/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/seq-mthreaded/pals_lcr.3.1.ufo.BOUNDED-6.pals.c


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


This is Ultimate 0.2.3-dev-f954360
[2023-04-01 06:17:46,062 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2023-04-01 06:17:46,063 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
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[2023-04-01 06:17:46,081 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2023-04-01 06:17:46,082 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2023-04-01 06:17:46,083 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2023-04-01 06:17:46,084 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2023-04-01 06:17:46,085 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2023-04-01 06:17:46,085 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2023-04-01 06:17:46,086 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2023-04-01 06:17:46,087 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2023-04-01 06:17:46,087 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2023-04-01 06:17:46,101 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2023-04-01 06:17:46,102 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2023-04-01 06:17:46,102 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2023-04-01 06:17:46,103 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2023-04-01 06:17:46,103 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2023-04-01 06:17:46,104 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2023-04-01 06:17:46,106 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2023-04-01 06:17:46,106 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2023-04-01 06:17:46,107 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2023-04-01 06:17:46,108 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2023-04-01 06:17:46,108 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2023-04-01 06:17:46,111 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
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[2023-04-01 06:17:46,111 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
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[2023-04-01 06:17:46,112 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2023-04-01 06:17:46,120 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
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[2023-04-01 06:17:46,121 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2023-04-01 06:17:46,122 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2023-04-01 06:17:46,122 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2023-04-01 06:17:46,122 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
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[2023-04-01 06:17:46,123 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2023-04-01 06:17:46,124 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2023-04-01 06:17:46,126 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 06:17:46,140 INFO  L113        SettingsManager]: Loading preferences was successful
[2023-04-01 06:17:46,140 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2023-04-01 06:17:46,140 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-04-01 06:17:46,140 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-04-01 06:17:46,144 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-04-01 06:17:46,144 INFO  L138        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-04-01 06:17:46,144 INFO  L138        SettingsManager]:  * User list type=DISABLED
[2023-04-01 06:17:46,145 INFO  L136        SettingsManager]: Preferences of Abstract Interpretation differ from their defaults:
[2023-04-01 06:17:46,145 INFO  L138        SettingsManager]:  * Explicit value domain=true
[2023-04-01 06:17:46,145 INFO  L138        SettingsManager]:  * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain
[2023-04-01 06:17:46,145 INFO  L138        SettingsManager]:  * Octagon Domain=false
[2023-04-01 06:17:46,145 INFO  L138        SettingsManager]:  * Abstract domain=CompoundDomain
[2023-04-01 06:17:46,146 INFO  L138        SettingsManager]:  * Check feasibility of abstract posts with an SMT solver=true
[2023-04-01 06:17:46,146 INFO  L138        SettingsManager]:  * Use the RCFG-of-the-future interface=true
[2023-04-01 06:17:46,146 INFO  L138        SettingsManager]:  * Interval Domain=false
[2023-04-01 06:17:46,146 INFO  L136        SettingsManager]: Preferences of Sifa differ from their defaults:
[2023-04-01 06:17:46,146 INFO  L138        SettingsManager]:  * Call Summarizer=TopInputCallSummarizer
[2023-04-01 06:17:46,146 INFO  L138        SettingsManager]:  * Simplification Technique=POLY_PAC
[2023-04-01 06:17:46,146 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-04-01 06:17:46,147 INFO  L138        SettingsManager]:  * sizeof long=4
[2023-04-01 06:17:46,147 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-04-01 06:17:46,147 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2023-04-01 06:17:46,147 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2023-04-01 06:17:46,147 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-04-01 06:17:46,147 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-04-01 06:17:46,147 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-04-01 06:17:46,147 INFO  L138        SettingsManager]:  * sizeof long double=12
[2023-04-01 06:17:46,148 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2023-04-01 06:17:46,148 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2023-04-01 06:17:46,148 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-04-01 06:17:46,148 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-04-01 06:17:46,148 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-04-01 06:17:46,148 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-04-01 06:17:46,148 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-04-01 06:17:46,148 INFO  L138        SettingsManager]:  * Abstract interpretation Mode=USE_PREDICATES
[2023-04-01 06:17:46,148 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-04-01 06:17:46,149 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2023-04-01 06:17:46,149 INFO  L138        SettingsManager]:  * Trace refinement strategy=SIFA_TAIPAN
[2023-04-01 06:17:46,149 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-04-01 06:17:46,149 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-04-01 06:17:46,149 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2023-04-01 06:17:46,149 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain
[2023-04-01 06:17:46,334 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-04-01 06:17:46,349 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-04-01 06:17:46,351 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-04-01 06:17:46,352 INFO  L271        PluginConnector]: Initializing CDTParser...
[2023-04-01 06:17:46,352 INFO  L275        PluginConnector]: CDTParser initialized
[2023-04-01 06:17:46,353 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr.3.1.ufo.BOUNDED-6.pals.c
[2023-04-01 06:17:47,403 INFO  L500              CDTParser]: Created temporary CDT project at NULL
[2023-04-01 06:17:47,557 INFO  L351              CDTParser]: Found 1 translation units.
[2023-04-01 06:17:47,558 INFO  L172              CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.3.1.ufo.BOUNDED-6.pals.c
[2023-04-01 06:17:47,565 INFO  L394              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/970c3fd41/f9ef2ef700764c8bb554c6b402a1a404/FLAGa4241d6d7
[2023-04-01 06:17:47,576 INFO  L402              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/970c3fd41/f9ef2ef700764c8bb554c6b402a1a404
[2023-04-01 06:17:47,578 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-04-01 06:17:47,579 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2023-04-01 06:17:47,580 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-04-01 06:17:47,580 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-04-01 06:17:47,582 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-04-01 06:17:47,583 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:17:47" (1/1) ...
[2023-04-01 06:17:47,584 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39f1c808 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:17:47, skipping insertion in model container
[2023-04-01 06:17:47,584 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:17:47" (1/1) ...
[2023-04-01 06:17:47,590 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2023-04-01 06:17:47,632 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2023-04-01 06:17:47,763 WARN  L247   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.3.1.ufo.BOUNDED-6.pals.c[5984,5997]
[2023-04-01 06:17:47,766 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-04-01 06:17:47,773 INFO  L203         MainTranslator]: Completed pre-run
[2023-04-01 06:17:47,802 WARN  L247   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.3.1.ufo.BOUNDED-6.pals.c[5984,5997]
[2023-04-01 06:17:47,802 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-04-01 06:17:47,812 INFO  L208         MainTranslator]: Completed translation
[2023-04-01 06:17:47,813 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:17:47 WrapperNode
[2023-04-01 06:17:47,813 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-04-01 06:17:47,814 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-04-01 06:17:47,814 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2023-04-01 06:17:47,814 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2023-04-01 06:17:47,821 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:17:47" (1/1) ...
[2023-04-01 06:17:47,822 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:17:47" (1/1) ...
[2023-04-01 06:17:47,827 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:17:47" (1/1) ...
[2023-04-01 06:17:47,827 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:17:47" (1/1) ...
[2023-04-01 06:17:47,851 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:17:47" (1/1) ...
[2023-04-01 06:17:47,856 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:17:47" (1/1) ...
[2023-04-01 06:17:47,858 INFO  L185        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:17:47" (1/1) ...
[2023-04-01 06:17:47,858 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:17:47" (1/1) ...
[2023-04-01 06:17:47,860 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-04-01 06:17:47,861 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-04-01 06:17:47,861 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2023-04-01 06:17:47,861 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2023-04-01 06:17:47,862 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:17:47" (1/1) ...
[2023-04-01 06:17:47,866 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-04-01 06:17:47,873 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-04-01 06:17:47,890 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 06:17:47,907 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 06:17:47,935 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2023-04-01 06:17:47,936 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-04-01 06:17:47,936 INFO  L138     BoogieDeclarations]: Found implementation of procedure reach_error
[2023-04-01 06:17:47,936 INFO  L138     BoogieDeclarations]: Found implementation of procedure node1
[2023-04-01 06:17:47,936 INFO  L138     BoogieDeclarations]: Found implementation of procedure node2
[2023-04-01 06:17:47,936 INFO  L138     BoogieDeclarations]: Found implementation of procedure node3
[2023-04-01 06:17:47,936 INFO  L138     BoogieDeclarations]: Found implementation of procedure init
[2023-04-01 06:17:47,936 INFO  L138     BoogieDeclarations]: Found implementation of procedure check
[2023-04-01 06:17:47,936 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2023-04-01 06:17:47,936 INFO  L138     BoogieDeclarations]: Found implementation of procedure assert
[2023-04-01 06:17:47,937 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2023-04-01 06:17:47,937 INFO  L130     BoogieDeclarations]: Found specification of procedure __assert_fail
[2023-04-01 06:17:47,937 INFO  L130     BoogieDeclarations]: Found specification of procedure reach_error
[2023-04-01 06:17:47,937 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-04-01 06:17:47,937 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool
[2023-04-01 06:17:47,937 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char
[2023-04-01 06:17:47,937 INFO  L130     BoogieDeclarations]: Found specification of procedure assert
[2023-04-01 06:17:47,937 INFO  L130     BoogieDeclarations]: Found specification of procedure read
[2023-04-01 06:17:47,937 INFO  L130     BoogieDeclarations]: Found specification of procedure write
[2023-04-01 06:17:47,937 INFO  L130     BoogieDeclarations]: Found specification of procedure node1
[2023-04-01 06:17:47,937 INFO  L130     BoogieDeclarations]: Found specification of procedure node2
[2023-04-01 06:17:47,938 INFO  L130     BoogieDeclarations]: Found specification of procedure node3
[2023-04-01 06:17:47,938 INFO  L130     BoogieDeclarations]: Found specification of procedure init
[2023-04-01 06:17:47,938 INFO  L130     BoogieDeclarations]: Found specification of procedure check
[2023-04-01 06:17:47,938 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2023-04-01 06:17:47,938 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2023-04-01 06:17:47,938 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2023-04-01 06:17:47,938 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-04-01 06:17:47,938 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2023-04-01 06:17:47,938 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2023-04-01 06:17:47,938 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2023-04-01 06:17:48,010 INFO  L236             CfgBuilder]: Building ICFG
[2023-04-01 06:17:48,012 INFO  L262             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-04-01 06:17:48,247 INFO  L277             CfgBuilder]: Performing block encoding
[2023-04-01 06:17:48,459 INFO  L297             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-04-01 06:17:48,459 INFO  L302             CfgBuilder]: Removed 1 assume(true) statements.
[2023-04-01 06:17:48,463 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:17:48 BoogieIcfgContainer
[2023-04-01 06:17:48,463 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-04-01 06:17:48,465 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-04-01 06:17:48,465 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2023-04-01 06:17:48,467 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2023-04-01 06:17:48,467 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 06:17:47" (1/3) ...
[2023-04-01 06:17:48,467 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4792c8d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:17:48, skipping insertion in model container
[2023-04-01 06:17:48,468 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:17:47" (2/3) ...
[2023-04-01 06:17:48,468 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4792c8d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:17:48, skipping insertion in model container
[2023-04-01 06:17:48,468 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:17:48" (3/3) ...
[2023-04-01 06:17:48,470 INFO  L112   eAbstractionObserver]: Analyzing ICFG pals_lcr.3.1.ufo.BOUNDED-6.pals.c
[2023-04-01 06:17:48,483 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-04-01 06:17:48,483 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-04-01 06:17:48,529 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-04-01 06:17:48,535 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;@4b12780a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2023-04-01 06:17:48,535 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-04-01 06:17:48,538 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 40 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 23 states have internal predecessors, (28), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8)
[2023-04-01 06:17:48,544 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 31
[2023-04-01 06:17:48,545 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 06:17:48,546 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-01 06:17:48,547 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 06:17:48,552 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 06:17:48,552 INFO  L85        PathProgramCache]: Analyzing trace with hash -1196958781, now seen corresponding path program 1 times
[2023-04-01 06:17:48,560 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 06:17:48,561 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997099874]
[2023-04-01 06:17:48,561 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 06:17:48,562 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 06:17:48,841 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 06:17:50,070 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 06:17:50,070 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 06:17:50,071 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997099874]
[2023-04-01 06:17:50,071 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997099874] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 06:17:50,071 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 06:17:50,071 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15
[2023-04-01 06:17:50,072 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480187037]
[2023-04-01 06:17:50,073 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 06:17:50,076 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 15 states
[2023-04-01 06:17:50,077 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 06:17:50,112 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants.
[2023-04-01 06:17:50,114 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210
[2023-04-01 06:17:50,116 INFO  L87              Difference]: Start difference. First operand  has 40 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 23 states have internal predecessors, (28), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand  has 15 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 6 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6)
[2023-04-01 06:17:50,568 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 06:17:50,568 INFO  L93              Difference]: Finished difference Result 105 states and 120 transitions.
[2023-04-01 06:17:50,569 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. 
[2023-04-01 06:17:50,570 INFO  L78                 Accepts]: Start accepts. Automaton has  has 15 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 6 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 30
[2023-04-01 06:17:50,571 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 06:17:50,576 INFO  L225             Difference]: With dead ends: 105
[2023-04-01 06:17:50,576 INFO  L226             Difference]: Without dead ends: 65
[2023-04-01 06:17:50,578 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=166, Invalid=484, Unknown=0, NotChecked=0, Total=650
[2023-04-01 06:17:50,580 INFO  L413           NwaCegarLoop]: 24 mSDtfsCounter, 180 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2023-04-01 06:17:50,581 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 126 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2023-04-01 06:17:50,593 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 65 states.
[2023-04-01 06:17:50,609 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 53.
[2023-04-01 06:17:50,610 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 53 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12)
[2023-04-01 06:17:50,611 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions.
[2023-04-01 06:17:50,612 INFO  L78                 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 30
[2023-04-01 06:17:50,612 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 06:17:50,612 INFO  L495      AbstractCegarLoop]: Abstraction has 53 states and 57 transitions.
[2023-04-01 06:17:50,613 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 15 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 6 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6)
[2023-04-01 06:17:50,613 INFO  L276                IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions.
[2023-04-01 06:17:50,614 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 33
[2023-04-01 06:17:50,614 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 06:17:50,614 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-01 06:17:50,614 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-04-01 06:17:50,614 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 06:17:50,615 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 06:17:50,615 INFO  L85        PathProgramCache]: Analyzing trace with hash -257552747, now seen corresponding path program 1 times
[2023-04-01 06:17:50,615 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 06:17:50,615 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885132383]
[2023-04-01 06:17:50,615 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 06:17:50,615 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 06:17:50,652 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 06:17:50,915 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 06:17:50,915 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 06:17:50,915 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885132383]
[2023-04-01 06:17:50,916 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885132383] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 06:17:50,916 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 06:17:50,916 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9
[2023-04-01 06:17:50,916 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943207068]
[2023-04-01 06:17:50,916 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 06:17:50,917 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 9 states
[2023-04-01 06:17:50,917 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 06:17:50,918 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2023-04-01 06:17:50,918 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72
[2023-04-01 06:17:50,918 INFO  L87              Difference]: Start difference. First operand 53 states and 57 transitions. Second operand  has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6)
[2023-04-01 06:17:51,109 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 06:17:51,110 INFO  L93              Difference]: Finished difference Result 115 states and 126 transitions.
[2023-04-01 06:17:51,111 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. 
[2023-04-01 06:17:51,115 INFO  L78                 Accepts]: Start accepts. Automaton has  has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 32
[2023-04-01 06:17:51,115 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 06:17:51,118 INFO  L225             Difference]: With dead ends: 115
[2023-04-01 06:17:51,118 INFO  L226             Difference]: Without dead ends: 85
[2023-04-01 06:17:51,122 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182
[2023-04-01 06:17:51,123 INFO  L413           NwaCegarLoop]: 21 mSDtfsCounter, 99 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-04-01 06:17:51,124 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 67 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-04-01 06:17:51,126 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 85 states.
[2023-04-01 06:17:51,140 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 56.
[2023-04-01 06:17:51,140 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 56 states, 32 states have (on average 1.15625) internal successors, (37), 33 states have internal predecessors, (37), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11)
[2023-04-01 06:17:51,141 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions.
[2023-04-01 06:17:51,141 INFO  L78                 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 32
[2023-04-01 06:17:51,141 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 06:17:51,141 INFO  L495      AbstractCegarLoop]: Abstraction has 56 states and 60 transitions.
[2023-04-01 06:17:51,141 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6)
[2023-04-01 06:17:51,142 INFO  L276                IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions.
[2023-04-01 06:17:51,142 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 33
[2023-04-01 06:17:51,142 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 06:17:51,142 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-01 06:17:51,142 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-04-01 06:17:51,142 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 06:17:51,143 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 06:17:51,143 INFO  L85        PathProgramCache]: Analyzing trace with hash 184613803, now seen corresponding path program 1 times
[2023-04-01 06:17:51,143 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 06:17:51,143 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173615502]
[2023-04-01 06:17:51,143 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 06:17:51,143 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 06:17:51,180 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 06:17:51,923 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 06:17:51,924 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 06:17:51,924 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173615502]
[2023-04-01 06:17:51,924 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173615502] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 06:17:51,924 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 06:17:51,924 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16
[2023-04-01 06:17:51,924 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129817273]
[2023-04-01 06:17:51,925 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 06:17:51,925 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 16 states
[2023-04-01 06:17:51,925 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 06:17:51,925 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants.
[2023-04-01 06:17:51,926 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240
[2023-04-01 06:17:51,926 INFO  L87              Difference]: Start difference. First operand 56 states and 60 transitions. Second operand  has 16 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 7 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6)
[2023-04-01 06:17:52,597 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 06:17:52,598 INFO  L93              Difference]: Finished difference Result 120 states and 131 transitions.
[2023-04-01 06:17:52,598 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. 
[2023-04-01 06:17:52,598 INFO  L78                 Accepts]: Start accepts. Automaton has  has 16 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 7 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 32
[2023-04-01 06:17:52,599 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 06:17:52,600 INFO  L225             Difference]: With dead ends: 120
[2023-04-01 06:17:52,600 INFO  L226             Difference]: Without dead ends: 90
[2023-04-01 06:17:52,601 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=235, Invalid=887, Unknown=0, NotChecked=0, Total=1122
[2023-04-01 06:17:52,601 INFO  L413           NwaCegarLoop]: 20 mSDtfsCounter, 277 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2023-04-01 06:17:52,602 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [284 Valid, 87 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2023-04-01 06:17:52,602 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 90 states.
[2023-04-01 06:17:52,613 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 56.
[2023-04-01 06:17:52,613 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 56 states, 32 states have (on average 1.125) internal successors, (36), 33 states have internal predecessors, (36), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11)
[2023-04-01 06:17:52,614 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 59 transitions.
[2023-04-01 06:17:52,614 INFO  L78                 Accepts]: Start accepts. Automaton has 56 states and 59 transitions. Word has length 32
[2023-04-01 06:17:52,614 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 06:17:52,614 INFO  L495      AbstractCegarLoop]: Abstraction has 56 states and 59 transitions.
[2023-04-01 06:17:52,614 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 16 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 7 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6)
[2023-04-01 06:17:52,614 INFO  L276                IsEmpty]: Start isEmpty. Operand 56 states and 59 transitions.
[2023-04-01 06:17:52,615 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 34
[2023-04-01 06:17:52,615 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 06:17:52,615 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-01 06:17:52,615 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2023-04-01 06:17:52,615 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 06:17:52,616 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 06:17:52,616 INFO  L85        PathProgramCache]: Analyzing trace with hash 739449873, now seen corresponding path program 1 times
[2023-04-01 06:17:52,616 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 06:17:52,616 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442927543]
[2023-04-01 06:17:52,616 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 06:17:52,616 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 06:17:52,628 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 06:17:52,766 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 06:17:52,766 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 06:17:52,766 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442927543]
[2023-04-01 06:17:52,766 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442927543] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 06:17:52,766 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 06:17:52,767 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9
[2023-04-01 06:17:52,767 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399469417]
[2023-04-01 06:17:52,767 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 06:17:52,767 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 9 states
[2023-04-01 06:17:52,767 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 06:17:52,768 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2023-04-01 06:17:52,768 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72
[2023-04-01 06:17:52,768 INFO  L87              Difference]: Start difference. First operand 56 states and 59 transitions. Second operand  has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6)
[2023-04-01 06:17:52,915 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 06:17:52,915 INFO  L93              Difference]: Finished difference Result 91 states and 101 transitions.
[2023-04-01 06:17:52,916 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. 
[2023-04-01 06:17:52,916 INFO  L78                 Accepts]: Start accepts. Automaton has  has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 33
[2023-04-01 06:17:52,916 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 06:17:52,917 INFO  L225             Difference]: With dead ends: 91
[2023-04-01 06:17:52,918 INFO  L226             Difference]: Without dead ends: 89
[2023-04-01 06:17:52,918 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240
[2023-04-01 06:17:52,919 INFO  L413           NwaCegarLoop]: 44 mSDtfsCounter, 35 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-04-01 06:17:52,919 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 321 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-04-01 06:17:52,920 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 89 states.
[2023-04-01 06:17:52,938 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 65.
[2023-04-01 06:17:52,939 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 65 states, 38 states have (on average 1.105263157894737) internal successors, (42), 40 states have internal predecessors, (42), 13 states have call successors, (13), 13 states have call predecessors, (13), 13 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13)
[2023-04-01 06:17:52,939 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions.
[2023-04-01 06:17:52,940 INFO  L78                 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 33
[2023-04-01 06:17:52,940 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 06:17:52,940 INFO  L495      AbstractCegarLoop]: Abstraction has 65 states and 68 transitions.
[2023-04-01 06:17:52,940 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6)
[2023-04-01 06:17:52,940 INFO  L276                IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions.
[2023-04-01 06:17:52,941 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 57
[2023-04-01 06:17:52,941 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 06:17:52,942 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-01 06:17:52,942 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2023-04-01 06:17:52,942 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 06:17:52,942 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 06:17:52,942 INFO  L85        PathProgramCache]: Analyzing trace with hash 1711253707, now seen corresponding path program 1 times
[2023-04-01 06:17:52,943 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 06:17:52,943 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439060365]
[2023-04-01 06:17:52,943 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 06:17:52,943 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 06:17:53,050 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 06:17:56,694 INFO  L134       CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2023-04-01 06:17:56,694 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 06:17:56,694 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439060365]
[2023-04-01 06:17:56,695 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439060365] provided 0 perfect and 1 imperfect interpolant sequences
[2023-04-01 06:17:56,695 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47808908]
[2023-04-01 06:17:56,695 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 06:17:56,695 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-04-01 06:17:56,695 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-04-01 06:17:56,711 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 06:17:56,757 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 06:17:56,871 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 06:17:56,887 INFO  L262         TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 97 conjunts are in the unsatisfiable core
[2023-04-01 06:17:56,895 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-04-01 06:18:06,060 INFO  L134       CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-01 06:18:06,061 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-04-01 06:18:48,163 WARN  L176   XnfTransformerHelper]: Simplifying conjuction of 8225 disjunctions. This might take some time...