./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/cstrncat-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/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_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrncat-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d8697c629a22dee8b5a51c26261db89d3e1115a5e0c1bc03fd54c09ffc3b9b0d --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 02:39:25,716 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 02:39:25,808 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-28 02:39:25,815 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 02:39:25,815 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 02:39:25,845 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 02:39:25,846 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 02:39:25,850 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 02:39:25,851 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 02:39:25,851 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 02:39:25,851 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 02:39:25,851 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 02:39:25,852 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 02:39:25,852 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 02:39:25,852 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 02:39:25,852 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 02:39:25,852 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 02:39:25,853 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 02:39:25,853 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 02:39:25,853 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 02:39:25,853 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-28 02:39:25,853 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-28 02:39:25,853 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-28 02:39:25,853 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 02:39:25,853 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-28 02:39:25,853 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-28 02:39:25,854 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 02:39:25,854 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 02:39:25,854 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 02:39:25,854 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 02:39:25,854 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 02:39:25,858 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 02:39:25,858 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 02:39:25,858 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 02:39:25,858 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 02:39:25,858 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 02:39:25,859 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 02:39:25,859 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 02:39:25,859 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 02:39:25,859 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 02:39:25,859 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 02:39:25,859 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 02:39:25,859 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 02:39:25,860 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 02:39:25,860 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 02:39:25,860 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 02:39:25,860 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 02:39:25,860 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_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d8697c629a22dee8b5a51c26261db89d3e1115a5e0c1bc03fd54c09ffc3b9b0d [2024-11-28 02:39:26,180 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 02:39:26,195 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 02:39:26,197 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 02:39:26,200 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 02:39:26,200 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 02:39:26,202 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/array-memsafety/cstrncat-alloca-2.i [2024-11-28 02:39:29,250 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/data/c9f0d8feb/37124d54986f47cab4ae6a3492c7d1dc/FLAGe5986c09c [2024-11-28 02:39:29,617 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 02:39:29,618 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/sv-benchmarks/c/array-memsafety/cstrncat-alloca-2.i [2024-11-28 02:39:29,633 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/data/c9f0d8feb/37124d54986f47cab4ae6a3492c7d1dc/FLAGe5986c09c [2024-11-28 02:39:29,818 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/data/c9f0d8feb/37124d54986f47cab4ae6a3492c7d1dc [2024-11-28 02:39:29,821 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 02:39:29,823 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 02:39:29,825 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 02:39:29,825 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 02:39:29,831 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 02:39:29,832 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:39:29" (1/1) ... [2024-11-28 02:39:29,833 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a79086f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:39:29, skipping insertion in model container [2024-11-28 02:39:29,834 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:39:29" (1/1) ... [2024-11-28 02:39:29,882 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 02:39:30,243 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-28 02:39:30,244 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-28 02:39:30,255 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 02:39:30,268 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 02:39:30,318 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 02:39:30,346 INFO L204 MainTranslator]: Completed translation [2024-11-28 02:39:30,347 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:39:30 WrapperNode [2024-11-28 02:39:30,347 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 02:39:30,349 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 02:39:30,349 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 02:39:30,349 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 02:39:30,357 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:39:30" (1/1) ... [2024-11-28 02:39:30,370 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:39:30" (1/1) ... [2024-11-28 02:39:30,393 INFO L138 Inliner]: procedures = 117, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 108 [2024-11-28 02:39:30,393 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 02:39:30,394 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 02:39:30,394 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 02:39:30,394 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 02:39:30,404 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:39:30" (1/1) ... [2024-11-28 02:39:30,404 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:39:30" (1/1) ... [2024-11-28 02:39:30,407 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:39:30" (1/1) ... [2024-11-28 02:39:30,424 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [6, 3]. 67 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0, 0]. The 6 writes are split as follows [4, 2]. [2024-11-28 02:39:30,424 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:39:30" (1/1) ... [2024-11-28 02:39:30,424 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:39:30" (1/1) ... [2024-11-28 02:39:30,432 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:39:30" (1/1) ... [2024-11-28 02:39:30,433 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:39:30" (1/1) ... [2024-11-28 02:39:30,437 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:39:30" (1/1) ... [2024-11-28 02:39:30,438 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:39:30" (1/1) ... [2024-11-28 02:39:30,440 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:39:30" (1/1) ... [2024-11-28 02:39:30,442 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 02:39:30,443 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 02:39:30,443 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 02:39:30,443 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 02:39:30,444 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:39:30" (1/1) ... [2024-11-28 02:39:30,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 02:39:30,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:39:30,487 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 02:39:30,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 02:39:30,525 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-28 02:39:30,525 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-28 02:39:30,525 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-28 02:39:30,525 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-28 02:39:30,525 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-28 02:39:30,525 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-28 02:39:30,525 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 02:39:30,526 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 02:39:30,662 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 02:39:30,666 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 02:39:31,043 INFO L? ?]: Removed 69 outVars from TransFormulas that were not future-live. [2024-11-28 02:39:31,043 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 02:39:31,058 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 02:39:31,058 INFO L312 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-28 02:39:31,059 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:39:31 BoogieIcfgContainer [2024-11-28 02:39:31,060 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 02:39:31,063 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 02:39:31,063 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 02:39:31,069 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 02:39:31,070 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 02:39:29" (1/3) ... [2024-11-28 02:39:31,071 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75becba4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:39:31, skipping insertion in model container [2024-11-28 02:39:31,071 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:39:30" (2/3) ... [2024-11-28 02:39:31,072 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75becba4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:39:31, skipping insertion in model container [2024-11-28 02:39:31,073 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:39:31" (3/3) ... [2024-11-28 02:39:31,074 INFO L128 eAbstractionObserver]: Analyzing ICFG cstrncat-alloca-2.i [2024-11-28 02:39:31,091 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 02:39:31,095 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG cstrncat-alloca-2.i that has 1 procedures, 56 locations, 1 initial locations, 4 loop locations, and 19 error locations. [2024-11-28 02:39:31,139 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 02:39:31,152 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;@6ed0dbae, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 02:39:31,152 INFO L334 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2024-11-28 02:39:31,156 INFO L276 IsEmpty]: Start isEmpty. Operand has 56 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 55 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:31,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-28 02:39:31,162 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:39:31,162 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:39:31,163 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:39:31,168 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:39:31,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1805031120, now seen corresponding path program 1 times [2024-11-28 02:39:31,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:39:31,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379271686] [2024-11-28 02:39:31,178 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:39:31,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:39:31,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:39:31,376 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 02:39:31,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:39:31,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379271686] [2024-11-28 02:39:31,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379271686] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:39:31,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:39:31,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 02:39:31,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905351969] [2024-11-28 02:39:31,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:39:31,390 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 02:39:31,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:39:31,424 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 02:39:31,425 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 02:39:31,427 INFO L87 Difference]: Start difference. First operand has 56 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 55 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:31,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:39:31,524 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2024-11-28 02:39:31,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 02:39:31,527 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-28 02:39:31,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:39:31,534 INFO L225 Difference]: With dead ends: 57 [2024-11-28 02:39:31,535 INFO L226 Difference]: Without dead ends: 54 [2024-11-28 02:39:31,538 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 02:39:31,541 INFO L435 NwaCegarLoop]: 63 mSDtfsCounter, 3 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:39:31,542 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 97 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:39:31,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-11-28 02:39:31,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2024-11-28 02:39:31,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 35 states have (on average 1.7714285714285714) internal successors, (62), 53 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:31,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2024-11-28 02:39:31,594 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 7 [2024-11-28 02:39:31,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:39:31,595 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2024-11-28 02:39:31,595 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:31,595 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2024-11-28 02:39:31,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-28 02:39:31,597 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:39:31,597 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:39:31,598 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-28 02:39:31,598 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:39:31,599 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:39:31,599 INFO L85 PathProgramCache]: Analyzing trace with hash -531912816, now seen corresponding path program 1 times [2024-11-28 02:39:31,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:39:31,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170960407] [2024-11-28 02:39:31,600 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:39:31,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:39:31,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:39:31,774 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 02:39:31,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:39:31,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170960407] [2024-11-28 02:39:31,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170960407] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:39:31,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:39:31,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 02:39:31,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790285465] [2024-11-28 02:39:31,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:39:31,776 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 02:39:31,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:39:31,777 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 02:39:31,777 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 02:39:31,778 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:31,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:39:31,898 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2024-11-28 02:39:31,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 02:39:31,899 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-11-28 02:39:31,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:39:31,899 INFO L225 Difference]: With dead ends: 57 [2024-11-28 02:39:31,899 INFO L226 Difference]: Without dead ends: 54 [2024-11-28 02:39:31,900 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-11-28 02:39:31,901 INFO L435 NwaCegarLoop]: 62 mSDtfsCounter, 6 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:39:31,901 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 209 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:39:31,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-11-28 02:39:31,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2024-11-28 02:39:31,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 53 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:31,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2024-11-28 02:39:31,906 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 9 [2024-11-28 02:39:31,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:39:31,907 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2024-11-28 02:39:31,907 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:31,907 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2024-11-28 02:39:31,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-28 02:39:31,907 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:39:31,907 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:39:31,908 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-28 02:39:31,908 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:39:31,908 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:39:31,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1243094546, now seen corresponding path program 1 times [2024-11-28 02:39:31,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:39:31,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137551041] [2024-11-28 02:39:31,909 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:39:31,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:39:31,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:39:32,121 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 02:39:32,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:39:32,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137551041] [2024-11-28 02:39:32,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137551041] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:39:32,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:39:32,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 02:39:32,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121719181] [2024-11-28 02:39:32,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:39:32,123 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 02:39:32,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:39:32,124 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 02:39:32,124 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 02:39:32,124 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:32,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:39:32,194 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2024-11-28 02:39:32,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 02:39:32,194 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-11-28 02:39:32,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:39:32,195 INFO L225 Difference]: With dead ends: 52 [2024-11-28 02:39:32,195 INFO L226 Difference]: Without dead ends: 52 [2024-11-28 02:39:32,195 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 02:39:32,196 INFO L435 NwaCegarLoop]: 50 mSDtfsCounter, 16 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:39:32,197 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 73 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:39:32,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-11-28 02:39:32,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2024-11-28 02:39:32,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 51 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:32,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2024-11-28 02:39:32,204 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 9 [2024-11-28 02:39:32,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:39:32,205 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2024-11-28 02:39:32,205 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:32,205 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2024-11-28 02:39:32,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-28 02:39:32,205 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:39:32,205 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:39:32,206 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-28 02:39:32,206 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:39:32,206 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:39:32,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1243094547, now seen corresponding path program 1 times [2024-11-28 02:39:32,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:39:32,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768125032] [2024-11-28 02:39:32,208 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:39:32,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:39:32,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:39:32,647 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 02:39:32,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:39:32,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768125032] [2024-11-28 02:39:32,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768125032] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:39:32,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:39:32,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 02:39:32,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748214293] [2024-11-28 02:39:32,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:39:32,648 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 02:39:32,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:39:32,649 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 02:39:32,649 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-28 02:39:32,649 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:32,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:39:32,849 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2024-11-28 02:39:32,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 02:39:32,851 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-11-28 02:39:32,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:39:32,852 INFO L225 Difference]: With dead ends: 56 [2024-11-28 02:39:32,852 INFO L226 Difference]: Without dead ends: 56 [2024-11-28 02:39:32,852 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-11-28 02:39:32,853 INFO L435 NwaCegarLoop]: 51 mSDtfsCounter, 26 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:39:32,853 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 186 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:39:32,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-11-28 02:39:32,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2024-11-28 02:39:32,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 38 states have (on average 1.6578947368421053) internal successors, (63), 54 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:32,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2024-11-28 02:39:32,864 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 9 [2024-11-28 02:39:32,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:39:32,866 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2024-11-28 02:39:32,867 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:32,867 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2024-11-28 02:39:32,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-28 02:39:32,867 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:39:32,867 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:39:32,867 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-28 02:39:32,867 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:39:32,868 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:39:32,868 INFO L85 PathProgramCache]: Analyzing trace with hash 615049018, now seen corresponding path program 1 times [2024-11-28 02:39:32,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:39:32,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50514909] [2024-11-28 02:39:32,868 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:39:32,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:39:32,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:39:32,954 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 02:39:32,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:39:32,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50514909] [2024-11-28 02:39:32,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50514909] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:39:32,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:39:32,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 02:39:32,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042920048] [2024-11-28 02:39:32,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:39:32,957 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 02:39:32,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:39:32,958 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 02:39:32,958 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-28 02:39:32,958 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:32,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:39:32,994 INFO L93 Difference]: Finished difference Result 72 states and 84 transitions. [2024-11-28 02:39:32,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 02:39:32,995 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-28 02:39:32,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:39:32,995 INFO L225 Difference]: With dead ends: 72 [2024-11-28 02:39:32,996 INFO L226 Difference]: Without dead ends: 72 [2024-11-28 02:39:32,996 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-28 02:39:32,996 INFO L435 NwaCegarLoop]: 55 mSDtfsCounter, 11 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 02:39:32,997 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 117 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 02:39:32,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-11-28 02:39:33,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 66. [2024-11-28 02:39:33,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 49 states have (on average 1.5918367346938775) internal successors, (78), 65 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:33,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 78 transitions. [2024-11-28 02:39:33,011 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 78 transitions. Word has length 11 [2024-11-28 02:39:33,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:39:33,012 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 78 transitions. [2024-11-28 02:39:33,012 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:33,012 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 78 transitions. [2024-11-28 02:39:33,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-28 02:39:33,012 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:39:33,012 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:39:33,012 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-28 02:39:33,013 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:39:33,013 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:39:33,013 INFO L85 PathProgramCache]: Analyzing trace with hash 615051197, now seen corresponding path program 1 times [2024-11-28 02:39:33,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:39:33,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942435230] [2024-11-28 02:39:33,013 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:39:33,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:39:33,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:39:33,407 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 02:39:33,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:39:33,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942435230] [2024-11-28 02:39:33,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942435230] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:39:33,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:39:33,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 02:39:33,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073386374] [2024-11-28 02:39:33,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:39:33,408 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 02:39:33,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:39:33,408 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 02:39:33,409 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-28 02:39:33,409 INFO L87 Difference]: Start difference. First operand 66 states and 78 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:33,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:39:33,697 INFO L93 Difference]: Finished difference Result 109 states and 130 transitions. [2024-11-28 02:39:33,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 02:39:33,698 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-28 02:39:33,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:39:33,698 INFO L225 Difference]: With dead ends: 109 [2024-11-28 02:39:33,698 INFO L226 Difference]: Without dead ends: 109 [2024-11-28 02:39:33,699 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-11-28 02:39:33,699 INFO L435 NwaCegarLoop]: 46 mSDtfsCounter, 63 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 02:39:33,700 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 157 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 02:39:33,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2024-11-28 02:39:33,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 79. [2024-11-28 02:39:33,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 62 states have (on average 1.5483870967741935) internal successors, (96), 78 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:33,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 96 transitions. [2024-11-28 02:39:33,713 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 96 transitions. Word has length 11 [2024-11-28 02:39:33,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:39:33,714 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 96 transitions. [2024-11-28 02:39:33,714 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:33,714 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 96 transitions. [2024-11-28 02:39:33,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-28 02:39:33,716 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:39:33,717 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:39:33,717 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-28 02:39:33,717 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:39:33,717 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:39:33,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1904908737, now seen corresponding path program 1 times [2024-11-28 02:39:33,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:39:33,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520864586] [2024-11-28 02:39:33,718 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:39:33,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:39:33,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:39:34,035 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 02:39:34,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:39:34,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520864586] [2024-11-28 02:39:34,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520864586] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:39:34,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:39:34,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 02:39:34,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132952000] [2024-11-28 02:39:34,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:39:34,036 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 02:39:34,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:39:34,037 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 02:39:34,037 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-28 02:39:34,037 INFO L87 Difference]: Start difference. First operand 79 states and 96 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:34,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:39:34,108 INFO L93 Difference]: Finished difference Result 78 states and 95 transitions. [2024-11-28 02:39:34,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 02:39:34,110 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-28 02:39:34,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:39:34,110 INFO L225 Difference]: With dead ends: 78 [2024-11-28 02:39:34,110 INFO L226 Difference]: Without dead ends: 78 [2024-11-28 02:39:34,111 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-11-28 02:39:34,112 INFO L435 NwaCegarLoop]: 47 mSDtfsCounter, 39 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 02:39:34,112 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 84 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 02:39:34,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-11-28 02:39:34,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 65. [2024-11-28 02:39:34,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 49 states have (on average 1.5714285714285714) internal successors, (77), 64 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:34,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 77 transitions. [2024-11-28 02:39:34,120 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 77 transitions. Word has length 11 [2024-11-28 02:39:34,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:39:34,123 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 77 transitions. [2024-11-28 02:39:34,123 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:34,123 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 77 transitions. [2024-11-28 02:39:34,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-28 02:39:34,124 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:39:34,124 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:39:34,124 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-28 02:39:34,124 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:39:34,126 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:39:34,126 INFO L85 PathProgramCache]: Analyzing trace with hash -194297608, now seen corresponding path program 1 times [2024-11-28 02:39:34,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:39:34,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276145573] [2024-11-28 02:39:34,126 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:39:34,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:39:34,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:39:34,175 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 02:39:34,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:39:34,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276145573] [2024-11-28 02:39:34,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276145573] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:39:34,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:39:34,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 02:39:34,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128738060] [2024-11-28 02:39:34,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:39:34,176 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 02:39:34,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:39:34,176 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 02:39:34,176 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 02:39:34,177 INFO L87 Difference]: Start difference. First operand 65 states and 77 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:34,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:39:34,212 INFO L93 Difference]: Finished difference Result 63 states and 75 transitions. [2024-11-28 02:39:34,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 02:39:34,212 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-28 02:39:34,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:39:34,213 INFO L225 Difference]: With dead ends: 63 [2024-11-28 02:39:34,213 INFO L226 Difference]: Without dead ends: 63 [2024-11-28 02:39:34,213 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 02:39:34,214 INFO L435 NwaCegarLoop]: 49 mSDtfsCounter, 11 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 02:39:34,214 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 72 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 02:39:34,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-11-28 02:39:34,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2024-11-28 02:39:34,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 49 states have (on average 1.530612244897959) internal successors, (75), 62 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:34,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 75 transitions. [2024-11-28 02:39:34,218 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 75 transitions. Word has length 11 [2024-11-28 02:39:34,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:39:34,219 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 75 transitions. [2024-11-28 02:39:34,219 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:34,219 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 75 transitions. [2024-11-28 02:39:34,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-28 02:39:34,219 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:39:34,219 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:39:34,219 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-28 02:39:34,220 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:39:34,220 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:39:34,220 INFO L85 PathProgramCache]: Analyzing trace with hash -194297607, now seen corresponding path program 1 times [2024-11-28 02:39:34,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:39:34,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326649377] [2024-11-28 02:39:34,220 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:39:34,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:39:34,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:39:34,317 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 02:39:34,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:39:34,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326649377] [2024-11-28 02:39:34,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326649377] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:39:34,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:39:34,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 02:39:34,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46915510] [2024-11-28 02:39:34,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:39:34,318 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 02:39:34,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:39:34,319 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 02:39:34,319 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-28 02:39:34,319 INFO L87 Difference]: Start difference. First operand 63 states and 75 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:34,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:39:34,391 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2024-11-28 02:39:34,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 02:39:34,392 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-28 02:39:34,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:39:34,393 INFO L225 Difference]: With dead ends: 71 [2024-11-28 02:39:34,393 INFO L226 Difference]: Without dead ends: 71 [2024-11-28 02:39:34,393 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-28 02:39:34,394 INFO L435 NwaCegarLoop]: 48 mSDtfsCounter, 22 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:39:34,394 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 135 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:39:34,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-11-28 02:39:34,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 63. [2024-11-28 02:39:34,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 49 states have (on average 1.530612244897959) internal successors, (75), 62 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:34,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 75 transitions. [2024-11-28 02:39:34,398 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 75 transitions. Word has length 11 [2024-11-28 02:39:34,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:39:34,398 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 75 transitions. [2024-11-28 02:39:34,398 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:34,398 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 75 transitions. [2024-11-28 02:39:34,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-28 02:39:34,399 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:39:34,399 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:39:34,399 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-28 02:39:34,399 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:39:34,399 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:39:34,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1886717928, now seen corresponding path program 1 times [2024-11-28 02:39:34,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:39:34,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928195712] [2024-11-28 02:39:34,400 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:39:34,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:39:34,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:39:34,559 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 02:39:34,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:39:34,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928195712] [2024-11-28 02:39:34,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928195712] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:39:34,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:39:34,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 02:39:34,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990356834] [2024-11-28 02:39:34,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:39:34,560 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 02:39:34,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:39:34,561 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 02:39:34,561 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-28 02:39:34,561 INFO L87 Difference]: Start difference. First operand 63 states and 75 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:34,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:39:34,628 INFO L93 Difference]: Finished difference Result 69 states and 80 transitions. [2024-11-28 02:39:34,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 02:39:34,629 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-11-28 02:39:34,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:39:34,630 INFO L225 Difference]: With dead ends: 69 [2024-11-28 02:39:34,630 INFO L226 Difference]: Without dead ends: 69 [2024-11-28 02:39:34,630 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-28 02:39:34,631 INFO L435 NwaCegarLoop]: 50 mSDtfsCounter, 6 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 130 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 02:39:34,632 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 130 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:39:34,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-11-28 02:39:34,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2024-11-28 02:39:34,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 54 states have (on average 1.4814814814814814) internal successors, (80), 67 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:34,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 80 transitions. [2024-11-28 02:39:34,640 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 80 transitions. Word has length 12 [2024-11-28 02:39:34,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:39:34,640 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 80 transitions. [2024-11-28 02:39:34,641 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:34,641 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 80 transitions. [2024-11-28 02:39:34,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-28 02:39:34,641 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:39:34,641 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:39:34,641 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-28 02:39:34,642 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:39:34,642 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:39:34,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1728190998, now seen corresponding path program 1 times [2024-11-28 02:39:34,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:39:34,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674434637] [2024-11-28 02:39:34,644 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:39:34,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:39:34,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:39:34,911 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 02:39:34,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:39:34,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674434637] [2024-11-28 02:39:34,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674434637] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:39:34,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:39:34,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 02:39:34,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704143931] [2024-11-28 02:39:34,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:39:34,912 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 02:39:34,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:39:34,913 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 02:39:34,913 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-28 02:39:34,913 INFO L87 Difference]: Start difference. First operand 68 states and 80 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:35,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:39:35,016 INFO L93 Difference]: Finished difference Result 78 states and 90 transitions. [2024-11-28 02:39:35,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 02:39:35,016 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-11-28 02:39:35,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:39:35,017 INFO L225 Difference]: With dead ends: 78 [2024-11-28 02:39:35,018 INFO L226 Difference]: Without dead ends: 78 [2024-11-28 02:39:35,018 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-28 02:39:35,018 INFO L435 NwaCegarLoop]: 46 mSDtfsCounter, 20 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:39:35,019 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 134 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:39:35,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-11-28 02:39:35,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 66. [2024-11-28 02:39:35,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 52 states have (on average 1.5) internal successors, (78), 65 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:35,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 78 transitions. [2024-11-28 02:39:35,023 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 78 transitions. Word has length 12 [2024-11-28 02:39:35,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:39:35,023 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 78 transitions. [2024-11-28 02:39:35,023 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:35,023 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 78 transitions. [2024-11-28 02:39:35,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-28 02:39:35,023 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:39:35,024 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:39:35,024 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-28 02:39:35,024 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:39:35,024 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:39:35,024 INFO L85 PathProgramCache]: Analyzing trace with hash 635101388, now seen corresponding path program 1 times [2024-11-28 02:39:35,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:39:35,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589028150] [2024-11-28 02:39:35,024 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:39:35,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:39:35,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:39:35,399 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:39:35,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:39:35,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589028150] [2024-11-28 02:39:35,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589028150] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:39:35,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875303063] [2024-11-28 02:39:35,400 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:39:35,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:39:35,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:39:35,402 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:39:35,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 02:39:35,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:39:35,473 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-28 02:39:35,478 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:39:35,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:39:35,589 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 13 treesize of output 7 [2024-11-28 02:39:35,601 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 10 treesize of output 8 [2024-11-28 02:39:35,942 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 02:39:35,942 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:39:36,218 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 02:39:36,315 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:39:36,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875303063] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:39:36,315 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:39:36,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2024-11-28 02:39:36,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385361789] [2024-11-28 02:39:36,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:39:36,316 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-28 02:39:36,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:39:36,317 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-28 02:39:36,318 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2024-11-28 02:39:36,318 INFO L87 Difference]: Start difference. First operand 66 states and 78 transitions. Second operand has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:36,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:39:36,609 INFO L93 Difference]: Finished difference Result 69 states and 82 transitions. [2024-11-28 02:39:36,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 02:39:36,610 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-11-28 02:39:36,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:39:36,610 INFO L225 Difference]: With dead ends: 69 [2024-11-28 02:39:36,610 INFO L226 Difference]: Without dead ends: 69 [2024-11-28 02:39:36,611 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2024-11-28 02:39:36,613 INFO L435 NwaCegarLoop]: 49 mSDtfsCounter, 23 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 02:39:36,613 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 337 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 02:39:36,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-11-28 02:39:36,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 60. [2024-11-28 02:39:36,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 47 states have (on average 1.4893617021276595) internal successors, (70), 59 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:36,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2024-11-28 02:39:36,619 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 13 [2024-11-28 02:39:36,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:39:36,619 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2024-11-28 02:39:36,620 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:36,620 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2024-11-28 02:39:36,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-28 02:39:36,620 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:39:36,620 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:39:36,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-28 02:39:36,821 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-28 02:39:36,821 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:39:36,821 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:39:36,821 INFO L85 PathProgramCache]: Analyzing trace with hash 659730155, now seen corresponding path program 1 times [2024-11-28 02:39:36,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:39:36,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276890280] [2024-11-28 02:39:36,822 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:39:36,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:39:36,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:39:36,881 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 02:39:36,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:39:36,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276890280] [2024-11-28 02:39:36,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276890280] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:39:36,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:39:36,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 02:39:36,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525919311] [2024-11-28 02:39:36,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:39:36,882 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 02:39:36,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:39:36,883 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 02:39:36,883 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 02:39:36,883 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:36,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:39:36,940 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2024-11-28 02:39:36,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 02:39:36,941 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-11-28 02:39:36,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:39:36,943 INFO L225 Difference]: With dead ends: 58 [2024-11-28 02:39:36,943 INFO L226 Difference]: Without dead ends: 58 [2024-11-28 02:39:36,943 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 02:39:36,944 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 31 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:39:36,945 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 68 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:39:36,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-11-28 02:39:36,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2024-11-28 02:39:36,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 47 states have (on average 1.4042553191489362) internal successors, (66), 55 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:36,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2024-11-28 02:39:36,951 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 14 [2024-11-28 02:39:36,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:39:36,951 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2024-11-28 02:39:36,951 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:36,951 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2024-11-28 02:39:36,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-28 02:39:36,952 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:39:36,952 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:39:36,952 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-28 02:39:36,952 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:39:36,952 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:39:36,952 INFO L85 PathProgramCache]: Analyzing trace with hash 659730156, now seen corresponding path program 1 times [2024-11-28 02:39:36,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:39:36,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935348383] [2024-11-28 02:39:36,953 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:39:36,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:39:36,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:39:37,106 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 02:39:37,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:39:37,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935348383] [2024-11-28 02:39:37,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935348383] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:39:37,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:39:37,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 02:39:37,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415788225] [2024-11-28 02:39:37,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:39:37,107 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 02:39:37,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:39:37,109 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 02:39:37,109 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-28 02:39:37,109 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:37,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:39:37,259 INFO L93 Difference]: Finished difference Result 82 states and 97 transitions. [2024-11-28 02:39:37,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 02:39:37,261 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-11-28 02:39:37,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:39:37,262 INFO L225 Difference]: With dead ends: 82 [2024-11-28 02:39:37,262 INFO L226 Difference]: Without dead ends: 82 [2024-11-28 02:39:37,262 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-11-28 02:39:37,263 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 55 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:39:37,263 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 127 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:39:37,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-11-28 02:39:37,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 67. [2024-11-28 02:39:37,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 58 states have (on average 1.4310344827586208) internal successors, (83), 66 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:37,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 83 transitions. [2024-11-28 02:39:37,268 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 83 transitions. Word has length 14 [2024-11-28 02:39:37,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:39:37,269 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 83 transitions. [2024-11-28 02:39:37,269 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:37,269 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 83 transitions. [2024-11-28 02:39:37,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-28 02:39:37,269 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:39:37,269 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:39:37,270 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-28 02:39:37,270 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:39:37,270 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:39:37,270 INFO L85 PathProgramCache]: Analyzing trace with hash 707340914, now seen corresponding path program 1 times [2024-11-28 02:39:37,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:39:37,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382453644] [2024-11-28 02:39:37,272 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:39:37,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:39:37,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:39:37,539 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 02:39:37,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:39:37,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382453644] [2024-11-28 02:39:37,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382453644] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:39:37,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657906566] [2024-11-28 02:39:37,540 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:39:37,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:39:37,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:39:37,542 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:39:37,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 02:39:37,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:39:37,614 INFO L256 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-28 02:39:37,618 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:39:37,655 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 13 treesize of output 1 [2024-11-28 02:39:37,838 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 02:39:37,838 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:39:38,065 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 02:39:38,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657906566] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:39:38,065 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:39:38,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2024-11-28 02:39:38,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308607846] [2024-11-28 02:39:38,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:39:38,066 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-28 02:39:38,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:39:38,066 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-28 02:39:38,066 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2024-11-28 02:39:38,066 INFO L87 Difference]: Start difference. First operand 67 states and 83 transitions. Second operand has 16 states, 15 states have (on average 2.2) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:38,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:39:38,360 INFO L93 Difference]: Finished difference Result 123 states and 153 transitions. [2024-11-28 02:39:38,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-28 02:39:38,361 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-11-28 02:39:38,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:39:38,361 INFO L225 Difference]: With dead ends: 123 [2024-11-28 02:39:38,361 INFO L226 Difference]: Without dead ends: 123 [2024-11-28 02:39:38,362 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2024-11-28 02:39:38,362 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 70 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 02:39:38,362 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 130 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 02:39:38,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2024-11-28 02:39:38,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 88. [2024-11-28 02:39:38,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 79 states have (on average 1.379746835443038) internal successors, (109), 87 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:38,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 109 transitions. [2024-11-28 02:39:38,369 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 109 transitions. Word has length 15 [2024-11-28 02:39:38,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:39:38,370 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 109 transitions. [2024-11-28 02:39:38,370 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.2) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:38,370 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 109 transitions. [2024-11-28 02:39:38,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-28 02:39:38,370 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:39:38,371 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:39:38,381 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-28 02:39:38,574 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-28 02:39:38,575 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:39:38,575 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:39:38,575 INFO L85 PathProgramCache]: Analyzing trace with hash 452799377, now seen corresponding path program 1 times [2024-11-28 02:39:38,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:39:38,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206822146] [2024-11-28 02:39:38,575 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:39:38,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:39:38,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:39:38,779 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 02:39:38,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:39:38,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206822146] [2024-11-28 02:39:38,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206822146] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:39:38,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:39:38,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 02:39:38,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416565172] [2024-11-28 02:39:38,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:39:38,780 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 02:39:38,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:39:38,780 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 02:39:38,781 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-11-28 02:39:38,781 INFO L87 Difference]: Start difference. First operand 88 states and 109 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:38,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:39:38,875 INFO L93 Difference]: Finished difference Result 99 states and 123 transitions. [2024-11-28 02:39:38,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 02:39:38,876 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-11-28 02:39:38,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:39:38,876 INFO L225 Difference]: With dead ends: 99 [2024-11-28 02:39:38,876 INFO L226 Difference]: Without dead ends: 99 [2024-11-28 02:39:38,877 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-11-28 02:39:38,877 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 21 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:39:38,877 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 124 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:39:38,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-11-28 02:39:38,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 90. [2024-11-28 02:39:38,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 81 states have (on average 1.3950617283950617) internal successors, (113), 89 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:38,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 113 transitions. [2024-11-28 02:39:38,882 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 113 transitions. Word has length 16 [2024-11-28 02:39:38,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:39:38,882 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 113 transitions. [2024-11-28 02:39:38,883 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:38,883 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 113 transitions. [2024-11-28 02:39:38,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-28 02:39:38,884 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:39:38,884 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:39:38,884 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-28 02:39:38,885 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:39:38,885 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:39:38,885 INFO L85 PathProgramCache]: Analyzing trace with hash 250747900, now seen corresponding path program 1 times [2024-11-28 02:39:38,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:39:38,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156195980] [2024-11-28 02:39:38,885 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:39:38,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:39:38,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:39:39,254 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 02:39:39,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:39:39,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156195980] [2024-11-28 02:39:39,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156195980] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:39:39,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024759513] [2024-11-28 02:39:39,255 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:39:39,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:39:39,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:39:39,257 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:39:39,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 02:39:39,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:39:39,334 INFO L256 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-28 02:39:39,340 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:39:39,405 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 02:39:39,471 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 02:39:39,471 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 02:39:39,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024759513] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:39:39,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 02:39:39,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 14 [2024-11-28 02:39:39,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719144642] [2024-11-28 02:39:39,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:39:39,472 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-28 02:39:39,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:39:39,472 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-28 02:39:39,472 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2024-11-28 02:39:39,473 INFO L87 Difference]: Start difference. First operand 90 states and 113 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:39,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:39:39,635 INFO L93 Difference]: Finished difference Result 115 states and 142 transitions. [2024-11-28 02:39:39,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 02:39:39,636 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2024-11-28 02:39:39,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:39:39,636 INFO L225 Difference]: With dead ends: 115 [2024-11-28 02:39:39,636 INFO L226 Difference]: Without dead ends: 115 [2024-11-28 02:39:39,637 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2024-11-28 02:39:39,637 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 42 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 209 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 02:39:39,637 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 209 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:39:39,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2024-11-28 02:39:39,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 99. [2024-11-28 02:39:39,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 90 states have (on average 1.3666666666666667) internal successors, (123), 98 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:39,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 123 transitions. [2024-11-28 02:39:39,643 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 123 transitions. Word has length 17 [2024-11-28 02:39:39,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:39:39,643 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 123 transitions. [2024-11-28 02:39:39,643 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:39,643 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 123 transitions. [2024-11-28 02:39:39,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-28 02:39:39,643 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:39:39,643 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:39:39,652 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-28 02:39:39,844 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-28 02:39:39,844 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:39:39,844 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:39:39,845 INFO L85 PathProgramCache]: Analyzing trace with hash -816683756, now seen corresponding path program 1 times [2024-11-28 02:39:39,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:39:39,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188070224] [2024-11-28 02:39:39,845 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:39:39,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:39:39,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:39:39,922 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 02:39:39,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:39:39,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188070224] [2024-11-28 02:39:39,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188070224] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:39:39,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:39:39,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 02:39:39,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475352644] [2024-11-28 02:39:39,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:39:39,923 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 02:39:39,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:39:39,924 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 02:39:39,924 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 02:39:39,924 INFO L87 Difference]: Start difference. First operand 99 states and 123 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:39,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:39:39,986 INFO L93 Difference]: Finished difference Result 98 states and 121 transitions. [2024-11-28 02:39:39,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 02:39:39,986 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2024-11-28 02:39:39,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:39:39,987 INFO L225 Difference]: With dead ends: 98 [2024-11-28 02:39:39,987 INFO L226 Difference]: Without dead ends: 98 [2024-11-28 02:39:39,987 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-28 02:39:39,988 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 32 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:39:39,988 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 100 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:39:39,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-11-28 02:39:39,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2024-11-28 02:39:39,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 90 states have (on average 1.3444444444444446) internal successors, (121), 97 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:39,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 121 transitions. [2024-11-28 02:39:39,993 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 121 transitions. Word has length 18 [2024-11-28 02:39:39,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:39:39,993 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 121 transitions. [2024-11-28 02:39:39,994 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:39,994 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 121 transitions. [2024-11-28 02:39:39,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-28 02:39:39,994 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:39:39,995 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:39:39,995 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-28 02:39:39,995 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:39:39,996 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:39:39,996 INFO L85 PathProgramCache]: Analyzing trace with hash -816683755, now seen corresponding path program 1 times [2024-11-28 02:39:39,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:39:39,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722778530] [2024-11-28 02:39:39,996 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:39:39,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:39:40,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:39:40,206 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 02:39:40,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:39:40,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722778530] [2024-11-28 02:39:40,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722778530] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:39:40,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:39:40,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 02:39:40,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481142866] [2024-11-28 02:39:40,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:39:40,207 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 02:39:40,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:39:40,208 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 02:39:40,208 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-28 02:39:40,208 INFO L87 Difference]: Start difference. First operand 98 states and 121 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:40,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:39:40,320 INFO L93 Difference]: Finished difference Result 118 states and 146 transitions. [2024-11-28 02:39:40,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 02:39:40,321 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2024-11-28 02:39:40,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:39:40,322 INFO L225 Difference]: With dead ends: 118 [2024-11-28 02:39:40,322 INFO L226 Difference]: Without dead ends: 118 [2024-11-28 02:39:40,322 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-28 02:39:40,322 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 39 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:39:40,323 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 139 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:39:40,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2024-11-28 02:39:40,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 104. [2024-11-28 02:39:40,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 96 states have (on average 1.34375) internal successors, (129), 103 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:40,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 129 transitions. [2024-11-28 02:39:40,326 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 129 transitions. Word has length 18 [2024-11-28 02:39:40,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:39:40,326 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 129 transitions. [2024-11-28 02:39:40,327 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:40,327 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 129 transitions. [2024-11-28 02:39:40,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-28 02:39:40,327 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:39:40,327 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] [2024-11-28 02:39:40,327 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-28 02:39:40,328 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:39:40,328 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:39:40,328 INFO L85 PathProgramCache]: Analyzing trace with hash 895169272, now seen corresponding path program 1 times [2024-11-28 02:39:40,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:39:40,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643691067] [2024-11-28 02:39:40,329 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:39:40,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:39:40,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:39:40,661 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 02:39:40,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:39:40,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643691067] [2024-11-28 02:39:40,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643691067] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:39:40,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79119266] [2024-11-28 02:39:40,662 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:39:40,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:39:40,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:39:40,664 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:39:40,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 02:39:40,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:39:40,743 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-28 02:39:40,745 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:39:40,770 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 13 treesize of output 7 [2024-11-28 02:39:40,778 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 1 [2024-11-28 02:39:41,022 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 02:39:41,022 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:39:41,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:39:41,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79119266] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-28 02:39:41,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-28 02:39:41,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 6] total 15 [2024-11-28 02:39:41,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229883943] [2024-11-28 02:39:41,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:39:41,316 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 02:39:41,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:39:41,316 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 02:39:41,316 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2024-11-28 02:39:41,316 INFO L87 Difference]: Start difference. First operand 104 states and 129 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:41,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:39:41,541 INFO L93 Difference]: Finished difference Result 107 states and 133 transitions. [2024-11-28 02:39:41,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 02:39:41,542 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2024-11-28 02:39:41,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:39:41,543 INFO L225 Difference]: With dead ends: 107 [2024-11-28 02:39:41,543 INFO L226 Difference]: Without dead ends: 107 [2024-11-28 02:39:41,543 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=117, Invalid=263, Unknown=0, NotChecked=0, Total=380 [2024-11-28 02:39:41,544 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 29 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:39:41,544 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 134 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:39:41,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2024-11-28 02:39:41,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 98. [2024-11-28 02:39:41,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 91 states have (on average 1.3296703296703296) internal successors, (121), 97 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:41,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 121 transitions. [2024-11-28 02:39:41,552 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 121 transitions. Word has length 20 [2024-11-28 02:39:41,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:39:41,552 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 121 transitions. [2024-11-28 02:39:41,552 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:41,552 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 121 transitions. [2024-11-28 02:39:41,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-28 02:39:41,556 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:39:41,556 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] [2024-11-28 02:39:41,565 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-28 02:39:41,759 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:39:41,760 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:39:41,760 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:39:41,760 INFO L85 PathProgramCache]: Analyzing trace with hash 172430773, now seen corresponding path program 1 times [2024-11-28 02:39:41,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:39:41,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741416816] [2024-11-28 02:39:41,760 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:39:41,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:39:41,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:39:41,957 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:39:41,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:39:41,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741416816] [2024-11-28 02:39:41,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741416816] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:39:41,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082876628] [2024-11-28 02:39:41,958 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:39:41,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:39:41,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:39:41,960 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:39:41,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 02:39:42,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:39:42,039 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-28 02:39:42,041 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:39:42,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:39:42,170 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:39:42,255 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 23 treesize of output 19 [2024-11-28 02:39:42,335 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:39:42,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082876628] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:39:42,335 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:39:42,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 16 [2024-11-28 02:39:42,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636056080] [2024-11-28 02:39:42,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:39:42,336 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-28 02:39:42,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:39:42,337 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-28 02:39:42,337 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2024-11-28 02:39:42,337 INFO L87 Difference]: Start difference. First operand 98 states and 121 transitions. Second operand has 17 states, 16 states have (on average 3.25) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:42,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:39:42,593 INFO L93 Difference]: Finished difference Result 147 states and 183 transitions. [2024-11-28 02:39:42,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 02:39:42,593 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.25) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2024-11-28 02:39:42,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:39:42,594 INFO L225 Difference]: With dead ends: 147 [2024-11-28 02:39:42,594 INFO L226 Difference]: Without dead ends: 147 [2024-11-28 02:39:42,595 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2024-11-28 02:39:42,596 INFO L435 NwaCegarLoop]: 64 mSDtfsCounter, 78 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 02:39:42,596 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 393 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 02:39:42,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2024-11-28 02:39:42,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 108. [2024-11-28 02:39:42,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 102 states have (on average 1.3235294117647058) internal successors, (135), 107 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:42,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 135 transitions. [2024-11-28 02:39:42,600 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 135 transitions. Word has length 21 [2024-11-28 02:39:42,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:39:42,600 INFO L471 AbstractCegarLoop]: Abstraction has 108 states and 135 transitions. [2024-11-28 02:39:42,600 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.25) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:42,600 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 135 transitions. [2024-11-28 02:39:42,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-28 02:39:42,600 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:39:42,601 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:39:42,609 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-28 02:39:42,804 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:39:42,805 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:39:42,806 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:39:42,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1685056393, now seen corresponding path program 1 times [2024-11-28 02:39:42,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:39:42,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26351755] [2024-11-28 02:39:42,806 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:39:42,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:39:42,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:39:42,841 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:39:42,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:39:42,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26351755] [2024-11-28 02:39:42,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26351755] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:39:42,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:39:42,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 02:39:42,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887208555] [2024-11-28 02:39:42,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:39:42,844 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 02:39:42,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:39:42,844 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 02:39:42,844 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 02:39:42,844 INFO L87 Difference]: Start difference. First operand 108 states and 135 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:42,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:39:42,857 INFO L93 Difference]: Finished difference Result 103 states and 125 transitions. [2024-11-28 02:39:42,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 02:39:42,858 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2024-11-28 02:39:42,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:39:42,859 INFO L225 Difference]: With dead ends: 103 [2024-11-28 02:39:42,859 INFO L226 Difference]: Without dead ends: 103 [2024-11-28 02:39:42,859 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 02:39:42,860 INFO L435 NwaCegarLoop]: 47 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 02:39:42,860 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 87 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 02:39:42,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2024-11-28 02:39:42,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 101. [2024-11-28 02:39:42,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 95 states have (on average 1.2947368421052632) internal successors, (123), 100 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:42,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 123 transitions. [2024-11-28 02:39:42,866 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 123 transitions. Word has length 23 [2024-11-28 02:39:42,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:39:42,866 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 123 transitions. [2024-11-28 02:39:42,866 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:42,867 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 123 transitions. [2024-11-28 02:39:42,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-28 02:39:42,867 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:39:42,867 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] [2024-11-28 02:39:42,867 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-11-28 02:39:42,867 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:39:42,868 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:39:42,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1747045371, now seen corresponding path program 1 times [2024-11-28 02:39:42,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:39:42,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291904980] [2024-11-28 02:39:42,868 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:39:42,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:39:42,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:39:42,938 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 02:39:42,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:39:42,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291904980] [2024-11-28 02:39:42,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291904980] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:39:42,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:39:42,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 02:39:42,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041589729] [2024-11-28 02:39:42,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:39:42,940 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 02:39:42,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:39:42,940 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 02:39:42,940 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 02:39:42,941 INFO L87 Difference]: Start difference. First operand 101 states and 123 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:42,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:39:42,988 INFO L93 Difference]: Finished difference Result 110 states and 132 transitions. [2024-11-28 02:39:42,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 02:39:42,989 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2024-11-28 02:39:42,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:39:42,989 INFO L225 Difference]: With dead ends: 110 [2024-11-28 02:39:42,989 INFO L226 Difference]: Without dead ends: 110 [2024-11-28 02:39:42,989 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-28 02:39:42,990 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 24 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 02:39:42,990 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 135 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 02:39:42,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2024-11-28 02:39:42,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 101. [2024-11-28 02:39:42,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 95 states have (on average 1.2736842105263158) internal successors, (121), 100 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:42,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 121 transitions. [2024-11-28 02:39:42,993 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 121 transitions. Word has length 23 [2024-11-28 02:39:42,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:39:42,993 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 121 transitions. [2024-11-28 02:39:42,994 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:42,994 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 121 transitions. [2024-11-28 02:39:42,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-28 02:39:42,994 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:39:42,994 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:39:42,994 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-11-28 02:39:42,995 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:39:42,995 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:39:42,995 INFO L85 PathProgramCache]: Analyzing trace with hash -907642204, now seen corresponding path program 1 times [2024-11-28 02:39:42,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:39:42,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153501456] [2024-11-28 02:39:42,995 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:39:42,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:39:43,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:39:43,322 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:39:43,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:39:43,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153501456] [2024-11-28 02:39:43,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153501456] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:39:43,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267911858] [2024-11-28 02:39:43,323 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:39:43,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:39:43,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:39:43,325 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:39:43,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 02:39:43,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:39:43,402 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-28 02:39:43,404 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:39:43,423 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 13 treesize of output 7 [2024-11-28 02:39:43,435 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 1 [2024-11-28 02:39:43,877 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 02:39:43,877 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:39:44,506 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:39:44,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267911858] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:39:44,506 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:39:44,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 24 [2024-11-28 02:39:44,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270890789] [2024-11-28 02:39:44,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:39:44,507 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-28 02:39:44,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:39:44,508 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-28 02:39:44,508 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2024-11-28 02:39:44,508 INFO L87 Difference]: Start difference. First operand 101 states and 121 transitions. Second operand has 25 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:45,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:39:45,162 INFO L93 Difference]: Finished difference Result 166 states and 203 transitions. [2024-11-28 02:39:45,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-28 02:39:45,162 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2024-11-28 02:39:45,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:39:45,163 INFO L225 Difference]: With dead ends: 166 [2024-11-28 02:39:45,163 INFO L226 Difference]: Without dead ends: 166 [2024-11-28 02:39:45,164 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=319, Invalid=803, Unknown=0, NotChecked=0, Total=1122 [2024-11-28 02:39:45,165 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 66 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 02:39:45,165 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 209 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 02:39:45,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2024-11-28 02:39:45,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 117. [2024-11-28 02:39:45,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 111 states have (on average 1.2792792792792793) internal successors, (142), 116 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:45,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 142 transitions. [2024-11-28 02:39:45,172 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 142 transitions. Word has length 23 [2024-11-28 02:39:45,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:39:45,172 INFO L471 AbstractCegarLoop]: Abstraction has 117 states and 142 transitions. [2024-11-28 02:39:45,174 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:45,174 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 142 transitions. [2024-11-28 02:39:45,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-28 02:39:45,175 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:39:45,175 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:39:45,185 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-28 02:39:45,378 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-28 02:39:45,379 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:39:45,380 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:39:45,380 INFO L85 PathProgramCache]: Analyzing trace with hash 104289427, now seen corresponding path program 2 times [2024-11-28 02:39:45,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:39:45,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618487139] [2024-11-28 02:39:45,380 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:39:45,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:39:45,407 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:39:45,407 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:39:45,833 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:39:45,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:39:45,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618487139] [2024-11-28 02:39:45,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618487139] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:39:45,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686822559] [2024-11-28 02:39:45,833 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:39:45,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:39:45,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:39:45,836 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:39:45,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 02:39:45,950 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:39:45,950 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:39:45,952 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-28 02:39:45,954 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:39:46,061 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 02:39:46,162 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:39:46,163 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:39:46,186 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 18 treesize of output 16 [2024-11-28 02:39:46,189 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2024-11-28 02:39:46,280 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:39:46,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686822559] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:39:46,281 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:39:46,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 20 [2024-11-28 02:39:46,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595351857] [2024-11-28 02:39:46,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:39:46,281 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-28 02:39:46,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:39:46,282 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-28 02:39:46,282 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2024-11-28 02:39:46,283 INFO L87 Difference]: Start difference. First operand 117 states and 142 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:47,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:39:47,380 INFO L93 Difference]: Finished difference Result 337 states and 402 transitions. [2024-11-28 02:39:47,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-28 02:39:47,381 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2024-11-28 02:39:47,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:39:47,382 INFO L225 Difference]: With dead ends: 337 [2024-11-28 02:39:47,382 INFO L226 Difference]: Without dead ends: 337 [2024-11-28 02:39:47,382 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2024-11-28 02:39:47,383 INFO L435 NwaCegarLoop]: 80 mSDtfsCounter, 188 mSDsluCounter, 1018 mSDsCounter, 0 mSdLazyCounter, 783 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 1098 SdHoareTripleChecker+Invalid, 795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-28 02:39:47,383 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 1098 Invalid, 795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 783 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-28 02:39:47,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2024-11-28 02:39:47,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 228. [2024-11-28 02:39:47,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 222 states have (on average 1.2567567567567568) internal successors, (279), 227 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:47,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 279 transitions. [2024-11-28 02:39:47,400 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 279 transitions. Word has length 24 [2024-11-28 02:39:47,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:39:47,401 INFO L471 AbstractCegarLoop]: Abstraction has 228 states and 279 transitions. [2024-11-28 02:39:47,401 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:47,401 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 279 transitions. [2024-11-28 02:39:47,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-28 02:39:47,401 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:39:47,401 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:39:47,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-28 02:39:47,602 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-28 02:39:47,602 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:39:47,602 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:39:47,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1422233632, now seen corresponding path program 1 times [2024-11-28 02:39:47,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:39:47,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069180140] [2024-11-28 02:39:47,603 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:39:47,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:39:47,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:39:47,718 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 02:39:47,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:39:47,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069180140] [2024-11-28 02:39:47,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069180140] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:39:47,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907168619] [2024-11-28 02:39:47,720 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:39:47,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:39:47,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:39:47,723 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:39:47,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 02:39:47,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:39:47,817 INFO L256 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-28 02:39:47,818 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:39:47,849 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 02:39:47,849 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:39:47,883 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 02:39:47,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907168619] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:39:47,883 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:39:47,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2024-11-28 02:39:47,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035156914] [2024-11-28 02:39:47,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:39:47,884 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 02:39:47,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:39:47,885 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 02:39:47,885 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-28 02:39:47,885 INFO L87 Difference]: Start difference. First operand 228 states and 279 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:47,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:39:47,946 INFO L93 Difference]: Finished difference Result 276 states and 330 transitions. [2024-11-28 02:39:47,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 02:39:47,947 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2024-11-28 02:39:47,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:39:47,948 INFO L225 Difference]: With dead ends: 276 [2024-11-28 02:39:47,948 INFO L226 Difference]: Without dead ends: 276 [2024-11-28 02:39:47,948 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 50 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 02:39:47,949 INFO L435 NwaCegarLoop]: 47 mSDtfsCounter, 28 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:39:47,949 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 217 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:39:47,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2024-11-28 02:39:47,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 251. [2024-11-28 02:39:47,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 245 states have (on average 1.2408163265306122) internal successors, (304), 250 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:47,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 304 transitions. [2024-11-28 02:39:47,964 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 304 transitions. Word has length 25 [2024-11-28 02:39:47,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:39:47,964 INFO L471 AbstractCegarLoop]: Abstraction has 251 states and 304 transitions. [2024-11-28 02:39:47,964 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:47,964 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 304 transitions. [2024-11-28 02:39:47,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-28 02:39:47,965 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:39:47,965 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:39:47,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-28 02:39:48,168 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-28 02:39:48,169 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:39:48,169 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:39:48,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1844935458, now seen corresponding path program 1 times [2024-11-28 02:39:48,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:39:48,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135658987] [2024-11-28 02:39:48,169 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:39:48,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:39:48,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:39:48,352 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:39:48,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:39:48,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135658987] [2024-11-28 02:39:48,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135658987] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:39:48,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:39:48,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-28 02:39:48,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290857686] [2024-11-28 02:39:48,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:39:48,353 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-28 02:39:48,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:39:48,354 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-28 02:39:48,354 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-11-28 02:39:48,354 INFO L87 Difference]: Start difference. First operand 251 states and 304 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:48,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:39:48,416 INFO L93 Difference]: Finished difference Result 333 states and 394 transitions. [2024-11-28 02:39:48,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 02:39:48,416 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2024-11-28 02:39:48,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:39:48,417 INFO L225 Difference]: With dead ends: 333 [2024-11-28 02:39:48,417 INFO L226 Difference]: Without dead ends: 333 [2024-11-28 02:39:48,417 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-11-28 02:39:48,418 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 12 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:39:48,418 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 256 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:39:48,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2024-11-28 02:39:48,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 287. [2024-11-28 02:39:48,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 281 states have (on average 1.2277580071174377) internal successors, (345), 286 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:48,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 345 transitions. [2024-11-28 02:39:48,426 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 345 transitions. Word has length 25 [2024-11-28 02:39:48,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:39:48,426 INFO L471 AbstractCegarLoop]: Abstraction has 287 states and 345 transitions. [2024-11-28 02:39:48,426 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:48,426 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 345 transitions. [2024-11-28 02:39:48,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-28 02:39:48,427 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:39:48,427 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:39:48,427 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-11-28 02:39:48,427 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:39:48,427 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:39:48,427 INFO L85 PathProgramCache]: Analyzing trace with hash 2063790176, now seen corresponding path program 1 times [2024-11-28 02:39:48,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:39:48,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021868120] [2024-11-28 02:39:48,427 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:39:48,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:39:48,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:39:48,663 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:39:48,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:39:48,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021868120] [2024-11-28 02:39:48,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021868120] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:39:48,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:39:48,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-28 02:39:48,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010637201] [2024-11-28 02:39:48,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:39:48,664 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 02:39:48,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:39:48,664 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 02:39:48,664 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-11-28 02:39:48,665 INFO L87 Difference]: Start difference. First operand 287 states and 345 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:48,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:39:48,778 INFO L93 Difference]: Finished difference Result 309 states and 367 transitions. [2024-11-28 02:39:48,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 02:39:48,778 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2024-11-28 02:39:48,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:39:48,779 INFO L225 Difference]: With dead ends: 309 [2024-11-28 02:39:48,779 INFO L226 Difference]: Without dead ends: 309 [2024-11-28 02:39:48,780 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-11-28 02:39:48,780 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 19 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:39:48,780 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 235 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:39:48,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2024-11-28 02:39:48,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 273. [2024-11-28 02:39:48,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 267 states have (on average 1.2397003745318351) internal successors, (331), 272 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:48,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 331 transitions. [2024-11-28 02:39:48,790 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 331 transitions. Word has length 25 [2024-11-28 02:39:48,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:39:48,790 INFO L471 AbstractCegarLoop]: Abstraction has 273 states and 331 transitions. [2024-11-28 02:39:48,790 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:48,790 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 331 transitions. [2024-11-28 02:39:48,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-28 02:39:48,792 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:39:48,792 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] [2024-11-28 02:39:48,793 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-11-28 02:39:48,794 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:39:48,794 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:39:48,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1201567744, now seen corresponding path program 1 times [2024-11-28 02:39:48,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:39:48,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940837538] [2024-11-28 02:39:48,794 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:39:48,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:39:48,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:39:48,930 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 02:39:48,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:39:48,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940837538] [2024-11-28 02:39:48,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940837538] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:39:48,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:39:48,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 02:39:48,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255515607] [2024-11-28 02:39:48,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:39:48,931 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 02:39:48,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:39:48,932 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 02:39:48,932 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 02:39:48,933 INFO L87 Difference]: Start difference. First operand 273 states and 331 transitions. Second operand has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:48,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:39:48,959 INFO L93 Difference]: Finished difference Result 272 states and 330 transitions. [2024-11-28 02:39:48,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 02:39:48,960 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2024-11-28 02:39:48,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:39:48,960 INFO L225 Difference]: With dead ends: 272 [2024-11-28 02:39:48,961 INFO L226 Difference]: Without dead ends: 220 [2024-11-28 02:39:48,961 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 02:39:48,962 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 22 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 02:39:48,962 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 70 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 02:39:48,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2024-11-28 02:39:48,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 220. [2024-11-28 02:39:48,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 215 states have (on average 1.1953488372093024) internal successors, (257), 219 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:48,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 257 transitions. [2024-11-28 02:39:48,970 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 257 transitions. Word has length 26 [2024-11-28 02:39:48,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:39:48,970 INFO L471 AbstractCegarLoop]: Abstraction has 220 states and 257 transitions. [2024-11-28 02:39:48,971 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:48,971 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 257 transitions. [2024-11-28 02:39:48,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-28 02:39:48,974 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:39:48,974 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:39:48,974 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-11-28 02:39:48,975 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:39:48,975 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:39:48,975 INFO L85 PathProgramCache]: Analyzing trace with hash 413633501, now seen corresponding path program 2 times [2024-11-28 02:39:48,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:39:48,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918756770] [2024-11-28 02:39:48,975 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:39:48,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:39:48,985 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 02:39:48,985 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:39:49,103 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-28 02:39:49,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:39:49,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918756770] [2024-11-28 02:39:49,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918756770] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:39:49,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:39:49,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 02:39:49,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188404772] [2024-11-28 02:39:49,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:39:49,105 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 02:39:49,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:39:49,105 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 02:39:49,105 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-11-28 02:39:49,105 INFO L87 Difference]: Start difference. First operand 220 states and 257 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:49,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:39:49,208 INFO L93 Difference]: Finished difference Result 240 states and 280 transitions. [2024-11-28 02:39:49,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 02:39:49,209 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2024-11-28 02:39:49,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:39:49,210 INFO L225 Difference]: With dead ends: 240 [2024-11-28 02:39:49,210 INFO L226 Difference]: Without dead ends: 240 [2024-11-28 02:39:49,210 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-11-28 02:39:49,210 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 38 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:39:49,211 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 96 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:39:49,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2024-11-28 02:39:49,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 212. [2024-11-28 02:39:49,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 207 states have (on average 1.183574879227053) internal successors, (245), 211 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:49,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 245 transitions. [2024-11-28 02:39:49,218 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 245 transitions. Word has length 27 [2024-11-28 02:39:49,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:39:49,218 INFO L471 AbstractCegarLoop]: Abstraction has 212 states and 245 transitions. [2024-11-28 02:39:49,218 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:49,218 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 245 transitions. [2024-11-28 02:39:49,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-28 02:39:49,219 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:39:49,219 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] [2024-11-28 02:39:49,219 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-11-28 02:39:49,219 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:39:49,219 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:39:49,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1925498488, now seen corresponding path program 1 times [2024-11-28 02:39:49,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:39:49,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733937896] [2024-11-28 02:39:49,219 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:39:49,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:39:49,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:39:49,436 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:39:49,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:39:49,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733937896] [2024-11-28 02:39:49,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733937896] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:39:49,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227642384] [2024-11-28 02:39:49,437 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:39:49,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:39:49,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:39:49,439 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:39:49,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-28 02:39:49,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:39:49,534 INFO L256 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-28 02:39:49,537 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:39:49,674 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:39:49,674 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:39:49,834 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 7 treesize of output 5 [2024-11-28 02:39:49,894 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:39:49,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227642384] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:39:49,894 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:39:49,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2024-11-28 02:39:49,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610509346] [2024-11-28 02:39:49,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:39:49,895 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-28 02:39:49,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:39:49,896 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-28 02:39:49,896 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2024-11-28 02:39:49,897 INFO L87 Difference]: Start difference. First operand 212 states and 245 transitions. Second operand has 20 states, 19 states have (on average 3.0) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:50,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:39:50,227 INFO L93 Difference]: Finished difference Result 268 states and 304 transitions. [2024-11-28 02:39:50,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 02:39:50,228 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.0) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2024-11-28 02:39:50,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:39:50,229 INFO L225 Difference]: With dead ends: 268 [2024-11-28 02:39:50,230 INFO L226 Difference]: Without dead ends: 266 [2024-11-28 02:39:50,230 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2024-11-28 02:39:50,230 INFO L435 NwaCegarLoop]: 61 mSDtfsCounter, 58 mSDsluCounter, 511 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 02:39:50,231 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 572 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 02:39:50,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2024-11-28 02:39:50,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 209. [2024-11-28 02:39:50,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 204 states have (on average 1.1911764705882353) internal successors, (243), 208 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:50,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 243 transitions. [2024-11-28 02:39:50,237 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 243 transitions. Word has length 28 [2024-11-28 02:39:50,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:39:50,237 INFO L471 AbstractCegarLoop]: Abstraction has 209 states and 243 transitions. [2024-11-28 02:39:50,237 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.0) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:50,237 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 243 transitions. [2024-11-28 02:39:50,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-28 02:39:50,238 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:39:50,238 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:39:50,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-28 02:39:50,442 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2024-11-28 02:39:50,443 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:39:50,443 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:39:50,443 INFO L85 PathProgramCache]: Analyzing trace with hash 2107179289, now seen corresponding path program 1 times [2024-11-28 02:39:50,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:39:50,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075293899] [2024-11-28 02:39:50,443 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:39:50,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:39:50,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:39:50,701 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:39:50,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:39:50,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075293899] [2024-11-28 02:39:50,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075293899] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:39:50,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:39:50,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-28 02:39:50,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051134176] [2024-11-28 02:39:50,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:39:50,702 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-28 02:39:50,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:39:50,702 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-28 02:39:50,702 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-11-28 02:39:50,702 INFO L87 Difference]: Start difference. First operand 209 states and 243 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:50,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:39:50,800 INFO L93 Difference]: Finished difference Result 291 states and 332 transitions. [2024-11-28 02:39:50,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 02:39:50,801 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2024-11-28 02:39:50,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:39:50,802 INFO L225 Difference]: With dead ends: 291 [2024-11-28 02:39:50,802 INFO L226 Difference]: Without dead ends: 258 [2024-11-28 02:39:50,802 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-11-28 02:39:50,803 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 24 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:39:50,803 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 202 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:39:50,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2024-11-28 02:39:50,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 214. [2024-11-28 02:39:50,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 209 states have (on average 1.2057416267942584) internal successors, (252), 213 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:50,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 252 transitions. [2024-11-28 02:39:50,816 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 252 transitions. Word has length 29 [2024-11-28 02:39:50,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:39:50,816 INFO L471 AbstractCegarLoop]: Abstraction has 214 states and 252 transitions. [2024-11-28 02:39:50,816 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:50,817 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 252 transitions. [2024-11-28 02:39:50,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-28 02:39:50,817 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:39:50,817 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:39:50,818 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-11-28 02:39:50,818 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:39:50,818 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:39:50,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1314006894, now seen corresponding path program 3 times [2024-11-28 02:39:50,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:39:50,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347643326] [2024-11-28 02:39:50,819 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:39:50,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:39:50,848 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-28 02:39:50,848 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:39:51,369 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:39:51,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:39:51,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347643326] [2024-11-28 02:39:51,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347643326] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:39:51,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467626350] [2024-11-28 02:39:51,370 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:39:51,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:39:51,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:39:51,372 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:39:51,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-28 02:39:51,478 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-28 02:39:51,478 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:39:51,483 INFO L256 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-28 02:39:51,485 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:39:51,611 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 02:39:51,750 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:39:51,750 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:39:51,777 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 18 treesize of output 16 [2024-11-28 02:39:51,779 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 20 treesize of output 16 [2024-11-28 02:39:51,880 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:39:51,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467626350] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:39:51,880 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:39:51,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 24 [2024-11-28 02:39:51,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935645485] [2024-11-28 02:39:51,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:39:51,881 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-28 02:39:51,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:39:51,881 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-28 02:39:51,882 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2024-11-28 02:39:51,882 INFO L87 Difference]: Start difference. First operand 214 states and 252 transitions. Second operand has 24 states, 24 states have (on average 2.625) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:53,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:39:53,206 INFO L93 Difference]: Finished difference Result 362 states and 403 transitions. [2024-11-28 02:39:53,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-28 02:39:53,207 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2024-11-28 02:39:53,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:39:53,208 INFO L225 Difference]: With dead ends: 362 [2024-11-28 02:39:53,208 INFO L226 Difference]: Without dead ends: 301 [2024-11-28 02:39:53,209 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=186, Invalid=1536, Unknown=0, NotChecked=0, Total=1722 [2024-11-28 02:39:53,209 INFO L435 NwaCegarLoop]: 56 mSDtfsCounter, 167 mSDsluCounter, 824 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 880 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-28 02:39:53,210 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 880 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-28 02:39:53,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2024-11-28 02:39:53,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 245. [2024-11-28 02:39:53,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 240 states have (on average 1.1708333333333334) internal successors, (281), 244 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:53,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 281 transitions. [2024-11-28 02:39:53,217 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 281 transitions. Word has length 31 [2024-11-28 02:39:53,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:39:53,217 INFO L471 AbstractCegarLoop]: Abstraction has 245 states and 281 transitions. [2024-11-28 02:39:53,217 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:53,217 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 281 transitions. [2024-11-28 02:39:53,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-28 02:39:53,218 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:39:53,218 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:39:53,228 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-28 02:39:53,419 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-11-28 02:39:53,419 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:39:53,419 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:39:53,420 INFO L85 PathProgramCache]: Analyzing trace with hash -30091050, now seen corresponding path program 2 times [2024-11-28 02:39:53,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:39:53,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940165972] [2024-11-28 02:39:53,420 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:39:53,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:39:53,434 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:39:53,434 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:39:53,662 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 02:39:53,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:39:53,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940165972] [2024-11-28 02:39:53,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940165972] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:39:53,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2240651] [2024-11-28 02:39:53,663 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:39:53,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:39:53,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:39:53,665 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:39:53,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-28 02:39:53,759 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:39:53,760 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:39:53,761 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-28 02:39:53,763 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:39:53,773 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 13 treesize of output 7 [2024-11-28 02:39:53,782 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 1 [2024-11-28 02:39:54,358 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:39:54,358 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:39:55,181 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:39:55,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2240651] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:39:55,181 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:39:55,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 11] total 27 [2024-11-28 02:39:55,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358115198] [2024-11-28 02:39:55,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:39:55,182 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-28 02:39:55,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:39:55,183 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-28 02:39:55,184 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=555, Unknown=0, NotChecked=0, Total=756 [2024-11-28 02:39:55,184 INFO L87 Difference]: Start difference. First operand 245 states and 281 transitions. Second operand has 28 states, 27 states have (on average 2.925925925925926) internal successors, (79), 28 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:55,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:39:55,854 INFO L93 Difference]: Finished difference Result 328 states and 381 transitions. [2024-11-28 02:39:55,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-28 02:39:55,855 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.925925925925926) internal successors, (79), 28 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2024-11-28 02:39:55,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:39:55,857 INFO L225 Difference]: With dead ends: 328 [2024-11-28 02:39:55,857 INFO L226 Difference]: Without dead ends: 328 [2024-11-28 02:39:55,857 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=434, Invalid=1206, Unknown=0, NotChecked=0, Total=1640 [2024-11-28 02:39:55,858 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 44 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 02:39:55,859 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 191 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 02:39:55,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2024-11-28 02:39:55,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 204. [2024-11-28 02:39:55,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 200 states have (on average 1.145) internal successors, (229), 203 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:55,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 229 transitions. [2024-11-28 02:39:55,866 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 229 transitions. Word has length 31 [2024-11-28 02:39:55,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:39:55,867 INFO L471 AbstractCegarLoop]: Abstraction has 204 states and 229 transitions. [2024-11-28 02:39:55,867 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.925925925925926) internal successors, (79), 28 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:55,867 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 229 transitions. [2024-11-28 02:39:55,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-28 02:39:55,867 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:39:55,868 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:39:55,878 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-28 02:39:56,071 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:39:56,072 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:39:56,072 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:39:56,072 INFO L85 PathProgramCache]: Analyzing trace with hash -419846126, now seen corresponding path program 1 times [2024-11-28 02:39:56,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:39:56,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232268662] [2024-11-28 02:39:56,072 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:39:56,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:39:56,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:39:56,386 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:39:56,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:39:56,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232268662] [2024-11-28 02:39:56,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232268662] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:39:56,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826775856] [2024-11-28 02:39:56,387 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:39:56,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:39:56,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:39:56,389 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:39:56,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-28 02:39:56,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:39:56,493 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-28 02:39:56,498 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:39:56,622 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:39:56,623 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:39:56,785 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 02:39:56,817 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:39:56,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826775856] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:39:56,817 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:39:56,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2024-11-28 02:39:56,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10871846] [2024-11-28 02:39:56,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:39:56,818 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-28 02:39:56,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:39:56,818 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-28 02:39:56,819 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2024-11-28 02:39:56,819 INFO L87 Difference]: Start difference. First operand 204 states and 229 transitions. Second operand has 21 states, 20 states have (on average 3.4) internal successors, (68), 21 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:57,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:39:57,062 INFO L93 Difference]: Finished difference Result 234 states and 257 transitions. [2024-11-28 02:39:57,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 02:39:57,063 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.4) internal successors, (68), 21 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2024-11-28 02:39:57,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:39:57,064 INFO L225 Difference]: With dead ends: 234 [2024-11-28 02:39:57,064 INFO L226 Difference]: Without dead ends: 234 [2024-11-28 02:39:57,064 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2024-11-28 02:39:57,064 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 23 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 02:39:57,065 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 299 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 02:39:57,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2024-11-28 02:39:57,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 218. [2024-11-28 02:39:57,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 214 states have (on average 1.1355140186915889) internal successors, (243), 217 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:57,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 243 transitions. [2024-11-28 02:39:57,070 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 243 transitions. Word has length 33 [2024-11-28 02:39:57,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:39:57,070 INFO L471 AbstractCegarLoop]: Abstraction has 218 states and 243 transitions. [2024-11-28 02:39:57,070 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.4) internal successors, (68), 21 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:57,070 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 243 transitions. [2024-11-28 02:39:57,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-28 02:39:57,071 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:39:57,071 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:39:57,081 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-28 02:39:57,271 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:39:57,271 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:39:57,272 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:39:57,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1784723945, now seen corresponding path program 2 times [2024-11-28 02:39:57,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:39:57,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324122941] [2024-11-28 02:39:57,272 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:39:57,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:39:57,288 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:39:57,288 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:39:57,670 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:39:57,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:39:57,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324122941] [2024-11-28 02:39:57,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324122941] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:39:57,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644456432] [2024-11-28 02:39:57,670 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:39:57,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:39:57,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:39:57,673 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:39:57,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-28 02:39:57,782 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:39:57,782 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:39:57,783 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-11-28 02:39:57,786 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:39:57,995 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:39:57,995 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:39:58,166 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 23 treesize of output 19 [2024-11-28 02:39:58,335 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:39:58,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644456432] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:39:58,335 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:39:58,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2024-11-28 02:39:58,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499837836] [2024-11-28 02:39:58,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:39:58,336 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-28 02:39:58,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:39:58,336 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-28 02:39:58,338 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2024-11-28 02:39:58,338 INFO L87 Difference]: Start difference. First operand 218 states and 243 transitions. Second operand has 26 states, 25 states have (on average 3.52) internal successors, (88), 26 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:58,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:39:58,833 INFO L93 Difference]: Finished difference Result 303 states and 332 transitions. [2024-11-28 02:39:58,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-28 02:39:58,834 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 3.52) internal successors, (88), 26 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2024-11-28 02:39:58,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:39:58,835 INFO L225 Difference]: With dead ends: 303 [2024-11-28 02:39:58,835 INFO L226 Difference]: Without dead ends: 301 [2024-11-28 02:39:58,835 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2024-11-28 02:39:58,836 INFO L435 NwaCegarLoop]: 66 mSDtfsCounter, 77 mSDsluCounter, 755 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 821 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 02:39:58,836 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 821 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 702 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 02:39:58,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2024-11-28 02:39:58,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 218. [2024-11-28 02:39:58,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 214 states have (on average 1.1401869158878504) internal successors, (244), 217 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:58,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 244 transitions. [2024-11-28 02:39:58,843 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 244 transitions. Word has length 35 [2024-11-28 02:39:58,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:39:58,843 INFO L471 AbstractCegarLoop]: Abstraction has 218 states and 244 transitions. [2024-11-28 02:39:58,843 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 3.52) internal successors, (88), 26 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:39:58,843 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 244 transitions. [2024-11-28 02:39:58,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-28 02:39:58,844 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:39:58,844 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:39:58,853 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-28 02:39:59,047 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-11-28 02:39:59,048 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:39:59,048 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:39:59,048 INFO L85 PathProgramCache]: Analyzing trace with hash 279165840, now seen corresponding path program 1 times [2024-11-28 02:39:59,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:39:59,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023232363] [2024-11-28 02:39:59,048 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:39:59,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:39:59,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:39:59,467 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 02:39:59,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:39:59,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023232363] [2024-11-28 02:39:59,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023232363] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:39:59,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267328654] [2024-11-28 02:39:59,468 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:39:59,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:39:59,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:39:59,469 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:39:59,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-28 02:39:59,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:39:59,573 INFO L256 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-11-28 02:39:59,576 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:39:59,610 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 13 treesize of output 1 [2024-11-28 02:39:59,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:39:59,618 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2024-11-28 02:40:00,146 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 02:40:00,146 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:40:00,728 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 02:40:00,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267328654] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:40:00,729 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:40:00,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 11] total 31 [2024-11-28 02:40:00,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134002325] [2024-11-28 02:40:00,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:40:00,729 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-28 02:40:00,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:40:00,730 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-28 02:40:00,730 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=862, Unknown=0, NotChecked=0, Total=992 [2024-11-28 02:40:00,731 INFO L87 Difference]: Start difference. First operand 218 states and 244 transitions. Second operand has 32 states, 31 states have (on average 3.4193548387096775) internal successors, (106), 32 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:40:01,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:40:01,712 INFO L93 Difference]: Finished difference Result 322 states and 351 transitions. [2024-11-28 02:40:01,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-28 02:40:01,712 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 3.4193548387096775) internal successors, (106), 32 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2024-11-28 02:40:01,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:40:01,714 INFO L225 Difference]: With dead ends: 322 [2024-11-28 02:40:01,714 INFO L226 Difference]: Without dead ends: 314 [2024-11-28 02:40:01,714 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=336, Invalid=2114, Unknown=0, NotChecked=0, Total=2450 [2024-11-28 02:40:01,715 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 215 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 02:40:01,715 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 397 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 02:40:01,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2024-11-28 02:40:01,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 246. [2024-11-28 02:40:01,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 242 states have (on average 1.1363636363636365) internal successors, (275), 245 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:40:01,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 275 transitions. [2024-11-28 02:40:01,722 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 275 transitions. Word has length 37 [2024-11-28 02:40:01,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:40:01,722 INFO L471 AbstractCegarLoop]: Abstraction has 246 states and 275 transitions. [2024-11-28 02:40:01,722 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 3.4193548387096775) internal successors, (106), 32 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:40:01,723 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 275 transitions. [2024-11-28 02:40:01,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-28 02:40:01,723 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:40:01,723 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:40:01,734 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-28 02:40:01,924 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-11-28 02:40:01,924 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:40:01,924 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:40:01,924 INFO L85 PathProgramCache]: Analyzing trace with hash -740078687, now seen corresponding path program 4 times [2024-11-28 02:40:01,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:40:01,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642109821] [2024-11-28 02:40:01,925 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:40:01,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:40:01,960 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:40:01,961 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:40:02,414 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:40:02,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:40:02,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642109821] [2024-11-28 02:40:02,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642109821] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:40:02,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419554056] [2024-11-28 02:40:02,415 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:40:02,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:40:02,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:40:02,417 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:40:02,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-28 02:40:02,546 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:40:02,547 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:40:02,549 INFO L256 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-11-28 02:40:02,551 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:40:02,708 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 02:40:02,781 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:40:02,781 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:40:02,809 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 18 treesize of output 16 [2024-11-28 02:40:02,814 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2024-11-28 02:40:02,893 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:40:02,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419554056] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:40:02,893 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:40:02,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 25 [2024-11-28 02:40:02,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845898090] [2024-11-28 02:40:02,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:40:02,893 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-28 02:40:02,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:40:02,894 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-28 02:40:02,894 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2024-11-28 02:40:02,894 INFO L87 Difference]: Start difference. First operand 246 states and 275 transitions. Second operand has 25 states, 25 states have (on average 2.64) internal successors, (66), 25 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:40:03,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:40:03,369 INFO L93 Difference]: Finished difference Result 381 states and 419 transitions. [2024-11-28 02:40:03,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-28 02:40:03,369 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.64) internal successors, (66), 25 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2024-11-28 02:40:03,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:40:03,372 INFO L225 Difference]: With dead ends: 381 [2024-11-28 02:40:03,372 INFO L226 Difference]: Without dead ends: 364 [2024-11-28 02:40:03,372 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=95, Invalid=717, Unknown=0, NotChecked=0, Total=812 [2024-11-28 02:40:03,372 INFO L435 NwaCegarLoop]: 72 mSDtfsCounter, 56 mSDsluCounter, 1173 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 1245 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 02:40:03,373 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 1245 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 688 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 02:40:03,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2024-11-28 02:40:03,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 292. [2024-11-28 02:40:03,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 288 states have (on average 1.1319444444444444) internal successors, (326), 291 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:40:03,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 326 transitions. [2024-11-28 02:40:03,381 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 326 transitions. Word has length 38 [2024-11-28 02:40:03,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:40:03,381 INFO L471 AbstractCegarLoop]: Abstraction has 292 states and 326 transitions. [2024-11-28 02:40:03,381 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.64) internal successors, (66), 25 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:40:03,381 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 326 transitions. [2024-11-28 02:40:03,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-28 02:40:03,382 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:40:03,382 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:40:03,392 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-28 02:40:03,582 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:40:03,583 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:40:03,583 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:40:03,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1515808387, now seen corresponding path program 2 times [2024-11-28 02:40:03,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:40:03,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146619301] [2024-11-28 02:40:03,583 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:40:03,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:40:03,611 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:40:03,615 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:40:04,137 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:40:04,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:40:04,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146619301] [2024-11-28 02:40:04,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146619301] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:40:04,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978605001] [2024-11-28 02:40:04,137 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:40:04,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:40:04,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:40:04,139 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:40:04,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-28 02:40:04,258 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:40:04,258 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:40:04,259 INFO L256 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-28 02:40:04,261 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:40:04,271 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-28 02:40:04,311 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 14 treesize of output 10 [2024-11-28 02:40:04,765 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 02:40:04,766 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 20 treesize of output 17 [2024-11-28 02:40:04,948 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:40:04,948 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:40:05,534 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 13 [2024-11-28 02:40:05,541 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 24 treesize of output 20 [2024-11-28 02:40:05,652 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:40:05,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978605001] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:40:05,652 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:40:05,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 37 [2024-11-28 02:40:05,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271127672] [2024-11-28 02:40:05,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:40:05,653 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-28 02:40:05,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:40:05,654 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-28 02:40:05,654 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1219, Unknown=0, NotChecked=0, Total=1332 [2024-11-28 02:40:05,654 INFO L87 Difference]: Start difference. First operand 292 states and 326 transitions. Second operand has 37 states, 37 states have (on average 2.864864864864865) internal successors, (106), 37 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:40:06,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:40:06,861 INFO L93 Difference]: Finished difference Result 318 states and 345 transitions. [2024-11-28 02:40:06,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-28 02:40:06,862 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.864864864864865) internal successors, (106), 37 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2024-11-28 02:40:06,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:40:06,863 INFO L225 Difference]: With dead ends: 318 [2024-11-28 02:40:06,863 INFO L226 Difference]: Without dead ends: 277 [2024-11-28 02:40:06,863 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=261, Invalid=2495, Unknown=0, NotChecked=0, Total=2756 [2024-11-28 02:40:06,864 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 61 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 902 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 902 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-28 02:40:06,864 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 560 Invalid, 915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 902 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-28 02:40:06,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2024-11-28 02:40:06,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 269. [2024-11-28 02:40:06,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 265 states have (on average 1.1283018867924528) internal successors, (299), 268 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:40:06,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 299 transitions. [2024-11-28 02:40:06,873 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 299 transitions. Word has length 40 [2024-11-28 02:40:06,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:40:06,873 INFO L471 AbstractCegarLoop]: Abstraction has 269 states and 299 transitions. [2024-11-28 02:40:06,873 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.864864864864865) internal successors, (106), 37 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:40:06,873 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 299 transitions. [2024-11-28 02:40:06,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-28 02:40:06,874 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:40:06,874 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:40:06,885 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-28 02:40:07,075 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-11-28 02:40:07,075 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:40:07,076 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:40:07,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1043845000, now seen corresponding path program 5 times [2024-11-28 02:40:07,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:40:07,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498291944] [2024-11-28 02:40:07,076 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 02:40:07,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:40:07,101 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-28 02:40:07,102 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:40:07,433 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 15 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:40:07,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:40:07,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498291944] [2024-11-28 02:40:07,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498291944] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:40:07,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310730044] [2024-11-28 02:40:07,433 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 02:40:07,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:40:07,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:40:07,436 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:40:07,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-28 02:40:07,572 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-28 02:40:07,572 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:40:07,574 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-11-28 02:40:07,577 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:40:07,841 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 15 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:40:07,841 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:40:08,060 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 23 treesize of output 19 [2024-11-28 02:40:08,264 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 15 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:40:08,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310730044] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:40:08,264 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:40:08,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 30 [2024-11-28 02:40:08,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971961322] [2024-11-28 02:40:08,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:40:08,265 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-28 02:40:08,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:40:08,265 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-28 02:40:08,266 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=800, Unknown=0, NotChecked=0, Total=930 [2024-11-28 02:40:08,266 INFO L87 Difference]: Start difference. First operand 269 states and 299 transitions. Second operand has 31 states, 30 states have (on average 3.466666666666667) internal successors, (104), 31 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:40:08,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:40:08,710 INFO L93 Difference]: Finished difference Result 394 states and 430 transitions. [2024-11-28 02:40:08,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-28 02:40:08,711 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 3.466666666666667) internal successors, (104), 31 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2024-11-28 02:40:08,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:40:08,712 INFO L225 Difference]: With dead ends: 394 [2024-11-28 02:40:08,712 INFO L226 Difference]: Without dead ends: 383 [2024-11-28 02:40:08,712 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=147, Invalid=845, Unknown=0, NotChecked=0, Total=992 [2024-11-28 02:40:08,713 INFO L435 NwaCegarLoop]: 74 mSDtfsCounter, 64 mSDsluCounter, 934 mSDsCounter, 0 mSdLazyCounter, 866 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 1008 SdHoareTripleChecker+Invalid, 877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 02:40:08,713 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 1008 Invalid, 877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 866 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 02:40:08,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2024-11-28 02:40:08,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 302. [2024-11-28 02:40:08,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 298 states have (on average 1.1208053691275168) internal successors, (334), 301 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:40:08,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 334 transitions. [2024-11-28 02:40:08,719 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 334 transitions. Word has length 42 [2024-11-28 02:40:08,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:40:08,719 INFO L471 AbstractCegarLoop]: Abstraction has 302 states and 334 transitions. [2024-11-28 02:40:08,720 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 3.466666666666667) internal successors, (104), 31 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:40:08,720 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 334 transitions. [2024-11-28 02:40:08,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-28 02:40:08,721 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:40:08,721 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:40:08,733 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-28 02:40:08,921 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-11-28 02:40:08,921 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:40:08,922 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:40:08,922 INFO L85 PathProgramCache]: Analyzing trace with hash 976844675, now seen corresponding path program 2 times [2024-11-28 02:40:08,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:40:08,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741740053] [2024-11-28 02:40:08,922 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:40:08,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:40:08,938 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:40:08,938 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:40:09,433 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:40:09,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:40:09,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741740053] [2024-11-28 02:40:09,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741740053] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:40:09,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821964578] [2024-11-28 02:40:09,434 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:40:09,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:40:09,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:40:09,436 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:40:09,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-28 02:40:09,567 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:40:09,567 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:40:09,569 INFO L256 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-11-28 02:40:09,572 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:40:09,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:40:09,587 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 13 treesize of output 7 [2024-11-28 02:40:09,591 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 10 treesize of output 8 [2024-11-28 02:40:10,366 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:40:10,366 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:40:11,185 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:40:11,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821964578] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:40:11,185 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:40:11,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2024-11-28 02:40:11,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368266770] [2024-11-28 02:40:11,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:40:11,186 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-28 02:40:11,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:40:11,187 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-28 02:40:11,187 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=871, Unknown=0, NotChecked=0, Total=992 [2024-11-28 02:40:11,187 INFO L87 Difference]: Start difference. First operand 302 states and 334 transitions. Second operand has 32 states, 31 states have (on average 4.064516129032258) internal successors, (126), 32 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:40:12,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:40:12,442 INFO L93 Difference]: Finished difference Result 459 states and 496 transitions. [2024-11-28 02:40:12,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-28 02:40:12,442 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 4.064516129032258) internal successors, (126), 32 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2024-11-28 02:40:12,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:40:12,444 INFO L225 Difference]: With dead ends: 459 [2024-11-28 02:40:12,444 INFO L226 Difference]: Without dead ends: 451 [2024-11-28 02:40:12,444 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=298, Invalid=1864, Unknown=0, NotChecked=0, Total=2162 [2024-11-28 02:40:12,445 INFO L435 NwaCegarLoop]: 46 mSDtfsCounter, 207 mSDsluCounter, 661 mSDsCounter, 0 mSdLazyCounter, 945 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 707 SdHoareTripleChecker+Invalid, 973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-28 02:40:12,445 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 707 Invalid, 973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 945 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-28 02:40:12,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2024-11-28 02:40:12,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 351. [2024-11-28 02:40:12,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 347 states have (on average 1.1123919308357348) internal successors, (386), 350 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:40:12,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 386 transitions. [2024-11-28 02:40:12,464 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 386 transitions. Word has length 44 [2024-11-28 02:40:12,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:40:12,464 INFO L471 AbstractCegarLoop]: Abstraction has 351 states and 386 transitions. [2024-11-28 02:40:12,464 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 4.064516129032258) internal successors, (126), 32 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:40:12,465 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 386 transitions. [2024-11-28 02:40:12,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-28 02:40:12,465 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:40:12,466 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:40:12,476 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-28 02:40:12,669 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:40:12,670 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:40:12,670 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:40:12,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1623188960, now seen corresponding path program 6 times [2024-11-28 02:40:12,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:40:12,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761457345] [2024-11-28 02:40:12,671 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 02:40:12,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:40:12,698 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-11-28 02:40:12,698 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:40:13,391 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:40:13,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:40:13,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761457345] [2024-11-28 02:40:13,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761457345] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:40:13,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763050560] [2024-11-28 02:40:13,392 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 02:40:13,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:40:13,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:40:13,394 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:40:13,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-28 02:40:13,534 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-11-28 02:40:13,534 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:40:13,536 INFO L256 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-11-28 02:40:13,538 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:40:13,693 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 02:40:13,887 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 9 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:40:13,887 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:40:13,917 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 18 treesize of output 16 [2024-11-28 02:40:13,920 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2024-11-28 02:40:14,041 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 9 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:40:14,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763050560] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:40:14,042 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:40:14,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 32 [2024-11-28 02:40:14,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612727916] [2024-11-28 02:40:14,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:40:14,042 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-28 02:40:14,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:40:14,043 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-28 02:40:14,043 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=915, Unknown=0, NotChecked=0, Total=992 [2024-11-28 02:40:14,043 INFO L87 Difference]: Start difference. First operand 351 states and 386 transitions. Second operand has 32 states, 32 states have (on average 2.84375) internal successors, (91), 32 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:40:15,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:40:15,690 INFO L93 Difference]: Finished difference Result 620 states and 667 transitions. [2024-11-28 02:40:15,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-11-28 02:40:15,694 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.84375) internal successors, (91), 32 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2024-11-28 02:40:15,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:40:15,696 INFO L225 Difference]: With dead ends: 620 [2024-11-28 02:40:15,696 INFO L226 Difference]: Without dead ends: 541 [2024-11-28 02:40:15,697 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=256, Invalid=3166, Unknown=0, NotChecked=0, Total=3422 [2024-11-28 02:40:15,698 INFO L435 NwaCegarLoop]: 86 mSDtfsCounter, 183 mSDsluCounter, 1668 mSDsCounter, 0 mSdLazyCounter, 1360 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 1754 SdHoareTripleChecker+Invalid, 1381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-28 02:40:15,698 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 1754 Invalid, 1381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1360 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-28 02:40:15,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2024-11-28 02:40:15,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 418. [2024-11-28 02:40:15,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 414 states have (on average 1.1111111111111112) internal successors, (460), 417 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:40:15,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 460 transitions. [2024-11-28 02:40:15,718 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 460 transitions. Word has length 45 [2024-11-28 02:40:15,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:40:15,719 INFO L471 AbstractCegarLoop]: Abstraction has 418 states and 460 transitions. [2024-11-28 02:40:15,719 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.84375) internal successors, (91), 32 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:40:15,719 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 460 transitions. [2024-11-28 02:40:15,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-28 02:40:15,720 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:40:15,720 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:40:15,730 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-28 02:40:15,920 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:40:15,921 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:40:15,921 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:40:15,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1689058021, now seen corresponding path program 3 times [2024-11-28 02:40:15,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:40:15,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206809386] [2024-11-28 02:40:15,922 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:40:15,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:40:15,950 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-28 02:40:15,950 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:40:16,767 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 15 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:40:16,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:40:16,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206809386] [2024-11-28 02:40:16,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206809386] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:40:16,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446065393] [2024-11-28 02:40:16,767 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:40:16,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:40:16,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:40:16,769 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:40:16,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-28 02:40:16,926 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-28 02:40:16,926 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:40:16,928 INFO L256 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-11-28 02:40:16,931 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:40:17,161 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 28 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:40:17,161 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:40:17,436 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 8 treesize of output 6 [2024-11-28 02:40:17,591 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 28 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:40:17,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446065393] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:40:17,592 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:40:17,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 35 [2024-11-28 02:40:17,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367689141] [2024-11-28 02:40:17,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:40:17,592 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-28 02:40:17,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:40:17,593 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-28 02:40:17,593 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1094, Unknown=0, NotChecked=0, Total=1260 [2024-11-28 02:40:17,593 INFO L87 Difference]: Start difference. First operand 418 states and 460 transitions. Second operand has 36 states, 35 states have (on average 3.057142857142857) internal successors, (107), 36 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:40:18,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:40:18,393 INFO L93 Difference]: Finished difference Result 620 states and 671 transitions. [2024-11-28 02:40:18,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-28 02:40:18,394 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 3.057142857142857) internal successors, (107), 36 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2024-11-28 02:40:18,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:40:18,395 INFO L225 Difference]: With dead ends: 620 [2024-11-28 02:40:18,395 INFO L226 Difference]: Without dead ends: 607 [2024-11-28 02:40:18,396 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 73 SyntacticMatches, 6 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 729 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=304, Invalid=1766, Unknown=0, NotChecked=0, Total=2070 [2024-11-28 02:40:18,397 INFO L435 NwaCegarLoop]: 51 mSDtfsCounter, 244 mSDsluCounter, 692 mSDsCounter, 0 mSdLazyCounter, 840 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 743 SdHoareTripleChecker+Invalid, 873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-28 02:40:18,397 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 743 Invalid, 873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 840 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-28 02:40:18,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2024-11-28 02:40:18,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 450. [2024-11-28 02:40:18,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 446 states have (on average 1.109865470852018) internal successors, (495), 449 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:40:18,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 495 transitions. [2024-11-28 02:40:18,406 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 495 transitions. Word has length 49 [2024-11-28 02:40:18,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:40:18,408 INFO L471 AbstractCegarLoop]: Abstraction has 450 states and 495 transitions. [2024-11-28 02:40:18,408 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 3.057142857142857) internal successors, (107), 36 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:40:18,409 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 495 transitions. [2024-11-28 02:40:18,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-28 02:40:18,410 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:40:18,410 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:40:18,420 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-28 02:40:18,610 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:40:18,610 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:40:18,611 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:40:18,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1114599424, now seen corresponding path program 1 times [2024-11-28 02:40:18,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:40:18,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464474157] [2024-11-28 02:40:18,611 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:40:18,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:40:18,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:40:19,178 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:40:19,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:40:19,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464474157] [2024-11-28 02:40:19,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464474157] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:40:19,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871767195] [2024-11-28 02:40:19,178 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:40:19,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:40:19,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:40:19,180 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:40:19,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-28 02:40:19,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:40:19,332 INFO L256 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 68 conjuncts are in the unsatisfiable core [2024-11-28 02:40:19,335 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:40:19,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:40:19,369 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 13 treesize of output 7 [2024-11-28 02:40:19,377 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 10 treesize of output 8 [2024-11-28 02:40:19,906 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:40:19,906 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:40:20,447 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 02:40:20,478 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:40:20,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871767195] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:40:20,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:40:20,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 14] total 37 [2024-11-28 02:40:20,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532391905] [2024-11-28 02:40:20,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:40:20,479 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-28 02:40:20,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:40:20,479 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-28 02:40:20,480 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1229, Unknown=0, NotChecked=0, Total=1406 [2024-11-28 02:40:20,480 INFO L87 Difference]: Start difference. First operand 450 states and 495 transitions. Second operand has 38 states, 37 states have (on average 3.918918918918919) internal successors, (145), 38 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:40:21,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:40:21,221 INFO L93 Difference]: Finished difference Result 508 states and 553 transitions. [2024-11-28 02:40:21,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-28 02:40:21,221 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 3.918918918918919) internal successors, (145), 38 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2024-11-28 02:40:21,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:40:21,222 INFO L225 Difference]: With dead ends: 508 [2024-11-28 02:40:21,222 INFO L226 Difference]: Without dead ends: 476 [2024-11-28 02:40:21,223 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=298, Invalid=1864, Unknown=0, NotChecked=0, Total=2162 [2024-11-28 02:40:21,223 INFO L435 NwaCegarLoop]: 51 mSDtfsCounter, 119 mSDsluCounter, 685 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 736 SdHoareTripleChecker+Invalid, 824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-28 02:40:21,224 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 736 Invalid, 824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 812 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-28 02:40:21,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2024-11-28 02:40:21,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 429. [2024-11-28 02:40:21,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 425 states have (on average 1.1105882352941177) internal successors, (472), 428 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:40:21,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 472 transitions. [2024-11-28 02:40:21,231 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 472 transitions. Word has length 51 [2024-11-28 02:40:21,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:40:21,231 INFO L471 AbstractCegarLoop]: Abstraction has 429 states and 472 transitions. [2024-11-28 02:40:21,231 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 3.918918918918919) internal successors, (145), 38 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:40:21,231 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 472 transitions. [2024-11-28 02:40:21,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-28 02:40:21,232 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:40:21,232 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2024-11-28 02:40:21,242 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-28 02:40:21,436 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:40:21,437 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:40:21,437 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:40:21,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1329621384, now seen corresponding path program 1 times [2024-11-28 02:40:21,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:40:21,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410832677] [2024-11-28 02:40:21,437 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:40:21,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:40:21,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:40:21,823 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-28 02:40:21,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:40:21,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410832677] [2024-11-28 02:40:21,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410832677] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:40:21,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52203907] [2024-11-28 02:40:21,824 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:40:21,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:40:21,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:40:21,826 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:40:21,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-28 02:40:21,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:40:21,980 INFO L256 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-28 02:40:21,982 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:40:22,054 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 02:40:22,199 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-28 02:40:22,199 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:40:22,235 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 13 [2024-11-28 02:40:22,237 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 16 treesize of output 12 [2024-11-28 02:40:22,299 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-28 02:40:22,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52203907] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:40:22,299 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:40:22,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 25 [2024-11-28 02:40:22,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33085381] [2024-11-28 02:40:22,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:40:22,300 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-28 02:40:22,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:40:22,300 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-28 02:40:22,300 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2024-11-28 02:40:22,300 INFO L87 Difference]: Start difference. First operand 429 states and 472 transitions. Second operand has 25 states, 25 states have (on average 3.4) internal successors, (85), 25 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:40:22,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:40:22,702 INFO L93 Difference]: Finished difference Result 687 states and 745 transitions. [2024-11-28 02:40:22,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-28 02:40:22,702 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.4) internal successors, (85), 25 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2024-11-28 02:40:22,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:40:22,704 INFO L225 Difference]: With dead ends: 687 [2024-11-28 02:40:22,704 INFO L226 Difference]: Without dead ends: 571 [2024-11-28 02:40:22,704 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=138, Invalid=1194, Unknown=0, NotChecked=0, Total=1332 [2024-11-28 02:40:22,705 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 33 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 02:40:22,705 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 394 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 02:40:22,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2024-11-28 02:40:22,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 504. [2024-11-28 02:40:22,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 500 states have (on average 1.106) internal successors, (553), 503 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:40:22,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 553 transitions. [2024-11-28 02:40:22,713 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 553 transitions. Word has length 51 [2024-11-28 02:40:22,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:40:22,713 INFO L471 AbstractCegarLoop]: Abstraction has 504 states and 553 transitions. [2024-11-28 02:40:22,713 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.4) internal successors, (85), 25 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:40:22,713 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 553 transitions. [2024-11-28 02:40:22,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-28 02:40:22,714 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:40:22,714 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:40:22,725 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-28 02:40:22,915 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:40:22,915 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:40:22,915 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:40:22,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1467687806, now seen corresponding path program 3 times [2024-11-28 02:40:22,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:40:22,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89832550] [2024-11-28 02:40:22,915 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:40:22,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:40:22,938 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-28 02:40:22,938 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:40:23,525 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:40:23,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:40:23,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89832550] [2024-11-28 02:40:23,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89832550] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:40:23,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205135218] [2024-11-28 02:40:23,525 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:40:23,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:40:23,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:40:23,527 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:40:23,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-28 02:40:23,687 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-28 02:40:23,687 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:40:23,689 INFO L256 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 71 conjuncts are in the unsatisfiable core [2024-11-28 02:40:23,692 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:40:23,710 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 13 treesize of output 1 [2024-11-28 02:40:23,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:40:23,714 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2024-11-28 02:40:24,420 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:40:24,420 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:40:25,223 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:40:25,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205135218] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:40:25,223 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:40:25,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 42 [2024-11-28 02:40:25,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121838980] [2024-11-28 02:40:25,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:40:25,224 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-28 02:40:25,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:40:25,224 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-28 02:40:25,225 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1626, Unknown=0, NotChecked=0, Total=1806 [2024-11-28 02:40:25,225 INFO L87 Difference]: Start difference. First operand 504 states and 553 transitions. Second operand has 43 states, 42 states have (on average 3.5) internal successors, (147), 43 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:40:27,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:40:27,443 INFO L93 Difference]: Finished difference Result 748 states and 800 transitions. [2024-11-28 02:40:27,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-28 02:40:27,444 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 3.5) internal successors, (147), 43 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2024-11-28 02:40:27,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:40:27,445 INFO L225 Difference]: With dead ends: 748 [2024-11-28 02:40:27,445 INFO L226 Difference]: Without dead ends: 714 [2024-11-28 02:40:27,446 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1047 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=613, Invalid=4357, Unknown=0, NotChecked=0, Total=4970 [2024-11-28 02:40:27,446 INFO L435 NwaCegarLoop]: 48 mSDtfsCounter, 392 mSDsluCounter, 741 mSDsCounter, 0 mSdLazyCounter, 1060 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 789 SdHoareTripleChecker+Invalid, 1134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1060 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-28 02:40:27,447 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [392 Valid, 789 Invalid, 1134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1060 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-28 02:40:27,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2024-11-28 02:40:27,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 500. [2024-11-28 02:40:27,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 496 states have (on average 1.1048387096774193) internal successors, (548), 499 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:40:27,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 548 transitions. [2024-11-28 02:40:27,455 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 548 transitions. Word has length 51 [2024-11-28 02:40:27,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:40:27,455 INFO L471 AbstractCegarLoop]: Abstraction has 500 states and 548 transitions. [2024-11-28 02:40:27,455 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 3.5) internal successors, (147), 43 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:40:27,455 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 548 transitions. [2024-11-28 02:40:27,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-28 02:40:27,456 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:40:27,456 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:40:27,467 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-28 02:40:27,660 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2024-11-28 02:40:27,661 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:40:27,661 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:40:27,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1000165465, now seen corresponding path program 7 times [2024-11-28 02:40:27,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:40:27,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375586382] [2024-11-28 02:40:27,661 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 02:40:27,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:40:27,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:40:28,222 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 28 proven. 85 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 02:40:28,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:40:28,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375586382] [2024-11-28 02:40:28,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375586382] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:40:28,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68271829] [2024-11-28 02:40:28,223 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 02:40:28,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:40:28,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:40:28,227 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:40:28,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-28 02:40:28,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:40:28,388 INFO L256 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 70 conjuncts are in the unsatisfiable core [2024-11-28 02:40:28,391 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:40:28,602 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 02:40:28,686 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 28 proven. 85 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 02:40:28,686 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:40:28,729 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 18 treesize of output 16 [2024-11-28 02:40:28,732 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2024-11-28 02:40:28,849 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 28 proven. 85 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 02:40:28,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68271829] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:40:28,849 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:40:28,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 30 [2024-11-28 02:40:28,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548145360] [2024-11-28 02:40:28,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:40:28,850 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-28 02:40:28,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:40:28,850 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-28 02:40:28,851 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=789, Unknown=0, NotChecked=0, Total=870 [2024-11-28 02:40:28,851 INFO L87 Difference]: Start difference. First operand 500 states and 548 transitions. Second operand has 30 states, 30 states have (on average 3.0) internal successors, (90), 30 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:40:29,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:40:29,427 INFO L93 Difference]: Finished difference Result 731 states and 789 transitions. [2024-11-28 02:40:29,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-28 02:40:29,427 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.0) internal successors, (90), 30 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2024-11-28 02:40:29,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:40:29,428 INFO L225 Difference]: With dead ends: 731 [2024-11-28 02:40:29,428 INFO L226 Difference]: Without dead ends: 660 [2024-11-28 02:40:29,429 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=115, Invalid=1145, Unknown=0, NotChecked=0, Total=1260 [2024-11-28 02:40:29,429 INFO L435 NwaCegarLoop]: 89 mSDtfsCounter, 65 mSDsluCounter, 1483 mSDsCounter, 0 mSdLazyCounter, 989 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 1572 SdHoareTripleChecker+Invalid, 1004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 989 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 02:40:29,429 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 1572 Invalid, 1004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 989 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 02:40:29,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2024-11-28 02:40:29,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 543. [2024-11-28 02:40:29,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 539 states have (on average 1.1094619666048238) internal successors, (598), 542 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:40:29,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 598 transitions. [2024-11-28 02:40:29,437 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 598 transitions. Word has length 55 [2024-11-28 02:40:29,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:40:29,437 INFO L471 AbstractCegarLoop]: Abstraction has 543 states and 598 transitions. [2024-11-28 02:40:29,437 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.0) internal successors, (90), 30 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:40:29,437 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 598 transitions. [2024-11-28 02:40:29,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-28 02:40:29,438 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:40:29,438 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:40:29,449 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-28 02:40:29,639 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2024-11-28 02:40:29,639 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:40:29,639 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:40:29,639 INFO L85 PathProgramCache]: Analyzing trace with hash -764334927, now seen corresponding path program 2 times [2024-11-28 02:40:29,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:40:29,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959151196] [2024-11-28 02:40:29,640 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:40:29,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:40:29,671 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:40:29,672 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:40:30,314 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 23 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:40:30,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:40:30,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959151196] [2024-11-28 02:40:30,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959151196] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:40:30,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609285191] [2024-11-28 02:40:30,315 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:40:30,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:40:30,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:40:30,318 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:40:30,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-28 02:40:30,495 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:40:30,495 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:40:30,497 INFO L256 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 87 conjuncts are in the unsatisfiable core [2024-11-28 02:40:30,501 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:40:30,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:40:30,574 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 13 treesize of output 7 [2024-11-28 02:40:30,582 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 10 treesize of output 8 [2024-11-28 02:40:33,108 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:40:33,108 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:40:34,624 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 02:40:34,756 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:40:34,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609285191] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:40:34,756 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:40:34,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 19, 20] total 51 [2024-11-28 02:40:34,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27333889] [2024-11-28 02:40:34,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:40:34,757 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-11-28 02:40:34,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:40:34,758 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-11-28 02:40:34,758 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=2320, Unknown=0, NotChecked=0, Total=2652 [2024-11-28 02:40:34,759 INFO L87 Difference]: Start difference. First operand 543 states and 598 transitions. Second operand has 52 states, 51 states have (on average 3.1176470588235294) internal successors, (159), 52 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:40:37,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:40:37,952 INFO L93 Difference]: Finished difference Result 698 states and 755 transitions. [2024-11-28 02:40:37,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-11-28 02:40:37,953 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 3.1176470588235294) internal successors, (159), 52 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2024-11-28 02:40:37,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:40:37,954 INFO L225 Difference]: With dead ends: 698 [2024-11-28 02:40:37,954 INFO L226 Difference]: Without dead ends: 696 [2024-11-28 02:40:37,956 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1930 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1036, Invalid=6274, Unknown=0, NotChecked=0, Total=7310 [2024-11-28 02:40:37,957 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 314 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 1271 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 614 SdHoareTripleChecker+Invalid, 1328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:40:37,957 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [314 Valid, 614 Invalid, 1328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1271 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-28 02:40:37,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2024-11-28 02:40:37,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 568. [2024-11-28 02:40:37,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 564 states have (on average 1.1063829787234043) internal successors, (624), 567 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:40:37,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 624 transitions. [2024-11-28 02:40:37,992 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 624 transitions. Word has length 55 [2024-11-28 02:40:37,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:40:37,992 INFO L471 AbstractCegarLoop]: Abstraction has 568 states and 624 transitions. [2024-11-28 02:40:37,992 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 3.1176470588235294) internal successors, (159), 52 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:40:37,992 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 624 transitions. [2024-11-28 02:40:37,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-28 02:40:37,993 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:40:37,993 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:40:38,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-11-28 02:40:38,194 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2024-11-28 02:40:38,195 INFO L396 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:40:38,195 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:40:38,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1325407524, now seen corresponding path program 3 times [2024-11-28 02:40:38,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:40:38,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423442029] [2024-11-28 02:40:38,196 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:40:38,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:40:38,240 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-28 02:40:38,241 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:40:39,046 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:40:39,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:40:39,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423442029] [2024-11-28 02:40:39,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423442029] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:40:39,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428760641] [2024-11-28 02:40:39,047 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:40:39,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:40:39,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:40:39,050 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:40:39,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-28 02:40:39,314 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-28 02:40:39,314 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:40:39,316 INFO L256 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-11-28 02:40:39,328 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:40:39,597 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 02:40:39,854 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 25 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:40:39,855 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:40:39,940 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 13 [2024-11-28 02:40:39,942 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 16 treesize of output 12 [2024-11-28 02:40:40,083 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 25 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:40:40,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428760641] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:40:40,084 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:40:40,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 14] total 37 [2024-11-28 02:40:40,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925179922] [2024-11-28 02:40:40,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:40:40,084 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-28 02:40:40,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:40:40,085 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-28 02:40:40,085 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1210, Unknown=0, NotChecked=0, Total=1332 [2024-11-28 02:40:40,085 INFO L87 Difference]: Start difference. First operand 568 states and 624 transitions. Second operand has 37 states, 37 states have (on average 3.2432432432432434) internal successors, (120), 37 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:40:40,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:40:40,816 INFO L93 Difference]: Finished difference Result 933 states and 1010 transitions. [2024-11-28 02:40:40,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-11-28 02:40:40,817 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.2432432432432434) internal successors, (120), 37 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2024-11-28 02:40:40,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:40:40,819 INFO L225 Difference]: With dead ends: 933 [2024-11-28 02:40:40,819 INFO L226 Difference]: Without dead ends: 739 [2024-11-28 02:40:40,820 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=202, Invalid=1960, Unknown=0, NotChecked=0, Total=2162 [2024-11-28 02:40:40,820 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 42 mSDsluCounter, 636 mSDsCounter, 0 mSdLazyCounter, 876 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 670 SdHoareTripleChecker+Invalid, 883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 876 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-28 02:40:40,820 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 670 Invalid, 883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 876 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-28 02:40:40,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2024-11-28 02:40:40,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 652. [2024-11-28 02:40:40,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 652 states, 648 states have (on average 1.1003086419753085) internal successors, (713), 651 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:40:40,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 713 transitions. [2024-11-28 02:40:40,829 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 713 transitions. Word has length 55 [2024-11-28 02:40:40,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:40:40,829 INFO L471 AbstractCegarLoop]: Abstraction has 652 states and 713 transitions. [2024-11-28 02:40:40,829 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.2432432432432434) internal successors, (120), 37 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:40:40,830 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 713 transitions. [2024-11-28 02:40:40,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-28 02:40:40,831 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:40:40,831 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:40:40,841 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-28 02:40:41,031 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2024-11-28 02:40:41,033 INFO L396 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:40:41,034 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:40:41,034 INFO L85 PathProgramCache]: Analyzing trace with hash -814937839, now seen corresponding path program 4 times [2024-11-28 02:40:41,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:40:41,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025867046] [2024-11-28 02:40:41,034 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:40:41,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:40:41,088 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:40:41,088 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:40:42,503 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:40:42,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:40:42,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025867046] [2024-11-28 02:40:42,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025867046] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:40:42,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495568300] [2024-11-28 02:40:42,504 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:40:42,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:40:42,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:40:42,508 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:40:42,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-28 02:40:42,694 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:40:42,694 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:40:42,697 INFO L256 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 91 conjuncts are in the unsatisfiable core [2024-11-28 02:40:42,700 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:40:42,749 INFO L349 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2024-11-28 02:40:42,749 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 1 case distinctions, treesize of input 13 treesize of output 11 [2024-11-28 02:40:42,763 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 10 treesize of output 8 [2024-11-28 02:40:44,229 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:40:44,229 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:40:45,637 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:40:45,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495568300] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:40:45,637 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:40:45,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19, 17] total 56 [2024-11-28 02:40:45,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974324435] [2024-11-28 02:40:45,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:40:45,638 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-11-28 02:40:45,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:40:45,638 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-11-28 02:40:45,639 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=2926, Unknown=0, NotChecked=0, Total=3192 [2024-11-28 02:40:45,639 INFO L87 Difference]: Start difference. First operand 652 states and 713 transitions. Second operand has 57 states, 56 states have (on average 2.9464285714285716) internal successors, (165), 57 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:40:51,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:40:51,718 INFO L93 Difference]: Finished difference Result 1032 states and 1124 transitions. [2024-11-28 02:40:51,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2024-11-28 02:40:51,718 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 2.9464285714285716) internal successors, (165), 57 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2024-11-28 02:40:51,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:40:51,722 INFO L225 Difference]: With dead ends: 1032 [2024-11-28 02:40:51,722 INFO L226 Difference]: Without dead ends: 1008 [2024-11-28 02:40:51,724 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5451 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=1597, Invalid=17309, Unknown=0, NotChecked=0, Total=18906 [2024-11-28 02:40:51,724 INFO L435 NwaCegarLoop]: 51 mSDtfsCounter, 373 mSDsluCounter, 1000 mSDsCounter, 0 mSdLazyCounter, 2044 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 1051 SdHoareTripleChecker+Invalid, 2132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 2044 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-28 02:40:51,724 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [373 Valid, 1051 Invalid, 2132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 2044 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-28 02:40:51,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1008 states. [2024-11-28 02:40:51,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1008 to 674. [2024-11-28 02:40:51,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 674 states, 670 states have (on average 1.1014925373134328) internal successors, (738), 673 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:40:51,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 674 states to 674 states and 738 transitions. [2024-11-28 02:40:51,733 INFO L78 Accepts]: Start accepts. Automaton has 674 states and 738 transitions. Word has length 58 [2024-11-28 02:40:51,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:40:51,734 INFO L471 AbstractCegarLoop]: Abstraction has 674 states and 738 transitions. [2024-11-28 02:40:51,734 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 2.9464285714285716) internal successors, (165), 57 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:40:51,734 INFO L276 IsEmpty]: Start isEmpty. Operand 674 states and 738 transitions. [2024-11-28 02:40:51,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-28 02:40:51,735 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:40:51,735 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:40:51,745 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-28 02:40:51,935 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2024-11-28 02:40:51,936 INFO L396 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:40:51,936 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:40:51,936 INFO L85 PathProgramCache]: Analyzing trace with hash -814946939, now seen corresponding path program 3 times [2024-11-28 02:40:51,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:40:51,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899706229] [2024-11-28 02:40:51,936 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:40:51,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:40:51,969 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-28 02:40:51,969 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:40:53,495 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 6 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:40:53,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:40:53,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899706229] [2024-11-28 02:40:53,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899706229] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:40:53,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107303209] [2024-11-28 02:40:53,495 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:40:53,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:40:53,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:40:53,499 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:40:53,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-28 02:40:53,695 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-28 02:40:53,695 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:40:53,697 INFO L256 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-11-28 02:40:53,700 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:40:53,768 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 13 treesize of output 1 [2024-11-28 02:40:53,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:40:53,776 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2024-11-28 02:40:54,709 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 15 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:40:54,709 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:40:55,617 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 02:40:55,717 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 28 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:40:55,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107303209] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:40:55,717 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:40:55,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17, 17] total 53 [2024-11-28 02:40:55,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576446479] [2024-11-28 02:40:55,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:40:55,718 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2024-11-28 02:40:55,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:40:55,718 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2024-11-28 02:40:55,719 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=2555, Unknown=0, NotChecked=0, Total=2862 [2024-11-28 02:40:55,719 INFO L87 Difference]: Start difference. First operand 674 states and 738 transitions. Second operand has 54 states, 53 states have (on average 3.2452830188679247) internal successors, (172), 54 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:40:58,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:40:58,237 INFO L93 Difference]: Finished difference Result 825 states and 887 transitions. [2024-11-28 02:40:58,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2024-11-28 02:40:58,238 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 53 states have (on average 3.2452830188679247) internal successors, (172), 54 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2024-11-28 02:40:58,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:40:58,239 INFO L225 Difference]: With dead ends: 825 [2024-11-28 02:40:58,239 INFO L226 Difference]: Without dead ends: 758 [2024-11-28 02:40:58,240 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2815 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1197, Invalid=8115, Unknown=0, NotChecked=0, Total=9312 [2024-11-28 02:40:58,240 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 390 mSDsluCounter, 716 mSDsCounter, 0 mSdLazyCounter, 1270 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 756 SdHoareTripleChecker+Invalid, 1331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-28 02:40:58,240 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [390 Valid, 756 Invalid, 1331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1270 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-28 02:40:58,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2024-11-28 02:40:58,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 618. [2024-11-28 02:40:58,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 618 states, 614 states have (on average 1.1026058631921825) internal successors, (677), 617 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:40:58,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 677 transitions. [2024-11-28 02:40:58,251 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 677 transitions. Word has length 58 [2024-11-28 02:40:58,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:40:58,251 INFO L471 AbstractCegarLoop]: Abstraction has 618 states and 677 transitions. [2024-11-28 02:40:58,251 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 53 states have (on average 3.2452830188679247) internal successors, (172), 54 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:40:58,251 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 677 transitions. [2024-11-28 02:40:58,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-28 02:40:58,252 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:40:58,252 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:40:58,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-11-28 02:40:58,453 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:40:58,453 INFO L396 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:40:58,453 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:40:58,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1243756370, now seen corresponding path program 8 times [2024-11-28 02:40:58,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:40:58,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117457899] [2024-11-28 02:40:58,453 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:40:58,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:40:58,470 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:40:58,470 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:40:59,267 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 28 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:40:59,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:40:59,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117457899] [2024-11-28 02:40:59,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117457899] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:40:59,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857905480] [2024-11-28 02:40:59,267 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:40:59,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:40:59,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:40:59,269 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:40:59,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-28 02:40:59,443 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:40:59,444 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:40:59,446 INFO L256 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 80 conjuncts are in the unsatisfiable core [2024-11-28 02:40:59,448 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:40:59,691 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 02:41:00,002 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 13 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:41:00,002 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:41:00,038 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 18 treesize of output 16 [2024-11-28 02:41:00,040 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2024-11-28 02:41:00,172 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 13 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:41:00,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857905480] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:41:00,172 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:41:00,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20, 20] total 39 [2024-11-28 02:41:00,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597178359] [2024-11-28 02:41:00,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:41:00,172 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-28 02:41:00,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:41:00,173 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-28 02:41:00,173 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1388, Unknown=0, NotChecked=0, Total=1482 [2024-11-28 02:41:00,173 INFO L87 Difference]: Start difference. First operand 618 states and 677 transitions. Second operand has 39 states, 39 states have (on average 3.051282051282051) internal successors, (119), 39 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:41:02,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:41:02,865 INFO L93 Difference]: Finished difference Result 1060 states and 1138 transitions. [2024-11-28 02:41:02,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2024-11-28 02:41:02,865 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.051282051282051) internal successors, (119), 39 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2024-11-28 02:41:02,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:41:02,867 INFO L225 Difference]: With dead ends: 1060 [2024-11-28 02:41:02,867 INFO L226 Difference]: Without dead ends: 963 [2024-11-28 02:41:02,868 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 787 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=311, Invalid=4659, Unknown=0, NotChecked=0, Total=4970 [2024-11-28 02:41:02,868 INFO L435 NwaCegarLoop]: 95 mSDtfsCounter, 184 mSDsluCounter, 2905 mSDsCounter, 0 mSdLazyCounter, 2605 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 3000 SdHoareTripleChecker+Invalid, 2632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 2605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-28 02:41:02,868 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 3000 Invalid, 2632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 2605 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-28 02:41:02,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2024-11-28 02:41:02,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 758. [2024-11-28 02:41:02,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 754 states have (on average 1.0994694960212201) internal successors, (829), 757 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:41:02,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 829 transitions. [2024-11-28 02:41:02,880 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 829 transitions. Word has length 59 [2024-11-28 02:41:02,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:41:02,880 INFO L471 AbstractCegarLoop]: Abstraction has 758 states and 829 transitions. [2024-11-28 02:41:02,880 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.051282051282051) internal successors, (119), 39 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:41:02,881 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 829 transitions. [2024-11-28 02:41:02,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-28 02:41:02,882 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:41:02,882 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:41:02,892 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-11-28 02:41:03,082 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:41:03,083 INFO L396 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:41:03,083 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:41:03,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1323602765, now seen corresponding path program 4 times [2024-11-28 02:41:03,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:41:03,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562974455] [2024-11-28 02:41:03,083 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:41:03,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:41:03,104 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:41:03,104 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:41:03,522 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 66 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:41:03,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:41:03,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562974455] [2024-11-28 02:41:03,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562974455] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:41:03,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649486772] [2024-11-28 02:41:03,522 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:41:03,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:41:03,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:41:03,524 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:41:03,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-28 02:41:03,783 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:41:03,783 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:41:03,785 INFO L256 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 80 conjuncts are in the unsatisfiable core [2024-11-28 02:41:03,788 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:41:04,183 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 66 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:41:04,183 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:41:04,530 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 23 treesize of output 19 [2024-11-28 02:41:04,869 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 66 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:41:04,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649486772] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:41:04,869 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:41:04,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 45 [2024-11-28 02:41:04,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277749260] [2024-11-28 02:41:04,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:41:04,870 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-11-28 02:41:04,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:41:04,870 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-11-28 02:41:04,871 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=1790, Unknown=0, NotChecked=0, Total=2070 [2024-11-28 02:41:04,871 INFO L87 Difference]: Start difference. First operand 758 states and 829 transitions. Second operand has 46 states, 45 states have (on average 3.511111111111111) internal successors, (158), 46 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:41:05,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:41:05,641 INFO L93 Difference]: Finished difference Result 1047 states and 1131 transitions. [2024-11-28 02:41:05,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-28 02:41:05,642 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 3.511111111111111) internal successors, (158), 46 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2024-11-28 02:41:05,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:41:05,644 INFO L225 Difference]: With dead ends: 1047 [2024-11-28 02:41:05,644 INFO L226 Difference]: Without dead ends: 1027 [2024-11-28 02:41:05,645 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=306, Invalid=1856, Unknown=0, NotChecked=0, Total=2162 [2024-11-28 02:41:05,645 INFO L435 NwaCegarLoop]: 95 mSDtfsCounter, 155 mSDsluCounter, 1504 mSDsCounter, 0 mSdLazyCounter, 1592 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 1599 SdHoareTripleChecker+Invalid, 1612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-28 02:41:05,645 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 1599 Invalid, 1612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1592 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-28 02:41:05,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1027 states. [2024-11-28 02:41:05,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1027 to 755. [2024-11-28 02:41:05,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 751 states have (on average 1.1011984021304926) internal successors, (827), 754 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:41:05,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 827 transitions. [2024-11-28 02:41:05,655 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 827 transitions. Word has length 63 [2024-11-28 02:41:05,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:41:05,655 INFO L471 AbstractCegarLoop]: Abstraction has 755 states and 827 transitions. [2024-11-28 02:41:05,655 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 3.511111111111111) internal successors, (158), 46 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:41:05,656 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 827 transitions. [2024-11-28 02:41:05,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-28 02:41:05,657 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:41:05,657 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:41:05,670 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-11-28 02:41:05,857 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2024-11-28 02:41:05,857 INFO L396 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:41:05,858 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:41:05,858 INFO L85 PathProgramCache]: Analyzing trace with hash 818843990, now seen corresponding path program 4 times [2024-11-28 02:41:05,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:41:05,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398190567] [2024-11-28 02:41:05,858 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:41:05,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:41:05,873 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:41:05,874 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:41:06,161 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 1 proven. 44 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 02:41:06,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:41:06,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398190567] [2024-11-28 02:41:06,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398190567] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:41:06,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227198637] [2024-11-28 02:41:06,162 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:41:06,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:41:06,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:41:06,164 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:41:06,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-28 02:41:06,417 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:41:06,417 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:41:06,419 INFO L256 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-28 02:41:06,421 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:41:06,563 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 02:41:06,563 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:41:06,780 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 02:41:06,817 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 02:41:06,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227198637] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:41:06,818 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:41:06,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 21 [2024-11-28 02:41:06,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621855179] [2024-11-28 02:41:06,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:41:06,818 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-28 02:41:06,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:41:06,818 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-28 02:41:06,818 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2024-11-28 02:41:06,819 INFO L87 Difference]: Start difference. First operand 755 states and 827 transitions. Second operand has 22 states, 21 states have (on average 4.285714285714286) internal successors, (90), 22 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:41:07,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:41:07,169 INFO L93 Difference]: Finished difference Result 861 states and 931 transitions. [2024-11-28 02:41:07,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-28 02:41:07,169 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 4.285714285714286) internal successors, (90), 22 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2024-11-28 02:41:07,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:41:07,171 INFO L225 Difference]: With dead ends: 861 [2024-11-28 02:41:07,171 INFO L226 Difference]: Without dead ends: 861 [2024-11-28 02:41:07,171 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 112 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2024-11-28 02:41:07,172 INFO L435 NwaCegarLoop]: 47 mSDtfsCounter, 20 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 585 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 02:41:07,172 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 585 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 02:41:07,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2024-11-28 02:41:07,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 803. [2024-11-28 02:41:07,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 799 states have (on average 1.0951188986232792) internal successors, (875), 802 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:41:07,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 875 transitions. [2024-11-28 02:41:07,190 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 875 transitions. Word has length 63 [2024-11-28 02:41:07,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:41:07,190 INFO L471 AbstractCegarLoop]: Abstraction has 803 states and 875 transitions. [2024-11-28 02:41:07,190 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 4.285714285714286) internal successors, (90), 22 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:41:07,191 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 875 transitions. [2024-11-28 02:41:07,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-11-28 02:41:07,192 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:41:07,192 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:41:07,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2024-11-28 02:41:07,392 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2024-11-28 02:41:07,392 INFO L396 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:41:07,393 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:41:07,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1324027715, now seen corresponding path program 9 times [2024-11-28 02:41:07,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:41:07,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135034155] [2024-11-28 02:41:07,393 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:41:07,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:41:07,426 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-11-28 02:41:07,426 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:41:08,327 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 45 proven. 138 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:41:08,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:41:08,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135034155] [2024-11-28 02:41:08,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135034155] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:41:08,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492704866] [2024-11-28 02:41:08,327 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:41:08,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:41:08,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:41:08,329 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:41:08,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-28 02:41:08,573 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-11-28 02:41:08,574 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:41:08,577 INFO L256 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 90 conjuncts are in the unsatisfiable core [2024-11-28 02:41:08,582 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:41:08,847 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 02:41:09,202 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 15 proven. 168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:41:09,202 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:41:09,247 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 18 treesize of output 16 [2024-11-28 02:41:09,249 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2024-11-28 02:41:09,377 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 15 proven. 168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:41:09,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492704866] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:41:09,377 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:41:09,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 22] total 44 [2024-11-28 02:41:09,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272691471] [2024-11-28 02:41:09,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:41:09,378 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-28 02:41:09,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:41:09,378 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-28 02:41:09,379 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1753, Unknown=0, NotChecked=0, Total=1892 [2024-11-28 02:41:09,379 INFO L87 Difference]: Start difference. First operand 803 states and 875 transitions. Second operand has 44 states, 44 states have (on average 3.022727272727273) internal successors, (133), 44 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:41:12,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:41:12,038 INFO L93 Difference]: Finished difference Result 1323 states and 1415 transitions. [2024-11-28 02:41:12,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2024-11-28 02:41:12,039 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.022727272727273) internal successors, (133), 44 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2024-11-28 02:41:12,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:41:12,041 INFO L225 Difference]: With dead ends: 1323 [2024-11-28 02:41:12,041 INFO L226 Difference]: Without dead ends: 1217 [2024-11-28 02:41:12,042 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1623 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=541, Invalid=6941, Unknown=0, NotChecked=0, Total=7482 [2024-11-28 02:41:12,042 INFO L435 NwaCegarLoop]: 106 mSDtfsCounter, 255 mSDsluCounter, 2598 mSDsCounter, 0 mSdLazyCounter, 2264 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 2704 SdHoareTripleChecker+Invalid, 2309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 2264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-28 02:41:12,042 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 2704 Invalid, 2309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 2264 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-28 02:41:12,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1217 states. [2024-11-28 02:41:12,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1217 to 904. [2024-11-28 02:41:12,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 900 states have (on average 1.0944444444444446) internal successors, (985), 903 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:41:12,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 985 transitions. [2024-11-28 02:41:12,049 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 985 transitions. Word has length 66 [2024-11-28 02:41:12,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:41:12,049 INFO L471 AbstractCegarLoop]: Abstraction has 904 states and 985 transitions. [2024-11-28 02:41:12,050 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.022727272727273) internal successors, (133), 44 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:41:12,050 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 985 transitions. [2024-11-28 02:41:12,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-11-28 02:41:12,051 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:41:12,051 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:41:12,062 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-11-28 02:41:12,255 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2024-11-28 02:41:12,256 INFO L396 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:41:12,256 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:41:12,256 INFO L85 PathProgramCache]: Analyzing trace with hash 315438178, now seen corresponding path program 5 times [2024-11-28 02:41:12,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:41:12,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437608826] [2024-11-28 02:41:12,256 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 02:41:12,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:41:12,285 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2024-11-28 02:41:12,285 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:41:12,923 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 91 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:41:12,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:41:12,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437608826] [2024-11-28 02:41:12,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437608826] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:41:12,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407182285] [2024-11-28 02:41:12,924 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 02:41:12,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:41:12,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:41:12,926 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:41:12,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-11-28 02:41:13,196 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2024-11-28 02:41:13,196 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:41:13,199 INFO L256 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 91 conjuncts are in the unsatisfiable core [2024-11-28 02:41:13,203 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:41:13,631 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 91 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:41:13,631 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:41:14,007 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 23 treesize of output 19 [2024-11-28 02:41:14,419 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 91 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:41:14,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407182285] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:41:14,420 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:41:14,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 50 [2024-11-28 02:41:14,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810205742] [2024-11-28 02:41:14,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:41:14,420 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-11-28 02:41:14,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:41:14,421 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-11-28 02:41:14,421 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=2206, Unknown=0, NotChecked=0, Total=2550 [2024-11-28 02:41:14,421 INFO L87 Difference]: Start difference. First operand 904 states and 985 transitions. Second operand has 51 states, 50 states have (on average 3.52) internal successors, (176), 51 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:41:15,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:41:15,376 INFO L93 Difference]: Finished difference Result 1259 states and 1354 transitions. [2024-11-28 02:41:15,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-28 02:41:15,377 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 3.52) internal successors, (176), 51 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2024-11-28 02:41:15,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:41:15,380 INFO L225 Difference]: With dead ends: 1259 [2024-11-28 02:41:15,380 INFO L226 Difference]: Without dead ends: 1239 [2024-11-28 02:41:15,380 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 680 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=373, Invalid=2279, Unknown=0, NotChecked=0, Total=2652 [2024-11-28 02:41:15,380 INFO L435 NwaCegarLoop]: 102 mSDtfsCounter, 212 mSDsluCounter, 1854 mSDsCounter, 0 mSdLazyCounter, 1961 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 1956 SdHoareTripleChecker+Invalid, 1987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1961 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-28 02:41:15,380 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 1956 Invalid, 1987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1961 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-28 02:41:15,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1239 states. [2024-11-28 02:41:15,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1239 to 904. [2024-11-28 02:41:15,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 900 states have (on average 1.0955555555555556) internal successors, (986), 903 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:41:15,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 986 transitions. [2024-11-28 02:41:15,387 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 986 transitions. Word has length 70 [2024-11-28 02:41:15,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:41:15,387 INFO L471 AbstractCegarLoop]: Abstraction has 904 states and 986 transitions. [2024-11-28 02:41:15,387 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 3.52) internal successors, (176), 51 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:41:15,387 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 986 transitions. [2024-11-28 02:41:15,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-11-28 02:41:15,388 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:41:15,388 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:41:15,395 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-11-28 02:41:15,591 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2024-11-28 02:41:15,592 INFO L396 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:41:15,592 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:41:15,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1548990273, now seen corresponding path program 5 times [2024-11-28 02:41:15,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:41:15,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075902902] [2024-11-28 02:41:15,592 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 02:41:15,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:41:15,617 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-28 02:41:15,617 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:41:16,182 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 15 proven. 54 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 02:41:16,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:41:16,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075902902] [2024-11-28 02:41:16,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075902902] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:41:16,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592233407] [2024-11-28 02:41:16,183 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 02:41:16,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:41:16,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:41:16,185 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:41:16,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-11-28 02:41:16,512 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-28 02:41:16,512 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:41:16,515 INFO L256 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-11-28 02:41:16,517 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:41:16,647 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 02:41:16,725 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 15 proven. 54 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 02:41:16,725 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:41:16,771 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 13 [2024-11-28 02:41:16,772 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 16 treesize of output 12 [2024-11-28 02:41:16,846 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 15 proven. 54 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 02:41:16,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592233407] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:41:16,846 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:41:16,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16, 16] total 29 [2024-11-28 02:41:16,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697401876] [2024-11-28 02:41:16,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:41:16,847 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-28 02:41:16,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:41:16,848 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-28 02:41:16,848 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2024-11-28 02:41:16,848 INFO L87 Difference]: Start difference. First operand 904 states and 986 transitions. Second operand has 29 states, 29 states have (on average 3.310344827586207) internal successors, (96), 29 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:41:17,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:41:17,273 INFO L93 Difference]: Finished difference Result 1433 states and 1550 transitions. [2024-11-28 02:41:17,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-28 02:41:17,274 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.310344827586207) internal successors, (96), 29 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2024-11-28 02:41:17,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:41:17,276 INFO L225 Difference]: With dead ends: 1433 [2024-11-28 02:41:17,276 INFO L226 Difference]: Without dead ends: 1242 [2024-11-28 02:41:17,277 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=133, Invalid=1127, Unknown=0, NotChecked=0, Total=1260 [2024-11-28 02:41:17,277 INFO L435 NwaCegarLoop]: 54 mSDtfsCounter, 41 mSDsluCounter, 934 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 988 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 02:41:17,277 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 988 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 637 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 02:41:17,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1242 states. [2024-11-28 02:41:17,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1242 to 1090. [2024-11-28 02:41:17,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1090 states, 1086 states have (on average 1.0939226519337018) internal successors, (1188), 1089 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:41:17,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1090 states to 1090 states and 1188 transitions. [2024-11-28 02:41:17,287 INFO L78 Accepts]: Start accepts. Automaton has 1090 states and 1188 transitions. Word has length 70 [2024-11-28 02:41:17,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:41:17,287 INFO L471 AbstractCegarLoop]: Abstraction has 1090 states and 1188 transitions. [2024-11-28 02:41:17,287 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.310344827586207) internal successors, (96), 29 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:41:17,287 INFO L276 IsEmpty]: Start isEmpty. Operand 1090 states and 1188 transitions. [2024-11-28 02:41:17,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-11-28 02:41:17,288 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:41:17,288 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:41:17,299 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2024-11-28 02:41:17,489 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:41:17,489 INFO L396 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:41:17,489 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:41:17,489 INFO L85 PathProgramCache]: Analyzing trace with hash 318953375, now seen corresponding path program 5 times [2024-11-28 02:41:17,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:41:17,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396782885] [2024-11-28 02:41:17,490 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 02:41:17,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:41:17,521 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-11-28 02:41:17,522 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:41:18,810 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:41:18,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:41:18,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396782885] [2024-11-28 02:41:18,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396782885] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:41:18,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060292709] [2024-11-28 02:41:18,810 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 02:41:18,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:41:18,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:41:18,812 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:41:18,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-11-28 02:41:19,056 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-11-28 02:41:19,056 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:41:19,060 INFO L256 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 103 conjuncts are in the unsatisfiable core [2024-11-28 02:41:19,066 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:41:19,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:41:19,114 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 13 treesize of output 7 [2024-11-28 02:41:19,117 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 10 treesize of output 8 [2024-11-28 02:41:20,624 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:41:20,625 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:41:22,787 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:41:22,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060292709] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:41:22,787 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:41:22,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 21] total 64 [2024-11-28 02:41:22,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994389712] [2024-11-28 02:41:22,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:41:22,788 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2024-11-28 02:41:22,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:41:22,789 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2024-11-28 02:41:22,789 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=3798, Unknown=0, NotChecked=0, Total=4160 [2024-11-28 02:41:22,789 INFO L87 Difference]: Start difference. First operand 1090 states and 1188 transitions. Second operand has 65 states, 64 states have (on average 3.234375) internal successors, (207), 65 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:41:31,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:41:31,068 INFO L93 Difference]: Finished difference Result 2010 states and 2177 transitions. [2024-11-28 02:41:31,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2024-11-28 02:41:31,068 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 64 states have (on average 3.234375) internal successors, (207), 65 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2024-11-28 02:41:31,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:41:31,072 INFO L225 Difference]: With dead ends: 2010 [2024-11-28 02:41:31,072 INFO L226 Difference]: Without dead ends: 1994 [2024-11-28 02:41:31,073 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5419 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=1721, Invalid=18019, Unknown=0, NotChecked=0, Total=19740 [2024-11-28 02:41:31,073 INFO L435 NwaCegarLoop]: 85 mSDtfsCounter, 663 mSDsluCounter, 2592 mSDsCounter, 0 mSdLazyCounter, 4633 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 663 SdHoareTripleChecker+Valid, 2677 SdHoareTripleChecker+Invalid, 4811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 4633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2024-11-28 02:41:31,073 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [663 Valid, 2677 Invalid, 4811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 4633 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2024-11-28 02:41:31,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1994 states. [2024-11-28 02:41:31,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1994 to 1345. [2024-11-28 02:41:31,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1345 states, 1341 states have (on average 1.087248322147651) internal successors, (1458), 1344 states have internal predecessors, (1458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:41:31,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1345 states to 1345 states and 1458 transitions. [2024-11-28 02:41:31,083 INFO L78 Accepts]: Start accepts. Automaton has 1345 states and 1458 transitions. Word has length 72 [2024-11-28 02:41:31,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:41:31,084 INFO L471 AbstractCegarLoop]: Abstraction has 1345 states and 1458 transitions. [2024-11-28 02:41:31,084 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 64 states have (on average 3.234375) internal successors, (207), 65 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:41:31,084 INFO L276 IsEmpty]: Start isEmpty. Operand 1345 states and 1458 transitions. [2024-11-28 02:41:31,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-11-28 02:41:31,085 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:41:31,085 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:41:31,093 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2024-11-28 02:41:31,285 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:41:31,286 INFO L396 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:41:31,286 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:41:31,286 INFO L85 PathProgramCache]: Analyzing trace with hash 318944275, now seen corresponding path program 4 times [2024-11-28 02:41:31,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:41:31,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582662186] [2024-11-28 02:41:31,286 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:41:31,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:41:31,318 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:41:31,318 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:41:32,578 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 28 proven. 99 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:41:32,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:41:32,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582662186] [2024-11-28 02:41:32,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582662186] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:41:32,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254756520] [2024-11-28 02:41:32,579 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:41:32,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:41:32,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:41:32,581 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:41:32,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-11-28 02:41:32,842 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:41:32,842 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:41:32,845 INFO L256 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 98 conjuncts are in the unsatisfiable core [2024-11-28 02:41:32,849 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:41:32,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:41:32,922 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 13 treesize of output 7 [2024-11-28 02:41:32,931 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 10 treesize of output 8 [2024-11-28 02:41:34,437 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 45 proven. 82 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:41:34,437 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:41:36,079 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 02:41:36,248 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 66 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:41:36,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254756520] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:41:36,249 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:41:36,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21, 21] total 64 [2024-11-28 02:41:36,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533168534] [2024-11-28 02:41:36,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:41:36,249 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2024-11-28 02:41:36,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:41:36,250 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2024-11-28 02:41:36,250 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=392, Invalid=3768, Unknown=0, NotChecked=0, Total=4160 [2024-11-28 02:41:36,251 INFO L87 Difference]: Start difference. First operand 1345 states and 1458 transitions. Second operand has 65 states, 64 states have (on average 3.34375) internal successors, (214), 65 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:41:39,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:41:39,873 INFO L93 Difference]: Finished difference Result 1794 states and 1906 transitions. [2024-11-28 02:41:39,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-11-28 02:41:39,873 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 64 states have (on average 3.34375) internal successors, (214), 65 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2024-11-28 02:41:39,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:41:39,876 INFO L225 Difference]: With dead ends: 1794 [2024-11-28 02:41:39,876 INFO L226 Difference]: Without dead ends: 1683 [2024-11-28 02:41:39,876 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2100 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=792, Invalid=6690, Unknown=0, NotChecked=0, Total=7482 [2024-11-28 02:41:39,877 INFO L435 NwaCegarLoop]: 88 mSDtfsCounter, 274 mSDsluCounter, 2269 mSDsCounter, 0 mSdLazyCounter, 3312 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 2357 SdHoareTripleChecker+Invalid, 3377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 3312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2024-11-28 02:41:39,877 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [274 Valid, 2357 Invalid, 3377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 3312 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2024-11-28 02:41:39,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1683 states. [2024-11-28 02:41:39,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1683 to 1263. [2024-11-28 02:41:39,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1263 states, 1259 states have (on average 1.0889594916600476) internal successors, (1371), 1262 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:41:39,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1263 states to 1263 states and 1371 transitions. [2024-11-28 02:41:39,890 INFO L78 Accepts]: Start accepts. Automaton has 1263 states and 1371 transitions. Word has length 72 [2024-11-28 02:41:39,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:41:39,890 INFO L471 AbstractCegarLoop]: Abstraction has 1263 states and 1371 transitions. [2024-11-28 02:41:39,890 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 64 states have (on average 3.34375) internal successors, (214), 65 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:41:39,891 INFO L276 IsEmpty]: Start isEmpty. Operand 1263 states and 1371 transitions. [2024-11-28 02:41:39,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-28 02:41:39,891 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:41:39,892 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:41:39,903 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2024-11-28 02:41:40,092 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2024-11-28 02:41:40,092 INFO L396 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:41:40,092 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:41:40,093 INFO L85 PathProgramCache]: Analyzing trace with hash 322960324, now seen corresponding path program 10 times [2024-11-28 02:41:40,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:41:40,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190660833] [2024-11-28 02:41:40,093 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:41:40,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:41:40,157 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:41:40,157 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:41:41,353 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 91 proven. 146 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:41:41,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:41:41,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190660833] [2024-11-28 02:41:41,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190660833] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:41:41,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518776655] [2024-11-28 02:41:41,353 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:41:41,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:41:41,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:41:41,356 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:41:41,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-11-28 02:41:41,657 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:41:41,657 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:41:41,660 INFO L256 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 100 conjuncts are in the unsatisfiable core [2024-11-28 02:41:41,663 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:41:42,064 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 02:41:42,545 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 17 proven. 220 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:41:42,545 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:41:42,604 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 18 treesize of output 16 [2024-11-28 02:41:42,610 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2024-11-28 02:41:42,820 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 17 proven. 220 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:41:42,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518776655] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:41:42,820 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:41:42,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 49 [2024-11-28 02:41:42,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306574073] [2024-11-28 02:41:42,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:41:42,821 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-28 02:41:42,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:41:42,822 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-28 02:41:42,822 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=2169, Unknown=0, NotChecked=0, Total=2352 [2024-11-28 02:41:42,822 INFO L87 Difference]: Start difference. First operand 1263 states and 1371 transitions. Second operand has 49 states, 49 states have (on average 2.979591836734694) internal successors, (146), 49 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:41:45,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:41:45,377 INFO L93 Difference]: Finished difference Result 2078 states and 2221 transitions. [2024-11-28 02:41:45,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-11-28 02:41:45,378 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.979591836734694) internal successors, (146), 49 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2024-11-28 02:41:45,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:41:45,380 INFO L225 Difference]: With dead ends: 2078 [2024-11-28 02:41:45,381 INFO L226 Difference]: Without dead ends: 2046 [2024-11-28 02:41:45,381 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=335, Invalid=4635, Unknown=0, NotChecked=0, Total=4970 [2024-11-28 02:41:45,381 INFO L435 NwaCegarLoop]: 108 mSDtfsCounter, 225 mSDsluCounter, 2932 mSDsCounter, 0 mSdLazyCounter, 3134 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 3040 SdHoareTripleChecker+Invalid, 3191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 3134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-11-28 02:41:45,381 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 3040 Invalid, 3191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 3134 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-11-28 02:41:45,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2046 states. [2024-11-28 02:41:45,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2046 to 1444. [2024-11-28 02:41:45,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1444 states, 1440 states have (on average 1.09375) internal successors, (1575), 1443 states have internal predecessors, (1575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:41:45,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1444 states to 1444 states and 1575 transitions. [2024-11-28 02:41:45,396 INFO L78 Accepts]: Start accepts. Automaton has 1444 states and 1575 transitions. Word has length 73 [2024-11-28 02:41:45,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:41:45,396 INFO L471 AbstractCegarLoop]: Abstraction has 1444 states and 1575 transitions. [2024-11-28 02:41:45,396 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.979591836734694) internal successors, (146), 49 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:41:45,396 INFO L276 IsEmpty]: Start isEmpty. Operand 1444 states and 1575 transitions. [2024-11-28 02:41:45,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-28 02:41:45,397 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:41:45,397 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:41:45,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2024-11-28 02:41:45,598 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2024-11-28 02:41:45,598 INFO L396 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:41:45,599 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:41:45,599 INFO L85 PathProgramCache]: Analyzing trace with hash -795196408, now seen corresponding path program 5 times [2024-11-28 02:41:45,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:41:45,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645238600] [2024-11-28 02:41:45,599 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 02:41:45,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:41:45,625 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-28 02:41:45,626 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:41:46,983 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 17 proven. 46 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 02:41:46,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:41:46,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645238600] [2024-11-28 02:41:46,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645238600] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:41:46,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335319356] [2024-11-28 02:41:46,984 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 02:41:46,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:41:46,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:41:46,986 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:41:46,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-11-28 02:41:47,289 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-28 02:41:47,290 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:41:47,292 INFO L256 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 81 conjuncts are in the unsatisfiable core [2024-11-28 02:41:47,296 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:41:47,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:41:47,373 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 13 treesize of output 7 [2024-11-28 02:41:47,379 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 10 treesize of output 8 [2024-11-28 02:41:49,373 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 5 proven. 58 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 02:41:49,373 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:41:50,957 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 02:41:51,127 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 15 proven. 48 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 02:41:51,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335319356] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:41:51,128 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:41:51,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19, 19] total 58 [2024-11-28 02:41:51,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460072399] [2024-11-28 02:41:51,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:41:51,128 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2024-11-28 02:41:51,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:41:51,129 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2024-11-28 02:41:51,129 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=3114, Unknown=0, NotChecked=0, Total=3422 [2024-11-28 02:41:51,130 INFO L87 Difference]: Start difference. First operand 1444 states and 1575 transitions. Second operand has 59 states, 58 states have (on average 3.3275862068965516) internal successors, (193), 59 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:41:53,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:41:53,811 INFO L93 Difference]: Finished difference Result 1844 states and 1981 transitions. [2024-11-28 02:41:53,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-28 02:41:53,812 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 3.3275862068965516) internal successors, (193), 59 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2024-11-28 02:41:53,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:41:53,816 INFO L225 Difference]: With dead ends: 1844 [2024-11-28 02:41:53,817 INFO L226 Difference]: Without dead ends: 1777 [2024-11-28 02:41:53,817 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1650 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=758, Invalid=5884, Unknown=0, NotChecked=0, Total=6642 [2024-11-28 02:41:53,818 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 213 mSDsluCounter, 1035 mSDsCounter, 0 mSdLazyCounter, 1859 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1080 SdHoareTripleChecker+Invalid, 1886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-28 02:41:53,818 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1080 Invalid, 1886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1859 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-28 02:41:53,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1777 states. [2024-11-28 02:41:53,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1777 to 1385. [2024-11-28 02:41:53,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1385 states, 1381 states have (on average 1.0963070238957278) internal successors, (1514), 1384 states have internal predecessors, (1514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:41:53,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1385 states to 1385 states and 1514 transitions. [2024-11-28 02:41:53,838 INFO L78 Accepts]: Start accepts. Automaton has 1385 states and 1514 transitions. Word has length 73 [2024-11-28 02:41:53,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:41:53,838 INFO L471 AbstractCegarLoop]: Abstraction has 1385 states and 1514 transitions. [2024-11-28 02:41:53,838 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 3.3275862068965516) internal successors, (193), 59 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:41:53,838 INFO L276 IsEmpty]: Start isEmpty. Operand 1385 states and 1514 transitions. [2024-11-28 02:41:53,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-11-28 02:41:53,840 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:41:53,840 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:41:53,853 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2024-11-28 02:41:54,041 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2024-11-28 02:41:54,042 INFO L396 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:41:54,042 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:41:54,042 INFO L85 PathProgramCache]: Analyzing trace with hash 723537382, now seen corresponding path program 6 times [2024-11-28 02:41:54,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:41:54,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577641969] [2024-11-28 02:41:54,042 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 02:41:54,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:41:54,073 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-28 02:41:54,073 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:41:54,225 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 19 proven. 24 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-11-28 02:41:54,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:41:54,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577641969] [2024-11-28 02:41:54,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577641969] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:41:54,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740736648] [2024-11-28 02:41:54,226 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 02:41:54,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:41:54,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:41:54,228 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:41:54,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-11-28 02:41:54,485 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-28 02:41:54,485 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:41:54,487 INFO L256 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-28 02:41:54,488 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:41:54,683 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 28 proven. 15 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-11-28 02:41:54,683 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:41:54,849 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 28 proven. 15 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-11-28 02:41:54,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740736648] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:41:54,849 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:41:54,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2024-11-28 02:41:54,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130976714] [2024-11-28 02:41:54,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:41:54,850 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-28 02:41:54,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:41:54,851 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-28 02:41:54,851 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=403, Unknown=0, NotChecked=0, Total=552 [2024-11-28 02:41:54,851 INFO L87 Difference]: Start difference. First operand 1385 states and 1514 transitions. Second operand has 24 states, 24 states have (on average 4.083333333333333) internal successors, (98), 24 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:41:55,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:41:55,098 INFO L93 Difference]: Finished difference Result 1369 states and 1493 transitions. [2024-11-28 02:41:55,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-28 02:41:55,099 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.083333333333333) internal successors, (98), 24 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2024-11-28 02:41:55,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:41:55,103 INFO L225 Difference]: With dead ends: 1369 [2024-11-28 02:41:55,103 INFO L226 Difference]: Without dead ends: 1355 [2024-11-28 02:41:55,103 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 132 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=244, Invalid=686, Unknown=0, NotChecked=0, Total=930 [2024-11-28 02:41:55,103 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 44 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 02:41:55,104 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 249 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 02:41:55,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1355 states. [2024-11-28 02:41:55,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1355 to 1352. [2024-11-28 02:41:55,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1352 states, 1348 states have (on average 1.0949554896142433) internal successors, (1476), 1351 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:41:55,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1352 states to 1352 states and 1476 transitions. [2024-11-28 02:41:55,118 INFO L78 Accepts]: Start accepts. Automaton has 1352 states and 1476 transitions. Word has length 74 [2024-11-28 02:41:55,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:41:55,118 INFO L471 AbstractCegarLoop]: Abstraction has 1352 states and 1476 transitions. [2024-11-28 02:41:55,118 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.083333333333333) internal successors, (98), 24 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:41:55,118 INFO L276 IsEmpty]: Start isEmpty. Operand 1352 states and 1476 transitions. [2024-11-28 02:41:55,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-11-28 02:41:55,120 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:41:55,120 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 3, 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] [2024-11-28 02:41:55,127 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2024-11-28 02:41:55,320 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2024-11-28 02:41:55,320 INFO L396 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:41:55,321 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:41:55,321 INFO L85 PathProgramCache]: Analyzing trace with hash 508147546, now seen corresponding path program 6 times [2024-11-28 02:41:55,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:41:55,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477563036] [2024-11-28 02:41:55,321 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 02:41:55,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:41:55,349 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-11-28 02:41:55,349 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:41:56,400 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 18 proven. 76 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 02:41:56,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:41:56,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477563036] [2024-11-28 02:41:56,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477563036] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:41:56,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171513595] [2024-11-28 02:41:56,401 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 02:41:56,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:41:56,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:41:56,402 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:41:56,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-11-28 02:41:56,779 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-11-28 02:41:56,780 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:41:56,783 INFO L256 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 101 conjuncts are in the unsatisfiable core [2024-11-28 02:41:56,787 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:41:56,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:41:56,797 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 13 treesize of output 7 [2024-11-28 02:41:56,802 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 10 treesize of output 8 [2024-11-28 02:41:58,069 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:41:58,069 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:41:59,569 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:41:59,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171513595] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:41:59,570 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:41:59,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 20] total 57 [2024-11-28 02:41:59,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484924451] [2024-11-28 02:41:59,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:41:59,570 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2024-11-28 02:41:59,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:41:59,571 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2024-11-28 02:41:59,571 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=322, Invalid=2984, Unknown=0, NotChecked=0, Total=3306 [2024-11-28 02:41:59,571 INFO L87 Difference]: Start difference. First operand 1352 states and 1476 transitions. Second operand has 58 states, 57 states have (on average 3.6315789473684212) internal successors, (207), 58 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:42:04,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:42:04,936 INFO L93 Difference]: Finished difference Result 1919 states and 2064 transitions. [2024-11-28 02:42:04,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2024-11-28 02:42:04,936 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 3.6315789473684212) internal successors, (207), 58 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2024-11-28 02:42:04,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:42:04,941 INFO L225 Difference]: With dead ends: 1919 [2024-11-28 02:42:04,941 INFO L226 Difference]: Without dead ends: 1909 [2024-11-28 02:42:04,942 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3518 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=1671, Invalid=13091, Unknown=0, NotChecked=0, Total=14762 [2024-11-28 02:42:04,943 INFO L435 NwaCegarLoop]: 72 mSDtfsCounter, 947 mSDsluCounter, 1339 mSDsCounter, 0 mSdLazyCounter, 2236 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 947 SdHoareTripleChecker+Valid, 1411 SdHoareTripleChecker+Invalid, 2422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 2236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-11-28 02:42:04,943 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [947 Valid, 1411 Invalid, 2422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 2236 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-11-28 02:42:04,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1909 states. [2024-11-28 02:42:04,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1909 to 1381. [2024-11-28 02:42:04,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1381 states, 1377 states have (on average 1.093681917211329) internal successors, (1506), 1380 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:42:04,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1381 states to 1381 states and 1506 transitions. [2024-11-28 02:42:04,982 INFO L78 Accepts]: Start accepts. Automaton has 1381 states and 1506 transitions. Word has length 76 [2024-11-28 02:42:04,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:42:04,982 INFO L471 AbstractCegarLoop]: Abstraction has 1381 states and 1506 transitions. [2024-11-28 02:42:04,982 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 3.6315789473684212) internal successors, (207), 58 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:42:04,982 INFO L276 IsEmpty]: Start isEmpty. Operand 1381 states and 1506 transitions. [2024-11-28 02:42:04,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-11-28 02:42:04,984 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:42:04,984 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:42:04,997 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2024-11-28 02:42:05,185 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2024-11-28 02:42:05,185 INFO L396 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:42:05,185 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:42:05,186 INFO L85 PathProgramCache]: Analyzing trace with hash 508138446, now seen corresponding path program 6 times [2024-11-28 02:42:05,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:42:05,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765406070] [2024-11-28 02:42:05,186 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 02:42:05,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:42:05,234 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-11-28 02:42:05,234 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:42:06,220 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 18 proven. 80 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-28 02:42:06,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:42:06,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765406070] [2024-11-28 02:42:06,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765406070] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:42:06,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918022007] [2024-11-28 02:42:06,221 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 02:42:06,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:42:06,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:42:06,223 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:42:06,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-11-28 02:42:06,588 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-11-28 02:42:06,588 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:42:06,591 INFO L256 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 102 conjuncts are in the unsatisfiable core [2024-11-28 02:42:06,595 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:42:06,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:42:06,661 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 13 treesize of output 7 [2024-11-28 02:42:06,667 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 10 treesize of output 8 [2024-11-28 02:42:08,212 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:42:08,213 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:42:10,014 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 02:42:10,153 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:42:10,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918022007] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:42:10,153 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:42:10,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 23, 24] total 65 [2024-11-28 02:42:10,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063217922] [2024-11-28 02:42:10,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:42:10,154 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2024-11-28 02:42:10,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:42:10,155 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2024-11-28 02:42:10,155 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=547, Invalid=3743, Unknown=0, NotChecked=0, Total=4290 [2024-11-28 02:42:10,159 INFO L87 Difference]: Start difference. First operand 1381 states and 1506 transitions. Second operand has 66 states, 65 states have (on average 3.276923076923077) internal successors, (213), 66 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:42:14,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:42:14,076 INFO L93 Difference]: Finished difference Result 1659 states and 1781 transitions. [2024-11-28 02:42:14,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2024-11-28 02:42:14,077 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 65 states have (on average 3.276923076923077) internal successors, (213), 66 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2024-11-28 02:42:14,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:42:14,079 INFO L225 Difference]: With dead ends: 1659 [2024-11-28 02:42:14,079 INFO L226 Difference]: Without dead ends: 1537 [2024-11-28 02:42:14,080 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3946 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=1722, Invalid=10268, Unknown=0, NotChecked=0, Total=11990 [2024-11-28 02:42:14,081 INFO L435 NwaCegarLoop]: 66 mSDtfsCounter, 506 mSDsluCounter, 1316 mSDsCounter, 0 mSdLazyCounter, 2108 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 506 SdHoareTripleChecker+Valid, 1382 SdHoareTripleChecker+Invalid, 2199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 2108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-28 02:42:14,081 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [506 Valid, 1382 Invalid, 2199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 2108 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-28 02:42:14,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1537 states. [2024-11-28 02:42:14,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1537 to 1112. [2024-11-28 02:42:14,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1112 states, 1108 states have (on average 1.1046931407942238) internal successors, (1224), 1111 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:42:14,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 1224 transitions. [2024-11-28 02:42:14,095 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 1224 transitions. Word has length 76 [2024-11-28 02:42:14,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:42:14,095 INFO L471 AbstractCegarLoop]: Abstraction has 1112 states and 1224 transitions. [2024-11-28 02:42:14,095 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 65 states have (on average 3.276923076923077) internal successors, (213), 66 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:42:14,096 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 1224 transitions. [2024-11-28 02:42:14,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2024-11-28 02:42:14,097 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:42:14,097 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:42:14,105 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2024-11-28 02:42:14,297 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:42:14,297 INFO L396 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:42:14,298 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:42:14,298 INFO L85 PathProgramCache]: Analyzing trace with hash -45790643, now seen corresponding path program 7 times [2024-11-28 02:42:14,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:42:14,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755346880] [2024-11-28 02:42:14,298 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 02:42:14,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:42:14,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:42:14,772 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 6 proven. 76 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-28 02:42:14,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:42:14,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755346880] [2024-11-28 02:42:14,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755346880] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:42:14,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567406693] [2024-11-28 02:42:14,773 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 02:42:14,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:42:14,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:42:14,777 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:42:14,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-11-28 02:42:15,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:42:15,052 INFO L256 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-11-28 02:42:15,054 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:42:15,329 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 15 proven. 67 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-28 02:42:15,330 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:42:15,704 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 02:42:15,804 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 15 proven. 67 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-28 02:42:15,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567406693] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:42:15,804 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:42:15,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 31 [2024-11-28 02:42:15,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214922865] [2024-11-28 02:42:15,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:42:15,804 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-28 02:42:15,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:42:15,805 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-28 02:42:15,805 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=875, Unknown=0, NotChecked=0, Total=992 [2024-11-28 02:42:15,805 INFO L87 Difference]: Start difference. First operand 1112 states and 1224 transitions. Second operand has 32 states, 31 states have (on average 4.32258064516129) internal successors, (134), 32 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:42:16,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:42:16,530 INFO L93 Difference]: Finished difference Result 1254 states and 1369 transitions. [2024-11-28 02:42:16,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-28 02:42:16,530 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 4.32258064516129) internal successors, (134), 32 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2024-11-28 02:42:16,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:42:16,533 INFO L225 Difference]: With dead ends: 1254 [2024-11-28 02:42:16,533 INFO L226 Difference]: Without dead ends: 1254 [2024-11-28 02:42:16,533 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 134 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=158, Invalid=1174, Unknown=0, NotChecked=0, Total=1332 [2024-11-28 02:42:16,533 INFO L435 NwaCegarLoop]: 57 mSDtfsCounter, 56 mSDsluCounter, 953 mSDsCounter, 0 mSdLazyCounter, 1055 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 1010 SdHoareTripleChecker+Invalid, 1055 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1055 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-28 02:42:16,533 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 1010 Invalid, 1055 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1055 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-28 02:42:16,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1254 states. [2024-11-28 02:42:16,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1254 to 1140. [2024-11-28 02:42:16,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1136 states have (on average 1.1038732394366197) internal successors, (1254), 1139 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:42:16,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 1254 transitions. [2024-11-28 02:42:16,547 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 1254 transitions. Word has length 78 [2024-11-28 02:42:16,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:42:16,547 INFO L471 AbstractCegarLoop]: Abstraction has 1140 states and 1254 transitions. [2024-11-28 02:42:16,547 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 4.32258064516129) internal successors, (134), 32 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:42:16,547 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 1254 transitions. [2024-11-28 02:42:16,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-11-28 02:42:16,549 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:42:16,549 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:42:16,562 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2024-11-28 02:42:16,750 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:42:16,750 INFO L396 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:42:16,750 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:42:16,750 INFO L85 PathProgramCache]: Analyzing trace with hash -943392922, now seen corresponding path program 7 times [2024-11-28 02:42:16,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:42:16,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192635351] [2024-11-28 02:42:16,751 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 02:42:16,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:42:16,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:42:17,888 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 45 proven. 126 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:42:17,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:42:17,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192635351] [2024-11-28 02:42:17,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192635351] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:42:17,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320546078] [2024-11-28 02:42:17,888 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 02:42:17,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:42:17,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:42:17,890 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:42:17,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-11-28 02:42:18,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:42:18,180 INFO L256 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 104 conjuncts are in the unsatisfiable core [2024-11-28 02:42:18,185 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:42:18,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:42:18,228 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 13 treesize of output 7 [2024-11-28 02:42:18,236 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 10 treesize of output 8 [2024-11-28 02:42:20,182 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 66 proven. 105 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:42:20,182 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:42:22,388 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 91 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:42:22,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320546078] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:42:22,389 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:42:22,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23, 22] total 64 [2024-11-28 02:42:22,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848710701] [2024-11-28 02:42:22,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:42:22,389 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2024-11-28 02:42:22,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:42:22,390 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2024-11-28 02:42:22,391 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=447, Invalid=3713, Unknown=0, NotChecked=0, Total=4160 [2024-11-28 02:42:22,391 INFO L87 Difference]: Start difference. First operand 1140 states and 1254 transitions. Second operand has 65 states, 64 states have (on average 3.625) internal successors, (232), 65 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:42:26,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:42:26,524 INFO L93 Difference]: Finished difference Result 1494 states and 1612 transitions. [2024-11-28 02:42:26,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-11-28 02:42:26,524 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 64 states have (on average 3.625) internal successors, (232), 65 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2024-11-28 02:42:26,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:42:26,526 INFO L225 Difference]: With dead ends: 1494 [2024-11-28 02:42:26,526 INFO L226 Difference]: Without dead ends: 1452 [2024-11-28 02:42:26,527 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2050 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=991, Invalid=8129, Unknown=0, NotChecked=0, Total=9120 [2024-11-28 02:42:26,527 INFO L435 NwaCegarLoop]: 107 mSDtfsCounter, 562 mSDsluCounter, 2386 mSDsCounter, 0 mSdLazyCounter, 3529 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 562 SdHoareTripleChecker+Valid, 2493 SdHoareTripleChecker+Invalid, 3634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 3529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2024-11-28 02:42:26,527 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [562 Valid, 2493 Invalid, 3634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 3529 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2024-11-28 02:42:26,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1452 states. [2024-11-28 02:42:26,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1452 to 1132. [2024-11-28 02:42:26,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1132 states, 1128 states have (on average 1.1028368794326242) internal successors, (1244), 1131 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:42:26,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1132 states to 1132 states and 1244 transitions. [2024-11-28 02:42:26,542 INFO L78 Accepts]: Start accepts. Automaton has 1132 states and 1244 transitions. Word has length 79 [2024-11-28 02:42:26,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:42:26,543 INFO L471 AbstractCegarLoop]: Abstraction has 1132 states and 1244 transitions. [2024-11-28 02:42:26,543 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 64 states have (on average 3.625) internal successors, (232), 65 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:42:26,543 INFO L276 IsEmpty]: Start isEmpty. Operand 1132 states and 1244 transitions. [2024-11-28 02:42:26,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-11-28 02:42:26,545 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:42:26,545 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:42:26,558 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2024-11-28 02:42:26,745 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:42:26,745 INFO L396 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:42:26,746 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:42:26,746 INFO L85 PathProgramCache]: Analyzing trace with hash 210558667, now seen corresponding path program 11 times [2024-11-28 02:42:26,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:42:26,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106810814] [2024-11-28 02:42:26,746 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 02:42:26,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:42:26,788 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2024-11-28 02:42:26,789 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:42:28,509 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 0 proven. 298 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:42:28,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:42:28,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106810814] [2024-11-28 02:42:28,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106810814] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:42:28,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226083830] [2024-11-28 02:42:28,509 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 02:42:28,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:42:28,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:42:28,512 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:42:28,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-11-28 02:42:28,840 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2024-11-28 02:42:28,841 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:42:28,844 INFO L256 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 110 conjuncts are in the unsatisfiable core [2024-11-28 02:42:28,849 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:42:29,479 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 02:42:30,262 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 19 proven. 279 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:42:30,263 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:42:30,322 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 18 treesize of output 16 [2024-11-28 02:42:30,324 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2024-11-28 02:42:30,570 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 19 proven. 279 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:42:30,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226083830] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:42:30,570 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:42:30,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 26, 26] total 56 [2024-11-28 02:42:30,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447397495] [2024-11-28 02:42:30,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:42:30,570 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-11-28 02:42:30,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:42:30,571 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-11-28 02:42:30,571 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=2959, Unknown=0, NotChecked=0, Total=3080 [2024-11-28 02:42:30,571 INFO L87 Difference]: Start difference. First operand 1132 states and 1244 transitions. Second operand has 56 states, 56 states have (on average 2.875) internal successors, (161), 56 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:42:36,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:42:36,630 INFO L93 Difference]: Finished difference Result 1863 states and 2011 transitions. [2024-11-28 02:42:36,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2024-11-28 02:42:36,631 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.875) internal successors, (161), 56 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2024-11-28 02:42:36,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:42:36,633 INFO L225 Difference]: With dead ends: 1863 [2024-11-28 02:42:36,633 INFO L226 Difference]: Without dead ends: 1779 [2024-11-28 02:42:36,634 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1257 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=377, Invalid=9523, Unknown=0, NotChecked=0, Total=9900 [2024-11-28 02:42:36,634 INFO L435 NwaCegarLoop]: 130 mSDtfsCounter, 244 mSDsluCounter, 5525 mSDsCounter, 0 mSdLazyCounter, 5016 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 5655 SdHoareTripleChecker+Invalid, 5060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 5016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2024-11-28 02:42:36,635 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 5655 Invalid, 5060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 5016 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2024-11-28 02:42:36,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1779 states. [2024-11-28 02:42:36,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1779 to 1282. [2024-11-28 02:42:36,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1282 states, 1278 states have (on average 1.1071987480438186) internal successors, (1415), 1281 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:42:36,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1282 states to 1282 states and 1415 transitions. [2024-11-28 02:42:36,648 INFO L78 Accepts]: Start accepts. Automaton has 1282 states and 1415 transitions. Word has length 80 [2024-11-28 02:42:36,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:42:36,648 INFO L471 AbstractCegarLoop]: Abstraction has 1282 states and 1415 transitions. [2024-11-28 02:42:36,648 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.875) internal successors, (161), 56 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:42:36,648 INFO L276 IsEmpty]: Start isEmpty. Operand 1282 states and 1415 transitions. [2024-11-28 02:42:36,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-11-28 02:42:36,649 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:42:36,649 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:42:36,659 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2024-11-28 02:42:36,850 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:42:36,850 INFO L396 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:42:36,850 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:42:36,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1137792307, now seen corresponding path program 7 times [2024-11-28 02:42:36,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:42:36,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362772954] [2024-11-28 02:42:36,851 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 02:42:36,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:42:36,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:42:38,201 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 02:42:38,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:42:38,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362772954] [2024-11-28 02:42:38,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362772954] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:42:38,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376480565] [2024-11-28 02:42:38,202 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 02:42:38,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:42:38,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:42:38,204 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:42:38,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-11-28 02:42:38,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:42:38,520 INFO L256 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 97 conjuncts are in the unsatisfiable core [2024-11-28 02:42:38,525 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:42:38,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:42:38,639 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 13 treesize of output 7 [2024-11-28 02:42:38,646 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 10 treesize of output 8 [2024-11-28 02:42:41,042 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 15 proven. 72 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 02:42:41,042 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:42:43,575 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 02:42:43,751 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 28 proven. 59 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 02:42:43,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376480565] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:42:43,751 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:42:43,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 24] total 66 [2024-11-28 02:42:43,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219703456] [2024-11-28 02:42:43,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:42:43,752 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2024-11-28 02:42:43,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:42:43,752 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2024-11-28 02:42:43,753 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=449, Invalid=3973, Unknown=0, NotChecked=0, Total=4422 [2024-11-28 02:42:43,753 INFO L87 Difference]: Start difference. First operand 1282 states and 1415 transitions. Second operand has 67 states, 66 states have (on average 3.242424242424242) internal successors, (214), 67 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:42:51,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:42:51,380 INFO L93 Difference]: Finished difference Result 1552 states and 1687 transitions. [2024-11-28 02:42:51,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2024-11-28 02:42:51,380 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 66 states have (on average 3.242424242424242) internal successors, (214), 67 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2024-11-28 02:42:51,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:42:51,382 INFO L225 Difference]: With dead ends: 1552 [2024-11-28 02:42:51,382 INFO L226 Difference]: Without dead ends: 1503 [2024-11-28 02:42:51,383 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5140 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=2180, Invalid=16180, Unknown=0, NotChecked=0, Total=18360 [2024-11-28 02:42:51,383 INFO L435 NwaCegarLoop]: 50 mSDtfsCounter, 531 mSDsluCounter, 1308 mSDsCounter, 0 mSdLazyCounter, 2528 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 531 SdHoareTripleChecker+Valid, 1358 SdHoareTripleChecker+Invalid, 2628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 2528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:42:51,383 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [531 Valid, 1358 Invalid, 2628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 2528 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-11-28 02:42:51,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1503 states. [2024-11-28 02:42:51,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1503 to 1313. [2024-11-28 02:42:51,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1313 states, 1309 states have (on average 1.1077158135981666) internal successors, (1450), 1312 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:42:51,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1313 states to 1313 states and 1450 transitions. [2024-11-28 02:42:51,394 INFO L78 Accepts]: Start accepts. Automaton has 1313 states and 1450 transitions. Word has length 80 [2024-11-28 02:42:51,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:42:51,394 INFO L471 AbstractCegarLoop]: Abstraction has 1313 states and 1450 transitions. [2024-11-28 02:42:51,394 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 66 states have (on average 3.242424242424242) internal successors, (214), 67 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:42:51,394 INFO L276 IsEmpty]: Start isEmpty. Operand 1313 states and 1450 transitions. [2024-11-28 02:42:51,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2024-11-28 02:42:51,396 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:42:51,396 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:42:51,410 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2024-11-28 02:42:51,596 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2024-11-28 02:42:51,597 INFO L396 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:42:51,597 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:42:51,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1483173390, now seen corresponding path program 12 times [2024-11-28 02:42:51,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:42:51,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419871274] [2024-11-28 02:42:51,597 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 02:42:51,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:42:51,649 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2024-11-28 02:42:51,650 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:42:53,248 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 120 proven. 215 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:42:53,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:42:53,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419871274] [2024-11-28 02:42:53,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419871274] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:42:53,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737267360] [2024-11-28 02:42:53,249 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 02:42:53,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:42:53,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:42:53,251 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:42:53,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2024-11-28 02:42:53,665 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2024-11-28 02:42:53,665 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:42:53,668 INFO L256 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 87 conjuncts are in the unsatisfiable core [2024-11-28 02:42:53,671 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:42:54,150 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 153 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:42:54,150 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:42:54,761 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 8 treesize of output 6 [2024-11-28 02:42:55,057 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 153 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:42:55,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737267360] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:42:55,057 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:42:55,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 54 [2024-11-28 02:42:55,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892213270] [2024-11-28 02:42:55,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:42:55,058 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2024-11-28 02:42:55,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:42:55,058 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2024-11-28 02:42:55,059 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=2588, Unknown=0, NotChecked=0, Total=2970 [2024-11-28 02:42:55,059 INFO L87 Difference]: Start difference. First operand 1313 states and 1450 transitions. Second operand has 55 states, 54 states have (on average 3.2222222222222223) internal successors, (174), 55 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:42:56,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:42:56,566 INFO L93 Difference]: Finished difference Result 1956 states and 2111 transitions. [2024-11-28 02:42:56,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-11-28 02:42:56,567 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 3.2222222222222223) internal successors, (174), 55 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2024-11-28 02:42:56,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:42:56,569 INFO L225 Difference]: With dead ends: 1956 [2024-11-28 02:42:56,569 INFO L226 Difference]: Without dead ends: 1837 [2024-11-28 02:42:56,570 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 128 SyntacticMatches, 11 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2070 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=841, Invalid=5011, Unknown=0, NotChecked=0, Total=5852 [2024-11-28 02:42:56,570 INFO L435 NwaCegarLoop]: 67 mSDtfsCounter, 407 mSDsluCounter, 1041 mSDsCounter, 0 mSdLazyCounter, 1331 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 1108 SdHoareTripleChecker+Invalid, 1387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-28 02:42:56,570 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [407 Valid, 1108 Invalid, 1387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1331 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-28 02:42:56,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1837 states. [2024-11-28 02:42:56,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1837 to 1428. [2024-11-28 02:42:56,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1428 states, 1424 states have (on average 1.0976123595505618) internal successors, (1563), 1427 states have internal predecessors, (1563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:42:56,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1428 states to 1428 states and 1563 transitions. [2024-11-28 02:42:56,585 INFO L78 Accepts]: Start accepts. Automaton has 1428 states and 1563 transitions. Word has length 84 [2024-11-28 02:42:56,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:42:56,585 INFO L471 AbstractCegarLoop]: Abstraction has 1428 states and 1563 transitions. [2024-11-28 02:42:56,585 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 54 states have (on average 3.2222222222222223) internal successors, (174), 55 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:42:56,585 INFO L276 IsEmpty]: Start isEmpty. Operand 1428 states and 1563 transitions. [2024-11-28 02:42:56,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-11-28 02:42:56,587 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:42:56,587 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:42:56,601 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2024-11-28 02:42:56,787 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2024-11-28 02:42:56,788 INFO L396 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:42:56,788 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:42:56,788 INFO L85 PathProgramCache]: Analyzing trace with hash 418962408, now seen corresponding path program 8 times [2024-11-28 02:42:56,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:42:56,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453908910] [2024-11-28 02:42:56,788 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:42:56,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:42:56,808 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:42:56,809 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:42:57,888 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 34 proven. 107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:42:57,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:42:57,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453908910] [2024-11-28 02:42:57,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453908910] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:42:57,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046255769] [2024-11-28 02:42:57,889 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:42:57,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:42:57,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:42:57,891 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:42:57,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2024-11-28 02:42:58,214 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:42:58,214 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:42:58,216 INFO L256 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-11-28 02:42:58,219 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:42:58,810 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 02:42:59,703 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 02:42:59,706 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 02:42:59,706 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 17 treesize of output 10 [2024-11-28 02:42:59,714 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 34 proven. 107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:42:59,714 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:43:00,022 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 13 [2024-11-28 02:43:00,025 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 24 treesize of output 20 [2024-11-28 02:43:00,990 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 47 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:43:00,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046255769] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:43:00,990 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:43:00,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23, 23] total 58 [2024-11-28 02:43:00,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945121726] [2024-11-28 02:43:00,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:43:00,990 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2024-11-28 02:43:00,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:43:00,991 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2024-11-28 02:43:00,991 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=342, Invalid=2964, Unknown=0, NotChecked=0, Total=3306 [2024-11-28 02:43:00,991 INFO L87 Difference]: Start difference. First operand 1428 states and 1563 transitions. Second operand has 58 states, 58 states have (on average 3.5) internal successors, (203), 58 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:43:01,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:43:01,973 INFO L93 Difference]: Finished difference Result 1461 states and 1585 transitions. [2024-11-28 02:43:01,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-28 02:43:01,973 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 3.5) internal successors, (203), 58 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2024-11-28 02:43:01,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:43:01,976 INFO L225 Difference]: With dead ends: 1461 [2024-11-28 02:43:01,976 INFO L226 Difference]: Without dead ends: 1289 [2024-11-28 02:43:01,976 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 897 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=443, Invalid=3589, Unknown=0, NotChecked=0, Total=4032 [2024-11-28 02:43:01,976 INFO L435 NwaCegarLoop]: 47 mSDtfsCounter, 29 mSDsluCounter, 937 mSDsCounter, 0 mSdLazyCounter, 1123 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 984 SdHoareTripleChecker+Invalid, 1129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-28 02:43:01,976 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 984 Invalid, 1129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1123 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-28 02:43:01,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1289 states. [2024-11-28 02:43:01,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1289 to 1289. [2024-11-28 02:43:01,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1289 states, 1285 states have (on average 1.0980544747081713) internal successors, (1411), 1288 states have internal predecessors, (1411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:43:01,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1289 states to 1289 states and 1411 transitions. [2024-11-28 02:43:01,983 INFO L78 Accepts]: Start accepts. Automaton has 1289 states and 1411 transitions. Word has length 85 [2024-11-28 02:43:01,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:43:01,984 INFO L471 AbstractCegarLoop]: Abstraction has 1289 states and 1411 transitions. [2024-11-28 02:43:01,984 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 3.5) internal successors, (203), 58 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:43:01,984 INFO L276 IsEmpty]: Start isEmpty. Operand 1289 states and 1411 transitions. [2024-11-28 02:43:01,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-11-28 02:43:01,985 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:43:01,985 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:43:01,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2024-11-28 02:43:02,186 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2024-11-28 02:43:02,186 INFO L396 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:43:02,186 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:43:02,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1967730415, now seen corresponding path program 2 times [2024-11-28 02:43:02,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:43:02,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392580417] [2024-11-28 02:43:02,186 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:43:02,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:43:02,207 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:43:02,207 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:43:03,192 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 66 proven. 157 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:43:03,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:43:03,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392580417] [2024-11-28 02:43:03,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392580417] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:43:03,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745484807] [2024-11-28 02:43:03,192 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:43:03,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:43:03,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:43:03,194 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:43:03,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2024-11-28 02:43:03,479 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:43:03,479 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:43:03,482 INFO L256 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 118 conjuncts are in the unsatisfiable core [2024-11-28 02:43:03,486 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:43:03,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:43:03,517 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 13 treesize of output 7 [2024-11-28 02:43:03,524 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-28 02:43:04,742 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 0 proven. 223 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:43:04,742 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:43:06,753 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 02:43:06,814 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 0 proven. 223 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:43:06,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745484807] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:43:06,815 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:43:06,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 24] total 67 [2024-11-28 02:43:06,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229453141] [2024-11-28 02:43:06,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:43:06,815 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2024-11-28 02:43:06,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:43:06,816 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2024-11-28 02:43:06,817 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=514, Invalid=4042, Unknown=0, NotChecked=0, Total=4556 [2024-11-28 02:43:06,817 INFO L87 Difference]: Start difference. First operand 1289 states and 1411 transitions. Second operand has 68 states, 67 states have (on average 3.7313432835820897) internal successors, (250), 68 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:43:08,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:43:08,745 INFO L93 Difference]: Finished difference Result 1394 states and 1515 transitions. [2024-11-28 02:43:08,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-28 02:43:08,746 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 67 states have (on average 3.7313432835820897) internal successors, (250), 68 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2024-11-28 02:43:08,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:43:08,748 INFO L225 Difference]: With dead ends: 1394 [2024-11-28 02:43:08,748 INFO L226 Difference]: Without dead ends: 1300 [2024-11-28 02:43:08,748 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1784 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=790, Invalid=5852, Unknown=0, NotChecked=0, Total=6642 [2024-11-28 02:43:08,749 INFO L435 NwaCegarLoop]: 54 mSDtfsCounter, 114 mSDsluCounter, 1167 mSDsCounter, 0 mSdLazyCounter, 1696 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 1221 SdHoareTripleChecker+Invalid, 1714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:43:08,749 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 1221 Invalid, 1714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1696 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-28 02:43:08,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1300 states. [2024-11-28 02:43:08,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1300 to 1253. [2024-11-28 02:43:08,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1253 states, 1249 states have (on average 1.098478783026421) internal successors, (1372), 1252 states have internal predecessors, (1372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:43:08,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1253 states to 1253 states and 1372 transitions. [2024-11-28 02:43:08,758 INFO L78 Accepts]: Start accepts. Automaton has 1253 states and 1372 transitions. Word has length 86 [2024-11-28 02:43:08,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:43:08,759 INFO L471 AbstractCegarLoop]: Abstraction has 1253 states and 1372 transitions. [2024-11-28 02:43:08,759 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 67 states have (on average 3.7313432835820897) internal successors, (250), 68 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:43:08,759 INFO L276 IsEmpty]: Start isEmpty. Operand 1253 states and 1372 transitions. [2024-11-28 02:43:08,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-11-28 02:43:08,760 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:43:08,760 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:43:08,775 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2024-11-28 02:43:08,960 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:43:08,961 INFO L396 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:43:08,961 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:43:08,961 INFO L85 PathProgramCache]: Analyzing trace with hash -760478931, now seen corresponding path program 8 times [2024-11-28 02:43:08,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:43:08,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234706078] [2024-11-28 02:43:08,961 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:43:08,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:43:08,995 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:43:08,995 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:43:10,500 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 0 proven. 223 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:43:10,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:43:10,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234706078] [2024-11-28 02:43:10,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234706078] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:43:10,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288908290] [2024-11-28 02:43:10,501 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:43:10,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:43:10,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:43:10,503 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:43:10,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2024-11-28 02:43:10,835 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:43:10,835 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:43:10,838 INFO L256 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 124 conjuncts are in the unsatisfiable core [2024-11-28 02:43:10,843 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:43:10,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:43:10,854 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 13 treesize of output 7 [2024-11-28 02:43:10,860 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 10 treesize of output 8 [2024-11-28 02:43:12,911 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 0 proven. 223 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:43:12,911 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:43:15,888 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 0 proven. 223 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:43:15,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288908290] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:43:15,889 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:43:15,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 74 [2024-11-28 02:43:15,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035381228] [2024-11-28 02:43:15,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:43:15,889 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2024-11-28 02:43:15,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:43:15,890 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2024-11-28 02:43:15,891 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=466, Invalid=5084, Unknown=0, NotChecked=0, Total=5550 [2024-11-28 02:43:15,891 INFO L87 Difference]: Start difference. First operand 1253 states and 1372 transitions. Second operand has 75 states, 74 states have (on average 3.364864864864865) internal successors, (249), 75 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:43:32,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:43:32,155 INFO L93 Difference]: Finished difference Result 1958 states and 2099 transitions. [2024-11-28 02:43:32,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2024-11-28 02:43:32,156 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 74 states have (on average 3.364864864864865) internal successors, (249), 75 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2024-11-28 02:43:32,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:43:32,158 INFO L225 Difference]: With dead ends: 1958 [2024-11-28 02:43:32,158 INFO L226 Difference]: Without dead ends: 1950 [2024-11-28 02:43:32,160 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8304 ImplicationChecksByTransitivity, 16.0s TimeCoverageRelationStatistics Valid=3221, Invalid=32689, Unknown=0, NotChecked=0, Total=35910 [2024-11-28 02:43:32,160 INFO L435 NwaCegarLoop]: 121 mSDtfsCounter, 954 mSDsluCounter, 3707 mSDsCounter, 0 mSdLazyCounter, 5955 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 954 SdHoareTripleChecker+Valid, 3828 SdHoareTripleChecker+Invalid, 6163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 5955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2024-11-28 02:43:32,161 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [954 Valid, 3828 Invalid, 6163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 5955 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2024-11-28 02:43:32,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1950 states. [2024-11-28 02:43:32,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1950 to 1332. [2024-11-28 02:43:32,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1332 states, 1328 states have (on average 1.0941265060240963) internal successors, (1453), 1331 states have internal predecessors, (1453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:43:32,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1332 states to 1332 states and 1453 transitions. [2024-11-28 02:43:32,177 INFO L78 Accepts]: Start accepts. Automaton has 1332 states and 1453 transitions. Word has length 86 [2024-11-28 02:43:32,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:43:32,177 INFO L471 AbstractCegarLoop]: Abstraction has 1332 states and 1453 transitions. [2024-11-28 02:43:32,177 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 74 states have (on average 3.364864864864865) internal successors, (249), 75 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:43:32,177 INFO L276 IsEmpty]: Start isEmpty. Operand 1332 states and 1453 transitions. [2024-11-28 02:43:32,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-11-28 02:43:32,179 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:43:32,179 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:43:32,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2024-11-28 02:43:32,379 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:43:32,379 INFO L396 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:43:32,380 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:43:32,380 INFO L85 PathProgramCache]: Analyzing trace with hash -760488031, now seen corresponding path program 8 times [2024-11-28 02:43:32,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:43:32,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194903652] [2024-11-28 02:43:32,380 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:43:32,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:43:32,411 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:43:32,411 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:43:33,726 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 66 proven. 158 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:43:33,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:43:33,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194903652] [2024-11-28 02:43:33,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194903652] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:43:33,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502042746] [2024-11-28 02:43:33,726 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:43:33,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:43:33,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:43:33,728 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:43:33,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2024-11-28 02:43:34,074 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:43:34,074 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:43:34,078 INFO L256 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 114 conjuncts are in the unsatisfiable core [2024-11-28 02:43:34,083 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:43:34,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:43:34,158 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 13 treesize of output 7 [2024-11-28 02:43:34,164 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 10 treesize of output 8 [2024-11-28 02:43:36,119 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 91 proven. 133 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:43:36,119 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:43:38,456 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 02:43:38,618 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 104 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:43:38,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502042746] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:43:38,618 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:43:38,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25, 25] total 71 [2024-11-28 02:43:38,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903174510] [2024-11-28 02:43:38,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:43:38,619 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2024-11-28 02:43:38,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:43:38,620 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2024-11-28 02:43:38,620 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=4480, Unknown=0, NotChecked=0, Total=5112 [2024-11-28 02:43:38,620 INFO L87 Difference]: Start difference. First operand 1332 states and 1453 transitions. Second operand has 72 states, 71 states have (on average 3.6056338028169015) internal successors, (256), 72 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:43:41,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:43:41,910 INFO L93 Difference]: Finished difference Result 1939 states and 2061 transitions. [2024-11-28 02:43:41,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2024-11-28 02:43:41,910 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 71 states have (on average 3.6056338028169015) internal successors, (256), 72 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2024-11-28 02:43:41,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:43:41,913 INFO L225 Difference]: With dead ends: 1939 [2024-11-28 02:43:41,913 INFO L226 Difference]: Without dead ends: 1781 [2024-11-28 02:43:41,913 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2667 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=1211, Invalid=7909, Unknown=0, NotChecked=0, Total=9120 [2024-11-28 02:43:41,914 INFO L435 NwaCegarLoop]: 104 mSDtfsCounter, 483 mSDsluCounter, 1838 mSDsCounter, 0 mSdLazyCounter, 2538 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 483 SdHoareTripleChecker+Valid, 1942 SdHoareTripleChecker+Invalid, 2639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 2538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-28 02:43:41,914 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [483 Valid, 1942 Invalid, 2639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 2538 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-28 02:43:41,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1781 states. [2024-11-28 02:43:41,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1781 to 1247. [2024-11-28 02:43:41,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1247 states, 1243 states have (on average 1.0949316170555108) internal successors, (1361), 1246 states have internal predecessors, (1361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:43:41,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1247 states to 1247 states and 1361 transitions. [2024-11-28 02:43:41,931 INFO L78 Accepts]: Start accepts. Automaton has 1247 states and 1361 transitions. Word has length 86 [2024-11-28 02:43:41,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:43:41,932 INFO L471 AbstractCegarLoop]: Abstraction has 1247 states and 1361 transitions. [2024-11-28 02:43:41,932 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 71 states have (on average 3.6056338028169015) internal successors, (256), 72 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:43:41,932 INFO L276 IsEmpty]: Start isEmpty. Operand 1247 states and 1361 transitions. [2024-11-28 02:43:41,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-11-28 02:43:41,934 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:43:41,934 INFO L218 NwaCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:43:41,946 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2024-11-28 02:43:42,134 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:43:42,134 INFO L396 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:43:42,136 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:43:42,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1565014344, now seen corresponding path program 6 times [2024-11-28 02:43:42,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:43:42,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871074128] [2024-11-28 02:43:42,137 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 02:43:42,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:43:42,189 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2024-11-28 02:43:42,189 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:43:43,525 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 120 proven. 246 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:43:43,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:43:43,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871074128] [2024-11-28 02:43:43,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871074128] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:43:43,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27999331] [2024-11-28 02:43:43,525 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 02:43:43,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:43:43,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:43:43,527 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:43:43,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2024-11-28 02:43:44,026 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2024-11-28 02:43:44,026 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:43:44,030 INFO L256 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 120 conjuncts are in the unsatisfiable core [2024-11-28 02:43:44,035 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:43:44,479 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 02:43:45,151 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 21 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:43:45,151 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:43:45,220 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 18 treesize of output 16 [2024-11-28 02:43:45,222 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2024-11-28 02:43:45,429 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 21 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:43:45,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27999331] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:43:45,430 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:43:45,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 57 [2024-11-28 02:43:45,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349919059] [2024-11-28 02:43:45,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:43:45,430 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-11-28 02:43:45,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:43:45,431 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-11-28 02:43:45,431 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=2978, Unknown=0, NotChecked=0, Total=3192 [2024-11-28 02:43:45,432 INFO L87 Difference]: Start difference. First operand 1247 states and 1361 transitions. Second operand has 57 states, 57 states have (on average 3.1228070175438596) internal successors, (178), 57 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:43:50,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:43:50,367 INFO L93 Difference]: Finished difference Result 2396 states and 2547 transitions. [2024-11-28 02:43:50,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2024-11-28 02:43:50,367 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 3.1228070175438596) internal successors, (178), 57 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2024-11-28 02:43:50,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:43:50,372 INFO L225 Difference]: With dead ends: 2396 [2024-11-28 02:43:50,372 INFO L226 Difference]: Without dead ends: 2197 [2024-11-28 02:43:50,373 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2332 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=828, Invalid=10092, Unknown=0, NotChecked=0, Total=10920 [2024-11-28 02:43:50,374 INFO L435 NwaCegarLoop]: 110 mSDtfsCounter, 857 mSDsluCounter, 3416 mSDsCounter, 0 mSdLazyCounter, 3858 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 857 SdHoareTripleChecker+Valid, 3526 SdHoareTripleChecker+Invalid, 3979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 3858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:43:50,374 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [857 Valid, 3526 Invalid, 3979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 3858 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-11-28 02:43:50,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2197 states. [2024-11-28 02:43:50,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2197 to 1387. [2024-11-28 02:43:50,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1387 states, 1383 states have (on average 1.0968908170643528) internal successors, (1517), 1386 states have internal predecessors, (1517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:43:50,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1387 states to 1387 states and 1517 transitions. [2024-11-28 02:43:50,396 INFO L78 Accepts]: Start accepts. Automaton has 1387 states and 1517 transitions. Word has length 87 [2024-11-28 02:43:50,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:43:50,396 INFO L471 AbstractCegarLoop]: Abstraction has 1387 states and 1517 transitions. [2024-11-28 02:43:50,396 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 3.1228070175438596) internal successors, (178), 57 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:43:50,396 INFO L276 IsEmpty]: Start isEmpty. Operand 1387 states and 1517 transitions. [2024-11-28 02:43:50,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2024-11-28 02:43:50,398 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:43:50,398 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:43:50,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2024-11-28 02:43:50,598 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:43:50,599 INFO L396 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:43:50,599 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:43:50,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1066920225, now seen corresponding path program 9 times [2024-11-28 02:43:50,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:43:50,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063010890] [2024-11-28 02:43:50,600 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:43:50,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:43:50,645 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-28 02:43:50,645 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:43:51,330 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 19 proven. 94 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-28 02:43:51,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:43:51,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063010890] [2024-11-28 02:43:51,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063010890] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:43:51,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606791016] [2024-11-28 02:43:51,331 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:43:51,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:43:51,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:43:51,333 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:43:51,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2024-11-28 02:43:51,804 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-28 02:43:51,804 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:43:51,808 INFO L256 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 96 conjuncts are in the unsatisfiable core [2024-11-28 02:43:51,812 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:43:52,420 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 02:43:53,002 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 19 proven. 138 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:43:53,002 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:43:53,131 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 13 [2024-11-28 02:43:53,133 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 16 treesize of output 12 [2024-11-28 02:43:53,390 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 19 proven. 94 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-28 02:43:53,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606791016] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:43:53,390 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:43:53,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 27, 18] total 55 [2024-11-28 02:43:53,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871235584] [2024-11-28 02:43:53,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:43:53,391 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2024-11-28 02:43:53,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:43:53,391 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2024-11-28 02:43:53,392 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=2775, Unknown=0, NotChecked=0, Total=2970 [2024-11-28 02:43:53,392 INFO L87 Difference]: Start difference. First operand 1387 states and 1517 transitions. Second operand has 55 states, 55 states have (on average 3.4363636363636365) internal successors, (189), 55 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:43:54,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:43:54,775 INFO L93 Difference]: Finished difference Result 2037 states and 2237 transitions. [2024-11-28 02:43:54,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-11-28 02:43:54,775 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 3.4363636363636365) internal successors, (189), 55 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2024-11-28 02:43:54,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:43:54,778 INFO L225 Difference]: With dead ends: 2037 [2024-11-28 02:43:54,778 INFO L226 Difference]: Without dead ends: 1881 [2024-11-28 02:43:54,779 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1313 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=267, Invalid=4155, Unknown=0, NotChecked=0, Total=4422 [2024-11-28 02:43:54,779 INFO L435 NwaCegarLoop]: 53 mSDtfsCounter, 43 mSDsluCounter, 1569 mSDsCounter, 0 mSdLazyCounter, 2174 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 1622 SdHoareTripleChecker+Invalid, 2179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 2174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:43:54,779 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 1622 Invalid, 2179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 2174 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-28 02:43:54,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1881 states. [2024-11-28 02:43:54,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1881 to 1695. [2024-11-28 02:43:54,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1695 states, 1691 states have (on average 1.0928444707273803) internal successors, (1848), 1694 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:43:54,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1695 states to 1695 states and 1848 transitions. [2024-11-28 02:43:54,796 INFO L78 Accepts]: Start accepts. Automaton has 1695 states and 1848 transitions. Word has length 89 [2024-11-28 02:43:54,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:43:54,797 INFO L471 AbstractCegarLoop]: Abstraction has 1695 states and 1848 transitions. [2024-11-28 02:43:54,797 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 3.4363636363636365) internal successors, (189), 55 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:43:54,797 INFO L276 IsEmpty]: Start isEmpty. Operand 1695 states and 1848 transitions. [2024-11-28 02:43:54,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-11-28 02:43:54,799 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:43:54,799 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:43:54,813 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2024-11-28 02:43:55,000 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2024-11-28 02:43:55,000 INFO L396 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:43:55,000 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:43:55,000 INFO L85 PathProgramCache]: Analyzing trace with hash 772757596, now seen corresponding path program 9 times [2024-11-28 02:43:55,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:43:55,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62861174] [2024-11-28 02:43:55,001 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:43:55,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:43:55,089 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-11-28 02:43:55,090 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:43:56,356 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 48 proven. 133 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-28 02:43:56,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:43:56,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62861174] [2024-11-28 02:43:56,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62861174] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:43:56,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882705057] [2024-11-28 02:43:56,357 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:43:56,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:43:56,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:43:56,359 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:43:56,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2024-11-28 02:43:56,939 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-11-28 02:43:56,940 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:43:56,944 INFO L256 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 122 conjuncts are in the unsatisfiable core [2024-11-28 02:43:56,948 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:43:57,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:43:57,032 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 13 treesize of output 7 [2024-11-28 02:43:57,038 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 10 treesize of output 8 [2024-11-28 02:43:58,988 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 183 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:43:58,988 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:44:01,800 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 02:44:01,969 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 183 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:44:01,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882705057] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:44:01,970 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:44:01,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 27, 28] total 77 [2024-11-28 02:44:01,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278359099] [2024-11-28 02:44:01,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:44:01,970 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2024-11-28 02:44:01,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:44:01,971 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2024-11-28 02:44:01,971 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=659, Invalid=5347, Unknown=0, NotChecked=0, Total=6006 [2024-11-28 02:44:01,971 INFO L87 Difference]: Start difference. First operand 1695 states and 1848 transitions. Second operand has 78 states, 77 states have (on average 3.311688311688312) internal successors, (255), 78 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:44:12,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:44:12,971 INFO L93 Difference]: Finished difference Result 2277 states and 2431 transitions. [2024-11-28 02:44:12,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2024-11-28 02:44:12,971 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 77 states have (on average 3.311688311688312) internal successors, (255), 78 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2024-11-28 02:44:12,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:44:12,975 INFO L225 Difference]: With dead ends: 2277 [2024-11-28 02:44:12,975 INFO L226 Difference]: Without dead ends: 2013 [2024-11-28 02:44:12,976 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7891 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=3396, Invalid=20474, Unknown=0, NotChecked=0, Total=23870 [2024-11-28 02:44:12,977 INFO L435 NwaCegarLoop]: 90 mSDtfsCounter, 701 mSDsluCounter, 2782 mSDsCounter, 0 mSdLazyCounter, 4236 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 701 SdHoareTripleChecker+Valid, 2872 SdHoareTripleChecker+Invalid, 4373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 4236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2024-11-28 02:44:12,977 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [701 Valid, 2872 Invalid, 4373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 4236 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2024-11-28 02:44:12,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2013 states. [2024-11-28 02:44:12,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2013 to 1474. [2024-11-28 02:44:12,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1474 states, 1470 states have (on average 1.0938775510204082) internal successors, (1608), 1473 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:44:12,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1474 states to 1474 states and 1608 transitions. [2024-11-28 02:44:12,996 INFO L78 Accepts]: Start accepts. Automaton has 1474 states and 1608 transitions. Word has length 90 [2024-11-28 02:44:12,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:44:12,996 INFO L471 AbstractCegarLoop]: Abstraction has 1474 states and 1608 transitions. [2024-11-28 02:44:12,996 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 77 states have (on average 3.311688311688312) internal successors, (255), 78 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:44:12,997 INFO L276 IsEmpty]: Start isEmpty. Operand 1474 states and 1608 transitions. [2024-11-28 02:44:12,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2024-11-28 02:44:12,998 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:44:12,998 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:44:13,013 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2024-11-28 02:44:13,199 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2024-11-28 02:44:13,199 INFO L396 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:44:13,200 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:44:13,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1270731622, now seen corresponding path program 10 times [2024-11-28 02:44:13,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:44:13,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122090317] [2024-11-28 02:44:13,200 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:44:13,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:44:13,231 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:44:13,231 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:44:13,695 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 15 proven. 115 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-28 02:44:13,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:44:13,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122090317] [2024-11-28 02:44:13,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122090317] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:44:13,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112600997] [2024-11-28 02:44:13,695 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:44:13,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:44:13,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:44:13,697 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:44:13,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2024-11-28 02:44:14,200 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:44:14,200 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:44:14,203 INFO L256 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 58 conjuncts are in the unsatisfiable core [2024-11-28 02:44:14,205 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:44:14,393 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 28 proven. 102 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-28 02:44:14,393 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:44:14,776 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 5 treesize of output 3 [2024-11-28 02:44:14,852 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 28 proven. 102 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-28 02:44:14,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112600997] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:44:14,852 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:44:14,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 27 [2024-11-28 02:44:14,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965370727] [2024-11-28 02:44:14,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:44:14,852 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-28 02:44:14,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:44:14,853 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-28 02:44:14,853 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2024-11-28 02:44:14,853 INFO L87 Difference]: Start difference. First operand 1474 states and 1608 transitions. Second operand has 28 states, 27 states have (on average 4.666666666666667) internal successors, (126), 28 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:44:15,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:44:15,509 INFO L93 Difference]: Finished difference Result 1581 states and 1714 transitions. [2024-11-28 02:44:15,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-28 02:44:15,510 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 4.666666666666667) internal successors, (126), 28 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2024-11-28 02:44:15,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:44:15,512 INFO L225 Difference]: With dead ends: 1581 [2024-11-28 02:44:15,512 INFO L226 Difference]: Without dead ends: 1581 [2024-11-28 02:44:15,512 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 168 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=125, Invalid=997, Unknown=0, NotChecked=0, Total=1122 [2024-11-28 02:44:15,512 INFO L435 NwaCegarLoop]: 68 mSDtfsCounter, 45 mSDsluCounter, 855 mSDsCounter, 0 mSdLazyCounter, 942 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 923 SdHoareTripleChecker+Invalid, 942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-28 02:44:15,513 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 923 Invalid, 942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 942 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-28 02:44:15,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1581 states. [2024-11-28 02:44:15,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1581 to 1495. [2024-11-28 02:44:15,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1495 states, 1491 states have (on average 1.0945674044265594) internal successors, (1632), 1494 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:44:15,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1495 states to 1495 states and 1632 transitions. [2024-11-28 02:44:15,525 INFO L78 Accepts]: Start accepts. Automaton has 1495 states and 1632 transitions. Word has length 93 [2024-11-28 02:44:15,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:44:15,525 INFO L471 AbstractCegarLoop]: Abstraction has 1495 states and 1632 transitions. [2024-11-28 02:44:15,525 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 4.666666666666667) internal successors, (126), 28 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:44:15,525 INFO L276 IsEmpty]: Start isEmpty. Operand 1495 states and 1632 transitions. [2024-11-28 02:44:15,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2024-11-28 02:44:15,527 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:44:15,527 INFO L218 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:44:15,540 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2024-11-28 02:44:15,727 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2024-11-28 02:44:15,728 INFO L396 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:44:15,728 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:44:15,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1774079656, now seen corresponding path program 9 times [2024-11-28 02:44:15,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:44:15,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592055927] [2024-11-28 02:44:15,729 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:44:15,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:44:15,795 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-11-28 02:44:15,795 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:44:18,381 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 91 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:44:18,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:44:18,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592055927] [2024-11-28 02:44:18,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592055927] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:44:18,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922940238] [2024-11-28 02:44:18,381 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:44:18,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:44:18,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:44:18,383 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:44:18,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2024-11-28 02:44:18,938 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-11-28 02:44:18,938 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:44:18,942 INFO L256 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 133 conjuncts are in the unsatisfiable core [2024-11-28 02:44:18,949 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:44:18,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:44:18,958 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 13 treesize of output 7 [2024-11-28 02:44:18,966 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 10 treesize of output 8 [2024-11-28 02:44:21,090 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 0 proven. 282 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:44:21,091 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:44:23,982 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 0 proven. 282 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:44:23,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922940238] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:44:23,983 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:44:23,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 27, 27] total 83 [2024-11-28 02:44:23,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426138568] [2024-11-28 02:44:23,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:44:23,983 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2024-11-28 02:44:23,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:44:23,984 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2024-11-28 02:44:23,984 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=581, Invalid=6391, Unknown=0, NotChecked=0, Total=6972 [2024-11-28 02:44:23,985 INFO L87 Difference]: Start difference. First operand 1495 states and 1632 transitions. Second operand has 84 states, 83 states have (on average 3.289156626506024) internal successors, (273), 84 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:44:46,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:44:46,013 INFO L93 Difference]: Finished difference Result 2382 states and 2588 transitions. [2024-11-28 02:44:46,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2024-11-28 02:44:46,013 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 83 states have (on average 3.289156626506024) internal successors, (273), 84 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2024-11-28 02:44:46,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:44:46,018 INFO L225 Difference]: With dead ends: 2382 [2024-11-28 02:44:46,018 INFO L226 Difference]: Without dead ends: 2334 [2024-11-28 02:44:46,021 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12220 ImplicationChecksByTransitivity, 21.9s TimeCoverageRelationStatistics Valid=3620, Invalid=42390, Unknown=0, NotChecked=0, Total=46010 [2024-11-28 02:44:46,022 INFO L435 NwaCegarLoop]: 107 mSDtfsCounter, 959 mSDsluCounter, 3711 mSDsCounter, 0 mSdLazyCounter, 6200 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 959 SdHoareTripleChecker+Valid, 3818 SdHoareTripleChecker+Invalid, 6411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 6200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2024-11-28 02:44:46,022 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [959 Valid, 3818 Invalid, 6411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 6200 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2024-11-28 02:44:46,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2334 states. [2024-11-28 02:44:46,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2334 to 1462. [2024-11-28 02:44:46,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1462 states, 1458 states have (on average 1.0946502057613168) internal successors, (1596), 1461 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:44:46,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1462 states to 1462 states and 1596 transitions. [2024-11-28 02:44:46,043 INFO L78 Accepts]: Start accepts. Automaton has 1462 states and 1596 transitions. Word has length 93 [2024-11-28 02:44:46,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:44:46,043 INFO L471 AbstractCegarLoop]: Abstraction has 1462 states and 1596 transitions. [2024-11-28 02:44:46,043 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 83 states have (on average 3.289156626506024) internal successors, (273), 84 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:44:46,044 INFO L276 IsEmpty]: Start isEmpty. Operand 1462 states and 1596 transitions. [2024-11-28 02:44:46,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2024-11-28 02:44:46,045 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:44:46,045 INFO L218 NwaCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:44:46,060 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2024-11-28 02:44:46,246 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2024-11-28 02:44:46,246 INFO L396 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:44:46,247 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:44:46,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1041959385, now seen corresponding path program 13 times [2024-11-28 02:44:46,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:44:46,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328713751] [2024-11-28 02:44:46,247 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 02:44:46,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:44:46,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:44:47,926 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 153 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:44:47,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:44:47,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328713751] [2024-11-28 02:44:47,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328713751] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:44:47,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627011485] [2024-11-28 02:44:47,927 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 02:44:47,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:44:47,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:44:47,928 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:44:47,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2024-11-28 02:44:48,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:44:48,313 INFO L256 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 130 conjuncts are in the unsatisfiable core [2024-11-28 02:44:48,317 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:44:48,917 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 02:44:49,736 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 23 proven. 418 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:44:49,736 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:44:49,809 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 18 treesize of output 16 [2024-11-28 02:44:49,812 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2024-11-28 02:44:50,030 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 23 proven. 418 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:44:50,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627011485] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:44:50,030 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:44:50,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 30, 30] total 59 [2024-11-28 02:44:50,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125396509] [2024-11-28 02:44:50,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:44:50,031 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2024-11-28 02:44:50,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:44:50,032 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2024-11-28 02:44:50,032 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=3253, Unknown=0, NotChecked=0, Total=3422 [2024-11-28 02:44:50,032 INFO L87 Difference]: Start difference. First operand 1462 states and 1596 transitions. Second operand has 59 states, 59 states have (on average 3.2033898305084745) internal successors, (189), 59 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:44:56,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:44:56,569 INFO L93 Difference]: Finished difference Result 2415 states and 2578 transitions. [2024-11-28 02:44:56,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2024-11-28 02:44:56,569 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 3.2033898305084745) internal successors, (189), 59 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2024-11-28 02:44:56,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:44:56,573 INFO L225 Difference]: With dead ends: 2415 [2024-11-28 02:44:56,573 INFO L226 Difference]: Without dead ends: 2273 [2024-11-28 02:44:56,573 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2192 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=576, Invalid=11634, Unknown=0, NotChecked=0, Total=12210 [2024-11-28 02:44:56,574 INFO L435 NwaCegarLoop]: 145 mSDtfsCounter, 264 mSDsluCounter, 5976 mSDsCounter, 0 mSdLazyCounter, 5559 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 6121 SdHoareTripleChecker+Invalid, 5606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 5559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2024-11-28 02:44:56,574 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 6121 Invalid, 5606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 5559 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2024-11-28 02:44:56,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2273 states. [2024-11-28 02:44:56,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2273 to 1753. [2024-11-28 02:44:56,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1753 states, 1749 states have (on average 1.0926243567753002) internal successors, (1911), 1752 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:44:56,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1753 states to 1753 states and 1911 transitions. [2024-11-28 02:44:56,591 INFO L78 Accepts]: Start accepts. Automaton has 1753 states and 1911 transitions. Word has length 94 [2024-11-28 02:44:56,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:44:56,591 INFO L471 AbstractCegarLoop]: Abstraction has 1753 states and 1911 transitions. [2024-11-28 02:44:56,592 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 3.2033898305084745) internal successors, (189), 59 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:44:56,592 INFO L276 IsEmpty]: Start isEmpty. Operand 1753 states and 1911 transitions. [2024-11-28 02:44:56,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2024-11-28 02:44:56,594 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:44:56,594 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:44:56,602 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2024-11-28 02:44:56,794 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2024-11-28 02:44:56,794 INFO L396 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:44:56,795 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:44:56,795 INFO L85 PathProgramCache]: Analyzing trace with hash -5295423, now seen corresponding path program 10 times [2024-11-28 02:44:56,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:44:56,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130652693] [2024-11-28 02:44:56,795 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:44:56,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:44:56,865 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:44:56,865 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:44:59,060 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 64 proven. 106 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:44:59,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:44:59,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130652693] [2024-11-28 02:44:59,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130652693] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:44:59,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306558330] [2024-11-28 02:44:59,060 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:44:59,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:44:59,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:44:59,062 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:44:59,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2024-11-28 02:44:59,609 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:44:59,609 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:44:59,613 INFO L256 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 114 conjuncts are in the unsatisfiable core [2024-11-28 02:44:59,618 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:44:59,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:44:59,704 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 13 treesize of output 7 [2024-11-28 02:44:59,710 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 10 treesize of output 8 [2024-11-28 02:45:02,754 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 45 proven. 111 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 02:45:02,754 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:45:06,066 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 02:45:06,273 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 66 proven. 90 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 02:45:06,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306558330] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:45:06,273 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:45:06,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 26, 27] total 81 [2024-11-28 02:45:06,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305622594] [2024-11-28 02:45:06,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:45:06,274 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2024-11-28 02:45:06,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:45:06,275 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2024-11-28 02:45:06,275 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=710, Invalid=5932, Unknown=0, NotChecked=0, Total=6642 [2024-11-28 02:45:06,276 INFO L87 Difference]: Start difference. First operand 1753 states and 1911 transitions. Second operand has 82 states, 81 states have (on average 3.259259259259259) internal successors, (264), 82 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:45:11,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:45:11,767 INFO L93 Difference]: Finished difference Result 2097 states and 2256 transitions. [2024-11-28 02:45:11,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2024-11-28 02:45:11,768 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 81 states have (on average 3.259259259259259) internal successors, (264), 82 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2024-11-28 02:45:11,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:45:11,771 INFO L225 Difference]: With dead ends: 2097 [2024-11-28 02:45:11,771 INFO L226 Difference]: Without dead ends: 1992 [2024-11-28 02:45:11,772 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 137 SyntacticMatches, 1 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4380 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=1582, Invalid=12460, Unknown=0, NotChecked=0, Total=14042 [2024-11-28 02:45:11,773 INFO L435 NwaCegarLoop]: 75 mSDtfsCounter, 305 mSDsluCounter, 2042 mSDsCounter, 0 mSdLazyCounter, 3437 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 2117 SdHoareTripleChecker+Invalid, 3502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 3437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2024-11-28 02:45:11,773 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 2117 Invalid, 3502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 3437 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2024-11-28 02:45:11,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1992 states. [2024-11-28 02:45:11,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1992 to 1653. [2024-11-28 02:45:11,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1653 states, 1649 states have (on average 1.0909642207398422) internal successors, (1799), 1652 states have internal predecessors, (1799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:45:11,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1653 states to 1653 states and 1799 transitions. [2024-11-28 02:45:11,792 INFO L78 Accepts]: Start accepts. Automaton has 1653 states and 1799 transitions. Word has length 94 [2024-11-28 02:45:11,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:45:11,793 INFO L471 AbstractCegarLoop]: Abstraction has 1653 states and 1799 transitions. [2024-11-28 02:45:11,793 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 81 states have (on average 3.259259259259259) internal successors, (264), 82 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:45:11,793 INFO L276 IsEmpty]: Start isEmpty. Operand 1653 states and 1799 transitions. [2024-11-28 02:45:11,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2024-11-28 02:45:11,795 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:45:11,795 INFO L218 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:45:11,811 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2024-11-28 02:45:11,995 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2024-11-28 02:45:11,996 INFO L396 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:45:11,996 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:45:11,996 INFO L85 PathProgramCache]: Analyzing trace with hash -450948098, now seen corresponding path program 7 times [2024-11-28 02:45:11,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:45:11,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951411841] [2024-11-28 02:45:11,996 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 02:45:11,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:45:12,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:45:12,994 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 190 proven. 296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:45:12,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:45:12,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951411841] [2024-11-28 02:45:12,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951411841] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:45:12,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57662668] [2024-11-28 02:45:12,995 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 02:45:12,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:45:12,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:45:12,997 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:45:12,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2024-11-28 02:45:13,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:45:13,414 INFO L256 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 123 conjuncts are in the unsatisfiable core [2024-11-28 02:45:13,420 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:45:14,144 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 231 proven. 255 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:45:14,145 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:45:14,862 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 7 treesize of output 5 [2024-11-28 02:45:15,259 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 231 proven. 255 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:45:15,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57662668] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:45:15,259 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:45:15,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29, 29] total 59 [2024-11-28 02:45:15,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039016650] [2024-11-28 02:45:15,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:45:15,260 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2024-11-28 02:45:15,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:45:15,260 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2024-11-28 02:45:15,261 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=432, Invalid=3108, Unknown=0, NotChecked=0, Total=3540 [2024-11-28 02:45:15,261 INFO L87 Difference]: Start difference. First operand 1653 states and 1799 transitions. Second operand has 60 states, 59 states have (on average 3.3389830508474576) internal successors, (197), 60 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:45:17,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:45:17,111 INFO L93 Difference]: Finished difference Result 2339 states and 2502 transitions. [2024-11-28 02:45:17,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-28 02:45:17,112 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 3.3389830508474576) internal successors, (197), 60 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2024-11-28 02:45:17,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:45:17,115 INFO L225 Difference]: With dead ends: 2339 [2024-11-28 02:45:17,115 INFO L226 Difference]: Without dead ends: 2305 [2024-11-28 02:45:17,115 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 151 SyntacticMatches, 13 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1784 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=459, Invalid=3201, Unknown=0, NotChecked=0, Total=3660 [2024-11-28 02:45:17,115 INFO L435 NwaCegarLoop]: 130 mSDtfsCounter, 389 mSDsluCounter, 2837 mSDsCounter, 0 mSdLazyCounter, 3299 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 2967 SdHoareTripleChecker+Invalid, 3351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 3299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-28 02:45:17,115 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [389 Valid, 2967 Invalid, 3351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 3299 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-28 02:45:17,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2305 states. [2024-11-28 02:45:17,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2305 to 1644. [2024-11-28 02:45:17,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1644 states, 1640 states have (on average 1.0914634146341464) internal successors, (1790), 1643 states have internal predecessors, (1790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:45:17,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1644 states to 1644 states and 1790 transitions. [2024-11-28 02:45:17,130 INFO L78 Accepts]: Start accepts. Automaton has 1644 states and 1790 transitions. Word has length 98 [2024-11-28 02:45:17,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:45:17,131 INFO L471 AbstractCegarLoop]: Abstraction has 1644 states and 1790 transitions. [2024-11-28 02:45:17,131 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 59 states have (on average 3.3389830508474576) internal successors, (197), 60 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:45:17,131 INFO L276 IsEmpty]: Start isEmpty. Operand 1644 states and 1790 transitions. [2024-11-28 02:45:17,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2024-11-28 02:45:17,132 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:45:17,132 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:45:17,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2024-11-28 02:45:17,333 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:45:17,333 INFO L396 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:45:17,333 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:45:17,333 INFO L85 PathProgramCache]: Analyzing trace with hash -690734853, now seen corresponding path program 11 times [2024-11-28 02:45:17,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:45:17,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567901631] [2024-11-28 02:45:17,333 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 02:45:17,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:45:17,378 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-11-28 02:45:17,378 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:45:18,223 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 51 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:45:18,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:45:18,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567901631] [2024-11-28 02:45:18,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567901631] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:45:18,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368606726] [2024-11-28 02:45:18,224 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 02:45:18,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:45:18,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:45:18,226 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:45:18,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2024-11-28 02:45:19,548 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-11-28 02:45:19,548 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:45:19,554 INFO L256 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 81 conjuncts are in the unsatisfiable core [2024-11-28 02:45:19,556 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:45:19,762 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 02:45:19,875 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 7 treesize of output 3 [2024-11-28 02:45:19,880 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 23 proven. 145 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-28 02:45:19,880 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:45:19,964 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 13 [2024-11-28 02:45:19,978 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 16 treesize of output 12 [2024-11-28 02:45:20,085 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 23 proven. 145 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-28 02:45:20,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368606726] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:45:20,085 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:45:20,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 20, 20] total 36 [2024-11-28 02:45:20,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050125997] [2024-11-28 02:45:20,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:45:20,086 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-28 02:45:20,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:45:20,087 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-28 02:45:20,087 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1150, Unknown=0, NotChecked=0, Total=1260 [2024-11-28 02:45:20,087 INFO L87 Difference]: Start difference. First operand 1644 states and 1790 transitions. Second operand has 36 states, 36 states have (on average 3.8055555555555554) internal successors, (137), 36 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:45:21,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:45:21,285 INFO L93 Difference]: Finished difference Result 2215 states and 2432 transitions. [2024-11-28 02:45:21,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2024-11-28 02:45:21,285 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.8055555555555554) internal successors, (137), 36 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2024-11-28 02:45:21,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:45:21,288 INFO L225 Difference]: With dead ends: 2215 [2024-11-28 02:45:21,289 INFO L226 Difference]: Without dead ends: 2115 [2024-11-28 02:45:21,289 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 771 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=301, Invalid=3481, Unknown=0, NotChecked=0, Total=3782 [2024-11-28 02:45:21,290 INFO L435 NwaCegarLoop]: 67 mSDtfsCounter, 82 mSDsluCounter, 1404 mSDsCounter, 0 mSdLazyCounter, 1286 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 1471 SdHoareTripleChecker+Invalid, 1305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-28 02:45:21,290 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 1471 Invalid, 1305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1286 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-28 02:45:21,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2115 states. [2024-11-28 02:45:21,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2115 to 1908. [2024-11-28 02:45:21,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1908 states, 1904 states have (on average 1.088235294117647) internal successors, (2072), 1907 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:45:21,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1908 states to 1908 states and 2072 transitions. [2024-11-28 02:45:21,312 INFO L78 Accepts]: Start accepts. Automaton has 1908 states and 2072 transitions. Word has length 100 [2024-11-28 02:45:21,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:45:21,312 INFO L471 AbstractCegarLoop]: Abstraction has 1908 states and 2072 transitions. [2024-11-28 02:45:21,313 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.8055555555555554) internal successors, (137), 36 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:45:21,313 INFO L276 IsEmpty]: Start isEmpty. Operand 1908 states and 2072 transitions. [2024-11-28 02:45:21,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2024-11-28 02:45:21,315 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:45:21,315 INFO L218 NwaCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:45:21,330 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2024-11-28 02:45:21,515 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:45:21,516 INFO L396 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:45:21,516 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:45:21,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1138139736, now seen corresponding path program 14 times [2024-11-28 02:45:21,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:45:21,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839153290] [2024-11-28 02:45:21,516 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:45:21,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:45:21,551 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:45:21,551 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:45:23,313 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 190 proven. 333 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:45:23,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:45:23,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839153290] [2024-11-28 02:45:23,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839153290] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:45:23,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899245332] [2024-11-28 02:45:23,314 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:45:23,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:45:23,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:45:23,316 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:45:23,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2024-11-28 02:45:23,768 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:45:23,768 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:45:23,772 INFO L256 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 140 conjuncts are in the unsatisfiable core [2024-11-28 02:45:23,777 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:45:24,445 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 02:45:25,373 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 25 proven. 498 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:45:25,374 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:45:25,446 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 18 treesize of output 16 [2024-11-28 02:45:25,448 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2024-11-28 02:45:25,674 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 25 proven. 498 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:45:25,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899245332] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:45:25,674 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:45:25,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 32, 32] total 63 [2024-11-28 02:45:25,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444353948] [2024-11-28 02:45:25,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:45:25,675 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2024-11-28 02:45:25,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:45:25,675 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2024-11-28 02:45:25,676 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=3719, Unknown=0, NotChecked=0, Total=3906 [2024-11-28 02:45:25,676 INFO L87 Difference]: Start difference. First operand 1908 states and 2072 transitions. Second operand has 63 states, 63 states have (on average 3.2222222222222223) internal successors, (203), 63 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:45:32,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:45:32,317 INFO L93 Difference]: Finished difference Result 3016 states and 3215 transitions. [2024-11-28 02:45:32,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2024-11-28 02:45:32,317 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 3.2222222222222223) internal successors, (203), 63 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2024-11-28 02:45:32,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:45:32,319 INFO L225 Difference]: With dead ends: 3016 [2024-11-28 02:45:32,319 INFO L226 Difference]: Without dead ends: 2865 [2024-11-28 02:45:32,320 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2612 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=638, Invalid=13404, Unknown=0, NotChecked=0, Total=14042 [2024-11-28 02:45:32,320 INFO L435 NwaCegarLoop]: 156 mSDtfsCounter, 267 mSDsluCounter, 6944 mSDsCounter, 0 mSdLazyCounter, 6281 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 7100 SdHoareTripleChecker+Invalid, 6332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 6281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2024-11-28 02:45:32,320 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 7100 Invalid, 6332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 6281 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2024-11-28 02:45:32,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2865 states. [2024-11-28 02:45:32,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2865 to 2100. [2024-11-28 02:45:32,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2100 states, 2096 states have (on average 1.088740458015267) internal successors, (2282), 2099 states have internal predecessors, (2282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:45:32,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2100 states to 2100 states and 2282 transitions. [2024-11-28 02:45:32,354 INFO L78 Accepts]: Start accepts. Automaton has 2100 states and 2282 transitions. Word has length 101 [2024-11-28 02:45:32,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:45:32,354 INFO L471 AbstractCegarLoop]: Abstraction has 2100 states and 2282 transitions. [2024-11-28 02:45:32,354 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 3.2222222222222223) internal successors, (203), 63 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:45:32,354 INFO L276 IsEmpty]: Start isEmpty. Operand 2100 states and 2282 transitions. [2024-11-28 02:45:32,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-11-28 02:45:32,356 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:45:32,356 INFO L218 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:45:32,366 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2024-11-28 02:45:32,556 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:45:32,556 INFO L396 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:45:32,557 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:45:32,557 INFO L85 PathProgramCache]: Analyzing trace with hash 673651178, now seen corresponding path program 11 times [2024-11-28 02:45:32,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:45:32,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272436493] [2024-11-28 02:45:32,557 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 02:45:32,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:45:32,611 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2024-11-28 02:45:32,611 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:45:34,650 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 104 proven. 190 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:45:34,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:45:34,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272436493] [2024-11-28 02:45:34,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272436493] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:45:34,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851721385] [2024-11-28 02:45:34,650 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 02:45:34,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:45:34,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:45:34,652 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:45:34,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2024-11-28 02:45:35,143 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2024-11-28 02:45:35,143 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:45:35,148 INFO L256 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 131 conjuncts are in the unsatisfiable core [2024-11-28 02:45:35,154 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:45:35,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:45:35,253 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 13 treesize of output 7 [2024-11-28 02:45:35,260 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 10 treesize of output 8 [2024-11-28 02:45:38,926 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 120 proven. 174 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:45:38,926 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:45:42,710 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 02:45:42,921 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 153 proven. 141 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:45:42,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851721385] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:45:42,921 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:45:42,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 29, 30] total 89 [2024-11-28 02:45:42,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761683159] [2024-11-28 02:45:42,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:45:42,922 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2024-11-28 02:45:42,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:45:42,923 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2024-11-28 02:45:42,923 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=806, Invalid=7204, Unknown=0, NotChecked=0, Total=8010 [2024-11-28 02:45:42,923 INFO L87 Difference]: Start difference. First operand 2100 states and 2282 transitions. Second operand has 90 states, 89 states have (on average 3.348314606741573) internal successors, (298), 90 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:45:49,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:45:49,523 INFO L93 Difference]: Finished difference Result 2914 states and 3111 transitions. [2024-11-28 02:45:49,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2024-11-28 02:45:49,524 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 89 states have (on average 3.348314606741573) internal successors, (298), 90 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2024-11-28 02:45:49,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:45:49,525 INFO L225 Difference]: With dead ends: 2914 [2024-11-28 02:45:49,526 INFO L226 Difference]: Without dead ends: 2650 [2024-11-28 02:45:49,526 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 149 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4404 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=1592, Invalid=13170, Unknown=0, NotChecked=0, Total=14762 [2024-11-28 02:45:49,527 INFO L435 NwaCegarLoop]: 105 mSDtfsCounter, 431 mSDsluCounter, 3173 mSDsCounter, 0 mSdLazyCounter, 4715 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 3278 SdHoareTripleChecker+Invalid, 4803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 4715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2024-11-28 02:45:49,527 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [431 Valid, 3278 Invalid, 4803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 4715 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2024-11-28 02:45:49,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2650 states. [2024-11-28 02:45:49,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2650 to 2168. [2024-11-28 02:45:49,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2168 states, 2164 states have (on average 1.0850277264325323) internal successors, (2348), 2167 states have internal predecessors, (2348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:45:49,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2168 states to 2168 states and 2348 transitions. [2024-11-28 02:45:49,545 INFO L78 Accepts]: Start accepts. Automaton has 2168 states and 2348 transitions. Word has length 104 [2024-11-28 02:45:49,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:45:49,545 INFO L471 AbstractCegarLoop]: Abstraction has 2168 states and 2348 transitions. [2024-11-28 02:45:49,545 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 89 states have (on average 3.348314606741573) internal successors, (298), 90 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:45:49,545 INFO L276 IsEmpty]: Start isEmpty. Operand 2168 states and 2348 transitions. [2024-11-28 02:45:49,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2024-11-28 02:45:49,547 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:45:49,547 INFO L218 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:45:49,560 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2024-11-28 02:45:49,747 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:45:49,747 INFO L396 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:45:49,748 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:45:49,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1208905757, now seen corresponding path program 8 times [2024-11-28 02:45:49,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:45:49,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535643888] [2024-11-28 02:45:49,748 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:45:49,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:45:49,779 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:45:49,779 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:45:51,801 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 231 proven. 341 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:45:51,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:45:51,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535643888] [2024-11-28 02:45:51,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535643888] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:45:51,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332930105] [2024-11-28 02:45:51,802 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:45:51,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:45:51,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:45:51,804 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:45:51,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2024-11-28 02:45:52,268 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:45:52,269 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:45:52,272 INFO L256 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 136 conjuncts are in the unsatisfiable core [2024-11-28 02:45:52,278 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:45:54,008 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 276 proven. 296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:45:54,008 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:45:55,094 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 23 treesize of output 19 [2024-11-28 02:45:56,339 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 276 proven. 296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:45:56,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332930105] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:45:56,339 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:45:56,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 30, 30] total 91 [2024-11-28 02:45:56,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178813762] [2024-11-28 02:45:56,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:45:56,340 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2024-11-28 02:45:56,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:45:56,341 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2024-11-28 02:45:56,342 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=767, Invalid=7605, Unknown=0, NotChecked=0, Total=8372 [2024-11-28 02:45:56,342 INFO L87 Difference]: Start difference. First operand 2168 states and 2348 transitions. Second operand has 92 states, 91 states have (on average 3.3956043956043955) internal successors, (309), 92 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:46:00,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:46:00,893 INFO L93 Difference]: Finished difference Result 3110 states and 3326 transitions. [2024-11-28 02:46:00,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-28 02:46:00,893 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 91 states have (on average 3.3956043956043955) internal successors, (309), 92 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2024-11-28 02:46:00,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:46:00,895 INFO L225 Difference]: With dead ends: 3110 [2024-11-28 02:46:00,895 INFO L226 Difference]: Without dead ends: 3022 [2024-11-28 02:46:00,896 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2800 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=1204, Invalid=9926, Unknown=0, NotChecked=0, Total=11130 [2024-11-28 02:46:00,897 INFO L435 NwaCegarLoop]: 131 mSDtfsCounter, 472 mSDsluCounter, 4023 mSDsCounter, 0 mSdLazyCounter, 4775 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 4154 SdHoareTripleChecker+Invalid, 4836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 4775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2024-11-28 02:46:00,897 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [472 Valid, 4154 Invalid, 4836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 4775 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2024-11-28 02:46:00,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3022 states. [2024-11-28 02:46:00,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3022 to 2196. [2024-11-28 02:46:00,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2196 states, 2192 states have (on average 1.0857664233576643) internal successors, (2380), 2195 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:46:00,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2196 states to 2196 states and 2380 transitions. [2024-11-28 02:46:00,923 INFO L78 Accepts]: Start accepts. Automaton has 2196 states and 2380 transitions. Word has length 105 [2024-11-28 02:46:00,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:46:00,923 INFO L471 AbstractCegarLoop]: Abstraction has 2196 states and 2380 transitions. [2024-11-28 02:46:00,923 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 91 states have (on average 3.3956043956043955) internal successors, (309), 92 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:46:00,923 INFO L276 IsEmpty]: Start isEmpty. Operand 2196 states and 2380 transitions. [2024-11-28 02:46:00,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2024-11-28 02:46:00,926 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:46:00,926 INFO L218 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:46:00,948 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2024-11-28 02:46:01,126 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2024-11-28 02:46:01,127 INFO L396 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:46:01,127 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:46:01,128 INFO L85 PathProgramCache]: Analyzing trace with hash -209363382, now seen corresponding path program 10 times [2024-11-28 02:46:01,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:46:01,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083350007] [2024-11-28 02:46:01,128 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:46:01,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:46:01,258 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:46:01,258 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:46:03,881 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 0 proven. 421 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:46:03,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:46:03,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083350007] [2024-11-28 02:46:03,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083350007] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:46:03,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377072396] [2024-11-28 02:46:03,881 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:46:03,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:46:03,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:46:03,883 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:46:03,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2024-11-28 02:46:04,830 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:46:04,830 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:46:04,834 INFO L256 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 148 conjuncts are in the unsatisfiable core [2024-11-28 02:46:04,839 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:46:04,904 INFO L349 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2024-11-28 02:46:04,904 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 1 case distinctions, treesize of input 13 treesize of output 11 [2024-11-28 02:46:04,918 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 10 treesize of output 8 [2024-11-28 02:46:08,808 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 190 proven. 231 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:46:08,809 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:46:13,360 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 231 proven. 190 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:46:13,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377072396] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:46:13,360 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:46:13,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 31, 29] total 94 [2024-11-28 02:46:13,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957165444] [2024-11-28 02:46:13,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:46:13,361 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2024-11-28 02:46:13,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:46:13,363 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2024-11-28 02:46:13,363 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=723, Invalid=8207, Unknown=0, NotChecked=0, Total=8930 [2024-11-28 02:46:13,364 INFO L87 Difference]: Start difference. First operand 2196 states and 2380 transitions. Second operand has 95 states, 94 states have (on average 3.3297872340425534) internal successors, (313), 95 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:46:25,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:46:25,297 INFO L93 Difference]: Finished difference Result 3017 states and 3228 transitions. [2024-11-28 02:46:25,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2024-11-28 02:46:25,298 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 94 states have (on average 3.3297872340425534) internal successors, (313), 95 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2024-11-28 02:46:25,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:46:25,300 INFO L225 Difference]: With dead ends: 3017 [2024-11-28 02:46:25,300 INFO L226 Difference]: Without dead ends: 2995 [2024-11-28 02:46:25,301 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4651 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=1642, Invalid=19238, Unknown=0, NotChecked=0, Total=20880 [2024-11-28 02:46:25,301 INFO L435 NwaCegarLoop]: 123 mSDtfsCounter, 1008 mSDsluCounter, 4317 mSDsCounter, 0 mSdLazyCounter, 7977 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1008 SdHoareTripleChecker+Valid, 4440 SdHoareTripleChecker+Invalid, 8165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 7977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2024-11-28 02:46:25,302 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1008 Valid, 4440 Invalid, 8165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 7977 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2024-11-28 02:46:25,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2995 states. [2024-11-28 02:46:25,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2995 to 2362. [2024-11-28 02:46:25,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2362 states, 2358 states have (on average 1.0826972010178118) internal successors, (2553), 2361 states have internal predecessors, (2553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:46:25,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2362 states to 2362 states and 2553 transitions. [2024-11-28 02:46:25,326 INFO L78 Accepts]: Start accepts. Automaton has 2362 states and 2553 transitions. Word has length 107 [2024-11-28 02:46:25,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:46:25,327 INFO L471 AbstractCegarLoop]: Abstraction has 2362 states and 2553 transitions. [2024-11-28 02:46:25,327 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 94 states have (on average 3.3297872340425534) internal successors, (313), 95 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:46:25,327 INFO L276 IsEmpty]: Start isEmpty. Operand 2362 states and 2553 transitions. [2024-11-28 02:46:25,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2024-11-28 02:46:25,329 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:46:25,329 INFO L218 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:46:25,339 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2024-11-28 02:46:25,529 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:46:25,530 INFO L396 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:46:25,530 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:46:25,530 INFO L85 PathProgramCache]: Analyzing trace with hash -209372482, now seen corresponding path program 12 times [2024-11-28 02:46:25,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:46:25,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827886470] [2024-11-28 02:46:25,530 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 02:46:25,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:46:25,582 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2024-11-28 02:46:25,582 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:46:27,628 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 153 proven. 269 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:46:27,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:46:27,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827886470] [2024-11-28 02:46:27,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827886470] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:46:27,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706071261] [2024-11-28 02:46:27,628 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 02:46:27,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:46:27,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:46:27,630 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:46:27,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2024-11-28 02:46:28,548 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2024-11-28 02:46:28,549 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:46:28,555 INFO L256 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 142 conjuncts are in the unsatisfiable core [2024-11-28 02:46:28,561 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:46:28,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:46:28,656 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 13 treesize of output 7 [2024-11-28 02:46:28,663 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 10 treesize of output 8 [2024-11-28 02:46:31,579 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 190 proven. 232 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:46:31,580 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:46:34,876 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 02:46:35,049 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 231 proven. 191 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:46:35,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706071261] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:46:35,049 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:46:35,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 32] total 92 [2024-11-28 02:46:35,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148311661] [2024-11-28 02:46:35,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:46:35,050 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2024-11-28 02:46:35,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:46:35,051 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2024-11-28 02:46:35,051 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1220, Invalid=7336, Unknown=0, NotChecked=0, Total=8556 [2024-11-28 02:46:35,051 INFO L87 Difference]: Start difference. First operand 2362 states and 2553 transitions. Second operand has 93 states, 92 states have (on average 3.467391304347826) internal successors, (319), 93 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:46:40,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:46:40,065 INFO L93 Difference]: Finished difference Result 2987 states and 3172 transitions. [2024-11-28 02:46:40,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2024-11-28 02:46:40,065 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 92 states have (on average 3.467391304347826) internal successors, (319), 93 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2024-11-28 02:46:40,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:46:40,067 INFO L225 Difference]: With dead ends: 2987 [2024-11-28 02:46:40,067 INFO L226 Difference]: Without dead ends: 2867 [2024-11-28 02:46:40,068 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6482 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=2499, Invalid=15323, Unknown=0, NotChecked=0, Total=17822 [2024-11-28 02:46:40,068 INFO L435 NwaCegarLoop]: 117 mSDtfsCounter, 426 mSDsluCounter, 2316 mSDsCounter, 0 mSdLazyCounter, 3371 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 2433 SdHoareTripleChecker+Invalid, 3447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 3371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2024-11-28 02:46:40,069 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [426 Valid, 2433 Invalid, 3447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 3371 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2024-11-28 02:46:40,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2867 states. [2024-11-28 02:46:40,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2867 to 2174. [2024-11-28 02:46:40,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2174 states, 2170 states have (on average 1.0857142857142856) internal successors, (2356), 2173 states have internal predecessors, (2356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:46:40,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2174 states to 2174 states and 2356 transitions. [2024-11-28 02:46:40,088 INFO L78 Accepts]: Start accepts. Automaton has 2174 states and 2356 transitions. Word has length 107 [2024-11-28 02:46:40,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:46:40,089 INFO L471 AbstractCegarLoop]: Abstraction has 2174 states and 2356 transitions. [2024-11-28 02:46:40,089 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 92 states have (on average 3.467391304347826) internal successors, (319), 93 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:46:40,089 INFO L276 IsEmpty]: Start isEmpty. Operand 2174 states and 2356 transitions. [2024-11-28 02:46:40,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2024-11-28 02:46:40,092 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:46:40,092 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:46:40,101 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2024-11-28 02:46:40,292 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:46:40,292 INFO L396 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:46:40,293 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:46:40,293 INFO L85 PathProgramCache]: Analyzing trace with hash -552219127, now seen corresponding path program 12 times [2024-11-28 02:46:40,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:46:40,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117598240] [2024-11-28 02:46:40,293 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 02:46:40,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:46:40,333 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-11-28 02:46:40,334 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:46:41,161 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 28 proven. 161 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-28 02:46:41,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:46:41,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117598240] [2024-11-28 02:46:41,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117598240] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:46:41,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382695200] [2024-11-28 02:46:41,161 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 02:46:41,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:46:41,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:46:41,163 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:46:41,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2024-11-28 02:46:43,086 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-11-28 02:46:43,087 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:46:43,094 INFO L256 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-11-28 02:46:43,097 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:46:43,101 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-28 02:46:43,561 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 45 proven. 144 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-28 02:46:43,561 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:46:44,376 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 45 proven. 144 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-28 02:46:44,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382695200] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:46:44,377 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:46:44,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18, 18] total 48 [2024-11-28 02:46:44,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042832625] [2024-11-28 02:46:44,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:46:44,377 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-28 02:46:44,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:46:44,378 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-28 02:46:44,378 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=2050, Unknown=0, NotChecked=0, Total=2352 [2024-11-28 02:46:44,378 INFO L87 Difference]: Start difference. First operand 2174 states and 2356 transitions. Second operand has 49 states, 48 states have (on average 4.375) internal successors, (210), 49 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:46:45,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:46:45,347 INFO L93 Difference]: Finished difference Result 2291 states and 2469 transitions. [2024-11-28 02:46:45,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-28 02:46:45,347 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 4.375) internal successors, (210), 49 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2024-11-28 02:46:45,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:46:45,349 INFO L225 Difference]: With dead ends: 2291 [2024-11-28 02:46:45,349 INFO L226 Difference]: Without dead ends: 2291 [2024-11-28 02:46:45,349 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 187 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1238 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=509, Invalid=3151, Unknown=0, NotChecked=0, Total=3660 [2024-11-28 02:46:45,349 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 85 mSDsluCounter, 646 mSDsCounter, 0 mSdLazyCounter, 855 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 691 SdHoareTripleChecker+Invalid, 860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-28 02:46:45,349 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 691 Invalid, 860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 855 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-28 02:46:45,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2291 states. [2024-11-28 02:46:45,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2291 to 2188. [2024-11-28 02:46:45,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2188 states, 2184 states have (on average 1.0856227106227105) internal successors, (2371), 2187 states have internal predecessors, (2371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:46:45,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2188 states to 2188 states and 2371 transitions. [2024-11-28 02:46:45,366 INFO L78 Accepts]: Start accepts. Automaton has 2188 states and 2371 transitions. Word has length 108 [2024-11-28 02:46:45,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:46:45,367 INFO L471 AbstractCegarLoop]: Abstraction has 2188 states and 2371 transitions. [2024-11-28 02:46:45,367 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 48 states have (on average 4.375) internal successors, (210), 49 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:46:45,367 INFO L276 IsEmpty]: Start isEmpty. Operand 2188 states and 2371 transitions. [2024-11-28 02:46:45,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2024-11-28 02:46:45,369 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:46:45,369 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:46:45,382 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2024-11-28 02:46:45,569 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:46:45,569 INFO L396 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:46:45,570 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:46:45,570 INFO L85 PathProgramCache]: Analyzing trace with hash -343110321, now seen corresponding path program 13 times [2024-11-28 02:46:45,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:46:45,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686344964] [2024-11-28 02:46:45,570 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 02:46:45,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:46:45,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:46:47,461 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 85 proven. 168 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 02:46:47,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:46:47,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686344964] [2024-11-28 02:46:47,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686344964] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:46:47,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753365796] [2024-11-28 02:46:47,462 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 02:46:47,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:46:47,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:46:47,465 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:46:47,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2024-11-28 02:46:47,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:46:47,954 INFO L256 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 142 conjuncts are in the unsatisfiable core [2024-11-28 02:46:47,959 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:46:48,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:46:48,055 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 13 treesize of output 7 [2024-11-28 02:46:48,062 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 10 treesize of output 8 [2024-11-28 02:46:51,098 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 02:46:51,098 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:46:54,887 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 02:46:55,092 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 02:46:55,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753365796] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:46:55,092 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:46:55,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 32, 33] total 94 [2024-11-28 02:46:55,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114282256] [2024-11-28 02:46:55,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:46:55,093 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2024-11-28 02:46:55,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:46:55,093 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2024-11-28 02:46:55,094 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=786, Invalid=8144, Unknown=0, NotChecked=0, Total=8930 [2024-11-28 02:46:55,094 INFO L87 Difference]: Start difference. First operand 2188 states and 2371 transitions. Second operand has 95 states, 94 states have (on average 3.1702127659574466) internal successors, (298), 95 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:47:05,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:47:05,386 INFO L93 Difference]: Finished difference Result 2928 states and 3122 transitions. [2024-11-28 02:47:05,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2024-11-28 02:47:05,387 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 94 states have (on average 3.1702127659574466) internal successors, (298), 95 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2024-11-28 02:47:05,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:47:05,388 INFO L225 Difference]: With dead ends: 2928 [2024-11-28 02:47:05,388 INFO L226 Difference]: Without dead ends: 2506 [2024-11-28 02:47:05,389 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8452 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=2733, Invalid=23349, Unknown=0, NotChecked=0, Total=26082 [2024-11-28 02:47:05,390 INFO L435 NwaCegarLoop]: 94 mSDtfsCounter, 734 mSDsluCounter, 3347 mSDsCounter, 0 mSdLazyCounter, 5170 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 734 SdHoareTripleChecker+Valid, 3441 SdHoareTripleChecker+Invalid, 5380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 5170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2024-11-28 02:47:05,390 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [734 Valid, 3441 Invalid, 5380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 5170 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2024-11-28 02:47:05,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2506 states. [2024-11-28 02:47:05,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2506 to 1928. [2024-11-28 02:47:05,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1928 states, 1924 states have (on average 1.0836798336798337) internal successors, (2085), 1927 states have internal predecessors, (2085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:47:05,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1928 states to 1928 states and 2085 transitions. [2024-11-28 02:47:05,404 INFO L78 Accepts]: Start accepts. Automaton has 1928 states and 2085 transitions. Word has length 108 [2024-11-28 02:47:05,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:47:05,404 INFO L471 AbstractCegarLoop]: Abstraction has 1928 states and 2085 transitions. [2024-11-28 02:47:05,404 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 94 states have (on average 3.1702127659574466) internal successors, (298), 95 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:47:05,404 INFO L276 IsEmpty]: Start isEmpty. Operand 1928 states and 2085 transitions. [2024-11-28 02:47:05,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2024-11-28 02:47:05,405 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:47:05,405 INFO L218 NwaCegarLoop]: trace histogram [15, 15, 15, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:47:05,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2024-11-28 02:47:05,606 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:47:05,606 INFO L396 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:47:05,606 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:47:05,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1615532833, now seen corresponding path program 15 times [2024-11-28 02:47:05,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:47:05,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3819935] [2024-11-28 02:47:05,607 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:47:05,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:47:05,684 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2024-11-28 02:47:05,684 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:47:07,248 INFO L134 CoverageAnalysis]: Checked inductivity of 655 backedges. 68 proven. 585 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 02:47:07,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:47:07,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3819935] [2024-11-28 02:47:07,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3819935] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:47:07,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392909934] [2024-11-28 02:47:07,248 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:47:07,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:47:07,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:47:07,250 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:47:07,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2024-11-28 02:47:08,074 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2024-11-28 02:47:08,074 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:47:08,080 INFO L256 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 154 conjuncts are in the unsatisfiable core [2024-11-28 02:47:08,086 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:47:08,806 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 02:47:08,985 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 7 treesize of output 3 [2024-11-28 02:47:08,985 INFO L134 CoverageAnalysis]: Checked inductivity of 655 backedges. 68 proven. 585 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 02:47:08,985 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:47:09,087 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 18 treesize of output 16 [2024-11-28 02:47:09,090 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2024-11-28 02:47:09,310 INFO L134 CoverageAnalysis]: Checked inductivity of 655 backedges. 68 proven. 585 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 02:47:09,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392909934] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:47:09,310 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:47:09,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 54 [2024-11-28 02:47:09,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222528688] [2024-11-28 02:47:09,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:47:09,311 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2024-11-28 02:47:09,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:47:09,311 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2024-11-28 02:47:09,311 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=2725, Unknown=0, NotChecked=0, Total=2862 [2024-11-28 02:47:09,311 INFO L87 Difference]: Start difference. First operand 1928 states and 2085 transitions. Second operand has 54 states, 54 states have (on average 3.2962962962962963) internal successors, (178), 54 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:47:12,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:47:12,184 INFO L93 Difference]: Finished difference Result 2947 states and 3132 transitions. [2024-11-28 02:47:12,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-11-28 02:47:12,185 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 3.2962962962962963) internal successors, (178), 54 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2024-11-28 02:47:12,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:47:12,187 INFO L225 Difference]: With dead ends: 2947 [2024-11-28 02:47:12,187 INFO L226 Difference]: Without dead ends: 2804 [2024-11-28 02:47:12,187 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=211, Invalid=4345, Unknown=0, NotChecked=0, Total=4556 [2024-11-28 02:47:12,188 INFO L435 NwaCegarLoop]: 157 mSDtfsCounter, 133 mSDsluCounter, 5459 mSDsCounter, 0 mSdLazyCounter, 4225 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 5616 SdHoareTripleChecker+Invalid, 4264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 4225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-11-28 02:47:12,188 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 5616 Invalid, 4264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 4225 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-11-28 02:47:12,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2804 states. [2024-11-28 02:47:12,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2804 to 2191. [2024-11-28 02:47:12,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2191 states, 2187 states have (on average 1.0850480109739369) internal successors, (2373), 2190 states have internal predecessors, (2373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:47:12,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2191 states to 2191 states and 2373 transitions. [2024-11-28 02:47:12,207 INFO L78 Accepts]: Start accepts. Automaton has 2191 states and 2373 transitions. Word has length 111 [2024-11-28 02:47:12,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:47:12,207 INFO L471 AbstractCegarLoop]: Abstraction has 2191 states and 2373 transitions. [2024-11-28 02:47:12,207 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 3.2962962962962963) internal successors, (178), 54 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:47:12,207 INFO L276 IsEmpty]: Start isEmpty. Operand 2191 states and 2373 transitions. [2024-11-28 02:47:12,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2024-11-28 02:47:12,209 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:47:12,209 INFO L218 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 3, 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] [2024-11-28 02:47:12,221 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2024-11-28 02:47:12,409 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:47:12,409 INFO L396 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:47:12,410 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:47:12,410 INFO L85 PathProgramCache]: Analyzing trace with hash 409431557, now seen corresponding path program 11 times [2024-11-28 02:47:12,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:47:12,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712246190] [2024-11-28 02:47:12,410 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 02:47:12,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:47:12,460 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2024-11-28 02:47:12,461 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:47:14,996 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 4 proven. 354 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:47:14,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:47:14,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712246190] [2024-11-28 02:47:14,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712246190] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:47:14,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494833257] [2024-11-28 02:47:14,997 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 02:47:14,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:47:14,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:47:14,999 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:47:15,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2024-11-28 02:47:15,790 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2024-11-28 02:47:15,790 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:47:15,796 INFO L256 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 149 conjuncts are in the unsatisfiable core [2024-11-28 02:47:15,802 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:47:15,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:47:15,812 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 13 treesize of output 7 [2024-11-28 02:47:15,820 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 10 treesize of output 8 [2024-11-28 02:47:19,180 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 358 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:47:19,181 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:47:22,828 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 358 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:47:22,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494833257] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:47:22,829 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:47:22,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 30, 31] total 92 [2024-11-28 02:47:22,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525829527] [2024-11-28 02:47:22,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:47:22,829 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2024-11-28 02:47:22,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:47:22,830 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2024-11-28 02:47:22,830 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=463, Invalid=8093, Unknown=0, NotChecked=0, Total=8556 [2024-11-28 02:47:22,831 INFO L87 Difference]: Start difference. First operand 2191 states and 2373 transitions. Second operand has 93 states, 92 states have (on average 3.380434782608696) internal successors, (311), 93 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:47:38,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:47:38,308 INFO L93 Difference]: Finished difference Result 3476 states and 3714 transitions. [2024-11-28 02:47:38,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2024-11-28 02:47:38,309 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 92 states have (on average 3.380434782608696) internal successors, (311), 93 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2024-11-28 02:47:38,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:47:38,310 INFO L225 Difference]: With dead ends: 3476 [2024-11-28 02:47:38,310 INFO L226 Difference]: Without dead ends: 3420 [2024-11-28 02:47:38,312 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9178 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=2292, Invalid=31748, Unknown=0, NotChecked=0, Total=34040 [2024-11-28 02:47:38,312 INFO L435 NwaCegarLoop]: 102 mSDtfsCounter, 1132 mSDsluCounter, 4849 mSDsCounter, 0 mSdLazyCounter, 7931 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1132 SdHoareTripleChecker+Valid, 4951 SdHoareTripleChecker+Invalid, 8154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 7931 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2024-11-28 02:47:38,312 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1132 Valid, 4951 Invalid, 8154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 7931 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2024-11-28 02:47:38,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3420 states. [2024-11-28 02:47:38,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3420 to 2210. [2024-11-28 02:47:38,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2210 states, 2206 states have (on average 1.086582048957389) internal successors, (2397), 2209 states have internal predecessors, (2397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:47:38,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2210 states to 2210 states and 2397 transitions. [2024-11-28 02:47:38,329 INFO L78 Accepts]: Start accepts. Automaton has 2210 states and 2397 transitions. Word has length 111 [2024-11-28 02:47:38,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:47:38,329 INFO L471 AbstractCegarLoop]: Abstraction has 2210 states and 2397 transitions. [2024-11-28 02:47:38,329 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 92 states have (on average 3.380434782608696) internal successors, (311), 93 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:47:38,329 INFO L276 IsEmpty]: Start isEmpty. Operand 2210 states and 2397 transitions. [2024-11-28 02:47:38,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2024-11-28 02:47:38,330 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:47:38,331 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:47:38,340 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2024-11-28 02:47:38,531 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:47:38,531 INFO L396 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:47:38,531 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:47:38,532 INFO L85 PathProgramCache]: Analyzing trace with hash 2006774089, now seen corresponding path program 12 times [2024-11-28 02:47:38,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:47:38,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037924748] [2024-11-28 02:47:38,532 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 02:47:38,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:47:38,585 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2024-11-28 02:47:38,585 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:47:40,476 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 190 proven. 311 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:47:40,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:47:40,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037924748] [2024-11-28 02:47:40,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037924748] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:47:40,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275260983] [2024-11-28 02:47:40,477 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 02:47:40,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:47:40,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:47:40,482 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:47:40,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2024-11-28 02:47:41,555 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2024-11-28 02:47:41,556 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:47:41,563 INFO L256 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 164 conjuncts are in the unsatisfiable core [2024-11-28 02:47:41,569 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:47:41,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:47:41,580 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 13 treesize of output 7 [2024-11-28 02:47:41,588 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 10 treesize of output 8 [2024-11-28 02:47:44,225 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 0 proven. 501 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:47:44,225 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:47:48,209 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 0 proven. 501 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:47:48,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275260983] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:47:48,209 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:47:48,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 33] total 95 [2024-11-28 02:47:48,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039530767] [2024-11-28 02:47:48,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:47:48,210 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2024-11-28 02:47:48,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:47:48,210 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2024-11-28 02:47:48,211 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=766, Invalid=8354, Unknown=0, NotChecked=0, Total=9120 [2024-11-28 02:47:48,211 INFO L87 Difference]: Start difference. First operand 2210 states and 2397 transitions. Second operand has 96 states, 95 states have (on average 3.536842105263158) internal successors, (336), 96 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:47:58,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:47:58,500 INFO L93 Difference]: Finished difference Result 3209 states and 3410 transitions. [2024-11-28 02:47:58,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2024-11-28 02:47:58,501 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 95 states have (on average 3.536842105263158) internal successors, (336), 96 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2024-11-28 02:47:58,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:47:58,503 INFO L225 Difference]: With dead ends: 3209 [2024-11-28 02:47:58,503 INFO L226 Difference]: Without dead ends: 3125 [2024-11-28 02:47:58,505 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7186 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=2842, Invalid=25888, Unknown=0, NotChecked=0, Total=28730 [2024-11-28 02:47:58,505 INFO L435 NwaCegarLoop]: 112 mSDtfsCounter, 1292 mSDsluCounter, 3313 mSDsCounter, 0 mSdLazyCounter, 5247 mSolverCounterSat, 293 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1292 SdHoareTripleChecker+Valid, 3425 SdHoareTripleChecker+Invalid, 5540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 293 IncrementalHoareTripleChecker+Valid, 5247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2024-11-28 02:47:58,506 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1292 Valid, 3425 Invalid, 5540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [293 Valid, 5247 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2024-11-28 02:47:58,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3125 states. [2024-11-28 02:47:58,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3125 to 2177. [2024-11-28 02:47:58,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2177 states, 2173 states have (on average 1.0860561435803038) internal successors, (2360), 2176 states have internal predecessors, (2360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:47:58,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2177 states to 2177 states and 2360 transitions. [2024-11-28 02:47:58,526 INFO L78 Accepts]: Start accepts. Automaton has 2177 states and 2360 transitions. Word has length 114 [2024-11-28 02:47:58,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:47:58,526 INFO L471 AbstractCegarLoop]: Abstraction has 2177 states and 2360 transitions. [2024-11-28 02:47:58,526 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 95 states have (on average 3.536842105263158) internal successors, (336), 96 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:47:58,526 INFO L276 IsEmpty]: Start isEmpty. Operand 2177 states and 2360 transitions. [2024-11-28 02:47:58,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-11-28 02:47:58,528 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:47:58,528 INFO L218 NwaCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:47:58,541 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2024-11-28 02:47:58,728 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:47:58,728 INFO L396 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:47:58,729 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:47:58,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1612530918, now seen corresponding path program 16 times [2024-11-28 02:47:58,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:47:58,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929413117] [2024-11-28 02:47:58,729 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:47:58,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:47:58,828 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:47:58,828 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:48:00,992 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 325 proven. 383 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:48:00,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:48:00,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929413117] [2024-11-28 02:48:00,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929413117] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:48:00,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199912808] [2024-11-28 02:48:00,993 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:48:00,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:48:00,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:48:00,996 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:48:00,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2024-11-28 02:48:01,815 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:48:01,816 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:48:01,822 INFO L256 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 162 conjuncts are in the unsatisfiable core [2024-11-28 02:48:01,828 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:48:02,714 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 02:48:03,768 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 29 proven. 679 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:48:03,768 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:48:03,853 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 18 treesize of output 16 [2024-11-28 02:48:03,855 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2024-11-28 02:48:04,099 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 29 proven. 679 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:48:04,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199912808] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:48:04,100 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:48:04,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 73 [2024-11-28 02:48:04,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239866016] [2024-11-28 02:48:04,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:48:04,100 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2024-11-28 02:48:04,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:48:04,102 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2024-11-28 02:48:04,103 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=4887, Unknown=0, NotChecked=0, Total=5256 [2024-11-28 02:48:04,103 INFO L87 Difference]: Start difference. First operand 2177 states and 2360 transitions. Second operand has 73 states, 73 states have (on average 3.1506849315068495) internal successors, (230), 73 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:48:09,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:48:09,613 INFO L93 Difference]: Finished difference Result 4091 states and 4323 transitions. [2024-11-28 02:48:09,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2024-11-28 02:48:09,613 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 3.1506849315068495) internal successors, (230), 73 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2024-11-28 02:48:09,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:48:09,616 INFO L225 Difference]: With dead ends: 4091 [2024-11-28 02:48:09,617 INFO L226 Difference]: Without dead ends: 4041 [2024-11-28 02:48:09,618 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2548 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=650, Invalid=10692, Unknown=0, NotChecked=0, Total=11342 [2024-11-28 02:48:09,618 INFO L435 NwaCegarLoop]: 150 mSDtfsCounter, 357 mSDsluCounter, 5505 mSDsCounter, 0 mSdLazyCounter, 6617 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 5655 SdHoareTripleChecker+Invalid, 6717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 6617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2024-11-28 02:48:09,618 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [357 Valid, 5655 Invalid, 6717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 6617 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2024-11-28 02:48:09,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4041 states. [2024-11-28 02:48:09,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4041 to 2581. [2024-11-28 02:48:09,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2581 states, 2577 states have (on average 1.0880869227784244) internal successors, (2804), 2580 states have internal predecessors, (2804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:48:09,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2581 states to 2581 states and 2804 transitions. [2024-11-28 02:48:09,659 INFO L78 Accepts]: Start accepts. Automaton has 2581 states and 2804 transitions. Word has length 115 [2024-11-28 02:48:09,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:48:09,659 INFO L471 AbstractCegarLoop]: Abstraction has 2581 states and 2804 transitions. [2024-11-28 02:48:09,659 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 3.1506849315068495) internal successors, (230), 73 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:48:09,660 INFO L276 IsEmpty]: Start isEmpty. Operand 2581 states and 2804 transitions. [2024-11-28 02:48:09,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-11-28 02:48:09,662 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:48:09,663 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:48:09,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2024-11-28 02:48:09,863 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:48:09,863 INFO L396 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:48:09,864 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:48:09,864 INFO L85 PathProgramCache]: Analyzing trace with hash 276556972, now seen corresponding path program 13 times [2024-11-28 02:48:09,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:48:09,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413035939] [2024-11-28 02:48:09,864 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 02:48:09,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:48:09,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:48:12,065 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 76 proven. 224 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:48:12,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:48:12,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413035939] [2024-11-28 02:48:12,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413035939] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:48:12,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785651583] [2024-11-28 02:48:12,065 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 02:48:12,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:48:12,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:48:12,067 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:48:12,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2024-11-28 02:48:12,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:48:12,603 INFO L256 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 83 conjuncts are in the unsatisfiable core [2024-11-28 02:48:12,605 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:48:13,001 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 02:48:13,205 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 27 proven. 207 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-28 02:48:13,205 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:48:13,293 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 13 [2024-11-28 02:48:13,294 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 16 treesize of output 12 [2024-11-28 02:48:13,445 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 27 proven. 207 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-28 02:48:13,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785651583] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:48:13,445 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:48:13,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 22, 22] total 44 [2024-11-28 02:48:13,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048532093] [2024-11-28 02:48:13,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:48:13,445 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-28 02:48:13,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:48:13,446 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-28 02:48:13,446 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1770, Unknown=0, NotChecked=0, Total=1892 [2024-11-28 02:48:13,446 INFO L87 Difference]: Start difference. First operand 2581 states and 2804 transitions. Second operand has 44 states, 44 states have (on average 3.659090909090909) internal successors, (161), 44 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:48:15,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:48:15,919 INFO L93 Difference]: Finished difference Result 3435 states and 3776 transitions. [2024-11-28 02:48:15,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2024-11-28 02:48:15,920 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.659090909090909) internal successors, (161), 44 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2024-11-28 02:48:15,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:48:15,922 INFO L225 Difference]: With dead ends: 3435 [2024-11-28 02:48:15,922 INFO L226 Difference]: Without dead ends: 3285 [2024-11-28 02:48:15,923 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 688 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=291, Invalid=4401, Unknown=0, NotChecked=0, Total=4692 [2024-11-28 02:48:15,923 INFO L435 NwaCegarLoop]: 81 mSDtfsCounter, 80 mSDsluCounter, 2444 mSDsCounter, 0 mSdLazyCounter, 2583 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 2525 SdHoareTripleChecker+Invalid, 2596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 2583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-28 02:48:15,923 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 2525 Invalid, 2596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 2583 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-28 02:48:15,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3285 states. [2024-11-28 02:48:15,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3285 to 2955. [2024-11-28 02:48:15,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2955 states, 2951 states have (on average 1.0853947814300238) internal successors, (3203), 2954 states have internal predecessors, (3203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:48:15,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2955 states to 2955 states and 3203 transitions. [2024-11-28 02:48:15,948 INFO L78 Accepts]: Start accepts. Automaton has 2955 states and 3203 transitions. Word has length 115 [2024-11-28 02:48:15,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:48:15,948 INFO L471 AbstractCegarLoop]: Abstraction has 2955 states and 3203 transitions. [2024-11-28 02:48:15,948 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.659090909090909) internal successors, (161), 44 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:48:15,948 INFO L276 IsEmpty]: Start isEmpty. Operand 2955 states and 3203 transitions. [2024-11-28 02:48:15,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2024-11-28 02:48:15,950 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:48:15,950 INFO L218 NwaCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:48:15,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2024-11-28 02:48:16,151 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:48:16,151 INFO L396 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:48:16,151 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:48:16,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1488885493, now seen corresponding path program 17 times [2024-11-28 02:48:16,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:48:16,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944220551] [2024-11-28 02:48:16,152 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 02:48:16,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:48:16,213 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2024-11-28 02:48:16,213 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:48:19,395 INFO L134 CoverageAnalysis]: Checked inductivity of 811 backedges. 0 proven. 811 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:48:19,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:48:19,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944220551] [2024-11-28 02:48:19,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944220551] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:48:19,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215793953] [2024-11-28 02:48:19,396 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 02:48:19,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:48:19,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:48:19,398 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:48:19,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2024-11-28 02:48:20,143 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2024-11-28 02:48:20,144 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:48:20,149 INFO L256 TraceCheckSpWp]: Trace formula consists of 534 conjuncts, 170 conjuncts are in the unsatisfiable core [2024-11-28 02:48:20,157 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:48:21,615 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 13 treesize of output 9 [2024-11-28 02:48:23,590 INFO L134 CoverageAnalysis]: Checked inductivity of 811 backedges. 31 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:48:23,590 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:48:23,705 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 18 treesize of output 16 [2024-11-28 02:48:23,707 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2024-11-28 02:48:24,086 INFO L134 CoverageAnalysis]: Checked inductivity of 811 backedges. 31 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:48:24,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215793953] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:48:24,086 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:48:24,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 38, 38] total 79 [2024-11-28 02:48:24,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067950824] [2024-11-28 02:48:24,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:48:24,087 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2024-11-28 02:48:24,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:48:24,088 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2024-11-28 02:48:24,088 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=5994, Unknown=0, NotChecked=0, Total=6162 [2024-11-28 02:48:24,088 INFO L87 Difference]: Start difference. First operand 2955 states and 3203 transitions. Second operand has 79 states, 79 states have (on average 3.1012658227848102) internal successors, (245), 79 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:48:37,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:48:37,434 INFO L93 Difference]: Finished difference Result 4463 states and 4780 transitions. [2024-11-28 02:48:37,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2024-11-28 02:48:37,434 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 3.1012658227848102) internal successors, (245), 79 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 122 [2024-11-28 02:48:37,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:48:37,437 INFO L225 Difference]: With dead ends: 4463 [2024-11-28 02:48:37,438 INFO L226 Difference]: Without dead ends: 4343 [2024-11-28 02:48:37,439 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2749 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=554, Invalid=20908, Unknown=0, NotChecked=0, Total=21462 [2024-11-28 02:48:37,439 INFO L435 NwaCegarLoop]: 182 mSDtfsCounter, 317 mSDsluCounter, 11647 mSDsCounter, 0 mSdLazyCounter, 11119 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 11829 SdHoareTripleChecker+Invalid, 11184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 11119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2024-11-28 02:48:37,439 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 11829 Invalid, 11184 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [65 Valid, 11119 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time] [2024-11-28 02:48:37,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4343 states. [2024-11-28 02:48:37,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4343 to 3333. [2024-11-28 02:48:37,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3333 states, 3329 states have (on average 1.0889155902673475) internal successors, (3625), 3332 states have internal predecessors, (3625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:48:37,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3333 states to 3333 states and 3625 transitions. [2024-11-28 02:48:37,468 INFO L78 Accepts]: Start accepts. Automaton has 3333 states and 3625 transitions. Word has length 122 [2024-11-28 02:48:37,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:48:37,468 INFO L471 AbstractCegarLoop]: Abstraction has 3333 states and 3625 transitions. [2024-11-28 02:48:37,468 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 3.1012658227848102) internal successors, (245), 79 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:48:37,468 INFO L276 IsEmpty]: Start isEmpty. Operand 3333 states and 3625 transitions. [2024-11-28 02:48:37,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2024-11-28 02:48:37,471 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:48:37,471 INFO L218 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:48:37,484 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2024-11-28 02:48:37,671 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:48:37,671 INFO L396 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:48:37,672 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:48:37,672 INFO L85 PathProgramCache]: Analyzing trace with hash 842695901, now seen corresponding path program 14 times [2024-11-28 02:48:37,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:48:37,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101809764] [2024-11-28 02:48:37,672 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:48:37,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:48:37,729 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:48:37,730 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:48:39,971 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 136 proven. 242 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 02:48:39,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:48:39,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101809764] [2024-11-28 02:48:39,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101809764] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:48:39,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065986885] [2024-11-28 02:48:39,971 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:48:39,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:48:39,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:48:39,976 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:48:39,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2024-11-28 02:48:40,604 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:48:40,604 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:48:40,608 INFO L256 TraceCheckSpWp]: Trace formula consists of 534 conjuncts, 160 conjuncts are in the unsatisfiable core [2024-11-28 02:48:40,614 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:48:40,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:48:40,726 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 13 treesize of output 7 [2024-11-28 02:48:40,730 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 10 treesize of output 8 [2024-11-28 02:48:44,680 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 02:48:44,680 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:48:49,864 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 02:48:50,101 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 02:48:50,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065986885] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:48:50,101 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:48:50,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 36, 37] total 104 [2024-11-28 02:48:50,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470809489] [2024-11-28 02:48:50,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:48:50,102 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2024-11-28 02:48:50,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:48:50,103 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2024-11-28 02:48:50,104 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1106, Invalid=9814, Unknown=0, NotChecked=0, Total=10920 [2024-11-28 02:48:50,105 INFO L87 Difference]: Start difference. First operand 3333 states and 3625 transitions. Second operand has 105 states, 104 states have (on average 3.269230769230769) internal successors, (340), 105 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:49:03,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:49:03,177 INFO L93 Difference]: Finished difference Result 4240 states and 4539 transitions. [2024-11-28 02:49:03,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2024-11-28 02:49:03,178 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 104 states have (on average 3.269230769230769) internal successors, (340), 105 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 122 [2024-11-28 02:49:03,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:49:03,180 INFO L225 Difference]: With dead ends: 4240 [2024-11-28 02:49:03,180 INFO L226 Difference]: Without dead ends: 3661 [2024-11-28 02:49:03,181 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 171 SyntacticMatches, 1 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9286 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=3345, Invalid=25385, Unknown=0, NotChecked=0, Total=28730 [2024-11-28 02:49:03,182 INFO L435 NwaCegarLoop]: 107 mSDtfsCounter, 909 mSDsluCounter, 4206 mSDsCounter, 0 mSdLazyCounter, 6696 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 909 SdHoareTripleChecker+Valid, 4313 SdHoareTripleChecker+Invalid, 6913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 6696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2024-11-28 02:49:03,182 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [909 Valid, 4313 Invalid, 6913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 6696 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2024-11-28 02:49:03,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3661 states. [2024-11-28 02:49:03,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3661 to 2890. [2024-11-28 02:49:03,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2890 states, 2886 states have (on average 1.0897435897435896) internal successors, (3145), 2889 states have internal predecessors, (3145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:49:03,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2890 states to 2890 states and 3145 transitions. [2024-11-28 02:49:03,218 INFO L78 Accepts]: Start accepts. Automaton has 2890 states and 3145 transitions. Word has length 122 [2024-11-28 02:49:03,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:49:03,219 INFO L471 AbstractCegarLoop]: Abstraction has 2890 states and 3145 transitions. [2024-11-28 02:49:03,219 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 104 states have (on average 3.269230769230769) internal successors, (340), 105 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:49:03,219 INFO L276 IsEmpty]: Start isEmpty. Operand 2890 states and 3145 transitions. [2024-11-28 02:49:03,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2024-11-28 02:49:03,222 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:49:03,223 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:49:03,238 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2024-11-28 02:49:03,423 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:49:03,423 INFO L396 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:49:03,424 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:49:03,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1901381154, now seen corresponding path program 14 times [2024-11-28 02:49:03,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:49:03,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418893052] [2024-11-28 02:49:03,424 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:49:03,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:49:03,456 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:49:03,456 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:49:04,418 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 45 proven. 214 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-11-28 02:49:04,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:49:04,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418893052] [2024-11-28 02:49:04,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418893052] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:49:04,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131546790] [2024-11-28 02:49:04,419 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:49:04,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:49:04,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:49:04,421 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:49:04,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2024-11-28 02:49:04,999 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:49:04,999 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:49:05,003 INFO L256 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 79 conjuncts are in the unsatisfiable core [2024-11-28 02:49:05,006 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:49:05,014 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-28 02:49:05,602 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 66 proven. 193 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-11-28 02:49:05,602 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:49:06,702 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 66 proven. 193 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-11-28 02:49:06,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131546790] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:49:06,702 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:49:06,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 20] total 50 [2024-11-28 02:49:06,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788311976] [2024-11-28 02:49:06,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:49:06,703 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-11-28 02:49:06,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:49:06,704 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-11-28 02:49:06,705 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=2261, Unknown=0, NotChecked=0, Total=2550 [2024-11-28 02:49:06,705 INFO L87 Difference]: Start difference. First operand 2890 states and 3145 transitions. Second operand has 51 states, 50 states have (on average 4.6) internal successors, (230), 51 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:49:08,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:49:08,033 INFO L93 Difference]: Finished difference Result 3090 states and 3348 transitions. [2024-11-28 02:49:08,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-28 02:49:08,033 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 4.6) internal successors, (230), 51 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2024-11-28 02:49:08,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:49:08,035 INFO L225 Difference]: With dead ends: 3090 [2024-11-28 02:49:08,035 INFO L226 Difference]: Without dead ends: 3090 [2024-11-28 02:49:08,036 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 980 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=361, Invalid=2945, Unknown=0, NotChecked=0, Total=3306 [2024-11-28 02:49:08,036 INFO L435 NwaCegarLoop]: 73 mSDtfsCounter, 68 mSDsluCounter, 1326 mSDsCounter, 0 mSdLazyCounter, 1658 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 1399 SdHoareTripleChecker+Invalid, 1658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-28 02:49:08,036 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 1399 Invalid, 1658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1658 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-28 02:49:08,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3090 states. [2024-11-28 02:49:08,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3090 to 2904. [2024-11-28 02:49:08,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2904 states, 2900 states have (on average 1.09) internal successors, (3161), 2903 states have internal predecessors, (3161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:49:08,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2904 states to 2904 states and 3161 transitions. [2024-11-28 02:49:08,062 INFO L78 Accepts]: Start accepts. Automaton has 2904 states and 3161 transitions. Word has length 123 [2024-11-28 02:49:08,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:49:08,062 INFO L471 AbstractCegarLoop]: Abstraction has 2904 states and 3161 transitions. [2024-11-28 02:49:08,062 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 4.6) internal successors, (230), 51 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:49:08,062 INFO L276 IsEmpty]: Start isEmpty. Operand 2904 states and 3161 transitions. [2024-11-28 02:49:08,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2024-11-28 02:49:08,064 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:49:08,064 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:49:08,078 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2024-11-28 02:49:08,264 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:49:08,264 INFO L396 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:49:08,265 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:49:08,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1886359189, now seen corresponding path program 15 times [2024-11-28 02:49:08,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:49:08,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838944338] [2024-11-28 02:49:08,265 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:49:08,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:49:08,339 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2024-11-28 02:49:08,339 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:49:13,645 INFO L134 CoverageAnalysis]: Checked inductivity of 519 backedges. 195 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:49:13,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:49:13,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838944338] [2024-11-28 02:49:13,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838944338] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:49:13,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294223617] [2024-11-28 02:49:13,646 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:49:13,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:49:13,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:49:13,648 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:49:13,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2024-11-28 02:49:14,844 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2024-11-28 02:49:14,844 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:49:14,851 INFO L256 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 154 conjuncts are in the unsatisfiable core [2024-11-28 02:49:14,857 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:49:15,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:49:15,023 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 13 treesize of output 7 [2024-11-28 02:49:15,030 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 10 treesize of output 8 [2024-11-28 02:49:19,284 INFO L134 CoverageAnalysis]: Checked inductivity of 519 backedges. 231 proven. 282 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:49:19,284 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:49:23,817 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 02:49:24,179 INFO L134 CoverageAnalysis]: Checked inductivity of 519 backedges. 276 proven. 237 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:49:24,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294223617] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:49:24,179 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:49:24,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 35, 35] total 112 [2024-11-28 02:49:24,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487618323] [2024-11-28 02:49:24,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:49:24,179 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2024-11-28 02:49:24,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:49:24,180 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2024-11-28 02:49:24,181 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1063, Invalid=11593, Unknown=0, NotChecked=0, Total=12656 [2024-11-28 02:49:24,181 INFO L87 Difference]: Start difference. First operand 2904 states and 3161 transitions. Second operand has 113 states, 112 states have (on average 3.2589285714285716) internal successors, (365), 113 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:49:35,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:49:35,083 INFO L93 Difference]: Finished difference Result 3435 states and 3699 transitions. [2024-11-28 02:49:35,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2024-11-28 02:49:35,083 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 112 states have (on average 3.2589285714285716) internal successors, (365), 113 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2024-11-28 02:49:35,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:49:35,085 INFO L225 Difference]: With dead ends: 3435 [2024-11-28 02:49:35,085 INFO L226 Difference]: Without dead ends: 2929 [2024-11-28 02:49:35,086 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10059 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=3238, Invalid=29704, Unknown=0, NotChecked=0, Total=32942 [2024-11-28 02:49:35,086 INFO L435 NwaCegarLoop]: 111 mSDtfsCounter, 859 mSDsluCounter, 4059 mSDsCounter, 0 mSdLazyCounter, 7047 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 859 SdHoareTripleChecker+Valid, 4170 SdHoareTripleChecker+Invalid, 7138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 7047 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2024-11-28 02:49:35,086 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [859 Valid, 4170 Invalid, 7138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 7047 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2024-11-28 02:49:35,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2929 states. [2024-11-28 02:49:35,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2929 to 2511. [2024-11-28 02:49:35,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2511 states, 2507 states have (on average 1.0837654567211807) internal successors, (2717), 2510 states have internal predecessors, (2717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:49:35,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2511 states to 2511 states and 2717 transitions. [2024-11-28 02:49:35,108 INFO L78 Accepts]: Start accepts. Automaton has 2511 states and 2717 transitions. Word has length 125 [2024-11-28 02:49:35,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:49:35,108 INFO L471 AbstractCegarLoop]: Abstraction has 2511 states and 2717 transitions. [2024-11-28 02:49:35,108 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 112 states have (on average 3.2589285714285716) internal successors, (365), 113 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:49:35,108 INFO L276 IsEmpty]: Start isEmpty. Operand 2511 states and 2717 transitions. [2024-11-28 02:49:35,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2024-11-28 02:49:35,110 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:49:35,110 INFO L218 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:49:35,125 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2024-11-28 02:49:35,310 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2024-11-28 02:49:35,311 INFO L396 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:49:35,311 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:49:35,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1552783012, now seen corresponding path program 18 times [2024-11-28 02:49:35,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:49:35,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116482329] [2024-11-28 02:49:35,311 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 02:49:35,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:49:35,384 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2024-11-28 02:49:35,384 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:49:38,005 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 378 proven. 494 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:49:38,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:49:38,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116482329] [2024-11-28 02:49:38,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116482329] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:49:38,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024567631] [2024-11-28 02:49:38,006 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 02:49:38,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:49:38,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:49:38,007 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:49:38,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2024-11-28 02:49:39,885 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2024-11-28 02:49:39,885 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:49:39,891 INFO L256 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 129 conjuncts are in the unsatisfiable core [2024-11-28 02:49:39,898 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:49:41,127 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 435 proven. 437 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:49:41,127 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:49:42,629 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 8 treesize of output 6 [2024-11-28 02:49:43,447 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 435 proven. 437 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:49:43,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024567631] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:49:43,447 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:49:43,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 78 [2024-11-28 02:49:43,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800473766] [2024-11-28 02:49:43,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:49:43,447 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2024-11-28 02:49:43,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:49:43,448 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2024-11-28 02:49:43,449 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=816, Invalid=5346, Unknown=0, NotChecked=0, Total=6162 [2024-11-28 02:49:43,449 INFO L87 Difference]: Start difference. First operand 2511 states and 2717 transitions. Second operand has 79 states, 78 states have (on average 3.3076923076923075) internal successors, (258), 79 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:49:46,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:49:46,651 INFO L93 Difference]: Finished difference Result 3753 states and 3989 transitions. [2024-11-28 02:49:46,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2024-11-28 02:49:46,652 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 78 states have (on average 3.3076923076923075) internal successors, (258), 79 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 126 [2024-11-28 02:49:46,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:49:46,654 INFO L225 Difference]: With dead ends: 3753 [2024-11-28 02:49:46,654 INFO L226 Difference]: Without dead ends: 3673 [2024-11-28 02:49:46,655 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 194 SyntacticMatches, 17 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4810 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1838, Invalid=11044, Unknown=0, NotChecked=0, Total=12882 [2024-11-28 02:49:46,655 INFO L435 NwaCegarLoop]: 73 mSDtfsCounter, 637 mSDsluCounter, 1480 mSDsCounter, 0 mSdLazyCounter, 2102 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 637 SdHoareTripleChecker+Valid, 1553 SdHoareTripleChecker+Invalid, 2195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 2102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-28 02:49:46,656 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [637 Valid, 1553 Invalid, 2195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 2102 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-28 02:49:46,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3673 states. [2024-11-28 02:49:46,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3673 to 2641. [2024-11-28 02:49:46,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2641 states, 2637 states have (on average 1.080394387561623) internal successors, (2849), 2640 states have internal predecessors, (2849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:49:46,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2641 states to 2641 states and 2849 transitions. [2024-11-28 02:49:46,678 INFO L78 Accepts]: Start accepts. Automaton has 2641 states and 2849 transitions. Word has length 126 [2024-11-28 02:49:46,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:49:46,678 INFO L471 AbstractCegarLoop]: Abstraction has 2641 states and 2849 transitions. [2024-11-28 02:49:46,678 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 78 states have (on average 3.3076923076923075) internal successors, (258), 79 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:49:46,678 INFO L276 IsEmpty]: Start isEmpty. Operand 2641 states and 2849 transitions. [2024-11-28 02:49:46,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-11-28 02:49:46,680 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:49:46,680 INFO L218 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:49:46,695 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2024-11-28 02:49:46,880 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2024-11-28 02:49:46,880 INFO L396 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:49:46,881 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:49:46,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1670099687, now seen corresponding path program 3 times [2024-11-28 02:49:46,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:49:46,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195970275] [2024-11-28 02:49:46,881 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:49:46,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:49:46,943 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2024-11-28 02:49:46,943 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:49:51,024 INFO L134 CoverageAnalysis]: Checked inductivity of 683 backedges. 276 proven. 407 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:49:51,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:49:51,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195970275] [2024-11-28 02:49:51,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195970275] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:49:51,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304119781] [2024-11-28 02:49:51,025 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:49:51,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:49:51,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:49:51,027 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:49:51,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2024-11-28 02:49:52,362 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2024-11-28 02:49:52,362 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:49:52,369 INFO L256 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 175 conjuncts are in the unsatisfiable core [2024-11-28 02:49:52,376 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:49:52,438 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 13 treesize of output 1 [2024-11-28 02:49:52,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:49:52,443 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2024-11-28 02:49:55,580 INFO L134 CoverageAnalysis]: Checked inductivity of 683 backedges. 0 proven. 682 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:49:55,580 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:49:59,165 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 02:49:59,247 INFO L134 CoverageAnalysis]: Checked inductivity of 683 backedges. 0 proven. 682 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:49:59,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304119781] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:49:59,247 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:49:59,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 36, 36] total 114 [2024-11-28 02:49:59,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356467947] [2024-11-28 02:49:59,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:49:59,248 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2024-11-28 02:49:59,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:49:59,249 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2024-11-28 02:49:59,250 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1101, Invalid=12009, Unknown=0, NotChecked=0, Total=13110 [2024-11-28 02:49:59,250 INFO L87 Difference]: Start difference. First operand 2641 states and 2849 transitions. Second operand has 115 states, 114 states have (on average 3.324561403508772) internal successors, (379), 115 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:50:11,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:50:11,000 INFO L93 Difference]: Finished difference Result 2884 states and 3107 transitions. [2024-11-28 02:50:11,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2024-11-28 02:50:11,000 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 114 states have (on average 3.324561403508772) internal successors, (379), 115 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2024-11-28 02:50:11,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:50:11,002 INFO L225 Difference]: With dead ends: 2884 [2024-11-28 02:50:11,002 INFO L226 Difference]: Without dead ends: 2809 [2024-11-28 02:50:11,003 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15630 ImplicationChecksByTransitivity, 15.3s TimeCoverageRelationStatistics Valid=3976, Invalid=41180, Unknown=0, NotChecked=0, Total=45156 [2024-11-28 02:50:11,004 INFO L435 NwaCegarLoop]: 63 mSDtfsCounter, 513 mSDsluCounter, 1736 mSDsCounter, 0 mSdLazyCounter, 4543 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 513 SdHoareTripleChecker+Valid, 1799 SdHoareTripleChecker+Invalid, 4648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 4543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2024-11-28 02:50:11,004 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [513 Valid, 1799 Invalid, 4648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 4543 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2024-11-28 02:50:11,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2809 states. [2024-11-28 02:50:11,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2809 to 2587. [2024-11-28 02:50:11,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2587 states, 2583 states have (on average 1.08091366627952) internal successors, (2792), 2586 states have internal predecessors, (2792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:50:11,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2587 states to 2587 states and 2792 transitions. [2024-11-28 02:50:11,021 INFO L78 Accepts]: Start accepts. Automaton has 2587 states and 2792 transitions. Word has length 128 [2024-11-28 02:50:11,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:50:11,021 INFO L471 AbstractCegarLoop]: Abstraction has 2587 states and 2792 transitions. [2024-11-28 02:50:11,021 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 114 states have (on average 3.324561403508772) internal successors, (379), 115 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:50:11,021 INFO L276 IsEmpty]: Start isEmpty. Operand 2587 states and 2792 transitions. [2024-11-28 02:50:11,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-11-28 02:50:11,022 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:50:11,023 INFO L218 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:50:11,034 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2024-11-28 02:50:11,223 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2024-11-28 02:50:11,223 INFO L396 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:50:11,223 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:50:11,224 INFO L85 PathProgramCache]: Analyzing trace with hash -723061801, now seen corresponding path program 13 times [2024-11-28 02:50:11,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:50:11,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568863419] [2024-11-28 02:50:11,224 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 02:50:11,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:50:11,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:50:13,503 INFO L134 CoverageAnalysis]: Checked inductivity of 683 backedges. 276 proven. 406 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:50:13,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:50:13,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568863419] [2024-11-28 02:50:13,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568863419] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:50:13,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492981230] [2024-11-28 02:50:13,504 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 02:50:13,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:50:13,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:50:13,506 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:50:13,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2024-11-28 02:50:14,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:50:14,168 INFO L256 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 182 conjuncts are in the unsatisfiable core [2024-11-28 02:50:14,175 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:50:14,243 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 13 treesize of output 1 [2024-11-28 02:50:14,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:50:14,247 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2024-11-28 02:50:18,573 INFO L134 CoverageAnalysis]: Checked inductivity of 683 backedges. 0 proven. 682 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:50:18,573 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:50:24,086 INFO L134 CoverageAnalysis]: Checked inductivity of 683 backedges. 0 proven. 682 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:50:24,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492981230] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:50:24,086 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:50:24,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 38, 37] total 109 [2024-11-28 02:50:24,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214204690] [2024-11-28 02:50:24,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:50:24,087 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2024-11-28 02:50:24,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:50:24,088 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2024-11-28 02:50:24,089 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=819, Invalid=11171, Unknown=0, NotChecked=0, Total=11990 [2024-11-28 02:50:24,089 INFO L87 Difference]: Start difference. First operand 2587 states and 2792 transitions. Second operand has 110 states, 109 states have (on average 3.44954128440367) internal successors, (376), 110 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:50:49,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:50:49,400 INFO L93 Difference]: Finished difference Result 3592 states and 3841 transitions. [2024-11-28 02:50:49,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2024-11-28 02:50:49,401 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 109 states have (on average 3.44954128440367) internal successors, (376), 110 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2024-11-28 02:50:49,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:50:49,403 INFO L225 Difference]: With dead ends: 3592 [2024-11-28 02:50:49,403 INFO L226 Difference]: Without dead ends: 3584 [2024-11-28 02:50:49,406 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18550 ImplicationChecksByTransitivity, 26.4s TimeCoverageRelationStatistics Valid=5327, Invalid=59443, Unknown=0, NotChecked=0, Total=64770 [2024-11-28 02:50:49,406 INFO L435 NwaCegarLoop]: 113 mSDtfsCounter, 1645 mSDsluCounter, 5247 mSDsCounter, 0 mSdLazyCounter, 9807 mSolverCounterSat, 310 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1645 SdHoareTripleChecker+Valid, 5360 SdHoareTripleChecker+Invalid, 10117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 310 IncrementalHoareTripleChecker+Valid, 9807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2024-11-28 02:50:49,406 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1645 Valid, 5360 Invalid, 10117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [310 Valid, 9807 Invalid, 0 Unknown, 0 Unchecked, 7.0s Time] [2024-11-28 02:50:49,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3584 states. [2024-11-28 02:50:49,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3584 to 2821. [2024-11-28 02:50:49,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2821 states, 2817 states have (on average 1.0777422790202342) internal successors, (3036), 2820 states have internal predecessors, (3036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:50:49,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2821 states to 2821 states and 3036 transitions. [2024-11-28 02:50:49,456 INFO L78 Accepts]: Start accepts. Automaton has 2821 states and 3036 transitions. Word has length 128 [2024-11-28 02:50:49,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:50:49,456 INFO L471 AbstractCegarLoop]: Abstraction has 2821 states and 3036 transitions. [2024-11-28 02:50:49,456 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 109 states have (on average 3.44954128440367) internal successors, (376), 110 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:50:49,456 INFO L276 IsEmpty]: Start isEmpty. Operand 2821 states and 3036 transitions. [2024-11-28 02:50:49,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-11-28 02:50:49,458 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:50:49,458 INFO L218 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:50:49,468 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2024-11-28 02:50:49,659 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2024-11-28 02:50:49,659 INFO L396 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:50:49,659 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:50:49,660 INFO L85 PathProgramCache]: Analyzing trace with hash -723070901, now seen corresponding path program 16 times [2024-11-28 02:50:49,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:50:49,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396403165] [2024-11-28 02:50:49,660 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:50:49,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:50:49,725 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:50:49,725 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:50:51,696 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 276 proven. 407 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:50:51,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:50:51,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396403165] [2024-11-28 02:50:51,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396403165] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:50:51,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233285713] [2024-11-28 02:50:51,697 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:50:51,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:50:51,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:50:51,698 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:50:51,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2024-11-28 02:50:52,533 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:50:52,533 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:50:52,538 INFO L256 TraceCheckSpWp]: Trace formula consists of 556 conjuncts, 162 conjuncts are in the unsatisfiable core [2024-11-28 02:50:52,543 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:50:52,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:50:52,633 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 13 treesize of output 7 [2024-11-28 02:50:52,638 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 10 treesize of output 8 [2024-11-28 02:50:57,017 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 313 proven. 370 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:50:57,017 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:51:00,724 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 02:51:00,979 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 378 proven. 305 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:51:00,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233285713] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:51:00,979 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:51:00,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 104 [2024-11-28 02:51:00,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503335706] [2024-11-28 02:51:00,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:51:00,980 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2024-11-28 02:51:00,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:51:00,980 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2024-11-28 02:51:00,981 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1120, Invalid=9800, Unknown=0, NotChecked=0, Total=10920 [2024-11-28 02:51:00,981 INFO L87 Difference]: Start difference. First operand 2821 states and 3036 transitions. Second operand has 105 states, 104 states have (on average 3.673076923076923) internal successors, (382), 105 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:51:05,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:51:05,659 INFO L93 Difference]: Finished difference Result 3797 states and 4006 transitions. [2024-11-28 02:51:05,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-11-28 02:51:05,660 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 104 states have (on average 3.673076923076923) internal successors, (382), 105 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2024-11-28 02:51:05,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:51:05,662 INFO L225 Difference]: With dead ends: 3797 [2024-11-28 02:51:05,662 INFO L226 Difference]: Without dead ends: 3731 [2024-11-28 02:51:05,663 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4001 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=1728, Invalid=12792, Unknown=0, NotChecked=0, Total=14520 [2024-11-28 02:51:05,663 INFO L435 NwaCegarLoop]: 144 mSDtfsCounter, 429 mSDsluCounter, 4416 mSDsCounter, 0 mSdLazyCounter, 5196 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 4560 SdHoareTripleChecker+Invalid, 5253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 5196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2024-11-28 02:51:05,663 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [429 Valid, 4560 Invalid, 5253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 5196 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2024-11-28 02:51:05,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3731 states. [2024-11-28 02:51:05,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3731 to 2686. [2024-11-28 02:51:05,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2686 states, 2682 states have (on average 1.0782997762863535) internal successors, (2892), 2685 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:51:05,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2686 states to 2686 states and 2892 transitions. [2024-11-28 02:51:05,686 INFO L78 Accepts]: Start accepts. Automaton has 2686 states and 2892 transitions. Word has length 128 [2024-11-28 02:51:05,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:51:05,687 INFO L471 AbstractCegarLoop]: Abstraction has 2686 states and 2892 transitions. [2024-11-28 02:51:05,687 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 104 states have (on average 3.673076923076923) internal successors, (382), 105 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:51:05,687 INFO L276 IsEmpty]: Start isEmpty. Operand 2686 states and 2892 transitions. [2024-11-28 02:51:05,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2024-11-28 02:51:05,690 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:51:05,690 INFO L218 NwaCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:51:05,707 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2024-11-28 02:51:05,890 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2024-11-28 02:51:05,891 INFO L396 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:51:05,891 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:51:05,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1427455118, now seen corresponding path program 9 times [2024-11-28 02:51:05,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:51:05,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037092305] [2024-11-28 02:51:05,891 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:51:05,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:51:05,966 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2024-11-28 02:51:05,966 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:51:08,746 INFO L134 CoverageAnalysis]: Checked inductivity of 921 backedges. 153 proven. 768 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:51:08,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:51:08,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037092305] [2024-11-28 02:51:08,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037092305] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:51:08,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113223807] [2024-11-28 02:51:08,746 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:51:08,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:51:08,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:51:08,748 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:51:08,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2024-11-28 02:51:10,655 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2024-11-28 02:51:10,655 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:51:10,662 INFO L256 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 180 conjuncts are in the unsatisfiable core [2024-11-28 02:51:10,669 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:51:11,554 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 02:51:12,683 INFO L134 CoverageAnalysis]: Checked inductivity of 921 backedges. 33 proven. 888 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:51:12,683 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:51:12,770 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 18 treesize of output 16 [2024-11-28 02:51:12,771 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2024-11-28 02:51:13,019 INFO L134 CoverageAnalysis]: Checked inductivity of 921 backedges. 33 proven. 888 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:51:13,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113223807] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:51:13,019 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:51:13,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 81 [2024-11-28 02:51:13,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337243148] [2024-11-28 02:51:13,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:51:13,020 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2024-11-28 02:51:13,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:51:13,020 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2024-11-28 02:51:13,021 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=6100, Unknown=0, NotChecked=0, Total=6480 [2024-11-28 02:51:13,021 INFO L87 Difference]: Start difference. First operand 2686 states and 2892 transitions. Second operand has 81 states, 81 states have (on average 3.234567901234568) internal successors, (262), 81 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:51:22,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:51:22,663 INFO L93 Difference]: Finished difference Result 5314 states and 5582 transitions. [2024-11-28 02:51:22,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2024-11-28 02:51:22,663 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 3.234567901234568) internal successors, (262), 81 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 129 [2024-11-28 02:51:22,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:51:22,667 INFO L225 Difference]: With dead ends: 5314 [2024-11-28 02:51:22,667 INFO L226 Difference]: Without dead ends: 5029 [2024-11-28 02:51:22,668 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5222 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=1435, Invalid=20027, Unknown=0, NotChecked=0, Total=21462 [2024-11-28 02:51:22,669 INFO L435 NwaCegarLoop]: 152 mSDtfsCounter, 1245 mSDsluCounter, 6768 mSDsCounter, 0 mSdLazyCounter, 8114 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1245 SdHoareTripleChecker+Valid, 6920 SdHoareTripleChecker+Invalid, 8314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 8114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2024-11-28 02:51:22,669 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1245 Valid, 6920 Invalid, 8314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 8114 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2024-11-28 02:51:22,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5029 states. [2024-11-28 02:51:22,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5029 to 2991. [2024-11-28 02:51:22,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2991 states, 2987 states have (on average 1.0816873116839638) internal successors, (3231), 2990 states have internal predecessors, (3231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:51:22,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2991 states to 2991 states and 3231 transitions. [2024-11-28 02:51:22,708 INFO L78 Accepts]: Start accepts. Automaton has 2991 states and 3231 transitions. Word has length 129 [2024-11-28 02:51:22,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:51:22,708 INFO L471 AbstractCegarLoop]: Abstraction has 2991 states and 3231 transitions. [2024-11-28 02:51:22,708 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 3.234567901234568) internal successors, (262), 81 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:51:22,708 INFO L276 IsEmpty]: Start isEmpty. Operand 2991 states and 3231 transitions. [2024-11-28 02:51:22,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2024-11-28 02:51:22,710 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:51:22,710 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:51:22,727 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2024-11-28 02:51:22,911 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:51:22,911 INFO L396 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:51:22,911 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:51:22,911 INFO L85 PathProgramCache]: Analyzing trace with hash 727873335, now seen corresponding path program 15 times [2024-11-28 02:51:22,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:51:22,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235810466] [2024-11-28 02:51:22,912 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:51:22,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:51:22,974 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-11-28 02:51:22,974 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:51:25,044 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 76 proven. 326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:51:25,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:51:25,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235810466] [2024-11-28 02:51:25,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235810466] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:51:25,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266549331] [2024-11-28 02:51:25,045 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:51:25,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:51:25,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:51:25,047 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:51:25,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2024-11-28 02:51:26,525 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-11-28 02:51:26,525 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:51:26,539 INFO L256 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 93 conjuncts are in the unsatisfiable core [2024-11-28 02:51:26,542 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:51:27,087 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 02:51:27,294 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 31 proven. 280 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-11-28 02:51:27,294 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:51:27,400 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 13 [2024-11-28 02:51:27,402 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 16 treesize of output 12 [2024-11-28 02:51:27,563 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 31 proven. 280 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-11-28 02:51:27,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266549331] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:51:27,563 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:51:27,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 24, 24] total 53 [2024-11-28 02:51:27,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29887610] [2024-11-28 02:51:27,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:51:27,564 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-11-28 02:51:27,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:51:27,565 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-11-28 02:51:27,565 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=2577, Unknown=0, NotChecked=0, Total=2756 [2024-11-28 02:51:27,565 INFO L87 Difference]: Start difference. First operand 2991 states and 3231 transitions. Second operand has 53 states, 53 states have (on average 3.6226415094339623) internal successors, (192), 53 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:51:30,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:51:30,225 INFO L93 Difference]: Finished difference Result 3781 states and 4145 transitions. [2024-11-28 02:51:30,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2024-11-28 02:51:30,225 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.6226415094339623) internal successors, (192), 53 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2024-11-28 02:51:30,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:51:30,228 INFO L225 Difference]: With dead ends: 3781 [2024-11-28 02:51:30,228 INFO L226 Difference]: Without dead ends: 3610 [2024-11-28 02:51:30,229 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1311 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=367, Invalid=5953, Unknown=0, NotChecked=0, Total=6320 [2024-11-28 02:51:30,229 INFO L435 NwaCegarLoop]: 85 mSDtfsCounter, 70 mSDsluCounter, 2898 mSDsCounter, 0 mSdLazyCounter, 2554 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 2983 SdHoareTripleChecker+Invalid, 2569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 2554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-28 02:51:30,229 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 2983 Invalid, 2569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 2554 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-28 02:51:30,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3610 states. [2024-11-28 02:51:30,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3610 to 3352. [2024-11-28 02:51:30,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3352 states, 3348 states have (on average 1.0785543608124253) internal successors, (3611), 3351 states have internal predecessors, (3611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:51:30,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3352 states to 3352 states and 3611 transitions. [2024-11-28 02:51:30,256 INFO L78 Accepts]: Start accepts. Automaton has 3352 states and 3611 transitions. Word has length 130 [2024-11-28 02:51:30,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:51:30,256 INFO L471 AbstractCegarLoop]: Abstraction has 3352 states and 3611 transitions. [2024-11-28 02:51:30,256 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.6226415094339623) internal successors, (192), 53 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:51:30,256 INFO L276 IsEmpty]: Start isEmpty. Operand 3352 states and 3611 transitions. [2024-11-28 02:51:30,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2024-11-28 02:51:30,258 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:51:30,258 INFO L218 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 3, 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] [2024-11-28 02:51:30,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2024-11-28 02:51:30,458 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103,82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:51:30,459 INFO L396 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 02:51:30,459 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:51:30,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1223767954, now seen corresponding path program 14 times [2024-11-28 02:51:30,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:51:30,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540661912] [2024-11-28 02:51:30,459 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:51:30,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:51:30,500 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:51:30,501 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:51:32,965 INFO L134 CoverageAnalysis]: Checked inductivity of 604 backedges. 238 proven. 360 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:51:32,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:51:32,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540661912] [2024-11-28 02:51:32,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540661912] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:51:32,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100920372] [2024-11-28 02:51:32,966 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:51:32,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:51:32,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:51:32,968 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:51:32,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b845f9da-d9d9-4dbc-9c89-e5d5886945ac/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2024-11-28 02:51:33,659 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:51:33,659 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:51:33,664 INFO L256 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 180 conjuncts are in the unsatisfiable core [2024-11-28 02:51:33,671 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:51:33,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:51:33,680 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 13 treesize of output 7 [2024-11-28 02:51:33,686 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 10 treesize of output 8 [2024-11-28 02:51:37,635 INFO L134 CoverageAnalysis]: Checked inductivity of 604 backedges. 0 proven. 598 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:51:37,635 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:51:43,668 INFO L134 CoverageAnalysis]: Checked inductivity of 604 backedges. 0 proven. 598 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:51:43,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100920372] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:51:43,669 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:51:43,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 36, 36] total 105 [2024-11-28 02:51:43,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637762299] [2024-11-28 02:51:43,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:51:43,669 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2024-11-28 02:51:43,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:51:43,670 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2024-11-28 02:51:43,670 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=923, Invalid=10207, Unknown=0, NotChecked=0, Total=11130 [2024-11-28 02:51:43,671 INFO L87 Difference]: Start difference. First operand 3352 states and 3611 transitions. Second operand has 106 states, 105 states have (on average 3.6) internal successors, (378), 106 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)