/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 IntervalDomain -i ../sv-benchmarks/c/seq-mthreaded/pals_lcr.5.1.ufo.BOUNDED-10.pals.c


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


This is Ultimate 0.2.3-dev-f954360
[2023-04-01 00:14:36,906 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2023-04-01 00:14:36,907 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
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[2023-04-01 00:14:36,955 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
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[2023-04-01 00:14:36,967 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
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[2023-04-01 00:14:36,968 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
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[2023-04-01 00:14:36,972 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2023-04-01 00:14:36,972 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
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[2023-04-01 00:14:36,974 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
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[2023-04-01 00:14:36,982 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2023-04-01 00:14:36,988 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
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[2023-04-01 00:14:36,994 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2023-04-01 00:14:36,995 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2023-04-01 00:14:36,996 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 00:14:37,020 INFO  L113        SettingsManager]: Loading preferences was successful
[2023-04-01 00:14:37,021 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2023-04-01 00:14:37,021 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-04-01 00:14:37,021 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-04-01 00:14:37,022 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-04-01 00:14:37,022 INFO  L138        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-04-01 00:14:37,022 INFO  L138        SettingsManager]:  * User list type=DISABLED
[2023-04-01 00:14:37,022 INFO  L136        SettingsManager]: Preferences of Abstract Interpretation differ from their defaults:
[2023-04-01 00:14:37,022 INFO  L138        SettingsManager]:  * Explicit value domain=true
[2023-04-01 00:14:37,022 INFO  L138        SettingsManager]:  * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain
[2023-04-01 00:14:37,023 INFO  L138        SettingsManager]:  * Octagon Domain=false
[2023-04-01 00:14:37,023 INFO  L138        SettingsManager]:  * Abstract domain=CompoundDomain
[2023-04-01 00:14:37,023 INFO  L138        SettingsManager]:  * Check feasibility of abstract posts with an SMT solver=true
[2023-04-01 00:14:37,023 INFO  L138        SettingsManager]:  * Use the RCFG-of-the-future interface=true
[2023-04-01 00:14:37,023 INFO  L138        SettingsManager]:  * Interval Domain=false
[2023-04-01 00:14:37,023 INFO  L136        SettingsManager]: Preferences of Sifa differ from their defaults:
[2023-04-01 00:14:37,024 INFO  L138        SettingsManager]:  * Call Summarizer=TopInputCallSummarizer
[2023-04-01 00:14:37,024 INFO  L138        SettingsManager]:  * Simplification Technique=POLY_PAC
[2023-04-01 00:14:37,024 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-04-01 00:14:37,024 INFO  L138        SettingsManager]:  * sizeof long=4
[2023-04-01 00:14:37,024 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-04-01 00:14:37,024 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2023-04-01 00:14:37,024 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2023-04-01 00:14:37,025 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-04-01 00:14:37,025 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-04-01 00:14:37,025 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-04-01 00:14:37,025 INFO  L138        SettingsManager]:  * sizeof long double=12
[2023-04-01 00:14:37,025 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2023-04-01 00:14:37,025 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2023-04-01 00:14:37,025 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-04-01 00:14:37,025 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-04-01 00:14:37,025 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-04-01 00:14:37,025 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-04-01 00:14:37,026 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-04-01 00:14:37,026 INFO  L138        SettingsManager]:  * Abstract interpretation Mode=USE_PREDICATES
[2023-04-01 00:14:37,026 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-04-01 00:14:37,026 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2023-04-01 00:14:37,026 INFO  L138        SettingsManager]:  * Trace refinement strategy=SIFA_TAIPAN
[2023-04-01 00:14:37,026 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-04-01 00:14:37,026 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-04-01 00:14:37,026 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2023-04-01 00:14:37,026 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain
[2023-04-01 00:14:37,263 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-04-01 00:14:37,284 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-04-01 00:14:37,286 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-04-01 00:14:37,287 INFO  L271        PluginConnector]: Initializing CDTParser...
[2023-04-01 00:14:37,288 INFO  L275        PluginConnector]: CDTParser initialized
[2023-04-01 00:14:37,289 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr.5.1.ufo.BOUNDED-10.pals.c
[2023-04-01 00:14:38,519 INFO  L500              CDTParser]: Created temporary CDT project at NULL
[2023-04-01 00:14:38,694 INFO  L351              CDTParser]: Found 1 translation units.
[2023-04-01 00:14:38,694 INFO  L172              CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.5.1.ufo.BOUNDED-10.pals.c
[2023-04-01 00:14:38,701 INFO  L394              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b595a6816/d05a9c051c754ff18f9c7c611fd21211/FLAG120ffdcdc
[2023-04-01 00:14:38,712 INFO  L402              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b595a6816/d05a9c051c754ff18f9c7c611fd21211
[2023-04-01 00:14:38,714 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-04-01 00:14:38,715 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2023-04-01 00:14:38,715 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-04-01 00:14:38,716 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-04-01 00:14:38,718 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-04-01 00:14:38,719 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:14:38" (1/1) ...
[2023-04-01 00:14:38,719 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69f8f819 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:14:38, skipping insertion in model container
[2023-04-01 00:14:38,719 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:14:38" (1/1) ...
[2023-04-01 00:14:38,724 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2023-04-01 00:14:38,744 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2023-04-01 00:14:38,888 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.5.1.ufo.BOUNDED-10.pals.c[11270,11283]
[2023-04-01 00:14:38,891 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-04-01 00:14:38,899 INFO  L203         MainTranslator]: Completed pre-run
[2023-04-01 00:14:38,958 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.5.1.ufo.BOUNDED-10.pals.c[11270,11283]
[2023-04-01 00:14:38,959 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-04-01 00:14:38,978 INFO  L208         MainTranslator]: Completed translation
[2023-04-01 00:14:38,979 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:14:38 WrapperNode
[2023-04-01 00:14:38,979 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-04-01 00:14:38,980 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-04-01 00:14:38,980 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2023-04-01 00:14:38,980 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2023-04-01 00:14:38,988 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:14:38" (1/1) ...
[2023-04-01 00:14:38,988 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:14:38" (1/1) ...
[2023-04-01 00:14:39,006 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:14:38" (1/1) ...
[2023-04-01 00:14:39,007 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:14:38" (1/1) ...
[2023-04-01 00:14:39,014 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:14:38" (1/1) ...
[2023-04-01 00:14:39,035 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:14:38" (1/1) ...
[2023-04-01 00:14:39,043 INFO  L185        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:14:38" (1/1) ...
[2023-04-01 00:14:39,044 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:14:38" (1/1) ...
[2023-04-01 00:14:39,046 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-04-01 00:14:39,047 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-04-01 00:14:39,047 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2023-04-01 00:14:39,047 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2023-04-01 00:14:39,048 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:14:38" (1/1) ...
[2023-04-01 00:14:39,059 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-04-01 00:14:39,068 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-04-01 00:14:39,102 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 00:14:39,169 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 00:14:39,196 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2023-04-01 00:14:39,196 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-04-01 00:14:39,197 INFO  L138     BoogieDeclarations]: Found implementation of procedure reach_error
[2023-04-01 00:14:39,198 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2023-04-01 00:14:39,198 INFO  L138     BoogieDeclarations]: Found implementation of procedure node1
[2023-04-01 00:14:39,198 INFO  L138     BoogieDeclarations]: Found implementation of procedure node2
[2023-04-01 00:14:39,198 INFO  L138     BoogieDeclarations]: Found implementation of procedure node3
[2023-04-01 00:14:39,198 INFO  L138     BoogieDeclarations]: Found implementation of procedure node4
[2023-04-01 00:14:39,198 INFO  L138     BoogieDeclarations]: Found implementation of procedure node5
[2023-04-01 00:14:39,198 INFO  L138     BoogieDeclarations]: Found implementation of procedure init
[2023-04-01 00:14:39,198 INFO  L138     BoogieDeclarations]: Found implementation of procedure check
[2023-04-01 00:14:39,198 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2023-04-01 00:14:39,198 INFO  L138     BoogieDeclarations]: Found implementation of procedure assert
[2023-04-01 00:14:39,198 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2023-04-01 00:14:39,198 INFO  L130     BoogieDeclarations]: Found specification of procedure __assert_fail
[2023-04-01 00:14:39,199 INFO  L130     BoogieDeclarations]: Found specification of procedure reach_error
[2023-04-01 00:14:39,199 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-04-01 00:14:39,199 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool
[2023-04-01 00:14:39,199 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char
[2023-04-01 00:14:39,199 INFO  L130     BoogieDeclarations]: Found specification of procedure assert
[2023-04-01 00:14:39,199 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2023-04-01 00:14:39,199 INFO  L130     BoogieDeclarations]: Found specification of procedure read
[2023-04-01 00:14:39,199 INFO  L130     BoogieDeclarations]: Found specification of procedure write
[2023-04-01 00:14:39,199 INFO  L130     BoogieDeclarations]: Found specification of procedure node1
[2023-04-01 00:14:39,199 INFO  L130     BoogieDeclarations]: Found specification of procedure node2
[2023-04-01 00:14:39,199 INFO  L130     BoogieDeclarations]: Found specification of procedure node3
[2023-04-01 00:14:39,199 INFO  L130     BoogieDeclarations]: Found specification of procedure node4
[2023-04-01 00:14:39,199 INFO  L130     BoogieDeclarations]: Found specification of procedure node5
[2023-04-01 00:14:39,199 INFO  L130     BoogieDeclarations]: Found specification of procedure init
[2023-04-01 00:14:39,199 INFO  L130     BoogieDeclarations]: Found specification of procedure check
[2023-04-01 00:14:39,199 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2023-04-01 00:14:39,200 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2023-04-01 00:14:39,200 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2023-04-01 00:14:39,200 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-04-01 00:14:39,200 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2023-04-01 00:14:39,200 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2023-04-01 00:14:39,200 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2023-04-01 00:14:39,267 INFO  L236             CfgBuilder]: Building ICFG
[2023-04-01 00:14:39,268 INFO  L262             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-04-01 00:14:39,588 INFO  L277             CfgBuilder]: Performing block encoding
[2023-04-01 00:14:39,968 INFO  L297             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-04-01 00:14:39,969 INFO  L302             CfgBuilder]: Removed 1 assume(true) statements.
[2023-04-01 00:14:39,971 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:14:39 BoogieIcfgContainer
[2023-04-01 00:14:39,971 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-04-01 00:14:39,973 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-04-01 00:14:39,973 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2023-04-01 00:14:39,975 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2023-04-01 00:14:39,976 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 12:14:38" (1/3) ...
[2023-04-01 00:14:39,976 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f9c2b80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:14:39, skipping insertion in model container
[2023-04-01 00:14:39,976 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:14:38" (2/3) ...
[2023-04-01 00:14:39,977 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f9c2b80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:14:39, skipping insertion in model container
[2023-04-01 00:14:39,977 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:14:39" (3/3) ...
[2023-04-01 00:14:39,978 INFO  L112   eAbstractionObserver]: Analyzing ICFG pals_lcr.5.1.ufo.BOUNDED-10.pals.c
[2023-04-01 00:14:39,990 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-04-01 00:14:39,991 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-04-01 00:14:40,037 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-04-01 00:14:40,042 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;@70f6564f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2023-04-01 00:14:40,042 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-04-01 00:14:40,045 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 50 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 27 states have internal predecessors, (32), 11 states have call successors, (11), 11 states have call predecessors, (11), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11)
[2023-04-01 00:14:40,052 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 41
[2023-04-01 00:14:40,053 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 00:14:40,053 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-01 00:14:40,054 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 00:14:40,058 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 00:14:40,058 INFO  L85        PathProgramCache]: Analyzing trace with hash 572119877, now seen corresponding path program 1 times
[2023-04-01 00:14:40,064 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 00:14:40,065 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848626754]
[2023-04-01 00:14:40,065 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 00:14:40,065 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 00:14:40,379 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 00:14:42,918 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 00:14:42,919 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 00:14:42,919 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848626754]
[2023-04-01 00:14:42,920 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848626754] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 00:14:42,920 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 00:14:42,920 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25
[2023-04-01 00:14:42,921 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108688497]
[2023-04-01 00:14:42,922 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 00:14:42,926 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 25 states
[2023-04-01 00:14:42,926 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 00:14:42,954 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants.
[2023-04-01 00:14:42,956 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600
[2023-04-01 00:14:42,958 INFO  L87              Difference]: Start difference. First operand  has 50 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 27 states have internal predecessors, (32), 11 states have call successors, (11), 11 states have call predecessors, (11), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand  has 25 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 10 states have call successors, (11), 8 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9)
[2023-04-01 00:14:43,927 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 00:14:43,927 INFO  L93              Difference]: Finished difference Result 165 states and 187 transitions.
[2023-04-01 00:14:43,928 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. 
[2023-04-01 00:14:43,929 INFO  L78                 Accepts]: Start accepts. Automaton has  has 25 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 10 states have call successors, (11), 8 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 40
[2023-04-01 00:14:43,930 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 00:14:43,936 INFO  L225             Difference]: With dead ends: 165
[2023-04-01 00:14:43,936 INFO  L226             Difference]: Without dead ends: 113
[2023-04-01 00:14:43,939 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=394, Invalid=1676, Unknown=0, NotChecked=0, Total=2070
[2023-04-01 00:14:43,941 INFO  L413           NwaCegarLoop]: 26 mSDtfsCounter, 575 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 309 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 584 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 309 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time
[2023-04-01 00:14:43,942 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [584 Valid, 149 Invalid, 899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [309 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time]
[2023-04-01 00:14:43,954 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 113 states.
[2023-04-01 00:14:44,002 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 72.
[2023-04-01 00:14:44,004 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 72 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 39 states have internal predecessors, (44), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16)
[2023-04-01 00:14:44,006 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 77 transitions.
[2023-04-01 00:14:44,007 INFO  L78                 Accepts]: Start accepts. Automaton has 72 states and 77 transitions. Word has length 40
[2023-04-01 00:14:44,008 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 00:14:44,008 INFO  L495      AbstractCegarLoop]: Abstraction has 72 states and 77 transitions.
[2023-04-01 00:14:44,008 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 25 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 10 states have call successors, (11), 8 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9)
[2023-04-01 00:14:44,008 INFO  L276                IsEmpty]: Start isEmpty. Operand 72 states and 77 transitions.
[2023-04-01 00:14:44,009 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 43
[2023-04-01 00:14:44,009 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 00:14:44,009 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-01 00:14:44,009 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-04-01 00:14:44,009 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 00:14:44,010 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 00:14:44,010 INFO  L85        PathProgramCache]: Analyzing trace with hash -1643024366, now seen corresponding path program 1 times
[2023-04-01 00:14:44,010 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 00:14:44,010 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230439056]
[2023-04-01 00:14:44,010 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 00:14:44,010 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 00:14:44,053 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 00:14:44,346 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 00:14:44,346 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 00:14:44,346 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230439056]
[2023-04-01 00:14:44,346 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230439056] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 00:14:44,347 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 00:14:44,347 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11
[2023-04-01 00:14:44,347 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590556573]
[2023-04-01 00:14:44,347 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 00:14:44,348 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 11 states
[2023-04-01 00:14:44,348 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 00:14:44,349 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2023-04-01 00:14:44,349 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110
[2023-04-01 00:14:44,349 INFO  L87              Difference]: Start difference. First operand 72 states and 77 transitions. Second operand  has 11 states, 7 states have (on average 3.142857142857143) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9)
[2023-04-01 00:14:44,589 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 00:14:44,589 INFO  L93              Difference]: Finished difference Result 136 states and 146 transitions.
[2023-04-01 00:14:44,590 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. 
[2023-04-01 00:14:44,590 INFO  L78                 Accepts]: Start accepts. Automaton has  has 11 states, 7 states have (on average 3.142857142857143) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 42
[2023-04-01 00:14:44,590 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 00:14:44,591 INFO  L225             Difference]: With dead ends: 136
[2023-04-01 00:14:44,592 INFO  L226             Difference]: Without dead ends: 99
[2023-04-01 00:14:44,592 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272
[2023-04-01 00:14:44,593 INFO  L413           NwaCegarLoop]: 25 mSDtfsCounter, 76 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2023-04-01 00:14:44,593 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 108 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2023-04-01 00:14:44,594 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 99 states.
[2023-04-01 00:14:44,607 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 72.
[2023-04-01 00:14:44,608 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 72 states, 38 states have (on average 1.131578947368421) internal successors, (43), 39 states have internal predecessors, (43), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16)
[2023-04-01 00:14:44,608 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions.
[2023-04-01 00:14:44,609 INFO  L78                 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 42
[2023-04-01 00:14:44,609 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 00:14:44,609 INFO  L495      AbstractCegarLoop]: Abstraction has 72 states and 76 transitions.
[2023-04-01 00:14:44,609 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 11 states, 7 states have (on average 3.142857142857143) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9)
[2023-04-01 00:14:44,609 INFO  L276                IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions.
[2023-04-01 00:14:44,610 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 43
[2023-04-01 00:14:44,610 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 00:14:44,610 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-01 00:14:44,610 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-04-01 00:14:44,610 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 00:14:44,610 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 00:14:44,611 INFO  L85        PathProgramCache]: Analyzing trace with hash -1195686643, now seen corresponding path program 1 times
[2023-04-01 00:14:44,611 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 00:14:44,611 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282986709]
[2023-04-01 00:14:44,611 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 00:14:44,611 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 00:14:44,661 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 00:14:46,238 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 00:14:46,238 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 00:14:46,238 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282986709]
[2023-04-01 00:14:46,238 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282986709] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 00:14:46,238 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 00:14:46,239 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24
[2023-04-01 00:14:46,239 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765770824]
[2023-04-01 00:14:46,239 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 00:14:46,239 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 24 states
[2023-04-01 00:14:46,239 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 00:14:46,240 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants.
[2023-04-01 00:14:46,240 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552
[2023-04-01 00:14:46,240 INFO  L87              Difference]: Start difference. First operand 72 states and 76 transitions. Second operand  has 24 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 13 states have internal predecessors, (22), 9 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9)
[2023-04-01 00:14:47,163 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 00:14:47,163 INFO  L93              Difference]: Finished difference Result 137 states and 146 transitions.
[2023-04-01 00:14:47,164 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. 
[2023-04-01 00:14:47,164 INFO  L78                 Accepts]: Start accepts. Automaton has  has 24 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 13 states have internal predecessors, (22), 9 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) Word has length 42
[2023-04-01 00:14:47,164 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 00:14:47,165 INFO  L225             Difference]: With dead ends: 137
[2023-04-01 00:14:47,165 INFO  L226             Difference]: Without dead ends: 101
[2023-04-01 00:14:47,166 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=409, Invalid=1313, Unknown=0, NotChecked=0, Total=1722
[2023-04-01 00:14:47,167 INFO  L413           NwaCegarLoop]: 24 mSDtfsCounter, 331 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time
[2023-04-01 00:14:47,167 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [334 Valid, 148 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time]
[2023-04-01 00:14:47,168 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 101 states.
[2023-04-01 00:14:47,182 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 72.
[2023-04-01 00:14:47,182 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 72 states, 38 states have (on average 1.105263157894737) internal successors, (42), 39 states have internal predecessors, (42), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16)
[2023-04-01 00:14:47,183 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 75 transitions.
[2023-04-01 00:14:47,183 INFO  L78                 Accepts]: Start accepts. Automaton has 72 states and 75 transitions. Word has length 42
[2023-04-01 00:14:47,183 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 00:14:47,183 INFO  L495      AbstractCegarLoop]: Abstraction has 72 states and 75 transitions.
[2023-04-01 00:14:47,184 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 24 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 13 states have internal predecessors, (22), 9 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9)
[2023-04-01 00:14:47,184 INFO  L276                IsEmpty]: Start isEmpty. Operand 72 states and 75 transitions.
[2023-04-01 00:14:47,184 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 44
[2023-04-01 00:14:47,184 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 00:14:47,184 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-01 00:14:47,185 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2023-04-01 00:14:47,185 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 00:14:47,185 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 00:14:47,185 INFO  L85        PathProgramCache]: Analyzing trace with hash 202991645, now seen corresponding path program 1 times
[2023-04-01 00:14:47,185 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 00:14:47,185 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778503076]
[2023-04-01 00:14:47,185 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 00:14:47,185 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 00:14:47,203 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 00:14:47,867 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 00:14:47,867 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 00:14:47,868 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778503076]
[2023-04-01 00:14:47,868 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778503076] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 00:14:47,868 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 00:14:47,868 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13
[2023-04-01 00:14:47,868 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581187406]
[2023-04-01 00:14:47,868 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 00:14:47,868 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 13 states
[2023-04-01 00:14:47,868 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 00:14:47,869 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants.
[2023-04-01 00:14:47,869 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156
[2023-04-01 00:14:47,869 INFO  L87              Difference]: Start difference. First operand 72 states and 75 transitions. Second operand  has 13 states, 8 states have (on average 2.875) internal successors, (23), 10 states have internal predecessors, (23), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9)
[2023-04-01 00:14:48,097 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 00:14:48,097 INFO  L93              Difference]: Finished difference Result 112 states and 125 transitions.
[2023-04-01 00:14:48,097 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. 
[2023-04-01 00:14:48,097 INFO  L78                 Accepts]: Start accepts. Automaton has  has 13 states, 8 states have (on average 2.875) internal successors, (23), 10 states have internal predecessors, (23), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 43
[2023-04-01 00:14:48,099 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 00:14:48,100 INFO  L225             Difference]: With dead ends: 112
[2023-04-01 00:14:48,100 INFO  L226             Difference]: Without dead ends: 110
[2023-04-01 00:14:48,100 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462
[2023-04-01 00:14:48,107 INFO  L413           NwaCegarLoop]: 52 mSDtfsCounter, 39 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 568 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-04-01 00:14:48,107 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 568 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-04-01 00:14:48,108 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 110 states.
[2023-04-01 00:14:48,134 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 81.
[2023-04-01 00:14:48,134 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 81 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 46 states have internal predecessors, (48), 18 states have call successors, (18), 18 states have call predecessors, (18), 18 states have return successors, (18), 16 states have call predecessors, (18), 17 states have call successors, (18)
[2023-04-01 00:14:48,136 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 84 transitions.
[2023-04-01 00:14:48,136 INFO  L78                 Accepts]: Start accepts. Automaton has 81 states and 84 transitions. Word has length 43
[2023-04-01 00:14:48,137 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 00:14:48,137 INFO  L495      AbstractCegarLoop]: Abstraction has 81 states and 84 transitions.
[2023-04-01 00:14:48,137 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 13 states, 8 states have (on average 2.875) internal successors, (23), 10 states have internal predecessors, (23), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9)
[2023-04-01 00:14:48,137 INFO  L276                IsEmpty]: Start isEmpty. Operand 81 states and 84 transitions.
[2023-04-01 00:14:48,142 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 73
[2023-04-01 00:14:48,142 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 00:14:48,143 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-01 00:14:48,143 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2023-04-01 00:14:48,143 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 00:14:48,143 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 00:14:48,143 INFO  L85        PathProgramCache]: Analyzing trace with hash -1814055407, now seen corresponding path program 1 times
[2023-04-01 00:14:48,144 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 00:14:48,144 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129840603]
[2023-04-01 00:14:48,144 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 00:14:48,144 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 00:14:48,291 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 00:14:56,169 INFO  L134       CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2023-04-01 00:14:56,169 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 00:14:56,169 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129840603]
[2023-04-01 00:14:56,169 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129840603] provided 0 perfect and 1 imperfect interpolant sequences
[2023-04-01 00:14:56,169 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521168197]
[2023-04-01 00:14:56,170 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 00:14:56,170 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-04-01 00:14:56,170 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-04-01 00:14:56,172 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 00:14:56,175 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 00:14:56,414 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 00:14:56,435 INFO  L262         TraceCheckSpWp]: Trace formula consists of 790 conjuncts, 182 conjunts are in the unsatisfiable core
[2023-04-01 00:14:56,445 INFO  L285         TraceCheckSpWp]: Computing forward predicates...