/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.6.1.ufo.UNBOUNDED.pals.c


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


This is Ultimate 0.2.3-dev-f954360
[2023-04-01 06:19:01,829 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2023-04-01 06:19:01,831 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
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[2023-04-01 06:19:01,871 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2023-04-01 06:19:01,874 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2023-04-01 06:19:01,875 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2023-04-01 06:19:01,876 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2023-04-01 06:19:01,877 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2023-04-01 06:19:01,878 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2023-04-01 06:19:01,878 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2023-04-01 06:19:01,879 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2023-04-01 06:19:01,880 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2023-04-01 06:19:01,880 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2023-04-01 06:19:01,881 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2023-04-01 06:19:01,882 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2023-04-01 06:19:01,882 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2023-04-01 06:19:01,884 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2023-04-01 06:19:01,885 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2023-04-01 06:19:01,886 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2023-04-01 06:19:01,890 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2023-04-01 06:19:01,891 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2023-04-01 06:19:01,892 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2023-04-01 06:19:01,895 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
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[2023-04-01 06:19:01,895 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2023-04-01 06:19:01,896 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
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[2023-04-01 06:19:01,897 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2023-04-01 06:19:01,897 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2023-04-01 06:19:01,898 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2023-04-01 06:19:01,899 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2023-04-01 06:19:01,899 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2023-04-01 06:19:01,900 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
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[2023-04-01 06:19:01,901 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
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[2023-04-01 06:19:01,901 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2023-04-01 06:19:01,902 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2023-04-01 06:19:01,909 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf
[2023-04-01 06:19:01,932 INFO  L113        SettingsManager]: Loading preferences was successful
[2023-04-01 06:19:01,933 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2023-04-01 06:19:01,933 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-04-01 06:19:01,933 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-04-01 06:19:01,934 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-04-01 06:19:01,934 INFO  L138        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-04-01 06:19:01,934 INFO  L138        SettingsManager]:  * User list type=DISABLED
[2023-04-01 06:19:01,934 INFO  L136        SettingsManager]: Preferences of Abstract Interpretation differ from their defaults:
[2023-04-01 06:19:01,934 INFO  L138        SettingsManager]:  * Explicit value domain=true
[2023-04-01 06:19:01,934 INFO  L138        SettingsManager]:  * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain
[2023-04-01 06:19:01,934 INFO  L138        SettingsManager]:  * Octagon Domain=false
[2023-04-01 06:19:01,935 INFO  L138        SettingsManager]:  * Abstract domain=CompoundDomain
[2023-04-01 06:19:01,935 INFO  L138        SettingsManager]:  * Check feasibility of abstract posts with an SMT solver=true
[2023-04-01 06:19:01,935 INFO  L138        SettingsManager]:  * Use the RCFG-of-the-future interface=true
[2023-04-01 06:19:01,935 INFO  L138        SettingsManager]:  * Interval Domain=false
[2023-04-01 06:19:01,935 INFO  L136        SettingsManager]: Preferences of Sifa differ from their defaults:
[2023-04-01 06:19:01,935 INFO  L138        SettingsManager]:  * Call Summarizer=TopInputCallSummarizer
[2023-04-01 06:19:01,935 INFO  L138        SettingsManager]:  * Simplification Technique=POLY_PAC
[2023-04-01 06:19:01,936 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-04-01 06:19:01,936 INFO  L138        SettingsManager]:  * sizeof long=4
[2023-04-01 06:19:01,936 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-04-01 06:19:01,936 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2023-04-01 06:19:01,936 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2023-04-01 06:19:01,936 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-04-01 06:19:01,937 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-04-01 06:19:01,937 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-04-01 06:19:01,937 INFO  L138        SettingsManager]:  * sizeof long double=12
[2023-04-01 06:19:01,937 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2023-04-01 06:19:01,937 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2023-04-01 06:19:01,937 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-04-01 06:19:01,937 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-04-01 06:19:01,937 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-04-01 06:19:01,938 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-04-01 06:19:01,938 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-04-01 06:19:01,938 INFO  L138        SettingsManager]:  * Abstract interpretation Mode=USE_PREDICATES
[2023-04-01 06:19:01,938 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-04-01 06:19:01,938 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2023-04-01 06:19:01,938 INFO  L138        SettingsManager]:  * Trace refinement strategy=SIFA_TAIPAN
[2023-04-01 06:19:01,938 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-04-01 06:19:01,938 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-04-01 06:19:01,939 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2023-04-01 06:19:01,939 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int)
WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain
[2023-04-01 06:19:02,165 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-04-01 06:19:02,187 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-04-01 06:19:02,190 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-04-01 06:19:02,191 INFO  L271        PluginConnector]: Initializing CDTParser...
[2023-04-01 06:19:02,192 INFO  L275        PluginConnector]: CDTParser initialized
[2023-04-01 06:19:02,193 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr.6.1.ufo.UNBOUNDED.pals.c
[2023-04-01 06:19:03,346 INFO  L500              CDTParser]: Created temporary CDT project at NULL
[2023-04-01 06:19:03,534 INFO  L351              CDTParser]: Found 1 translation units.
[2023-04-01 06:19:03,534 INFO  L172              CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.6.1.ufo.UNBOUNDED.pals.c
[2023-04-01 06:19:03,544 INFO  L394              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d96da7c2/60a108d667ef4cdeb4b209b2ab419915/FLAGc1e626ab5
[2023-04-01 06:19:03,563 INFO  L402              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d96da7c2/60a108d667ef4cdeb4b209b2ab419915
[2023-04-01 06:19:03,566 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-04-01 06:19:03,567 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2023-04-01 06:19:03,568 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-04-01 06:19:03,568 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-04-01 06:19:03,575 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-04-01 06:19:03,576 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:19:03" (1/1) ...
[2023-04-01 06:19:03,577 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74d35a52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:19:03, skipping insertion in model container
[2023-04-01 06:19:03,577 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:19:03" (1/1) ...
[2023-04-01 06:19:03,585 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2023-04-01 06:19:03,619 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2023-04-01 06:19:03,803 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.6.1.ufo.UNBOUNDED.pals.c[15140,15153]
[2023-04-01 06:19:03,807 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-04-01 06:19:03,817 INFO  L203         MainTranslator]: Completed pre-run
[2023-04-01 06:19:03,862 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.6.1.ufo.UNBOUNDED.pals.c[15140,15153]
[2023-04-01 06:19:03,862 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-04-01 06:19:03,877 INFO  L208         MainTranslator]: Completed translation
[2023-04-01 06:19:03,877 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:19:03 WrapperNode
[2023-04-01 06:19:03,877 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-04-01 06:19:03,878 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-04-01 06:19:03,878 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2023-04-01 06:19:03,879 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2023-04-01 06:19:03,892 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:19:03" (1/1) ...
[2023-04-01 06:19:03,892 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:19:03" (1/1) ...
[2023-04-01 06:19:03,902 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:19:03" (1/1) ...
[2023-04-01 06:19:03,902 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:19:03" (1/1) ...
[2023-04-01 06:19:03,926 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:19:03" (1/1) ...
[2023-04-01 06:19:03,933 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:19:03" (1/1) ...
[2023-04-01 06:19:03,936 INFO  L185        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:19:03" (1/1) ...
[2023-04-01 06:19:03,937 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:19:03" (1/1) ...
[2023-04-01 06:19:03,941 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-04-01 06:19:03,942 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-04-01 06:19:03,942 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2023-04-01 06:19:03,942 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2023-04-01 06:19:03,943 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:19:03" (1/1) ...
[2023-04-01 06:19:03,948 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-04-01 06:19:03,967 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-04-01 06:19:03,979 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2023-04-01 06:19:03,994 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2023-04-01 06:19:04,022 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2023-04-01 06:19:04,022 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-04-01 06:19:04,022 INFO  L138     BoogieDeclarations]: Found implementation of procedure reach_error
[2023-04-01 06:19:04,022 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2023-04-01 06:19:04,022 INFO  L138     BoogieDeclarations]: Found implementation of procedure node1
[2023-04-01 06:19:04,022 INFO  L138     BoogieDeclarations]: Found implementation of procedure node2
[2023-04-01 06:19:04,023 INFO  L138     BoogieDeclarations]: Found implementation of procedure node3
[2023-04-01 06:19:04,023 INFO  L138     BoogieDeclarations]: Found implementation of procedure node4
[2023-04-01 06:19:04,023 INFO  L138     BoogieDeclarations]: Found implementation of procedure node5
[2023-04-01 06:19:04,023 INFO  L138     BoogieDeclarations]: Found implementation of procedure node6
[2023-04-01 06:19:04,023 INFO  L138     BoogieDeclarations]: Found implementation of procedure init
[2023-04-01 06:19:04,023 INFO  L138     BoogieDeclarations]: Found implementation of procedure check
[2023-04-01 06:19:04,023 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2023-04-01 06:19:04,023 INFO  L138     BoogieDeclarations]: Found implementation of procedure assert
[2023-04-01 06:19:04,024 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2023-04-01 06:19:04,024 INFO  L130     BoogieDeclarations]: Found specification of procedure __assert_fail
[2023-04-01 06:19:04,024 INFO  L130     BoogieDeclarations]: Found specification of procedure reach_error
[2023-04-01 06:19:04,024 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-04-01 06:19:04,024 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool
[2023-04-01 06:19:04,024 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char
[2023-04-01 06:19:04,024 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar
[2023-04-01 06:19:04,024 INFO  L130     BoogieDeclarations]: Found specification of procedure assert
[2023-04-01 06:19:04,024 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2023-04-01 06:19:04,025 INFO  L130     BoogieDeclarations]: Found specification of procedure read
[2023-04-01 06:19:04,025 INFO  L130     BoogieDeclarations]: Found specification of procedure write
[2023-04-01 06:19:04,025 INFO  L130     BoogieDeclarations]: Found specification of procedure node1
[2023-04-01 06:19:04,025 INFO  L130     BoogieDeclarations]: Found specification of procedure node2
[2023-04-01 06:19:04,025 INFO  L130     BoogieDeclarations]: Found specification of procedure node3
[2023-04-01 06:19:04,025 INFO  L130     BoogieDeclarations]: Found specification of procedure node4
[2023-04-01 06:19:04,025 INFO  L130     BoogieDeclarations]: Found specification of procedure node5
[2023-04-01 06:19:04,025 INFO  L130     BoogieDeclarations]: Found specification of procedure node6
[2023-04-01 06:19:04,025 INFO  L130     BoogieDeclarations]: Found specification of procedure init
[2023-04-01 06:19:04,025 INFO  L130     BoogieDeclarations]: Found specification of procedure check
[2023-04-01 06:19:04,026 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2023-04-01 06:19:04,026 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2023-04-01 06:19:04,026 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2023-04-01 06:19:04,026 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-04-01 06:19:04,026 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2023-04-01 06:19:04,026 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2023-04-01 06:19:04,026 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2023-04-01 06:19:04,157 INFO  L236             CfgBuilder]: Building ICFG
[2023-04-01 06:19:04,173 INFO  L262             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-04-01 06:19:04,670 INFO  L277             CfgBuilder]: Performing block encoding
[2023-04-01 06:19:05,163 INFO  L297             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-04-01 06:19:05,164 INFO  L302             CfgBuilder]: Removed 1 assume(true) statements.
[2023-04-01 06:19:05,168 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:19:05 BoogieIcfgContainer
[2023-04-01 06:19:05,168 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-04-01 06:19:05,172 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-04-01 06:19:05,172 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2023-04-01 06:19:05,175 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2023-04-01 06:19:05,175 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 06:19:03" (1/3) ...
[2023-04-01 06:19:05,176 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d07fb6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:19:05, skipping insertion in model container
[2023-04-01 06:19:05,176 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:19:03" (2/3) ...
[2023-04-01 06:19:05,176 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d07fb6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:19:05, skipping insertion in model container
[2023-04-01 06:19:05,177 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:19:05" (3/3) ...
[2023-04-01 06:19:05,179 INFO  L112   eAbstractionObserver]: Analyzing ICFG pals_lcr.6.1.ufo.UNBOUNDED.pals.c
[2023-04-01 06:19:05,195 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-04-01 06:19:05,195 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-04-01 06:19:05,244 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-04-01 06:19:05,251 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;@51e5bd88, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2023-04-01 06:19:05,251 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-04-01 06:19:05,255 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 52 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 28 states have internal predecessors, (32), 12 states have call successors, (12), 12 states have call predecessors, (12), 12 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12)
[2023-04-01 06:19:05,262 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 44
[2023-04-01 06:19:05,262 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 06:19:05,263 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 06:19:05,264 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 06:19:05,269 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 06:19:05,270 INFO  L85        PathProgramCache]: Analyzing trace with hash -1128528231, now seen corresponding path program 1 times
[2023-04-01 06:19:05,277 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 06:19:05,277 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252993799]
[2023-04-01 06:19:05,278 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 06:19:05,278 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 06:19:05,648 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 06:19:09,957 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-01 06:19:09,958 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 06:19:09,958 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252993799]
[2023-04-01 06:19:09,959 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252993799] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 06:19:09,959 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 06:19:09,959 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28
[2023-04-01 06:19:09,960 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115387869]
[2023-04-01 06:19:09,961 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 06:19:09,965 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 28 states
[2023-04-01 06:19:09,965 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 06:19:10,005 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants.
[2023-04-01 06:19:10,008 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756
[2023-04-01 06:19:10,010 INFO  L87              Difference]: Start difference. First operand  has 52 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 28 states have internal predecessors, (32), 12 states have call successors, (12), 12 states have call predecessors, (12), 12 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand  has 28 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 11 states have call successors, (12), 9 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10)
[2023-04-01 06:19:11,658 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 06:19:11,658 INFO  L93              Difference]: Finished difference Result 124 states and 142 transitions.
[2023-04-01 06:19:11,660 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. 
[2023-04-01 06:19:11,661 INFO  L78                 Accepts]: Start accepts. Automaton has  has 28 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 11 states have call successors, (12), 9 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 43
[2023-04-01 06:19:11,661 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 06:19:11,668 INFO  L225             Difference]: With dead ends: 124
[2023-04-01 06:19:11,669 INFO  L226             Difference]: Without dead ends: 85
[2023-04-01 06:19:11,672 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=531, Invalid=2225, Unknown=0, NotChecked=0, Total=2756
[2023-04-01 06:19:11,675 INFO  L413           NwaCegarLoop]: 22 mSDtfsCounter, 357 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 743 mSolverCounterSat, 255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 255 IncrementalHoareTripleChecker+Valid, 743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time
[2023-04-01 06:19:11,677 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [365 Valid, 128 Invalid, 998 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [255 Valid, 743 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time]
[2023-04-01 06:19:11,692 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 85 states.
[2023-04-01 06:19:11,735 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 74.
[2023-04-01 06:19:11,736 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 74 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 37 states have internal predecessors, (40), 19 states have call successors, (19), 19 states have call predecessors, (19), 18 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19)
[2023-04-01 06:19:11,741 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions.
[2023-04-01 06:19:11,743 INFO  L78                 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 43
[2023-04-01 06:19:11,743 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 06:19:11,744 INFO  L495      AbstractCegarLoop]: Abstraction has 74 states and 78 transitions.
[2023-04-01 06:19:11,745 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 28 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 11 states have call successors, (12), 9 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10)
[2023-04-01 06:19:11,745 INFO  L276                IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions.
[2023-04-01 06:19:11,746 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 46
[2023-04-01 06:19:11,747 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 06:19:11,747 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, 1, 1]
[2023-04-01 06:19:11,747 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-04-01 06:19:11,747 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 06:19:11,748 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 06:19:11,748 INFO  L85        PathProgramCache]: Analyzing trace with hash -699170245, now seen corresponding path program 1 times
[2023-04-01 06:19:11,748 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 06:19:11,749 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927164693]
[2023-04-01 06:19:11,749 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 06:19:11,749 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 06:19:11,878 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 06:19:12,604 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-01 06:19:12,604 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 06:19:12,605 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927164693]
[2023-04-01 06:19:12,605 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927164693] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 06:19:12,605 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 06:19:12,607 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11
[2023-04-01 06:19:12,608 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478959662]
[2023-04-01 06:19:12,612 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 06:19:12,614 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 11 states
[2023-04-01 06:19:12,614 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 06:19:12,615 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2023-04-01 06:19:12,615 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110
[2023-04-01 06:19:12,615 INFO  L87              Difference]: Start difference. First operand 74 states and 78 transitions. Second operand  has 11 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10)
[2023-04-01 06:19:13,165 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 06:19:13,166 INFO  L93              Difference]: Finished difference Result 165 states and 179 transitions.
[2023-04-01 06:19:13,166 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. 
[2023-04-01 06:19:13,166 INFO  L78                 Accepts]: Start accepts. Automaton has  has 11 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 45
[2023-04-01 06:19:13,167 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 06:19:13,168 INFO  L225             Difference]: With dead ends: 165
[2023-04-01 06:19:13,168 INFO  L226             Difference]: Without dead ends: 127
[2023-04-01 06:19:13,169 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306
[2023-04-01 06:19:13,170 INFO  L413           NwaCegarLoop]: 31 mSDtfsCounter, 93 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time
[2023-04-01 06:19:13,171 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 119 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time]
[2023-04-01 06:19:13,172 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 127 states.
[2023-04-01 06:19:13,199 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 112.
[2023-04-01 06:19:13,199 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 112 states, 57 states have (on average 1.1228070175438596) internal successors, (64), 59 states have internal predecessors, (64), 27 states have call successors, (27), 27 states have call predecessors, (27), 27 states have return successors, (28), 25 states have call predecessors, (28), 26 states have call successors, (28)
[2023-04-01 06:19:13,200 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 119 transitions.
[2023-04-01 06:19:13,200 INFO  L78                 Accepts]: Start accepts. Automaton has 112 states and 119 transitions. Word has length 45
[2023-04-01 06:19:13,201 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 06:19:13,201 INFO  L495      AbstractCegarLoop]: Abstraction has 112 states and 119 transitions.
[2023-04-01 06:19:13,201 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 11 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10)
[2023-04-01 06:19:13,201 INFO  L276                IsEmpty]: Start isEmpty. Operand 112 states and 119 transitions.
[2023-04-01 06:19:13,202 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 46
[2023-04-01 06:19:13,202 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 06:19:13,202 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, 1, 1]
[2023-04-01 06:19:13,203 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-04-01 06:19:13,203 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 06:19:13,203 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 06:19:13,203 INFO  L85        PathProgramCache]: Analyzing trace with hash 2116734401, now seen corresponding path program 1 times
[2023-04-01 06:19:13,203 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 06:19:13,203 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127239713]
[2023-04-01 06:19:13,204 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 06:19:13,204 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 06:19:13,278 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 06:19:16,135 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-01 06:19:16,135 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 06:19:16,135 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127239713]
[2023-04-01 06:19:16,135 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127239713] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 06:19:16,135 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 06:19:16,136 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27
[2023-04-01 06:19:16,136 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126154146]
[2023-04-01 06:19:16,136 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 06:19:16,136 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 27 states
[2023-04-01 06:19:16,136 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 06:19:16,137 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants.
[2023-04-01 06:19:16,137 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702
[2023-04-01 06:19:16,138 INFO  L87              Difference]: Start difference. First operand 112 states and 119 transitions. Second operand  has 27 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 10 states have call successors, (12), 8 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10)
[2023-04-01 06:19:17,502 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 06:19:17,503 INFO  L93              Difference]: Finished difference Result 209 states and 224 transitions.
[2023-04-01 06:19:17,503 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. 
[2023-04-01 06:19:17,503 INFO  L78                 Accepts]: Start accepts. Automaton has  has 27 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 10 states have call successors, (12), 8 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) Word has length 45
[2023-04-01 06:19:17,504 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 06:19:17,508 INFO  L225             Difference]: With dead ends: 209
[2023-04-01 06:19:17,508 INFO  L226             Difference]: Without dead ends: 136
[2023-04-01 06:19:17,513 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=459, Invalid=1521, Unknown=0, NotChecked=0, Total=1980
[2023-04-01 06:19:17,515 INFO  L413           NwaCegarLoop]: 24 mSDtfsCounter, 434 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time
[2023-04-01 06:19:17,517 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [437 Valid, 153 Invalid, 852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 607 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time]
[2023-04-01 06:19:17,519 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 136 states.
[2023-04-01 06:19:17,574 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 112.
[2023-04-01 06:19:17,576 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 112 states, 57 states have (on average 1.105263157894737) internal successors, (63), 59 states have internal predecessors, (63), 27 states have call successors, (27), 27 states have call predecessors, (27), 27 states have return successors, (28), 25 states have call predecessors, (28), 26 states have call successors, (28)
[2023-04-01 06:19:17,578 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 118 transitions.
[2023-04-01 06:19:17,580 INFO  L78                 Accepts]: Start accepts. Automaton has 112 states and 118 transitions. Word has length 45
[2023-04-01 06:19:17,580 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 06:19:17,581 INFO  L495      AbstractCegarLoop]: Abstraction has 112 states and 118 transitions.
[2023-04-01 06:19:17,581 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 27 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 10 states have call successors, (12), 8 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10)
[2023-04-01 06:19:17,581 INFO  L276                IsEmpty]: Start isEmpty. Operand 112 states and 118 transitions.
[2023-04-01 06:19:17,583 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 47
[2023-04-01 06:19:17,584 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 06:19:17,584 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, 1, 1, 1]
[2023-04-01 06:19:17,584 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2023-04-01 06:19:17,584 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 06:19:17,585 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 06:19:17,585 INFO  L85        PathProgramCache]: Analyzing trace with hash -2117937551, now seen corresponding path program 1 times
[2023-04-01 06:19:17,585 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 06:19:17,585 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120220814]
[2023-04-01 06:19:17,585 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 06:19:17,586 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 06:19:17,626 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 06:19:18,846 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-01 06:19:18,846 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 06:19:18,847 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120220814]
[2023-04-01 06:19:18,847 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120220814] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 06:19:18,848 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 06:19:18,848 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13
[2023-04-01 06:19:18,848 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713445418]
[2023-04-01 06:19:18,848 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 06:19:18,849 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 13 states
[2023-04-01 06:19:18,849 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 06:19:18,850 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants.
[2023-04-01 06:19:18,850 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156
[2023-04-01 06:19:18,850 INFO  L87              Difference]: Start difference. First operand 112 states and 118 transitions. Second operand  has 13 states, 8 states have (on average 3.0) internal successors, (24), 10 states have internal predecessors, (24), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10)
[2023-04-01 06:19:19,186 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 06:19:19,186 INFO  L93              Difference]: Finished difference Result 148 states and 165 transitions.
[2023-04-01 06:19:19,186 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. 
[2023-04-01 06:19:19,187 INFO  L78                 Accepts]: Start accepts. Automaton has  has 13 states, 8 states have (on average 3.0) internal successors, (24), 10 states have internal predecessors, (24), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 46
[2023-04-01 06:19:19,189 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 06:19:19,192 INFO  L225             Difference]: With dead ends: 148
[2023-04-01 06:19:19,192 INFO  L226             Difference]: Without dead ends: 146
[2023-04-01 06:19:19,193 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462
[2023-04-01 06:19:19,199 INFO  L413           NwaCegarLoop]: 57 mSDtfsCounter, 35 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2023-04-01 06:19:19,199 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 607 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2023-04-01 06:19:19,200 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 146 states.
[2023-04-01 06:19:19,237 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 120.
[2023-04-01 06:19:19,237 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 120 states, 62 states have (on average 1.096774193548387) internal successors, (68), 65 states have internal predecessors, (68), 28 states have call successors, (28), 28 states have call predecessors, (28), 29 states have return successors, (30), 26 states have call predecessors, (30), 27 states have call successors, (30)
[2023-04-01 06:19:19,239 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 126 transitions.
[2023-04-01 06:19:19,239 INFO  L78                 Accepts]: Start accepts. Automaton has 120 states and 126 transitions. Word has length 46
[2023-04-01 06:19:19,240 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 06:19:19,240 INFO  L495      AbstractCegarLoop]: Abstraction has 120 states and 126 transitions.
[2023-04-01 06:19:19,240 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 13 states, 8 states have (on average 3.0) internal successors, (24), 10 states have internal predecessors, (24), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10)
[2023-04-01 06:19:19,240 INFO  L276                IsEmpty]: Start isEmpty. Operand 120 states and 126 transitions.
[2023-04-01 06:19:19,249 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 78
[2023-04-01 06:19:19,250 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 06:19:19,250 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, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-01 06:19:19,250 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2023-04-01 06:19:19,250 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 06:19:19,251 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 06:19:19,251 INFO  L85        PathProgramCache]: Analyzing trace with hash -860714124, now seen corresponding path program 1 times
[2023-04-01 06:19:19,251 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 06:19:19,251 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054440406]
[2023-04-01 06:19:19,251 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 06:19:19,251 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 06:19:19,538 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 06:19:34,046 INFO  L134       CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2023-04-01 06:19:34,047 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 06:19:34,047 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054440406]
[2023-04-01 06:19:34,047 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054440406] provided 0 perfect and 1 imperfect interpolant sequences
[2023-04-01 06:19:34,047 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409261794]
[2023-04-01 06:19:34,047 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 06:19:34,048 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-04-01 06:19:34,048 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-04-01 06:19:34,057 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-04-01 06:19:34,065 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2023-04-01 06:19:34,345 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 06:19:34,358 INFO  L262         TraceCheckSpWp]: Trace formula consists of 916 conjuncts, 232 conjunts are in the unsatisfiable core
[2023-04-01 06:19:34,375 INFO  L285         TraceCheckSpWp]: Computing forward predicates...