./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-broom/sll-shared-sll.i --full-output --architecture 64bit -------------------------------------------------------------------------------- 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_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/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_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-broom/sll-shared-sll.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/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 64bit --witnessprinter.graph.data.programhash 2fa49e67cf70129223df227686710f59267eaca2c9c0899d0fe3cafabfccfe68 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 05:00:56,293 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 05:00:56,386 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2024-11-28 05:00:56,392 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 05:00:56,394 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 05:00:56,428 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 05:00:56,429 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 05:00:56,429 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 05:00:56,429 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 05:00:56,430 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 05:00:56,430 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 05:00:56,430 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 05:00:56,430 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 05:00:56,430 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 05:00:56,431 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 05:00:56,431 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 05:00:56,431 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 05:00:56,431 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 05:00:56,431 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-28 05:00:56,431 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-28 05:00:56,431 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-28 05:00:56,431 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 05:00:56,431 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-28 05:00:56,433 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-28 05:00:56,433 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 05:00:56,434 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 05:00:56,434 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 05:00:56,434 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 05:00:56,434 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 05:00:56,434 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 05:00:56,434 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 05:00:56,434 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 05:00:56,434 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 05:00:56,434 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 05:00:56,434 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 05:00:56,435 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 05:00:56,435 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 05:00:56,435 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 05:00:56,435 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 05:00:56,435 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 05:00:56,435 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 05:00:56,435 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 05:00:56,435 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 05:00:56,435 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 05:00:56,435 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_870a2ffb-a013-4892-8e0a-478dabdcc7b8/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 -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2fa49e67cf70129223df227686710f59267eaca2c9c0899d0fe3cafabfccfe68 [2024-11-28 05:00:56,748 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 05:00:56,756 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 05:00:56,759 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 05:00:56,760 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 05:00:56,760 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 05:00:56,761 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/memsafety-broom/sll-shared-sll.i [2024-11-28 05:00:59,704 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/data/2d74ed5d9/e37d31da346f4243b6a018208bca6b95/FLAG4a415087b [2024-11-28 05:01:00,079 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 05:01:00,079 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/sv-benchmarks/c/memsafety-broom/sll-shared-sll.i [2024-11-28 05:01:00,116 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/data/2d74ed5d9/e37d31da346f4243b6a018208bca6b95/FLAG4a415087b [2024-11-28 05:01:00,265 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/data/2d74ed5d9/e37d31da346f4243b6a018208bca6b95 [2024-11-28 05:01:00,267 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 05:01:00,268 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 05:01:00,270 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 05:01:00,270 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 05:01:00,274 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 05:01:00,275 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:01:00" (1/1) ... [2024-11-28 05:01:00,276 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55814b71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:01:00, skipping insertion in model container [2024-11-28 05:01:00,277 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:01:00" (1/1) ... [2024-11-28 05:01:00,331 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 05:01:00,634 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 05:01:00,643 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 05:01:00,702 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 05:01:00,735 INFO L204 MainTranslator]: Completed translation [2024-11-28 05:01:00,736 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:01:00 WrapperNode [2024-11-28 05:01:00,737 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 05:01:00,738 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 05:01:00,738 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 05:01:00,738 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 05:01:00,745 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:01:00" (1/1) ... [2024-11-28 05:01:00,767 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:01:00" (1/1) ... [2024-11-28 05:01:00,795 INFO L138 Inliner]: procedures = 121, calls = 29, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 92 [2024-11-28 05:01:00,795 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 05:01:00,796 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 05:01:00,796 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 05:01:00,796 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 05:01:00,807 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:01:00" (1/1) ... [2024-11-28 05:01:00,808 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:01:00" (1/1) ... [2024-11-28 05:01:00,812 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:01:00" (1/1) ... [2024-11-28 05:01:00,845 INFO L175 MemorySlicer]: Split 14 memory accesses to 1 slices as follows [14]. 100 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0]. The 7 writes are split as follows [7]. [2024-11-28 05:01:00,847 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:01:00" (1/1) ... [2024-11-28 05:01:00,848 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:01:00" (1/1) ... [2024-11-28 05:01:00,862 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:01:00" (1/1) ... [2024-11-28 05:01:00,863 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:01:00" (1/1) ... [2024-11-28 05:01:00,867 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:01:00" (1/1) ... [2024-11-28 05:01:00,868 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:01:00" (1/1) ... [2024-11-28 05:01:00,869 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:01:00" (1/1) ... [2024-11-28 05:01:00,871 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 05:01:00,875 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 05:01:00,875 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 05:01:00,875 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 05:01:00,876 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:01:00" (1/1) ... [2024-11-28 05:01:00,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 05:01:00,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:01:00,914 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 05:01:00,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 05:01:00,954 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_and_zero_internal [2024-11-28 05:01:00,954 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_and_zero_internal [2024-11-28 05:01:00,954 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_and_zero [2024-11-28 05:01:00,954 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_and_zero [2024-11-28 05:01:00,954 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-28 05:01:00,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-28 05:01:00,954 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-28 05:01:00,954 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-28 05:01:00,954 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 05:01:00,954 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 05:01:01,108 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 05:01:01,110 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 05:01:01,503 INFO L? ?]: Removed 94 outVars from TransFormulas that were not future-live. [2024-11-28 05:01:01,503 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 05:01:01,522 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 05:01:01,524 INFO L312 CfgBuilder]: Removed 5 assume(true) statements. [2024-11-28 05:01:01,524 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:01:01 BoogieIcfgContainer [2024-11-28 05:01:01,525 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 05:01:01,527 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 05:01:01,528 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 05:01:01,534 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 05:01:01,535 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 05:01:00" (1/3) ... [2024-11-28 05:01:01,538 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@255b3e1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:01:01, skipping insertion in model container [2024-11-28 05:01:01,539 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:01:00" (2/3) ... [2024-11-28 05:01:01,539 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@255b3e1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:01:01, skipping insertion in model container [2024-11-28 05:01:01,539 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:01:01" (3/3) ... [2024-11-28 05:01:01,540 INFO L128 eAbstractionObserver]: Analyzing ICFG sll-shared-sll.i [2024-11-28 05:01:01,557 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 05:01:01,560 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG sll-shared-sll.i that has 3 procedures, 98 locations, 1 initial locations, 5 loop locations, and 35 error locations. [2024-11-28 05:01:01,615 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 05:01:01,634 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;@2429f9c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 05:01:01,634 INFO L334 AbstractCegarLoop]: Starting to check reachability of 35 error locations. [2024-11-28 05:01:01,639 INFO L276 IsEmpty]: Start isEmpty. Operand has 98 states, 56 states have (on average 1.8214285714285714) internal successors, (102), 91 states have internal predecessors, (102), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-28 05:01:01,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-11-28 05:01:01,647 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:01:01,647 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-11-28 05:01:01,648 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-28 05:01:01,655 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:01:01,656 INFO L85 PathProgramCache]: Analyzing trace with hash 37420381, now seen corresponding path program 1 times [2024-11-28 05:01:01,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:01:01,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291337728] [2024-11-28 05:01:01,665 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:01:01,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:01:01,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:01:01,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:01:01,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:01:01,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291337728] [2024-11-28 05:01:01,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291337728] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:01:01,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:01:01,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 05:01:01,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558262665] [2024-11-28 05:01:01,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:01:01,947 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 05:01:01,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:01:01,969 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 05:01:01,970 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 05:01:01,972 INFO L87 Difference]: Start difference. First operand has 98 states, 56 states have (on average 1.8214285714285714) internal successors, (102), 91 states have internal predecessors, (102), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:01:02,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:01:02,117 INFO L93 Difference]: Finished difference Result 96 states and 103 transitions. [2024-11-28 05:01:02,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 05:01:02,122 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2024-11-28 05:01:02,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:01:02,129 INFO L225 Difference]: With dead ends: 96 [2024-11-28 05:01:02,129 INFO L226 Difference]: Without dead ends: 94 [2024-11-28 05:01:02,131 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 05:01:02,134 INFO L435 NwaCegarLoop]: 98 mSDtfsCounter, 2 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 05:01:02,134 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 162 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 05:01:02,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2024-11-28 05:01:02,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2024-11-28 05:01:02,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 55 states have (on average 1.690909090909091) internal successors, (93), 87 states have internal predecessors, (93), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-28 05:01:02,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 101 transitions. [2024-11-28 05:01:02,189 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 101 transitions. Word has length 5 [2024-11-28 05:01:02,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:01:02,190 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 101 transitions. [2024-11-28 05:01:02,191 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:01:02,191 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 101 transitions. [2024-11-28 05:01:02,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-11-28 05:01:02,191 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:01:02,192 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-11-28 05:01:02,192 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-28 05:01:02,192 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-28 05:01:02,194 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:01:02,194 INFO L85 PathProgramCache]: Analyzing trace with hash 37420382, now seen corresponding path program 1 times [2024-11-28 05:01:02,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:01:02,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587027146] [2024-11-28 05:01:02,194 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:01:02,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:01:02,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:01:02,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:01:02,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:01:02,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587027146] [2024-11-28 05:01:02,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587027146] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:01:02,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:01:02,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 05:01:02,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530830045] [2024-11-28 05:01:02,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:01:02,368 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 05:01:02,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:01:02,369 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 05:01:02,369 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 05:01:02,369 INFO L87 Difference]: Start difference. First operand 94 states and 101 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:01:02,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:01:02,471 INFO L93 Difference]: Finished difference Result 92 states and 99 transitions. [2024-11-28 05:01:02,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 05:01:02,472 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2024-11-28 05:01:02,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:01:02,472 INFO L225 Difference]: With dead ends: 92 [2024-11-28 05:01:02,473 INFO L226 Difference]: Without dead ends: 92 [2024-11-28 05:01:02,473 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 05:01:02,474 INFO L435 NwaCegarLoop]: 96 mSDtfsCounter, 2 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 05:01:02,474 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 166 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 05:01:02,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-11-28 05:01:02,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2024-11-28 05:01:02,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 55 states have (on average 1.6545454545454545) internal successors, (91), 85 states have internal predecessors, (91), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-28 05:01:02,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 99 transitions. [2024-11-28 05:01:02,486 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 99 transitions. Word has length 5 [2024-11-28 05:01:02,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:01:02,486 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 99 transitions. [2024-11-28 05:01:02,487 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:01:02,487 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 99 transitions. [2024-11-28 05:01:02,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-28 05:01:02,487 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:01:02,488 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:01:02,488 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-28 05:01:02,488 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting alloc_and_zero_internalErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-28 05:01:02,488 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:01:02,489 INFO L85 PathProgramCache]: Analyzing trace with hash 986048043, now seen corresponding path program 1 times [2024-11-28 05:01:02,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:01:02,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759024308] [2024-11-28 05:01:02,489 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:01:02,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:01:02,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:01:02,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:01:02,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:01:02,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759024308] [2024-11-28 05:01:02,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759024308] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:01:02,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:01:02,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 05:01:02,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880652959] [2024-11-28 05:01:02,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:01:02,581 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 05:01:02,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:01:02,582 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 05:01:02,582 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 05:01:02,582 INFO L87 Difference]: Start difference. First operand 92 states and 99 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-28 05:01:02,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:01:02,665 INFO L93 Difference]: Finished difference Result 91 states and 98 transitions. [2024-11-28 05:01:02,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 05:01:02,668 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2024-11-28 05:01:02,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:01:02,669 INFO L225 Difference]: With dead ends: 91 [2024-11-28 05:01:02,669 INFO L226 Difference]: Without dead ends: 91 [2024-11-28 05:01:02,669 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 05:01:02,670 INFO L435 NwaCegarLoop]: 95 mSDtfsCounter, 1 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 05:01:02,670 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 157 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 05:01:02,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2024-11-28 05:01:02,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2024-11-28 05:01:02,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 55 states have (on average 1.6363636363636365) internal successors, (90), 84 states have internal predecessors, (90), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-28 05:01:02,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 98 transitions. [2024-11-28 05:01:02,685 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 98 transitions. Word has length 13 [2024-11-28 05:01:02,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:01:02,687 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 98 transitions. [2024-11-28 05:01:02,687 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-28 05:01:02,687 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 98 transitions. [2024-11-28 05:01:02,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-28 05:01:02,687 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:01:02,688 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:01:02,689 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-28 05:01:02,689 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting alloc_and_zero_internalErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-28 05:01:02,689 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:01:02,689 INFO L85 PathProgramCache]: Analyzing trace with hash 986048044, now seen corresponding path program 1 times [2024-11-28 05:01:02,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:01:02,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152342992] [2024-11-28 05:01:02,691 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:01:02,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:01:02,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:01:02,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:01:02,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:01:02,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152342992] [2024-11-28 05:01:02,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152342992] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:01:02,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:01:02,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 05:01:02,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980771596] [2024-11-28 05:01:02,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:01:02,886 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 05:01:02,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:01:02,887 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 05:01:02,887 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 05:01:02,888 INFO L87 Difference]: Start difference. First operand 91 states and 98 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-28 05:01:02,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:01:02,967 INFO L93 Difference]: Finished difference Result 90 states and 97 transitions. [2024-11-28 05:01:02,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 05:01:02,967 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2024-11-28 05:01:02,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:01:02,968 INFO L225 Difference]: With dead ends: 90 [2024-11-28 05:01:02,968 INFO L226 Difference]: Without dead ends: 90 [2024-11-28 05:01:02,968 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 05:01:02,969 INFO L435 NwaCegarLoop]: 95 mSDtfsCounter, 1 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 05:01:02,969 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 164 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 05:01:02,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-11-28 05:01:02,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2024-11-28 05:01:02,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 55 states have (on average 1.6181818181818182) internal successors, (89), 83 states have internal predecessors, (89), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-28 05:01:02,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 97 transitions. [2024-11-28 05:01:02,982 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 97 transitions. Word has length 13 [2024-11-28 05:01:02,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:01:02,982 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 97 transitions. [2024-11-28 05:01:02,983 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-28 05:01:02,983 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 97 transitions. [2024-11-28 05:01:02,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-28 05:01:02,983 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:01:02,983 INFO L218 NwaCegarLoop]: trace histogram [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 05:01:02,983 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-28 05:01:02,987 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-28 05:01:02,987 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:01:02,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1865366838, now seen corresponding path program 1 times [2024-11-28 05:01:02,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:01:02,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434550902] [2024-11-28 05:01:02,988 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:01:02,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:01:03,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:01:03,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:01:03,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:01:03,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434550902] [2024-11-28 05:01:03,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434550902] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:01:03,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:01:03,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-28 05:01:03,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490504973] [2024-11-28 05:01:03,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:01:03,432 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 05:01:03,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:01:03,433 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 05:01:03,434 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-28 05:01:03,434 INFO L87 Difference]: Start difference. First operand 90 states and 97 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 05:01:03,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:01:03,794 INFO L93 Difference]: Finished difference Result 93 states and 103 transitions. [2024-11-28 05:01:03,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 05:01:03,794 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2024-11-28 05:01:03,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:01:03,795 INFO L225 Difference]: With dead ends: 93 [2024-11-28 05:01:03,795 INFO L226 Difference]: Without dead ends: 93 [2024-11-28 05:01:03,796 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-11-28 05:01:03,796 INFO L435 NwaCegarLoop]: 69 mSDtfsCounter, 25 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 05:01:03,797 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 342 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 05:01:03,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-11-28 05:01:03,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 91. [2024-11-28 05:01:03,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 58 states have (on average 1.5689655172413792) internal successors, (91), 83 states have internal predecessors, (91), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-28 05:01:03,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 101 transitions. [2024-11-28 05:01:03,806 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 101 transitions. Word has length 22 [2024-11-28 05:01:03,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:01:03,806 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 101 transitions. [2024-11-28 05:01:03,806 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 05:01:03,807 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 101 transitions. [2024-11-28 05:01:03,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-28 05:01:03,807 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:01:03,807 INFO L218 NwaCegarLoop]: trace histogram [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 05:01:03,807 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-28 05:01:03,807 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-28 05:01:03,808 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:01:03,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1865366837, now seen corresponding path program 1 times [2024-11-28 05:01:03,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:01:03,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213460075] [2024-11-28 05:01:03,808 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:01:03,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:01:03,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:01:04,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:01:04,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:01:04,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213460075] [2024-11-28 05:01:04,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213460075] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:01:04,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:01:04,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-28 05:01:04,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940008971] [2024-11-28 05:01:04,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:01:04,315 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 05:01:04,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:01:04,315 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 05:01:04,316 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-11-28 05:01:04,316 INFO L87 Difference]: Start difference. First operand 91 states and 101 transitions. Second operand has 10 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 05:01:04,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:01:04,812 INFO L93 Difference]: Finished difference Result 110 states and 124 transitions. [2024-11-28 05:01:04,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 05:01:04,813 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2024-11-28 05:01:04,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:01:04,815 INFO L225 Difference]: With dead ends: 110 [2024-11-28 05:01:04,816 INFO L226 Difference]: Without dead ends: 110 [2024-11-28 05:01:04,817 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-11-28 05:01:04,821 INFO L435 NwaCegarLoop]: 76 mSDtfsCounter, 15 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 05:01:04,822 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 441 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 05:01:04,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2024-11-28 05:01:04,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 105. [2024-11-28 05:01:04,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 71 states have (on average 1.5211267605633803) internal successors, (108), 96 states have internal predecessors, (108), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-28 05:01:04,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 120 transitions. [2024-11-28 05:01:04,829 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 120 transitions. Word has length 22 [2024-11-28 05:01:04,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:01:04,830 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 120 transitions. [2024-11-28 05:01:04,830 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 05:01:04,830 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 120 transitions. [2024-11-28 05:01:04,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-28 05:01:04,830 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:01:04,831 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:01:04,831 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-28 05:01:04,831 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-28 05:01:04,831 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:01:04,831 INFO L85 PathProgramCache]: Analyzing trace with hash -150673119, now seen corresponding path program 1 times [2024-11-28 05:01:04,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:01:04,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780174756] [2024-11-28 05:01:04,831 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:01:04,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:01:04,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:01:05,152 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:01:05,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:01:05,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780174756] [2024-11-28 05:01:05,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780174756] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:01:05,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994295693] [2024-11-28 05:01:05,155 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:01:05,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:01:05,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:01:05,159 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:01:05,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 05:01:05,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:01:05,259 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-28 05:01:05,268 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:01:05,318 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 05:01:05,375 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base Int)) (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_internal_~pi~1.base 1))) is different from true [2024-11-28 05:01:05,427 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-28 05:01:05,428 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 12 treesize of output 14 [2024-11-28 05:01:05,447 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2024-11-28 05:01:05,447 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:01:05,680 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:01:05,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994295693] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:01:05,680 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:01:05,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 6] total 11 [2024-11-28 05:01:05,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600627273] [2024-11-28 05:01:05,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:01:05,681 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 05:01:05,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:01:05,682 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 05:01:05,684 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=84, Unknown=1, NotChecked=18, Total=132 [2024-11-28 05:01:05,685 INFO L87 Difference]: Start difference. First operand 105 states and 120 transitions. Second operand has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-28 05:01:06,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:01:06,003 INFO L93 Difference]: Finished difference Result 106 states and 123 transitions. [2024-11-28 05:01:06,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 05:01:06,004 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 26 [2024-11-28 05:01:06,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:01:06,004 INFO L225 Difference]: With dead ends: 106 [2024-11-28 05:01:06,005 INFO L226 Difference]: Without dead ends: 106 [2024-11-28 05:01:06,005 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 47 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=101, Unknown=1, NotChecked=20, Total=156 [2024-11-28 05:01:06,006 INFO L435 NwaCegarLoop]: 81 mSDtfsCounter, 12 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 05:01:06,006 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 392 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 241 Invalid, 0 Unknown, 98 Unchecked, 0.2s Time] [2024-11-28 05:01:06,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2024-11-28 05:01:06,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2024-11-28 05:01:06,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 72 states have (on average 1.5138888888888888) internal successors, (109), 96 states have internal predecessors, (109), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-28 05:01:06,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 123 transitions. [2024-11-28 05:01:06,018 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 123 transitions. Word has length 26 [2024-11-28 05:01:06,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:01:06,019 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 123 transitions. [2024-11-28 05:01:06,019 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-28 05:01:06,019 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 123 transitions. [2024-11-28 05:01:06,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-28 05:01:06,019 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:01:06,019 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:01:06,032 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-28 05:01:06,220 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:01:06,220 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-28 05:01:06,221 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:01:06,221 INFO L85 PathProgramCache]: Analyzing trace with hash -150673118, now seen corresponding path program 1 times [2024-11-28 05:01:06,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:01:06,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99546697] [2024-11-28 05:01:06,221 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:01:06,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:01:06,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:01:06,713 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:01:06,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:01:06,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99546697] [2024-11-28 05:01:06,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99546697] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:01:06,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677953355] [2024-11-28 05:01:06,714 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:01:06,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:01:06,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:01:06,716 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:01:06,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 05:01:06,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:01:06,813 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-28 05:01:06,815 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:01:06,830 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 05:01:06,979 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base Int)) (= (store |c_old(#length)| alloc_and_zero_internal_~pi~1.base 8) |c_#length|)) is different from true [2024-11-28 05:01:07,010 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-28 05:01:07,011 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 12 treesize of output 14 [2024-11-28 05:01:07,038 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2024-11-28 05:01:07,038 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:01:07,383 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:01:07,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677953355] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:01:07,383 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:01:07,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 20 [2024-11-28 05:01:07,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730226525] [2024-11-28 05:01:07,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:01:07,384 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-28 05:01:07,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:01:07,385 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-28 05:01:07,385 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=326, Unknown=1, NotChecked=36, Total=420 [2024-11-28 05:01:07,386 INFO L87 Difference]: Start difference. First operand 106 states and 123 transitions. Second operand has 21 states, 20 states have (on average 2.15) internal successors, (43), 15 states have internal predecessors, (43), 4 states have call successors, (5), 4 states have call predecessors, (5), 7 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-28 05:01:08,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:01:08,064 INFO L93 Difference]: Finished difference Result 107 states and 123 transitions. [2024-11-28 05:01:08,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 05:01:08,064 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.15) internal successors, (43), 15 states have internal predecessors, (43), 4 states have call successors, (5), 4 states have call predecessors, (5), 7 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) Word has length 26 [2024-11-28 05:01:08,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:01:08,065 INFO L225 Difference]: With dead ends: 107 [2024-11-28 05:01:08,065 INFO L226 Difference]: Without dead ends: 107 [2024-11-28 05:01:08,066 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=91, Invalid=512, Unknown=1, NotChecked=46, Total=650 [2024-11-28 05:01:08,066 INFO L435 NwaCegarLoop]: 82 mSDtfsCounter, 16 mSDsluCounter, 661 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 743 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 05:01:08,067 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 743 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 418 Invalid, 0 Unknown, 98 Unchecked, 0.4s Time] [2024-11-28 05:01:08,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2024-11-28 05:01:08,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 105. [2024-11-28 05:01:08,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 72 states have (on average 1.4861111111111112) internal successors, (107), 95 states have internal predecessors, (107), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-28 05:01:08,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 121 transitions. [2024-11-28 05:01:08,072 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 121 transitions. Word has length 26 [2024-11-28 05:01:08,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:01:08,073 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 121 transitions. [2024-11-28 05:01:08,073 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.15) internal successors, (43), 15 states have internal predecessors, (43), 4 states have call successors, (5), 4 states have call predecessors, (5), 7 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-28 05:01:08,073 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 121 transitions. [2024-11-28 05:01:08,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-28 05:01:08,073 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:01:08,074 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 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 05:01:08,084 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-28 05:01:08,274 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:01:08,274 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-28 05:01:08,275 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:01:08,275 INFO L85 PathProgramCache]: Analyzing trace with hash 162440757, now seen corresponding path program 1 times [2024-11-28 05:01:08,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:01:08,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011669731] [2024-11-28 05:01:08,275 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:01:08,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:01:08,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:01:08,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:01:08,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:01:08,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011669731] [2024-11-28 05:01:08,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011669731] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:01:08,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:01:08,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 05:01:08,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906911997] [2024-11-28 05:01:08,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:01:08,380 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 05:01:08,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:01:08,380 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 05:01:08,380 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-28 05:01:08,380 INFO L87 Difference]: Start difference. First operand 105 states and 121 transitions. Second operand has 6 states, 5 states have (on average 4.8) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 05:01:08,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:01:08,549 INFO L93 Difference]: Finished difference Result 123 states and 143 transitions. [2024-11-28 05:01:08,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 05:01:08,549 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2024-11-28 05:01:08,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:01:08,550 INFO L225 Difference]: With dead ends: 123 [2024-11-28 05:01:08,550 INFO L226 Difference]: Without dead ends: 123 [2024-11-28 05:01:08,551 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-28 05:01:08,551 INFO L435 NwaCegarLoop]: 76 mSDtfsCounter, 30 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 05:01:08,551 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 287 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 05:01:08,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2024-11-28 05:01:08,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 117. [2024-11-28 05:01:08,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 84 states have (on average 1.5) internal successors, (126), 107 states have internal predecessors, (126), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-28 05:01:08,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 140 transitions. [2024-11-28 05:01:08,558 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 140 transitions. Word has length 28 [2024-11-28 05:01:08,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:01:08,558 INFO L471 AbstractCegarLoop]: Abstraction has 117 states and 140 transitions. [2024-11-28 05:01:08,558 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 05:01:08,558 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 140 transitions. [2024-11-28 05:01:08,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-28 05:01:08,559 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:01:08,559 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 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 05:01:08,559 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-28 05:01:08,559 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-28 05:01:08,560 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:01:08,560 INFO L85 PathProgramCache]: Analyzing trace with hash 162440758, now seen corresponding path program 1 times [2024-11-28 05:01:08,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:01:08,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924885682] [2024-11-28 05:01:08,560 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:01:08,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:01:08,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:01:08,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:01:08,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:01:08,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924885682] [2024-11-28 05:01:08,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924885682] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:01:08,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:01:08,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-28 05:01:08,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564410397] [2024-11-28 05:01:08,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:01:08,816 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-28 05:01:08,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:01:08,817 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-28 05:01:08,817 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-28 05:01:08,817 INFO L87 Difference]: Start difference. First operand 117 states and 140 transitions. Second operand has 9 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 05:01:09,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:01:09,007 INFO L93 Difference]: Finished difference Result 123 states and 145 transitions. [2024-11-28 05:01:09,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 05:01:09,008 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2024-11-28 05:01:09,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:01:09,008 INFO L225 Difference]: With dead ends: 123 [2024-11-28 05:01:09,008 INFO L226 Difference]: Without dead ends: 123 [2024-11-28 05:01:09,009 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-11-28 05:01:09,009 INFO L435 NwaCegarLoop]: 75 mSDtfsCounter, 19 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 05:01:09,009 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 523 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 05:01:09,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2024-11-28 05:01:09,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 121. [2024-11-28 05:01:09,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 88 states have (on average 1.4886363636363635) internal successors, (131), 111 states have internal predecessors, (131), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-28 05:01:09,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 145 transitions. [2024-11-28 05:01:09,023 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 145 transitions. Word has length 28 [2024-11-28 05:01:09,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:01:09,023 INFO L471 AbstractCegarLoop]: Abstraction has 121 states and 145 transitions. [2024-11-28 05:01:09,023 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 05:01:09,023 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 145 transitions. [2024-11-28 05:01:09,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-28 05:01:09,024 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:01:09,024 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 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 05:01:09,024 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-28 05:01:09,024 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-28 05:01:09,028 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:01:09,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1486813211, now seen corresponding path program 1 times [2024-11-28 05:01:09,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:01:09,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024415435] [2024-11-28 05:01:09,028 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:01:09,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:01:09,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:01:09,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:01:09,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:01:09,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024415435] [2024-11-28 05:01:09,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024415435] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:01:09,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:01:09,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-28 05:01:09,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329932106] [2024-11-28 05:01:09,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:01:09,168 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-28 05:01:09,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:01:09,168 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-28 05:01:09,168 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-28 05:01:09,168 INFO L87 Difference]: Start difference. First operand 121 states and 145 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 05:01:09,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:01:09,230 INFO L93 Difference]: Finished difference Result 123 states and 147 transitions. [2024-11-28 05:01:09,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 05:01:09,230 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2024-11-28 05:01:09,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:01:09,231 INFO L225 Difference]: With dead ends: 123 [2024-11-28 05:01:09,232 INFO L226 Difference]: Without dead ends: 123 [2024-11-28 05:01:09,232 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-28 05:01:09,232 INFO L435 NwaCegarLoop]: 84 mSDtfsCounter, 23 mSDsluCounter, 460 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 05:01:09,232 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 544 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 05:01:09,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2024-11-28 05:01:09,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2024-11-28 05:01:09,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 89 states have (on average 1.4606741573033708) internal successors, (130), 112 states have internal predecessors, (130), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-28 05:01:09,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 144 transitions. [2024-11-28 05:01:09,245 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 144 transitions. Word has length 30 [2024-11-28 05:01:09,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:01:09,245 INFO L471 AbstractCegarLoop]: Abstraction has 122 states and 144 transitions. [2024-11-28 05:01:09,246 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 05:01:09,246 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 144 transitions. [2024-11-28 05:01:09,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-28 05:01:09,246 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:01:09,246 INFO L218 NwaCegarLoop]: trace histogram [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 05:01:09,247 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-28 05:01:09,247 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-28 05:01:09,247 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:01:09,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1155493431, now seen corresponding path program 1 times [2024-11-28 05:01:09,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:01:09,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993658940] [2024-11-28 05:01:09,247 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:01:09,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:01:09,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:01:10,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:01:10,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:01:10,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993658940] [2024-11-28 05:01:10,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993658940] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:01:10,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270890789] [2024-11-28 05:01:10,252 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:01:10,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:01:10,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:01:10,254 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:01:10,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 05:01:10,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:01:10,366 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-11-28 05:01:10,370 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:01:10,377 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 05:01:10,435 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 11 treesize of output 7 [2024-11-28 05:01:10,442 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 11 treesize of output 7 [2024-11-28 05:01:10,461 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 23 treesize of output 11 [2024-11-28 05:01:10,473 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 23 treesize of output 11 [2024-11-28 05:01:10,681 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base Int)) (and (= (select |c_old(#valid)| alloc_and_zero_internal_~pi~1.base) 0) (= |c_#memory_$Pointer$#0.base| (store |c_old(#memory_$Pointer$#0.base)| alloc_and_zero_internal_~pi~1.base (select |c_#memory_$Pointer$#0.base| alloc_and_zero_internal_~pi~1.base))) (= (store |c_old(#memory_$Pointer$#0.offset)| alloc_and_zero_internal_~pi~1.base (select |c_#memory_$Pointer$#0.offset| alloc_and_zero_internal_~pi~1.base)) |c_#memory_$Pointer$#0.offset|))) is different from true [2024-11-28 05:01:10,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 05:01:10,728 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 16 treesize of output 11 [2024-11-28 05:01:10,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 05:01:10,739 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 16 treesize of output 11 [2024-11-28 05:01:10,751 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-28 05:01:10,751 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 05:01:10,916 INFO L349 Elim1Store]: treesize reduction 21, result has 38.2 percent of original size [2024-11-28 05:01:10,917 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 27 treesize of output 17 [2024-11-28 05:01:10,939 INFO L349 Elim1Store]: treesize reduction 21, result has 38.2 percent of original size [2024-11-28 05:01:10,939 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 27 treesize of output 17 [2024-11-28 05:01:11,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:01:11,216 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:01:12,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270890789] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:01:12,190 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 05:01:12,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 26 [2024-11-28 05:01:12,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566895340] [2024-11-28 05:01:12,190 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 05:01:12,190 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-28 05:01:12,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:01:12,191 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-28 05:01:12,192 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=789, Unknown=1, NotChecked=56, Total=930 [2024-11-28 05:01:12,192 INFO L87 Difference]: Start difference. First operand 122 states and 144 transitions. Second operand has 26 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-28 05:01:13,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:01:13,312 INFO L93 Difference]: Finished difference Result 128 states and 150 transitions. [2024-11-28 05:01:13,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-28 05:01:13,313 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 31 [2024-11-28 05:01:13,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:01:13,314 INFO L225 Difference]: With dead ends: 128 [2024-11-28 05:01:13,314 INFO L226 Difference]: Without dead ends: 128 [2024-11-28 05:01:13,314 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=134, Invalid=1201, Unknown=1, NotChecked=70, Total=1406 [2024-11-28 05:01:13,315 INFO L435 NwaCegarLoop]: 75 mSDtfsCounter, 9 mSDsluCounter, 1052 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 1127 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-28 05:01:13,315 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 1127 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 601 Invalid, 0 Unknown, 108 Unchecked, 0.6s Time] [2024-11-28 05:01:13,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2024-11-28 05:01:13,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2024-11-28 05:01:13,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 95 states have (on average 1.431578947368421) internal successors, (136), 118 states have internal predecessors, (136), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-28 05:01:13,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 150 transitions. [2024-11-28 05:01:13,322 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 150 transitions. Word has length 31 [2024-11-28 05:01:13,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:01:13,322 INFO L471 AbstractCegarLoop]: Abstraction has 128 states and 150 transitions. [2024-11-28 05:01:13,323 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-28 05:01:13,323 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 150 transitions. [2024-11-28 05:01:13,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-28 05:01:13,326 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:01:13,327 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, 1, 1, 1] [2024-11-28 05:01:13,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-28 05:01:13,527 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:01:13,528 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-28 05:01:13,528 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:01:13,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1408907363, now seen corresponding path program 1 times [2024-11-28 05:01:13,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:01:13,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716754966] [2024-11-28 05:01:13,528 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:01:13,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:01:13,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:01:14,061 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:01:14,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:01:14,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716754966] [2024-11-28 05:01:14,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716754966] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:01:14,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315637466] [2024-11-28 05:01:14,062 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:01:14,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:01:14,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:01:14,066 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:01:14,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 05:01:14,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:01:14,172 INFO L256 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-11-28 05:01:14,175 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:01:14,183 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 05:01:14,195 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 05:01:14,345 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-11-28 05:01:14,346 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2024-11-28 05:01:14,358 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 14 treesize of output 9 [2024-11-28 05:01:14,501 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base Int)) (and (= (store |c_old(#length)| alloc_and_zero_internal_~pi~1.base (select |c_#length| alloc_and_zero_internal_~pi~1.base)) |c_#length|) (= (select |c_old(#valid)| alloc_and_zero_internal_~pi~1.base) 0))) is different from true [2024-11-28 05:01:14,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 05:01:14,531 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-28 05:01:14,552 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2024-11-28 05:01:14,552 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2024-11-28 05:01:14,593 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 4 not checked. [2024-11-28 05:01:14,593 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:01:14,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315637466] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:01:14,753 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 05:01:14,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 16 [2024-11-28 05:01:14,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830141214] [2024-11-28 05:01:14,755 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 05:01:14,755 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-28 05:01:14,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:01:14,756 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-28 05:01:14,756 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=248, Unknown=1, NotChecked=32, Total=342 [2024-11-28 05:01:14,756 INFO L87 Difference]: Start difference. First operand 128 states and 150 transitions. Second operand has 17 states, 16 states have (on average 2.4375) internal successors, (39), 14 states have internal predecessors, (39), 3 states have call successors, (4), 2 states have call predecessors, (4), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-28 05:01:15,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:01:15,297 INFO L93 Difference]: Finished difference Result 129 states and 146 transitions. [2024-11-28 05:01:15,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 05:01:15,297 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.4375) internal successors, (39), 14 states have internal predecessors, (39), 3 states have call successors, (4), 2 states have call predecessors, (4), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 34 [2024-11-28 05:01:15,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:01:15,298 INFO L225 Difference]: With dead ends: 129 [2024-11-28 05:01:15,299 INFO L226 Difference]: Without dead ends: 129 [2024-11-28 05:01:15,299 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=71, Invalid=312, Unknown=1, NotChecked=36, Total=420 [2024-11-28 05:01:15,300 INFO L435 NwaCegarLoop]: 68 mSDtfsCounter, 60 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 05:01:15,300 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 367 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 366 Invalid, 0 Unknown, 102 Unchecked, 0.4s Time] [2024-11-28 05:01:15,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2024-11-28 05:01:15,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 120. [2024-11-28 05:01:15,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 89 states have (on average 1.3932584269662922) internal successors, (124), 111 states have internal predecessors, (124), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-28 05:01:15,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 136 transitions. [2024-11-28 05:01:15,305 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 136 transitions. Word has length 34 [2024-11-28 05:01:15,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:01:15,305 INFO L471 AbstractCegarLoop]: Abstraction has 120 states and 136 transitions. [2024-11-28 05:01:15,305 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.4375) internal successors, (39), 14 states have internal predecessors, (39), 3 states have call successors, (4), 2 states have call predecessors, (4), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-28 05:01:15,305 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 136 transitions. [2024-11-28 05:01:15,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-28 05:01:15,306 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:01:15,306 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:01:15,319 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-28 05:01:15,507 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:01:15,507 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-28 05:01:15,507 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:01:15,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1967410863, now seen corresponding path program 1 times [2024-11-28 05:01:15,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:01:15,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46534639] [2024-11-28 05:01:15,508 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:01:15,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:01:15,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:01:15,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:01:15,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:01:15,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46534639] [2024-11-28 05:01:15,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46534639] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:01:15,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534209388] [2024-11-28 05:01:15,592 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:01:15,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:01:15,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:01:15,595 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:01:15,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 05:01:15,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:01:15,697 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-28 05:01:15,699 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:01:15,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:01:15,719 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:01:15,737 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-28 05:01:15,737 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 12 treesize of output 11 [2024-11-28 05:01:15,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:01:15,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534209388] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:01:15,753 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:01:15,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2024-11-28 05:01:15,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857795844] [2024-11-28 05:01:15,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:01:15,753 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 05:01:15,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:01:15,754 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 05:01:15,754 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 05:01:15,754 INFO L87 Difference]: Start difference. First operand 120 states and 136 transitions. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 05:01:15,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:01:15,869 INFO L93 Difference]: Finished difference Result 135 states and 154 transitions. [2024-11-28 05:01:15,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 05:01:15,870 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 33 [2024-11-28 05:01:15,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:01:15,871 INFO L225 Difference]: With dead ends: 135 [2024-11-28 05:01:15,871 INFO L226 Difference]: Without dead ends: 135 [2024-11-28 05:01:15,871 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 05:01:15,871 INFO L435 NwaCegarLoop]: 71 mSDtfsCounter, 25 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 05:01:15,872 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 230 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 05:01:15,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2024-11-28 05:01:15,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 122. [2024-11-28 05:01:15,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 93 states have (on average 1.3870967741935485) internal successors, (129), 113 states have internal predecessors, (129), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-28 05:01:15,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 141 transitions. [2024-11-28 05:01:15,877 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 141 transitions. Word has length 33 [2024-11-28 05:01:15,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:01:15,877 INFO L471 AbstractCegarLoop]: Abstraction has 122 states and 141 transitions. [2024-11-28 05:01:15,877 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 05:01:15,877 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 141 transitions. [2024-11-28 05:01:15,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-28 05:01:15,878 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:01:15,878 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:01:15,887 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-28 05:01:16,079 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-28 05:01:16,079 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-28 05:01:16,080 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:01:16,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1967410864, now seen corresponding path program 1 times [2024-11-28 05:01:16,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:01:16,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889152942] [2024-11-28 05:01:16,080 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:01:16,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:01:16,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:01:16,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:01:16,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:01:16,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889152942] [2024-11-28 05:01:16,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889152942] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:01:16,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753427939] [2024-11-28 05:01:16,357 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:01:16,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:01:16,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:01:16,361 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:01:16,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 05:01:16,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:01:16,464 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-28 05:01:16,467 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:01:16,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:01:16,661 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:01:16,867 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:01:16,867 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 15 treesize of output 19 [2024-11-28 05:01:16,964 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:01:16,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753427939] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-28 05:01:16,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-28 05:01:16,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10, 7] total 22 [2024-11-28 05:01:16,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235470001] [2024-11-28 05:01:16,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:01:16,965 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-28 05:01:16,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:01:16,965 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-28 05:01:16,966 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2024-11-28 05:01:16,966 INFO L87 Difference]: Start difference. First operand 122 states and 141 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 8 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 05:01:17,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:01:17,210 INFO L93 Difference]: Finished difference Result 138 states and 163 transitions. [2024-11-28 05:01:17,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 05:01:17,210 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 8 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2024-11-28 05:01:17,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:01:17,211 INFO L225 Difference]: With dead ends: 138 [2024-11-28 05:01:17,211 INFO L226 Difference]: Without dead ends: 138 [2024-11-28 05:01:17,212 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2024-11-28 05:01:17,212 INFO L435 NwaCegarLoop]: 69 mSDtfsCounter, 43 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 05:01:17,212 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 306 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 05:01:17,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2024-11-28 05:01:17,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 128. [2024-11-28 05:01:17,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 99 states have (on average 1.404040404040404) internal successors, (139), 119 states have internal predecessors, (139), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-28 05:01:17,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 151 transitions. [2024-11-28 05:01:17,217 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 151 transitions. Word has length 33 [2024-11-28 05:01:17,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:01:17,218 INFO L471 AbstractCegarLoop]: Abstraction has 128 states and 151 transitions. [2024-11-28 05:01:17,218 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 8 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 05:01:17,218 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 151 transitions. [2024-11-28 05:01:17,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-28 05:01:17,219 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:01:17,219 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, 1, 1, 1, 1] [2024-11-28 05:01:17,228 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-28 05:01:17,423 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:01:17,423 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-28 05:01:17,424 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:01:17,424 INFO L85 PathProgramCache]: Analyzing trace with hash 357260193, now seen corresponding path program 1 times [2024-11-28 05:01:17,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:01:17,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946255451] [2024-11-28 05:01:17,424 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:01:17,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:01:17,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:01:17,702 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:01:17,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:01:17,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946255451] [2024-11-28 05:01:17,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946255451] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:01:17,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:01:17,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 05:01:17,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196642508] [2024-11-28 05:01:17,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:01:17,703 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 05:01:17,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:01:17,704 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 05:01:17,704 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-28 05:01:17,704 INFO L87 Difference]: Start difference. First operand 128 states and 151 transitions. Second operand has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 05:01:17,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:01:17,851 INFO L93 Difference]: Finished difference Result 127 states and 149 transitions. [2024-11-28 05:01:17,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 05:01:17,852 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 35 [2024-11-28 05:01:17,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:01:17,853 INFO L225 Difference]: With dead ends: 127 [2024-11-28 05:01:17,853 INFO L226 Difference]: Without dead ends: 127 [2024-11-28 05:01:17,853 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-28 05:01:17,854 INFO L435 NwaCegarLoop]: 79 mSDtfsCounter, 4 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 05:01:17,855 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 365 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 05:01:17,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-11-28 05:01:17,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2024-11-28 05:01:17,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 99 states have (on average 1.3838383838383839) internal successors, (137), 118 states have internal predecessors, (137), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-28 05:01:17,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 149 transitions. [2024-11-28 05:01:17,863 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 149 transitions. Word has length 35 [2024-11-28 05:01:17,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:01:17,863 INFO L471 AbstractCegarLoop]: Abstraction has 127 states and 149 transitions. [2024-11-28 05:01:17,863 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 05:01:17,863 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 149 transitions. [2024-11-28 05:01:17,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-28 05:01:17,864 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:01:17,864 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, 1, 1, 1, 1] [2024-11-28 05:01:17,864 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-28 05:01:17,864 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-28 05:01:17,865 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:01:17,865 INFO L85 PathProgramCache]: Analyzing trace with hash 357260192, now seen corresponding path program 1 times [2024-11-28 05:01:17,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:01:17,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585727210] [2024-11-28 05:01:17,865 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:01:17,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:01:17,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:01:17,995 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 05:01:17,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:01:17,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585727210] [2024-11-28 05:01:17,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585727210] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:01:17,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:01:17,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 05:01:17,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439449456] [2024-11-28 05:01:17,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:01:17,996 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 05:01:17,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:01:17,996 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 05:01:17,996 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-28 05:01:17,996 INFO L87 Difference]: Start difference. First operand 127 states and 149 transitions. Second operand has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 05:01:18,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:01:18,133 INFO L93 Difference]: Finished difference Result 126 states and 147 transitions. [2024-11-28 05:01:18,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 05:01:18,134 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 35 [2024-11-28 05:01:18,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:01:18,135 INFO L225 Difference]: With dead ends: 126 [2024-11-28 05:01:18,135 INFO L226 Difference]: Without dead ends: 126 [2024-11-28 05:01:18,136 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-28 05:01:18,136 INFO L435 NwaCegarLoop]: 79 mSDtfsCounter, 3 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 05:01:18,136 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 347 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 05:01:18,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2024-11-28 05:01:18,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2024-11-28 05:01:18,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 99 states have (on average 1.3636363636363635) internal successors, (135), 117 states have internal predecessors, (135), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-28 05:01:18,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 147 transitions. [2024-11-28 05:01:18,145 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 147 transitions. Word has length 35 [2024-11-28 05:01:18,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:01:18,145 INFO L471 AbstractCegarLoop]: Abstraction has 126 states and 147 transitions. [2024-11-28 05:01:18,145 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 05:01:18,146 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 147 transitions. [2024-11-28 05:01:18,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-28 05:01:18,146 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:01:18,146 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:01:18,147 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-28 05:01:18,147 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-28 05:01:18,149 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:01:18,149 INFO L85 PathProgramCache]: Analyzing trace with hash 860223637, now seen corresponding path program 1 times [2024-11-28 05:01:18,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:01:18,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557105402] [2024-11-28 05:01:18,149 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:01:18,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:01:18,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:01:18,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:01:18,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:01:18,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557105402] [2024-11-28 05:01:18,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557105402] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:01:18,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:01:18,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-28 05:01:18,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694265771] [2024-11-28 05:01:18,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:01:18,273 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-28 05:01:18,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:01:18,274 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-28 05:01:18,274 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-28 05:01:18,274 INFO L87 Difference]: Start difference. First operand 126 states and 147 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 05:01:18,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:01:18,372 INFO L93 Difference]: Finished difference Result 133 states and 154 transitions. [2024-11-28 05:01:18,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 05:01:18,373 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 34 [2024-11-28 05:01:18,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:01:18,374 INFO L225 Difference]: With dead ends: 133 [2024-11-28 05:01:18,374 INFO L226 Difference]: Without dead ends: 133 [2024-11-28 05:01:18,374 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-28 05:01:18,375 INFO L435 NwaCegarLoop]: 69 mSDtfsCounter, 43 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 05:01:18,375 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 493 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 05:01:18,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2024-11-28 05:01:18,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 127. [2024-11-28 05:01:18,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 100 states have (on average 1.33) internal successors, (133), 118 states have internal predecessors, (133), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-28 05:01:18,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 145 transitions. [2024-11-28 05:01:18,380 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 145 transitions. Word has length 34 [2024-11-28 05:01:18,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:01:18,380 INFO L471 AbstractCegarLoop]: Abstraction has 127 states and 145 transitions. [2024-11-28 05:01:18,380 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 05:01:18,380 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 145 transitions. [2024-11-28 05:01:18,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-28 05:01:18,381 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:01:18,381 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:01:18,381 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-28 05:01:18,381 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-28 05:01:18,382 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:01:18,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1992938169, now seen corresponding path program 1 times [2024-11-28 05:01:18,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:01:18,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892403360] [2024-11-28 05:01:18,382 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:01:18,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:01:18,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:01:18,681 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:01:18,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:01:18,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892403360] [2024-11-28 05:01:18,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892403360] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:01:18,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60575894] [2024-11-28 05:01:18,682 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:01:18,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:01:18,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:01:18,684 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:01:18,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 05:01:18,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:01:18,811 INFO L256 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-28 05:01:18,814 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:01:18,822 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 05:01:18,842 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 15 treesize of output 1 [2024-11-28 05:01:18,849 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 17 treesize of output 9 [2024-11-28 05:01:18,866 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base Int)) (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_internal_~pi~1.base 1))) is different from true [2024-11-28 05:01:18,891 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-28 05:01:18,891 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 12 treesize of output 14 [2024-11-28 05:01:18,906 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 4 not checked. [2024-11-28 05:01:18,906 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:01:19,067 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:01:19,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60575894] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:01:19,067 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:01:19,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 8] total 13 [2024-11-28 05:01:19,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813543674] [2024-11-28 05:01:19,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:01:19,067 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-28 05:01:19,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:01:19,068 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-28 05:01:19,068 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=126, Unknown=1, NotChecked=22, Total=182 [2024-11-28 05:01:19,068 INFO L87 Difference]: Start difference. First operand 127 states and 145 transitions. Second operand has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 2 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-28 05:01:19,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:01:19,418 INFO L93 Difference]: Finished difference Result 126 states and 144 transitions. [2024-11-28 05:01:19,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 05:01:19,419 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 2 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 38 [2024-11-28 05:01:19,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:01:19,420 INFO L225 Difference]: With dead ends: 126 [2024-11-28 05:01:19,420 INFO L226 Difference]: Without dead ends: 126 [2024-11-28 05:01:19,420 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 71 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=197, Unknown=1, NotChecked=28, Total=272 [2024-11-28 05:01:19,420 INFO L435 NwaCegarLoop]: 81 mSDtfsCounter, 8 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 05:01:19,421 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 607 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 361 Invalid, 0 Unknown, 89 Unchecked, 0.3s Time] [2024-11-28 05:01:19,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2024-11-28 05:01:19,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2024-11-28 05:01:19,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 100 states have (on average 1.32) internal successors, (132), 117 states have internal predecessors, (132), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-28 05:01:19,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 144 transitions. [2024-11-28 05:01:19,425 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 144 transitions. Word has length 38 [2024-11-28 05:01:19,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:01:19,426 INFO L471 AbstractCegarLoop]: Abstraction has 126 states and 144 transitions. [2024-11-28 05:01:19,426 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 2 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-28 05:01:19,426 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 144 transitions. [2024-11-28 05:01:19,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-28 05:01:19,426 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:01:19,427 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:01:19,436 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-28 05:01:19,631 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:01:19,631 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-28 05:01:19,631 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:01:19,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1992938170, now seen corresponding path program 1 times [2024-11-28 05:01:19,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:01:19,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112034762] [2024-11-28 05:01:19,632 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:01:19,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:01:19,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:01:20,105 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:01:20,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:01:20,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112034762] [2024-11-28 05:01:20,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112034762] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:01:20,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367296973] [2024-11-28 05:01:20,106 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:01:20,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:01:20,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:01:20,108 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:01:20,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 05:01:20,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:01:20,242 INFO L256 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-28 05:01:20,245 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:01:20,251 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 05:01:20,341 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 15 treesize of output 1 [2024-11-28 05:01:20,345 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 11 treesize of output 7 [2024-11-28 05:01:20,386 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 17 treesize of output 9 [2024-11-28 05:01:20,475 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base Int)) (= (store |c_old(#length)| alloc_and_zero_internal_~pi~1.base 8) |c_#length|)) is different from true [2024-11-28 05:01:20,497 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-28 05:01:20,497 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 12 treesize of output 14 [2024-11-28 05:01:20,533 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 4 not checked. [2024-11-28 05:01:20,533 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:01:20,911 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:01:20,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367296973] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:01:20,911 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:01:20,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 26 [2024-11-28 05:01:20,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383817115] [2024-11-28 05:01:20,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:01:20,912 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-28 05:01:20,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:01:20,913 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-28 05:01:20,914 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=581, Unknown=1, NotChecked=48, Total=702 [2024-11-28 05:01:20,914 INFO L87 Difference]: Start difference. First operand 126 states and 144 transitions. Second operand has 27 states, 26 states have (on average 2.269230769230769) internal successors, (59), 21 states have internal predecessors, (59), 4 states have call successors, (6), 4 states have call predecessors, (6), 7 states have return successors, (8), 7 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-28 05:01:21,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:01:21,737 INFO L93 Difference]: Finished difference Result 127 states and 145 transitions. [2024-11-28 05:01:21,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 05:01:21,737 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.269230769230769) internal successors, (59), 21 states have internal predecessors, (59), 4 states have call successors, (6), 4 states have call predecessors, (6), 7 states have return successors, (8), 7 states have call predecessors, (8), 4 states have call successors, (8) Word has length 38 [2024-11-28 05:01:21,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:01:21,738 INFO L225 Difference]: With dead ends: 127 [2024-11-28 05:01:21,738 INFO L226 Difference]: Without dead ends: 127 [2024-11-28 05:01:21,739 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 59 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=137, Invalid=1056, Unknown=1, NotChecked=66, Total=1260 [2024-11-28 05:01:21,739 INFO L435 NwaCegarLoop]: 82 mSDtfsCounter, 20 mSDsluCounter, 771 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 853 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 90 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-28 05:01:21,740 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 853 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 495 Invalid, 0 Unknown, 90 Unchecked, 0.5s Time] [2024-11-28 05:01:21,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-11-28 05:01:21,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 123. [2024-11-28 05:01:21,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 99 states have (on average 1.3131313131313131) internal successors, (130), 115 states have internal predecessors, (130), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-28 05:01:21,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 140 transitions. [2024-11-28 05:01:21,744 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 140 transitions. Word has length 38 [2024-11-28 05:01:21,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:01:21,744 INFO L471 AbstractCegarLoop]: Abstraction has 123 states and 140 transitions. [2024-11-28 05:01:21,744 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.269230769230769) internal successors, (59), 21 states have internal predecessors, (59), 4 states have call successors, (6), 4 states have call predecessors, (6), 7 states have return successors, (8), 7 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-28 05:01:21,745 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 140 transitions. [2024-11-28 05:01:21,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-28 05:01:21,745 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:01:21,745 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:01:21,758 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-28 05:01:21,946 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:01:21,946 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-28 05:01:21,946 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:01:21,947 INFO L85 PathProgramCache]: Analyzing trace with hash 2013367130, now seen corresponding path program 1 times [2024-11-28 05:01:21,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:01:21,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173676539] [2024-11-28 05:01:21,947 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:01:21,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:01:21,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:01:22,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:01:22,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:01:22,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173676539] [2024-11-28 05:01:22,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173676539] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:01:22,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:01:22,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2024-11-28 05:01:22,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730441805] [2024-11-28 05:01:22,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:01:22,529 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-28 05:01:22,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:01:22,530 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-28 05:01:22,530 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2024-11-28 05:01:22,531 INFO L87 Difference]: Start difference. First operand 123 states and 140 transitions. Second operand has 18 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 05:01:23,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:01:23,034 INFO L93 Difference]: Finished difference Result 142 states and 163 transitions. [2024-11-28 05:01:23,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-28 05:01:23,035 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 36 [2024-11-28 05:01:23,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:01:23,036 INFO L225 Difference]: With dead ends: 142 [2024-11-28 05:01:23,036 INFO L226 Difference]: Without dead ends: 142 [2024-11-28 05:01:23,036 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2024-11-28 05:01:23,037 INFO L435 NwaCegarLoop]: 52 mSDtfsCounter, 48 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 632 SdHoareTripleChecker+Invalid, 755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 05:01:23,037 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 632 Invalid, 755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 748 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 05:01:23,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2024-11-28 05:01:23,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 133. [2024-11-28 05:01:23,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 110 states have (on average 1.3) internal successors, (143), 125 states have internal predecessors, (143), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-28 05:01:23,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 153 transitions. [2024-11-28 05:01:23,042 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 153 transitions. Word has length 36 [2024-11-28 05:01:23,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:01:23,043 INFO L471 AbstractCegarLoop]: Abstraction has 133 states and 153 transitions. [2024-11-28 05:01:23,043 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 05:01:23,043 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 153 transitions. [2024-11-28 05:01:23,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-28 05:01:23,043 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:01:23,044 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:01:23,044 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-11-28 05:01:23,044 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-28 05:01:23,044 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:01:23,044 INFO L85 PathProgramCache]: Analyzing trace with hash 2013367131, now seen corresponding path program 1 times [2024-11-28 05:01:23,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:01:23,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368404895] [2024-11-28 05:01:23,045 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:01:23,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:01:23,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:01:23,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:01:23,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:01:23,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368404895] [2024-11-28 05:01:23,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368404895] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:01:23,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:01:23,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2024-11-28 05:01:23,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119671589] [2024-11-28 05:01:23,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:01:23,860 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-28 05:01:23,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:01:23,860 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-28 05:01:23,861 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2024-11-28 05:01:23,861 INFO L87 Difference]: Start difference. First operand 133 states and 153 transitions. Second operand has 18 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 05:01:24,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:01:24,399 INFO L93 Difference]: Finished difference Result 152 states and 176 transitions. [2024-11-28 05:01:24,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-28 05:01:24,402 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 36 [2024-11-28 05:01:24,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:01:24,404 INFO L225 Difference]: With dead ends: 152 [2024-11-28 05:01:24,404 INFO L226 Difference]: Without dead ends: 152 [2024-11-28 05:01:24,404 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2024-11-28 05:01:24,405 INFO L435 NwaCegarLoop]: 53 mSDtfsCounter, 53 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 609 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 05:01:24,405 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 609 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 596 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 05:01:24,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2024-11-28 05:01:24,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 144. [2024-11-28 05:01:24,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 121 states have (on average 1.322314049586777) internal successors, (160), 136 states have internal predecessors, (160), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-28 05:01:24,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 170 transitions. [2024-11-28 05:01:24,418 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 170 transitions. Word has length 36 [2024-11-28 05:01:24,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:01:24,418 INFO L471 AbstractCegarLoop]: Abstraction has 144 states and 170 transitions. [2024-11-28 05:01:24,418 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 05:01:24,418 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 170 transitions. [2024-11-28 05:01:24,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-28 05:01:24,418 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:01:24,418 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:01:24,419 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-11-28 05:01:24,419 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-28 05:01:24,419 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:01:24,419 INFO L85 PathProgramCache]: Analyzing trace with hash 2110604010, now seen corresponding path program 1 times [2024-11-28 05:01:24,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:01:24,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252884123] [2024-11-28 05:01:24,419 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:01:24,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:01:24,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:01:24,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:01:24,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:01:24,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252884123] [2024-11-28 05:01:24,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252884123] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:01:24,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:01:24,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-28 05:01:24,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301546976] [2024-11-28 05:01:24,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:01:24,559 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 05:01:24,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:01:24,559 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 05:01:24,559 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2024-11-28 05:01:24,560 INFO L87 Difference]: Start difference. First operand 144 states and 170 transitions. Second operand has 10 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 05:01:24,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:01:24,648 INFO L93 Difference]: Finished difference Result 148 states and 171 transitions. [2024-11-28 05:01:24,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 05:01:24,648 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 38 [2024-11-28 05:01:24,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:01:24,649 INFO L225 Difference]: With dead ends: 148 [2024-11-28 05:01:24,649 INFO L226 Difference]: Without dead ends: 148 [2024-11-28 05:01:24,649 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2024-11-28 05:01:24,650 INFO L435 NwaCegarLoop]: 67 mSDtfsCounter, 44 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 05:01:24,650 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 480 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 05:01:24,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2024-11-28 05:01:24,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 133. [2024-11-28 05:01:24,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 110 states have (on average 1.2818181818181817) internal successors, (141), 125 states have internal predecessors, (141), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-28 05:01:24,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 151 transitions. [2024-11-28 05:01:24,659 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 151 transitions. Word has length 38 [2024-11-28 05:01:24,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:01:24,659 INFO L471 AbstractCegarLoop]: Abstraction has 133 states and 151 transitions. [2024-11-28 05:01:24,659 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 05:01:24,659 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 151 transitions. [2024-11-28 05:01:24,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-28 05:01:24,659 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:01:24,660 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:01:24,660 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-11-28 05:01:24,660 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-28 05:01:24,660 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:01:24,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1001962680, now seen corresponding path program 1 times [2024-11-28 05:01:24,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:01:24,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181187732] [2024-11-28 05:01:24,660 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:01:24,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:01:24,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:01:25,728 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:01:25,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:01:25,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181187732] [2024-11-28 05:01:25,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181187732] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:01:25,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:01:25,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2024-11-28 05:01:25,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120254301] [2024-11-28 05:01:25,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:01:25,729 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-28 05:01:25,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:01:25,730 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-28 05:01:25,730 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=501, Unknown=0, NotChecked=0, Total=552 [2024-11-28 05:01:25,730 INFO L87 Difference]: Start difference. First operand 133 states and 151 transitions. Second operand has 24 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 21 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 05:01:26,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:01:26,765 INFO L93 Difference]: Finished difference Result 154 states and 176 transitions. [2024-11-28 05:01:26,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-28 05:01:26,766 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 21 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 39 [2024-11-28 05:01:26,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:01:26,766 INFO L225 Difference]: With dead ends: 154 [2024-11-28 05:01:26,766 INFO L226 Difference]: Without dead ends: 154 [2024-11-28 05:01:26,767 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=100, Invalid=1022, Unknown=0, NotChecked=0, Total=1122 [2024-11-28 05:01:26,767 INFO L435 NwaCegarLoop]: 51 mSDtfsCounter, 43 mSDsluCounter, 679 mSDsCounter, 0 mSdLazyCounter, 912 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 730 SdHoareTripleChecker+Invalid, 928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-28 05:01:26,767 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 730 Invalid, 928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 912 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-28 05:01:26,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2024-11-28 05:01:26,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 134. [2024-11-28 05:01:26,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 111 states have (on average 1.2792792792792793) internal successors, (142), 126 states have internal predecessors, (142), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-28 05:01:26,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 152 transitions. [2024-11-28 05:01:26,772 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 152 transitions. Word has length 39 [2024-11-28 05:01:26,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:01:26,773 INFO L471 AbstractCegarLoop]: Abstraction has 134 states and 152 transitions. [2024-11-28 05:01:26,773 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 21 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 05:01:26,773 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 152 transitions. [2024-11-28 05:01:26,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-28 05:01:26,774 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:01:26,774 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:01:26,774 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-11-28 05:01:26,774 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-28 05:01:26,774 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:01:26,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1317075006, now seen corresponding path program 1 times [2024-11-28 05:01:26,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:01:26,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903608147] [2024-11-28 05:01:26,775 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:01:26,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:01:26,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:01:26,924 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:01:26,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:01:26,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903608147] [2024-11-28 05:01:26,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903608147] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:01:26,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:01:26,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-28 05:01:26,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971961322] [2024-11-28 05:01:26,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:01:26,925 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-28 05:01:26,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:01:26,926 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-28 05:01:26,926 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-28 05:01:26,926 INFO L87 Difference]: Start difference. First operand 134 states and 152 transitions. Second operand has 9 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 05:01:27,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:01:27,079 INFO L93 Difference]: Finished difference Result 135 states and 153 transitions. [2024-11-28 05:01:27,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 05:01:27,079 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 41 [2024-11-28 05:01:27,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:01:27,080 INFO L225 Difference]: With dead ends: 135 [2024-11-28 05:01:27,080 INFO L226 Difference]: Without dead ends: 135 [2024-11-28 05:01:27,080 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-28 05:01:27,081 INFO L435 NwaCegarLoop]: 65 mSDtfsCounter, 30 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 05:01:27,081 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 400 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 05:01:27,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2024-11-28 05:01:27,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2024-11-28 05:01:27,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 112 states have (on average 1.2767857142857142) internal successors, (143), 127 states have internal predecessors, (143), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-28 05:01:27,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 153 transitions. [2024-11-28 05:01:27,088 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 153 transitions. Word has length 41 [2024-11-28 05:01:27,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:01:27,088 INFO L471 AbstractCegarLoop]: Abstraction has 135 states and 153 transitions. [2024-11-28 05:01:27,089 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 05:01:27,089 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 153 transitions. [2024-11-28 05:01:27,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-28 05:01:27,089 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:01:27,089 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:01:27,089 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-11-28 05:01:27,090 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-28 05:01:27,090 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:01:27,090 INFO L85 PathProgramCache]: Analyzing trace with hash 308668209, now seen corresponding path program 1 times [2024-11-28 05:01:27,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:01:27,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742896583] [2024-11-28 05:01:27,090 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:01:27,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:01:27,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:01:28,494 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:01:28,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:01:28,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742896583] [2024-11-28 05:01:28,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742896583] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:01:28,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050352750] [2024-11-28 05:01:28,495 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:01:28,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:01:28,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:01:28,497 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:01:28,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-28 05:01:28,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:01:28,630 INFO L256 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 86 conjuncts are in the unsatisfiable core [2024-11-28 05:01:28,637 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:01:28,643 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 05:01:28,689 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 11 treesize of output 7 [2024-11-28 05:01:28,697 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 11 treesize of output 7 [2024-11-28 05:01:28,761 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 23 treesize of output 11 [2024-11-28 05:01:28,774 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 23 treesize of output 11 [2024-11-28 05:01:29,129 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-28 05:01:29,129 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 [2024-11-28 05:01:29,160 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-11-28 05:01:29,160 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2024-11-28 05:01:29,176 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 16 treesize of output 11 [2024-11-28 05:01:29,412 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base Int)) (and (= (select |c_old(#valid)| alloc_and_zero_internal_~pi~1.base) 0) (= |c_#memory_$Pointer$#0.base| (store |c_old(#memory_$Pointer$#0.base)| alloc_and_zero_internal_~pi~1.base (select |c_#memory_$Pointer$#0.base| alloc_and_zero_internal_~pi~1.base))) (= (store |c_old(#memory_$Pointer$#0.offset)| alloc_and_zero_internal_~pi~1.base (select |c_#memory_$Pointer$#0.offset| alloc_and_zero_internal_~pi~1.base)) |c_#memory_$Pointer$#0.offset|))) is different from true [2024-11-28 05:01:29,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 05:01:29,451 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 05:01:29,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 05:01:29,457 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 05:01:29,474 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2024-11-28 05:01:29,474 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2024-11-28 05:01:29,556 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 16 treesize of output 11 [2024-11-28 05:01:29,564 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 16 treesize of output 11 [2024-11-28 05:01:29,743 INFO L349 Elim1Store]: treesize reduction 21, result has 38.2 percent of original size [2024-11-28 05:01:29,744 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 27 treesize of output 17 [2024-11-28 05:01:29,762 INFO L349 Elim1Store]: treesize reduction 21, result has 38.2 percent of original size [2024-11-28 05:01:29,762 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 27 treesize of output 17 [2024-11-28 05:01:30,009 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 3 not checked. [2024-11-28 05:01:30,009 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:01:30,818 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse1 (+ |c_ULTIMATE.start_create_~now~1#1.offset| 8))) (and (forall ((|v_ULTIMATE.start_loop_~x#1.offset_21| Int) (v_ArrVal_819 (Array Int Int)) (|ULTIMATE.start_create_~shared~0#1.base| Int)) (or (< |c_ULTIMATE.start_create_~sll~1#1.offset| |v_ULTIMATE.start_loop_~x#1.offset_21|) (= (select (select (let ((.cse0 (store |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_create_internal_~now~0#1.base| v_ArrVal_819))) (store .cse0 |c_ULTIMATE.start_create_~now~1#1.base| (store (select .cse0 |c_ULTIMATE.start_create_~now~1#1.base|) .cse1 |ULTIMATE.start_create_~shared~0#1.base|))) |c_ULTIMATE.start_create_~sll~1#1.base|) |v_ULTIMATE.start_loop_~x#1.offset_21|) 0) (< |v_ULTIMATE.start_loop_~x#1.offset_21| 0))) (forall ((v_ArrVal_820 (Array Int Int)) (|v_ULTIMATE.start_loop_~x#1.offset_21| Int) (v_ArrVal_823 Int)) (or (< |c_ULTIMATE.start_create_~sll~1#1.offset| |v_ULTIMATE.start_loop_~x#1.offset_21|) (= (select (select (let ((.cse2 (store |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_create_internal_~now~0#1.base| v_ArrVal_820))) (store .cse2 |c_ULTIMATE.start_create_~now~1#1.base| (store (select .cse2 |c_ULTIMATE.start_create_~now~1#1.base|) .cse1 v_ArrVal_823))) |c_ULTIMATE.start_create_~sll~1#1.base|) |v_ULTIMATE.start_loop_~x#1.offset_21|) 0) (< |v_ULTIMATE.start_loop_~x#1.offset_21| 0))))) is different from false [2024-11-28 05:01:31,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050352750] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:01:31,099 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 05:01:31,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 40 [2024-11-28 05:01:31,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761457345] [2024-11-28 05:01:31,099 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 05:01:31,099 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-11-28 05:01:31,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:01:31,100 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-11-28 05:01:31,100 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1751, Unknown=2, NotChecked=170, Total=2070 [2024-11-28 05:01:31,101 INFO L87 Difference]: Start difference. First operand 135 states and 153 transitions. Second operand has 40 states, 38 states have (on average 1.7894736842105263) internal successors, (68), 32 states have internal predecessors, (68), 5 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-28 05:01:32,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:01:32,434 INFO L93 Difference]: Finished difference Result 156 states and 179 transitions. [2024-11-28 05:01:32,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-28 05:01:32,434 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 38 states have (on average 1.7894736842105263) internal successors, (68), 32 states have internal predecessors, (68), 5 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 43 [2024-11-28 05:01:32,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:01:32,436 INFO L225 Difference]: With dead ends: 156 [2024-11-28 05:01:32,436 INFO L226 Difference]: Without dead ends: 156 [2024-11-28 05:01:32,436 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=232, Invalid=2744, Unknown=2, NotChecked=214, Total=3192 [2024-11-28 05:01:32,437 INFO L435 NwaCegarLoop]: 63 mSDtfsCounter, 41 mSDsluCounter, 1354 mSDsCounter, 0 mSdLazyCounter, 1074 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 1417 SdHoareTripleChecker+Invalid, 1209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1074 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-28 05:01:32,437 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 1417 Invalid, 1209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1074 Invalid, 0 Unknown, 111 Unchecked, 0.8s Time] [2024-11-28 05:01:32,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2024-11-28 05:01:32,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 153. [2024-11-28 05:01:32,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 129 states have (on average 1.255813953488372) internal successors, (162), 144 states have internal predecessors, (162), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-28 05:01:32,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 174 transitions. [2024-11-28 05:01:32,448 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 174 transitions. Word has length 43 [2024-11-28 05:01:32,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:01:32,448 INFO L471 AbstractCegarLoop]: Abstraction has 153 states and 174 transitions. [2024-11-28 05:01:32,448 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 38 states have (on average 1.7894736842105263) internal successors, (68), 32 states have internal predecessors, (68), 5 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-28 05:01:32,449 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 174 transitions. [2024-11-28 05:01:32,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-28 05:01:32,449 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:01:32,449 INFO L218 NwaCegarLoop]: trace histogram [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] [2024-11-28 05:01:32,460 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-28 05:01:32,650 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-28 05:01:32,650 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-28 05:01:32,650 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:01:32,650 INFO L85 PathProgramCache]: Analyzing trace with hash -552360766, now seen corresponding path program 1 times [2024-11-28 05:01:32,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:01:32,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169320707] [2024-11-28 05:01:32,651 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:01:32,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:01:32,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:01:34,173 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:01:34,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:01:34,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169320707] [2024-11-28 05:01:34,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169320707] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:01:34,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:01:34,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2024-11-28 05:01:34,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072509319] [2024-11-28 05:01:34,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:01:34,174 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-28 05:01:34,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:01:34,175 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-28 05:01:34,175 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=645, Unknown=0, NotChecked=0, Total=702 [2024-11-28 05:01:34,175 INFO L87 Difference]: Start difference. First operand 153 states and 174 transitions. Second operand has 27 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 24 states have internal predecessors, (38), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 05:01:35,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:01:35,362 INFO L93 Difference]: Finished difference Result 164 states and 187 transitions. [2024-11-28 05:01:35,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-28 05:01:35,363 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 24 states have internal predecessors, (38), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 42 [2024-11-28 05:01:35,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:01:35,364 INFO L225 Difference]: With dead ends: 164 [2024-11-28 05:01:35,364 INFO L226 Difference]: Without dead ends: 164 [2024-11-28 05:01:35,364 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=113, Invalid=1147, Unknown=0, NotChecked=0, Total=1260 [2024-11-28 05:01:35,365 INFO L435 NwaCegarLoop]: 51 mSDtfsCounter, 27 mSDsluCounter, 825 mSDsCounter, 0 mSdLazyCounter, 1042 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 876 SdHoareTripleChecker+Invalid, 1053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1042 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-28 05:01:35,365 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 876 Invalid, 1053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1042 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-28 05:01:35,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2024-11-28 05:01:35,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 155. [2024-11-28 05:01:35,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 131 states have (on average 1.251908396946565) internal successors, (164), 146 states have internal predecessors, (164), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-28 05:01:35,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 176 transitions. [2024-11-28 05:01:35,375 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 176 transitions. Word has length 42 [2024-11-28 05:01:35,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:01:35,375 INFO L471 AbstractCegarLoop]: Abstraction has 155 states and 176 transitions. [2024-11-28 05:01:35,375 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 24 states have internal predecessors, (38), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 05:01:35,375 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 176 transitions. [2024-11-28 05:01:35,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-28 05:01:35,376 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:01:35,376 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:01:35,380 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-11-28 05:01:35,380 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-28 05:01:35,380 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:01:35,380 INFO L85 PathProgramCache]: Analyzing trace with hash -2036932942, now seen corresponding path program 1 times [2024-11-28 05:01:35,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:01:35,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236382371] [2024-11-28 05:01:35,380 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:01:35,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:01:35,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:01:35,637 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:01:35,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:01:35,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236382371] [2024-11-28 05:01:35,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236382371] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:01:35,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552056631] [2024-11-28 05:01:35,638 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:01:35,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:01:35,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:01:35,641 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:01:35,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-28 05:01:35,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:01:35,792 INFO L256 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-28 05:01:35,795 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:01:35,907 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base Int)) (and (= (select |c_old(#valid)| alloc_and_zero_~pi~0.base) 0) (= (store |c_old(#length)| alloc_and_zero_~pi~0.base (select |c_#length| alloc_and_zero_~pi~0.base)) |c_#length|))) is different from true [2024-11-28 05:01:35,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 05:01:35,935 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 05:01:35,947 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-28 05:01:35,947 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 05:01:36,086 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:01:36,086 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:01:36,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552056631] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:01:36,304 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 05:01:36,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2024-11-28 05:01:36,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635352148] [2024-11-28 05:01:36,304 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 05:01:36,305 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-28 05:01:36,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:01:36,306 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-28 05:01:36,306 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=403, Unknown=1, NotChecked=40, Total=506 [2024-11-28 05:01:36,307 INFO L87 Difference]: Start difference. First operand 155 states and 176 transitions. Second operand has 18 states, 17 states have (on average 3.823529411764706) internal successors, (65), 15 states have internal predecessors, (65), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-28 05:01:36,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:01:36,742 INFO L93 Difference]: Finished difference Result 156 states and 177 transitions. [2024-11-28 05:01:36,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 05:01:36,743 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.823529411764706) internal successors, (65), 15 states have internal predecessors, (65), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 44 [2024-11-28 05:01:36,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:01:36,744 INFO L225 Difference]: With dead ends: 156 [2024-11-28 05:01:36,744 INFO L226 Difference]: Without dead ends: 156 [2024-11-28 05:01:36,744 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=704, Unknown=3, NotChecked=54, Total=870 [2024-11-28 05:01:36,744 INFO L435 NwaCegarLoop]: 67 mSDtfsCounter, 22 mSDsluCounter, 680 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 747 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 05:01:36,744 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 747 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 400 Invalid, 0 Unknown, 100 Unchecked, 0.3s Time] [2024-11-28 05:01:36,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2024-11-28 05:01:36,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 155. [2024-11-28 05:01:36,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 131 states have (on average 1.2442748091603053) internal successors, (163), 146 states have internal predecessors, (163), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-28 05:01:36,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 175 transitions. [2024-11-28 05:01:36,750 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 175 transitions. Word has length 44 [2024-11-28 05:01:36,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:01:36,750 INFO L471 AbstractCegarLoop]: Abstraction has 155 states and 175 transitions. [2024-11-28 05:01:36,750 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.823529411764706) internal successors, (65), 15 states have internal predecessors, (65), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-28 05:01:36,750 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 175 transitions. [2024-11-28 05:01:36,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-28 05:01:36,751 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:01:36,751 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:01:36,762 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-28 05:01:36,955 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-28 05:01:36,955 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-28 05:01:36,955 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:01:36,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1757323857, now seen corresponding path program 1 times [2024-11-28 05:01:36,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:01:36,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623207944] [2024-11-28 05:01:36,956 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:01:36,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:01:36,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:01:37,708 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:01:37,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:01:37,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623207944] [2024-11-28 05:01:37,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623207944] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:01:37,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635757273] [2024-11-28 05:01:37,709 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:01:37,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:01:37,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:01:37,711 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:01:37,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-28 05:01:37,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:01:37,847 INFO L256 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-11-28 05:01:37,849 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:01:37,852 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 05:01:37,992 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-28 05:01:37,992 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 05:01:38,166 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-11-28 05:01:38,321 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 20 treesize of output 8 [2024-11-28 05:01:38,424 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 14 treesize of output 9 [2024-11-28 05:01:38,431 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:01:38,431 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:01:38,536 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 6 treesize of output 4 [2024-11-28 05:01:38,565 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 32 treesize of output 26 [2024-11-28 05:01:38,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635757273] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:01:38,696 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 05:01:38,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 35 [2024-11-28 05:01:38,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989530041] [2024-11-28 05:01:38,696 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 05:01:38,696 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-28 05:01:38,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:01:38,697 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-28 05:01:38,697 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1235, Unknown=0, NotChecked=0, Total=1332 [2024-11-28 05:01:38,698 INFO L87 Difference]: Start difference. First operand 155 states and 175 transitions. Second operand has 36 states, 33 states have (on average 2.212121212121212) internal successors, (73), 31 states have internal predecessors, (73), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-28 05:01:39,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:01:39,554 INFO L93 Difference]: Finished difference Result 207 states and 232 transitions. [2024-11-28 05:01:39,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-28 05:01:39,554 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 33 states have (on average 2.212121212121212) internal successors, (73), 31 states have internal predecessors, (73), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 44 [2024-11-28 05:01:39,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:01:39,556 INFO L225 Difference]: With dead ends: 207 [2024-11-28 05:01:39,556 INFO L226 Difference]: Without dead ends: 207 [2024-11-28 05:01:39,556 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=137, Invalid=1585, Unknown=0, NotChecked=0, Total=1722 [2024-11-28 05:01:39,556 INFO L435 NwaCegarLoop]: 46 mSDtfsCounter, 99 mSDsluCounter, 933 mSDsCounter, 0 mSdLazyCounter, 1277 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 979 SdHoareTripleChecker+Invalid, 1288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-28 05:01:39,557 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 979 Invalid, 1288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1277 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-28 05:01:39,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2024-11-28 05:01:39,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 162. [2024-11-28 05:01:39,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 138 states have (on average 1.2681159420289856) internal successors, (175), 153 states have internal predecessors, (175), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-28 05:01:39,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 187 transitions. [2024-11-28 05:01:39,561 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 187 transitions. Word has length 44 [2024-11-28 05:01:39,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:01:39,562 INFO L471 AbstractCegarLoop]: Abstraction has 162 states and 187 transitions. [2024-11-28 05:01:39,562 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 33 states have (on average 2.212121212121212) internal successors, (73), 31 states have internal predecessors, (73), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-28 05:01:39,562 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 187 transitions. [2024-11-28 05:01:39,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-28 05:01:39,563 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:01:39,563 INFO L218 NwaCegarLoop]: trace histogram [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] [2024-11-28 05:01:39,573 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-28 05:01:39,767 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-28 05:01:39,767 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-28 05:01:39,767 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:01:39,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1839883889, now seen corresponding path program 1 times [2024-11-28 05:01:39,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:01:39,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293589626] [2024-11-28 05:01:39,768 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:01:39,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:01:39,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:01:39,993 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:01:39,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:01:39,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293589626] [2024-11-28 05:01:39,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293589626] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:01:39,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847750496] [2024-11-28 05:01:39,994 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:01:39,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:01:39,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:01:39,996 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:01:39,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-28 05:01:40,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:01:40,159 INFO L256 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-28 05:01:40,162 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:01:40,432 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-28 05:01:40,555 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:01:40,556 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 [2024-11-28 05:01:40,693 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:01:40,694 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 05:01:40,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847750496] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:01:40,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 05:01:40,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [10] total 28 [2024-11-28 05:01:40,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518238920] [2024-11-28 05:01:40,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:01:40,694 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-28 05:01:40,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:01:40,695 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-28 05:01:40,695 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=694, Unknown=0, NotChecked=0, Total=756 [2024-11-28 05:01:40,696 INFO L87 Difference]: Start difference. First operand 162 states and 187 transitions. Second operand has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 05:01:41,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:01:41,143 INFO L93 Difference]: Finished difference Result 191 states and 215 transitions. [2024-11-28 05:01:41,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-28 05:01:41,144 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2024-11-28 05:01:41,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:01:41,145 INFO L225 Difference]: With dead ends: 191 [2024-11-28 05:01:41,145 INFO L226 Difference]: Without dead ends: 186 [2024-11-28 05:01:41,145 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2024-11-28 05:01:41,146 INFO L435 NwaCegarLoop]: 52 mSDtfsCounter, 66 mSDsluCounter, 720 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 772 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 05:01:41,146 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 772 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 604 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 05:01:41,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2024-11-28 05:01:41,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 162. [2024-11-28 05:01:41,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 138 states have (on average 1.2536231884057971) internal successors, (173), 153 states have internal predecessors, (173), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-28 05:01:41,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 185 transitions. [2024-11-28 05:01:41,152 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 185 transitions. Word has length 44 [2024-11-28 05:01:41,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:01:41,152 INFO L471 AbstractCegarLoop]: Abstraction has 162 states and 185 transitions. [2024-11-28 05:01:41,152 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 05:01:41,152 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 185 transitions. [2024-11-28 05:01:41,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-28 05:01:41,157 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:01:41,157 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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 05:01:41,167 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-28 05:01:41,357 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:01:41,358 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-28 05:01:41,358 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:01:41,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1170276155, now seen corresponding path program 1 times [2024-11-28 05:01:41,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:01:41,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518913944] [2024-11-28 05:01:41,358 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:01:41,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:01:41,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:01:41,808 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:01:41,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:01:41,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518913944] [2024-11-28 05:01:41,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518913944] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:01:41,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192397223] [2024-11-28 05:01:41,809 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:01:41,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:01:41,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:01:41,811 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:01:41,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-28 05:01:41,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:01:41,973 INFO L256 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-28 05:01:41,975 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:01:42,014 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-28 05:01:42,015 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 05:01:42,038 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-28 05:01:42,098 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-28 05:01:42,098 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2024-11-28 05:01:42,113 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 25 treesize of output 13 [2024-11-28 05:01:42,129 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base Int)) (and (= (select |c_old(#valid)| alloc_and_zero_~pi~0.base) 0) (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_~pi~0.base (select |c_#valid| alloc_and_zero_~pi~0.base))))) is different from true [2024-11-28 05:01:42,168 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-28 05:01:42,168 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-28 05:01:42,171 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 5 not checked. [2024-11-28 05:01:42,171 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:01:42,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192397223] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:01:42,236 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 05:01:42,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 21 [2024-11-28 05:01:42,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322740130] [2024-11-28 05:01:42,236 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 05:01:42,237 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-28 05:01:42,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:01:42,237 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-28 05:01:42,237 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=406, Unknown=1, NotChecked=40, Total=506 [2024-11-28 05:01:42,237 INFO L87 Difference]: Start difference. First operand 162 states and 185 transitions. Second operand has 22 states, 21 states have (on average 2.761904761904762) internal successors, (58), 19 states have internal predecessors, (58), 3 states have call successors, (4), 2 states have call predecessors, (4), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-28 05:01:42,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:01:42,627 INFO L93 Difference]: Finished difference Result 161 states and 184 transitions. [2024-11-28 05:01:42,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 05:01:42,628 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.761904761904762) internal successors, (58), 19 states have internal predecessors, (58), 3 states have call successors, (4), 2 states have call predecessors, (4), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 48 [2024-11-28 05:01:42,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:01:42,629 INFO L225 Difference]: With dead ends: 161 [2024-11-28 05:01:42,629 INFO L226 Difference]: Without dead ends: 161 [2024-11-28 05:01:42,629 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=98, Invalid=607, Unknown=1, NotChecked=50, Total=756 [2024-11-28 05:01:42,629 INFO L435 NwaCegarLoop]: 67 mSDtfsCounter, 11 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 709 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 05:01:42,629 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 709 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 389 Invalid, 0 Unknown, 77 Unchecked, 0.3s Time] [2024-11-28 05:01:42,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2024-11-28 05:01:42,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2024-11-28 05:01:42,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 138 states have (on average 1.2463768115942029) internal successors, (172), 152 states have internal predecessors, (172), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-28 05:01:42,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 184 transitions. [2024-11-28 05:01:42,633 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 184 transitions. Word has length 48 [2024-11-28 05:01:42,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:01:42,633 INFO L471 AbstractCegarLoop]: Abstraction has 161 states and 184 transitions. [2024-11-28 05:01:42,634 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.761904761904762) internal successors, (58), 19 states have internal predecessors, (58), 3 states have call successors, (4), 2 states have call predecessors, (4), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-28 05:01:42,634 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 184 transitions. [2024-11-28 05:01:42,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-28 05:01:42,635 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:01:42,635 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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 05:01:42,645 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-28 05:01:42,839 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:01:42,839 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-28 05:01:42,839 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:01:42,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1170276156, now seen corresponding path program 1 times [2024-11-28 05:01:42,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:01:42,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548339452] [2024-11-28 05:01:42,840 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:01:42,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:01:42,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:01:43,448 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:01:43,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:01:43,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548339452] [2024-11-28 05:01:43,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548339452] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:01:43,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190582847] [2024-11-28 05:01:43,449 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:01:43,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:01:43,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:01:43,451 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:01:43,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-28 05:01:43,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:01:43,610 INFO L256 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-28 05:01:43,613 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:01:43,643 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 05:01:43,672 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-28 05:01:43,673 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 05:01:43,689 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 11 treesize of output 7 [2024-11-28 05:01:43,695 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-28 05:01:43,753 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-28 05:01:43,754 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 52 [2024-11-28 05:01:43,765 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 24 treesize of output 11 [2024-11-28 05:01:43,818 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 34 treesize of output 18 [2024-11-28 05:01:43,825 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2024-11-28 05:01:43,930 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base Int)) (and (= (select |c_old(#valid)| alloc_and_zero_~pi~0.base) 0) (= (store |c_old(#length)| alloc_and_zero_~pi~0.base (select |c_#length| alloc_and_zero_~pi~0.base)) |c_#length|))) is different from true [2024-11-28 05:01:43,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 05:01:43,960 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 14 treesize of output 9 [2024-11-28 05:01:43,968 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-28 05:01:43,969 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 05:01:43,973 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2024-11-28 05:01:43,974 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:01:44,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190582847] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:01:44,124 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 05:01:44,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 23 [2024-11-28 05:01:44,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083907144] [2024-11-28 05:01:44,124 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 05:01:44,125 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-28 05:01:44,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:01:44,125 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-28 05:01:44,126 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=532, Unknown=1, NotChecked=46, Total=650 [2024-11-28 05:01:44,126 INFO L87 Difference]: Start difference. First operand 161 states and 184 transitions. Second operand has 24 states, 23 states have (on average 2.608695652173913) internal successors, (60), 20 states have internal predecessors, (60), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-28 05:01:44,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:01:44,654 INFO L93 Difference]: Finished difference Result 158 states and 181 transitions. [2024-11-28 05:01:44,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-28 05:01:44,655 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.608695652173913) internal successors, (60), 20 states have internal predecessors, (60), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Word has length 48 [2024-11-28 05:01:44,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:01:44,655 INFO L225 Difference]: With dead ends: 158 [2024-11-28 05:01:44,656 INFO L226 Difference]: Without dead ends: 158 [2024-11-28 05:01:44,656 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=150, Invalid=975, Unknown=1, NotChecked=64, Total=1190 [2024-11-28 05:01:44,657 INFO L435 NwaCegarLoop]: 76 mSDtfsCounter, 20 mSDsluCounter, 733 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 809 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 05:01:44,657 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 809 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 425 Invalid, 0 Unknown, 87 Unchecked, 0.3s Time] [2024-11-28 05:01:44,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2024-11-28 05:01:44,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2024-11-28 05:01:44,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 138 states have (on average 1.2246376811594204) internal successors, (169), 149 states have internal predecessors, (169), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-28 05:01:44,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 181 transitions. [2024-11-28 05:01:44,663 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 181 transitions. Word has length 48 [2024-11-28 05:01:44,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:01:44,663 INFO L471 AbstractCegarLoop]: Abstraction has 158 states and 181 transitions. [2024-11-28 05:01:44,664 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.608695652173913) internal successors, (60), 20 states have internal predecessors, (60), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-28 05:01:44,664 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 181 transitions. [2024-11-28 05:01:44,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-28 05:01:44,664 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:01:44,664 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:01:44,674 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-28 05:01:44,865 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:01:44,865 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-28 05:01:44,865 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:01:44,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1323677645, now seen corresponding path program 1 times [2024-11-28 05:01:44,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:01:44,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830680875] [2024-11-28 05:01:44,866 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:01:44,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:01:44,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:01:45,286 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:01:45,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:01:45,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830680875] [2024-11-28 05:01:45,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830680875] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:01:45,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924261503] [2024-11-28 05:01:45,287 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:01:45,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:01:45,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:01:45,289 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:01:45,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-28 05:01:45,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:01:45,455 INFO L256 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-11-28 05:01:45,459 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:01:45,679 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-28 05:01:45,679 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 05:01:45,716 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-28 05:01:45,813 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-28 05:01:45,813 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2024-11-28 05:01:46,048 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 25 treesize of output 13 [2024-11-28 05:01:46,053 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:01:46,053 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:01:46,188 INFO L349 Elim1Store]: treesize reduction 5, result has 66.7 percent of original size [2024-11-28 05:01:46,188 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 19 treesize of output 18 [2024-11-28 05:01:46,274 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:01:46,276 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2024-11-28 05:01:46,284 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:01:46,284 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 30 treesize of output 33 [2024-11-28 05:01:46,288 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 5 treesize of output 3 [2024-11-28 05:01:46,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924261503] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:01:46,412 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 05:01:46,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 30 [2024-11-28 05:01:46,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673760310] [2024-11-28 05:01:46,412 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 05:01:46,413 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-28 05:01:46,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:01:46,413 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-28 05:01:46,414 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1276, Unknown=2, NotChecked=0, Total=1406 [2024-11-28 05:01:46,414 INFO L87 Difference]: Start difference. First operand 158 states and 181 transitions. Second operand has 31 states, 30 states have (on average 2.4) internal successors, (72), 27 states have internal predecessors, (72), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-28 05:01:46,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:01:46,940 INFO L93 Difference]: Finished difference Result 162 states and 188 transitions. [2024-11-28 05:01:46,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-28 05:01:46,940 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.4) internal successors, (72), 27 states have internal predecessors, (72), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 47 [2024-11-28 05:01:46,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:01:46,941 INFO L225 Difference]: With dead ends: 162 [2024-11-28 05:01:46,941 INFO L226 Difference]: Without dead ends: 162 [2024-11-28 05:01:46,942 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=179, Invalid=1625, Unknown=2, NotChecked=0, Total=1806 [2024-11-28 05:01:46,942 INFO L435 NwaCegarLoop]: 68 mSDtfsCounter, 21 mSDsluCounter, 931 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 999 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 05:01:46,943 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 999 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 654 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 05:01:46,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2024-11-28 05:01:46,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 161. [2024-11-28 05:01:46,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 141 states have (on average 1.2340425531914894) internal successors, (174), 152 states have internal predecessors, (174), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-28 05:01:46,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 186 transitions. [2024-11-28 05:01:46,951 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 186 transitions. Word has length 47 [2024-11-28 05:01:46,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:01:46,952 INFO L471 AbstractCegarLoop]: Abstraction has 161 states and 186 transitions. [2024-11-28 05:01:46,952 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.4) internal successors, (72), 27 states have internal predecessors, (72), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-28 05:01:46,952 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 186 transitions. [2024-11-28 05:01:46,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-28 05:01:46,954 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:01:46,954 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:01:46,964 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-28 05:01:47,154 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-11-28 05:01:47,155 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-28 05:01:47,155 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:01:47,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1323677646, now seen corresponding path program 1 times [2024-11-28 05:01:47,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:01:47,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451968178] [2024-11-28 05:01:47,155 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:01:47,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:01:47,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:01:47,733 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:01:47,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:01:47,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451968178] [2024-11-28 05:01:47,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451968178] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:01:47,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609663265] [2024-11-28 05:01:47,733 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:01:47,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:01:47,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:01:47,736 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:01:47,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-28 05:01:47,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:01:47,908 INFO L256 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-11-28 05:01:47,911 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:01:47,965 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 05:01:48,064 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-28 05:01:48,064 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 05:01:48,106 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 11 treesize of output 7 [2024-11-28 05:01:48,113 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-28 05:01:48,199 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-28 05:01:48,199 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 45 [2024-11-28 05:01:48,207 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 24 treesize of output 11 [2024-11-28 05:01:48,327 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 25 treesize of output 13 [2024-11-28 05:01:48,331 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2024-11-28 05:01:48,381 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:01:48,381 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:01:48,574 WARN L851 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1383 (Array Int Int))) (<= 0 (select (select (store |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_create_#t~mem13#1.base| v_ArrVal_1383) |c_ULTIMATE.start_create_~sll~1#1.base|) |c_ULTIMATE.start_create_~sll~1#1.offset|))) (forall ((v_ArrVal_1384 (Array Int Int)) (v_ArrVal_1383 (Array Int Int))) (<= (+ (select (select (store |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_create_#t~mem13#1.base| v_ArrVal_1383) |c_ULTIMATE.start_create_~sll~1#1.base|) |c_ULTIMATE.start_create_~sll~1#1.offset|) 8) (select |c_#length| (select (select (store |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_create_#t~mem13#1.base| v_ArrVal_1384) |c_ULTIMATE.start_create_~sll~1#1.base|) |c_ULTIMATE.start_create_~sll~1#1.offset|))))) is different from false [2024-11-28 05:01:48,585 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_create_~now~1#1.base|) |c_ULTIMATE.start_create_~now~1#1.offset|))) (and (forall ((v_ArrVal_1384 (Array Int Int)) (v_ArrVal_1383 (Array Int Int))) (<= (+ (select (select (store |c_#memory_$Pointer$#0.offset| .cse0 v_ArrVal_1383) |c_ULTIMATE.start_create_~sll~1#1.base|) |c_ULTIMATE.start_create_~sll~1#1.offset|) 8) (select |c_#length| (select (select (store |c_#memory_$Pointer$#0.base| .cse0 v_ArrVal_1384) |c_ULTIMATE.start_create_~sll~1#1.base|) |c_ULTIMATE.start_create_~sll~1#1.offset|)))) (forall ((v_ArrVal_1383 (Array Int Int))) (<= 0 (select (select (store |c_#memory_$Pointer$#0.offset| .cse0 v_ArrVal_1383) |c_ULTIMATE.start_create_~sll~1#1.base|) |c_ULTIMATE.start_create_~sll~1#1.offset|))))) is different from false [2024-11-28 05:01:48,599 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:01:48,599 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2024-11-28 05:01:48,607 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:01:48,608 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 34 treesize of output 37 [2024-11-28 05:01:48,624 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 5 treesize of output 3 [2024-11-28 05:01:48,631 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:01:48,632 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 38 [2024-11-28 05:01:48,639 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:01:48,639 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2024-11-28 05:01:48,642 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 05:01:48,645 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2024-11-28 05:01:48,648 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 05:01:48,651 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2024-11-28 05:01:48,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609663265] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:01:48,801 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 05:01:48,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 25 [2024-11-28 05:01:48,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309272896] [2024-11-28 05:01:48,801 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 05:01:48,801 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-28 05:01:48,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:01:48,802 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-28 05:01:48,802 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=955, Unknown=2, NotChecked=126, Total=1190 [2024-11-28 05:01:48,802 INFO L87 Difference]: Start difference. First operand 161 states and 186 transitions. Second operand has 26 states, 25 states have (on average 2.48) internal successors, (62), 23 states have internal predecessors, (62), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-28 05:01:49,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:01:49,496 INFO L93 Difference]: Finished difference Result 162 states and 187 transitions. [2024-11-28 05:01:49,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-28 05:01:49,497 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.48) internal successors, (62), 23 states have internal predecessors, (62), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 47 [2024-11-28 05:01:49,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:01:49,498 INFO L225 Difference]: With dead ends: 162 [2024-11-28 05:01:49,498 INFO L226 Difference]: Without dead ends: 162 [2024-11-28 05:01:49,498 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=150, Invalid=1262, Unknown=2, NotChecked=146, Total=1560 [2024-11-28 05:01:49,499 INFO L435 NwaCegarLoop]: 72 mSDtfsCounter, 17 mSDsluCounter, 1077 mSDsCounter, 0 mSdLazyCounter, 771 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 1149 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 771 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-28 05:01:49,499 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 1149 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 771 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-28 05:01:49,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2024-11-28 05:01:49,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 161. [2024-11-28 05:01:49,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 141 states have (on average 1.2269503546099292) internal successors, (173), 152 states have internal predecessors, (173), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-28 05:01:49,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 185 transitions. [2024-11-28 05:01:49,504 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 185 transitions. Word has length 47 [2024-11-28 05:01:49,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:01:49,504 INFO L471 AbstractCegarLoop]: Abstraction has 161 states and 185 transitions. [2024-11-28 05:01:49,504 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.48) internal successors, (62), 23 states have internal predecessors, (62), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-28 05:01:49,505 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 185 transitions. [2024-11-28 05:01:49,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-28 05:01:49,506 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:01:49,506 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:01:49,519 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-28 05:01:49,707 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-11-28 05:01:49,707 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-28 05:01:49,707 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:01:49,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1589553422, now seen corresponding path program 1 times [2024-11-28 05:01:49,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:01:49,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014182778] [2024-11-28 05:01:49,707 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:01:49,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:01:49,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:01:50,195 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 05:01:50,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:01:50,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014182778] [2024-11-28 05:01:50,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014182778] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:01:50,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624576234] [2024-11-28 05:01:50,196 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:01:50,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:01:50,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:01:50,198 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:01:50,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-28 05:01:50,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:01:50,376 INFO L256 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-11-28 05:01:50,378 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:01:50,696 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 19 treesize of output 1 [2024-11-28 05:01:50,806 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 17 treesize of output 9 [2024-11-28 05:01:50,811 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-28 05:01:50,811 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:01:50,984 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 34 treesize of output 28 [2024-11-28 05:01:51,252 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:01:51,252 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 34 treesize of output 52 [2024-11-28 05:01:51,410 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-28 05:01:51,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624576234] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:01:51,410 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:01:51,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 13] total 37 [2024-11-28 05:01:51,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434541122] [2024-11-28 05:01:51,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:01:51,411 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-28 05:01:51,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:01:51,412 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-28 05:01:51,412 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1273, Unknown=0, NotChecked=0, Total=1406 [2024-11-28 05:01:51,412 INFO L87 Difference]: Start difference. First operand 161 states and 185 transitions. Second operand has 38 states, 37 states have (on average 2.4594594594594597) internal successors, (91), 36 states have internal predecessors, (91), 7 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2024-11-28 05:01:52,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:01:52,027 INFO L93 Difference]: Finished difference Result 176 states and 202 transitions. [2024-11-28 05:01:52,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-28 05:01:52,028 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.4594594594594597) internal successors, (91), 36 states have internal predecessors, (91), 7 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) Word has length 48 [2024-11-28 05:01:52,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:01:52,030 INFO L225 Difference]: With dead ends: 176 [2024-11-28 05:01:52,030 INFO L226 Difference]: Without dead ends: 176 [2024-11-28 05:01:52,030 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=160, Invalid=1562, Unknown=0, NotChecked=0, Total=1722 [2024-11-28 05:01:52,031 INFO L435 NwaCegarLoop]: 77 mSDtfsCounter, 81 mSDsluCounter, 1122 mSDsCounter, 0 mSdLazyCounter, 892 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 1199 SdHoareTripleChecker+Invalid, 897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 892 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-28 05:01:52,031 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 1199 Invalid, 897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 892 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-28 05:01:52,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2024-11-28 05:01:52,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 167. [2024-11-28 05:01:52,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 147 states have (on average 1.2244897959183674) internal successors, (180), 158 states have internal predecessors, (180), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-28 05:01:52,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 192 transitions. [2024-11-28 05:01:52,036 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 192 transitions. Word has length 48 [2024-11-28 05:01:52,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:01:52,036 INFO L471 AbstractCegarLoop]: Abstraction has 167 states and 192 transitions. [2024-11-28 05:01:52,036 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.4594594594594597) internal successors, (91), 36 states have internal predecessors, (91), 7 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2024-11-28 05:01:52,036 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 192 transitions. [2024-11-28 05:01:52,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-28 05:01:52,037 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:01:52,038 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:01:52,048 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-28 05:01:52,242 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-11-28 05:01:52,242 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-28 05:01:52,242 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:01:52,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1589553421, now seen corresponding path program 1 times [2024-11-28 05:01:52,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:01:52,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161900987] [2024-11-28 05:01:52,242 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:01:52,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:01:52,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:01:53,112 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:01:53,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:01:53,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161900987] [2024-11-28 05:01:53,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161900987] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:01:53,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856575986] [2024-11-28 05:01:53,113 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:01:53,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:01:53,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:01:53,115 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:01:53,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-28 05:01:53,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:01:53,288 INFO L256 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 65 conjuncts are in the unsatisfiable core [2024-11-28 05:01:53,290 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:01:53,630 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 19 treesize of output 1 [2024-11-28 05:01:53,636 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 19 treesize of output 1 [2024-11-28 05:01:53,805 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 29 treesize of output 17 [2024-11-28 05:01:53,807 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 32 treesize of output 14 [2024-11-28 05:01:53,881 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 05:01:53,881 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:01:53,938 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 70 treesize of output 64 [2024-11-28 05:01:53,941 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 94 treesize of output 82 [2024-11-28 05:01:53,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 05:01:53,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 05:01:54,025 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:01:54,025 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 25 treesize of output 29 [2024-11-28 05:01:54,165 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 05:01:54,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856575986] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:01:54,165 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:01:54,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 15, 15] total 37 [2024-11-28 05:01:54,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051985879] [2024-11-28 05:01:54,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:01:54,166 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-28 05:01:54,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:01:54,167 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-28 05:01:54,167 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1294, Unknown=0, NotChecked=0, Total=1406 [2024-11-28 05:01:54,167 INFO L87 Difference]: Start difference. First operand 167 states and 192 transitions. Second operand has 38 states, 35 states have (on average 2.342857142857143) internal successors, (82), 34 states have internal predecessors, (82), 5 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-28 05:01:55,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:01:55,124 INFO L93 Difference]: Finished difference Result 192 states and 222 transitions. [2024-11-28 05:01:55,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-28 05:01:55,124 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 35 states have (on average 2.342857142857143) internal successors, (82), 34 states have internal predecessors, (82), 5 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 48 [2024-11-28 05:01:55,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:01:55,125 INFO L225 Difference]: With dead ends: 192 [2024-11-28 05:01:55,125 INFO L226 Difference]: Without dead ends: 192 [2024-11-28 05:01:55,126 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=176, Invalid=2080, Unknown=0, NotChecked=0, Total=2256 [2024-11-28 05:01:55,126 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 85 mSDsluCounter, 927 mSDsCounter, 0 mSdLazyCounter, 1062 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 972 SdHoareTripleChecker+Invalid, 1076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-28 05:01:55,126 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 972 Invalid, 1076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1062 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-28 05:01:55,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2024-11-28 05:01:55,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 169. [2024-11-28 05:01:55,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 149 states have (on average 1.2147651006711409) internal successors, (181), 160 states have internal predecessors, (181), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-28 05:01:55,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 193 transitions. [2024-11-28 05:01:55,135 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 193 transitions. Word has length 48 [2024-11-28 05:01:55,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:01:55,135 INFO L471 AbstractCegarLoop]: Abstraction has 169 states and 193 transitions. [2024-11-28 05:01:55,135 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 35 states have (on average 2.342857142857143) internal successors, (82), 34 states have internal predecessors, (82), 5 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-28 05:01:55,136 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 193 transitions. [2024-11-28 05:01:55,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-28 05:01:55,136 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:01:55,136 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:01:55,149 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-28 05:01:55,337 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-11-28 05:01:55,337 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-28 05:01:55,337 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:01:55,338 INFO L85 PathProgramCache]: Analyzing trace with hash 743965620, now seen corresponding path program 1 times [2024-11-28 05:01:55,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:01:55,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296407171] [2024-11-28 05:01:55,338 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:01:55,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:01:55,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:01:55,737 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:01:55,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:01:55,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296407171] [2024-11-28 05:01:55,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296407171] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:01:55,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526566558] [2024-11-28 05:01:55,737 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:01:55,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:01:55,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:01:55,740 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:01:55,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-28 05:01:55,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:01:55,932 INFO L256 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-11-28 05:01:55,935 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:01:56,178 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 15 treesize of output 1 [2024-11-28 05:01:56,183 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-28 05:01:56,240 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 15 treesize of output 7 [2024-11-28 05:01:56,286 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-28 05:01:56,286 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 17 treesize of output 16 [2024-11-28 05:01:56,295 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 6 treesize of output 4 [2024-11-28 05:01:56,516 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 05:01:56,518 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:01:56,518 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 28 treesize of output 23 [2024-11-28 05:01:56,647 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 05:01:56,647 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:01:57,078 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:01:57,078 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 15 treesize of output 19 [2024-11-28 05:01:57,535 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:01:57,535 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 20 [2024-11-28 05:01:57,542 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 05:01:57,548 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:01:57,548 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 1 case distinctions, treesize of input 17 treesize of output 20 [2024-11-28 05:01:57,578 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:01:57,578 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 20 [2024-11-28 05:01:57,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 05:01:57,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 05:01:57,586 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2024-11-28 05:01:57,592 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 18 [2024-11-28 05:01:57,989 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 05:01:57,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526566558] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:01:57,989 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:01:57,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 40 [2024-11-28 05:01:57,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987937511] [2024-11-28 05:01:57,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:01:57,990 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-28 05:01:57,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:01:57,991 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-28 05:01:57,991 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1504, Unknown=2, NotChecked=0, Total=1640 [2024-11-28 05:01:57,991 INFO L87 Difference]: Start difference. First operand 169 states and 193 transitions. Second operand has 41 states, 40 states have (on average 2.6) internal successors, (104), 36 states have internal predecessors, (104), 5 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-28 05:01:58,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:01:58,933 INFO L93 Difference]: Finished difference Result 169 states and 195 transitions. [2024-11-28 05:01:58,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-28 05:01:58,934 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 2.6) internal successors, (104), 36 states have internal predecessors, (104), 5 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) Word has length 49 [2024-11-28 05:01:58,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:01:58,935 INFO L225 Difference]: With dead ends: 169 [2024-11-28 05:01:58,935 INFO L226 Difference]: Without dead ends: 169 [2024-11-28 05:01:58,935 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=197, Invalid=1963, Unknown=2, NotChecked=0, Total=2162 [2024-11-28 05:01:58,936 INFO L435 NwaCegarLoop]: 53 mSDtfsCounter, 62 mSDsluCounter, 1204 mSDsCounter, 0 mSdLazyCounter, 885 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 1257 SdHoareTripleChecker+Invalid, 897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 885 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-28 05:01:58,936 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 1257 Invalid, 897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 885 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-28 05:01:58,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2024-11-28 05:01:58,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 168. [2024-11-28 05:01:58,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 149 states have (on average 1.2080536912751678) internal successors, (180), 159 states have internal predecessors, (180), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-28 05:01:58,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 192 transitions. [2024-11-28 05:01:58,945 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 192 transitions. Word has length 49 [2024-11-28 05:01:58,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:01:58,945 INFO L471 AbstractCegarLoop]: Abstraction has 168 states and 192 transitions. [2024-11-28 05:01:58,945 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 2.6) internal successors, (104), 36 states have internal predecessors, (104), 5 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-28 05:01:58,945 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 192 transitions. [2024-11-28 05:01:58,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-28 05:01:58,947 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:01:58,948 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:01:58,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-28 05:01:59,149 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:01:59,149 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-28 05:01:59,149 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:01:59,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1586034993, now seen corresponding path program 2 times [2024-11-28 05:01:59,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:01:59,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145499355] [2024-11-28 05:01:59,150 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:01:59,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:01:59,178 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:01:59,178 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:02:00,109 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:02:00,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:02:00,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145499355] [2024-11-28 05:02:00,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145499355] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:02:00,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686155537] [2024-11-28 05:02:00,109 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:02:00,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:02:00,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:02:00,111 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:02:00,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-28 05:02:00,303 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:02:00,303 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:02:00,305 INFO L256 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 78 conjuncts are in the unsatisfiable core [2024-11-28 05:02:00,308 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:02:00,510 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 11 treesize of output 7 [2024-11-28 05:02:00,516 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 11 treesize of output 7 [2024-11-28 05:02:00,528 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 23 treesize of output 11 [2024-11-28 05:02:00,534 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 23 treesize of output 11 [2024-11-28 05:02:00,582 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-28 05:02:00,582 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 05:02:00,644 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 27 treesize of output 15 [2024-11-28 05:02:00,650 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 23 treesize of output 22 [2024-11-28 05:02:00,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 05:02:00,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 05:02:00,794 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-11-28 05:02:00,794 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 93 treesize of output 66 [2024-11-28 05:02:00,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 05:02:00,801 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 25 [2024-11-28 05:02:01,225 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:02:01,225 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:02:16,962 INFO L349 Elim1Store]: treesize reduction 474, result has 43.8 percent of original size [2024-11-28 05:02:16,963 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 9 new quantified variables, introduced 19 case distinctions, treesize of input 5587 treesize of output 3218 [2024-11-28 05:02:17,900 INFO L349 Elim1Store]: treesize reduction 192, result has 40.9 percent of original size [2024-11-28 05:02:17,901 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 23 case distinctions, treesize of input 2726 treesize of output 2306 [2024-11-28 05:02:18,333 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:02:18,333 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 2102 treesize of output 2168 [2024-11-28 05:02:19,694 INFO L349 Elim1Store]: treesize reduction 738, result has 42.3 percent of original size [2024-11-28 05:02:19,694 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 19 case distinctions, treesize of input 2929 treesize of output 2599 [2024-11-28 05:02:20,717 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:02:20,718 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 2819 treesize of output 2904 [2024-11-28 05:02:23,132 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 6 treesize of output 4 [2024-11-28 05:02:23,779 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 6 treesize of output 4 [2024-11-28 05:02:24,776 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 6 treesize of output 4 [2024-11-28 05:02:24,857 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 6 treesize of output 4 [2024-11-28 05:02:24,969 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 6 treesize of output 4 [2024-11-28 05:02:25,325 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 6 treesize of output 4 [2024-11-28 05:02:25,437 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 6 treesize of output 4 [2024-11-28 05:12:04,398 WARN L249 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) stderr output: (error "out of memory") [2024-11-28 05:12:04,398 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 101 [2024-11-28 05:12:04,400 WARN L320 FreeRefinementEngine]: Global settings require throwing the following exception [2024-11-28 05:12:04,406 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-28 05:12:04,600 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-11-28 05:12:04,601 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseSuccess(Executor.java:277) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.push(Scriptor.java:133) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.push(DiffWrapperScript.java:90) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.push(WrapperScript.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.push(HistoryRecordingScript.java:107) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:48) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.checkRedundancy(SimplifyDDA2.java:275) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convertForPreprocessedInputTerms(SimplifyDDA2.java:499) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convert(SimplifyDDA2.java:484) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convert(SimplifyDDA2.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.simplify(SimplifyDDA2.java:590) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:245) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplifyWithStatistics(SmtUtils.java:318) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify(QuantifierPusher.java:728) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:140) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:100) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.pushMinionEliminatees(QuantifierPushUtilsForSubsetPush.java:255) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:151) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:337) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:189) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:100) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:283) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:51) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:234) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:416) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:360) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:267) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:325) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:181) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:160) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:106) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:317) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:428) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:314) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:275) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:132) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1518) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:701) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:258) ... 69 more [2024-11-28 05:12:04,608 INFO L158 Benchmark]: Toolchain (without parser) took 664339.70ms. Allocated memory was 117.4MB in the beginning and 1.4GB in the end (delta: 1.2GB). Free memory was 90.8MB in the beginning and 628.0MB in the end (delta: -537.2MB). Peak memory consumption was 843.0MB. Max. memory is 16.1GB. [2024-11-28 05:12:04,608 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 117.4MB. Free memory was 74.6MB in the beginning and 74.5MB in the end (delta: 146.9kB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 05:12:04,608 INFO L158 Benchmark]: CACSL2BoogieTranslator took 467.51ms. Allocated memory is still 117.4MB. Free memory was 90.6MB in the beginning and 71.6MB in the end (delta: 19.0MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-28 05:12:04,608 INFO L158 Benchmark]: Boogie Procedure Inliner took 57.59ms. Allocated memory is still 117.4MB. Free memory was 71.6MB in the beginning and 70.1MB in the end (delta: 1.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-28 05:12:04,609 INFO L158 Benchmark]: Boogie Preprocessor took 75.35ms. Allocated memory is still 117.4MB. Free memory was 70.1MB in the beginning and 67.5MB in the end (delta: 2.6MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 05:12:04,609 INFO L158 Benchmark]: RCFGBuilder took 649.55ms. Allocated memory is still 117.4MB. Free memory was 67.5MB in the beginning and 47.7MB in the end (delta: 19.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-28 05:12:04,609 INFO L158 Benchmark]: TraceAbstraction took 663080.35ms. Allocated memory was 117.4MB in the beginning and 1.4GB in the end (delta: 1.2GB). Free memory was 47.1MB in the beginning and 628.0MB in the end (delta: -580.9MB). Peak memory consumption was 801.1MB. Max. memory is 16.1GB. [2024-11-28 05:12:04,610 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 117.4MB. Free memory was 74.6MB in the beginning and 74.5MB in the end (delta: 146.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 467.51ms. Allocated memory is still 117.4MB. Free memory was 90.6MB in the beginning and 71.6MB in the end (delta: 19.0MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 57.59ms. Allocated memory is still 117.4MB. Free memory was 71.6MB in the beginning and 70.1MB in the end (delta: 1.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 75.35ms. Allocated memory is still 117.4MB. Free memory was 70.1MB in the beginning and 67.5MB in the end (delta: 2.6MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 649.55ms. Allocated memory is still 117.4MB. Free memory was 67.5MB in the beginning and 47.7MB in the end (delta: 19.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 663080.35ms. Allocated memory was 117.4MB in the beginning and 1.4GB in the end (delta: 1.2GB). Free memory was 47.1MB in the beginning and 628.0MB in the end (delta: -580.9MB). Peak memory consumption was 801.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/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_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-broom/sll-shared-sll.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/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 64bit --witnessprinter.graph.data.programhash 2fa49e67cf70129223df227686710f59267eaca2c9c0899d0fe3cafabfccfe68 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 05:12:07,284 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 05:12:07,398 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Bitvector.epf [2024-11-28 05:12:07,406 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 05:12:07,409 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 05:12:07,446 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 05:12:07,448 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 05:12:07,449 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 05:12:07,449 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 05:12:07,450 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 05:12:07,451 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 05:12:07,451 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 05:12:07,451 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 05:12:07,451 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 05:12:07,452 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 05:12:07,453 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 05:12:07,453 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 05:12:07,453 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 05:12:07,453 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-28 05:12:07,453 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-28 05:12:07,454 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-28 05:12:07,454 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 05:12:07,454 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-28 05:12:07,454 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-28 05:12:07,454 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-28 05:12:07,454 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-28 05:12:07,454 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 05:12:07,455 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 05:12:07,455 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 05:12:07,455 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 05:12:07,455 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 05:12:07,456 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 05:12:07,456 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 05:12:07,456 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 05:12:07,456 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 05:12:07,456 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 05:12:07,456 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 05:12:07,456 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 05:12:07,457 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 05:12:07,457 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 05:12:07,457 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2024-11-28 05:12:07,457 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-28 05:12:07,457 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 05:12:07,457 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 05:12:07,457 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 05:12:07,457 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 05:12:07,457 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_870a2ffb-a013-4892-8e0a-478dabdcc7b8/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 -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2fa49e67cf70129223df227686710f59267eaca2c9c0899d0fe3cafabfccfe68 [2024-11-28 05:12:07,844 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 05:12:07,858 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 05:12:07,860 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 05:12:07,864 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 05:12:07,866 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 05:12:07,867 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/memsafety-broom/sll-shared-sll.i [2024-11-28 05:12:11,009 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/data/20e76d5b1/021727d64b65498fb8d7a8c0c0005717/FLAG4cc3a85c4 [2024-11-28 05:12:11,385 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 05:12:11,386 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/sv-benchmarks/c/memsafety-broom/sll-shared-sll.i [2024-11-28 05:12:11,420 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/data/20e76d5b1/021727d64b65498fb8d7a8c0c0005717/FLAG4cc3a85c4 [2024-11-28 05:12:11,439 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/data/20e76d5b1/021727d64b65498fb8d7a8c0c0005717 [2024-11-28 05:12:11,442 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 05:12:11,443 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 05:12:11,445 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 05:12:11,445 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 05:12:11,450 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 05:12:11,451 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:12:11" (1/1) ... [2024-11-28 05:12:11,452 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39694092 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:12:11, skipping insertion in model container [2024-11-28 05:12:11,453 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:12:11" (1/1) ... [2024-11-28 05:12:11,503 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 05:12:11,914 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 05:12:11,934 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 05:12:11,984 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 05:12:12,026 INFO L204 MainTranslator]: Completed translation [2024-11-28 05:12:12,026 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:12:12 WrapperNode [2024-11-28 05:12:12,026 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 05:12:12,027 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 05:12:12,028 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 05:12:12,028 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 05:12:12,035 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:12:12" (1/1) ... [2024-11-28 05:12:12,063 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:12:12" (1/1) ... [2024-11-28 05:12:12,109 INFO L138 Inliner]: procedures = 122, calls = 29, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 91 [2024-11-28 05:12:12,109 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 05:12:12,110 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 05:12:12,110 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 05:12:12,110 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 05:12:12,122 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:12:12" (1/1) ... [2024-11-28 05:12:12,123 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:12:12" (1/1) ... [2024-11-28 05:12:12,129 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:12:12" (1/1) ... [2024-11-28 05:12:12,175 INFO L175 MemorySlicer]: Split 14 memory accesses to 1 slices as follows [14]. 100 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0]. The 7 writes are split as follows [7]. [2024-11-28 05:12:12,175 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:12:12" (1/1) ... [2024-11-28 05:12:12,176 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:12:12" (1/1) ... [2024-11-28 05:12:12,192 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:12:12" (1/1) ... [2024-11-28 05:12:12,196 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:12:12" (1/1) ... [2024-11-28 05:12:12,201 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:12:12" (1/1) ... [2024-11-28 05:12:12,204 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:12:12" (1/1) ... [2024-11-28 05:12:12,209 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:12:12" (1/1) ... [2024-11-28 05:12:12,211 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 05:12:12,217 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 05:12:12,217 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 05:12:12,218 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 05:12:12,219 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:12:12" (1/1) ... [2024-11-28 05:12:12,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 05:12:12,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:12:12,263 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 05:12:12,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 05:12:12,302 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_and_zero_internal [2024-11-28 05:12:12,302 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_and_zero_internal [2024-11-28 05:12:12,303 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_and_zero [2024-11-28 05:12:12,303 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_and_zero [2024-11-28 05:12:12,303 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-28 05:12:12,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-28 05:12:12,303 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-28 05:12:12,304 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-28 05:12:12,304 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 05:12:12,304 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 05:12:12,490 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 05:12:12,492 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 05:12:13,081 INFO L? ?]: Removed 94 outVars from TransFormulas that were not future-live. [2024-11-28 05:12:13,081 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 05:12:13,094 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 05:12:13,094 INFO L312 CfgBuilder]: Removed 5 assume(true) statements. [2024-11-28 05:12:13,095 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:12:13 BoogieIcfgContainer [2024-11-28 05:12:13,095 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 05:12:13,098 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 05:12:13,098 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 05:12:13,103 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 05:12:13,104 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 05:12:11" (1/3) ... [2024-11-28 05:12:13,104 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@647e71ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:12:13, skipping insertion in model container [2024-11-28 05:12:13,105 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:12:12" (2/3) ... [2024-11-28 05:12:13,105 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@647e71ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:12:13, skipping insertion in model container [2024-11-28 05:12:13,105 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:12:13" (3/3) ... [2024-11-28 05:12:13,107 INFO L128 eAbstractionObserver]: Analyzing ICFG sll-shared-sll.i [2024-11-28 05:12:13,121 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 05:12:13,123 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG sll-shared-sll.i that has 3 procedures, 98 locations, 1 initial locations, 5 loop locations, and 35 error locations. [2024-11-28 05:12:13,168 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 05:12:13,202 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;@4f7231a1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 05:12:13,202 INFO L334 AbstractCegarLoop]: Starting to check reachability of 35 error locations. [2024-11-28 05:12:13,208 INFO L276 IsEmpty]: Start isEmpty. Operand has 98 states, 56 states have (on average 1.8214285714285714) internal successors, (102), 91 states have internal predecessors, (102), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-28 05:12:13,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-11-28 05:12:13,215 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:12:13,215 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-11-28 05:12:13,216 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-28 05:12:13,221 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:12:13,222 INFO L85 PathProgramCache]: Analyzing trace with hash 37420381, now seen corresponding path program 1 times [2024-11-28 05:12:13,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 05:12:13,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1920305000] [2024-11-28 05:12:13,235 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:12:13,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:12:13,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:12:13,248 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:12:13,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 05:12:13,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:12:13,354 INFO L256 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-28 05:12:13,359 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:12:13,427 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 7 [2024-11-28 05:12:13,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:12:13,455 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 05:12:13,456 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 05:12:13,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920305000] [2024-11-28 05:12:13,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920305000] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:12:13,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:12:13,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 05:12:13,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179914666] [2024-11-28 05:12:13,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:12:13,465 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 05:12:13,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 05:12:13,490 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 05:12:13,491 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 05:12:13,493 INFO L87 Difference]: Start difference. First operand has 98 states, 56 states have (on average 1.8214285714285714) internal successors, (102), 91 states have internal predecessors, (102), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:12:13,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:12:13,738 INFO L93 Difference]: Finished difference Result 96 states and 103 transitions. [2024-11-28 05:12:13,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 05:12:13,741 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2024-11-28 05:12:13,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:12:13,748 INFO L225 Difference]: With dead ends: 96 [2024-11-28 05:12:13,749 INFO L226 Difference]: Without dead ends: 94 [2024-11-28 05:12:13,751 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 05:12:13,754 INFO L435 NwaCegarLoop]: 98 mSDtfsCounter, 2 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 05:12:13,758 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 162 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 05:12:13,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2024-11-28 05:12:13,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2024-11-28 05:12:13,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 55 states have (on average 1.690909090909091) internal successors, (93), 87 states have internal predecessors, (93), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-28 05:12:13,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 101 transitions. [2024-11-28 05:12:13,817 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 101 transitions. Word has length 5 [2024-11-28 05:12:13,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:12:13,817 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 101 transitions. [2024-11-28 05:12:13,817 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:12:13,818 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 101 transitions. [2024-11-28 05:12:13,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-11-28 05:12:13,819 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:12:13,819 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-11-28 05:12:13,832 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-28 05:12:14,020 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:12:14,020 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-28 05:12:14,021 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:12:14,021 INFO L85 PathProgramCache]: Analyzing trace with hash 37420382, now seen corresponding path program 1 times [2024-11-28 05:12:14,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 05:12:14,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1269491623] [2024-11-28 05:12:14,021 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:12:14,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:12:14,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:12:14,024 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:12:14,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 05:12:14,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:12:14,092 INFO L256 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-28 05:12:14,094 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:12:14,106 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 05:12:14,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:12:14,127 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 05:12:14,127 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 05:12:14,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269491623] [2024-11-28 05:12:14,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269491623] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:12:14,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:12:14,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 05:12:14,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315580716] [2024-11-28 05:12:14,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:12:14,129 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 05:12:14,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 05:12:14,130 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 05:12:14,130 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 05:12:14,130 INFO L87 Difference]: Start difference. First operand 94 states and 101 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:12:14,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:12:14,431 INFO L93 Difference]: Finished difference Result 92 states and 99 transitions. [2024-11-28 05:12:14,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 05:12:14,432 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2024-11-28 05:12:14,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:12:14,433 INFO L225 Difference]: With dead ends: 92 [2024-11-28 05:12:14,433 INFO L226 Difference]: Without dead ends: 92 [2024-11-28 05:12:14,433 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 05:12:14,434 INFO L435 NwaCegarLoop]: 96 mSDtfsCounter, 2 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 05:12:14,434 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 166 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 05:12:14,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-11-28 05:12:14,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2024-11-28 05:12:14,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 55 states have (on average 1.6545454545454545) internal successors, (91), 85 states have internal predecessors, (91), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-28 05:12:14,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 99 transitions. [2024-11-28 05:12:14,443 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 99 transitions. Word has length 5 [2024-11-28 05:12:14,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:12:14,443 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 99 transitions. [2024-11-28 05:12:14,443 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:12:14,444 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 99 transitions. [2024-11-28 05:12:14,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-28 05:12:14,444 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:12:14,444 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:12:14,455 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-28 05:12:14,645 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:12:14,645 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting alloc_and_zero_internalErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-28 05:12:14,646 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:12:14,646 INFO L85 PathProgramCache]: Analyzing trace with hash 986048043, now seen corresponding path program 1 times [2024-11-28 05:12:14,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 05:12:14,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [572488213] [2024-11-28 05:12:14,646 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:12:14,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:12:14,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:12:14,650 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:12:14,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 05:12:14,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:12:14,733 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-28 05:12:14,735 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:12:14,744 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 7 [2024-11-28 05:12:14,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:12:14,754 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 05:12:14,754 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 05:12:14,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572488213] [2024-11-28 05:12:14,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572488213] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:12:14,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:12:14,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 05:12:14,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363117826] [2024-11-28 05:12:14,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:12:14,755 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 05:12:14,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 05:12:14,756 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 05:12:14,756 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 05:12:14,756 INFO L87 Difference]: Start difference. First operand 92 states and 99 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-28 05:12:14,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:12:14,968 INFO L93 Difference]: Finished difference Result 91 states and 98 transitions. [2024-11-28 05:12:14,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 05:12:14,969 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2024-11-28 05:12:14,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:12:14,970 INFO L225 Difference]: With dead ends: 91 [2024-11-28 05:12:14,970 INFO L226 Difference]: Without dead ends: 91 [2024-11-28 05:12:14,970 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 05:12:14,971 INFO L435 NwaCegarLoop]: 95 mSDtfsCounter, 1 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 05:12:14,972 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 157 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 05:12:14,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2024-11-28 05:12:14,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2024-11-28 05:12:14,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 55 states have (on average 1.6363636363636365) internal successors, (90), 84 states have internal predecessors, (90), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-28 05:12:14,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 98 transitions. [2024-11-28 05:12:14,984 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 98 transitions. Word has length 13 [2024-11-28 05:12:14,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:12:14,986 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 98 transitions. [2024-11-28 05:12:14,986 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-28 05:12:14,986 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 98 transitions. [2024-11-28 05:12:14,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-28 05:12:14,987 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:12:14,987 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:12:14,997 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-28 05:12:15,187 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:12:15,188 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting alloc_and_zero_internalErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-28 05:12:15,188 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:12:15,188 INFO L85 PathProgramCache]: Analyzing trace with hash 986048044, now seen corresponding path program 1 times [2024-11-28 05:12:15,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 05:12:15,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [42676955] [2024-11-28 05:12:15,189 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:12:15,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:12:15,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:12:15,194 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:12:15,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 05:12:15,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:12:15,301 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-28 05:12:15,302 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:12:15,324 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 05:12:15,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:12:15,342 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 05:12:15,342 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 05:12:15,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42676955] [2024-11-28 05:12:15,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42676955] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:12:15,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:12:15,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 05:12:15,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975722895] [2024-11-28 05:12:15,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:12:15,343 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 05:12:15,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 05:12:15,344 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 05:12:15,344 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 05:12:15,344 INFO L87 Difference]: Start difference. First operand 91 states and 98 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-28 05:12:15,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:12:15,637 INFO L93 Difference]: Finished difference Result 90 states and 97 transitions. [2024-11-28 05:12:15,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 05:12:15,639 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2024-11-28 05:12:15,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:12:15,640 INFO L225 Difference]: With dead ends: 90 [2024-11-28 05:12:15,640 INFO L226 Difference]: Without dead ends: 90 [2024-11-28 05:12:15,640 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 05:12:15,641 INFO L435 NwaCegarLoop]: 95 mSDtfsCounter, 1 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 05:12:15,641 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 164 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 05:12:15,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-11-28 05:12:15,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2024-11-28 05:12:15,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 55 states have (on average 1.6181818181818182) internal successors, (89), 83 states have internal predecessors, (89), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-28 05:12:15,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 97 transitions. [2024-11-28 05:12:15,648 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 97 transitions. Word has length 13 [2024-11-28 05:12:15,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:12:15,648 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 97 transitions. [2024-11-28 05:12:15,648 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-28 05:12:15,648 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 97 transitions. [2024-11-28 05:12:15,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-28 05:12:15,649 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:12:15,649 INFO L218 NwaCegarLoop]: trace histogram [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 05:12:15,660 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-28 05:12:15,850 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:12:15,850 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-28 05:12:15,850 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:12:15,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1865366838, now seen corresponding path program 1 times [2024-11-28 05:12:15,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 05:12:15,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [674078921] [2024-11-28 05:12:15,851 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:12:15,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:12:15,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:12:15,853 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:12:15,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 05:12:15,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:12:15,980 INFO L256 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-28 05:12:15,983 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:12:16,117 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base (_ BitVec 64))) (and (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_internal_~pi~1.base (select |c_#valid| alloc_and_zero_internal_~pi~1.base))) (= (_ bv0 1) (select |c_old(#valid)| alloc_and_zero_internal_~pi~1.base)))) is different from true [2024-11-28 05:12:16,222 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-11-28 05:12:16,222 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2024-11-28 05:12:16,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:12:16,262 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 05:12:16,262 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 05:12:16,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674078921] [2024-11-28 05:12:16,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674078921] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:12:16,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:12:16,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-28 05:12:16,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699747123] [2024-11-28 05:12:16,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:12:16,263 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-28 05:12:16,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 05:12:16,263 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-28 05:12:16,263 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=32, Unknown=1, NotChecked=10, Total=56 [2024-11-28 05:12:16,264 INFO L87 Difference]: Start difference. First operand 90 states and 97 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 05:12:16,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:12:16,848 INFO L93 Difference]: Finished difference Result 99 states and 111 transitions. [2024-11-28 05:12:16,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 05:12:16,849 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2024-11-28 05:12:16,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:12:16,851 INFO L225 Difference]: With dead ends: 99 [2024-11-28 05:12:16,851 INFO L226 Difference]: Without dead ends: 99 [2024-11-28 05:12:16,852 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=32, Unknown=1, NotChecked=10, Total=56 [2024-11-28 05:12:16,853 INFO L435 NwaCegarLoop]: 79 mSDtfsCounter, 12 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 139 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-28 05:12:16,853 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 314 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 209 Invalid, 0 Unknown, 139 Unchecked, 0.6s Time] [2024-11-28 05:12:16,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-11-28 05:12:16,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 93. [2024-11-28 05:12:16,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 60 states have (on average 1.5666666666666667) internal successors, (94), 86 states have internal predecessors, (94), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-28 05:12:16,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 102 transitions. [2024-11-28 05:12:16,861 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 102 transitions. Word has length 22 [2024-11-28 05:12:16,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:12:16,861 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 102 transitions. [2024-11-28 05:12:16,862 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 05:12:16,862 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 102 transitions. [2024-11-28 05:12:16,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-28 05:12:16,862 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:12:16,862 INFO L218 NwaCegarLoop]: trace histogram [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 05:12:16,873 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-28 05:12:17,063 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:12:17,063 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-28 05:12:17,064 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:12:17,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1865366837, now seen corresponding path program 1 times [2024-11-28 05:12:17,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 05:12:17,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1491249428] [2024-11-28 05:12:17,064 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:12:17,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:12:17,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:12:17,066 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:12:17,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 05:12:17,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:12:17,160 INFO L256 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-28 05:12:17,163 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:12:17,172 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 05:12:17,467 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base (_ BitVec 64))) (and (= (store |c_old(#length)| alloc_and_zero_internal_~pi~1.base (select |c_#length| alloc_and_zero_internal_~pi~1.base)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| alloc_and_zero_internal_~pi~1.base)))) is different from true [2024-11-28 05:12:17,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 05:12:17,542 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 14 treesize of output 9 [2024-11-28 05:12:17,560 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 05:12:17,561 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 13 treesize of output 13 [2024-11-28 05:12:17,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:12:17,643 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 05:12:17,643 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 05:12:17,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491249428] [2024-11-28 05:12:17,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491249428] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:12:17,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:12:17,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-28 05:12:17,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895178765] [2024-11-28 05:12:17,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:12:17,644 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 05:12:17,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 05:12:17,645 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 05:12:17,645 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=56, Unknown=1, NotChecked=14, Total=90 [2024-11-28 05:12:17,645 INFO L87 Difference]: Start difference. First operand 93 states and 102 transitions. Second operand has 10 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 05:12:18,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:12:18,468 INFO L93 Difference]: Finished difference Result 99 states and 110 transitions. [2024-11-28 05:12:18,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 05:12:18,470 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2024-11-28 05:12:18,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:12:18,471 INFO L225 Difference]: With dead ends: 99 [2024-11-28 05:12:18,471 INFO L226 Difference]: Without dead ends: 99 [2024-11-28 05:12:18,472 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=56, Unknown=1, NotChecked=14, Total=90 [2024-11-28 05:12:18,473 INFO L435 NwaCegarLoop]: 86 mSDtfsCounter, 5 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 150 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-28 05:12:18,474 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 353 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 267 Invalid, 0 Unknown, 150 Unchecked, 0.8s Time] [2024-11-28 05:12:18,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-11-28 05:12:18,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 93. [2024-11-28 05:12:18,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 60 states have (on average 1.55) internal successors, (93), 86 states have internal predecessors, (93), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-28 05:12:18,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 101 transitions. [2024-11-28 05:12:18,484 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 101 transitions. Word has length 22 [2024-11-28 05:12:18,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:12:18,489 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 101 transitions. [2024-11-28 05:12:18,489 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 05:12:18,489 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 101 transitions. [2024-11-28 05:12:18,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-28 05:12:18,490 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:12:18,490 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:12:18,500 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-28 05:12:18,690 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:12:18,691 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-28 05:12:18,691 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:12:18,691 INFO L85 PathProgramCache]: Analyzing trace with hash -150673119, now seen corresponding path program 1 times [2024-11-28 05:12:18,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 05:12:18,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1182252282] [2024-11-28 05:12:18,691 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:12:18,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:12:18,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:12:18,695 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:12:18,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 05:12:18,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:12:18,793 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-28 05:12:18,796 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:12:18,895 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base (_ BitVec 64))) (and (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_internal_~pi~1.base (select |c_#valid| alloc_and_zero_internal_~pi~1.base))) (= (_ bv0 1) (select |c_old(#valid)| alloc_and_zero_internal_~pi~1.base)))) is different from true [2024-11-28 05:12:18,971 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-11-28 05:12:18,971 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2024-11-28 05:12:18,977 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2024-11-28 05:12:18,977 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:12:19,244 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:12:19,244 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 05:12:19,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182252282] [2024-11-28 05:12:19,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182252282] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:12:19,245 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 05:12:19,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2024-11-28 05:12:19,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068833467] [2024-11-28 05:12:19,245 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 05:12:19,245 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-28 05:12:19,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 05:12:19,246 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-28 05:12:19,246 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=43, Unknown=1, NotChecked=12, Total=72 [2024-11-28 05:12:19,246 INFO L87 Difference]: Start difference. First operand 93 states and 101 transitions. Second operand has 9 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 05:12:19,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:12:19,982 INFO L93 Difference]: Finished difference Result 94 states and 104 transitions. [2024-11-28 05:12:19,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 05:12:19,982 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 26 [2024-11-28 05:12:19,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:12:19,983 INFO L225 Difference]: With dead ends: 94 [2024-11-28 05:12:19,983 INFO L226 Difference]: Without dead ends: 94 [2024-11-28 05:12:19,984 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=69, Unknown=1, NotChecked=16, Total=110 [2024-11-28 05:12:19,984 INFO L435 NwaCegarLoop]: 82 mSDtfsCounter, 8 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-28 05:12:19,985 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 390 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 243 Invalid, 0 Unknown, 99 Unchecked, 0.6s Time] [2024-11-28 05:12:19,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2024-11-28 05:12:19,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2024-11-28 05:12:19,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 61 states have (on average 1.540983606557377) internal successors, (94), 86 states have internal predecessors, (94), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-28 05:12:19,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 104 transitions. [2024-11-28 05:12:19,991 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 104 transitions. Word has length 26 [2024-11-28 05:12:19,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:12:19,992 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 104 transitions. [2024-11-28 05:12:19,992 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 05:12:19,992 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 104 transitions. [2024-11-28 05:12:19,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-28 05:12:19,993 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:12:19,993 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:12:20,005 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-28 05:12:20,193 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:12:20,194 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-28 05:12:20,194 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:12:20,194 INFO L85 PathProgramCache]: Analyzing trace with hash -150673118, now seen corresponding path program 1 times [2024-11-28 05:12:20,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 05:12:20,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [19079908] [2024-11-28 05:12:20,194 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:12:20,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:12:20,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:12:20,199 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:12:20,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 05:12:20,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:12:20,299 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-28 05:12:20,302 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:12:20,317 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 7 [2024-11-28 05:12:20,329 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 05:12:20,580 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base (_ BitVec 64))) (and (= (store |c_old(#length)| alloc_and_zero_internal_~pi~1.base (select |c_#length| alloc_and_zero_internal_~pi~1.base)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| alloc_and_zero_internal_~pi~1.base)))) is different from true [2024-11-28 05:12:20,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 05:12:20,647 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 14 treesize of output 9 [2024-11-28 05:12:20,663 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 05:12:20,663 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 13 treesize of output 13 [2024-11-28 05:12:20,698 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2024-11-28 05:12:20,698 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:12:25,112 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 05:12:25,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19079908] [2024-11-28 05:12:25,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19079908] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:12:25,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [456469650] [2024-11-28 05:12:25,113 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:12:25,113 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-28 05:12:25,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 [2024-11-28 05:12:25,116 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-28 05:12:25,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2024-11-28 05:12:25,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:12:25,387 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-28 05:12:25,389 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:12:25,406 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 7 [2024-11-28 05:12:25,418 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 05:12:25,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 05:12:25,679 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 14 treesize of output 9 [2024-11-28 05:12:25,702 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 05:12:25,703 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 13 treesize of output 13 [2024-11-28 05:12:25,715 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2024-11-28 05:12:25,715 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:12:26,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [456469650] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:12:26,037 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 05:12:26,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2024-11-28 05:12:26,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787831443] [2024-11-28 05:12:26,037 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 05:12:26,037 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-28 05:12:26,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 05:12:26,038 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-28 05:12:26,038 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=69, Unknown=2, NotChecked=16, Total=110 [2024-11-28 05:12:26,038 INFO L87 Difference]: Start difference. First operand 94 states and 104 transitions. Second operand has 9 states, 8 states have (on average 2.5) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 05:12:27,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:12:27,102 INFO L93 Difference]: Finished difference Result 96 states and 105 transitions. [2024-11-28 05:12:27,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 05:12:27,103 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2024-11-28 05:12:27,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:12:27,104 INFO L225 Difference]: With dead ends: 96 [2024-11-28 05:12:27,104 INFO L226 Difference]: Without dead ends: 96 [2024-11-28 05:12:27,104 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=29, Invalid=105, Unknown=2, NotChecked=20, Total=156 [2024-11-28 05:12:27,105 INFO L435 NwaCegarLoop]: 86 mSDtfsCounter, 7 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-28 05:12:27,105 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 326 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 229 Invalid, 0 Unknown, 100 Unchecked, 0.9s Time] [2024-11-28 05:12:27,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-11-28 05:12:27,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2024-11-28 05:12:27,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 63 states have (on average 1.507936507936508) internal successors, (95), 88 states have internal predecessors, (95), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-28 05:12:27,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 105 transitions. [2024-11-28 05:12:27,111 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 105 transitions. Word has length 26 [2024-11-28 05:12:27,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:12:27,112 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 105 transitions. [2024-11-28 05:12:27,112 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 05:12:27,112 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 105 transitions. [2024-11-28 05:12:27,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-28 05:12:27,113 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:12:27,113 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 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 05:12:27,125 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-28 05:12:27,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2024-11-28 05:12:27,517 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt [2024-11-28 05:12:27,517 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-28 05:12:27,518 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:12:27,518 INFO L85 PathProgramCache]: Analyzing trace with hash 162440757, now seen corresponding path program 1 times [2024-11-28 05:12:27,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 05:12:27,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [140275298] [2024-11-28 05:12:27,518 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:12:27,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:12:27,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:12:27,520 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:12:27,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-28 05:12:27,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:12:27,611 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-28 05:12:27,613 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:12:27,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:12:27,727 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 05:12:27,727 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 05:12:27,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140275298] [2024-11-28 05:12:27,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140275298] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:12:27,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:12:27,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 05:12:27,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045481677] [2024-11-28 05:12:27,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:12:27,728 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 05:12:27,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 05:12:27,729 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 05:12:27,729 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-28 05:12:27,729 INFO L87 Difference]: Start difference. First operand 96 states and 105 transitions. Second operand has 6 states, 5 states have (on average 4.8) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 05:12:28,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:12:28,301 INFO L93 Difference]: Finished difference Result 118 states and 135 transitions. [2024-11-28 05:12:28,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 05:12:28,302 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2024-11-28 05:12:28,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:12:28,303 INFO L225 Difference]: With dead ends: 118 [2024-11-28 05:12:28,303 INFO L226 Difference]: Without dead ends: 118 [2024-11-28 05:12:28,304 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 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 05:12:28,304 INFO L435 NwaCegarLoop]: 76 mSDtfsCounter, 31 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-28 05:12:28,305 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 290 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-28 05:12:28,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2024-11-28 05:12:28,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 112. [2024-11-28 05:12:28,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 78 states have (on average 1.5384615384615385) internal successors, (120), 103 states have internal predecessors, (120), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-28 05:12:28,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 132 transitions. [2024-11-28 05:12:28,311 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 132 transitions. Word has length 28 [2024-11-28 05:12:28,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:12:28,311 INFO L471 AbstractCegarLoop]: Abstraction has 112 states and 132 transitions. [2024-11-28 05:12:28,312 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 05:12:28,312 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 132 transitions. [2024-11-28 05:12:28,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-28 05:12:28,312 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:12:28,312 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 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 05:12:28,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-28 05:12:28,513 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:12:28,513 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-28 05:12:28,513 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:12:28,513 INFO L85 PathProgramCache]: Analyzing trace with hash 162440758, now seen corresponding path program 1 times [2024-11-28 05:12:28,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 05:12:28,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1901025374] [2024-11-28 05:12:28,514 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:12:28,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:12:28,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:12:28,515 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:12:28,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-28 05:12:28,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:12:28,625 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-28 05:12:28,630 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:12:29,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:12:29,027 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 05:12:29,027 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 05:12:29,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901025374] [2024-11-28 05:12:29,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901025374] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:12:29,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:12:29,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-28 05:12:29,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944057158] [2024-11-28 05:12:29,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:12:29,028 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-28 05:12:29,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 05:12:29,029 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-28 05:12:29,029 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-28 05:12:29,029 INFO L87 Difference]: Start difference. First operand 112 states and 132 transitions. Second operand has 9 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 05:12:29,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:12:29,801 INFO L93 Difference]: Finished difference Result 118 states and 137 transitions. [2024-11-28 05:12:29,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 05:12:29,802 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2024-11-28 05:12:29,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:12:29,803 INFO L225 Difference]: With dead ends: 118 [2024-11-28 05:12:29,803 INFO L226 Difference]: Without dead ends: 118 [2024-11-28 05:12:29,804 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-11-28 05:12:29,804 INFO L435 NwaCegarLoop]: 75 mSDtfsCounter, 20 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-28 05:12:29,805 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 520 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-28 05:12:29,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2024-11-28 05:12:29,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 116. [2024-11-28 05:12:29,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 82 states have (on average 1.524390243902439) internal successors, (125), 107 states have internal predecessors, (125), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-28 05:12:29,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 137 transitions. [2024-11-28 05:12:29,815 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 137 transitions. Word has length 28 [2024-11-28 05:12:29,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:12:29,819 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 137 transitions. [2024-11-28 05:12:29,819 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 05:12:29,819 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 137 transitions. [2024-11-28 05:12:29,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-28 05:12:29,820 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:12:29,820 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 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 05:12:29,833 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-28 05:12:30,020 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:12:30,020 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-28 05:12:30,021 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:12:30,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1486813211, now seen corresponding path program 1 times [2024-11-28 05:12:30,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 05:12:30,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [97711787] [2024-11-28 05:12:30,021 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:12:30,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:12:30,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:12:30,023 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:12:30,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-28 05:12:30,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:12:30,125 INFO L256 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 05:12:30,128 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:12:30,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:12:30,274 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 05:12:30,274 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 05:12:30,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97711787] [2024-11-28 05:12:30,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97711787] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:12:30,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:12:30,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-28 05:12:30,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034848565] [2024-11-28 05:12:30,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:12:30,276 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-28 05:12:30,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 05:12:30,276 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-28 05:12:30,276 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-28 05:12:30,276 INFO L87 Difference]: Start difference. First operand 116 states and 137 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 05:12:30,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:12:30,502 INFO L93 Difference]: Finished difference Result 118 states and 139 transitions. [2024-11-28 05:12:30,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 05:12:30,503 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2024-11-28 05:12:30,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:12:30,505 INFO L225 Difference]: With dead ends: 118 [2024-11-28 05:12:30,505 INFO L226 Difference]: Without dead ends: 118 [2024-11-28 05:12:30,505 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-28 05:12:30,506 INFO L435 NwaCegarLoop]: 86 mSDtfsCounter, 25 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 05:12:30,506 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 556 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 05:12:30,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2024-11-28 05:12:30,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2024-11-28 05:12:30,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 83 states have (on average 1.4939759036144578) internal successors, (124), 108 states have internal predecessors, (124), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-28 05:12:30,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 136 transitions. [2024-11-28 05:12:30,515 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 136 transitions. Word has length 30 [2024-11-28 05:12:30,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:12:30,516 INFO L471 AbstractCegarLoop]: Abstraction has 117 states and 136 transitions. [2024-11-28 05:12:30,516 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 05:12:30,516 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 136 transitions. [2024-11-28 05:12:30,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-28 05:12:30,519 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:12:30,520 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, 1] [2024-11-28 05:12:30,530 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-28 05:12:30,720 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:12:30,720 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-28 05:12:30,721 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:12:30,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1625384127, now seen corresponding path program 1 times [2024-11-28 05:12:30,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 05:12:30,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1361067760] [2024-11-28 05:12:30,721 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:12:30,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:12:30,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:12:30,725 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:12:30,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-28 05:12:30,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:12:30,834 INFO L256 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-28 05:12:30,836 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:12:30,992 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-11-28 05:12:30,992 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2024-11-28 05:12:30,997 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:12:30,997 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 05:12:30,997 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 05:12:30,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361067760] [2024-11-28 05:12:30,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361067760] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:12:30,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:12:30,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 05:12:30,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518191152] [2024-11-28 05:12:30,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:12:30,998 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 05:12:30,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 05:12:30,999 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 05:12:30,999 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 05:12:30,999 INFO L87 Difference]: Start difference. First operand 117 states and 136 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, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 05:12:31,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:12:31,481 INFO L93 Difference]: Finished difference Result 117 states and 135 transitions. [2024-11-28 05:12:31,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 05:12:31,481 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, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 32 [2024-11-28 05:12:31,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:12:31,482 INFO L225 Difference]: With dead ends: 117 [2024-11-28 05:12:31,482 INFO L226 Difference]: Without dead ends: 117 [2024-11-28 05:12:31,483 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 05:12:31,483 INFO L435 NwaCegarLoop]: 80 mSDtfsCounter, 12 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-28 05:12:31,483 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 228 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 126 Invalid, 1 Unknown, 0 Unchecked, 0.5s Time] [2024-11-28 05:12:31,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2024-11-28 05:12:31,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2024-11-28 05:12:31,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 83 states have (on average 1.4819277108433735) internal successors, (123), 108 states have internal predecessors, (123), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-28 05:12:31,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 135 transitions. [2024-11-28 05:12:31,492 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 135 transitions. Word has length 32 [2024-11-28 05:12:31,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:12:31,492 INFO L471 AbstractCegarLoop]: Abstraction has 117 states and 135 transitions. [2024-11-28 05:12:31,492 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, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 05:12:31,492 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 135 transitions. [2024-11-28 05:12:31,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-28 05:12:31,493 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:12:31,494 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, 1] [2024-11-28 05:12:31,507 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-28 05:12:31,694 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:12:31,694 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-28 05:12:31,695 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:12:31,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1625384128, now seen corresponding path program 1 times [2024-11-28 05:12:31,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 05:12:31,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1636702093] [2024-11-28 05:12:31,695 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:12:31,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:12:31,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:12:31,697 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:12:31,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-28 05:12:31,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:12:31,814 INFO L256 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-28 05:12:31,816 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:12:32,056 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base (_ BitVec 64))) (and (= (store |c_old(#length)| alloc_and_zero_~pi~0.base (select |c_#length| alloc_and_zero_~pi~0.base)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| alloc_and_zero_~pi~0.base)))) is different from true [2024-11-28 05:12:32,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 05:12:32,130 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 14 treesize of output 9 [2024-11-28 05:12:32,148 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 05:12:32,149 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 13 treesize of output 13 [2024-11-28 05:12:32,196 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2024-11-28 05:12:32,196 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:12:36,656 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 05:12:36,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636702093] [2024-11-28 05:12:36,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636702093] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:12:36,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [971522517] [2024-11-28 05:12:36,657 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:12:36,657 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-28 05:12:36,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 [2024-11-28 05:12:36,659 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-28 05:12:36,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2024-11-28 05:12:36,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:12:36,919 INFO L256 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-28 05:12:36,921 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:12:36,942 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 7 [2024-11-28 05:12:36,951 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 05:12:37,412 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base (_ BitVec 64))) (and (= (store |c_old(#length)| alloc_and_zero_internal_~pi~1.base (select |c_#length| alloc_and_zero_internal_~pi~1.base)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| alloc_and_zero_internal_~pi~1.base)))) is different from true [2024-11-28 05:12:37,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 05:12:37,490 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 14 treesize of output 9 [2024-11-28 05:12:37,510 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 05:12:37,510 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 13 treesize of output 13 [2024-11-28 05:12:37,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 05:12:37,790 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 14 treesize of output 9 [2024-11-28 05:12:37,823 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 05:12:37,823 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 13 treesize of output 13 [2024-11-28 05:12:37,836 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2024-11-28 05:12:37,836 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:12:38,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [971522517] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:12:38,120 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 05:12:38,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2024-11-28 05:12:38,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116289740] [2024-11-28 05:12:38,121 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 05:12:38,121 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-28 05:12:38,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 05:12:38,122 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-28 05:12:38,122 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=194, Unknown=3, NotChecked=58, Total=306 [2024-11-28 05:12:38,122 INFO L87 Difference]: Start difference. First operand 117 states and 135 transitions. Second operand has 16 states, 15 states have (on average 3.0) internal successors, (45), 12 states have internal predecessors, (45), 4 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-28 05:12:39,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:12:39,640 INFO L93 Difference]: Finished difference Result 130 states and 150 transitions. [2024-11-28 05:12:39,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 05:12:39,641 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.0) internal successors, (45), 12 states have internal predecessors, (45), 4 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 32 [2024-11-28 05:12:39,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:12:39,642 INFO L225 Difference]: With dead ends: 130 [2024-11-28 05:12:39,642 INFO L226 Difference]: Without dead ends: 130 [2024-11-28 05:12:39,643 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=59, Invalid=252, Unknown=3, NotChecked=66, Total=380 [2024-11-28 05:12:39,643 INFO L435 NwaCegarLoop]: 78 mSDtfsCounter, 26 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 634 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 292 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-28 05:12:39,644 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 634 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 331 Invalid, 0 Unknown, 292 Unchecked, 1.3s Time] [2024-11-28 05:12:39,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2024-11-28 05:12:39,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 126. [2024-11-28 05:12:39,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 91 states have (on average 1.4725274725274726) internal successors, (134), 116 states have internal predecessors, (134), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-28 05:12:39,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 148 transitions. [2024-11-28 05:12:39,649 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 148 transitions. Word has length 32 [2024-11-28 05:12:39,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:12:39,649 INFO L471 AbstractCegarLoop]: Abstraction has 126 states and 148 transitions. [2024-11-28 05:12:39,649 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.0) internal successors, (45), 12 states have internal predecessors, (45), 4 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-28 05:12:39,649 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 148 transitions. [2024-11-28 05:12:39,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-28 05:12:39,650 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:12:39,650 INFO L218 NwaCegarLoop]: trace histogram [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 05:12:39,658 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-28 05:12:39,853 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (16)] Ended with exit code 0 [2024-11-28 05:12:40,050 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt [2024-11-28 05:12:40,051 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-28 05:12:40,051 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:12:40,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1155493431, now seen corresponding path program 1 times [2024-11-28 05:12:40,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 05:12:40,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [854852924] [2024-11-28 05:12:40,051 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:12:40,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:12:40,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:12:40,053 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:12:40,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-28 05:12:40,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:12:40,151 INFO L256 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-28 05:12:40,154 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:12:40,169 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 11 treesize of output 7 [2024-11-28 05:12:40,179 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 11 treesize of output 7 [2024-11-28 05:12:40,227 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 21 treesize of output 20 [2024-11-28 05:12:40,251 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 21 treesize of output 20 [2024-11-28 05:12:40,894 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base (_ BitVec 64))) (and (= (store |c_old(#memory_$Pointer$#0.offset)| alloc_and_zero_internal_~pi~1.base (select |c_#memory_$Pointer$#0.offset| alloc_and_zero_internal_~pi~1.base)) |c_#memory_$Pointer$#0.offset|) (= (_ bv0 1) (select |c_old(#valid)| alloc_and_zero_internal_~pi~1.base)) (= |c_#memory_$Pointer$#0.base| (store |c_old(#memory_$Pointer$#0.base)| alloc_and_zero_internal_~pi~1.base (select |c_#memory_$Pointer$#0.base| alloc_and_zero_internal_~pi~1.base))))) is different from true [2024-11-28 05:12:40,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 05:12:40,970 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 25 treesize of output 18 [2024-11-28 05:12:40,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 05:12:40,995 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 25 treesize of output 18 [2024-11-28 05:12:41,035 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 05:12:41,035 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 13 treesize of output 13 [2024-11-28 05:12:41,415 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:12:41,416 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 14 [2024-11-28 05:12:41,427 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 14 [2024-11-28 05:12:41,822 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:12:41,823 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:12:42,939 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 05:12:42,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854852924] [2024-11-28 05:12:42,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854852924] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:12:42,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [951218884] [2024-11-28 05:12:42,939 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:12:42,940 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-28 05:12:42,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 [2024-11-28 05:12:42,942 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-28 05:12:42,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2024-11-28 05:12:43,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:12:43,167 INFO L256 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-28 05:12:43,170 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:12:43,178 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 7 [2024-11-28 05:12:43,279 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 11 treesize of output 7 [2024-11-28 05:12:43,296 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 11 treesize of output 7 [2024-11-28 05:12:43,417 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 19 treesize of output 18 [2024-11-28 05:12:43,437 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 19 treesize of output 18 [2024-11-28 05:12:44,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 05:12:44,294 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 23 treesize of output 16 [2024-11-28 05:12:44,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 05:12:44,308 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 23 treesize of output 16 [2024-11-28 05:12:44,348 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 05:12:44,349 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 13 treesize of output 13 [2024-11-28 05:12:44,739 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:12:44,739 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 1 case distinctions, treesize of input 30 treesize of output 14 [2024-11-28 05:12:44,754 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 30 treesize of output 14 [2024-11-28 05:12:45,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:12:45,216 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:12:45,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [951218884] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:12:45,843 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 05:12:45,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 26 [2024-11-28 05:12:45,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397120278] [2024-11-28 05:12:45,843 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 05:12:45,843 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-28 05:12:45,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 05:12:45,844 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-28 05:12:45,844 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=620, Unknown=3, NotChecked=50, Total=756 [2024-11-28 05:12:45,845 INFO L87 Difference]: Start difference. First operand 126 states and 148 transitions. Second operand has 26 states, 24 states have (on average 1.875) internal successors, (45), 23 states have internal predecessors, (45), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-28 05:12:48,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:12:48,088 INFO L93 Difference]: Finished difference Result 132 states and 154 transitions. [2024-11-28 05:12:48,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-28 05:12:48,089 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 1.875) internal successors, (45), 23 states have internal predecessors, (45), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 31 [2024-11-28 05:12:48,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:12:48,090 INFO L225 Difference]: With dead ends: 132 [2024-11-28 05:12:48,090 INFO L226 Difference]: Without dead ends: 132 [2024-11-28 05:12:48,091 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=83, Invalid=620, Unknown=3, NotChecked=50, Total=756 [2024-11-28 05:12:48,092 INFO L435 NwaCegarLoop]: 79 mSDtfsCounter, 4 mSDsluCounter, 995 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 1074 SdHoareTripleChecker+Invalid, 845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 218 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-11-28 05:12:48,092 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 1074 Invalid, 845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 622 Invalid, 0 Unknown, 218 Unchecked, 2.2s Time] [2024-11-28 05:12:48,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2024-11-28 05:12:48,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2024-11-28 05:12:48,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 97 states have (on average 1.443298969072165) internal successors, (140), 122 states have internal predecessors, (140), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-28 05:12:48,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 154 transitions. [2024-11-28 05:12:48,097 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 154 transitions. Word has length 31 [2024-11-28 05:12:48,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:12:48,098 INFO L471 AbstractCegarLoop]: Abstraction has 132 states and 154 transitions. [2024-11-28 05:12:48,098 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 1.875) internal successors, (45), 23 states have internal predecessors, (45), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-28 05:12:48,098 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 154 transitions. [2024-11-28 05:12:48,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-28 05:12:48,099 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:12:48,099 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, 1, 1, 1] [2024-11-28 05:12:48,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2024-11-28 05:12:48,306 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-28 05:12:48,500 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:12:48,500 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-28 05:12:48,500 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:12:48,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1408907362, now seen corresponding path program 1 times [2024-11-28 05:12:48,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 05:12:48,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1442345654] [2024-11-28 05:12:48,501 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:12:48,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:12:48,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:12:48,503 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:12:48,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-28 05:12:48,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:12:48,608 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-28 05:12:48,610 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:12:48,850 INFO L349 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2024-11-28 05:12:48,850 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2024-11-28 05:12:49,051 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base (_ BitVec 64))) (and (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_internal_~pi~1.base (select |c_#valid| alloc_and_zero_internal_~pi~1.base))) (= (_ bv0 1) (select |c_old(#valid)| alloc_and_zero_internal_~pi~1.base)))) is different from true [2024-11-28 05:12:49,174 INFO L349 Elim1Store]: treesize reduction 48, result has 32.4 percent of original size [2024-11-28 05:12:49,175 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 36 [2024-11-28 05:12:49,333 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 4 not checked. [2024-11-28 05:12:49,333 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:13:01,841 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 05:13:01,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442345654] [2024-11-28 05:13:01,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442345654] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:13:01,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [13071119] [2024-11-28 05:13:01,841 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:13:01,841 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-28 05:13:01,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 [2024-11-28 05:13:01,843 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-28 05:13:01,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2024-11-28 05:13:02,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:13:02,140 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-28 05:13:02,142 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:13:02,147 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 7 [2024-11-28 05:13:02,319 INFO L349 Elim1Store]: treesize reduction 15, result has 42.3 percent of original size [2024-11-28 05:13:02,319 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 17 [2024-11-28 05:13:10,510 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base (_ BitVec 64))) (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_internal_~pi~1.base (_ bv1 1)))) is different from true [2024-11-28 05:13:10,557 INFO L349 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2024-11-28 05:13:10,557 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 18 treesize of output 28 [2024-11-28 05:13:14,805 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 4 not checked. [2024-11-28 05:13:14,805 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:13:23,922 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:13:23,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [13071119] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:13:23,923 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:13:23,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 12] total 23 [2024-11-28 05:13:23,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593301535] [2024-11-28 05:13:23,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:13:23,924 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-28 05:13:23,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 05:13:23,924 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-28 05:13:23,925 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=410, Unknown=9, NotChecked=86, Total=600 [2024-11-28 05:13:23,925 INFO L87 Difference]: Start difference. First operand 132 states and 154 transitions. Second operand has 24 states, 23 states have (on average 2.608695652173913) internal successors, (60), 18 states have internal predecessors, (60), 4 states have call successors, (6), 3 states have call predecessors, (6), 7 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-28 05:13:26,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:13:26,090 INFO L93 Difference]: Finished difference Result 133 states and 153 transitions. [2024-11-28 05:13:26,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 05:13:26,090 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.608695652173913) internal successors, (60), 18 states have internal predecessors, (60), 4 states have call successors, (6), 3 states have call predecessors, (6), 7 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) Word has length 34 [2024-11-28 05:13:26,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:13:26,091 INFO L225 Difference]: With dead ends: 133 [2024-11-28 05:13:26,091 INFO L226 Difference]: Without dead ends: 133 [2024-11-28 05:13:26,091 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 89 SyntacticMatches, 9 SemanticMatches, 26 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 33.7s TimeCoverageRelationStatistics Valid=119, Invalid=530, Unknown=9, NotChecked=98, Total=756 [2024-11-28 05:13:26,092 INFO L435 NwaCegarLoop]: 67 mSDtfsCounter, 52 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 230 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-11-28 05:13:26,092 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 593 Invalid, 784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 532 Invalid, 0 Unknown, 230 Unchecked, 1.9s Time] [2024-11-28 05:13:26,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2024-11-28 05:13:26,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 131. [2024-11-28 05:13:26,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 97 states have (on average 1.4329896907216495) internal successors, (139), 121 states have internal predecessors, (139), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-28 05:13:26,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 153 transitions. [2024-11-28 05:13:26,102 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 153 transitions. Word has length 34 [2024-11-28 05:13:26,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:13:26,102 INFO L471 AbstractCegarLoop]: Abstraction has 131 states and 153 transitions. [2024-11-28 05:13:26,102 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.608695652173913) internal successors, (60), 18 states have internal predecessors, (60), 4 states have call successors, (6), 3 states have call predecessors, (6), 7 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-28 05:13:26,104 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 153 transitions. [2024-11-28 05:13:26,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-28 05:13:26,104 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:13:26,105 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, 1, 1, 1] [2024-11-28 05:13:26,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-28 05:13:26,308 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (20)] Ended with exit code 0 [2024-11-28 05:13:26,505 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt [2024-11-28 05:13:26,505 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-28 05:13:26,506 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:13:26,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1408907363, now seen corresponding path program 1 times [2024-11-28 05:13:26,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 05:13:26,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [621645130] [2024-11-28 05:13:26,506 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:13:26,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:13:26,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:13:26,508 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:13:26,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-28 05:13:26,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:13:26,618 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-28 05:13:26,620 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:13:26,629 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 05:13:26,924 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base (_ BitVec 64))) (and (= (store |c_old(#length)| alloc_and_zero_internal_~pi~1.base (select |c_#length| alloc_and_zero_internal_~pi~1.base)) |c_#length|) (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_internal_~pi~1.base (select |c_#valid| alloc_and_zero_internal_~pi~1.base))) (= (_ bv0 1) (select |c_old(#valid)| alloc_and_zero_internal_~pi~1.base)))) is different from true [2024-11-28 05:13:27,048 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-11-28 05:13:27,048 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2024-11-28 05:13:27,056 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 14 treesize of output 9 [2024-11-28 05:13:27,148 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base (_ BitVec 64))) (and (= (store |c_old(#length)| alloc_and_zero_internal_~pi~1.base (select |c_#length| alloc_and_zero_internal_~pi~1.base)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| alloc_and_zero_internal_~pi~1.base)))) is different from true [2024-11-28 05:13:27,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 05:13:27,211 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 14 treesize of output 9 [2024-11-28 05:13:27,245 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 05:13:27,245 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 13 treesize of output 13 [2024-11-28 05:13:27,355 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 4 not checked. [2024-11-28 05:13:27,355 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:13:27,926 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 05:13:27,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621645130] [2024-11-28 05:13:27,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621645130] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:13:27,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [732644042] [2024-11-28 05:13:27,926 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:13:27,926 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-28 05:13:27,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 [2024-11-28 05:13:27,929 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-28 05:13:27,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2024-11-28 05:13:28,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:13:28,218 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-28 05:13:28,220 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:13:28,229 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 7 [2024-11-28 05:13:28,242 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 05:13:28,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 05:13:28,472 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 14 treesize of output 9 [2024-11-28 05:13:28,522 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-11-28 05:13:28,522 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2024-11-28 05:13:28,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 05:13:28,648 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 14 treesize of output 9 [2024-11-28 05:13:28,667 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 05:13:28,668 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 13 treesize of output 13 [2024-11-28 05:13:28,755 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 4 not checked. [2024-11-28 05:13:28,755 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:13:29,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [732644042] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:13:29,186 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 05:13:29,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2024-11-28 05:13:29,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228275766] [2024-11-28 05:13:29,186 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 05:13:29,187 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-28 05:13:29,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 05:13:29,187 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-28 05:13:29,187 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=88, Unknown=2, NotChecked=38, Total=156 [2024-11-28 05:13:29,187 INFO L87 Difference]: Start difference. First operand 131 states and 153 transitions. Second operand has 11 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 05:13:29,379 WARN L873 $PredicateComparison]: unable to prove that (and (exists ((alloc_and_zero_internal_~pi~1.base (_ BitVec 64))) (and (= (store |c_old(#length)| alloc_and_zero_internal_~pi~1.base (select |c_#length| alloc_and_zero_internal_~pi~1.base)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| alloc_and_zero_internal_~pi~1.base)))) (exists ((alloc_and_zero_internal_~pi~1.base (_ BitVec 64))) (and (= (store |c_old(#length)| alloc_and_zero_internal_~pi~1.base (select |c_#length| alloc_and_zero_internal_~pi~1.base)) |c_#length|) (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_internal_~pi~1.base (select |c_#valid| alloc_and_zero_internal_~pi~1.base))) (= (_ bv0 1) (select |c_old(#valid)| alloc_and_zero_internal_~pi~1.base))))) is different from true [2024-11-28 05:13:30,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:13:30,173 INFO L93 Difference]: Finished difference Result 143 states and 169 transitions. [2024-11-28 05:13:30,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 05:13:30,174 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 34 [2024-11-28 05:13:30,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:13:30,175 INFO L225 Difference]: With dead ends: 143 [2024-11-28 05:13:30,175 INFO L226 Difference]: Without dead ends: 143 [2024-11-28 05:13:30,175 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=30, Invalid=89, Unknown=3, NotChecked=60, Total=182 [2024-11-28 05:13:30,176 INFO L435 NwaCegarLoop]: 82 mSDtfsCounter, 15 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 283 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-28 05:13:30,176 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 355 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 258 Invalid, 0 Unknown, 283 Unchecked, 1.0s Time] [2024-11-28 05:13:30,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2024-11-28 05:13:30,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 137. [2024-11-28 05:13:30,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 103 states have (on average 1.4174757281553398) internal successors, (146), 127 states have internal predecessors, (146), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-28 05:13:30,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 160 transitions. [2024-11-28 05:13:30,181 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 160 transitions. Word has length 34 [2024-11-28 05:13:30,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:13:30,182 INFO L471 AbstractCegarLoop]: Abstraction has 137 states and 160 transitions. [2024-11-28 05:13:30,185 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 05:13:30,185 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 160 transitions. [2024-11-28 05:13:30,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-28 05:13:30,185 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:13:30,186 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:13:30,193 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-28 05:13:30,389 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (22)] Ended with exit code 0 [2024-11-28 05:13:30,586 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt [2024-11-28 05:13:30,586 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-28 05:13:30,587 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:13:30,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1967410863, now seen corresponding path program 1 times [2024-11-28 05:13:30,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 05:13:30,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [354529422] [2024-11-28 05:13:30,587 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:13:30,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:13:30,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:13:30,589 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:13:30,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-28 05:13:30,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:13:30,708 INFO L256 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-28 05:13:30,710 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:13:30,934 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:13:30,934 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 05:13:30,934 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 05:13:30,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354529422] [2024-11-28 05:13:30,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354529422] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:13:30,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:13:30,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 05:13:30,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945236598] [2024-11-28 05:13:30,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:13:30,935 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 05:13:30,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 05:13:30,936 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 05:13:30,936 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-28 05:13:30,936 INFO L87 Difference]: Start difference. First operand 137 states and 160 transitions. Second operand has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 05:13:31,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:13:31,790 INFO L93 Difference]: Finished difference Result 163 states and 189 transitions. [2024-11-28 05:13:31,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 05:13:31,791 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2024-11-28 05:13:31,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:13:31,792 INFO L225 Difference]: With dead ends: 163 [2024-11-28 05:13:31,792 INFO L226 Difference]: Without dead ends: 163 [2024-11-28 05:13:31,792 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-28 05:13:31,793 INFO L435 NwaCegarLoop]: 62 mSDtfsCounter, 54 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-28 05:13:31,793 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 287 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-28 05:13:31,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2024-11-28 05:13:31,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 146. [2024-11-28 05:13:31,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 113 states have (on average 1.4424778761061947) internal successors, (163), 136 states have internal predecessors, (163), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-28 05:13:31,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 177 transitions. [2024-11-28 05:13:31,803 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 177 transitions. Word has length 33 [2024-11-28 05:13:31,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:13:31,803 INFO L471 AbstractCegarLoop]: Abstraction has 146 states and 177 transitions. [2024-11-28 05:13:31,803 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 05:13:31,804 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 177 transitions. [2024-11-28 05:13:31,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-28 05:13:31,804 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:13:31,804 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:13:31,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-11-28 05:13:32,005 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:13:32,005 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-28 05:13:32,005 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:13:32,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1967410864, now seen corresponding path program 1 times [2024-11-28 05:13:32,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 05:13:32,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1433453983] [2024-11-28 05:13:32,006 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:13:32,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:13:32,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:13:32,008 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:13:32,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-28 05:13:32,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:13:32,127 INFO L256 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-28 05:13:32,128 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:13:32,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:13:32,610 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 05:13:32,610 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 05:13:32,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433453983] [2024-11-28 05:13:32,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433453983] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:13:32,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:13:32,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-28 05:13:32,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983483190] [2024-11-28 05:13:32,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:13:32,611 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 05:13:32,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 05:13:32,611 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 05:13:32,611 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-11-28 05:13:32,611 INFO L87 Difference]: Start difference. First operand 146 states and 177 transitions. Second operand has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 05:13:33,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:13:33,683 INFO L93 Difference]: Finished difference Result 177 states and 213 transitions. [2024-11-28 05:13:33,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 05:13:33,684 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2024-11-28 05:13:33,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:13:33,685 INFO L225 Difference]: With dead ends: 177 [2024-11-28 05:13:33,685 INFO L226 Difference]: Without dead ends: 177 [2024-11-28 05:13:33,685 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-11-28 05:13:33,686 INFO L435 NwaCegarLoop]: 66 mSDtfsCounter, 41 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-28 05:13:33,686 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 511 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-28 05:13:33,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2024-11-28 05:13:33,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 168. [2024-11-28 05:13:33,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 135 states have (on average 1.474074074074074) internal successors, (199), 158 states have internal predecessors, (199), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-28 05:13:33,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 213 transitions. [2024-11-28 05:13:33,692 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 213 transitions. Word has length 33 [2024-11-28 05:13:33,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:13:33,693 INFO L471 AbstractCegarLoop]: Abstraction has 168 states and 213 transitions. [2024-11-28 05:13:33,693 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 05:13:33,693 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 213 transitions. [2024-11-28 05:13:33,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-28 05:13:33,693 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:13:33,694 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, 1, 1, 1, 1] [2024-11-28 05:13:33,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-11-28 05:13:33,898 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:13:33,898 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-28 05:13:33,898 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:13:33,898 INFO L85 PathProgramCache]: Analyzing trace with hash 357260193, now seen corresponding path program 1 times [2024-11-28 05:13:33,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 05:13:33,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1899513632] [2024-11-28 05:13:33,899 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:13:33,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:13:33,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:13:33,900 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:13:33,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-28 05:13:34,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:13:34,016 INFO L256 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-28 05:13:34,017 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:13:34,023 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 05:13:34,149 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 15 treesize of output 1 [2024-11-28 05:13:34,157 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 11 treesize of output 7 [2024-11-28 05:13:34,218 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 17 treesize of output 9 [2024-11-28 05:13:34,264 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:13:34,264 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 05:13:34,264 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 05:13:34,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899513632] [2024-11-28 05:13:34,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899513632] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:13:34,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:13:34,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 05:13:34,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433944565] [2024-11-28 05:13:34,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:13:34,265 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 05:13:34,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 05:13:34,266 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 05:13:34,266 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-28 05:13:34,266 INFO L87 Difference]: Start difference. First operand 168 states and 213 transitions. Second operand has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 05:13:34,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:13:34,999 INFO L93 Difference]: Finished difference Result 167 states and 210 transitions. [2024-11-28 05:13:35,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 05:13:35,000 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 35 [2024-11-28 05:13:35,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:13:35,001 INFO L225 Difference]: With dead ends: 167 [2024-11-28 05:13:35,001 INFO L226 Difference]: Without dead ends: 167 [2024-11-28 05:13:35,001 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-28 05:13:35,001 INFO L435 NwaCegarLoop]: 82 mSDtfsCounter, 4 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-28 05:13:35,002 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 373 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-28 05:13:35,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2024-11-28 05:13:35,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2024-11-28 05:13:35,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 135 states have (on average 1.451851851851852) internal successors, (196), 157 states have internal predecessors, (196), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-28 05:13:35,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 210 transitions. [2024-11-28 05:13:35,010 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 210 transitions. Word has length 35 [2024-11-28 05:13:35,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:13:35,010 INFO L471 AbstractCegarLoop]: Abstraction has 167 states and 210 transitions. [2024-11-28 05:13:35,011 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 05:13:35,011 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 210 transitions. [2024-11-28 05:13:35,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-28 05:13:35,011 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:13:35,011 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, 1, 1, 1, 1] [2024-11-28 05:13:35,020 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-28 05:13:35,211 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:13:35,212 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-28 05:13:35,212 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:13:35,212 INFO L85 PathProgramCache]: Analyzing trace with hash 357260192, now seen corresponding path program 1 times [2024-11-28 05:13:35,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 05:13:35,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1455475999] [2024-11-28 05:13:35,212 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:13:35,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:13:35,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:13:35,214 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:13:35,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-28 05:13:35,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:13:35,328 INFO L256 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 05:13:35,330 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:13:35,396 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 15 treesize of output 1 [2024-11-28 05:13:35,434 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 19 treesize of output 11 [2024-11-28 05:13:35,463 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 05:13:35,463 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 05:13:35,463 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 05:13:35,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455475999] [2024-11-28 05:13:35,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455475999] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:13:35,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:13:35,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 05:13:35,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109679661] [2024-11-28 05:13:35,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:13:35,464 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 05:13:35,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 05:13:35,465 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 05:13:35,465 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-28 05:13:35,465 INFO L87 Difference]: Start difference. First operand 167 states and 210 transitions. Second operand has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 05:13:36,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:13:36,106 INFO L93 Difference]: Finished difference Result 166 states and 207 transitions. [2024-11-28 05:13:36,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 05:13:36,107 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 35 [2024-11-28 05:13:36,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:13:36,108 INFO L225 Difference]: With dead ends: 166 [2024-11-28 05:13:36,108 INFO L226 Difference]: Without dead ends: 166 [2024-11-28 05:13:36,108 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-28 05:13:36,108 INFO L435 NwaCegarLoop]: 82 mSDtfsCounter, 3 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-28 05:13:36,109 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 359 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-28 05:13:36,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2024-11-28 05:13:36,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2024-11-28 05:13:36,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 135 states have (on average 1.4296296296296296) internal successors, (193), 156 states have internal predecessors, (193), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-28 05:13:36,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 207 transitions. [2024-11-28 05:13:36,122 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 207 transitions. Word has length 35 [2024-11-28 05:13:36,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:13:36,122 INFO L471 AbstractCegarLoop]: Abstraction has 166 states and 207 transitions. [2024-11-28 05:13:36,123 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 05:13:36,123 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 207 transitions. [2024-11-28 05:13:36,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-28 05:13:36,123 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:13:36,123 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:13:36,131 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-28 05:13:36,324 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:13:36,324 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-28 05:13:36,324 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:13:36,324 INFO L85 PathProgramCache]: Analyzing trace with hash 897131383, now seen corresponding path program 1 times [2024-11-28 05:13:36,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 05:13:36,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [918640919] [2024-11-28 05:13:36,324 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:13:36,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:13:36,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:13:36,326 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:13:36,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-28 05:13:36,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:13:36,437 INFO L256 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 05:13:36,438 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:13:36,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:13:36,640 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 05:13:36,640 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 05:13:36,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918640919] [2024-11-28 05:13:36,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918640919] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:13:36,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:13:36,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-28 05:13:36,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069225373] [2024-11-28 05:13:36,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:13:36,641 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-28 05:13:36,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 05:13:36,641 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-28 05:13:36,641 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-28 05:13:36,641 INFO L87 Difference]: Start difference. First operand 166 states and 207 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 05:13:37,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:13:37,056 INFO L93 Difference]: Finished difference Result 173 states and 211 transitions. [2024-11-28 05:13:37,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 05:13:37,056 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 35 [2024-11-28 05:13:37,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:13:37,057 INFO L225 Difference]: With dead ends: 173 [2024-11-28 05:13:37,057 INFO L226 Difference]: Without dead ends: 173 [2024-11-28 05:13:37,057 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-28 05:13:37,058 INFO L435 NwaCegarLoop]: 73 mSDtfsCounter, 45 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 05:13:37,058 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 521 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 05:13:37,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2024-11-28 05:13:37,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 167. [2024-11-28 05:13:37,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 136 states have (on average 1.3823529411764706) internal successors, (188), 157 states have internal predecessors, (188), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-28 05:13:37,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 202 transitions. [2024-11-28 05:13:37,066 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 202 transitions. Word has length 35 [2024-11-28 05:13:37,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:13:37,066 INFO L471 AbstractCegarLoop]: Abstraction has 167 states and 202 transitions. [2024-11-28 05:13:37,066 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 05:13:37,067 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 202 transitions. [2024-11-28 05:13:37,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-28 05:13:37,067 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:13:37,067 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:13:37,078 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-28 05:13:37,268 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:13:37,268 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-28 05:13:37,268 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:13:37,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1992938169, now seen corresponding path program 1 times [2024-11-28 05:13:37,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 05:13:37,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1720981113] [2024-11-28 05:13:37,268 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:13:37,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:13:37,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:13:37,270 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:13:37,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-28 05:13:37,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:13:37,390 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-28 05:13:37,392 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:13:37,396 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 7 [2024-11-28 05:13:37,455 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 15 treesize of output 1 [2024-11-28 05:13:37,496 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 19 treesize of output 11 [2024-11-28 05:13:37,608 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base (_ BitVec 64))) (and (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_internal_~pi~1.base (select |c_#valid| alloc_and_zero_internal_~pi~1.base))) (= (_ bv0 1) (select |c_old(#valid)| alloc_and_zero_internal_~pi~1.base)))) is different from true [2024-11-28 05:13:37,682 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-11-28 05:13:37,682 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2024-11-28 05:13:37,686 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 4 not checked. [2024-11-28 05:13:37,686 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:13:38,015 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:13:38,015 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 05:13:38,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720981113] [2024-11-28 05:13:38,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720981113] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:13:38,016 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 05:13:38,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2024-11-28 05:13:38,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513217819] [2024-11-28 05:13:38,016 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 05:13:38,016 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-28 05:13:38,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 05:13:38,017 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-28 05:13:38,017 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=73, Unknown=1, NotChecked=16, Total=110 [2024-11-28 05:13:38,017 INFO L87 Difference]: Start difference. First operand 167 states and 202 transitions. Second operand has 11 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-28 05:13:39,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:13:39,111 INFO L93 Difference]: Finished difference Result 166 states and 201 transitions. [2024-11-28 05:13:39,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 05:13:39,112 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 38 [2024-11-28 05:13:39,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:13:39,113 INFO L225 Difference]: With dead ends: 166 [2024-11-28 05:13:39,113 INFO L226 Difference]: Without dead ends: 166 [2024-11-28 05:13:39,113 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=149, Unknown=1, NotChecked=24, Total=210 [2024-11-28 05:13:39,115 INFO L435 NwaCegarLoop]: 83 mSDtfsCounter, 8 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-28 05:13:39,115 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 463 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 280 Invalid, 0 Unknown, 92 Unchecked, 0.9s Time] [2024-11-28 05:13:39,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2024-11-28 05:13:39,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2024-11-28 05:13:39,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 136 states have (on average 1.375) internal successors, (187), 156 states have internal predecessors, (187), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-28 05:13:39,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 201 transitions. [2024-11-28 05:13:39,123 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 201 transitions. Word has length 38 [2024-11-28 05:13:39,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:13:39,123 INFO L471 AbstractCegarLoop]: Abstraction has 166 states and 201 transitions. [2024-11-28 05:13:39,123 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-28 05:13:39,124 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 201 transitions. [2024-11-28 05:13:39,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-28 05:13:39,124 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:13:39,124 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:13:39,136 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-28 05:13:39,325 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:13:39,325 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-28 05:13:39,325 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:13:39,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1992938170, now seen corresponding path program 1 times [2024-11-28 05:13:39,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 05:13:39,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2084425781] [2024-11-28 05:13:39,325 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:13:39,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:13:39,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:13:39,327 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:13:39,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-28 05:13:39,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:13:39,452 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-28 05:13:39,454 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:13:39,463 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 7 [2024-11-28 05:13:39,471 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 05:13:39,615 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 15 treesize of output 1 [2024-11-28 05:13:39,633 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 11 treesize of output 7 [2024-11-28 05:13:39,708 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 28 treesize of output 16 [2024-11-28 05:13:39,926 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base (_ BitVec 64))) (and (= (store |c_old(#length)| alloc_and_zero_internal_~pi~1.base (select |c_#length| alloc_and_zero_internal_~pi~1.base)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| alloc_and_zero_internal_~pi~1.base)))) is different from true [2024-11-28 05:13:39,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 05:13:39,975 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 14 treesize of output 9 [2024-11-28 05:13:39,998 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 05:13:39,998 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 13 treesize of output 13 [2024-11-28 05:13:40,051 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 4 not checked. [2024-11-28 05:13:40,051 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:13:44,563 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 05:13:44,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084425781] [2024-11-28 05:13:44,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084425781] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:13:44,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [808202400] [2024-11-28 05:13:44,564 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:13:44,564 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-28 05:13:44,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 [2024-11-28 05:13:44,566 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-28 05:13:44,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2024-11-28 05:13:44,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:13:44,875 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-28 05:13:44,877 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:13:44,885 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 6 treesize of output 7 [2024-11-28 05:13:44,898 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 05:13:44,988 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 15 treesize of output 1 [2024-11-28 05:13:44,996 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 11 treesize of output 7 [2024-11-28 05:13:45,028 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 28 treesize of output 16 [2024-11-28 05:13:45,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 05:13:45,179 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 14 treesize of output 9 [2024-11-28 05:13:45,212 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 05:13:45,213 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 13 treesize of output 13 [2024-11-28 05:13:45,214 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 4 not checked. [2024-11-28 05:13:45,214 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:13:45,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [808202400] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:13:45,576 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 05:13:45,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2024-11-28 05:13:45,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499676924] [2024-11-28 05:13:45,577 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 05:13:45,577 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-28 05:13:45,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 05:13:45,577 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-28 05:13:45,578 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=107, Unknown=2, NotChecked=20, Total=156 [2024-11-28 05:13:45,578 INFO L87 Difference]: Start difference. First operand 166 states and 201 transitions. Second operand has 11 states, 10 states have (on average 3.0) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 05:13:47,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:13:47,088 INFO L93 Difference]: Finished difference Result 164 states and 199 transitions. [2024-11-28 05:13:47,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 05:13:47,089 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 38 [2024-11-28 05:13:47,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:13:47,090 INFO L225 Difference]: With dead ends: 164 [2024-11-28 05:13:47,090 INFO L226 Difference]: Without dead ends: 164 [2024-11-28 05:13:47,091 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=45, Invalid=197, Unknown=2, NotChecked=28, Total=272 [2024-11-28 05:13:47,091 INFO L435 NwaCegarLoop]: 86 mSDtfsCounter, 7 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-28 05:13:47,092 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 440 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 304 Invalid, 0 Unknown, 92 Unchecked, 1.2s Time] [2024-11-28 05:13:47,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2024-11-28 05:13:47,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2024-11-28 05:13:47,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 136 states have (on average 1.3602941176470589) internal successors, (185), 154 states have internal predecessors, (185), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-28 05:13:47,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 199 transitions. [2024-11-28 05:13:47,098 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 199 transitions. Word has length 38 [2024-11-28 05:13:47,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:13:47,098 INFO L471 AbstractCegarLoop]: Abstraction has 164 states and 199 transitions. [2024-11-28 05:13:47,098 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 05:13:47,098 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 199 transitions. [2024-11-28 05:13:47,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-28 05:13:47,099 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:13:47,099 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:13:47,104 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2024-11-28 05:13:47,306 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-11-28 05:13:47,500 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:13:47,500 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-28 05:13:47,500 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:13:47,500 INFO L85 PathProgramCache]: Analyzing trace with hash 2013367130, now seen corresponding path program 1 times [2024-11-28 05:13:47,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 05:13:47,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [378600736] [2024-11-28 05:13:47,501 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:13:47,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:13:47,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:13:47,503 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:13:47,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-28 05:13:47,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:13:47,630 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-28 05:13:47,632 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:13:47,736 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 7 [2024-11-28 05:13:48,202 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 15 treesize of output 1 [2024-11-28 05:13:48,546 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 19 treesize of output 11 [2024-11-28 05:13:48,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:13:48,673 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 05:13:48,673 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 05:13:48,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378600736] [2024-11-28 05:13:48,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378600736] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:13:48,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:13:48,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2024-11-28 05:13:48,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085703869] [2024-11-28 05:13:48,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:13:48,674 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-28 05:13:48,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 05:13:48,675 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-28 05:13:48,675 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2024-11-28 05:13:48,675 INFO L87 Difference]: Start difference. First operand 164 states and 199 transitions. Second operand has 18 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 05:13:51,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:13:51,397 INFO L93 Difference]: Finished difference Result 181 states and 216 transitions. [2024-11-28 05:13:51,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-28 05:13:51,398 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 36 [2024-11-28 05:13:51,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:13:51,399 INFO L225 Difference]: With dead ends: 181 [2024-11-28 05:13:51,399 INFO L226 Difference]: Without dead ends: 181 [2024-11-28 05:13:51,400 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2024-11-28 05:13:51,400 INFO L435 NwaCegarLoop]: 51 mSDtfsCounter, 48 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 797 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2024-11-28 05:13:51,400 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 617 Invalid, 802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 797 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2024-11-28 05:13:51,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2024-11-28 05:13:51,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 169. [2024-11-28 05:13:51,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 142 states have (on average 1.3450704225352113) internal successors, (191), 159 states have internal predecessors, (191), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-28 05:13:51,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 205 transitions. [2024-11-28 05:13:51,411 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 205 transitions. Word has length 36 [2024-11-28 05:13:51,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:13:51,411 INFO L471 AbstractCegarLoop]: Abstraction has 169 states and 205 transitions. [2024-11-28 05:13:51,412 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 05:13:51,412 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 205 transitions. [2024-11-28 05:13:51,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-28 05:13:51,412 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:13:51,412 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:13:51,424 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-11-28 05:13:51,613 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:13:51,613 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-28 05:13:51,613 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:13:51,613 INFO L85 PathProgramCache]: Analyzing trace with hash 2013367131, now seen corresponding path program 1 times [2024-11-28 05:13:51,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 05:13:51,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1105920748] [2024-11-28 05:13:51,614 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:13:51,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:13:51,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:13:51,616 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:13:51,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-28 05:13:51,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:13:51,748 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-28 05:13:51,751 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:13:51,854 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 05:13:52,423 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 15 treesize of output 1 [2024-11-28 05:13:52,438 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 11 treesize of output 7 [2024-11-28 05:13:52,932 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 17 treesize of output 9 [2024-11-28 05:13:53,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:13:53,184 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 05:13:53,184 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 05:13:53,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105920748] [2024-11-28 05:13:53,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105920748] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:13:53,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:13:53,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2024-11-28 05:13:53,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55300744] [2024-11-28 05:13:53,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:13:53,185 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-28 05:13:53,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 05:13:53,186 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-28 05:13:53,186 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2024-11-28 05:13:53,186 INFO L87 Difference]: Start difference. First operand 169 states and 205 transitions. Second operand has 18 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 05:13:55,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:13:55,422 INFO L93 Difference]: Finished difference Result 189 states and 226 transitions. [2024-11-28 05:13:55,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-28 05:13:55,423 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 36 [2024-11-28 05:13:55,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:13:55,424 INFO L225 Difference]: With dead ends: 189 [2024-11-28 05:13:55,424 INFO L226 Difference]: Without dead ends: 189 [2024-11-28 05:13:55,425 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2024-11-28 05:13:55,425 INFO L435 NwaCegarLoop]: 52 mSDtfsCounter, 53 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-11-28 05:13:55,428 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 589 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-11-28 05:13:55,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2024-11-28 05:13:55,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 171. [2024-11-28 05:13:55,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 144 states have (on average 1.3333333333333333) internal successors, (192), 161 states have internal predecessors, (192), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-28 05:13:55,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 206 transitions. [2024-11-28 05:13:55,439 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 206 transitions. Word has length 36 [2024-11-28 05:13:55,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:13:55,439 INFO L471 AbstractCegarLoop]: Abstraction has 171 states and 206 transitions. [2024-11-28 05:13:55,439 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 05:13:55,439 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 206 transitions. [2024-11-28 05:13:55,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-28 05:13:55,440 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:13:55,440 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:13:55,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2024-11-28 05:13:55,640 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:13:55,641 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-28 05:13:55,641 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:13:55,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1001962680, now seen corresponding path program 1 times [2024-11-28 05:13:55,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 05:13:55,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1272811072] [2024-11-28 05:13:55,641 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:13:55,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:13:55,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:13:55,643 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:13:55,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-28 05:13:55,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:13:55,804 INFO L256 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-28 05:13:55,805 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:13:56,486 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 15 treesize of output 1 [2024-11-28 05:13:56,934 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 15 treesize of output 7 [2024-11-28 05:13:57,143 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:13:57,143 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 05:13:57,143 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 05:13:57,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272811072] [2024-11-28 05:13:57,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272811072] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:13:57,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:13:57,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2024-11-28 05:13:57,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217694665] [2024-11-28 05:13:57,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:13:57,144 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-28 05:13:57,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 05:13:57,144 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-28 05:13:57,144 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2024-11-28 05:13:57,146 INFO L87 Difference]: Start difference. First operand 171 states and 206 transitions. Second operand has 18 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 05:14:00,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:14:00,191 INFO L93 Difference]: Finished difference Result 182 states and 213 transitions. [2024-11-28 05:14:00,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-28 05:14:00,192 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 39 [2024-11-28 05:14:00,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:14:00,193 INFO L225 Difference]: With dead ends: 182 [2024-11-28 05:14:00,193 INFO L226 Difference]: Without dead ends: 182 [2024-11-28 05:14:00,194 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2024-11-28 05:14:00,194 INFO L435 NwaCegarLoop]: 50 mSDtfsCounter, 51 mSDsluCounter, 606 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 656 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2024-11-28 05:14:00,194 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 656 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 723 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2024-11-28 05:14:00,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2024-11-28 05:14:00,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 175. [2024-11-28 05:14:00,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 148 states have (on average 1.3445945945945945) internal successors, (199), 165 states have internal predecessors, (199), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-28 05:14:00,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 213 transitions. [2024-11-28 05:14:00,200 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 213 transitions. Word has length 39 [2024-11-28 05:14:00,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:14:00,201 INFO L471 AbstractCegarLoop]: Abstraction has 175 states and 213 transitions. [2024-11-28 05:14:00,201 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 05:14:00,201 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 213 transitions. [2024-11-28 05:14:00,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-28 05:14:00,202 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:14:00,202 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:14:00,215 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-11-28 05:14:00,402 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:14:00,402 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-28 05:14:00,403 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:14:00,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1317075006, now seen corresponding path program 1 times [2024-11-28 05:14:00,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 05:14:00,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [990668443] [2024-11-28 05:14:00,403 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:14:00,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:14:00,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:14:00,405 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:14:00,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-11-28 05:14:00,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:14:00,557 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-28 05:14:00,560 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:14:01,202 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-28 05:14:01,592 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 16 treesize of output 8 [2024-11-28 05:14:01,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:14:01,724 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 05:14:01,724 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 05:14:01,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990668443] [2024-11-28 05:14:01,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990668443] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:14:01,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:14:01,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2024-11-28 05:14:01,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502712973] [2024-11-28 05:14:01,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:14:01,725 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-28 05:14:01,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 05:14:01,725 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-28 05:14:01,725 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2024-11-28 05:14:01,726 INFO L87 Difference]: Start difference. First operand 175 states and 213 transitions. Second operand has 18 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 05:14:03,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:14:03,996 INFO L93 Difference]: Finished difference Result 180 states and 209 transitions. [2024-11-28 05:14:03,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-28 05:14:03,997 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 41 [2024-11-28 05:14:03,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:14:03,998 INFO L225 Difference]: With dead ends: 180 [2024-11-28 05:14:03,998 INFO L226 Difference]: Without dead ends: 180 [2024-11-28 05:14:03,998 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2024-11-28 05:14:03,998 INFO L435 NwaCegarLoop]: 53 mSDtfsCounter, 46 mSDsluCounter, 770 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 823 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-11-28 05:14:03,999 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 823 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-11-28 05:14:03,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2024-11-28 05:14:04,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 172. [2024-11-28 05:14:04,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 145 states have (on average 1.3379310344827586) internal successors, (194), 162 states have internal predecessors, (194), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-28 05:14:04,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 208 transitions. [2024-11-28 05:14:04,004 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 208 transitions. Word has length 41 [2024-11-28 05:14:04,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:14:04,004 INFO L471 AbstractCegarLoop]: Abstraction has 172 states and 208 transitions. [2024-11-28 05:14:04,004 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 05:14:04,004 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 208 transitions. [2024-11-28 05:14:04,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-28 05:14:04,005 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:14:04,005 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] [2024-11-28 05:14:04,014 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-11-28 05:14:04,206 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:14:04,206 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-28 05:14:04,206 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:14:04,206 INFO L85 PathProgramCache]: Analyzing trace with hash -230245288, now seen corresponding path program 1 times [2024-11-28 05:14:04,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 05:14:04,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [999342038] [2024-11-28 05:14:04,207 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:14:04,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:14:04,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:14:04,208 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:14:04,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-11-28 05:14:04,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:14:04,359 INFO L256 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-28 05:14:04,361 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:14:04,650 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base (_ BitVec 64))) (and (= (store |c_old(#length)| alloc_and_zero_~pi~0.base (select |c_#length| alloc_and_zero_~pi~0.base)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| alloc_and_zero_~pi~0.base)))) is different from true [2024-11-28 05:14:04,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 05:14:04,722 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 14 treesize of output 9 [2024-11-28 05:14:04,751 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 05:14:04,751 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 13 treesize of output 13 [2024-11-28 05:14:04,797 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 5 not checked. [2024-11-28 05:14:04,797 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:14:05,172 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 05:14:05,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999342038] [2024-11-28 05:14:05,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999342038] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:14:05,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [292848795] [2024-11-28 05:14:05,172 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:14:05,172 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-28 05:14:05,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 [2024-11-28 05:14:05,174 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-28 05:14:05,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2024-11-28 05:14:05,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:14:05,583 INFO L256 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-28 05:14:05,586 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:14:05,593 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 7 [2024-11-28 05:14:05,603 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 05:14:06,268 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 05:14:06,268 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 13 treesize of output 13 [2024-11-28 05:14:06,285 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 14 treesize of output 9 [2024-11-28 05:14:06,598 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base (_ BitVec 64))) (= (store |c_old(#length)| alloc_and_zero_internal_~pi~1.base (_ bv8 64)) |c_#length|)) is different from true [2024-11-28 05:14:06,663 INFO L349 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2024-11-28 05:14:06,663 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 1 case distinctions, treesize of input 12 treesize of output 18 [2024-11-28 05:14:07,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 05:14:07,342 INFO L349 Elim1Store]: treesize reduction 21, result has 30.0 percent of original size [2024-11-28 05:14:07,342 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 19 treesize of output 21 [2024-11-28 05:14:07,374 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 05:14:07,374 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 13 treesize of output 13 [2024-11-28 05:14:07,383 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 9 not checked. [2024-11-28 05:14:07,383 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:14:07,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [292848795] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:14:07,672 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 05:14:07,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 15] total 21 [2024-11-28 05:14:07,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219151280] [2024-11-28 05:14:07,673 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 05:14:07,673 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-28 05:14:07,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 05:14:07,673 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-28 05:14:07,674 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=390, Unknown=2, NotChecked=82, Total=552 [2024-11-28 05:14:07,674 INFO L87 Difference]: Start difference. First operand 172 states and 208 transitions. Second operand has 22 states, 20 states have (on average 3.0) internal successors, (60), 16 states have internal predecessors, (60), 6 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2024-11-28 05:14:13,034 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 05:14:17,045 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 05:14:17,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:14:17,313 INFO L93 Difference]: Finished difference Result 172 states and 205 transitions. [2024-11-28 05:14:17,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-28 05:14:17,314 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 3.0) internal successors, (60), 16 states have internal predecessors, (60), 6 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) Word has length 44 [2024-11-28 05:14:17,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:14:17,315 INFO L225 Difference]: With dead ends: 172 [2024-11-28 05:14:17,315 INFO L226 Difference]: Without dead ends: 172 [2024-11-28 05:14:17,316 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=109, Invalid=653, Unknown=2, NotChecked=106, Total=870 [2024-11-28 05:14:17,316 INFO L435 NwaCegarLoop]: 65 mSDtfsCounter, 30 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 13 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 203 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time [2024-11-28 05:14:17,316 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 492 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 220 Invalid, 2 Unknown, 203 Unchecked, 9.1s Time] [2024-11-28 05:14:17,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2024-11-28 05:14:17,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 165. [2024-11-28 05:14:17,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 139 states have (on average 1.330935251798561) internal successors, (185), 156 states have internal predecessors, (185), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-28 05:14:17,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 197 transitions. [2024-11-28 05:14:17,321 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 197 transitions. Word has length 44 [2024-11-28 05:14:17,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:14:17,322 INFO L471 AbstractCegarLoop]: Abstraction has 165 states and 197 transitions. [2024-11-28 05:14:17,322 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 3.0) internal successors, (60), 16 states have internal predecessors, (60), 6 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2024-11-28 05:14:17,322 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 197 transitions. [2024-11-28 05:14:17,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-28 05:14:17,323 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:14:17,323 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:14:17,336 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2024-11-28 05:14:17,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2024-11-28 05:14:17,724 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt [2024-11-28 05:14:17,724 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-28 05:14:17,724 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:14:17,724 INFO L85 PathProgramCache]: Analyzing trace with hash 308668209, now seen corresponding path program 1 times [2024-11-28 05:14:17,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 05:14:17,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [720083599] [2024-11-28 05:14:17,724 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:14:17,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:14:17,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:14:17,726 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:14:17,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-11-28 05:14:17,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:14:17,884 INFO L256 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-11-28 05:14:17,888 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:14:17,902 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 11 treesize of output 7 [2024-11-28 05:14:17,914 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 11 treesize of output 7 [2024-11-28 05:14:17,953 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 21 treesize of output 20 [2024-11-28 05:14:17,982 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 21 treesize of output 20 [2024-11-28 05:14:18,861 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-28 05:14:18,861 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 25 treesize of output 22 [2024-11-28 05:14:18,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 05:14:18,893 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 13 treesize of output 7 [2024-11-28 05:14:18,961 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-11-28 05:14:18,961 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2024-11-28 05:14:19,001 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 25 treesize of output 18 [2024-11-28 05:14:19,663 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base (_ BitVec 64))) (and (= (store |c_old(#memory_$Pointer$#0.offset)| alloc_and_zero_internal_~pi~1.base (select |c_#memory_$Pointer$#0.offset| alloc_and_zero_internal_~pi~1.base)) |c_#memory_$Pointer$#0.offset|) (= (_ bv0 1) (select |c_old(#valid)| alloc_and_zero_internal_~pi~1.base)) (= |c_#memory_$Pointer$#0.base| (store |c_old(#memory_$Pointer$#0.base)| alloc_and_zero_internal_~pi~1.base (select |c_#memory_$Pointer$#0.base| alloc_and_zero_internal_~pi~1.base))))) is different from true [2024-11-28 05:14:19,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 05:14:19,773 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 18 [2024-11-28 05:14:19,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 05:14:19,815 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 18 [2024-11-28 05:14:19,858 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 05:14:19,858 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 13 treesize of output 13 [2024-11-28 05:14:20,136 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 25 treesize of output 18 [2024-11-28 05:14:20,170 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 25 treesize of output 18 [2024-11-28 05:14:20,650 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:14:20,651 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 14 [2024-11-28 05:14:20,662 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 14 [2024-11-28 05:14:21,252 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 3 not checked. [2024-11-28 05:14:21,252 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:14:22,073 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse1 (bvadd (_ bv8 64) |c_ULTIMATE.start_create_~now~1#1.offset|))) (and (forall ((v_ArrVal_990 (Array (_ BitVec 64) (_ BitVec 64))) (|ULTIMATE.start_create_~shared~0#1.offset| (_ BitVec 64))) (= (_ bv0 64) (select (select (let ((.cse0 (store |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_create_internal_~now~0#1.base| v_ArrVal_990))) (store .cse0 |c_ULTIMATE.start_create_~now~1#1.base| (store (select .cse0 |c_ULTIMATE.start_create_~now~1#1.base|) .cse1 |ULTIMATE.start_create_~shared~0#1.offset|))) |c_ULTIMATE.start_create_~sll~1#1.base|) |c_ULTIMATE.start_create_~sll~1#1.offset|))) (forall ((v_ArrVal_991 (Array (_ BitVec 64) (_ BitVec 64))) (|ULTIMATE.start_create_~shared~0#1.base| (_ BitVec 64))) (= (_ bv0 64) (select (select (let ((.cse2 (store |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_create_internal_~now~0#1.base| v_ArrVal_991))) (store .cse2 |c_ULTIMATE.start_create_~now~1#1.base| (store (select .cse2 |c_ULTIMATE.start_create_~now~1#1.base|) .cse1 |ULTIMATE.start_create_~shared~0#1.base|))) |c_ULTIMATE.start_create_~sll~1#1.base|) |c_ULTIMATE.start_create_~sll~1#1.offset|))))) is different from false [2024-11-28 05:14:22,727 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 05:14:22,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720083599] [2024-11-28 05:14:22,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720083599] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:14:22,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1317533771] [2024-11-28 05:14:22,727 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:14:22,727 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-28 05:14:22,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 [2024-11-28 05:14:22,729 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-28 05:14:22,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_870a2ffb-a013-4892-8e0a-478dabdcc7b8/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2024-11-28 05:14:23,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:14:23,094 INFO L256 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-11-28 05:14:23,098 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:14:23,107 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 7 [2024-11-28 05:14:23,228 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 11 treesize of output 7 [2024-11-28 05:14:23,242 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 11 treesize of output 7 [2024-11-28 05:14:23,376 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 19 treesize of output 18 [2024-11-28 05:14:23,397 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 19 treesize of output 18 [2024-11-28 05:14:24,741 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 05:14:24,741 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 13 treesize of output 13 [2024-11-28 05:14:24,754 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 23 treesize of output 16 [2024-11-28 05:14:24,786 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 23 treesize of output 16 [2024-11-28 05:14:25,584 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