3 states have return successors, (11), 8 states have call predecessors, (11), 10 states have call successors, (11) [2024-11-28 02:47:09,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:47:09,332 INFO L93 Difference]: Finished difference Result 294 states and 315 transitions. [2024-11-28 02:47:09,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-28 02:47:09,332 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 52 states have (on average 1.6730769230769231) internal successors, (87), 55 states have internal predecessors, (87), 17 states have call successors, (19), 8 states have call predecessors, (19), 3 states have return successors, (11), 8 states have call predecessors, (11), 10 states have call successors, (11) Word has length 87 [2024-11-28 02:47:09,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:47:09,333 INFO L225 Difference]: With dead ends: 294 [2024-11-28 02:47:09,334 INFO L226 Difference]: Without dead ends: 154 [2024-11-28 02:47:09,334 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 139 SyntacticMatches, 2 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2343 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=958, Invalid=8162, Unknown=0, NotChecked=0, Total=9120 [2024-11-28 02:47:09,335 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 200 mSDsluCounter, 865 mSDsCounter, 0 mSdLazyCounter, 1301 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 900 SdHoareTripleChecker+Invalid, 1360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-28 02:47:09,335 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 900 Invalid, 1360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1301 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-28 02:47:09,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2024-11-28 02:47:09,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 84. [2024-11-28 02:47:09,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 71 states have (on average 1.056338028169014) internal successors, (75), 73 states have internal predecessors, (75), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-28 02:47:09,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 87 transitions. [2024-11-28 02:47:09,338 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 87 transitions. Word has length 87 [2024-11-28 02:47:09,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:47:09,339 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 87 transitions. [2024-11-28 02:47:09,339 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 52 states have (on average 1.6730769230769231) internal successors, (87), 55 states have internal predecessors, (87), 17 states have call successors, (19), 8 states have call predecessors, (19), 3 states have return successors, (11), 8 states have call predecessors, (11), 10 states have call successors, (11) [2024-11-28 02:47:09,339 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 87 transitions. [2024-11-28 02:47:09,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-11-28 02:47:09,340 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:47:09,340 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:47:09,351 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-28 02:47:09,540 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:47:09,541 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-28 02:47:09,541 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:47:09,541 INFO L85 PathProgramCache]: Analyzing trace with hash 615716790, now seen corresponding path program 1 times [2024-11-28 02:47:09,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:47:09,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639463775] [2024-11-28 02:47:09,541 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:47:09,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:47:09,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:47:09,607 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-28 02:47:09,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:47:09,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639463775] [2024-11-28 02:47:09,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639463775] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:47:09,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:47:09,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 02:47:09,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048812331] [2024-11-28 02:47:09,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:47:09,609 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 02:47:09,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:47:09,610 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 02:47:09,610 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 02:47:09,610 INFO L87 Difference]: Start difference. First operand 84 states and 87 transitions. Second operand has 4 states, 3 states have (on average 18.0) internal successors, (54), 4 states have internal predecessors, (54), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-28 02:47:09,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:47:09,649 INFO L93 Difference]: Finished difference Result 83 states and 86 transitions. [2024-11-28 02:47:09,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 02:47:09,650 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 18.0) internal successors, (54), 4 states have internal predecessors, (54), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 82 [2024-11-28 02:47:09,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:47:09,651 INFO L225 Difference]: With dead ends: 83 [2024-11-28 02:47:09,651 INFO L226 Difference]: Without dead ends: 83 [2024-11-28 02:47:09,651 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 02:47:09,651 INFO L435 NwaCegarLoop]: 62 mSDtfsCounter, 1 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 02:47:09,652 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 149 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 02:47:09,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2024-11-28 02:47:09,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2024-11-28 02:47:09,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 71 states have (on average 1.0422535211267605) internal successors, (74), 72 states have internal predecessors, (74), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-28 02:47:09,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 86 transitions. [2024-11-28 02:47:09,654 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 86 transitions. Word has length 82 [2024-11-28 02:47:09,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:47:09,655 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 86 transitions. [2024-11-28 02:47:09,655 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 18.0) internal successors, (54), 4 states have internal predecessors, (54), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-28 02:47:09,655 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 86 transitions. [2024-11-28 02:47:09,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-11-28 02:47:09,656 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:47:09,657 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:47:09,657 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-11-28 02:47:09,658 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-28 02:47:09,658 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:47:09,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1907351488, now seen corresponding path program 1 times [2024-11-28 02:47:09,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:47:09,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853003835] [2024-11-28 02:47:09,658 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:47:09,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:47:09,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:47:09,789 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-28 02:47:09,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:47:09,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853003835] [2024-11-28 02:47:09,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853003835] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:47:09,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:47:09,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 02:47:09,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068525634] [2024-11-28 02:47:09,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:47:09,790 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 02:47:09,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:47:09,790 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 02:47:09,790 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-28 02:47:09,790 INFO L87 Difference]: Start difference. First operand 83 states and 86 transitions. Second operand has 6 states, 5 states have (on average 11.0) internal successors, (55), 6 states have internal predecessors, (55), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-28 02:47:09,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:47:09,864 INFO L93 Difference]: Finished difference Result 82 states and 85 transitions. [2024-11-28 02:47:09,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 02:47:09,864 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 11.0) internal successors, (55), 6 states have internal predecessors, (55), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 83 [2024-11-28 02:47:09,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:47:09,865 INFO L225 Difference]: With dead ends: 82 [2024-11-28 02:47:09,865 INFO L226 Difference]: Without dead ends: 82 [2024-11-28 02:47:09,865 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-28 02:47:09,865 INFO L435 NwaCegarLoop]: 56 mSDtfsCounter, 0 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:47:09,865 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 153 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:47:09,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-11-28 02:47:09,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2024-11-28 02:47:09,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 71 states have (on average 1.028169014084507) internal successors, (73), 71 states have internal predecessors, (73), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-28 02:47:09,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 85 transitions. [2024-11-28 02:47:09,867 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 85 transitions. Word has length 83 [2024-11-28 02:47:09,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:47:09,867 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 85 transitions. [2024-11-28 02:47:09,867 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 11.0) internal successors, (55), 6 states have internal predecessors, (55), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-28 02:47:09,867 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 85 transitions. [2024-11-28 02:47:09,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2024-11-28 02:47:09,867 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:47:09,867 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:47:09,867 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-11-28 02:47:09,868 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-28 02:47:09,868 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:47:09,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1001645831, now seen corresponding path program 1 times [2024-11-28 02:47:09,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:47:09,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173540901] [2024-11-28 02:47:09,868 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:47:09,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:47:09,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:47:10,186 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-28 02:47:10,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:47:10,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173540901] [2024-11-28 02:47:10,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173540901] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:47:10,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:47:10,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 02:47:10,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104306455] [2024-11-28 02:47:10,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:47:10,187 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 02:47:10,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:47:10,187 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 02:47:10,187 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-28 02:47:10,187 INFO L87 Difference]: Start difference. First operand 82 states and 85 transitions. Second operand has 7 states, 6 states have (on average 9.333333333333334) internal successors, (56), 7 states have internal predecessors, (56), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-28 02:47:10,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:47:10,315 INFO L93 Difference]: Finished difference Result 81 states and 84 transitions. [2024-11-28 02:47:10,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 02:47:10,316 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 9.333333333333334) internal successors, (56), 7 states have internal predecessors, (56), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 84 [2024-11-28 02:47:10,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:47:10,316 INFO L225 Difference]: With dead ends: 81 [2024-11-28 02:47:10,316 INFO L226 Difference]: Without dead ends: 0 [2024-11-28 02:47:10,317 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-28 02:47:10,317 INFO L435 NwaCegarLoop]: 54 mSDtfsCounter, 0 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:47:10,317 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 196 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:47:10,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-11-28 02:47:10,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-11-28 02:47:10,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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) [2024-11-28 02:47:10,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-11-28 02:47:10,318 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 84 [2024-11-28 02:47:10,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:47:10,318 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-11-28 02:47:10,319 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 9.333333333333334) internal successors, (56), 7 states have internal predecessors, (56), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-28 02:47:10,319 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-11-28 02:47:10,319 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-11-28 02:47:10,322 INFO L782 garLoopResultBuilder]: Registering result SAFE for location downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 34 remaining) [2024-11-28 02:47:10,322 INFO L782 garLoopResultBuilder]: Registering result SAFE for location downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 34 remaining) [2024-11-28 02:47:10,323 INFO L782 garLoopResultBuilder]: Registering result SAFE for location downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 34 remaining) [2024-11-28 02:47:10,323 INFO L782 garLoopResultBuilder]: Registering result SAFE for location downsweepErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 34 remaining) [2024-11-28 02:47:10,323 INFO L782 garLoopResultBuilder]: Registering result SAFE for location downsweepErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 34 remaining) [2024-11-28 02:47:10,323 INFO L782 garLoopResultBuilder]: Registering result SAFE for location downsweepErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 34 remaining) [2024-11-28 02:47:10,323 INFO L782 garLoopResultBuilder]: Registering result SAFE for location downsweepErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 34 remaining) [2024-11-28 02:47:10,323 INFO L782 garLoopResultBuilder]: Registering result SAFE for location downsweepErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 34 remaining) [2024-11-28 02:47:10,323 INFO L782 garLoopResultBuilder]: Registering result SAFE for location downsweepErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 34 remaining) [2024-11-28 02:47:10,323 INFO L782 garLoopResultBuilder]: Registering result SAFE for location downsweepErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 34 remaining) [2024-11-28 02:47:10,324 INFO L782 garLoopResultBuilder]: Registering result SAFE for location upsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 34 remaining) [2024-11-28 02:47:10,324 INFO L782 garLoopResultBuilder]: Registering result SAFE for location upsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 34 remaining) [2024-11-28 02:47:10,324 INFO L782 garLoopResultBuilder]: Registering result SAFE for location upsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 34 remaining) [2024-11-28 02:47:10,324 INFO L782 garLoopResultBuilder]: Registering result SAFE for location upsweepErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 34 remaining) [2024-11-28 02:47:10,324 INFO L782 garLoopResultBuilder]: Registering result SAFE for location upsweepErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 34 remaining) [2024-11-28 02:47:10,324 INFO L782 garLoopResultBuilder]: Registering result SAFE for location upsweepErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 34 remaining) [2024-11-28 02:47:10,324 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 34 remaining) [2024-11-28 02:47:10,324 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 34 remaining) [2024-11-28 02:47:10,325 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 34 remaining) [2024-11-28 02:47:10,325 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 34 remaining) [2024-11-28 02:47:10,325 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 34 remaining) [2024-11-28 02:47:10,325 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 34 remaining) [2024-11-28 02:47:10,325 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 34 remaining) [2024-11-28 02:47:10,325 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 34 remaining) [2024-11-28 02:47:10,325 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (9 of 34 remaining) [2024-11-28 02:47:10,325 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 34 remaining) [2024-11-28 02:47:10,325 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 34 remaining) [2024-11-28 02:47:10,325 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE (6 of 34 remaining) [2024-11-28 02:47:10,325 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE (5 of 34 remaining) [2024-11-28 02:47:10,325 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE (4 of 34 remaining) [2024-11-28 02:47:10,325 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE (3 of 34 remaining) [2024-11-28 02:47:10,325 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE (2 of 34 remaining) [2024-11-28 02:47:10,325 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE (1 of 34 remaining) [2024-11-28 02:47:10,326 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK (0 of 34 remaining) [2024-11-28 02:47:10,326 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-11-28 02:47:10,330 INFO L422 BasicCegarLoop]: Path program histogram: [6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:47:10,332 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-28 02:47:10,336 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 02:47:10 BoogieIcfgContainer [2024-11-28 02:47:10,336 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-28 02:47:10,337 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-28 02:47:10,337 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-28 02:47:10,338 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-28 02:47:10,339 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:44:41" (3/4) ... [2024-11-28 02:47:10,341 INFO L146 WitnessPrinter]: Generating witness for correct program [2024-11-28 02:47:10,348 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure upsweep [2024-11-28 02:47:10,349 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2024-11-28 02:47:10,349 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure #Ultimate.meminit [2024-11-28 02:47:10,349 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure downsweep [2024-11-28 02:47:10,354 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 23 nodes and edges [2024-11-28 02:47:10,357 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2024-11-28 02:47:10,357 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2024-11-28 02:47:10,358 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-11-28 02:47:10,469 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/witness.graphml [2024-11-28 02:47:10,470 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/witness.yml [2024-11-28 02:47:10,470 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-28 02:47:10,472 INFO L158 Benchmark]: Toolchain (without parser) took 150123.19ms. Allocated memory was 142.6MB in the beginning and 394.3MB in the end (delta: 251.7MB). Free memory was 117.3MB in the beginning and 287.1MB in the end (delta: -169.8MB). Peak memory consumption was 81.6MB. Max. memory is 16.1GB. [2024-11-28 02:47:10,472 INFO L158 Benchmark]: CDTParser took 0.39ms. Allocated memory is still 117.4MB. Free memory is still 74.4MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 02:47:10,473 INFO L158 Benchmark]: CACSL2BoogieTranslator took 363.53ms. Allocated memory is still 142.6MB. Free memory was 117.1MB in the beginning and 104.9MB in the end (delta: 12.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-28 02:47:10,473 INFO L158 Benchmark]: Boogie Procedure Inliner took 50.32ms. Allocated memory is still 142.6MB. Free memory was 104.9MB in the beginning and 103.4MB in the end (delta: 1.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-28 02:47:10,473 INFO L158 Benchmark]: Boogie Preprocessor took 64.48ms. Allocated memory is still 142.6MB. Free memory was 103.4MB in the beginning and 101.5MB in the end (delta: 1.9MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 02:47:10,474 INFO L158 Benchmark]: RCFGBuilder took 683.10ms. Allocated memory is still 142.6MB. Free memory was 101.5MB in the beginning and 79.6MB in the end (delta: 21.9MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-28 02:47:10,474 INFO L158 Benchmark]: TraceAbstraction took 148820.87ms. Allocated memory was 142.6MB in the beginning and 394.3MB in the end (delta: 251.7MB). Free memory was 79.0MB in the beginning and 291.4MB in the end (delta: -212.3MB). Peak memory consumption was 39.6MB. Max. memory is 16.1GB. [2024-11-28 02:47:10,474 INFO L158 Benchmark]: Witness Printer took 132.83ms. Allocated memory is still 394.3MB. Free memory was 291.4MB in the beginning and 287.1MB in the end (delta: 4.3MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 02:47:10,479 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.39ms. Allocated memory is still 117.4MB. Free memory is still 74.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 363.53ms. Allocated memory is still 142.6MB. Free memory was 117.1MB in the beginning and 104.9MB in the end (delta: 12.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 50.32ms. Allocated memory is still 142.6MB. Free memory was 104.9MB in the beginning and 103.4MB in the end (delta: 1.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 64.48ms. Allocated memory is still 142.6MB. Free memory was 103.4MB in the beginning and 101.5MB in the end (delta: 1.9MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 683.10ms. Allocated memory is still 142.6MB. Free memory was 101.5MB in the beginning and 79.6MB in the end (delta: 21.9MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 148820.87ms. Allocated memory was 142.6MB in the beginning and 394.3MB in the end (delta: 251.7MB). Free memory was 79.0MB in the beginning and 291.4MB in the end (delta: -212.3MB). Peak memory consumption was 39.6MB. Max. memory is 16.1GB. * Witness Printer took 132.83ms. Allocated memory is still 394.3MB. Free memory was 291.4MB in the beginning and 287.1MB in the end (delta: 4.3MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 11]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 68]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 68]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 68]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 69]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 69]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 69]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 51]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 107 locations, 34 error locations. Started 1 CEGAR loops. OverallTime: 148.7s, OverallIterations: 39, TraceHistogramMax: 8, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.1s, AutomataDifference: 69.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 4095 SdHoareTripleChecker+Valid, 29.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4039 mSDsluCounter, 33554 SdHoareTripleChecker+Invalid, 25.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 30473 mSDsCounter, 1280 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 33395 IncrementalHoareTripleChecker+Invalid, 34675 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1280 mSolverCounterUnsat, 3081 mSDtfsCounter, 33395 mSolverCounterSat, 0.3s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3952 GetRequests, 2390 SyntacticMatches, 42 SemanticMatches, 1520 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33660 ImplicationChecksByTransitivity, 72.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=643occurred in iteration=35, InterpolantAutomatonStates: 836, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 39 MinimizatonAttempts, 850 StatesRemovedByMinimization, 26 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 2.8s SatisfiabilityAnalysisTime, 66.8s InterpolantComputationTime, 3765 NumberOfCodeBlocks, 3655 NumberOfCodeBlocksAsserted, 108 NumberOfCheckSat, 5023 ConstructedInterpolants, 67 QuantifiedInterpolants, 46292 SizeOfPredicates, 219 NumberOfNonLiveVariables, 6633 ConjunctsInSsa, 989 ConjunctsInUnsatCore, 88 InterpolantComputations, 13 PerfectInterpolantSequences, 1976/3597 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 34 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-11-28 02:47:10,515 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc497444-3a67-4da3-b99a-e0adb76779de/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE