/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/seq-mthreaded/pals_lcr.4_overflow.ufo.UNBOUNDED.pals.c


--------------------------------------------------------------------------------


This is Ultimate 0.2.3-dev-f954360
[2023-04-01 06:18:28,356 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2023-04-01 06:18:28,358 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2023-04-01 06:18:28,389 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2023-04-01 06:18:28,390 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2023-04-01 06:18:28,390 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2023-04-01 06:18:28,391 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2023-04-01 06:18:28,393 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2023-04-01 06:18:28,395 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2023-04-01 06:18:28,395 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2023-04-01 06:18:28,396 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2023-04-01 06:18:28,397 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2023-04-01 06:18:28,397 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2023-04-01 06:18:28,398 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2023-04-01 06:18:28,399 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2023-04-01 06:18:28,400 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2023-04-01 06:18:28,400 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2023-04-01 06:18:28,401 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2023-04-01 06:18:28,402 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2023-04-01 06:18:28,403 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2023-04-01 06:18:28,404 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2023-04-01 06:18:28,411 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2023-04-01 06:18:28,411 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2023-04-01 06:18:28,412 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2023-04-01 06:18:28,418 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
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[2023-04-01 06:18:28,418 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2023-04-01 06:18:28,419 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2023-04-01 06:18:28,419 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2023-04-01 06:18:28,420 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2023-04-01 06:18:28,420 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2023-04-01 06:18:28,421 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2023-04-01 06:18:28,421 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2023-04-01 06:18:28,422 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2023-04-01 06:18:28,422 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2023-04-01 06:18:28,423 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
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[2023-04-01 06:18:28,424 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2023-04-01 06:18:28,424 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2023-04-01 06:18:28,425 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2023-04-01 06:18:28,431 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf
[2023-04-01 06:18:28,452 INFO  L113        SettingsManager]: Loading preferences was successful
[2023-04-01 06:18:28,452 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2023-04-01 06:18:28,452 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-04-01 06:18:28,452 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-04-01 06:18:28,453 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-04-01 06:18:28,453 INFO  L138        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-04-01 06:18:28,453 INFO  L138        SettingsManager]:  * User list type=DISABLED
[2023-04-01 06:18:28,453 INFO  L136        SettingsManager]: Preferences of Abstract Interpretation differ from their defaults:
[2023-04-01 06:18:28,454 INFO  L138        SettingsManager]:  * Explicit value domain=true
[2023-04-01 06:18:28,454 INFO  L138        SettingsManager]:  * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain
[2023-04-01 06:18:28,454 INFO  L138        SettingsManager]:  * Octagon Domain=false
[2023-04-01 06:18:28,454 INFO  L138        SettingsManager]:  * Abstract domain=CompoundDomain
[2023-04-01 06:18:28,454 INFO  L138        SettingsManager]:  * Check feasibility of abstract posts with an SMT solver=true
[2023-04-01 06:18:28,454 INFO  L138        SettingsManager]:  * Use the RCFG-of-the-future interface=true
[2023-04-01 06:18:28,454 INFO  L138        SettingsManager]:  * Interval Domain=false
[2023-04-01 06:18:28,454 INFO  L136        SettingsManager]: Preferences of Sifa differ from their defaults:
[2023-04-01 06:18:28,455 INFO  L138        SettingsManager]:  * Call Summarizer=TopInputCallSummarizer
[2023-04-01 06:18:28,455 INFO  L138        SettingsManager]:  * Simplification Technique=POLY_PAC
[2023-04-01 06:18:28,455 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-04-01 06:18:28,455 INFO  L138        SettingsManager]:  * sizeof long=4
[2023-04-01 06:18:28,455 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-04-01 06:18:28,456 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2023-04-01 06:18:28,456 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2023-04-01 06:18:28,456 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-04-01 06:18:28,456 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-04-01 06:18:28,456 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-04-01 06:18:28,456 INFO  L138        SettingsManager]:  * sizeof long double=12
[2023-04-01 06:18:28,458 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2023-04-01 06:18:28,458 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2023-04-01 06:18:28,458 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-04-01 06:18:28,458 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-04-01 06:18:28,458 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-04-01 06:18:28,458 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-04-01 06:18:28,459 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-04-01 06:18:28,459 INFO  L138        SettingsManager]:  * Abstract interpretation Mode=USE_PREDICATES
[2023-04-01 06:18:28,459 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-04-01 06:18:28,459 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2023-04-01 06:18:28,459 INFO  L138        SettingsManager]:  * Trace refinement strategy=SIFA_TAIPAN
[2023-04-01 06:18:28,459 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-04-01 06:18:28,459 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-04-01 06:18:28,460 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2023-04-01 06:18:28,460 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain
[2023-04-01 06:18:28,654 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-04-01 06:18:28,670 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-04-01 06:18:28,672 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-04-01 06:18:28,673 INFO  L271        PluginConnector]: Initializing CDTParser...
[2023-04-01 06:18:28,674 INFO  L275        PluginConnector]: CDTParser initialized
[2023-04-01 06:18:28,675 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr.4_overflow.ufo.UNBOUNDED.pals.c
[2023-04-01 06:18:29,817 INFO  L500              CDTParser]: Created temporary CDT project at NULL
[2023-04-01 06:18:29,987 INFO  L351              CDTParser]: Found 1 translation units.
[2023-04-01 06:18:29,988 INFO  L172              CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.4_overflow.ufo.UNBOUNDED.pals.c
[2023-04-01 06:18:29,995 INFO  L394              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/910619098/18b067b366654396bc9a119e4cdf3f14/FLAGa9ca8e110
[2023-04-01 06:18:30,006 INFO  L402              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/910619098/18b067b366654396bc9a119e4cdf3f14
[2023-04-01 06:18:30,009 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-04-01 06:18:30,010 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2023-04-01 06:18:30,011 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-04-01 06:18:30,011 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-04-01 06:18:30,017 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-04-01 06:18:30,017 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:18:30" (1/1) ...
[2023-04-01 06:18:30,018 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@522b19a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:18:30, skipping insertion in model container
[2023-04-01 06:18:30,018 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:18:30" (1/1) ...
[2023-04-01 06:18:30,025 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2023-04-01 06:18:30,063 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2023-04-01 06:18:30,268 WARN  L247   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.4_overflow.ufo.UNBOUNDED.pals.c[8379,8392]
[2023-04-01 06:18:30,271 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-04-01 06:18:30,280 INFO  L203         MainTranslator]: Completed pre-run
[2023-04-01 06:18:30,314 WARN  L247   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.4_overflow.ufo.UNBOUNDED.pals.c[8379,8392]
[2023-04-01 06:18:30,315 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-04-01 06:18:30,328 INFO  L208         MainTranslator]: Completed translation
[2023-04-01 06:18:30,328 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:18:30 WrapperNode
[2023-04-01 06:18:30,328 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-04-01 06:18:30,329 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-04-01 06:18:30,329 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2023-04-01 06:18:30,329 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2023-04-01 06:18:30,339 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:18:30" (1/1) ...
[2023-04-01 06:18:30,339 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:18:30" (1/1) ...
[2023-04-01 06:18:30,351 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:18:30" (1/1) ...
[2023-04-01 06:18:30,352 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:18:30" (1/1) ...
[2023-04-01 06:18:30,362 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:18:30" (1/1) ...
[2023-04-01 06:18:30,368 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:18:30" (1/1) ...
[2023-04-01 06:18:30,369 INFO  L185        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:18:30" (1/1) ...
[2023-04-01 06:18:30,371 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:18:30" (1/1) ...
[2023-04-01 06:18:30,374 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-04-01 06:18:30,374 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-04-01 06:18:30,374 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2023-04-01 06:18:30,375 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2023-04-01 06:18:30,375 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:18:30" (1/1) ...
[2023-04-01 06:18:30,384 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-04-01 06:18:30,394 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-04-01 06:18:30,405 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2023-04-01 06:18:30,408 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2023-04-01 06:18:30,436 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2023-04-01 06:18:30,437 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-04-01 06:18:30,437 INFO  L138     BoogieDeclarations]: Found implementation of procedure reach_error
[2023-04-01 06:18:30,437 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2023-04-01 06:18:30,437 INFO  L138     BoogieDeclarations]: Found implementation of procedure node1
[2023-04-01 06:18:30,437 INFO  L138     BoogieDeclarations]: Found implementation of procedure node2
[2023-04-01 06:18:30,437 INFO  L138     BoogieDeclarations]: Found implementation of procedure node3
[2023-04-01 06:18:30,437 INFO  L138     BoogieDeclarations]: Found implementation of procedure node4
[2023-04-01 06:18:30,438 INFO  L138     BoogieDeclarations]: Found implementation of procedure init
[2023-04-01 06:18:30,438 INFO  L138     BoogieDeclarations]: Found implementation of procedure check
[2023-04-01 06:18:30,438 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2023-04-01 06:18:30,438 INFO  L138     BoogieDeclarations]: Found implementation of procedure assert
[2023-04-01 06:18:30,438 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2023-04-01 06:18:30,438 INFO  L130     BoogieDeclarations]: Found specification of procedure __assert_fail
[2023-04-01 06:18:30,438 INFO  L130     BoogieDeclarations]: Found specification of procedure reach_error
[2023-04-01 06:18:30,438 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-04-01 06:18:30,438 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool
[2023-04-01 06:18:30,439 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char
[2023-04-01 06:18:30,439 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar
[2023-04-01 06:18:30,439 INFO  L130     BoogieDeclarations]: Found specification of procedure assert
[2023-04-01 06:18:30,439 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2023-04-01 06:18:30,439 INFO  L130     BoogieDeclarations]: Found specification of procedure read
[2023-04-01 06:18:30,439 INFO  L130     BoogieDeclarations]: Found specification of procedure write
[2023-04-01 06:18:30,439 INFO  L130     BoogieDeclarations]: Found specification of procedure node1
[2023-04-01 06:18:30,439 INFO  L130     BoogieDeclarations]: Found specification of procedure node2
[2023-04-01 06:18:30,440 INFO  L130     BoogieDeclarations]: Found specification of procedure node3
[2023-04-01 06:18:30,440 INFO  L130     BoogieDeclarations]: Found specification of procedure node4
[2023-04-01 06:18:30,440 INFO  L130     BoogieDeclarations]: Found specification of procedure init
[2023-04-01 06:18:30,440 INFO  L130     BoogieDeclarations]: Found specification of procedure check
[2023-04-01 06:18:30,440 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2023-04-01 06:18:30,440 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2023-04-01 06:18:30,440 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2023-04-01 06:18:30,440 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-04-01 06:18:30,441 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2023-04-01 06:18:30,441 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2023-04-01 06:18:30,441 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2023-04-01 06:18:30,589 INFO  L236             CfgBuilder]: Building ICFG
[2023-04-01 06:18:30,591 INFO  L262             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-04-01 06:18:30,975 INFO  L277             CfgBuilder]: Performing block encoding
[2023-04-01 06:18:31,295 INFO  L297             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-04-01 06:18:31,295 INFO  L302             CfgBuilder]: Removed 1 assume(true) statements.
[2023-04-01 06:18:31,298 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:18:31 BoogieIcfgContainer
[2023-04-01 06:18:31,298 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-04-01 06:18:31,300 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-04-01 06:18:31,300 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2023-04-01 06:18:31,302 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2023-04-01 06:18:31,302 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 06:18:30" (1/3) ...
[2023-04-01 06:18:31,303 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46179703 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:18:31, skipping insertion in model container
[2023-04-01 06:18:31,303 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:18:30" (2/3) ...
[2023-04-01 06:18:31,303 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46179703 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:18:31, skipping insertion in model container
[2023-04-01 06:18:31,303 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:18:31" (3/3) ...
[2023-04-01 06:18:31,304 INFO  L112   eAbstractionObserver]: Analyzing ICFG pals_lcr.4_overflow.ufo.UNBOUNDED.pals.c
[2023-04-01 06:18:31,318 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-04-01 06:18:31,319 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-04-01 06:18:31,367 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-04-01 06:18:31,374 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=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@254e4ee6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2023-04-01 06:18:31,375 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-04-01 06:18:31,378 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 46 states, 24 states have (on average 1.25) internal successors, (30), 26 states have internal predecessors, (30), 10 states have call successors, (10), 10 states have call predecessors, (10), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10)
[2023-04-01 06:18:31,385 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 38
[2023-04-01 06:18:31,385 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 06:18:31,386 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-01 06:18:31,387 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 06:18:31,393 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 06:18:31,393 INFO  L85        PathProgramCache]: Analyzing trace with hash 24412382, now seen corresponding path program 1 times
[2023-04-01 06:18:31,401 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 06:18:31,401 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565295153]
[2023-04-01 06:18:31,401 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 06:18:31,402 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 06:18:31,645 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 06:18:34,011 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-01 06:18:34,012 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 06:18:34,012 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565295153]
[2023-04-01 06:18:34,013 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565295153] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 06:18:34,013 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 06:18:34,013 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22
[2023-04-01 06:18:34,014 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118773956]
[2023-04-01 06:18:34,015 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 06:18:34,018 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 22 states
[2023-04-01 06:18:34,019 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 06:18:34,049 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants.
[2023-04-01 06:18:34,051 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462
[2023-04-01 06:18:34,053 INFO  L87              Difference]: Start difference. First operand  has 46 states, 24 states have (on average 1.25) internal successors, (30), 26 states have internal predecessors, (30), 10 states have call successors, (10), 10 states have call predecessors, (10), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand  has 22 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 13 states have internal predecessors, (19), 9 states have call successors, (10), 7 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8)
[2023-04-01 06:18:35,193 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 06:18:35,193 INFO  L93              Difference]: Finished difference Result 106 states and 124 transitions.
[2023-04-01 06:18:35,194 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. 
[2023-04-01 06:18:35,195 INFO  L78                 Accepts]: Start accepts. Automaton has  has 22 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 13 states have internal predecessors, (19), 9 states have call successors, (10), 7 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 37
[2023-04-01 06:18:35,196 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 06:18:35,203 INFO  L225             Difference]: With dead ends: 106
[2023-04-01 06:18:35,203 INFO  L226             Difference]: Without dead ends: 73
[2023-04-01 06:18:35,207 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=377, Invalid=1603, Unknown=0, NotChecked=0, Total=1980
[2023-04-01 06:18:35,212 INFO  L413           NwaCegarLoop]: 20 mSDtfsCounter, 286 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time
[2023-04-01 06:18:35,213 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [292 Valid, 113 Invalid, 776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 605 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time]
[2023-04-01 06:18:35,227 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 73 states.
[2023-04-01 06:18:35,265 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 62.
[2023-04-01 06:18:35,266 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 62 states, 32 states have (on average 1.125) internal successors, (36), 33 states have internal predecessors, (36), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15)
[2023-04-01 06:18:35,268 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions.
[2023-04-01 06:18:35,270 INFO  L78                 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 37
[2023-04-01 06:18:35,271 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 06:18:35,271 INFO  L495      AbstractCegarLoop]: Abstraction has 62 states and 66 transitions.
[2023-04-01 06:18:35,272 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 22 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 13 states have internal predecessors, (19), 9 states have call successors, (10), 7 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8)
[2023-04-01 06:18:35,272 INFO  L276                IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions.
[2023-04-01 06:18:35,274 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 40
[2023-04-01 06:18:35,275 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 06:18:35,275 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-01 06:18:35,275 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-04-01 06:18:35,275 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 06:18:35,276 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 06:18:35,276 INFO  L85        PathProgramCache]: Analyzing trace with hash -1893739361, now seen corresponding path program 1 times
[2023-04-01 06:18:35,276 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 06:18:35,276 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648350049]
[2023-04-01 06:18:35,276 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 06:18:35,277 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 06:18:35,338 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 06:18:35,694 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-01 06:18:35,694 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 06:18:35,695 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648350049]
[2023-04-01 06:18:35,695 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648350049] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 06:18:35,695 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 06:18:35,695 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11
[2023-04-01 06:18:35,695 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227427902]
[2023-04-01 06:18:35,695 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 06:18:35,696 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 11 states
[2023-04-01 06:18:35,697 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 06:18:35,697 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2023-04-01 06:18:35,698 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110
[2023-04-01 06:18:35,698 INFO  L87              Difference]: Start difference. First operand 62 states and 66 transitions. Second operand  has 11 states, 7 states have (on average 3.0) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8)
[2023-04-01 06:18:36,079 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 06:18:36,080 INFO  L93              Difference]: Finished difference Result 124 states and 135 transitions.
[2023-04-01 06:18:36,080 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. 
[2023-04-01 06:18:36,080 INFO  L78                 Accepts]: Start accepts. Automaton has  has 11 states, 7 states have (on average 3.0) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 39
[2023-04-01 06:18:36,081 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 06:18:36,082 INFO  L225             Difference]: With dead ends: 124
[2023-04-01 06:18:36,082 INFO  L226             Difference]: Without dead ends: 92
[2023-04-01 06:18:36,083 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272
[2023-04-01 06:18:36,084 INFO  L413           NwaCegarLoop]: 22 mSDtfsCounter, 105 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2023-04-01 06:18:36,084 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 94 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2023-04-01 06:18:36,085 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 92 states.
[2023-04-01 06:18:36,104 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 65.
[2023-04-01 06:18:36,104 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 65 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 36 states have internal predecessors, (40), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14)
[2023-04-01 06:18:36,105 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions.
[2023-04-01 06:18:36,105 INFO  L78                 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 39
[2023-04-01 06:18:36,106 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 06:18:36,106 INFO  L495      AbstractCegarLoop]: Abstraction has 65 states and 69 transitions.
[2023-04-01 06:18:36,106 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 11 states, 7 states have (on average 3.0) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8)
[2023-04-01 06:18:36,106 INFO  L276                IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions.
[2023-04-01 06:18:36,107 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 40
[2023-04-01 06:18:36,107 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 06:18:36,107 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-01 06:18:36,107 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-04-01 06:18:36,107 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 06:18:36,108 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 06:18:36,108 INFO  L85        PathProgramCache]: Analyzing trace with hash -1014577434, now seen corresponding path program 1 times
[2023-04-01 06:18:36,108 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 06:18:36,108 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770670103]
[2023-04-01 06:18:36,108 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 06:18:36,109 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 06:18:36,155 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 06:18:37,447 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-01 06:18:37,448 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 06:18:37,449 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770670103]
[2023-04-01 06:18:37,449 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770670103] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 06:18:37,450 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 06:18:37,450 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22
[2023-04-01 06:18:37,450 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207769011]
[2023-04-01 06:18:37,451 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 06:18:37,451 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 22 states
[2023-04-01 06:18:37,452 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 06:18:37,453 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants.
[2023-04-01 06:18:37,453 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462
[2023-04-01 06:18:37,453 INFO  L87              Difference]: Start difference. First operand 65 states and 69 transitions. Second operand  has 22 states, 12 states have (on average 1.75) internal successors, (21), 13 states have internal predecessors, (21), 9 states have call successors, (10), 7 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8)
[2023-04-01 06:18:38,398 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 06:18:38,399 INFO  L93              Difference]: Finished difference Result 124 states and 133 transitions.
[2023-04-01 06:18:38,399 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. 
[2023-04-01 06:18:38,400 INFO  L78                 Accepts]: Start accepts. Automaton has  has 22 states, 12 states have (on average 1.75) internal successors, (21), 13 states have internal predecessors, (21), 9 states have call successors, (10), 7 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 39
[2023-04-01 06:18:38,400 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 06:18:38,401 INFO  L225             Difference]: With dead ends: 124
[2023-04-01 06:18:38,401 INFO  L226             Difference]: Without dead ends: 92
[2023-04-01 06:18:38,402 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=354, Invalid=1452, Unknown=0, NotChecked=0, Total=1806
[2023-04-01 06:18:38,403 INFO  L413           NwaCegarLoop]: 20 mSDtfsCounter, 327 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time
[2023-04-01 06:18:38,403 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [335 Valid, 104 Invalid, 738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time]
[2023-04-01 06:18:38,404 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 92 states.
[2023-04-01 06:18:38,425 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 65.
[2023-04-01 06:18:38,425 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 65 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 36 states have internal predecessors, (39), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14)
[2023-04-01 06:18:38,427 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions.
[2023-04-01 06:18:38,427 INFO  L78                 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 39
[2023-04-01 06:18:38,428 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 06:18:38,428 INFO  L495      AbstractCegarLoop]: Abstraction has 65 states and 68 transitions.
[2023-04-01 06:18:38,428 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 22 states, 12 states have (on average 1.75) internal successors, (21), 13 states have internal predecessors, (21), 9 states have call successors, (10), 7 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8)
[2023-04-01 06:18:38,428 INFO  L276                IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions.
[2023-04-01 06:18:38,429 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 41
[2023-04-01 06:18:38,429 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 06:18:38,429 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-01 06:18:38,429 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2023-04-01 06:18:38,430 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 06:18:38,430 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 06:18:38,430 INFO  L85        PathProgramCache]: Analyzing trace with hash 1841111820, now seen corresponding path program 1 times
[2023-04-01 06:18:38,430 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 06:18:38,430 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891072119]
[2023-04-01 06:18:38,431 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 06:18:38,431 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 06:18:38,453 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 06:18:39,091 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-01 06:18:39,092 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 06:18:39,092 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891072119]
[2023-04-01 06:18:39,092 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891072119] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 06:18:39,092 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 06:18:39,092 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13
[2023-04-01 06:18:39,093 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931699084]
[2023-04-01 06:18:39,093 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 06:18:39,093 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 13 states
[2023-04-01 06:18:39,093 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 06:18:39,094 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants.
[2023-04-01 06:18:39,094 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156
[2023-04-01 06:18:39,094 INFO  L87              Difference]: Start difference. First operand 65 states and 68 transitions. Second operand  has 13 states, 8 states have (on average 2.75) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8)
[2023-04-01 06:18:39,384 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 06:18:39,385 INFO  L93              Difference]: Finished difference Result 99 states and 110 transitions.
[2023-04-01 06:18:39,385 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. 
[2023-04-01 06:18:39,387 INFO  L78                 Accepts]: Start accepts. Automaton has  has 13 states, 8 states have (on average 2.75) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 40
[2023-04-01 06:18:39,387 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 06:18:39,390 INFO  L225             Difference]: With dead ends: 99
[2023-04-01 06:18:39,390 INFO  L226             Difference]: Without dead ends: 97
[2023-04-01 06:18:39,391 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462
[2023-04-01 06:18:39,398 INFO  L413           NwaCegarLoop]: 49 mSDtfsCounter, 35 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-04-01 06:18:39,399 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 517 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-04-01 06:18:39,401 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 97 states.
[2023-04-01 06:18:39,433 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 74.
[2023-04-01 06:18:39,433 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 74 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 43 states have internal predecessors, (45), 16 states have call successors, (16), 16 states have call predecessors, (16), 16 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16)
[2023-04-01 06:18:39,435 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions.
[2023-04-01 06:18:39,435 INFO  L78                 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 40
[2023-04-01 06:18:39,436 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 06:18:39,436 INFO  L495      AbstractCegarLoop]: Abstraction has 74 states and 77 transitions.
[2023-04-01 06:18:39,437 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 13 states, 8 states have (on average 2.75) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8)
[2023-04-01 06:18:39,437 INFO  L276                IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions.
[2023-04-01 06:18:39,439 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 66
[2023-04-01 06:18:39,439 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 06:18:39,440 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-01 06:18:39,440 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2023-04-01 06:18:39,440 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 06:18:39,441 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 06:18:39,441 INFO  L85        PathProgramCache]: Analyzing trace with hash -1496209457, now seen corresponding path program 1 times
[2023-04-01 06:18:39,441 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 06:18:39,441 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057398255]
[2023-04-01 06:18:39,441 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 06:18:39,441 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 06:18:39,554 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 06:18:46,497 INFO  L134       CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2023-04-01 06:18:46,498 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 06:18:46,498 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057398255]
[2023-04-01 06:18:46,498 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057398255] provided 0 perfect and 1 imperfect interpolant sequences
[2023-04-01 06:18:46,498 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490093466]
[2023-04-01 06:18:46,498 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 06:18:46,499 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-04-01 06:18:46,499 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-04-01 06:18:46,509 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-04-01 06:18:46,513 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2023-04-01 06:18:46,711 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 06:18:46,733 INFO  L262         TraceCheckSpWp]: Trace formula consists of 656 conjuncts, 168 conjunts are in the unsatisfiable core
[2023-04-01 06:18:46,761 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-04-01 06:19:10,187 INFO  L134       CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-01 06:19:10,187 INFO  L327         TraceCheckSpWp]: Computing backward predicates...