/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain IntervalDomain -i ../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c


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


This is Ultimate 0.2.3-dev-f954360
[2023-04-01 00:13:36,691 INFO  L177        SettingsManager]: Resetting all preferences to default values...
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[2023-04-01 00:13:36,788 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2023-04-01 00:13:36,791 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf
[2023-04-01 00:13:36,819 INFO  L113        SettingsManager]: Loading preferences was successful
[2023-04-01 00:13:36,820 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2023-04-01 00:13:36,820 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-04-01 00:13:36,821 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-04-01 00:13:36,821 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-04-01 00:13:36,822 INFO  L138        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-04-01 00:13:36,822 INFO  L138        SettingsManager]:  * User list type=DISABLED
[2023-04-01 00:13:36,822 INFO  L136        SettingsManager]: Preferences of Abstract Interpretation differ from their defaults:
[2023-04-01 00:13:36,822 INFO  L138        SettingsManager]:  * Explicit value domain=true
[2023-04-01 00:13:36,822 INFO  L138        SettingsManager]:  * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain
[2023-04-01 00:13:36,823 INFO  L138        SettingsManager]:  * Octagon Domain=false
[2023-04-01 00:13:36,823 INFO  L138        SettingsManager]:  * Abstract domain=CompoundDomain
[2023-04-01 00:13:36,823 INFO  L138        SettingsManager]:  * Check feasibility of abstract posts with an SMT solver=true
[2023-04-01 00:13:36,824 INFO  L138        SettingsManager]:  * Use the RCFG-of-the-future interface=true
[2023-04-01 00:13:36,824 INFO  L138        SettingsManager]:  * Interval Domain=false
[2023-04-01 00:13:36,824 INFO  L136        SettingsManager]: Preferences of Sifa differ from their defaults:
[2023-04-01 00:13:36,824 INFO  L138        SettingsManager]:  * Call Summarizer=TopInputCallSummarizer
[2023-04-01 00:13:36,824 INFO  L138        SettingsManager]:  * Simplification Technique=POLY_PAC
[2023-04-01 00:13:36,825 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-04-01 00:13:36,825 INFO  L138        SettingsManager]:  * sizeof long=4
[2023-04-01 00:13:36,825 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-04-01 00:13:36,825 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2023-04-01 00:13:36,825 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2023-04-01 00:13:36,826 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-04-01 00:13:36,826 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-04-01 00:13:36,826 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-04-01 00:13:36,826 INFO  L138        SettingsManager]:  * sizeof long double=12
[2023-04-01 00:13:36,826 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2023-04-01 00:13:36,826 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2023-04-01 00:13:36,826 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-04-01 00:13:36,826 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-04-01 00:13:36,827 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-04-01 00:13:36,827 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-04-01 00:13:36,827 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-04-01 00:13:36,827 INFO  L138        SettingsManager]:  * Abstract interpretation Mode=USE_PREDICATES
[2023-04-01 00:13:36,827 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-04-01 00:13:36,827 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2023-04-01 00:13:36,828 INFO  L138        SettingsManager]:  * Trace refinement strategy=SIFA_TAIPAN
[2023-04-01 00:13:36,828 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-04-01 00:13:36,828 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-04-01 00:13:36,828 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2023-04-01 00:13:36,828 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int)
WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain
[2023-04-01 00:13:37,079 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-04-01 00:13:37,108 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-04-01 00:13:37,111 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-04-01 00:13:37,112 INFO  L271        PluginConnector]: Initializing CDTParser...
[2023-04-01 00:13:37,113 INFO  L275        PluginConnector]: CDTParser initialized
[2023-04-01 00:13:37,114 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c
[2023-04-01 00:13:38,291 INFO  L500              CDTParser]: Created temporary CDT project at NULL
[2023-04-01 00:13:38,545 INFO  L351              CDTParser]: Found 1 translation units.
[2023-04-01 00:13:38,546 INFO  L172              CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c
[2023-04-01 00:13:38,558 INFO  L394              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f86a2a4c7/a76f140d744041df8f595af0bd855c4c/FLAGe4328f8ce
[2023-04-01 00:13:38,576 INFO  L402              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f86a2a4c7/a76f140d744041df8f595af0bd855c4c
[2023-04-01 00:13:38,578 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-04-01 00:13:38,580 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2023-04-01 00:13:38,583 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-04-01 00:13:38,583 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-04-01 00:13:38,586 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-04-01 00:13:38,586 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:13:38" (1/1) ...
[2023-04-01 00:13:38,588 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9e3d87c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:13:38, skipping insertion in model container
[2023-04-01 00:13:38,588 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:13:38" (1/1) ...
[2023-04-01 00:13:38,594 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2023-04-01 00:13:38,637 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2023-04-01 00:13:38,864 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-var-start-time.6.2.ufo.BOUNDED-12.pals.c[16824,16837]
[2023-04-01 00:13:38,867 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-04-01 00:13:38,878 INFO  L203         MainTranslator]: Completed pre-run
[2023-04-01 00:13:38,927 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-var-start-time.6.2.ufo.BOUNDED-12.pals.c[16824,16837]
[2023-04-01 00:13:38,928 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-04-01 00:13:38,944 INFO  L208         MainTranslator]: Completed translation
[2023-04-01 00:13:38,945 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:13:38 WrapperNode
[2023-04-01 00:13:38,945 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-04-01 00:13:38,946 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-04-01 00:13:38,946 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2023-04-01 00:13:38,946 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2023-04-01 00:13:38,955 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:13:38" (1/1) ...
[2023-04-01 00:13:38,956 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:13:38" (1/1) ...
[2023-04-01 00:13:38,965 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:13:38" (1/1) ...
[2023-04-01 00:13:38,965 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:13:38" (1/1) ...
[2023-04-01 00:13:38,978 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:13:38" (1/1) ...
[2023-04-01 00:13:38,987 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:13:38" (1/1) ...
[2023-04-01 00:13:38,990 INFO  L185        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:13:38" (1/1) ...
[2023-04-01 00:13:38,992 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:13:38" (1/1) ...
[2023-04-01 00:13:38,996 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-04-01 00:13:38,997 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-04-01 00:13:38,997 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2023-04-01 00:13:38,997 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2023-04-01 00:13:38,998 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:13:38" (1/1) ...
[2023-04-01 00:13:39,004 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-04-01 00:13:39,016 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-04-01 00:13:39,035 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2023-04-01 00:13:39,042 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2023-04-01 00:13:39,069 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2023-04-01 00:13:39,069 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-04-01 00:13:39,069 INFO  L138     BoogieDeclarations]: Found implementation of procedure reach_error
[2023-04-01 00:13:39,070 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2023-04-01 00:13:39,070 INFO  L138     BoogieDeclarations]: Found implementation of procedure node1
[2023-04-01 00:13:39,070 INFO  L138     BoogieDeclarations]: Found implementation of procedure node2
[2023-04-01 00:13:39,070 INFO  L138     BoogieDeclarations]: Found implementation of procedure node3
[2023-04-01 00:13:39,070 INFO  L138     BoogieDeclarations]: Found implementation of procedure node4
[2023-04-01 00:13:39,070 INFO  L138     BoogieDeclarations]: Found implementation of procedure node5
[2023-04-01 00:13:39,070 INFO  L138     BoogieDeclarations]: Found implementation of procedure node6
[2023-04-01 00:13:39,070 INFO  L138     BoogieDeclarations]: Found implementation of procedure init
[2023-04-01 00:13:39,071 INFO  L138     BoogieDeclarations]: Found implementation of procedure check
[2023-04-01 00:13:39,071 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2023-04-01 00:13:39,071 INFO  L138     BoogieDeclarations]: Found implementation of procedure assert
[2023-04-01 00:13:39,071 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2023-04-01 00:13:39,071 INFO  L130     BoogieDeclarations]: Found specification of procedure __assert_fail
[2023-04-01 00:13:39,071 INFO  L130     BoogieDeclarations]: Found specification of procedure reach_error
[2023-04-01 00:13:39,071 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-04-01 00:13:39,071 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool
[2023-04-01 00:13:39,072 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char
[2023-04-01 00:13:39,072 INFO  L130     BoogieDeclarations]: Found specification of procedure assert
[2023-04-01 00:13:39,072 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2023-04-01 00:13:39,072 INFO  L130     BoogieDeclarations]: Found specification of procedure read
[2023-04-01 00:13:39,072 INFO  L130     BoogieDeclarations]: Found specification of procedure write
[2023-04-01 00:13:39,072 INFO  L130     BoogieDeclarations]: Found specification of procedure node1
[2023-04-01 00:13:39,072 INFO  L130     BoogieDeclarations]: Found specification of procedure node2
[2023-04-01 00:13:39,072 INFO  L130     BoogieDeclarations]: Found specification of procedure node3
[2023-04-01 00:13:39,072 INFO  L130     BoogieDeclarations]: Found specification of procedure node4
[2023-04-01 00:13:39,072 INFO  L130     BoogieDeclarations]: Found specification of procedure node5
[2023-04-01 00:13:39,073 INFO  L130     BoogieDeclarations]: Found specification of procedure node6
[2023-04-01 00:13:39,073 INFO  L130     BoogieDeclarations]: Found specification of procedure init
[2023-04-01 00:13:39,073 INFO  L130     BoogieDeclarations]: Found specification of procedure check
[2023-04-01 00:13:39,073 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2023-04-01 00:13:39,073 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2023-04-01 00:13:39,073 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2023-04-01 00:13:39,073 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-04-01 00:13:39,073 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2023-04-01 00:13:39,073 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2023-04-01 00:13:39,074 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2023-04-01 00:13:39,166 INFO  L236             CfgBuilder]: Building ICFG
[2023-04-01 00:13:39,168 INFO  L262             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-04-01 00:13:39,773 INFO  L277             CfgBuilder]: Performing block encoding
[2023-04-01 00:13:40,349 INFO  L297             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-04-01 00:13:40,350 INFO  L302             CfgBuilder]: Removed 1 assume(true) statements.
[2023-04-01 00:13:40,352 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:13:40 BoogieIcfgContainer
[2023-04-01 00:13:40,352 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-04-01 00:13:40,355 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-04-01 00:13:40,355 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2023-04-01 00:13:40,358 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2023-04-01 00:13:40,358 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 12:13:38" (1/3) ...
[2023-04-01 00:13:40,359 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fb3afc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:13:40, skipping insertion in model container
[2023-04-01 00:13:40,359 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:13:38" (2/3) ...
[2023-04-01 00:13:40,359 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fb3afc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:13:40, skipping insertion in model container
[2023-04-01 00:13:40,359 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:13:40" (3/3) ...
[2023-04-01 00:13:40,361 INFO  L112   eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c
[2023-04-01 00:13:40,377 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-04-01 00:13:40,377 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-04-01 00:13:40,429 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-04-01 00:13:40,436 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;@32e7f598, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2023-04-01 00:13:40,437 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-04-01 00:13:40,441 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 48 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 12 states have call successors, (12), 12 states have call predecessors, (12), 12 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12)
[2023-04-01 00:13:40,449 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 42
[2023-04-01 00:13:40,449 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 00:13:40,450 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-01 00:13:40,451 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 00:13:40,457 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 00:13:40,457 INFO  L85        PathProgramCache]: Analyzing trace with hash 30047239, now seen corresponding path program 1 times
[2023-04-01 00:13:40,465 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 00:13:40,466 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979088516]
[2023-04-01 00:13:40,466 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 00:13:40,466 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 00:13:41,024 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 00:13:46,503 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-01 00:13:46,504 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 00:13:46,504 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979088516]
[2023-04-01 00:13:46,505 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979088516] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 00:13:46,505 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 00:13:46,505 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32
[2023-04-01 00:13:46,507 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546174358]
[2023-04-01 00:13:46,507 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 00:13:46,511 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 32 states
[2023-04-01 00:13:46,511 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 00:13:46,537 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants.
[2023-04-01 00:13:46,538 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=903, Unknown=0, NotChecked=0, Total=992
[2023-04-01 00:13:46,541 INFO  L87              Difference]: Start difference. First operand  has 48 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 12 states have call successors, (12), 12 states have call predecessors, (12), 12 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand  has 32 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 11 states have call successors, (12), 9 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10)
[2023-04-01 00:13:48,867 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 00:13:48,867 INFO  L93              Difference]: Finished difference Result 127 states and 140 transitions.
[2023-04-01 00:13:48,873 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. 
[2023-04-01 00:13:48,874 INFO  L78                 Accepts]: Start accepts. Automaton has  has 32 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 11 states have call successors, (12), 9 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 41
[2023-04-01 00:13:48,875 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 00:13:48,882 INFO  L225             Difference]: With dead ends: 127
[2023-04-01 00:13:48,883 INFO  L226             Difference]: Without dead ends: 86
[2023-04-01 00:13:48,887 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=583, Invalid=3077, Unknown=0, NotChecked=0, Total=3660
[2023-04-01 00:13:48,890 INFO  L413           NwaCegarLoop]: 26 mSDtfsCounter, 210 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 1029 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 1277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 1029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time
[2023-04-01 00:13:48,891 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 253 Invalid, 1277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 1029 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time]
[2023-04-01 00:13:48,908 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 86 states.
[2023-04-01 00:13:48,953 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 74.
[2023-04-01 00:13:48,955 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 74 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 35 states have internal predecessors, (35), 20 states have call successors, (20), 20 states have call predecessors, (20), 19 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19)
[2023-04-01 00:13:48,959 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions.
[2023-04-01 00:13:48,960 INFO  L78                 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 41
[2023-04-01 00:13:48,961 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 00:13:48,961 INFO  L495      AbstractCegarLoop]: Abstraction has 74 states and 74 transitions.
[2023-04-01 00:13:48,962 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 32 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 11 states have call successors, (12), 9 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10)
[2023-04-01 00:13:48,962 INFO  L276                IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions.
[2023-04-01 00:13:48,966 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 72
[2023-04-01 00:13:48,966 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 00:13:48,966 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-01 00:13:48,966 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-04-01 00:13:48,967 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 00:13:48,967 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 00:13:48,967 INFO  L85        PathProgramCache]: Analyzing trace with hash 1880779310, now seen corresponding path program 1 times
[2023-04-01 00:13:48,968 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 00:13:48,968 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288848258]
[2023-04-01 00:13:48,969 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 00:13:48,969 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 00:13:49,402 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 00:14:20,672 INFO  L134       CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2023-04-01 00:14:20,673 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 00:14:20,674 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288848258]
[2023-04-01 00:14:20,674 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288848258] provided 0 perfect and 1 imperfect interpolant sequences
[2023-04-01 00:14:20,675 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126801676]
[2023-04-01 00:14:20,676 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 00:14:20,678 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-04-01 00:14:20,682 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-04-01 00:14:20,687 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-04-01 00:14:20,688 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2023-04-01 00:14:21,004 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 00:14:21,019 INFO  L262         TraceCheckSpWp]: Trace formula consists of 972 conjuncts, 229 conjunts are in the unsatisfiable core
[2023-04-01 00:14:21,037 INFO  L285         TraceCheckSpWp]: Computing forward predicates...