/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/eca-rers2012/Problem18_label42.c


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


This is Ultimate 0.2.3-dev-f954360
[2023-04-01 10:31:33,994 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2023-04-01 10:31:33,996 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
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[2023-04-01 10:31:34,029 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2023-04-01 10:31:34,031 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2023-04-01 10:31:34,033 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2023-04-01 10:31:34,035 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2023-04-01 10:31:34,036 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2023-04-01 10:31:34,039 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2023-04-01 10:31:34,040 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
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[2023-04-01 10:31:34,042 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
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[2023-04-01 10:31:34,046 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2023-04-01 10:31:34,046 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2023-04-01 10:31:34,048 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
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[2023-04-01 10:31:34,068 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2023-04-01 10:31:34,069 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2023-04-01 10:31:34,070 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 10:31:34,093 INFO  L113        SettingsManager]: Loading preferences was successful
[2023-04-01 10:31:34,093 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2023-04-01 10:31:34,093 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-04-01 10:31:34,093 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-04-01 10:31:34,094 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-04-01 10:31:34,094 INFO  L138        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-04-01 10:31:34,094 INFO  L138        SettingsManager]:  * User list type=DISABLED
[2023-04-01 10:31:34,094 INFO  L136        SettingsManager]: Preferences of Abstract Interpretation differ from their defaults:
[2023-04-01 10:31:34,094 INFO  L138        SettingsManager]:  * Explicit value domain=true
[2023-04-01 10:31:34,094 INFO  L138        SettingsManager]:  * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain
[2023-04-01 10:31:34,095 INFO  L138        SettingsManager]:  * Octagon Domain=false
[2023-04-01 10:31:34,095 INFO  L138        SettingsManager]:  * Abstract domain=CompoundDomain
[2023-04-01 10:31:34,095 INFO  L138        SettingsManager]:  * Check feasibility of abstract posts with an SMT solver=true
[2023-04-01 10:31:34,095 INFO  L138        SettingsManager]:  * Use the RCFG-of-the-future interface=true
[2023-04-01 10:31:34,095 INFO  L138        SettingsManager]:  * Interval Domain=false
[2023-04-01 10:31:34,095 INFO  L136        SettingsManager]: Preferences of Sifa differ from their defaults:
[2023-04-01 10:31:34,096 INFO  L138        SettingsManager]:  * Call Summarizer=TopInputCallSummarizer
[2023-04-01 10:31:34,096 INFO  L138        SettingsManager]:  * Simplification Technique=POLY_PAC
[2023-04-01 10:31:34,096 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-04-01 10:31:34,096 INFO  L138        SettingsManager]:  * sizeof long=4
[2023-04-01 10:31:34,096 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-04-01 10:31:34,096 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2023-04-01 10:31:34,096 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2023-04-01 10:31:34,096 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-04-01 10:31:34,097 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-04-01 10:31:34,097 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-04-01 10:31:34,097 INFO  L138        SettingsManager]:  * sizeof long double=12
[2023-04-01 10:31:34,097 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2023-04-01 10:31:34,097 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2023-04-01 10:31:34,097 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-04-01 10:31:34,097 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-04-01 10:31:34,098 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-04-01 10:31:34,098 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-04-01 10:31:34,098 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-04-01 10:31:34,098 INFO  L138        SettingsManager]:  * Abstract interpretation Mode=USE_PREDICATES
[2023-04-01 10:31:34,098 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-04-01 10:31:34,098 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2023-04-01 10:31:34,098 INFO  L138        SettingsManager]:  * Trace refinement strategy=SIFA_TAIPAN
[2023-04-01 10:31:34,098 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-04-01 10:31:34,098 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-04-01 10:31:34,099 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2023-04-01 10:31:34,099 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain
[2023-04-01 10:31:34,281 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-04-01 10:31:34,297 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-04-01 10:31:34,299 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-04-01 10:31:34,300 INFO  L271        PluginConnector]: Initializing CDTParser...
[2023-04-01 10:31:34,300 INFO  L275        PluginConnector]: CDTParser initialized
[2023-04-01 10:31:34,301 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem18_label42.c
[2023-04-01 10:31:35,380 INFO  L500              CDTParser]: Created temporary CDT project at NULL
[2023-04-01 10:31:35,651 INFO  L351              CDTParser]: Found 1 translation units.
[2023-04-01 10:31:35,651 INFO  L172              CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem18_label42.c
[2023-04-01 10:31:35,664 INFO  L394              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f5bd041c/3a562078edd740ccab30fc999f0b538c/FLAG13cf0d963
[2023-04-01 10:31:35,673 INFO  L402              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f5bd041c/3a562078edd740ccab30fc999f0b538c
[2023-04-01 10:31:35,674 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-04-01 10:31:35,675 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2023-04-01 10:31:35,676 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-04-01 10:31:35,676 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-04-01 10:31:35,678 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-04-01 10:31:35,678 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:31:35" (1/1) ...
[2023-04-01 10:31:35,679 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cfd150a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:31:35, skipping insertion in model container
[2023-04-01 10:31:35,679 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:31:35" (1/1) ...
[2023-04-01 10:31:35,683 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2023-04-01 10:31:35,733 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2023-04-01 10:31:35,883 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/eca-rers2012/Problem18_label42.c[5213,5226]
[2023-04-01 10:31:36,243 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-04-01 10:31:36,250 INFO  L203         MainTranslator]: Completed pre-run
[2023-04-01 10:31:36,263 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/eca-rers2012/Problem18_label42.c[5213,5226]
[2023-04-01 10:31:36,451 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-04-01 10:31:36,465 INFO  L208         MainTranslator]: Completed translation
[2023-04-01 10:31:36,465 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:31:36 WrapperNode
[2023-04-01 10:31:36,466 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-04-01 10:31:36,466 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-04-01 10:31:36,466 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2023-04-01 10:31:36,466 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2023-04-01 10:31:36,473 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:31:36" (1/1) ...
[2023-04-01 10:31:36,474 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:31:36" (1/1) ...
[2023-04-01 10:31:36,525 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:31:36" (1/1) ...
[2023-04-01 10:31:36,525 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:31:36" (1/1) ...
[2023-04-01 10:31:36,582 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:31:36" (1/1) ...
[2023-04-01 10:31:36,599 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:31:36" (1/1) ...
[2023-04-01 10:31:36,609 INFO  L185        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:31:36" (1/1) ...
[2023-04-01 10:31:36,616 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:31:36" (1/1) ...
[2023-04-01 10:31:36,626 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-04-01 10:31:36,627 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-04-01 10:31:36,627 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2023-04-01 10:31:36,627 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2023-04-01 10:31:36,628 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:31:36" (1/1) ...
[2023-04-01 10:31:36,633 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-04-01 10:31:36,639 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-04-01 10:31:36,648 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 10:31:36,673 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2023-04-01 10:31:36,673 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-04-01 10:31:36,673 INFO  L138     BoogieDeclarations]: Found implementation of procedure reach_error
[2023-04-01 10:31:36,673 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output
[2023-04-01 10:31:36,673 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output2
[2023-04-01 10:31:36,673 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output3
[2023-04-01 10:31:36,673 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2023-04-01 10:31:36,673 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output
[2023-04-01 10:31:36,674 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output2
[2023-04-01 10:31:36,674 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output3
[2023-04-01 10:31:36,674 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2023-04-01 10:31:36,674 INFO  L130     BoogieDeclarations]: Found specification of procedure __assert_fail
[2023-04-01 10:31:36,674 INFO  L130     BoogieDeclarations]: Found specification of procedure reach_error
[2023-04-01 10:31:36,674 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-04-01 10:31:36,674 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2023-04-01 10:31:36,674 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2023-04-01 10:31:36,674 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2023-04-01 10:31:36,674 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2023-04-01 10:31:36,674 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2023-04-01 10:31:36,674 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-04-01 10:31:36,674 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2023-04-01 10:31:36,674 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2023-04-01 10:31:36,674 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2023-04-01 10:31:36,664 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 10:31:36,740 INFO  L236             CfgBuilder]: Building ICFG
[2023-04-01 10:31:36,742 INFO  L262             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-04-01 10:31:38,876 INFO  L277             CfgBuilder]: Performing block encoding
[2023-04-01 10:31:45,019 INFO  L297             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-04-01 10:31:45,019 INFO  L302             CfgBuilder]: Removed 1 assume(true) statements.
[2023-04-01 10:31:45,025 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:31:45 BoogieIcfgContainer
[2023-04-01 10:31:45,026 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-04-01 10:31:45,041 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-04-01 10:31:45,041 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2023-04-01 10:31:45,043 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2023-04-01 10:31:45,044 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 10:31:35" (1/3) ...
[2023-04-01 10:31:45,044 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43c1a22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:31:45, skipping insertion in model container
[2023-04-01 10:31:45,044 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:31:36" (2/3) ...
[2023-04-01 10:31:45,044 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43c1a22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:31:45, skipping insertion in model container
[2023-04-01 10:31:45,044 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:31:45" (3/3) ...
[2023-04-01 10:31:45,045 INFO  L112   eAbstractionObserver]: Analyzing ICFG Problem18_label42.c
[2023-04-01 10:31:45,058 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-04-01 10:31:45,059 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-04-01 10:31:45,093 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-04-01 10:31:45,097 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;@1a7d8dd6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2023-04-01 10:31:45,098 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-04-01 10:31:45,103 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 469 states, 457 states have (on average 1.9715536105032823) internal successors, (901), 458 states have internal predecessors, (901), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5)
[2023-04-01 10:31:45,108 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 12
[2023-04-01 10:31:45,109 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 10:31:45,109 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-01 10:31:45,110 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 10:31:45,113 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 10:31:45,113 INFO  L85        PathProgramCache]: Analyzing trace with hash 510747620, now seen corresponding path program 1 times
[2023-04-01 10:31:45,119 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 10:31:45,119 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083025890]
[2023-04-01 10:31:45,119 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 10:31:45,120 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 10:31:45,222 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 10:31:45,395 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 10:31:45,395 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 10:31:45,395 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083025890]
[2023-04-01 10:31:45,396 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083025890] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 10:31:45,396 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 10:31:45,396 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-04-01 10:31:45,397 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722546364]
[2023-04-01 10:31:45,398 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 10:31:45,400 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-04-01 10:31:45,400 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 10:31:45,420 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-04-01 10:31:45,421 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-04-01 10:31:45,423 INFO  L87              Difference]: Start difference. First operand  has 469 states, 457 states have (on average 1.9715536105032823) internal successors, (901), 458 states have internal predecessors, (901), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand  has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2023-04-01 10:31:47,032 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 10:31:47,033 INFO  L93              Difference]: Finished difference Result 1393 states and 2727 transitions.
[2023-04-01 10:31:47,034 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-04-01 10:31:47,035 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11
[2023-04-01 10:31:47,035 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 10:31:47,051 INFO  L225             Difference]: With dead ends: 1393
[2023-04-01 10:31:47,051 INFO  L226             Difference]: Without dead ends: 921
[2023-04-01 10:31:47,057 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-04-01 10:31:47,060 INFO  L413           NwaCegarLoop]: 50 mSDtfsCounter, 482 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 1353 mSolverCounterSat, 761 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 482 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 2114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 761 IncrementalHoareTripleChecker+Valid, 1353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time
[2023-04-01 10:31:47,060 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [482 Valid, 70 Invalid, 2114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [761 Valid, 1353 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time]
[2023-04-01 10:31:47,073 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 921 states.
[2023-04-01 10:31:47,141 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 890.
[2023-04-01 10:31:47,155 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 890 states, 876 states have (on average 1.9429223744292237) internal successors, (1702), 876 states have internal predecessors, (1702), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10)
[2023-04-01 10:31:47,158 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 1719 transitions.
[2023-04-01 10:31:47,159 INFO  L78                 Accepts]: Start accepts. Automaton has 890 states and 1719 transitions. Word has length 11
[2023-04-01 10:31:47,159 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 10:31:47,159 INFO  L495      AbstractCegarLoop]: Abstraction has 890 states and 1719 transitions.
[2023-04-01 10:31:47,159 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2023-04-01 10:31:47,160 INFO  L276                IsEmpty]: Start isEmpty. Operand 890 states and 1719 transitions.
[2023-04-01 10:31:47,160 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 27
[2023-04-01 10:31:47,160 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 10:31:47,161 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-01 10:31:47,161 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-04-01 10:31:47,161 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 10:31:47,161 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 10:31:47,161 INFO  L85        PathProgramCache]: Analyzing trace with hash -1331200059, now seen corresponding path program 1 times
[2023-04-01 10:31:47,162 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 10:31:47,162 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169177696]
[2023-04-01 10:31:47,162 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 10:31:47,162 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 10:31:47,192 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 10:31:47,388 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-01 10:31:47,389 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 10:31:47,389 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169177696]
[2023-04-01 10:31:47,389 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169177696] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 10:31:47,389 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 10:31:47,390 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2023-04-01 10:31:47,390 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871169984]
[2023-04-01 10:31:47,390 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 10:31:47,391 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-04-01 10:31:47,392 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 10:31:47,549 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-04-01 10:31:47,549 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2023-04-01 10:31:47,549 INFO  L87              Difference]: Start difference. First operand 890 states and 1719 transitions. Second operand  has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2023-04-01 10:31:50,569 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 10:31:50,570 INFO  L93              Difference]: Finished difference Result 2711 states and 5257 transitions.
[2023-04-01 10:31:50,574 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2023-04-01 10:31:50,575 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26
[2023-04-01 10:31:50,575 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 10:31:50,583 INFO  L225             Difference]: With dead ends: 2711
[2023-04-01 10:31:50,583 INFO  L226             Difference]: Without dead ends: 1826
[2023-04-01 10:31:50,585 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56
[2023-04-01 10:31:50,586 INFO  L413           NwaCegarLoop]: 33 mSDtfsCounter, 1555 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 2838 mSolverCounterSat, 549 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1555 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 3387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 549 IncrementalHoareTripleChecker+Valid, 2838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time
[2023-04-01 10:31:50,587 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1555 Valid, 93 Invalid, 3387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [549 Valid, 2838 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time]
[2023-04-01 10:31:50,588 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1826 states.
[2023-04-01 10:31:50,676 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1826 to 1587.
[2023-04-01 10:31:50,678 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 1587 states, 1556 states have (on average 1.6632390745501284) internal successors, (2588), 1561 states have internal predecessors, (2588), 10 states have call successors, (10), 10 states have call predecessors, (10), 20 states have return successors, (48), 15 states have call predecessors, (48), 9 states have call successors, (48)
[2023-04-01 10:31:50,682 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1587 states to 1587 states and 2646 transitions.
[2023-04-01 10:31:50,683 INFO  L78                 Accepts]: Start accepts. Automaton has 1587 states and 2646 transitions. Word has length 26
[2023-04-01 10:31:50,683 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 10:31:50,683 INFO  L495      AbstractCegarLoop]: Abstraction has 1587 states and 2646 transitions.
[2023-04-01 10:31:50,683 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2023-04-01 10:31:50,683 INFO  L276                IsEmpty]: Start isEmpty. Operand 1587 states and 2646 transitions.
[2023-04-01 10:31:50,684 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 37
[2023-04-01 10:31:50,684 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 10:31:50,684 INFO  L195           NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-01 10:31:50,691 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-04-01 10:31:50,691 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 10:31:50,692 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 10:31:50,692 INFO  L85        PathProgramCache]: Analyzing trace with hash 1545167183, now seen corresponding path program 1 times
[2023-04-01 10:31:50,692 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 10:31:50,692 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489301144]
[2023-04-01 10:31:50,692 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 10:31:50,692 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 10:31:50,722 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 10:31:50,901 INFO  L134       CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2023-04-01 10:31:50,902 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 10:31:50,902 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489301144]
[2023-04-01 10:31:50,902 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489301144] provided 0 perfect and 1 imperfect interpolant sequences
[2023-04-01 10:31:50,902 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745845123]
[2023-04-01 10:31:50,902 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 10:31:50,902 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-04-01 10:31:50,903 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-04-01 10:31:50,905 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 10:31:50,906 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 10:31:51,028 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 10:31:51,031 INFO  L262         TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-04-01 10:31:51,034 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-04-01 10:31:51,127 INFO  L134       CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2023-04-01 10:31:51,128 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-04-01 10:31:51,128 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [745845123] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 10:31:51,128 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-04-01 10:31:51,128 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8
[2023-04-01 10:31:51,128 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970849779]
[2023-04-01 10:31:51,128 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 10:31:51,129 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-04-01 10:31:51,129 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 10:31:51,129 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-04-01 10:31:51,129 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56
[2023-04-01 10:31:51,130 INFO  L87              Difference]: Start difference. First operand 1587 states and 2646 transitions. Second operand  has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3)
[2023-04-01 10:31:53,523 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 10:31:53,524 INFO  L93              Difference]: Finished difference Result 4838 states and 8235 transitions.
[2023-04-01 10:31:53,528 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2023-04-01 10:31:53,528 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 36
[2023-04-01 10:31:53,529 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 10:31:53,543 INFO  L225             Difference]: With dead ends: 4838
[2023-04-01 10:31:53,544 INFO  L226             Difference]: Without dead ends: 3256
[2023-04-01 10:31:53,547 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110
[2023-04-01 10:31:53,548 INFO  L413           NwaCegarLoop]: 21 mSDtfsCounter, 1612 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 2340 mSolverCounterSat, 1024 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1612 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 3364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1024 IncrementalHoareTripleChecker+Valid, 2340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time
[2023-04-01 10:31:53,548 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1612 Valid, 59 Invalid, 3364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1024 Valid, 2340 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time]
[2023-04-01 10:31:53,551 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 3256 states.
[2023-04-01 10:31:53,616 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 3256 to 2578.
[2023-04-01 10:31:53,621 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 2578 states, 2507 states have (on average 1.4547267650578382) internal successors, (3647), 2527 states have internal predecessors, (3647), 16 states have call successors, (16), 16 states have call predecessors, (16), 54 states have return successors, (188), 34 states have call predecessors, (188), 15 states have call successors, (188)
[2023-04-01 10:31:53,631 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2578 states to 2578 states and 3851 transitions.
[2023-04-01 10:31:53,632 INFO  L78                 Accepts]: Start accepts. Automaton has 2578 states and 3851 transitions. Word has length 36
[2023-04-01 10:31:53,632 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 10:31:53,632 INFO  L495      AbstractCegarLoop]: Abstraction has 2578 states and 3851 transitions.
[2023-04-01 10:31:53,632 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3)
[2023-04-01 10:31:53,632 INFO  L276                IsEmpty]: Start isEmpty. Operand 2578 states and 3851 transitions.
[2023-04-01 10:31:53,640 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 104
[2023-04-01 10:31:53,640 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 10:31:53,641 INFO  L195           NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:31:53,656 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2023-04-01 10:31:53,846 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-04-01 10:31:53,846 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 10:31:53,847 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 10:31:53,847 INFO  L85        PathProgramCache]: Analyzing trace with hash 11761078, now seen corresponding path program 1 times
[2023-04-01 10:31:53,847 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 10:31:53,847 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411523830]
[2023-04-01 10:31:53,847 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 10:31:53,848 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 10:31:53,883 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 10:31:54,081 INFO  L134       CoverageAnalysis]: Checked inductivity of 58 backedges. 31 proven. 14 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked.
[2023-04-01 10:31:54,082 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 10:31:54,082 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411523830]
[2023-04-01 10:31:54,082 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411523830] provided 0 perfect and 1 imperfect interpolant sequences
[2023-04-01 10:31:54,084 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928150301]
[2023-04-01 10:31:54,084 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 10:31:54,084 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-04-01 10:31:54,084 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-04-01 10:31:54,099 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-04-01 10:31:54,100 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2023-04-01 10:31:54,263 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 10:31:54,266 INFO  L262         TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 4 conjunts are in the unsatisfiable core
[2023-04-01 10:31:54,268 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-04-01 10:31:54,306 INFO  L134       CoverageAnalysis]: Checked inductivity of 58 backedges. 50 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2023-04-01 10:31:54,306 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-04-01 10:31:54,400 INFO  L134       CoverageAnalysis]: Checked inductivity of 58 backedges. 31 proven. 14 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked.
[2023-04-01 10:31:54,400 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928150301] provided 0 perfect and 2 imperfect interpolant sequences
[2023-04-01 10:31:54,400 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1246304877]
[2023-04-01 10:31:54,452 INFO  L159        IcfgInterpreter]: Started Sifa with 70 locations of interest
[2023-04-01 10:31:54,452 INFO  L166        IcfgInterpreter]: Building call graph
[2023-04-01 10:31:54,455 INFO  L171        IcfgInterpreter]: Initial procedures are [ULTIMATE.start]
[2023-04-01 10:31:54,458 INFO  L176        IcfgInterpreter]: Starting interpretation
[2023-04-01 10:31:54,459 INFO  L197        IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs
[2023-04-01 10:31:54,688 INFO  L197        IcfgInterpreter]: Interpreting procedure main with input of size 76 for LOIs
[2023-04-01 10:31:54,890 WARN  L137   XnfTransformerHelper]: expecting exponential blowup for input size 43
[2023-04-01 10:31:57,353 WARN  L137   XnfTransformerHelper]: expecting exponential blowup for input size 18
[2023-04-01 10:32:00,609 WARN  L176   XnfTransformerHelper]: Simplifying disjunction of 276864 conjuctions. This might take some time...