/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 EqDomain -i ../sv-benchmarks/c/seq-mthreaded/pals_lcr.4_overflow.ufo.UNBOUNDED.pals.c


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


This is Ultimate 0.2.3-dev-f954360
[2023-04-01 12:24:41,460 INFO  L177        SettingsManager]: Resetting all preferences to default values...
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[2023-04-01 12:24:41,493 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2023-04-01 12:24:41,494 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
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[2023-04-01 12:24:41,505 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
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[2023-04-01 12:24:41,509 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2023-04-01 12:24:41,510 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2023-04-01 12:24:41,512 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2023-04-01 12:24:41,513 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2023-04-01 12:24:41,515 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2023-04-01 12:24:41,523 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2023-04-01 12:24:41,525 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2023-04-01 12:24:41,527 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2023-04-01 12:24:41,531 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
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[2023-04-01 12:24:41,538 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2023-04-01 12:24:41,539 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2023-04-01 12:24:41,541 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 12:24:41,572 INFO  L113        SettingsManager]: Loading preferences was successful
[2023-04-01 12:24:41,572 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2023-04-01 12:24:41,572 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-04-01 12:24:41,573 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-04-01 12:24:41,573 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-04-01 12:24:41,573 INFO  L138        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-04-01 12:24:41,574 INFO  L138        SettingsManager]:  * User list type=DISABLED
[2023-04-01 12:24:41,574 INFO  L136        SettingsManager]: Preferences of Abstract Interpretation differ from their defaults:
[2023-04-01 12:24:41,574 INFO  L138        SettingsManager]:  * Explicit value domain=true
[2023-04-01 12:24:41,574 INFO  L138        SettingsManager]:  * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain
[2023-04-01 12:24:41,575 INFO  L138        SettingsManager]:  * Octagon Domain=false
[2023-04-01 12:24:41,575 INFO  L138        SettingsManager]:  * Abstract domain=CompoundDomain
[2023-04-01 12:24:41,575 INFO  L138        SettingsManager]:  * Check feasibility of abstract posts with an SMT solver=true
[2023-04-01 12:24:41,575 INFO  L138        SettingsManager]:  * Use the RCFG-of-the-future interface=true
[2023-04-01 12:24:41,575 INFO  L138        SettingsManager]:  * Interval Domain=false
[2023-04-01 12:24:41,575 INFO  L136        SettingsManager]: Preferences of Sifa differ from their defaults:
[2023-04-01 12:24:41,575 INFO  L138        SettingsManager]:  * Call Summarizer=TopInputCallSummarizer
[2023-04-01 12:24:41,575 INFO  L138        SettingsManager]:  * Simplification Technique=POLY_PAC
[2023-04-01 12:24:41,576 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-04-01 12:24:41,576 INFO  L138        SettingsManager]:  * sizeof long=4
[2023-04-01 12:24:41,576 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-04-01 12:24:41,576 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2023-04-01 12:24:41,576 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2023-04-01 12:24:41,577 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-04-01 12:24:41,577 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-04-01 12:24:41,577 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-04-01 12:24:41,577 INFO  L138        SettingsManager]:  * sizeof long double=12
[2023-04-01 12:24:41,577 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2023-04-01 12:24:41,578 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2023-04-01 12:24:41,578 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-04-01 12:24:41,578 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-04-01 12:24:41,578 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-04-01 12:24:41,578 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-04-01 12:24:41,578 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-04-01 12:24:41,578 INFO  L138        SettingsManager]:  * Abstract interpretation Mode=USE_PREDICATES
[2023-04-01 12:24:41,579 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-04-01 12:24:41,579 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2023-04-01 12:24:41,579 INFO  L138        SettingsManager]:  * Trace refinement strategy=SIFA_TAIPAN
[2023-04-01 12:24:41,579 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-04-01 12:24:41,579 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-04-01 12:24:41,579 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2023-04-01 12:24:41,579 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain
[2023-04-01 12:24:41,844 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-04-01 12:24:41,866 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-04-01 12:24:41,868 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-04-01 12:24:41,869 INFO  L271        PluginConnector]: Initializing CDTParser...
[2023-04-01 12:24:41,870 INFO  L275        PluginConnector]: CDTParser initialized
[2023-04-01 12:24:41,871 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr.4_overflow.ufo.UNBOUNDED.pals.c
[2023-04-01 12:24:43,125 INFO  L500              CDTParser]: Created temporary CDT project at NULL
[2023-04-01 12:24:43,328 INFO  L351              CDTParser]: Found 1 translation units.
[2023-04-01 12:24:43,328 INFO  L172              CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.4_overflow.ufo.UNBOUNDED.pals.c
[2023-04-01 12:24:43,339 INFO  L394              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4015eb5e9/8a40fb8da37b4a0a94be16b3bf01ff52/FLAG8e844b13f
[2023-04-01 12:24:43,356 INFO  L402              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4015eb5e9/8a40fb8da37b4a0a94be16b3bf01ff52
[2023-04-01 12:24:43,359 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-04-01 12:24:43,361 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2023-04-01 12:24:43,364 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-04-01 12:24:43,364 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-04-01 12:24:43,367 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-04-01 12:24:43,368 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:24:43" (1/1) ...
[2023-04-01 12:24:43,369 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@408af3ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:24:43, skipping insertion in model container
[2023-04-01 12:24:43,369 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:24:43" (1/1) ...
[2023-04-01 12:24:43,376 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2023-04-01 12:24:43,411 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2023-04-01 12:24:43,565 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.4_overflow.ufo.UNBOUNDED.pals.c[8379,8392]
[2023-04-01 12:24:43,569 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-04-01 12:24:43,580 INFO  L203         MainTranslator]: Completed pre-run
[2023-04-01 12:24:43,642 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.4_overflow.ufo.UNBOUNDED.pals.c[8379,8392]
[2023-04-01 12:24:43,642 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-04-01 12:24:43,658 INFO  L208         MainTranslator]: Completed translation
[2023-04-01 12:24:43,658 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:24:43 WrapperNode
[2023-04-01 12:24:43,658 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-04-01 12:24:43,659 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-04-01 12:24:43,659 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2023-04-01 12:24:43,659 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2023-04-01 12:24:43,668 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:24:43" (1/1) ...
[2023-04-01 12:24:43,669 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:24:43" (1/1) ...
[2023-04-01 12:24:43,676 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:24:43" (1/1) ...
[2023-04-01 12:24:43,676 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:24:43" (1/1) ...
[2023-04-01 12:24:43,691 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:24:43" (1/1) ...
[2023-04-01 12:24:43,697 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:24:43" (1/1) ...
[2023-04-01 12:24:43,699 INFO  L185        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:24:43" (1/1) ...
[2023-04-01 12:24:43,700 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:24:43" (1/1) ...
[2023-04-01 12:24:43,703 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-04-01 12:24:43,704 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-04-01 12:24:43,704 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2023-04-01 12:24:43,705 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2023-04-01 12:24:43,705 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:24:43" (1/1) ...
[2023-04-01 12:24:43,713 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-04-01 12:24:43,731 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-04-01 12:24:43,742 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 12:24:43,757 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 12:24:43,775 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2023-04-01 12:24:43,776 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-04-01 12:24:43,776 INFO  L138     BoogieDeclarations]: Found implementation of procedure reach_error
[2023-04-01 12:24:43,781 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2023-04-01 12:24:43,781 INFO  L138     BoogieDeclarations]: Found implementation of procedure node1
[2023-04-01 12:24:43,781 INFO  L138     BoogieDeclarations]: Found implementation of procedure node2
[2023-04-01 12:24:43,781 INFO  L138     BoogieDeclarations]: Found implementation of procedure node3
[2023-04-01 12:24:43,782 INFO  L138     BoogieDeclarations]: Found implementation of procedure node4
[2023-04-01 12:24:43,782 INFO  L138     BoogieDeclarations]: Found implementation of procedure init
[2023-04-01 12:24:43,782 INFO  L138     BoogieDeclarations]: Found implementation of procedure check
[2023-04-01 12:24:43,782 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2023-04-01 12:24:43,782 INFO  L138     BoogieDeclarations]: Found implementation of procedure assert
[2023-04-01 12:24:43,782 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2023-04-01 12:24:43,782 INFO  L130     BoogieDeclarations]: Found specification of procedure __assert_fail
[2023-04-01 12:24:43,782 INFO  L130     BoogieDeclarations]: Found specification of procedure reach_error
[2023-04-01 12:24:43,783 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-04-01 12:24:43,783 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool
[2023-04-01 12:24:43,783 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char
[2023-04-01 12:24:43,783 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar
[2023-04-01 12:24:43,784 INFO  L130     BoogieDeclarations]: Found specification of procedure assert
[2023-04-01 12:24:43,784 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2023-04-01 12:24:43,784 INFO  L130     BoogieDeclarations]: Found specification of procedure read
[2023-04-01 12:24:43,784 INFO  L130     BoogieDeclarations]: Found specification of procedure write
[2023-04-01 12:24:43,784 INFO  L130     BoogieDeclarations]: Found specification of procedure node1
[2023-04-01 12:24:43,784 INFO  L130     BoogieDeclarations]: Found specification of procedure node2
[2023-04-01 12:24:43,784 INFO  L130     BoogieDeclarations]: Found specification of procedure node3
[2023-04-01 12:24:43,784 INFO  L130     BoogieDeclarations]: Found specification of procedure node4
[2023-04-01 12:24:43,785 INFO  L130     BoogieDeclarations]: Found specification of procedure init
[2023-04-01 12:24:43,785 INFO  L130     BoogieDeclarations]: Found specification of procedure check
[2023-04-01 12:24:43,785 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2023-04-01 12:24:43,785 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2023-04-01 12:24:43,785 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2023-04-01 12:24:43,785 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-04-01 12:24:43,785 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2023-04-01 12:24:43,785 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2023-04-01 12:24:43,785 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2023-04-01 12:24:43,870 INFO  L236             CfgBuilder]: Building ICFG
[2023-04-01 12:24:43,871 INFO  L262             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-04-01 12:24:44,271 INFO  L277             CfgBuilder]: Performing block encoding
[2023-04-01 12:24:44,569 INFO  L297             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-04-01 12:24:44,569 INFO  L302             CfgBuilder]: Removed 1 assume(true) statements.
[2023-04-01 12:24:44,572 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:24:44 BoogieIcfgContainer
[2023-04-01 12:24:44,573 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-04-01 12:24:44,575 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-04-01 12:24:44,575 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2023-04-01 12:24:44,578 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2023-04-01 12:24:44,579 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 12:24:43" (1/3) ...
[2023-04-01 12:24:44,579 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29a726c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:24:44, skipping insertion in model container
[2023-04-01 12:24:44,580 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:24:43" (2/3) ...
[2023-04-01 12:24:44,580 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29a726c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:24:44, skipping insertion in model container
[2023-04-01 12:24:44,580 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:24:44" (3/3) ...
[2023-04-01 12:24:44,581 INFO  L112   eAbstractionObserver]: Analyzing ICFG pals_lcr.4_overflow.ufo.UNBOUNDED.pals.c
[2023-04-01 12:24:44,597 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-04-01 12:24:44,598 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-04-01 12:24:44,649 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-04-01 12:24:44,654 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;@b622f0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2023-04-01 12:24:44,654 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-04-01 12:24:44,658 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 46 states, 24 states have (on average 1.25) internal successors, (30), 26 states have internal predecessors, (30), 10 states have call successors, (10), 10 states have call predecessors, (10), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10)
[2023-04-01 12:24:44,664 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 38
[2023-04-01 12:24:44,664 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 12:24:44,664 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-01 12:24:44,665 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 12:24:44,669 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 12:24:44,670 INFO  L85        PathProgramCache]: Analyzing trace with hash 24412382, now seen corresponding path program 1 times
[2023-04-01 12:24:44,678 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 12:24:44,678 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076251029]
[2023-04-01 12:24:44,678 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 12:24:44,679 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 12:24:44,987 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 12:24:47,493 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 12:24:47,494 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 12:24:47,494 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076251029]
[2023-04-01 12:24:47,494 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076251029] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 12:24:47,494 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 12:24:47,495 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22
[2023-04-01 12:24:47,496 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438311088]
[2023-04-01 12:24:47,497 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 12:24:47,500 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 22 states
[2023-04-01 12:24:47,500 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 12:24:47,524 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants.
[2023-04-01 12:24:47,525 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462
[2023-04-01 12:24:47,527 INFO  L87              Difference]: Start difference. First operand  has 46 states, 24 states have (on average 1.25) internal successors, (30), 26 states have internal predecessors, (30), 10 states have call successors, (10), 10 states have call predecessors, (10), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand  has 22 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 13 states have internal predecessors, (19), 9 states have call successors, (10), 7 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8)
[2023-04-01 12:24:48,648 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 12:24:48,649 INFO  L93              Difference]: Finished difference Result 106 states and 124 transitions.
[2023-04-01 12:24:48,650 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. 
[2023-04-01 12:24:48,651 INFO  L78                 Accepts]: Start accepts. Automaton has  has 22 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 13 states have internal predecessors, (19), 9 states have call successors, (10), 7 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 37
[2023-04-01 12:24:48,652 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 12:24:48,658 INFO  L225             Difference]: With dead ends: 106
[2023-04-01 12:24:48,658 INFO  L226             Difference]: Without dead ends: 73
[2023-04-01 12:24:48,661 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=377, Invalid=1603, Unknown=0, NotChecked=0, Total=1980
[2023-04-01 12:24:48,664 INFO  L413           NwaCegarLoop]: 20 mSDtfsCounter, 286 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time
[2023-04-01 12:24:48,665 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [292 Valid, 113 Invalid, 776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 605 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time]
[2023-04-01 12:24:48,680 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 73 states.
[2023-04-01 12:24:48,707 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 62.
[2023-04-01 12:24:48,709 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 62 states, 32 states have (on average 1.125) internal successors, (36), 33 states have internal predecessors, (36), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15)
[2023-04-01 12:24:48,710 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions.
[2023-04-01 12:24:48,711 INFO  L78                 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 37
[2023-04-01 12:24:48,712 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 12:24:48,712 INFO  L495      AbstractCegarLoop]: Abstraction has 62 states and 66 transitions.
[2023-04-01 12:24:48,712 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 22 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 13 states have internal predecessors, (19), 9 states have call successors, (10), 7 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8)
[2023-04-01 12:24:48,712 INFO  L276                IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions.
[2023-04-01 12:24:48,714 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 40
[2023-04-01 12:24:48,714 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 12:24:48,714 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]
[2023-04-01 12:24:48,714 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-04-01 12:24:48,715 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 12:24:48,715 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 12:24:48,715 INFO  L85        PathProgramCache]: Analyzing trace with hash -1893739361, now seen corresponding path program 1 times
[2023-04-01 12:24:48,715 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 12:24:48,716 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120681223]
[2023-04-01 12:24:48,716 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 12:24:48,716 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 12:24:48,768 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 12:24:49,102 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 12:24:49,103 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 12:24:49,103 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120681223]
[2023-04-01 12:24:49,103 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120681223] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 12:24:49,103 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 12:24:49,104 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11
[2023-04-01 12:24:49,104 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527021602]
[2023-04-01 12:24:49,104 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 12:24:49,105 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 11 states
[2023-04-01 12:24:49,105 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 12:24:49,106 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2023-04-01 12:24:49,106 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110
[2023-04-01 12:24:49,106 INFO  L87              Difference]: Start difference. First operand 62 states and 66 transitions. Second operand  has 11 states, 7 states have (on average 3.0) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8)
[2023-04-01 12:24:49,470 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 12:24:49,470 INFO  L93              Difference]: Finished difference Result 124 states and 135 transitions.
[2023-04-01 12:24:49,470 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. 
[2023-04-01 12:24:49,471 INFO  L78                 Accepts]: Start accepts. Automaton has  has 11 states, 7 states have (on average 3.0) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 39
[2023-04-01 12:24:49,471 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 12:24:49,472 INFO  L225             Difference]: With dead ends: 124
[2023-04-01 12:24:49,472 INFO  L226             Difference]: Without dead ends: 92
[2023-04-01 12:24:49,473 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272
[2023-04-01 12:24:49,474 INFO  L413           NwaCegarLoop]: 22 mSDtfsCounter, 105 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2023-04-01 12:24:49,475 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 94 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time]
[2023-04-01 12:24:49,479 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 92 states.
[2023-04-01 12:24:49,509 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 65.
[2023-04-01 12:24:49,509 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 65 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 36 states have internal predecessors, (40), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14)
[2023-04-01 12:24:49,513 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions.
[2023-04-01 12:24:49,513 INFO  L78                 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 39
[2023-04-01 12:24:49,513 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 12:24:49,513 INFO  L495      AbstractCegarLoop]: Abstraction has 65 states and 69 transitions.
[2023-04-01 12:24:49,514 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 11 states, 7 states have (on average 3.0) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8)
[2023-04-01 12:24:49,514 INFO  L276                IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions.
[2023-04-01 12:24:49,516 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 40
[2023-04-01 12:24:49,516 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 12:24:49,516 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]
[2023-04-01 12:24:49,517 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-04-01 12:24:49,517 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 12:24:49,517 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 12:24:49,517 INFO  L85        PathProgramCache]: Analyzing trace with hash -1014577434, now seen corresponding path program 1 times
[2023-04-01 12:24:49,518 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 12:24:49,518 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80286772]
[2023-04-01 12:24:49,518 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 12:24:49,518 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 12:24:49,588 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 12:24:50,961 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 12:24:50,961 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 12:24:50,961 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80286772]
[2023-04-01 12:24:50,962 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80286772] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 12:24:50,962 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 12:24:50,962 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22
[2023-04-01 12:24:50,962 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733950383]
[2023-04-01 12:24:50,962 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 12:24:50,963 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 22 states
[2023-04-01 12:24:50,963 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 12:24:50,963 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants.
[2023-04-01 12:24:50,964 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462
[2023-04-01 12:24:50,964 INFO  L87              Difference]: Start difference. First operand 65 states and 69 transitions. Second operand  has 22 states, 12 states have (on average 1.75) internal successors, (21), 13 states have internal predecessors, (21), 9 states have call successors, (10), 7 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8)
[2023-04-01 12:24:51,958 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 12:24:51,958 INFO  L93              Difference]: Finished difference Result 124 states and 133 transitions.
[2023-04-01 12:24:51,958 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. 
[2023-04-01 12:24:51,959 INFO  L78                 Accepts]: Start accepts. Automaton has  has 22 states, 12 states have (on average 1.75) internal successors, (21), 13 states have internal predecessors, (21), 9 states have call successors, (10), 7 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 39
[2023-04-01 12:24:51,959 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 12:24:51,960 INFO  L225             Difference]: With dead ends: 124
[2023-04-01 12:24:51,960 INFO  L226             Difference]: Without dead ends: 92
[2023-04-01 12:24:51,961 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=354, Invalid=1452, Unknown=0, NotChecked=0, Total=1806
[2023-04-01 12:24:51,962 INFO  L413           NwaCegarLoop]: 20 mSDtfsCounter, 327 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time
[2023-04-01 12:24:51,963 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [335 Valid, 104 Invalid, 738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time]
[2023-04-01 12:24:51,963 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 92 states.
[2023-04-01 12:24:51,983 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 65.
[2023-04-01 12:24:51,983 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 65 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 36 states have internal predecessors, (39), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14)
[2023-04-01 12:24:51,985 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions.
[2023-04-01 12:24:51,985 INFO  L78                 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 39
[2023-04-01 12:24:51,985 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 12:24:51,986 INFO  L495      AbstractCegarLoop]: Abstraction has 65 states and 68 transitions.
[2023-04-01 12:24:51,986 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 22 states, 12 states have (on average 1.75) internal successors, (21), 13 states have internal predecessors, (21), 9 states have call successors, (10), 7 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8)
[2023-04-01 12:24:51,986 INFO  L276                IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions.
[2023-04-01 12:24:51,987 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 41
[2023-04-01 12:24:51,988 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 12:24:51,989 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-01 12:24:51,989 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2023-04-01 12:24:51,989 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 12:24:51,989 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 12:24:51,989 INFO  L85        PathProgramCache]: Analyzing trace with hash 1841111820, now seen corresponding path program 1 times
[2023-04-01 12:24:51,990 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 12:24:51,990 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728378612]
[2023-04-01 12:24:51,990 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 12:24:51,990 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 12:24:52,019 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 12:24:52,706 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 12:24:52,707 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 12:24:52,707 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728378612]
[2023-04-01 12:24:52,707 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728378612] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 12:24:52,707 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 12:24:52,707 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13
[2023-04-01 12:24:52,707 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222019413]
[2023-04-01 12:24:52,708 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 12:24:52,708 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 13 states
[2023-04-01 12:24:52,708 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 12:24:52,709 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants.
[2023-04-01 12:24:52,709 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156
[2023-04-01 12:24:52,709 INFO  L87              Difference]: Start difference. First operand 65 states and 68 transitions. Second operand  has 13 states, 8 states have (on average 2.75) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8)
[2023-04-01 12:24:53,005 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 12:24:53,006 INFO  L93              Difference]: Finished difference Result 99 states and 110 transitions.
[2023-04-01 12:24:53,006 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. 
[2023-04-01 12:24:53,006 INFO  L78                 Accepts]: Start accepts. Automaton has  has 13 states, 8 states have (on average 2.75) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 40
[2023-04-01 12:24:53,007 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 12:24:53,008 INFO  L225             Difference]: With dead ends: 99
[2023-04-01 12:24:53,008 INFO  L226             Difference]: Without dead ends: 97
[2023-04-01 12:24:53,008 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462
[2023-04-01 12:24:53,009 INFO  L413           NwaCegarLoop]: 49 mSDtfsCounter, 35 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-04-01 12:24:53,010 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 517 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-04-01 12:24:53,010 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 97 states.
[2023-04-01 12:24:53,038 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 74.
[2023-04-01 12:24:53,038 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 74 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 43 states have internal predecessors, (45), 16 states have call successors, (16), 16 states have call predecessors, (16), 16 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16)
[2023-04-01 12:24:53,040 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions.
[2023-04-01 12:24:53,040 INFO  L78                 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 40
[2023-04-01 12:24:53,042 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 12:24:53,042 INFO  L495      AbstractCegarLoop]: Abstraction has 74 states and 77 transitions.
[2023-04-01 12:24:53,042 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 13 states, 8 states have (on average 2.75) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8)
[2023-04-01 12:24:53,042 INFO  L276                IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions.
[2023-04-01 12:24:53,044 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 66
[2023-04-01 12:24:53,044 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 12:24:53,044 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, 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 12:24:53,044 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2023-04-01 12:24:53,045 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 12:24:53,045 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 12:24:53,045 INFO  L85        PathProgramCache]: Analyzing trace with hash -1496209457, now seen corresponding path program 1 times
[2023-04-01 12:24:53,046 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 12:24:53,046 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255309745]
[2023-04-01 12:24:53,046 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 12:24:53,046 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 12:24:53,169 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 12:25:00,523 INFO  L134       CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2023-04-01 12:25:00,524 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 12:25:00,524 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255309745]
[2023-04-01 12:25:00,524 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255309745] provided 0 perfect and 1 imperfect interpolant sequences
[2023-04-01 12:25:00,524 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383748495]
[2023-04-01 12:25:00,524 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 12:25:00,525 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-04-01 12:25:00,525 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-04-01 12:25:00,537 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 12:25:00,558 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 12:25:00,762 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 12:25:00,771 INFO  L262         TraceCheckSpWp]: Trace formula consists of 656 conjuncts, 168 conjunts are in the unsatisfiable core
[2023-04-01 12:25:00,785 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-04-01 12:25:23,663 INFO  L134       CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-01 12:25:23,664 INFO  L327         TraceCheckSpWp]: Computing backward predicates...