./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/verifythis/elimination_max_rec.c --full-output --architecture 32bit
--------------------------------------------------------------------------------
Checking for memory safety (deref-memtrack)
Using default analysis
Version 527bcce2
Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d5289a-e264-47f8-8420-acc8373bd178/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d5289a-e264-47f8-8420-acc8373bd178/bin/uautomizer-verify-bycVGegfSx/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d5289a-e264-47f8-8420-acc8373bd178/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d5289a-e264-47f8-8420-acc8373bd178/bin/uautomizer-verify-bycVGegfSx/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/verifythis/elimination_max_rec.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d5289a-e264-47f8-8420-acc8373bd178/bin/uautomizer-verify-bycVGegfSx/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d5289a-e264-47f8-8420-acc8373bd178/bin/uautomizer-verify-bycVGegfSx --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 1d89bfe4b4c4586e423a8e3ebdbb120ac074219803de53807cd9f075553c6e3a
--- Real Ultimate output ---
This is Ultimate 0.2.3-dev-527bcce
[2023-11-21 22:21:19,200 INFO L188 SettingsManager]: Resetting all preferences to default values...
[2023-11-21 22:21:19,303 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d5289a-e264-47f8-8420-acc8373bd178/bin/uautomizer-verify-bycVGegfSx/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf
[2023-11-21 22:21:19,308 WARN L101 SettingsManager]: Preference file contains the following unknown settings:
[2023-11-21 22:21:19,309 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2023-11-21 22:21:19,335 INFO L130 SettingsManager]: Preferences different from defaults after loading the file:
[2023-11-21 22:21:19,336 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-11-21 22:21:19,337 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-11-21 22:21:19,337 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-11-21 22:21:19,338 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-11-21 22:21:19,339 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2023-11-21 22:21:19,339 INFO L153 SettingsManager]: * Create parallel compositions if possible=false
[2023-11-21 22:21:19,340 INFO L153 SettingsManager]: * Use SBE=true
[2023-11-21 22:21:19,340 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-11-21 22:21:19,341 INFO L153 SettingsManager]: * sizeof long=4
[2023-11-21 22:21:19,342 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true
[2023-11-21 22:21:19,342 INFO L153 SettingsManager]: * sizeof POINTER=4
[2023-11-21 22:21:19,342 INFO L153 SettingsManager]: * Check division by zero=IGNORE
[2023-11-21 22:21:19,343 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true
[2023-11-21 22:21:19,343 INFO L153 SettingsManager]: * Bitprecise bitfields=true
[2023-11-21 22:21:19,344 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true
[2023-11-21 22:21:19,344 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-11-21 22:21:19,345 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true
[2023-11-21 22:21:19,345 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false
[2023-11-21 22:21:19,346 INFO L153 SettingsManager]: * sizeof long double=12
[2023-11-21 22:21:19,346 INFO L153 SettingsManager]: * Use constant arrays=true
[2023-11-21 22:21:19,347 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-11-21 22:21:19,347 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements
[2023-11-21 22:21:19,347 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true
[2023-11-21 22:21:19,348 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode
[2023-11-21 22:21:19,348 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-11-21 22:21:19,349 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-11-21 22:21:19,349 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP
[2023-11-21 22:21:19,349 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL
[2023-11-21 22:21:19,350 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-11-21 22:21:19,350 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false
[2023-11-21 22:21:19,351 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET
[2023-11-21 22:21:19,351 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO
[2023-11-21 22:21:19,351 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode
[2023-11-21 22:21:19,352 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d5289a-e264-47f8-8420-acc8373bd178/bin/uautomizer-verify-bycVGegfSx/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int)
WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d5289a-e264-47f8-8420-acc8373bd178/bin/uautomizer-verify-bycVGegfSx
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) )
CHECK( init(main()), LTL(G valid-deref) )
CHECK( init(main()), LTL(G valid-memtrack) )
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1d89bfe4b4c4586e423a8e3ebdbb120ac074219803de53807cd9f075553c6e3a
[2023-11-21 22:21:19,696 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp
[2023-11-21 22:21:19,720 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-11-21 22:21:19,724 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-11-21 22:21:19,726 INFO L270 PluginConnector]: Initializing CDTParser...
[2023-11-21 22:21:19,726 INFO L274 PluginConnector]: CDTParser initialized
[2023-11-21 22:21:19,727 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d5289a-e264-47f8-8420-acc8373bd178/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/verifythis/elimination_max_rec.c
[2023-11-21 22:21:22,867 INFO L533 CDTParser]: Created temporary CDT project at NULL
[2023-11-21 22:21:23,136 INFO L384 CDTParser]: Found 1 translation units.
[2023-11-21 22:21:23,137 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d5289a-e264-47f8-8420-acc8373bd178/sv-benchmarks/c/verifythis/elimination_max_rec.c
[2023-11-21 22:21:23,146 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d5289a-e264-47f8-8420-acc8373bd178/bin/uautomizer-verify-bycVGegfSx/data/1738c3645/969897969f26474db0ec9a6002c92241/FLAG86422b557
[2023-11-21 22:21:23,164 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d5289a-e264-47f8-8420-acc8373bd178/bin/uautomizer-verify-bycVGegfSx/data/1738c3645/969897969f26474db0ec9a6002c92241
[2023-11-21 22:21:23,174 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-11-21 22:21:23,176 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements.
[2023-11-21 22:21:23,179 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-11-21 22:21:23,180 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-11-21 22:21:23,185 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized
[2023-11-21 22:21:23,186 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:21:23" (1/1) ...
[2023-11-21 22:21:23,187 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74ed334e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:21:23, skipping insertion in model container
[2023-11-21 22:21:23,187 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:21:23" (1/1) ...
[2023-11-21 22:21:23,212 INFO L177 MainTranslator]: Built tables and reachable declarations
[2023-11-21 22:21:23,420 INFO L209 PostProcessor]: Analyzing one entry point: main
[2023-11-21 22:21:23,431 INFO L202 MainTranslator]: Completed pre-run
[2023-11-21 22:21:23,452 INFO L209 PostProcessor]: Analyzing one entry point: main
[2023-11-21 22:21:23,472 INFO L206 MainTranslator]: Completed translation
[2023-11-21 22:21:23,473 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:21:23 WrapperNode
[2023-11-21 22:21:23,473 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-11-21 22:21:23,474 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2023-11-21 22:21:23,474 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner...
[2023-11-21 22:21:23,475 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized
[2023-11-21 22:21:23,481 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:21:23" (1/1) ...
[2023-11-21 22:21:23,489 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:21:23" (1/1) ...
[2023-11-21 22:21:23,508 INFO L138 Inliner]: procedures = 19, calls = 21, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 33
[2023-11-21 22:21:23,508 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2023-11-21 22:21:23,509 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-11-21 22:21:23,509 INFO L270 PluginConnector]: Initializing Boogie Preprocessor...
[2023-11-21 22:21:23,510 INFO L274 PluginConnector]: Boogie Preprocessor initialized
[2023-11-21 22:21:23,518 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:21:23" (1/1) ...
[2023-11-21 22:21:23,518 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:21:23" (1/1) ...
[2023-11-21 22:21:23,521 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:21:23" (1/1) ...
[2023-11-21 22:21:23,521 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:21:23" (1/1) ...
[2023-11-21 22:21:23,541 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:21:23" (1/1) ...
[2023-11-21 22:21:23,543 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:21:23" (1/1) ...
[2023-11-21 22:21:23,544 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:21:23" (1/1) ...
[2023-11-21 22:21:23,546 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:21:23" (1/1) ...
[2023-11-21 22:21:23,560 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-11-21 22:21:23,561 INFO L112 PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-11-21 22:21:23,561 INFO L270 PluginConnector]: Initializing RCFGBuilder...
[2023-11-21 22:21:23,562 INFO L274 PluginConnector]: RCFGBuilder initialized
[2023-11-21 22:21:23,563 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:21:23" (1/1) ...
[2023-11-21 22:21:23,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-11-21 22:21:23,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d5289a-e264-47f8-8420-acc8373bd178/bin/uautomizer-verify-bycVGegfSx/z3
[2023-11-21 22:21:23,605 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d5289a-e264-47f8-8420-acc8373bd178/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2023-11-21 22:21:23,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d5289a-e264-47f8-8420-acc8373bd178/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2023-11-21 22:21:23,642 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-11-21 22:21:23,643 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2023-11-21 22:21:23,643 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2023-11-21 22:21:23,643 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int
[2023-11-21 22:21:23,644 INFO L130 BoogieDeclarations]: Found specification of procedure check
[2023-11-21 22:21:23,644 INFO L138 BoogieDeclarations]: Found implementation of procedure check
[2023-11-21 22:21:23,644 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap
[2023-11-21 22:21:23,644 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-11-21 22:21:23,645 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-11-21 22:21:23,645 INFO L130 BoogieDeclarations]: Found specification of procedure read~int
[2023-11-21 22:21:23,645 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2023-11-21 22:21:23,645 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2023-11-21 22:21:23,645 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2023-11-21 22:21:23,745 INFO L240 CfgBuilder]: Building ICFG
[2023-11-21 22:21:23,748 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation
[2023-11-21 22:21:23,970 INFO L281 CfgBuilder]: Performing block encoding
[2023-11-21 22:21:24,050 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-11-21 22:21:24,062 INFO L308 CfgBuilder]: Removed 0 assume(true) statements.
[2023-11-21 22:21:24,064 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:21:24 BoogieIcfgContainer
[2023-11-21 22:21:24,064 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-11-21 22:21:24,067 INFO L112 PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-11-21 22:21:24,069 INFO L270 PluginConnector]: Initializing TraceAbstraction...
[2023-11-21 22:21:24,072 INFO L274 PluginConnector]: TraceAbstraction initialized
[2023-11-21 22:21:24,072 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 10:21:23" (1/3) ...
[2023-11-21 22:21:24,073 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60bde5fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:21:24, skipping insertion in model container
[2023-11-21 22:21:24,073 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:21:23" (2/3) ...
[2023-11-21 22:21:24,075 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60bde5fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:21:24, skipping insertion in model container
[2023-11-21 22:21:24,076 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:21:24" (3/3) ...
[2023-11-21 22:21:24,077 INFO L112 eAbstractionObserver]: Analyzing ICFG elimination_max_rec.c
[2023-11-21 22:21:24,093 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-11-21 22:21:24,093 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations.
[2023-11-21 22:21:24,137 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-11-21 22:21:24,144 INFO L357 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, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@6222ff9b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2023-11-21 22:21:24,150 INFO L358 AbstractCegarLoop]: Starting to check reachability of 13 error locations.
[2023-11-21 22:21:24,155 INFO L276 IsEmpty]: Start isEmpty. Operand has 45 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 35 states have internal predecessors, (37), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6)
[2023-11-21 22:21:24,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13
[2023-11-21 22:21:24,168 INFO L187 NwaCegarLoop]: Found error trace
[2023-11-21 22:21:24,169 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-21 22:21:24,170 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] ===
[2023-11-21 22:21:24,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier
[2023-11-21 22:21:24,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1598295020, now seen corresponding path program 1 times
[2023-11-21 22:21:24,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-21 22:21:24,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626652433]
[2023-11-21 22:21:24,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-21 22:21:24,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-21 22:21:24,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-21 22:21:24,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1
[2023-11-21 22:21:24,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-21 22:21:24,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-21 22:21:24,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-21 22:21:24,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626652433]
[2023-11-21 22:21:24,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626652433] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-21 22:21:24,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-21 22:21:24,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2023-11-21 22:21:24,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147132567]
[2023-11-21 22:21:24,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-21 22:21:24,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2023-11-21 22:21:24,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-21 22:21:24,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2023-11-21 22:21:24,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2023-11-21 22:21:24,831 INFO L87 Difference]: Start difference. First operand has 45 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 35 states have internal predecessors, (37), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2023-11-21 22:21:25,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-21 22:21:25,020 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions.
[2023-11-21 22:21:25,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states.
[2023-11-21 22:21:25,022 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12
[2023-11-21 22:21:25,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-21 22:21:25,031 INFO L225 Difference]: With dead ends: 74
[2023-11-21 22:21:25,032 INFO L226 Difference]: Without dead ends: 73
[2023-11-21 22:21:25,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56
[2023-11-21 22:21:25,037 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 34 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-21 22:21:25,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 151 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-21 22:21:25,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states.
[2023-11-21 22:21:25,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 63.
[2023-11-21 22:21:25,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 47 states have internal predecessors, (57), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10)
[2023-11-21 22:21:25,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 77 transitions.
[2023-11-21 22:21:25,083 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 77 transitions. Word has length 12
[2023-11-21 22:21:25,084 INFO L84 Accepts]: Finished accepts. word is rejected.
[2023-11-21 22:21:25,084 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 77 transitions.
[2023-11-21 22:21:25,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2023-11-21 22:21:25,084 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 77 transitions.
[2023-11-21 22:21:25,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13
[2023-11-21 22:21:25,086 INFO L187 NwaCegarLoop]: Found error trace
[2023-11-21 22:21:25,086 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-21 22:21:25,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-11-21 22:21:25,087 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] ===
[2023-11-21 22:21:25,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier
[2023-11-21 22:21:25,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1596877707, now seen corresponding path program 1 times
[2023-11-21 22:21:25,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-21 22:21:25,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59166398]
[2023-11-21 22:21:25,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-21 22:21:25,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-21 22:21:25,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-21 22:21:25,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1
[2023-11-21 22:21:25,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-21 22:21:25,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5
[2023-11-21 22:21:25,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-21 22:21:25,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-21 22:21:25,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-21 22:21:25,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59166398]
[2023-11-21 22:21:25,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59166398] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-21 22:21:25,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-21 22:21:25,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2023-11-21 22:21:25,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920198052]
[2023-11-21 22:21:25,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-21 22:21:25,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-21 22:21:25,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-21 22:21:25,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-21 22:21:25,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-21 22:21:25,161 INFO L87 Difference]: Start difference. First operand 63 states and 77 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2023-11-21 22:21:25,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-21 22:21:25,198 INFO L93 Difference]: Finished difference Result 62 states and 76 transitions.
[2023-11-21 22:21:25,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states.
[2023-11-21 22:21:25,200 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 12
[2023-11-21 22:21:25,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-21 22:21:25,202 INFO L225 Difference]: With dead ends: 62
[2023-11-21 22:21:25,202 INFO L226 Difference]: Without dead ends: 62
[2023-11-21 22:21:25,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-21 22:21:25,204 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 6 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-21 22:21:25,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 71 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-21 22:21:25,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states.
[2023-11-21 22:21:25,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62.
[2023-11-21 22:21:25,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 35 states have (on average 1.6) internal successors, (56), 46 states have internal predecessors, (56), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10)
[2023-11-21 22:21:25,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 76 transitions.
[2023-11-21 22:21:25,218 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 76 transitions. Word has length 12
[2023-11-21 22:21:25,218 INFO L84 Accepts]: Finished accepts. word is rejected.
[2023-11-21 22:21:25,218 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 76 transitions.
[2023-11-21 22:21:25,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2023-11-21 22:21:25,219 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 76 transitions.
[2023-11-21 22:21:25,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14
[2023-11-21 22:21:25,219 INFO L187 NwaCegarLoop]: Found error trace
[2023-11-21 22:21:25,220 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-21 22:21:25,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-11-21 22:21:25,220 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] ===
[2023-11-21 22:21:25,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier
[2023-11-21 22:21:25,221 INFO L85 PathProgramCache]: Analyzing trace with hash -2036398593, now seen corresponding path program 1 times
[2023-11-21 22:21:25,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-21 22:21:25,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128504918]
[2023-11-21 22:21:25,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-21 22:21:25,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-21 22:21:25,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-21 22:21:25,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1
[2023-11-21 22:21:25,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-21 22:21:25,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5
[2023-11-21 22:21:25,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-21 22:21:25,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-21 22:21:25,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-21 22:21:25,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128504918]
[2023-11-21 22:21:25,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128504918] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-21 22:21:25,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-21 22:21:25,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2023-11-21 22:21:25,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821641745]
[2023-11-21 22:21:25,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-21 22:21:25,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-21 22:21:25,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-21 22:21:25,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-21 22:21:25,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-21 22:21:25,348 INFO L87 Difference]: Start difference. First operand 62 states and 76 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2023-11-21 22:21:25,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-21 22:21:25,371 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions.
[2023-11-21 22:21:25,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states.
[2023-11-21 22:21:25,372 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), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 13
[2023-11-21 22:21:25,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-21 22:21:25,374 INFO L225 Difference]: With dead ends: 61
[2023-11-21 22:21:25,374 INFO L226 Difference]: Without dead ends: 61
[2023-11-21 22:21:25,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-21 22:21:25,376 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 4 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 67 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
[2023-11-21 22:21:25,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 67 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-21 22:21:25,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states.
[2023-11-21 22:21:25,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61.
[2023-11-21 22:21:25,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 45 states have internal predecessors, (55), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10)
[2023-11-21 22:21:25,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 75 transitions.
[2023-11-21 22:21:25,387 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 75 transitions. Word has length 13
[2023-11-21 22:21:25,388 INFO L84 Accepts]: Finished accepts. word is rejected.
[2023-11-21 22:21:25,388 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 75 transitions.
[2023-11-21 22:21:25,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2023-11-21 22:21:25,388 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 75 transitions.
[2023-11-21 22:21:25,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15
[2023-11-21 22:21:25,389 INFO L187 NwaCegarLoop]: Found error trace
[2023-11-21 22:21:25,389 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-21 22:21:25,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2023-11-21 22:21:25,390 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] ===
[2023-11-21 22:21:25,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier
[2023-11-21 22:21:25,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1296153101, now seen corresponding path program 1 times
[2023-11-21 22:21:25,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-21 22:21:25,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29611035]
[2023-11-21 22:21:25,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-21 22:21:25,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-21 22:21:25,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-21 22:21:25,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1
[2023-11-21 22:21:25,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-21 22:21:25,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5
[2023-11-21 22:21:25,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-21 22:21:25,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-21 22:21:25,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-21 22:21:25,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29611035]
[2023-11-21 22:21:25,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29611035] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-21 22:21:25,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-21 22:21:25,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2023-11-21 22:21:25,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674502890]
[2023-11-21 22:21:25,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-21 22:21:25,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-21 22:21:25,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-21 22:21:25,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-21 22:21:25,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-21 22:21:25,467 INFO L87 Difference]: Start difference. First operand 61 states and 75 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2023-11-21 22:21:25,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-21 22:21:25,517 INFO L93 Difference]: Finished difference Result 60 states and 74 transitions.
[2023-11-21 22:21:25,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states.
[2023-11-21 22:21:25,518 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 14
[2023-11-21 22:21:25,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-21 22:21:25,521 INFO L225 Difference]: With dead ends: 60
[2023-11-21 22:21:25,521 INFO L226 Difference]: Without dead ends: 60
[2023-11-21 22:21:25,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-21 22:21:25,523 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-21 22:21:25,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 62 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-21 22:21:25,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states.
[2023-11-21 22:21:25,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60.
[2023-11-21 22:21:25,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 35 states have (on average 1.542857142857143) internal successors, (54), 44 states have internal predecessors, (54), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10)
[2023-11-21 22:21:25,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 74 transitions.
[2023-11-21 22:21:25,537 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 74 transitions. Word has length 14
[2023-11-21 22:21:25,537 INFO L84 Accepts]: Finished accepts. word is rejected.
[2023-11-21 22:21:25,537 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 74 transitions.
[2023-11-21 22:21:25,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2023-11-21 22:21:25,538 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 74 transitions.
[2023-11-21 22:21:25,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16
[2023-11-21 22:21:25,539 INFO L187 NwaCegarLoop]: Found error trace
[2023-11-21 22:21:25,539 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-21 22:21:25,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2023-11-21 22:21:25,540 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting checkErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] ===
[2023-11-21 22:21:25,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier
[2023-11-21 22:21:25,542 INFO L85 PathProgramCache]: Analyzing trace with hash 805322082, now seen corresponding path program 1 times
[2023-11-21 22:21:25,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-21 22:21:25,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013430019]
[2023-11-21 22:21:25,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-21 22:21:25,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-21 22:21:25,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-21 22:21:25,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1
[2023-11-21 22:21:25,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-21 22:21:25,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8
[2023-11-21 22:21:25,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-21 22:21:25,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-21 22:21:25,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-21 22:21:25,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013430019]
[2023-11-21 22:21:25,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013430019] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-21 22:21:25,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-21 22:21:25,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-21 22:21:25,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752590939]
[2023-11-21 22:21:25,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-21 22:21:25,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-21 22:21:25,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-21 22:21:25,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-21 22:21:25,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2023-11-21 22:21:25,713 INFO L87 Difference]: Start difference. First operand 60 states and 74 transitions. Second operand has 5 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2023-11-21 22:21:25,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-21 22:21:25,821 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions.
[2023-11-21 22:21:25,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states.
[2023-11-21 22:21:25,822 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15
[2023-11-21 22:21:25,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-21 22:21:25,824 INFO L225 Difference]: With dead ends: 56
[2023-11-21 22:21:25,824 INFO L226 Difference]: Without dead ends: 56
[2023-11-21 22:21:25,825 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2023-11-21 22:21:25,828 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 30 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-21 22:21:25,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 55 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-21 22:21:25,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states.
[2023-11-21 22:21:25,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56.
[2023-11-21 22:21:25,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 40 states have internal predecessors, (46), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10)
[2023-11-21 22:21:25,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions.
[2023-11-21 22:21:25,853 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 15
[2023-11-21 22:21:25,853 INFO L84 Accepts]: Finished accepts. word is rejected.
[2023-11-21 22:21:25,853 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions.
[2023-11-21 22:21:25,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2023-11-21 22:21:25,854 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions.
[2023-11-21 22:21:25,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16
[2023-11-21 22:21:25,854 INFO L187 NwaCegarLoop]: Found error trace
[2023-11-21 22:21:25,855 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-21 22:21:25,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2023-11-21 22:21:25,855 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting checkErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] ===
[2023-11-21 22:21:25,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier
[2023-11-21 22:21:25,856 INFO L85 PathProgramCache]: Analyzing trace with hash 805322083, now seen corresponding path program 1 times
[2023-11-21 22:21:25,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-21 22:21:25,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198771851]
[2023-11-21 22:21:25,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-21 22:21:25,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-21 22:21:25,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-21 22:21:26,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1
[2023-11-21 22:21:26,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-21 22:21:26,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8
[2023-11-21 22:21:26,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-21 22:21:26,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-21 22:21:26,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-21 22:21:26,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198771851]
[2023-11-21 22:21:26,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198771851] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-21 22:21:26,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-21 22:21:26,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-21 22:21:26,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122811383]
[2023-11-21 22:21:26,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-21 22:21:26,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-21 22:21:26,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-21 22:21:26,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-21 22:21:26,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2023-11-21 22:21:26,268 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand has 8 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2023-11-21 22:21:26,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-21 22:21:26,466 INFO L93 Difference]: Finished difference Result 61 states and 67 transitions.
[2023-11-21 22:21:26,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states.
[2023-11-21 22:21:26,467 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15
[2023-11-21 22:21:26,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-21 22:21:26,468 INFO L225 Difference]: With dead ends: 61
[2023-11-21 22:21:26,468 INFO L226 Difference]: Without dead ends: 61
[2023-11-21 22:21:26,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90
[2023-11-21 22:21:26,469 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 33 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-21 22:21:26,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 96 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-21 22:21:26,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states.
[2023-11-21 22:21:26,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 56.
[2023-11-21 22:21:26,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 40 states have internal predecessors, (45), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10)
[2023-11-21 22:21:26,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 65 transitions.
[2023-11-21 22:21:26,477 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 65 transitions. Word has length 15
[2023-11-21 22:21:26,477 INFO L84 Accepts]: Finished accepts. word is rejected.
[2023-11-21 22:21:26,477 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 65 transitions.
[2023-11-21 22:21:26,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2023-11-21 22:21:26,478 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 65 transitions.
[2023-11-21 22:21:26,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16
[2023-11-21 22:21:26,479 INFO L187 NwaCegarLoop]: Found error trace
[2023-11-21 22:21:26,479 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-21 22:21:26,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5
[2023-11-21 22:21:26,479 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] ===
[2023-11-21 22:21:26,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier
[2023-11-21 22:21:26,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1526040514, now seen corresponding path program 1 times
[2023-11-21 22:21:26,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-21 22:21:26,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244948174]
[2023-11-21 22:21:26,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-21 22:21:26,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-21 22:21:26,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-21 22:21:26,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1
[2023-11-21 22:21:26,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-21 22:21:26,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5
[2023-11-21 22:21:26,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-21 22:21:26,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-21 22:21:26,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-21 22:21:26,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244948174]
[2023-11-21 22:21:26,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244948174] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-21 22:21:26,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-21 22:21:26,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-21 22:21:26,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311333137]
[2023-11-21 22:21:26,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-21 22:21:26,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-21 22:21:26,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-21 22:21:26,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-21 22:21:26,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-21 22:21:26,583 INFO L87 Difference]: Start difference. First operand 56 states and 65 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2023-11-21 22:21:26,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-21 22:21:26,619 INFO L93 Difference]: Finished difference Result 55 states and 64 transitions.
[2023-11-21 22:21:26,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states.
[2023-11-21 22:21:26,620 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15
[2023-11-21 22:21:26,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-21 22:21:26,621 INFO L225 Difference]: With dead ends: 55
[2023-11-21 22:21:26,621 INFO L226 Difference]: Without dead ends: 47
[2023-11-21 22:21:26,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2023-11-21 22:21:26,622 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 0 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-21 22:21:26,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 81 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-21 22:21:26,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states.
[2023-11-21 22:21:26,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47.
[2023-11-21 22:21:26,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 33 states have internal predecessors, (37), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8)
[2023-11-21 22:21:26,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions.
[2023-11-21 22:21:26,629 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 15
[2023-11-21 22:21:26,629 INFO L84 Accepts]: Finished accepts. word is rejected.
[2023-11-21 22:21:26,629 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions.
[2023-11-21 22:21:26,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2023-11-21 22:21:26,629 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions.
[2023-11-21 22:21:26,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17
[2023-11-21 22:21:26,630 INFO L187 NwaCegarLoop]: Found error trace
[2023-11-21 22:21:26,630 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-21 22:21:26,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6
[2023-11-21 22:21:26,631 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting checkErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] ===
[2023-11-21 22:21:26,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier
[2023-11-21 22:21:26,631 INFO L85 PathProgramCache]: Analyzing trace with hash -804819226, now seen corresponding path program 1 times
[2023-11-21 22:21:26,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-21 22:21:26,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932376303]
[2023-11-21 22:21:26,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-21 22:21:26,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-21 22:21:26,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-21 22:21:26,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1
[2023-11-21 22:21:26,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-21 22:21:26,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8
[2023-11-21 22:21:26,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-21 22:21:26,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-21 22:21:26,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-21 22:21:26,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932376303]
[2023-11-21 22:21:26,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932376303] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-21 22:21:26,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-21 22:21:26,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-11-21 22:21:26,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587888081]
[2023-11-21 22:21:26,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-21 22:21:26,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states
[2023-11-21 22:21:26,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-21 22:21:26,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2023-11-21 22:21:26,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72
[2023-11-21 22:21:26,901 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 9 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 states have internal predecessors, (11), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2023-11-21 22:21:27,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-21 22:21:27,071 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions.
[2023-11-21 22:21:27,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states.
[2023-11-21 22:21:27,072 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 states have internal predecessors, (11), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16
[2023-11-21 22:21:27,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-21 22:21:27,073 INFO L225 Difference]: With dead ends: 49
[2023-11-21 22:21:27,073 INFO L226 Difference]: Without dead ends: 49
[2023-11-21 22:21:27,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110
[2023-11-21 22:21:27,074 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 12 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-21 22:21:27,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 93 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-21 22:21:27,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states.
[2023-11-21 22:21:27,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47.
[2023-11-21 22:21:27,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 33 states have internal predecessors, (36), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8)
[2023-11-21 22:21:27,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions.
[2023-11-21 22:21:27,079 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 16
[2023-11-21 22:21:27,079 INFO L84 Accepts]: Finished accepts. word is rejected.
[2023-11-21 22:21:27,080 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions.
[2023-11-21 22:21:27,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 states have internal predecessors, (11), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2023-11-21 22:21:27,080 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions.
[2023-11-21 22:21:27,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24
[2023-11-21 22:21:27,081 INFO L187 NwaCegarLoop]: Found error trace
[2023-11-21 22:21:27,081 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-21 22:21:27,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7
[2023-11-21 22:21:27,081 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] ===
[2023-11-21 22:21:27,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier
[2023-11-21 22:21:27,082 INFO L85 PathProgramCache]: Analyzing trace with hash 522255046, now seen corresponding path program 1 times
[2023-11-21 22:21:27,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-21 22:21:27,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019819376]
[2023-11-21 22:21:27,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-21 22:21:27,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-21 22:21:27,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-21 22:21:27,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1
[2023-11-21 22:21:27,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-21 22:21:27,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8
[2023-11-21 22:21:27,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-21 22:21:27,434 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-21 22:21:27,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-21 22:21:27,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019819376]
[2023-11-21 22:21:27,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019819376] provided 0 perfect and 1 imperfect interpolant sequences
[2023-11-21 22:21:27,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931456810]
[2023-11-21 22:21:27,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-21 22:21:27,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-21 22:21:27,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d5289a-e264-47f8-8420-acc8373bd178/bin/uautomizer-verify-bycVGegfSx/z3
[2023-11-21 22:21:27,439 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d5289a-e264-47f8-8420-acc8373bd178/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-21 22:21:27,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d5289a-e264-47f8-8420-acc8373bd178/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2023-11-21 22:21:27,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-21 22:21:27,530 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core
[2023-11-21 22:21:27,536 INFO L285 TraceCheckSpWp]: Computing forward predicates...
[2023-11-21 22:21:27,763 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 49 treesize of output 33
[2023-11-21 22:21:28,087 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-21 22:21:28,087 INFO L327 TraceCheckSpWp]: Computing backward predicates...
[2023-11-21 22:21:28,211 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 55 treesize of output 39
[2023-11-21 22:21:28,318 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-21 22:21:28,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931456810] provided 0 perfect and 2 imperfect interpolant sequences
[2023-11-21 22:21:28,318 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2023-11-21 22:21:28,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 7] total 18
[2023-11-21 22:21:28,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792271752]
[2023-11-21 22:21:28,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2023-11-21 22:21:28,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states
[2023-11-21 22:21:28,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-21 22:21:28,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants.
[2023-11-21 22:21:28,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306
[2023-11-21 22:21:28,320 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand has 18 states, 17 states have (on average 2.0) internal successors, (34), 13 states have internal predecessors, (34), 6 states have call successors, (13), 7 states have call predecessors, (13), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4)
[2023-11-21 22:21:28,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-21 22:21:28,691 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions.
[2023-11-21 22:21:28,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states.
[2023-11-21 22:21:28,692 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 13 states have internal predecessors, (34), 6 states have call successors, (13), 7 states have call predecessors, (13), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 23
[2023-11-21 22:21:28,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-21 22:21:28,693 INFO L225 Difference]: With dead ends: 53
[2023-11-21 22:21:28,693 INFO L226 Difference]: Without dead ends: 53
[2023-11-21 22:21:28,693 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552
[2023-11-21 22:21:28,694 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 84 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2023-11-21 22:21:28,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 169 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2023-11-21 22:21:28,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states.
[2023-11-21 22:21:28,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51.
[2023-11-21 22:21:28,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 36 states have internal predecessors, (39), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8)
[2023-11-21 22:21:28,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions.
[2023-11-21 22:21:28,698 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 23
[2023-11-21 22:21:28,699 INFO L84 Accepts]: Finished accepts. word is rejected.
[2023-11-21 22:21:28,699 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions.
[2023-11-21 22:21:28,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 13 states have internal predecessors, (34), 6 states have call successors, (13), 7 states have call predecessors, (13), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4)
[2023-11-21 22:21:28,699 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions.
[2023-11-21 22:21:28,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27
[2023-11-21 22:21:28,700 INFO L187 NwaCegarLoop]: Found error trace
[2023-11-21 22:21:28,700 INFO L195 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]
[2023-11-21 22:21:28,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d5289a-e264-47f8-8420-acc8373bd178/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2023-11-21 22:21:28,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d5289a-e264-47f8-8420-acc8373bd178/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-21 22:21:28,915 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting checkErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] ===
[2023-11-21 22:21:28,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier
[2023-11-21 22:21:28,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1287196587, now seen corresponding path program 1 times
[2023-11-21 22:21:28,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-21 22:21:28,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139582570]
[2023-11-21 22:21:28,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-21 22:21:28,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-21 22:21:28,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-21 22:21:29,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1
[2023-11-21 22:21:29,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-21 22:21:29,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8
[2023-11-21 22:21:29,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-21 22:21:29,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16
[2023-11-21 22:21:29,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-21 22:21:29,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22
[2023-11-21 22:21:29,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-21 22:21:29,200 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2023-11-21 22:21:29,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-21 22:21:29,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139582570]
[2023-11-21 22:21:29,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139582570] provided 0 perfect and 1 imperfect interpolant sequences
[2023-11-21 22:21:29,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141699535]
[2023-11-21 22:21:29,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-21 22:21:29,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-21 22:21:29,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d5289a-e264-47f8-8420-acc8373bd178/bin/uautomizer-verify-bycVGegfSx/z3
[2023-11-21 22:21:29,202 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d5289a-e264-47f8-8420-acc8373bd178/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-21 22:21:29,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d5289a-e264-47f8-8420-acc8373bd178/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2023-11-21 22:21:29,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-21 22:21:29,329 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core
[2023-11-21 22:21:29,332 INFO L285 TraceCheckSpWp]: Computing forward predicates...
[2023-11-21 22:21:29,514 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2023-11-21 22:21:29,514 INFO L327 TraceCheckSpWp]: Computing backward predicates...
[2023-11-21 22:21:29,797 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 38 treesize of output 34
[2023-11-21 22:21:29,914 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2023-11-21 22:21:29,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141699535] provided 0 perfect and 2 imperfect interpolant sequences
[2023-11-21 22:21:29,915 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2023-11-21 22:21:29,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19
[2023-11-21 22:21:29,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285160413]
[2023-11-21 22:21:29,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2023-11-21 22:21:29,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states
[2023-11-21 22:21:29,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-21 22:21:29,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants.
[2023-11-21 22:21:29,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380
[2023-11-21 22:21:29,919 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 20 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 9 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (10), 10 states have call predecessors, (10), 7 states have call successors, (10)
[2023-11-21 22:21:30,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-21 22:21:30,344 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions.
[2023-11-21 22:21:30,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states.
[2023-11-21 22:21:30,345 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 9 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (10), 10 states have call predecessors, (10), 7 states have call successors, (10) Word has length 26
[2023-11-21 22:21:30,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-21 22:21:30,346 INFO L225 Difference]: With dead ends: 53
[2023-11-21 22:21:30,346 INFO L226 Difference]: Without dead ends: 53
[2023-11-21 22:21:30,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756
[2023-11-21 22:21:30,348 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 75 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2023-11-21 22:21:30,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 181 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2023-11-21 22:21:30,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states.
[2023-11-21 22:21:30,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50.
[2023-11-21 22:21:30,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 35 states have internal predecessors, (37), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8)
[2023-11-21 22:21:30,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions.
[2023-11-21 22:21:30,352 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 26
[2023-11-21 22:21:30,353 INFO L84 Accepts]: Finished accepts. word is rejected.
[2023-11-21 22:21:30,353 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions.
[2023-11-21 22:21:30,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 9 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (10), 10 states have call predecessors, (10), 7 states have call successors, (10)
[2023-11-21 22:21:30,353 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions.
[2023-11-21 22:21:30,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27
[2023-11-21 22:21:30,354 INFO L187 NwaCegarLoop]: Found error trace
[2023-11-21 22:21:30,354 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-21 22:21:30,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d5289a-e264-47f8-8420-acc8373bd178/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0
[2023-11-21 22:21:30,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d5289a-e264-47f8-8420-acc8373bd178/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9
[2023-11-21 22:21:30,575 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting checkErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] ===
[2023-11-21 22:21:30,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier
[2023-11-21 22:21:30,575 INFO L85 PathProgramCache]: Analyzing trace with hash 2134353993, now seen corresponding path program 1 times
[2023-11-21 22:21:30,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-21 22:21:30,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694913534]
[2023-11-21 22:21:30,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-21 22:21:30,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-21 22:21:30,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-21 22:21:30,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1
[2023-11-21 22:21:30,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-21 22:21:30,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8
[2023-11-21 22:21:30,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-21 22:21:31,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19
[2023-11-21 22:21:31,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-21 22:21:31,012 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2023-11-21 22:21:31,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-21 22:21:31,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694913534]
[2023-11-21 22:21:31,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694913534] provided 0 perfect and 1 imperfect interpolant sequences
[2023-11-21 22:21:31,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353607733]
[2023-11-21 22:21:31,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-21 22:21:31,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-21 22:21:31,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d5289a-e264-47f8-8420-acc8373bd178/bin/uautomizer-verify-bycVGegfSx/z3
[2023-11-21 22:21:31,014 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d5289a-e264-47f8-8420-acc8373bd178/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-21 22:21:31,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d5289a-e264-47f8-8420-acc8373bd178/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2023-11-21 22:21:31,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-21 22:21:31,089 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 29 conjunts are in the unsatisfiable core
[2023-11-21 22:21:31,093 INFO L285 TraceCheckSpWp]: Computing forward predicates...
[2023-11-21 22:21:31,169 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 49 treesize of output 33
[2023-11-21 22:21:31,326 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2023-11-21 22:21:31,326 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-21 22:21:31,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353607733] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-21 22:21:31,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-21 22:21:31,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [8] total 17
[2023-11-21 22:21:31,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891570995]
[2023-11-21 22:21:31,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-21 22:21:31,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states
[2023-11-21 22:21:31,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-21 22:21:31,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2023-11-21 22:21:31,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306
[2023-11-21 22:21:31,329 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand has 11 states, 8 states have (on average 2.25) internal successors, (18), 9 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3)
[2023-11-21 22:21:31,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-21 22:21:31,629 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions.
[2023-11-21 22:21:31,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states.
[2023-11-21 22:21:31,629 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 2.25) internal successors, (18), 9 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 26
[2023-11-21 22:21:31,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-21 22:21:31,630 INFO L225 Difference]: With dead ends: 49
[2023-11-21 22:21:31,630 INFO L226 Difference]: Without dead ends: 49
[2023-11-21 22:21:31,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552
[2023-11-21 22:21:31,631 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 35 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2023-11-21 22:21:31,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 130 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2023-11-21 22:21:31,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states.
[2023-11-21 22:21:31,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48.
[2023-11-21 22:21:31,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 33 states have internal predecessors, (35), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8)
[2023-11-21 22:21:31,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions.
[2023-11-21 22:21:31,635 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 26
[2023-11-21 22:21:31,635 INFO L84 Accepts]: Finished accepts. word is rejected.
[2023-11-21 22:21:31,636 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions.
[2023-11-21 22:21:31,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 2.25) internal successors, (18), 9 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3)
[2023-11-21 22:21:31,636 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions.
[2023-11-21 22:21:31,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28
[2023-11-21 22:21:31,637 INFO L187 NwaCegarLoop]: Found error trace
[2023-11-21 22:21:31,637 INFO L195 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]
[2023-11-21 22:21:31,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d5289a-e264-47f8-8420-acc8373bd178/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0
[2023-11-21 22:21:31,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d5289a-e264-47f8-8420-acc8373bd178/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10
[2023-11-21 22:21:31,853 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting checkErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] ===
[2023-11-21 22:21:31,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier
[2023-11-21 22:21:31,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1248387362, now seen corresponding path program 1 times
[2023-11-21 22:21:31,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-21 22:21:31,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172847404]
[2023-11-21 22:21:31,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-21 22:21:31,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-21 22:21:31,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-21 22:21:32,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1
[2023-11-21 22:21:32,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-21 22:21:32,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8
[2023-11-21 22:21:32,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-21 22:21:32,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16
[2023-11-21 22:21:32,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-21 22:21:32,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22
[2023-11-21 22:21:32,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-21 22:21:32,291 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2023-11-21 22:21:32,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-21 22:21:32,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172847404]
[2023-11-21 22:21:32,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172847404] provided 0 perfect and 1 imperfect interpolant sequences
[2023-11-21 22:21:32,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829119119]
[2023-11-21 22:21:32,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-21 22:21:32,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-21 22:21:32,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d5289a-e264-47f8-8420-acc8373bd178/bin/uautomizer-verify-bycVGegfSx/z3
[2023-11-21 22:21:32,293 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d5289a-e264-47f8-8420-acc8373bd178/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-21 22:21:32,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d5289a-e264-47f8-8420-acc8373bd178/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2023-11-21 22:21:32,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-21 22:21:32,374 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 23 conjunts are in the unsatisfiable core
[2023-11-21 22:21:32,377 INFO L285 TraceCheckSpWp]: Computing forward predicates...
[2023-11-21 22:21:32,521 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 49 treesize of output 33
[2023-11-21 22:21:33,017 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-21 22:21:33,017 INFO L327 TraceCheckSpWp]: Computing backward predicates...
[2023-11-21 22:21:33,390 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 55 treesize of output 39
[2023-11-21 22:21:33,400 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25
[2023-11-21 22:21:33,587 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2023-11-21 22:21:33,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829119119] provided 0 perfect and 2 imperfect interpolant sequences
[2023-11-21 22:21:33,587 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2023-11-21 22:21:33,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 29
[2023-11-21 22:21:33,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681295838]
[2023-11-21 22:21:33,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2023-11-21 22:21:33,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states
[2023-11-21 22:21:33,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-21 22:21:33,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants.
[2023-11-21 22:21:33,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870
[2023-11-21 22:21:33,590 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 30 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 24 states have internal predecessors, (41), 12 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10)
[2023-11-21 22:21:34,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-21 22:21:34,805 INFO L93 Difference]: Finished difference Result 64 states and 73 transitions.
[2023-11-21 22:21:34,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states.
[2023-11-21 22:21:34,806 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 24 states have internal predecessors, (41), 12 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 27
[2023-11-21 22:21:34,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-21 22:21:34,807 INFO L225 Difference]: With dead ends: 64
[2023-11-21 22:21:34,807 INFO L226 Difference]: Without dead ends: 64
[2023-11-21 22:21:34,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=312, Invalid=1668, Unknown=0, NotChecked=0, Total=1980
[2023-11-21 22:21:34,809 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 88 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time
[2023-11-21 22:21:34,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 273 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time]
[2023-11-21 22:21:34,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states.
[2023-11-21 22:21:34,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 58.
[2023-11-21 22:21:34,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 38 states have (on average 1.105263157894737) internal successors, (42), 39 states have internal predecessors, (42), 12 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (12), 12 states have call predecessors, (12), 10 states have call successors, (12)
[2023-11-21 22:21:34,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions.
[2023-11-21 22:21:34,815 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 27
[2023-11-21 22:21:34,815 INFO L84 Accepts]: Finished accepts. word is rejected.
[2023-11-21 22:21:34,816 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions.
[2023-11-21 22:21:34,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 24 states have internal predecessors, (41), 12 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10)
[2023-11-21 22:21:34,818 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions.
[2023-11-21 22:21:34,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32
[2023-11-21 22:21:34,821 INFO L187 NwaCegarLoop]: Found error trace
[2023-11-21 22:21:34,821 INFO L195 NwaCegarLoop]: trace histogram [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]
[2023-11-21 22:21:34,846 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d5289a-e264-47f8-8420-acc8373bd178/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0
[2023-11-21 22:21:35,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d5289a-e264-47f8-8420-acc8373bd178/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11
[2023-11-21 22:21:35,022 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] ===
[2023-11-21 22:21:35,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier
[2023-11-21 22:21:35,023 INFO L85 PathProgramCache]: Analyzing trace with hash -955795702, now seen corresponding path program 1 times
[2023-11-21 22:21:35,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-21 22:21:35,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957529141]
[2023-11-21 22:21:35,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-21 22:21:35,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-21 22:21:35,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-21 22:21:35,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1
[2023-11-21 22:21:35,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-21 22:21:35,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8
[2023-11-21 22:21:35,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-21 22:21:35,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16
[2023-11-21 22:21:35,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-21 22:21:35,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22
[2023-11-21 22:21:35,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-21 22:21:35,283 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2023-11-21 22:21:35,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-21 22:21:35,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957529141]
[2023-11-21 22:21:35,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957529141] provided 0 perfect and 1 imperfect interpolant sequences
[2023-11-21 22:21:35,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235561265]
[2023-11-21 22:21:35,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-21 22:21:35,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-21 22:21:35,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d5289a-e264-47f8-8420-acc8373bd178/bin/uautomizer-verify-bycVGegfSx/z3
[2023-11-21 22:21:35,285 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d5289a-e264-47f8-8420-acc8373bd178/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-21 22:21:35,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d5289a-e264-47f8-8420-acc8373bd178/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process
[2023-11-21 22:21:35,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-21 22:21:35,355 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 27 conjunts are in the unsatisfiable core
[2023-11-21 22:21:35,359 INFO L285 TraceCheckSpWp]: Computing forward predicates...
[2023-11-21 22:21:35,369 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6
[2023-11-21 22:21:35,650 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23
[2023-11-21 22:21:35,730 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-21 22:21:35,731 INFO L327 TraceCheckSpWp]: Computing backward predicates...
[2023-11-21 22:21:37,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235561265] provided 0 perfect and 1 imperfect interpolant sequences
[2023-11-21 22:21:37,831 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2023-11-21 22:21:37,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 19
[2023-11-21 22:21:37,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082675740]
[2023-11-21 22:21:37,832 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2023-11-21 22:21:37,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states
[2023-11-21 22:21:37,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-21 22:21:37,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants.
[2023-11-21 22:21:37,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462
[2023-11-21 22:21:37,834 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand has 19 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 7 states have call successors, (11), 6 states have call predecessors, (11), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7)
[2023-11-21 22:21:38,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-21 22:21:38,186 INFO L93 Difference]: Finished difference Result 58 states and 65 transitions.
[2023-11-21 22:21:38,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states.
[2023-11-21 22:21:38,187 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 7 states have call successors, (11), 6 states have call predecessors, (11), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 31
[2023-11-21 22:21:38,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-21 22:21:38,188 INFO L225 Difference]: With dead ends: 58
[2023-11-21 22:21:38,188 INFO L226 Difference]: Without dead ends: 53
[2023-11-21 22:21:38,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 33 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702
[2023-11-21 22:21:38,189 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 39 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2023-11-21 22:21:38,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 102 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2023-11-21 22:21:38,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states.
[2023-11-21 22:21:38,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53.
[2023-11-21 22:21:38,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 35 states have internal predecessors, (37), 10 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10)
[2023-11-21 22:21:38,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions.
[2023-11-21 22:21:38,193 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 31
[2023-11-21 22:21:38,193 INFO L84 Accepts]: Finished accepts. word is rejected.
[2023-11-21 22:21:38,193 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions.
[2023-11-21 22:21:38,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 7 states have call successors, (11), 6 states have call predecessors, (11), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7)
[2023-11-21 22:21:38,194 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions.
[2023-11-21 22:21:38,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53
[2023-11-21 22:21:38,196 INFO L187 NwaCegarLoop]: Found error trace
[2023-11-21 22:21:38,196 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-21 22:21:38,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d5289a-e264-47f8-8420-acc8373bd178/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0
[2023-11-21 22:21:38,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d5289a-e264-47f8-8420-acc8373bd178/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12
[2023-11-21 22:21:38,409 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting checkErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] ===
[2023-11-21 22:21:38,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier
[2023-11-21 22:21:38,409 INFO L85 PathProgramCache]: Analyzing trace with hash 330124194, now seen corresponding path program 1 times
[2023-11-21 22:21:38,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-21 22:21:38,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54057805]
[2023-11-21 22:21:38,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-21 22:21:38,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-21 22:21:38,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-21 22:21:39,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1
[2023-11-21 22:21:39,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-21 22:21:39,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8
[2023-11-21 22:21:39,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-21 22:21:39,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16
[2023-11-21 22:21:39,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-21 22:21:39,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2023-11-21 22:21:39,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-21 22:21:39,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2023-11-21 22:21:39,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-21 22:21:39,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16
[2023-11-21 22:21:39,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-21 22:21:39,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21
[2023-11-21 22:21:39,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-21 22:21:39,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47
[2023-11-21 22:21:39,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-21 22:21:39,564 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked.
[2023-11-21 22:21:39,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-21 22:21:39,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54057805]
[2023-11-21 22:21:39,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54057805] provided 0 perfect and 1 imperfect interpolant sequences
[2023-11-21 22:21:39,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430129054]
[2023-11-21 22:21:39,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-21 22:21:39,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-21 22:21:39,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d5289a-e264-47f8-8420-acc8373bd178/bin/uautomizer-verify-bycVGegfSx/z3
[2023-11-21 22:21:39,567 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d5289a-e264-47f8-8420-acc8373bd178/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-21 22:21:39,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d5289a-e264-47f8-8420-acc8373bd178/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process
[2023-11-21 22:21:39,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-21 22:21:39,660 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 42 conjunts are in the unsatisfiable core
[2023-11-21 22:21:39,664 INFO L285 TraceCheckSpWp]: Computing forward predicates...
[2023-11-21 22:21:40,616 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked.
[2023-11-21 22:21:40,617 INFO L327 TraceCheckSpWp]: Computing backward predicates...
[2023-11-21 22:21:41,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430129054] provided 0 perfect and 1 imperfect interpolant sequences
[2023-11-21 22:21:41,567 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2023-11-21 22:21:41,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32
[2023-11-21 22:21:41,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258745320]
[2023-11-21 22:21:41,568 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2023-11-21 22:21:41,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states
[2023-11-21 22:21:41,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-21 22:21:41,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants.
[2023-11-21 22:21:41,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1307, Unknown=0, NotChecked=0, Total=1406
[2023-11-21 22:21:41,572 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand has 33 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 27 states have internal predecessors, (49), 17 states have call successors, (17), 4 states have call predecessors, (17), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15)
[2023-11-21 22:21:43,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-21 22:21:43,419 INFO L93 Difference]: Finished difference Result 63 states and 67 transitions.
[2023-11-21 22:21:43,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states.
[2023-11-21 22:21:43,420 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 27 states have internal predecessors, (49), 17 states have call successors, (17), 4 states have call predecessors, (17), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Word has length 52
[2023-11-21 22:21:43,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-21 22:21:43,421 INFO L225 Difference]: With dead ends: 63
[2023-11-21 22:21:43,421 INFO L226 Difference]: Without dead ends: 53
[2023-11-21 22:21:43,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=336, Invalid=3086, Unknown=0, NotChecked=0, Total=3422
[2023-11-21 22:21:43,423 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 69 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time
[2023-11-21 22:21:43,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 209 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 540 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time]
[2023-11-21 22:21:43,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states.
[2023-11-21 22:21:43,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49.
[2023-11-21 22:21:43,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 32 states have (on average 1.0625) internal successors, (34), 33 states have internal predecessors, (34), 9 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8)
[2023-11-21 22:21:43,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions.
[2023-11-21 22:21:43,426 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 52
[2023-11-21 22:21:43,427 INFO L84 Accepts]: Finished accepts. word is rejected.
[2023-11-21 22:21:43,427 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions.
[2023-11-21 22:21:43,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 27 states have internal predecessors, (49), 17 states have call successors, (17), 4 states have call predecessors, (17), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15)
[2023-11-21 22:21:43,427 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions.
[2023-11-21 22:21:43,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64
[2023-11-21 22:21:43,429 INFO L187 NwaCegarLoop]: Found error trace
[2023-11-21 22:21:43,429 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-21 22:21:43,453 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d5289a-e264-47f8-8420-acc8373bd178/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0
[2023-11-21 22:21:43,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d5289a-e264-47f8-8420-acc8373bd178/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13
[2023-11-21 22:21:43,630 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting checkErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] ===
[2023-11-21 22:21:43,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier
[2023-11-21 22:21:43,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1877530748, now seen corresponding path program 2 times
[2023-11-21 22:21:43,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-21 22:21:43,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515066685]
[2023-11-21 22:21:43,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-21 22:21:43,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-21 22:21:43,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-21 22:21:44,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1
[2023-11-21 22:21:44,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-21 22:21:44,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8
[2023-11-21 22:21:44,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-21 22:21:44,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19
[2023-11-21 22:21:44,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-21 22:21:44,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27
[2023-11-21 22:21:44,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-21 22:21:45,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2023-11-21 22:21:45,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-21 22:21:45,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2023-11-21 22:21:45,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-21 22:21:45,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16
[2023-11-21 22:21:45,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-21 22:21:45,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21
[2023-11-21 22:21:45,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-21 22:21:45,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58
[2023-11-21 22:21:45,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-21 22:21:45,161 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked.
[2023-11-21 22:21:45,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-21 22:21:45,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515066685]
[2023-11-21 22:21:45,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515066685] provided 0 perfect and 1 imperfect interpolant sequences
[2023-11-21 22:21:45,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314931172]
[2023-11-21 22:21:45,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2023-11-21 22:21:45,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-21 22:21:45,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d5289a-e264-47f8-8420-acc8373bd178/bin/uautomizer-verify-bycVGegfSx/z3
[2023-11-21 22:21:45,163 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d5289a-e264-47f8-8420-acc8373bd178/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-21 22:21:45,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d5289a-e264-47f8-8420-acc8373bd178/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process
[2023-11-21 22:21:45,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2023-11-21 22:21:45,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2023-11-21 22:21:45,261 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 43 conjunts are in the unsatisfiable core
[2023-11-21 22:21:45,267 INFO L285 TraceCheckSpWp]: Computing forward predicates...
[2023-11-21 22:21:45,275 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
[2023-11-21 22:21:45,277 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6
[2023-11-21 22:21:47,883 INFO L349 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size
[2023-11-21 22:21:47,884 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 126 treesize of output 130
[2023-11-21 22:21:47,925 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size
[2023-11-21 22:21:47,925 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 43
[2023-11-21 22:21:48,382 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 17 proven. 27 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked.
[2023-11-21 22:21:48,382 INFO L327 TraceCheckSpWp]: Computing backward predicates...
[2023-11-21 22:21:50,142 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked.
[2023-11-21 22:21:50,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314931172] provided 0 perfect and 2 imperfect interpolant sequences
[2023-11-21 22:21:50,143 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2023-11-21 22:21:50,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18, 12] total 49
[2023-11-21 22:21:50,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857353544]
[2023-11-21 22:21:50,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2023-11-21 22:21:50,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states
[2023-11-21 22:21:50,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-21 22:21:50,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants.
[2023-11-21 22:21:50,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=2269, Unknown=0, NotChecked=0, Total=2450
[2023-11-21 22:21:50,148 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand has 50 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 41 states have internal predecessors, (84), 20 states have call successors, (28), 7 states have call predecessors, (28), 10 states have return successors, (23), 20 states have call predecessors, (23), 18 states have call successors, (23)
[2023-11-21 22:21:54,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-21 22:21:54,260 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions.
[2023-11-21 22:21:54,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states.
[2023-11-21 22:21:54,261 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 41 states have internal predecessors, (84), 20 states have call successors, (28), 7 states have call predecessors, (28), 10 states have return successors, (23), 20 states have call predecessors, (23), 18 states have call successors, (23) Word has length 63
[2023-11-21 22:21:54,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-21 22:21:54,262 INFO L225 Difference]: With dead ends: 60
[2023-11-21 22:21:54,262 INFO L226 Difference]: Without dead ends: 0
[2023-11-21 22:21:54,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 108 SyntacticMatches, 7 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=582, Invalid=4110, Unknown=0, NotChecked=0, Total=4692
[2023-11-21 22:21:54,264 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 206 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 1130 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 1258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 1130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time
[2023-11-21 22:21:54,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 339 Invalid, 1258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 1130 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time]
[2023-11-21 22:21:54,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states.
[2023-11-21 22:21:54,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0.
[2023-11-21 22:21:54,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-21 22:21:54,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions.
[2023-11-21 22:21:54,266 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 63
[2023-11-21 22:21:54,266 INFO L84 Accepts]: Finished accepts. word is rejected.
[2023-11-21 22:21:54,266 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions.
[2023-11-21 22:21:54,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 41 states have internal predecessors, (84), 20 states have call successors, (28), 7 states have call predecessors, (28), 10 states have return successors, (23), 20 states have call predecessors, (23), 18 states have call successors, (23)
[2023-11-21 22:21:54,267 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions.
[2023-11-21 22:21:54,267 INFO L282 IsEmpty]: Finished isEmpty. No accepting run.
[2023-11-21 22:21:54,270 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE (12 of 13 remaining)
[2023-11-21 22:21:54,270 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE (11 of 13 remaining)
[2023-11-21 22:21:54,271 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (10 of 13 remaining)
[2023-11-21 22:21:54,271 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK (9 of 13 remaining)
[2023-11-21 22:21:54,272 INFO L805 garLoopResultBuilder]: Registering result SAFE for location checkErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 13 remaining)
[2023-11-21 22:21:54,272 INFO L805 garLoopResultBuilder]: Registering result SAFE for location checkErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 13 remaining)
[2023-11-21 22:21:54,272 INFO L805 garLoopResultBuilder]: Registering result SAFE for location checkErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 13 remaining)
[2023-11-21 22:21:54,273 INFO L805 garLoopResultBuilder]: Registering result SAFE for location checkErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 13 remaining)
[2023-11-21 22:21:54,273 INFO L805 garLoopResultBuilder]: Registering result SAFE for location checkErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 13 remaining)
[2023-11-21 22:21:54,273 INFO L805 garLoopResultBuilder]: Registering result SAFE for location checkErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 13 remaining)
[2023-11-21 22:21:54,273 INFO L805 garLoopResultBuilder]: Registering result SAFE for location checkErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 13 remaining)
[2023-11-21 22:21:54,274 INFO L805 garLoopResultBuilder]: Registering result SAFE for location checkErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 13 remaining)
[2023-11-21 22:21:54,274 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 13 remaining)
[2023-11-21 22:21:54,301 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d5289a-e264-47f8-8420-acc8373bd178/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0
[2023-11-21 22:21:54,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d5289a-e264-47f8-8420-acc8373bd178/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14
[2023-11-21 22:21:54,499 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-21 22:21:54,501 INFO L178 ceAbstractionStarter]: Computing trace abstraction results
[2023-11-21 22:21:54,505 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.11 10:21:54 BoogieIcfgContainer
[2023-11-21 22:21:54,505 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2023-11-21 22:21:54,505 INFO L112 PluginConnector]: ------------------------Witness Printer----------------------------
[2023-11-21 22:21:54,505 INFO L270 PluginConnector]: Initializing Witness Printer...
[2023-11-21 22:21:54,508 INFO L274 PluginConnector]: Witness Printer initialized
[2023-11-21 22:21:54,509 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:21:24" (3/4) ...
[2023-11-21 22:21:54,512 INFO L137 WitnessPrinter]: Generating witness for correct program
[2023-11-21 22:21:54,517 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not
[2023-11-21 22:21:54,517 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure check
[2023-11-21 22:21:54,517 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert
[2023-11-21 22:21:54,526 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 29 nodes and edges
[2023-11-21 22:21:54,526 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges
[2023-11-21 22:21:54,527 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges
[2023-11-21 22:21:54,527 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges
[2023-11-21 22:21:54,643 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d5289a-e264-47f8-8420-acc8373bd178/bin/uautomizer-verify-bycVGegfSx/witness.graphml
[2023-11-21 22:21:54,643 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d5289a-e264-47f8-8420-acc8373bd178/bin/uautomizer-verify-bycVGegfSx/witness.yml
[2023-11-21 22:21:54,644 INFO L131 PluginConnector]: ------------------------ END Witness Printer----------------------------
[2023-11-21 22:21:54,644 INFO L158 Benchmark]: Toolchain (without parser) took 31468.68ms. Allocated memory was 172.0MB in the beginning and 360.7MB in the end (delta: 188.7MB). Free memory was 134.5MB in the beginning and 298.4MB in the end (delta: -163.9MB). Peak memory consumption was 26.9MB. Max. memory is 16.1GB.
[2023-11-21 22:21:54,645 INFO L158 Benchmark]: CDTParser took 0.48ms. Allocated memory is still 121.6MB. Free memory is still 90.5MB. There was no memory consumed. Max. memory is 16.1GB.
[2023-11-21 22:21:54,645 INFO L158 Benchmark]: CACSL2BoogieTranslator took 294.12ms. Allocated memory is still 172.0MB. Free memory was 133.8MB in the beginning and 123.3MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB.
[2023-11-21 22:21:54,646 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.42ms. Allocated memory is still 172.0MB. Free memory was 123.3MB in the beginning and 121.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB.
[2023-11-21 22:21:54,646 INFO L158 Benchmark]: Boogie Preprocessor took 51.22ms. Allocated memory is still 172.0MB. Free memory was 121.2MB in the beginning and 120.5MB in the end (delta: 673.3kB). There was no memory consumed. Max. memory is 16.1GB.
[2023-11-21 22:21:54,648 INFO L158 Benchmark]: RCFGBuilder took 503.11ms. Allocated memory is still 172.0MB. Free memory was 119.9MB in the beginning and 102.3MB in the end (delta: 17.5MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB.
[2023-11-21 22:21:54,650 INFO L158 Benchmark]: TraceAbstraction took 30437.34ms. Allocated memory was 172.0MB in the beginning and 360.7MB in the end (delta: 188.7MB). Free memory was 101.7MB in the beginning and 303.2MB in the end (delta: -201.5MB). There was no memory consumed. Max. memory is 16.1GB.
[2023-11-21 22:21:54,651 INFO L158 Benchmark]: Witness Printer took 138.45ms. Allocated memory is still 360.7MB. Free memory was 303.2MB in the beginning and 298.4MB in the end (delta: 4.8MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB.
[2023-11-21 22:21:54,655 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] #######################
--- Results ---
* Results from de.uni_freiburg.informatik.ultimate.core:
- StatisticsResult: Toolchain Benchmarks
Benchmark results are:
* CDTParser took 0.48ms. Allocated memory is still 121.6MB. Free memory is still 90.5MB. There was no memory consumed. Max. memory is 16.1GB.
* CACSL2BoogieTranslator took 294.12ms. Allocated memory is still 172.0MB. Free memory was 133.8MB in the beginning and 123.3MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB.
* Boogie Procedure Inliner took 34.42ms. Allocated memory is still 172.0MB. Free memory was 123.3MB in the beginning and 121.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB.
* Boogie Preprocessor took 51.22ms. Allocated memory is still 172.0MB. Free memory was 121.2MB in the beginning and 120.5MB in the end (delta: 673.3kB). There was no memory consumed. Max. memory is 16.1GB.
* RCFGBuilder took 503.11ms. Allocated memory is still 172.0MB. Free memory was 119.9MB in the beginning and 102.3MB in the end (delta: 17.5MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB.
* TraceAbstraction took 30437.34ms. Allocated memory was 172.0MB in the beginning and 360.7MB in the end (delta: 188.7MB). Free memory was 101.7MB in the beginning and 303.2MB in the end (delta: -201.5MB). There was no memory consumed. Max. memory is 16.1GB.
* Witness Printer took 138.45ms. Allocated memory is still 360.7MB. Free memory was 303.2MB in the beginning and 298.4MB in the end (delta: 4.8MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB.
* Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
- StatisticsResult: ErrorAutomatonStatistics
NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0
- PositiveResult [Line: 48]: free always succeeds
For all program executions holds that free always succeeds at this location
- PositiveResult [Line: 48]: free always succeeds
For all program executions holds that free always succeeds at this location
- PositiveResult [Line: 48]: free always succeeds
For all program executions holds that free always succeeds at this location
- PositiveResult [Line: 41]: all allocated memory was freed
For all program executions holds that all allocated memory was freed at this location
- PositiveResult [Line: -1]: pointer dereference always succeeds
For all program executions holds that pointer dereference always succeeds at this location
- PositiveResult [Line: -1]: pointer dereference always succeeds
For all program executions holds that pointer dereference always succeeds at this location
- PositiveResult [Line: -1]: pointer dereference always succeeds
For all program executions holds that pointer dereference always succeeds at this location
- PositiveResult [Line: -1]: pointer dereference always succeeds
For all program executions holds that pointer dereference always succeeds at this location
- PositiveResult [Line: -1]: pointer dereference always succeeds
For all program executions holds that pointer dereference always succeeds at this location
- PositiveResult [Line: -1]: pointer dereference always succeeds
For all program executions holds that pointer dereference always succeeds at this location
- PositiveResult [Line: -1]: pointer dereference always succeeds
For all program executions holds that pointer dereference always succeeds at this location
- PositiveResult [Line: -1]: pointer dereference always succeeds
For all program executions holds that pointer dereference always succeeds at this location
- PositiveResult [Line: 5]: all allocated memory was freed
For all program executions holds that all allocated memory was freed at this location
- StatisticsResult: Ultimate Automizer benchmark data
CFG has 4 procedures, 45 locations, 13 error locations. Started 1 CEGAR loops. OverallTime: 30.4s, OverallIterations: 15, TraceHistogramMax: 4, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 9.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 726 SdHoareTripleChecker+Valid, 3.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 715 mSDsluCounter, 2079 SdHoareTripleChecker+Invalid, 3.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1714 mSDsCounter, 314 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3644 IncrementalHoareTripleChecker+Invalid, 3958 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 314 mSolverCounterUnsat, 365 mSDtfsCounter, 3644 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 704 GetRequests, 393 SyntacticMatches, 16 SemanticMatches, 295 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2203 ImplicationChecksByTransitivity, 13.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=63occurred in iteration=1, InterpolantAutomatonStates: 163, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 15 MinimizatonAttempts, 33 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 17.9s InterpolantComputationTime, 608 NumberOfCodeBlocks, 608 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 721 ConstructedInterpolants, 74 QuantifiedInterpolants, 7523 SizeOfPredicates, 108 NumberOfNonLiveVariables, 1222 ConjunctsInSsa, 203 ConjunctsInUnsatCore, 26 InterpolantComputations, 9 PerfectInterpolantSequences, 203/328 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available
- AllSpecificationsHoldResult: All specifications hold
13 specifications checked. All of them hold
RESULT: Ultimate proved your program to be correct!
[2023-11-21 22:21:54,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d5289a-e264-47f8-8420-acc8373bd178/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0
Received shutdown request...
--- End real Ultimate output ---
Execution finished normally
Writing output log to file Ultimate.log
Result:
TRUE