/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.3_overflow.ufo.UNBOUNDED.pals.c


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


This is Ultimate 0.2.3-dev-f954360
[2023-04-01 06:18:06,228 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2023-04-01 06:18:06,231 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2023-04-01 06:18:06,266 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2023-04-01 06:18:06,266 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2023-04-01 06:18:06,269 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2023-04-01 06:18:06,273 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2023-04-01 06:18:06,274 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2023-04-01 06:18:06,276 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2023-04-01 06:18:06,276 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2023-04-01 06:18:06,277 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2023-04-01 06:18:06,278 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2023-04-01 06:18:06,279 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2023-04-01 06:18:06,281 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2023-04-01 06:18:06,282 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2023-04-01 06:18:06,283 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2023-04-01 06:18:06,284 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2023-04-01 06:18:06,286 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2023-04-01 06:18:06,289 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2023-04-01 06:18:06,294 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2023-04-01 06:18:06,296 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2023-04-01 06:18:06,298 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2023-04-01 06:18:06,299 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2023-04-01 06:18:06,300 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2023-04-01 06:18:06,308 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2023-04-01 06:18:06,308 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2023-04-01 06:18:06,308 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2023-04-01 06:18:06,310 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2023-04-01 06:18:06,310 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2023-04-01 06:18:06,311 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2023-04-01 06:18:06,311 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2023-04-01 06:18:06,311 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2023-04-01 06:18:06,313 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2023-04-01 06:18:06,313 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2023-04-01 06:18:06,314 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2023-04-01 06:18:06,314 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
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[2023-04-01 06:18:06,314 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2023-04-01 06:18:06,315 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2023-04-01 06:18:06,316 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2023-04-01 06:18:06,317 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 06:18:06,347 INFO  L113        SettingsManager]: Loading preferences was successful
[2023-04-01 06:18:06,348 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2023-04-01 06:18:06,348 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-04-01 06:18:06,348 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-04-01 06:18:06,349 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-04-01 06:18:06,349 INFO  L138        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-04-01 06:18:06,349 INFO  L138        SettingsManager]:  * User list type=DISABLED
[2023-04-01 06:18:06,349 INFO  L136        SettingsManager]: Preferences of Abstract Interpretation differ from their defaults:
[2023-04-01 06:18:06,350 INFO  L138        SettingsManager]:  * Explicit value domain=true
[2023-04-01 06:18:06,350 INFO  L138        SettingsManager]:  * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain
[2023-04-01 06:18:06,350 INFO  L138        SettingsManager]:  * Octagon Domain=false
[2023-04-01 06:18:06,350 INFO  L138        SettingsManager]:  * Abstract domain=CompoundDomain
[2023-04-01 06:18:06,351 INFO  L138        SettingsManager]:  * Check feasibility of abstract posts with an SMT solver=true
[2023-04-01 06:18:06,351 INFO  L138        SettingsManager]:  * Use the RCFG-of-the-future interface=true
[2023-04-01 06:18:06,351 INFO  L138        SettingsManager]:  * Interval Domain=false
[2023-04-01 06:18:06,351 INFO  L136        SettingsManager]: Preferences of Sifa differ from their defaults:
[2023-04-01 06:18:06,351 INFO  L138        SettingsManager]:  * Call Summarizer=TopInputCallSummarizer
[2023-04-01 06:18:06,351 INFO  L138        SettingsManager]:  * Simplification Technique=POLY_PAC
[2023-04-01 06:18:06,352 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-04-01 06:18:06,352 INFO  L138        SettingsManager]:  * sizeof long=4
[2023-04-01 06:18:06,352 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-04-01 06:18:06,352 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2023-04-01 06:18:06,352 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2023-04-01 06:18:06,352 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-04-01 06:18:06,352 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-04-01 06:18:06,353 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-04-01 06:18:06,353 INFO  L138        SettingsManager]:  * sizeof long double=12
[2023-04-01 06:18:06,353 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2023-04-01 06:18:06,353 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2023-04-01 06:18:06,353 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-04-01 06:18:06,353 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-04-01 06:18:06,354 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-04-01 06:18:06,354 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-04-01 06:18:06,354 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-04-01 06:18:06,354 INFO  L138        SettingsManager]:  * Abstract interpretation Mode=USE_PREDICATES
[2023-04-01 06:18:06,354 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-04-01 06:18:06,354 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2023-04-01 06:18:06,354 INFO  L138        SettingsManager]:  * Trace refinement strategy=SIFA_TAIPAN
[2023-04-01 06:18:06,354 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-04-01 06:18:06,355 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-04-01 06:18:06,355 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2023-04-01 06:18:06,355 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain
[2023-04-01 06:18:06,610 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-04-01 06:18:06,629 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-04-01 06:18:06,632 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-04-01 06:18:06,633 INFO  L271        PluginConnector]: Initializing CDTParser...
[2023-04-01 06:18:06,634 INFO  L275        PluginConnector]: CDTParser initialized
[2023-04-01 06:18:06,635 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr.3_overflow.ufo.UNBOUNDED.pals.c
[2023-04-01 06:18:07,873 INFO  L500              CDTParser]: Created temporary CDT project at NULL
[2023-04-01 06:18:08,096 INFO  L351              CDTParser]: Found 1 translation units.
[2023-04-01 06:18:08,097 INFO  L172              CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.3_overflow.ufo.UNBOUNDED.pals.c
[2023-04-01 06:18:08,104 INFO  L394              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb6aa343b/bff8f2f108ec4828bff5ead850bbefb5/FLAG248db1785
[2023-04-01 06:18:08,122 INFO  L402              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb6aa343b/bff8f2f108ec4828bff5ead850bbefb5
[2023-04-01 06:18:08,126 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-04-01 06:18:08,128 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2023-04-01 06:18:08,131 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-04-01 06:18:08,131 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-04-01 06:18:08,134 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-04-01 06:18:08,135 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:18:08" (1/1) ...
[2023-04-01 06:18:08,137 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21d14d83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:18:08, skipping insertion in model container
[2023-04-01 06:18:08,137 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:18:08" (1/1) ...
[2023-04-01 06:18:08,144 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2023-04-01 06:18:08,181 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2023-04-01 06:18:08,365 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.3_overflow.ufo.UNBOUNDED.pals.c[6117,6130]
[2023-04-01 06:18:08,377 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-04-01 06:18:08,387 INFO  L203         MainTranslator]: Completed pre-run
[2023-04-01 06:18:08,418 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.3_overflow.ufo.UNBOUNDED.pals.c[6117,6130]
[2023-04-01 06:18:08,419 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-04-01 06:18:08,432 INFO  L208         MainTranslator]: Completed translation
[2023-04-01 06:18:08,432 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:18:08 WrapperNode
[2023-04-01 06:18:08,432 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-04-01 06:18:08,433 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-04-01 06:18:08,434 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2023-04-01 06:18:08,434 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2023-04-01 06:18:08,443 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:18:08" (1/1) ...
[2023-04-01 06:18:08,444 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:18:08" (1/1) ...
[2023-04-01 06:18:08,450 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:18:08" (1/1) ...
[2023-04-01 06:18:08,451 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:18:08" (1/1) ...
[2023-04-01 06:18:08,460 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:18:08" (1/1) ...
[2023-04-01 06:18:08,472 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:18:08" (1/1) ...
[2023-04-01 06:18:08,474 INFO  L185        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:18:08" (1/1) ...
[2023-04-01 06:18:08,475 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:18:08" (1/1) ...
[2023-04-01 06:18:08,477 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-04-01 06:18:08,478 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-04-01 06:18:08,478 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2023-04-01 06:18:08,479 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2023-04-01 06:18:08,479 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:18:08" (1/1) ...
[2023-04-01 06:18:08,485 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-04-01 06:18:08,496 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-04-01 06:18:08,508 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 06:18:08,509 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 06:18:08,540 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2023-04-01 06:18:08,540 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-04-01 06:18:08,540 INFO  L138     BoogieDeclarations]: Found implementation of procedure reach_error
[2023-04-01 06:18:08,542 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2023-04-01 06:18:08,542 INFO  L138     BoogieDeclarations]: Found implementation of procedure node1
[2023-04-01 06:18:08,542 INFO  L138     BoogieDeclarations]: Found implementation of procedure node2
[2023-04-01 06:18:08,546 INFO  L138     BoogieDeclarations]: Found implementation of procedure node3
[2023-04-01 06:18:08,546 INFO  L138     BoogieDeclarations]: Found implementation of procedure init
[2023-04-01 06:18:08,546 INFO  L138     BoogieDeclarations]: Found implementation of procedure check
[2023-04-01 06:18:08,546 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2023-04-01 06:18:08,546 INFO  L138     BoogieDeclarations]: Found implementation of procedure assert
[2023-04-01 06:18:08,546 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2023-04-01 06:18:08,546 INFO  L130     BoogieDeclarations]: Found specification of procedure __assert_fail
[2023-04-01 06:18:08,546 INFO  L130     BoogieDeclarations]: Found specification of procedure reach_error
[2023-04-01 06:18:08,547 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-04-01 06:18:08,547 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool
[2023-04-01 06:18:08,547 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char
[2023-04-01 06:18:08,548 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar
[2023-04-01 06:18:08,548 INFO  L130     BoogieDeclarations]: Found specification of procedure assert
[2023-04-01 06:18:08,548 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2023-04-01 06:18:08,548 INFO  L130     BoogieDeclarations]: Found specification of procedure read
[2023-04-01 06:18:08,548 INFO  L130     BoogieDeclarations]: Found specification of procedure write
[2023-04-01 06:18:08,548 INFO  L130     BoogieDeclarations]: Found specification of procedure node1
[2023-04-01 06:18:08,548 INFO  L130     BoogieDeclarations]: Found specification of procedure node2
[2023-04-01 06:18:08,548 INFO  L130     BoogieDeclarations]: Found specification of procedure node3
[2023-04-01 06:18:08,549 INFO  L130     BoogieDeclarations]: Found specification of procedure init
[2023-04-01 06:18:08,549 INFO  L130     BoogieDeclarations]: Found specification of procedure check
[2023-04-01 06:18:08,549 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2023-04-01 06:18:08,549 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2023-04-01 06:18:08,549 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2023-04-01 06:18:08,549 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-04-01 06:18:08,549 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2023-04-01 06:18:08,549 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2023-04-01 06:18:08,549 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2023-04-01 06:18:08,646 INFO  L236             CfgBuilder]: Building ICFG
[2023-04-01 06:18:08,652 INFO  L262             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-04-01 06:18:08,989 INFO  L277             CfgBuilder]: Performing block encoding
[2023-04-01 06:18:09,196 INFO  L297             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-04-01 06:18:09,197 INFO  L302             CfgBuilder]: Removed 1 assume(true) statements.
[2023-04-01 06:18:09,199 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:18:09 BoogieIcfgContainer
[2023-04-01 06:18:09,199 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-04-01 06:18:09,202 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-04-01 06:18:09,202 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2023-04-01 06:18:09,205 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2023-04-01 06:18:09,205 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 06:18:08" (1/3) ...
[2023-04-01 06:18:09,206 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@751c45dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:18:09, skipping insertion in model container
[2023-04-01 06:18:09,206 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:18:08" (2/3) ...
[2023-04-01 06:18:09,206 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@751c45dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:18:09, skipping insertion in model container
[2023-04-01 06:18:09,207 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:18:09" (3/3) ...
[2023-04-01 06:18:09,208 INFO  L112   eAbstractionObserver]: Analyzing ICFG pals_lcr.3_overflow.ufo.UNBOUNDED.pals.c
[2023-04-01 06:18:09,225 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-04-01 06:18:09,225 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-04-01 06:18:09,347 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-04-01 06:18:09,354 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;@1c2ca786, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2023-04-01 06:18:09,354 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-04-01 06:18:09,357 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 43 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 25 states have internal predecessors, (29), 9 states have call successors, (9), 9 states have call predecessors, (9), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9)
[2023-04-01 06:18:09,363 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 35
[2023-04-01 06:18:09,364 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 06:18:09,364 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]
[2023-04-01 06:18:09,365 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 06:18:09,369 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 06:18:09,369 INFO  L85        PathProgramCache]: Analyzing trace with hash 1734222998, now seen corresponding path program 1 times
[2023-04-01 06:18:09,375 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 06:18:09,375 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011051633]
[2023-04-01 06:18:09,376 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 06:18:09,376 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 06:18:09,643 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 06:18:11,177 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 06:18:11,178 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 06:18:11,178 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011051633]
[2023-04-01 06:18:11,179 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011051633] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 06:18:11,179 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 06:18:11,179 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19
[2023-04-01 06:18:11,181 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145233422]
[2023-04-01 06:18:11,181 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 06:18:11,185 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 19 states
[2023-04-01 06:18:11,185 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 06:18:11,224 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants.
[2023-04-01 06:18:11,226 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342
[2023-04-01 06:18:11,228 INFO  L87              Difference]: Start difference. First operand  has 43 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 25 states have internal predecessors, (29), 9 states have call successors, (9), 9 states have call predecessors, (9), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand  has 19 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 12 states have internal predecessors, (18), 8 states have call successors, (9), 6 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7)
[2023-04-01 06:18:12,087 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 06:18:12,087 INFO  L93              Difference]: Finished difference Result 127 states and 154 transitions.
[2023-04-01 06:18:12,088 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. 
[2023-04-01 06:18:12,090 INFO  L78                 Accepts]: Start accepts. Automaton has  has 19 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 12 states have internal predecessors, (18), 8 states have call successors, (9), 6 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 34
[2023-04-01 06:18:12,090 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 06:18:12,099 INFO  L225             Difference]: With dead ends: 127
[2023-04-01 06:18:12,100 INFO  L226             Difference]: Without dead ends: 97
[2023-04-01 06:18:12,104 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=279, Invalid=1127, Unknown=0, NotChecked=0, Total=1406
[2023-04-01 06:18:12,107 INFO  L413           NwaCegarLoop]: 19 mSDtfsCounter, 369 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time
[2023-04-01 06:18:12,108 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [376 Valid, 80 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time]
[2023-04-01 06:18:12,124 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 97 states.
[2023-04-01 06:18:12,157 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 59.
[2023-04-01 06:18:12,158 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 59 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 34 states have internal predecessors, (39), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12)
[2023-04-01 06:18:12,159 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 64 transitions.
[2023-04-01 06:18:12,160 INFO  L78                 Accepts]: Start accepts. Automaton has 59 states and 64 transitions. Word has length 34
[2023-04-01 06:18:12,161 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 06:18:12,161 INFO  L495      AbstractCegarLoop]: Abstraction has 59 states and 64 transitions.
[2023-04-01 06:18:12,161 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 19 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 12 states have internal predecessors, (18), 8 states have call successors, (9), 6 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7)
[2023-04-01 06:18:12,162 INFO  L276                IsEmpty]: Start isEmpty. Operand 59 states and 64 transitions.
[2023-04-01 06:18:12,162 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 37
[2023-04-01 06:18:12,163 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 06:18:12,163 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]
[2023-04-01 06:18:12,163 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-04-01 06:18:12,164 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 06:18:12,164 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 06:18:12,164 INFO  L85        PathProgramCache]: Analyzing trace with hash -244985449, now seen corresponding path program 1 times
[2023-04-01 06:18:12,165 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 06:18:12,165 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580562402]
[2023-04-01 06:18:12,165 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 06:18:12,165 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 06:18:12,234 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 06:18:12,593 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 06:18:12,593 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 06:18:12,593 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580562402]
[2023-04-01 06:18:12,593 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580562402] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 06:18:12,594 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 06:18:12,594 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11
[2023-04-01 06:18:12,594 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909096790]
[2023-04-01 06:18:12,594 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 06:18:12,595 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 11 states
[2023-04-01 06:18:12,595 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 06:18:12,596 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2023-04-01 06:18:12,596 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110
[2023-04-01 06:18:12,597 INFO  L87              Difference]: Start difference. First operand 59 states and 64 transitions. Second operand  has 11 states, 7 states have (on average 2.857142857142857) internal successors, (20), 9 states have internal predecessors, (20), 5 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7)
[2023-04-01 06:18:12,900 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 06:18:12,900 INFO  L93              Difference]: Finished difference Result 114 states and 124 transitions.
[2023-04-01 06:18:12,901 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. 
[2023-04-01 06:18:12,901 INFO  L78                 Accepts]: Start accepts. Automaton has  has 11 states, 7 states have (on average 2.857142857142857) internal successors, (20), 9 states have internal predecessors, (20), 5 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 36
[2023-04-01 06:18:12,901 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 06:18:12,927 INFO  L225             Difference]: With dead ends: 114
[2023-04-01 06:18:12,928 INFO  L226             Difference]: Without dead ends: 84
[2023-04-01 06:18:12,929 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 06:18:12,930 INFO  L413           NwaCegarLoop]: 21 mSDtfsCounter, 99 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2023-04-01 06:18:12,930 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 84 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2023-04-01 06:18:12,931 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 84 states.
[2023-04-01 06:18:12,949 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 59.
[2023-04-01 06:18:12,950 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 59 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 34 states have internal predecessors, (38), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12)
[2023-04-01 06:18:12,952 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions.
[2023-04-01 06:18:12,952 INFO  L78                 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 36
[2023-04-01 06:18:12,952 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 06:18:12,953 INFO  L495      AbstractCegarLoop]: Abstraction has 59 states and 63 transitions.
[2023-04-01 06:18:12,953 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 11 states, 7 states have (on average 2.857142857142857) internal successors, (20), 9 states have internal predecessors, (20), 5 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7)
[2023-04-01 06:18:12,953 INFO  L276                IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions.
[2023-04-01 06:18:12,954 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 37
[2023-04-01 06:18:12,954 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 06:18:12,954 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]
[2023-04-01 06:18:12,954 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-04-01 06:18:12,955 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 06:18:12,955 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 06:18:12,955 INFO  L85        PathProgramCache]: Analyzing trace with hash 569532350, now seen corresponding path program 1 times
[2023-04-01 06:18:12,955 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 06:18:12,955 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136226863]
[2023-04-01 06:18:12,955 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 06:18:12,956 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 06:18:13,024 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 06:18:14,077 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 06:18:14,077 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 06:18:14,078 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136226863]
[2023-04-01 06:18:14,078 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136226863] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 06:18:14,078 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 06:18:14,078 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18
[2023-04-01 06:18:14,078 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213021532]
[2023-04-01 06:18:14,078 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 06:18:14,079 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 18 states
[2023-04-01 06:18:14,079 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 06:18:14,080 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants.
[2023-04-01 06:18:14,080 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306
[2023-04-01 06:18:14,080 INFO  L87              Difference]: Start difference. First operand 59 states and 63 transitions. Second operand  has 18 states, 10 states have (on average 2.0) internal successors, (20), 11 states have internal predecessors, (20), 7 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7)
[2023-04-01 06:18:14,753 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 06:18:14,754 INFO  L93              Difference]: Finished difference Result 115 states and 124 transitions.
[2023-04-01 06:18:14,754 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. 
[2023-04-01 06:18:14,754 INFO  L78                 Accepts]: Start accepts. Automaton has  has 18 states, 10 states have (on average 2.0) internal successors, (20), 11 states have internal predecessors, (20), 7 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 36
[2023-04-01 06:18:14,755 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 06:18:14,756 INFO  L225             Difference]: With dead ends: 115
[2023-04-01 06:18:14,756 INFO  L226             Difference]: Without dead ends: 86
[2023-04-01 06:18:14,757 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=221, Invalid=709, Unknown=0, NotChecked=0, Total=930
[2023-04-01 06:18:14,757 INFO  L413           NwaCegarLoop]: 21 mSDtfsCounter, 221 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2023-04-01 06:18:14,758 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 113 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time]
[2023-04-01 06:18:14,759 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 86 states.
[2023-04-01 06:18:14,782 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 59.
[2023-04-01 06:18:14,783 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 59 states, 33 states have (on average 1.121212121212121) internal successors, (37), 34 states have internal predecessors, (37), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12)
[2023-04-01 06:18:14,785 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions.
[2023-04-01 06:18:14,786 INFO  L78                 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 36
[2023-04-01 06:18:14,786 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 06:18:14,786 INFO  L495      AbstractCegarLoop]: Abstraction has 59 states and 62 transitions.
[2023-04-01 06:18:14,786 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 18 states, 10 states have (on average 2.0) internal successors, (20), 11 states have internal predecessors, (20), 7 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7)
[2023-04-01 06:18:14,787 INFO  L276                IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions.
[2023-04-01 06:18:14,789 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 38
[2023-04-01 06:18:14,790 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 06:18:14,790 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 06:18:14,791 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2023-04-01 06:18:14,791 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 06:18:14,792 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 06:18:14,792 INFO  L85        PathProgramCache]: Analyzing trace with hash 251783533, now seen corresponding path program 1 times
[2023-04-01 06:18:14,792 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 06:18:14,792 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837312934]
[2023-04-01 06:18:14,792 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 06:18:14,792 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 06:18:14,817 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 06:18:15,336 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 06:18:15,336 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 06:18:15,336 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837312934]
[2023-04-01 06:18:15,336 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837312934] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 06:18:15,337 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 06:18:15,337 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13
[2023-04-01 06:18:15,337 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045440497]
[2023-04-01 06:18:15,337 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 06:18:15,338 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 13 states
[2023-04-01 06:18:15,338 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 06:18:15,339 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants.
[2023-04-01 06:18:15,339 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156
[2023-04-01 06:18:15,339 INFO  L87              Difference]: Start difference. First operand 59 states and 62 transitions. Second operand  has 13 states, 8 states have (on average 2.625) internal successors, (21), 10 states have internal predecessors, (21), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7)
[2023-04-01 06:18:15,624 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 06:18:15,625 INFO  L93              Difference]: Finished difference Result 92 states and 102 transitions.
[2023-04-01 06:18:15,625 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. 
[2023-04-01 06:18:15,625 INFO  L78                 Accepts]: Start accepts. Automaton has  has 13 states, 8 states have (on average 2.625) internal successors, (21), 10 states have internal predecessors, (21), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 37
[2023-04-01 06:18:15,626 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 06:18:15,629 INFO  L225             Difference]: With dead ends: 92
[2023-04-01 06:18:15,630 INFO  L226             Difference]: Without dead ends: 90
[2023-04-01 06:18:15,630 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 06:18:15,639 INFO  L413           NwaCegarLoop]: 45 mSDtfsCounter, 35 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-04-01 06:18:15,640 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 472 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-04-01 06:18:15,643 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 90 states.
[2023-04-01 06:18:15,666 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 68.
[2023-04-01 06:18:15,667 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 68 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 41 states have internal predecessors, (43), 14 states have call successors, (14), 14 states have call predecessors, (14), 14 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14)
[2023-04-01 06:18:15,668 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 71 transitions.
[2023-04-01 06:18:15,668 INFO  L78                 Accepts]: Start accepts. Automaton has 68 states and 71 transitions. Word has length 37
[2023-04-01 06:18:15,670 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 06:18:15,670 INFO  L495      AbstractCegarLoop]: Abstraction has 68 states and 71 transitions.
[2023-04-01 06:18:15,670 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 13 states, 8 states have (on average 2.625) internal successors, (21), 10 states have internal predecessors, (21), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7)
[2023-04-01 06:18:15,670 INFO  L276                IsEmpty]: Start isEmpty. Operand 68 states and 71 transitions.
[2023-04-01 06:18:15,671 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 60
[2023-04-01 06:18:15,672 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 06:18:15,672 INFO  L195           NwaCegarLoop]: trace histogram [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 06:18:15,672 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2023-04-01 06:18:15,672 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 06:18:15,673 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 06:18:15,673 INFO  L85        PathProgramCache]: Analyzing trace with hash -1513964179, now seen corresponding path program 1 times
[2023-04-01 06:18:15,673 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 06:18:15,673 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442856832]
[2023-04-01 06:18:15,673 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 06:18:15,673 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 06:18:15,787 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 06:18:21,344 INFO  L134       CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2023-04-01 06:18:21,344 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 06:18:21,345 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442856832]
[2023-04-01 06:18:21,345 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442856832] provided 0 perfect and 1 imperfect interpolant sequences
[2023-04-01 06:18:21,345 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70505212]
[2023-04-01 06:18:21,345 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 06:18:21,345 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-04-01 06:18:21,345 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-04-01 06:18:21,351 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 06:18:21,374 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 06:18:21,512 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 06:18:21,518 INFO  L262         TraceCheckSpWp]: Trace formula consists of 526 conjuncts, 115 conjunts are in the unsatisfiable core
[2023-04-01 06:18:21,530 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-04-01 06:18:31,678 INFO  L134       CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-01 06:18:31,679 INFO  L327         TraceCheckSpWp]: Computing backward predicates...