/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.ufo.BOUNDED-6.pals.c


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


This is Ultimate 0.2.3-dev-f954360
[2023-04-03 01:49:43,186 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2023-04-03 01:49:43,187 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
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[2023-04-03 01:49:43,220 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2023-04-03 01:49:43,222 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2023-04-03 01:49:43,224 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
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[2023-04-03 01:49:43,232 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2023-04-03 01:49:43,232 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2023-04-03 01:49:43,232 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2023-04-03 01:49:43,233 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
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[2023-04-03 01:49:43,234 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2023-04-03 01:49:43,234 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2023-04-03 01:49:43,235 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2023-04-03 01:49:43,235 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
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[2023-04-03 01:49:43,240 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2023-04-03 01:49:43,241 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2023-04-03 01:49:43,242 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2023-04-03 01:49:43,248 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
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[2023-04-03 01:49:43,253 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2023-04-03 01:49:43,254 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2023-04-03 01:49:43,254 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
[2023-04-03 01:49:43,266 INFO  L113        SettingsManager]: Loading preferences was successful
[2023-04-03 01:49:43,267 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2023-04-03 01:49:43,267 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-04-03 01:49:43,267 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-04-03 01:49:43,267 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-04-03 01:49:43,267 INFO  L138        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-04-03 01:49:43,268 INFO  L138        SettingsManager]:  * User list type=DISABLED
[2023-04-03 01:49:43,268 INFO  L136        SettingsManager]: Preferences of Abstract Interpretation differ from their defaults:
[2023-04-03 01:49:43,268 INFO  L138        SettingsManager]:  * Explicit value domain=true
[2023-04-03 01:49:43,268 INFO  L138        SettingsManager]:  * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain
[2023-04-03 01:49:43,268 INFO  L138        SettingsManager]:  * Octagon Domain=false
[2023-04-03 01:49:43,268 INFO  L138        SettingsManager]:  * Abstract domain=CompoundDomain
[2023-04-03 01:49:43,268 INFO  L138        SettingsManager]:  * Check feasibility of abstract posts with an SMT solver=true
[2023-04-03 01:49:43,272 INFO  L138        SettingsManager]:  * Use the RCFG-of-the-future interface=true
[2023-04-03 01:49:43,272 INFO  L138        SettingsManager]:  * Interval Domain=false
[2023-04-03 01:49:43,272 INFO  L136        SettingsManager]: Preferences of Sifa differ from their defaults:
[2023-04-03 01:49:43,272 INFO  L138        SettingsManager]:  * Call Summarizer=TopInputCallSummarizer
[2023-04-03 01:49:43,273 INFO  L138        SettingsManager]:  * Simplification Technique=POLY_PAC
[2023-04-03 01:49:43,273 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-04-03 01:49:43,273 INFO  L138        SettingsManager]:  * sizeof long=4
[2023-04-03 01:49:43,274 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-04-03 01:49:43,274 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2023-04-03 01:49:43,274 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2023-04-03 01:49:43,274 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-04-03 01:49:43,274 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-04-03 01:49:43,274 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-04-03 01:49:43,274 INFO  L138        SettingsManager]:  * sizeof long double=12
[2023-04-03 01:49:43,274 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2023-04-03 01:49:43,274 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2023-04-03 01:49:43,274 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-04-03 01:49:43,275 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-04-03 01:49:43,275 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-04-03 01:49:43,275 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-04-03 01:49:43,275 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-04-03 01:49:43,275 INFO  L138        SettingsManager]:  * Abstract interpretation Mode=USE_PREDICATES
[2023-04-03 01:49:43,275 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-04-03 01:49:43,275 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2023-04-03 01:49:43,275 INFO  L138        SettingsManager]:  * Trace refinement strategy=SIFA_TAIPAN
[2023-04-03 01:49:43,275 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-04-03 01:49:43,275 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-04-03 01:49:43,275 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2023-04-03 01:49:43,276 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain
[2023-04-03 01:49:43,464 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-04-03 01:49:43,479 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-04-03 01:49:43,481 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-04-03 01:49:43,482 INFO  L271        PluginConnector]: Initializing CDTParser...
[2023-04-03 01:49:43,483 INFO  L275        PluginConnector]: CDTParser initialized
[2023-04-03 01:49:43,483 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr.3.ufo.BOUNDED-6.pals.c
[2023-04-03 01:49:44,452 INFO  L500              CDTParser]: Created temporary CDT project at NULL
[2023-04-03 01:49:44,637 INFO  L351              CDTParser]: Found 1 translation units.
[2023-04-03 01:49:44,638 INFO  L172              CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.3.ufo.BOUNDED-6.pals.c
[2023-04-03 01:49:44,647 INFO  L394              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b362563d7/10a63bab0702461ebbeed5768b7ab905/FLAGf16519ffe
[2023-04-03 01:49:44,658 INFO  L402              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b362563d7/10a63bab0702461ebbeed5768b7ab905
[2023-04-03 01:49:44,660 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-04-03 01:49:44,661 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2023-04-03 01:49:44,661 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-04-03 01:49:44,661 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-04-03 01:49:44,663 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-04-03 01:49:44,664 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 01:49:44" (1/1) ...
[2023-04-03 01:49:44,664 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2af7ce48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:49:44, skipping insertion in model container
[2023-04-03 01:49:44,665 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 01:49:44" (1/1) ...
[2023-04-03 01:49:44,669 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2023-04-03 01:49:44,684 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2023-04-03 01:49:44,822 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.ufo.BOUNDED-6.pals.c[5947,5960]
[2023-04-03 01:49:44,825 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-04-03 01:49:44,832 INFO  L203         MainTranslator]: Completed pre-run
[2023-04-03 01:49:44,857 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.ufo.BOUNDED-6.pals.c[5947,5960]
[2023-04-03 01:49:44,857 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-04-03 01:49:44,867 INFO  L208         MainTranslator]: Completed translation
[2023-04-03 01:49:44,868 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:49:44 WrapperNode
[2023-04-03 01:49:44,868 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-04-03 01:49:44,869 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-04-03 01:49:44,869 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2023-04-03 01:49:44,869 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2023-04-03 01:49:44,876 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:49:44" (1/1) ...
[2023-04-03 01:49:44,877 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:49:44" (1/1) ...
[2023-04-03 01:49:44,882 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:49:44" (1/1) ...
[2023-04-03 01:49:44,882 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:49:44" (1/1) ...
[2023-04-03 01:49:44,887 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:49:44" (1/1) ...
[2023-04-03 01:49:44,899 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:49:44" (1/1) ...
[2023-04-03 01:49:44,900 INFO  L185        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:49:44" (1/1) ...
[2023-04-03 01:49:44,901 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:49:44" (1/1) ...
[2023-04-03 01:49:44,903 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-04-03 01:49:44,904 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-04-03 01:49:44,904 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2023-04-03 01:49:44,904 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2023-04-03 01:49:44,904 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:49:44" (1/1) ...
[2023-04-03 01:49:44,912 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-04-03 01:49:44,918 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-04-03 01:49:44,932 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)
[2023-04-03 01:49:44,934 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
[2023-04-03 01:49:44,957 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2023-04-03 01:49:44,957 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-04-03 01:49:44,957 INFO  L138     BoogieDeclarations]: Found implementation of procedure reach_error
[2023-04-03 01:49:44,957 INFO  L138     BoogieDeclarations]: Found implementation of procedure node1
[2023-04-03 01:49:44,957 INFO  L138     BoogieDeclarations]: Found implementation of procedure node2
[2023-04-03 01:49:44,957 INFO  L138     BoogieDeclarations]: Found implementation of procedure node3
[2023-04-03 01:49:44,957 INFO  L138     BoogieDeclarations]: Found implementation of procedure init
[2023-04-03 01:49:44,957 INFO  L138     BoogieDeclarations]: Found implementation of procedure check
[2023-04-03 01:49:44,958 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2023-04-03 01:49:44,958 INFO  L138     BoogieDeclarations]: Found implementation of procedure assert
[2023-04-03 01:49:44,958 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2023-04-03 01:49:44,958 INFO  L130     BoogieDeclarations]: Found specification of procedure __assert_fail
[2023-04-03 01:49:44,958 INFO  L130     BoogieDeclarations]: Found specification of procedure reach_error
[2023-04-03 01:49:44,958 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-04-03 01:49:44,958 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool
[2023-04-03 01:49:44,958 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char
[2023-04-03 01:49:44,958 INFO  L130     BoogieDeclarations]: Found specification of procedure assert
[2023-04-03 01:49:44,958 INFO  L130     BoogieDeclarations]: Found specification of procedure read
[2023-04-03 01:49:44,958 INFO  L130     BoogieDeclarations]: Found specification of procedure write
[2023-04-03 01:49:44,958 INFO  L130     BoogieDeclarations]: Found specification of procedure node1
[2023-04-03 01:49:44,959 INFO  L130     BoogieDeclarations]: Found specification of procedure node2
[2023-04-03 01:49:44,959 INFO  L130     BoogieDeclarations]: Found specification of procedure node3
[2023-04-03 01:49:44,959 INFO  L130     BoogieDeclarations]: Found specification of procedure init
[2023-04-03 01:49:44,959 INFO  L130     BoogieDeclarations]: Found specification of procedure check
[2023-04-03 01:49:44,959 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2023-04-03 01:49:44,959 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2023-04-03 01:49:44,959 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2023-04-03 01:49:44,959 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-04-03 01:49:44,959 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2023-04-03 01:49:44,959 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2023-04-03 01:49:44,959 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2023-04-03 01:49:45,036 INFO  L236             CfgBuilder]: Building ICFG
[2023-04-03 01:49:45,038 INFO  L262             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-04-03 01:49:45,365 INFO  L277             CfgBuilder]: Performing block encoding
[2023-04-03 01:49:45,512 INFO  L297             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-04-03 01:49:45,513 INFO  L302             CfgBuilder]: Removed 1 assume(true) statements.
[2023-04-03 01:49:45,516 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 01:49:45 BoogieIcfgContainer
[2023-04-03 01:49:45,516 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-04-03 01:49:45,519 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-04-03 01:49:45,520 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2023-04-03 01:49:45,522 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2023-04-03 01:49:45,522 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.04 01:49:44" (1/3) ...
[2023-04-03 01:49:45,523 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@164a338a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 01:49:45, skipping insertion in model container
[2023-04-03 01:49:45,523 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:49:44" (2/3) ...
[2023-04-03 01:49:45,523 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@164a338a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 01:49:45, skipping insertion in model container
[2023-04-03 01:49:45,523 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 01:49:45" (3/3) ...
[2023-04-03 01:49:45,524 INFO  L112   eAbstractionObserver]: Analyzing ICFG pals_lcr.3.ufo.BOUNDED-6.pals.c
[2023-04-03 01:49:45,536 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-04-03 01:49:45,537 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-04-03 01:49:45,584 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-04-03 01:49:45,589 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;@495229af, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2023-04-03 01:49:45,590 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-04-03 01:49:45,593 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 40 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 23 states have internal predecessors, (28), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8)
[2023-04-03 01:49:45,599 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 31
[2023-04-03 01:49:45,600 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-03 01:49:45,600 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]
[2023-04-03 01:49:45,601 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-03 01:49:45,606 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-03 01:49:45,607 INFO  L85        PathProgramCache]: Analyzing trace with hash 543618519, now seen corresponding path program 1 times
[2023-04-03 01:49:45,613 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-03 01:49:45,613 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878431175]
[2023-04-03 01:49:45,614 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-03 01:49:45,614 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-03 01:49:45,841 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-03 01:49:46,921 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-03 01:49:46,922 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-03 01:49:46,922 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878431175]
[2023-04-03 01:49:46,922 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878431175] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-03 01:49:46,922 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-03 01:49:46,923 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15
[2023-04-03 01:49:46,924 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074049241]
[2023-04-03 01:49:46,924 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-03 01:49:46,927 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 15 states
[2023-04-03 01:49:46,927 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-03 01:49:46,961 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants.
[2023-04-03 01:49:46,963 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210
[2023-04-03 01:49:46,964 INFO  L87              Difference]: Start difference. First operand  has 40 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 23 states have internal predecessors, (28), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand  has 15 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 6 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6)
[2023-04-03 01:49:47,404 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-03 01:49:47,405 INFO  L93              Difference]: Finished difference Result 125 states and 145 transitions.
[2023-04-03 01:49:47,406 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. 
[2023-04-03 01:49:47,407 INFO  L78                 Accepts]: Start accepts. Automaton has  has 15 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 6 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 30
[2023-04-03 01:49:47,407 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-03 01:49:47,412 INFO  L225             Difference]: With dead ends: 125
[2023-04-03 01:49:47,412 INFO  L226             Difference]: Without dead ends: 82
[2023-04-03 01:49:47,414 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=368, Unknown=0, NotChecked=0, Total=506
[2023-04-03 01:49:47,417 INFO  L413           NwaCegarLoop]: 24 mSDtfsCounter, 239 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2023-04-03 01:49:47,417 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 128 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time]
[2023-04-03 01:49:47,429 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 82 states.
[2023-04-03 01:49:47,447 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 56.
[2023-04-03 01:49:47,448 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 56 states, 32 states have (on average 1.1875) internal successors, (38), 33 states have internal predecessors, (38), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12)
[2023-04-03 01:49:47,448 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions.
[2023-04-03 01:49:47,449 INFO  L78                 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 30
[2023-04-03 01:49:47,449 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-03 01:49:47,450 INFO  L495      AbstractCegarLoop]: Abstraction has 56 states and 62 transitions.
[2023-04-03 01:49:47,450 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 15 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 6 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6)
[2023-04-03 01:49:47,450 INFO  L276                IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions.
[2023-04-03 01:49:47,451 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 33
[2023-04-03 01:49:47,451 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-03 01:49:47,451 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]
[2023-04-03 01:49:47,451 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-04-03 01:49:47,451 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-03 01:49:47,452 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-03 01:49:47,452 INFO  L85        PathProgramCache]: Analyzing trace with hash -857202552, now seen corresponding path program 1 times
[2023-04-03 01:49:47,452 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-03 01:49:47,452 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039275804]
[2023-04-03 01:49:47,452 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-03 01:49:47,452 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-03 01:49:47,495 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-03 01:49:47,732 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-03 01:49:47,732 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-03 01:49:47,732 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039275804]
[2023-04-03 01:49:47,732 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039275804] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-03 01:49:47,732 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-03 01:49:47,733 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9
[2023-04-03 01:49:47,733 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033147872]
[2023-04-03 01:49:47,733 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-03 01:49:47,734 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 9 states
[2023-04-03 01:49:47,734 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-03 01:49:47,734 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2023-04-03 01:49:47,734 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72
[2023-04-03 01:49:47,735 INFO  L87              Difference]: Start difference. First operand 56 states and 62 transitions. Second operand  has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6)
[2023-04-03 01:49:47,918 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-03 01:49:47,920 INFO  L93              Difference]: Finished difference Result 116 states and 127 transitions.
[2023-04-03 01:49:47,921 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. 
[2023-04-03 01:49:47,925 INFO  L78                 Accepts]: Start accepts. Automaton has  has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 32
[2023-04-03 01:49:47,926 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-03 01:49:47,928 INFO  L225             Difference]: With dead ends: 116
[2023-04-03 01:49:47,928 INFO  L226             Difference]: Without dead ends: 85
[2023-04-03 01:49:47,932 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182
[2023-04-03 01:49:47,934 INFO  L413           NwaCegarLoop]: 21 mSDtfsCounter, 67 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-04-03 01:49:47,935 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 73 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-04-03 01:49:47,937 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 85 states.
[2023-04-03 01:49:47,948 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 56.
[2023-04-03 01:49:47,949 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 56 states, 32 states have (on average 1.15625) internal successors, (37), 33 states have internal predecessors, (37), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11)
[2023-04-03 01:49:47,952 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions.
[2023-04-03 01:49:47,953 INFO  L78                 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 32
[2023-04-03 01:49:47,953 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-03 01:49:47,953 INFO  L495      AbstractCegarLoop]: Abstraction has 56 states and 60 transitions.
[2023-04-03 01:49:47,953 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6)
[2023-04-03 01:49:47,953 INFO  L276                IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions.
[2023-04-03 01:49:47,954 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 33
[2023-04-03 01:49:47,954 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-03 01:49:47,954 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]
[2023-04-03 01:49:47,954 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-04-03 01:49:47,954 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-03 01:49:47,955 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-03 01:49:47,955 INFO  L85        PathProgramCache]: Analyzing trace with hash 2137120959, now seen corresponding path program 1 times
[2023-04-03 01:49:47,956 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-03 01:49:47,956 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719289414]
[2023-04-03 01:49:47,956 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-03 01:49:47,956 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-03 01:49:47,997 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-03 01:49:48,621 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-03 01:49:48,621 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-03 01:49:48,621 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719289414]
[2023-04-03 01:49:48,621 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719289414] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-03 01:49:48,621 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-03 01:49:48,621 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16
[2023-04-03 01:49:48,621 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349933677]
[2023-04-03 01:49:48,622 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-03 01:49:48,622 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 16 states
[2023-04-03 01:49:48,622 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-03 01:49:48,622 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants.
[2023-04-03 01:49:48,623 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240
[2023-04-03 01:49:48,623 INFO  L87              Difference]: Start difference. First operand 56 states and 60 transitions. Second operand  has 16 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 7 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6)
[2023-04-03 01:49:49,194 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-03 01:49:49,195 INFO  L93              Difference]: Finished difference Result 120 states and 131 transitions.
[2023-04-03 01:49:49,195 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. 
[2023-04-03 01:49:49,195 INFO  L78                 Accepts]: Start accepts. Automaton has  has 16 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 7 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 32
[2023-04-03 01:49:49,195 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-03 01:49:49,197 INFO  L225             Difference]: With dead ends: 120
[2023-04-03 01:49:49,197 INFO  L226             Difference]: Without dead ends: 90
[2023-04-03 01:49:49,197 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=232, Invalid=890, Unknown=0, NotChecked=0, Total=1122
[2023-04-03 01:49:49,198 INFO  L413           NwaCegarLoop]: 20 mSDtfsCounter, 201 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2023-04-03 01:49:49,198 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 92 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2023-04-03 01:49:49,199 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 90 states.
[2023-04-03 01:49:49,209 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 56.
[2023-04-03 01:49:49,209 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 56 states, 32 states have (on average 1.125) internal successors, (36), 33 states have internal predecessors, (36), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11)
[2023-04-03 01:49:49,209 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 59 transitions.
[2023-04-03 01:49:49,210 INFO  L78                 Accepts]: Start accepts. Automaton has 56 states and 59 transitions. Word has length 32
[2023-04-03 01:49:49,210 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-03 01:49:49,210 INFO  L495      AbstractCegarLoop]: Abstraction has 56 states and 59 transitions.
[2023-04-03 01:49:49,210 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 16 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 7 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6)
[2023-04-03 01:49:49,210 INFO  L276                IsEmpty]: Start isEmpty. Operand 56 states and 59 transitions.
[2023-04-03 01:49:49,210 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 34
[2023-04-03 01:49:49,211 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-03 01:49:49,211 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]
[2023-04-03 01:49:49,211 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2023-04-03 01:49:49,211 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-03 01:49:49,211 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-03 01:49:49,211 INFO  L85        PathProgramCache]: Analyzing trace with hash -1414527396, now seen corresponding path program 1 times
[2023-04-03 01:49:49,211 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-03 01:49:49,211 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236169240]
[2023-04-03 01:49:49,211 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-03 01:49:49,212 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-03 01:49:49,223 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-03 01:49:49,357 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-03 01:49:49,357 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-03 01:49:49,357 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236169240]
[2023-04-03 01:49:49,357 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236169240] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-03 01:49:49,357 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-03 01:49:49,357 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9
[2023-04-03 01:49:49,357 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020240743]
[2023-04-03 01:49:49,358 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-03 01:49:49,358 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 9 states
[2023-04-03 01:49:49,358 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-03 01:49:49,358 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2023-04-03 01:49:49,358 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72
[2023-04-03 01:49:49,358 INFO  L87              Difference]: Start difference. First operand 56 states and 59 transitions. Second operand  has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6)
[2023-04-03 01:49:49,467 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-03 01:49:49,468 INFO  L93              Difference]: Finished difference Result 91 states and 101 transitions.
[2023-04-03 01:49:49,468 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. 
[2023-04-03 01:49:49,468 INFO  L78                 Accepts]: Start accepts. Automaton has  has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 33
[2023-04-03 01:49:49,468 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-03 01:49:49,469 INFO  L225             Difference]: With dead ends: 91
[2023-04-03 01:49:49,469 INFO  L226             Difference]: Without dead ends: 89
[2023-04-03 01:49:49,469 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240
[2023-04-03 01:49:49,470 INFO  L413           NwaCegarLoop]: 44 mSDtfsCounter, 35 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-04-03 01:49:49,470 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 321 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-04-03 01:49:49,470 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 89 states.
[2023-04-03 01:49:49,481 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 65.
[2023-04-03 01:49:49,481 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 65 states, 38 states have (on average 1.105263157894737) internal successors, (42), 40 states have internal predecessors, (42), 13 states have call successors, (13), 13 states have call predecessors, (13), 13 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13)
[2023-04-03 01:49:49,482 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions.
[2023-04-03 01:49:49,482 INFO  L78                 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 33
[2023-04-03 01:49:49,482 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-03 01:49:49,482 INFO  L495      AbstractCegarLoop]: Abstraction has 65 states and 68 transitions.
[2023-04-03 01:49:49,482 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6)
[2023-04-03 01:49:49,482 INFO  L276                IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions.
[2023-04-03 01:49:49,483 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 57
[2023-04-03 01:49:49,483 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-03 01:49:49,483 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]
[2023-04-03 01:49:49,483 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2023-04-03 01:49:49,483 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-03 01:49:49,484 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-03 01:49:49,484 INFO  L85        PathProgramCache]: Analyzing trace with hash -186027022, now seen corresponding path program 1 times
[2023-04-03 01:49:49,484 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-03 01:49:49,484 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455715725]
[2023-04-03 01:49:49,484 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-03 01:49:49,484 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-03 01:49:49,539 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-03 01:49:52,264 INFO  L134       CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2023-04-03 01:49:52,264 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-03 01:49:52,264 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455715725]
[2023-04-03 01:49:52,265 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455715725] provided 0 perfect and 1 imperfect interpolant sequences
[2023-04-03 01:49:52,265 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893193230]
[2023-04-03 01:49:52,265 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-03 01:49:52,265 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-04-03 01:49:52,265 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-04-03 01:49:52,279 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)
[2023-04-03 01:49:52,283 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2023-04-03 01:49:52,398 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-03 01:49:52,419 INFO  L262         TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 102 conjunts are in the unsatisfiable core
[2023-04-03 01:49:52,427 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-04-03 01:50:01,325 INFO  L134       CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-03 01:50:01,325 INFO  L327         TraceCheckSpWp]: Computing backward predicates...