/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/nla-digbench-scaling/ps5-ll_valuebound50.c


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


This is Ultimate 0.2.3-dev-f954360
[2023-03-31 23:29:08,792 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2023-03-31 23:29:08,794 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
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[2023-03-31 23:29:08,831 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2023-03-31 23:29:08,834 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2023-03-31 23:29:08,836 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2023-03-31 23:29:08,839 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
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[2023-03-31 23:29:08,846 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
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[2023-03-31 23:29:08,847 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
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[2023-03-31 23:29:08,851 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2023-03-31 23:29:08,852 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2023-03-31 23:29:08,853 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
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[2023-03-31 23:29:08,874 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
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[2023-03-31 23:29:08,878 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2023-03-31 23:29:08,880 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2023-03-31 23:29:08,881 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
[2023-03-31 23:29:08,910 INFO  L113        SettingsManager]: Loading preferences was successful
[2023-03-31 23:29:08,910 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2023-03-31 23:29:08,911 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-03-31 23:29:08,911 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-03-31 23:29:08,911 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-03-31 23:29:08,912 INFO  L138        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-03-31 23:29:08,912 INFO  L138        SettingsManager]:  * User list type=DISABLED
[2023-03-31 23:29:08,912 INFO  L136        SettingsManager]: Preferences of Abstract Interpretation differ from their defaults:
[2023-03-31 23:29:08,912 INFO  L138        SettingsManager]:  * Explicit value domain=true
[2023-03-31 23:29:08,912 INFO  L138        SettingsManager]:  * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain
[2023-03-31 23:29:08,913 INFO  L138        SettingsManager]:  * Octagon Domain=false
[2023-03-31 23:29:08,913 INFO  L138        SettingsManager]:  * Abstract domain=CompoundDomain
[2023-03-31 23:29:08,913 INFO  L138        SettingsManager]:  * Check feasibility of abstract posts with an SMT solver=true
[2023-03-31 23:29:08,913 INFO  L138        SettingsManager]:  * Use the RCFG-of-the-future interface=true
[2023-03-31 23:29:08,913 INFO  L138        SettingsManager]:  * Interval Domain=false
[2023-03-31 23:29:08,913 INFO  L136        SettingsManager]: Preferences of Sifa differ from their defaults:
[2023-03-31 23:29:08,913 INFO  L138        SettingsManager]:  * Call Summarizer=TopInputCallSummarizer
[2023-03-31 23:29:08,914 INFO  L138        SettingsManager]:  * Simplification Technique=POLY_PAC
[2023-03-31 23:29:08,914 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-03-31 23:29:08,914 INFO  L138        SettingsManager]:  * sizeof long=4
[2023-03-31 23:29:08,915 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-03-31 23:29:08,915 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2023-03-31 23:29:08,915 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2023-03-31 23:29:08,915 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-03-31 23:29:08,915 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-03-31 23:29:08,916 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-03-31 23:29:08,916 INFO  L138        SettingsManager]:  * sizeof long double=12
[2023-03-31 23:29:08,916 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2023-03-31 23:29:08,916 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2023-03-31 23:29:08,916 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-03-31 23:29:08,916 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-03-31 23:29:08,916 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-03-31 23:29:08,917 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-03-31 23:29:08,917 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-03-31 23:29:08,917 INFO  L138        SettingsManager]:  * Abstract interpretation Mode=USE_PREDICATES
[2023-03-31 23:29:08,917 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-03-31 23:29:08,917 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2023-03-31 23:29:08,917 INFO  L138        SettingsManager]:  * Trace refinement strategy=SIFA_TAIPAN
[2023-03-31 23:29:08,917 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-03-31 23:29:08,917 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-03-31 23:29:08,918 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2023-03-31 23:29:08,918 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain
[2023-03-31 23:29:09,148 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-03-31 23:29:09,167 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-03-31 23:29:09,169 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-03-31 23:29:09,171 INFO  L271        PluginConnector]: Initializing CDTParser...
[2023-03-31 23:29:09,171 INFO  L275        PluginConnector]: CDTParser initialized
[2023-03-31 23:29:09,172 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_valuebound50.c
[2023-03-31 23:29:10,321 INFO  L500              CDTParser]: Created temporary CDT project at NULL
[2023-03-31 23:29:10,526 INFO  L351              CDTParser]: Found 1 translation units.
[2023-03-31 23:29:10,526 INFO  L172              CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_valuebound50.c
[2023-03-31 23:29:10,532 INFO  L394              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/03d24d142/c3c9f424c264407396b5c4958f7e7f82/FLAG7cbbd6438
[2023-03-31 23:29:10,546 INFO  L402              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/03d24d142/c3c9f424c264407396b5c4958f7e7f82
[2023-03-31 23:29:10,548 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-03-31 23:29:10,550 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2023-03-31 23:29:10,553 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-03-31 23:29:10,553 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-03-31 23:29:10,557 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-03-31 23:29:10,558 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 11:29:10" (1/1) ...
[2023-03-31 23:29:10,559 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4854e79b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:29:10, skipping insertion in model container
[2023-03-31 23:29:10,559 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 11:29:10" (1/1) ...
[2023-03-31 23:29:10,565 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2023-03-31 23:29:10,578 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2023-03-31 23:29:10,701 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/nla-digbench-scaling/ps5-ll_valuebound50.c[458,471]
[2023-03-31 23:29:10,724 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-03-31 23:29:10,734 INFO  L203         MainTranslator]: Completed pre-run
[2023-03-31 23:29:10,745 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/nla-digbench-scaling/ps5-ll_valuebound50.c[458,471]
[2023-03-31 23:29:10,757 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-03-31 23:29:10,766 INFO  L208         MainTranslator]: Completed translation
[2023-03-31 23:29:10,767 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:29:10 WrapperNode
[2023-03-31 23:29:10,767 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-03-31 23:29:10,768 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-03-31 23:29:10,768 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2023-03-31 23:29:10,768 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2023-03-31 23:29:10,777 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:29:10" (1/1) ...
[2023-03-31 23:29:10,778 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:29:10" (1/1) ...
[2023-03-31 23:29:10,782 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:29:10" (1/1) ...
[2023-03-31 23:29:10,782 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:29:10" (1/1) ...
[2023-03-31 23:29:10,786 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:29:10" (1/1) ...
[2023-03-31 23:29:10,789 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:29:10" (1/1) ...
[2023-03-31 23:29:10,789 INFO  L185        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:29:10" (1/1) ...
[2023-03-31 23:29:10,790 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:29:10" (1/1) ...
[2023-03-31 23:29:10,791 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-03-31 23:29:10,792 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-03-31 23:29:10,792 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2023-03-31 23:29:10,792 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2023-03-31 23:29:10,793 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:29:10" (1/1) ...
[2023-03-31 23:29:10,798 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-03-31 23:29:10,807 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-03-31 23:29:10,822 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)
[2023-03-31 23:29:10,826 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
[2023-03-31 23:29:10,857 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2023-03-31 23:29:10,858 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-03-31 23:29:10,858 INFO  L138     BoogieDeclarations]: Found implementation of procedure reach_error
[2023-03-31 23:29:10,858 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2023-03-31 23:29:10,858 INFO  L138     BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2023-03-31 23:29:10,858 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2023-03-31 23:29:10,858 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2023-03-31 23:29:10,858 INFO  L130     BoogieDeclarations]: Found specification of procedure __assert_fail
[2023-03-31 23:29:10,858 INFO  L130     BoogieDeclarations]: Found specification of procedure reach_error
[2023-03-31 23:29:10,859 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-03-31 23:29:10,859 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short
[2023-03-31 23:29:10,859 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2023-03-31 23:29:10,859 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2023-03-31 23:29:10,859 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2023-03-31 23:29:10,859 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2023-03-31 23:29:10,859 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2023-03-31 23:29:10,859 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-03-31 23:29:10,859 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2023-03-31 23:29:10,860 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2023-03-31 23:29:10,860 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2023-03-31 23:29:10,914 INFO  L236             CfgBuilder]: Building ICFG
[2023-03-31 23:29:10,916 INFO  L262             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-03-31 23:29:11,085 INFO  L277             CfgBuilder]: Performing block encoding
[2023-03-31 23:29:11,105 INFO  L297             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-03-31 23:29:11,106 INFO  L302             CfgBuilder]: Removed 1 assume(true) statements.
[2023-03-31 23:29:11,108 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 11:29:11 BoogieIcfgContainer
[2023-03-31 23:29:11,108 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-03-31 23:29:11,110 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-03-31 23:29:11,110 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2023-03-31 23:29:11,113 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2023-03-31 23:29:11,113 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 11:29:10" (1/3) ...
[2023-03-31 23:29:11,114 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@493181be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 11:29:11, skipping insertion in model container
[2023-03-31 23:29:11,114 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:29:10" (2/3) ...
[2023-03-31 23:29:11,114 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@493181be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 11:29:11, skipping insertion in model container
[2023-03-31 23:29:11,114 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 11:29:11" (3/3) ...
[2023-03-31 23:29:11,115 INFO  L112   eAbstractionObserver]: Analyzing ICFG ps5-ll_valuebound50.c
[2023-03-31 23:29:11,130 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-03-31 23:29:11,131 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-03-31 23:29:11,171 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-03-31 23:29:11,176 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;@18cf2e4e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2023-03-31 23:29:11,176 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-03-31 23:29:11,180 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 25 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7)
[2023-03-31 23:29:11,192 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 18
[2023-03-31 23:29:11,193 INFO  L187           NwaCegarLoop]: Found error trace
[2023-03-31 23:29:11,193 INFO  L195           NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-03-31 23:29:11,194 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-03-31 23:29:11,198 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-03-31 23:29:11,198 INFO  L85        PathProgramCache]: Analyzing trace with hash 395619074, now seen corresponding path program 1 times
[2023-03-31 23:29:11,212 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-03-31 23:29:11,212 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739327558]
[2023-03-31 23:29:11,213 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-03-31 23:29:11,213 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-03-31 23:29:11,311 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-03-31 23:29:11,312 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2135313957]
[2023-03-31 23:29:11,312 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-03-31 23:29:11,312 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-03-31 23:29:11,313 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-03-31 23:29:11,321 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)
[2023-03-31 23:29:11,326 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2023-03-31 23:29:11,383 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-03-31 23:29:11,385 INFO  L262         TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core
[2023-03-31 23:29:11,392 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-03-31 23:29:11,489 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2023-03-31 23:29:11,490 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-03-31 23:29:11,490 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-03-31 23:29:11,490 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739327558]
[2023-03-31 23:29:11,490 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-03-31 23:29:11,490 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135313957]
[2023-03-31 23:29:11,491 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135313957] provided 1 perfect and 0 imperfect interpolant sequences
[2023-03-31 23:29:11,491 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-03-31 23:29:11,491 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2023-03-31 23:29:11,493 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240057076]
[2023-03-31 23:29:11,494 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-03-31 23:29:11,497 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2023-03-31 23:29:11,498 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-03-31 23:29:11,519 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2023-03-31 23:29:11,520 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2023-03-31 23:29:11,522 INFO  L87              Difference]: Start difference. First operand  has 25 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand  has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3)
[2023-03-31 23:29:11,626 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-03-31 23:29:11,627 INFO  L93              Difference]: Finished difference Result 51 states and 71 transitions.
[2023-03-31 23:29:11,628 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-03-31 23:29:11,629 INFO  L78                 Accepts]: Start accepts. Automaton has  has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 17
[2023-03-31 23:29:11,630 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-03-31 23:29:11,635 INFO  L225             Difference]: With dead ends: 51
[2023-03-31 23:29:11,636 INFO  L226             Difference]: Without dead ends: 28
[2023-03-31 23:29:11,638 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42
[2023-03-31 23:29:11,641 INFO  L413           NwaCegarLoop]: 17 mSDtfsCounter, 7 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-03-31 23:29:11,642 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 72 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-03-31 23:29:11,656 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 28 states.
[2023-03-31 23:29:11,675 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28.
[2023-03-31 23:29:11,676 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 28 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6)
[2023-03-31 23:29:11,679 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions.
[2023-03-31 23:29:11,680 INFO  L78                 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 17
[2023-03-31 23:29:11,681 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-03-31 23:29:11,681 INFO  L495      AbstractCegarLoop]: Abstraction has 28 states and 31 transitions.
[2023-03-31 23:29:11,682 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3)
[2023-03-31 23:29:11,682 INFO  L276                IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions.
[2023-03-31 23:29:11,683 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 25
[2023-03-31 23:29:11,683 INFO  L187           NwaCegarLoop]: Found error trace
[2023-03-31 23:29:11,683 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]
[2023-03-31 23:29:11,692 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0
[2023-03-31 23:29:11,889 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0
[2023-03-31 23:29:11,889 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-03-31 23:29:11,890 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-03-31 23:29:11,890 INFO  L85        PathProgramCache]: Analyzing trace with hash 398349892, now seen corresponding path program 1 times
[2023-03-31 23:29:11,891 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-03-31 23:29:11,891 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865925949]
[2023-03-31 23:29:11,891 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-03-31 23:29:11,891 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-03-31 23:29:11,922 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-03-31 23:29:11,922 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [221020059]
[2023-03-31 23:29:11,923 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-03-31 23:29:11,923 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-03-31 23:29:11,923 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-03-31 23:29:11,927 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)
[2023-03-31 23:29:11,931 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2023-03-31 23:29:11,989 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-03-31 23:29:11,991 INFO  L262         TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-03-31 23:29:11,995 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-03-31 23:29:12,130 INFO  L134       CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2023-03-31 23:29:12,130 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-03-31 23:29:12,298 INFO  L134       CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2023-03-31 23:29:12,301 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-03-31 23:29:12,301 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865925949]
[2023-03-31 23:29:12,306 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-03-31 23:29:12,307 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221020059]
[2023-03-31 23:29:12,307 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [221020059] provided 0 perfect and 2 imperfect interpolant sequences
[2023-03-31 23:29:12,307 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [488163862]
[2023-03-31 23:29:12,332 INFO  L159        IcfgInterpreter]: Started Sifa with 19 locations of interest
[2023-03-31 23:29:12,332 INFO  L166        IcfgInterpreter]: Building call graph
[2023-03-31 23:29:12,335 INFO  L171        IcfgInterpreter]: Initial procedures are [ULTIMATE.start]
[2023-03-31 23:29:12,339 INFO  L176        IcfgInterpreter]: Starting interpretation
[2023-03-31 23:29:12,340 INFO  L197        IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs
[2023-03-31 23:29:12,399 INFO  L197        IcfgInterpreter]: Interpreting procedure main with input of size 8 for LOIs
[2023-03-31 23:29:12,673 INFO  L197        IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 49 for LOIs
[2023-03-31 23:29:12,784 INFO  L197        IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 13 for LOIs
[2023-03-31 23:29:12,789 INFO  L197        IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs
[2023-03-31 23:29:12,794 INFO  L180        IcfgInterpreter]: Interpretation finished
[2023-03-31 23:29:14,748 INFO  L133             SifaRunner]: Sifa could not show that error location is unreachable, found '352#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((v_main_~x~0_BEFORE_CALL_11 Int) (v_main_~y~0_BEFORE_CALL_11 Int) (v_main_~c~0_BEFORE_CALL_7 Int) (v_main_~k~0_BEFORE_CALL_11 Int)) (and (not (= (+ v_main_~y~0_BEFORE_CALL_11 (* 30 v_main_~x~0_BEFORE_CALL_11)) (+ (* 15 (* v_main_~y~0_BEFORE_CALL_11 v_main_~y~0_BEFORE_CALL_11 v_main_~y~0_BEFORE_CALL_11 v_main_~y~0_BEFORE_CALL_11)) (* (* v_main_~y~0_BEFORE_CALL_11 v_main_~y~0_BEFORE_CALL_11 v_main_~y~0_BEFORE_CALL_11 v_main_~y~0_BEFORE_CALL_11 v_main_~y~0_BEFORE_CALL_11) 6) (* (* v_main_~y~0_BEFORE_CALL_11 v_main_~y~0_BEFORE_CALL_11 v_main_~y~0_BEFORE_CALL_11) 10)))) (or (and (<= 1 v_main_~y~0_BEFORE_CALL_11) (<= v_main_~k~0_BEFORE_CALL_11 50) (<= 1 v_main_~x~0_BEFORE_CALL_11) (<= 0 v_main_~k~0_BEFORE_CALL_11) (= |#NULL.offset| 0) (<= v_main_~c~0_BEFORE_CALL_7 51) (<= 1 v_main_~c~0_BEFORE_CALL_7) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0)) (and (= v_main_~y~0_BEFORE_CALL_11 0) (= v_main_~x~0_BEFORE_CALL_11 0) (<= v_main_~k~0_BEFORE_CALL_11 50) (<= 0 v_main_~k~0_BEFORE_CALL_11) (= v_main_~c~0_BEFORE_CALL_7 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))))))' at error location
[2023-03-31 23:29:14,749 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED
[2023-03-31 23:29:14,749 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2023-03-31 23:29:14,749 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11
[2023-03-31 23:29:14,749 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885181595]
[2023-03-31 23:29:14,749 INFO  L85    oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2023-03-31 23:29:14,750 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 11 states
[2023-03-31 23:29:14,750 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-03-31 23:29:14,751 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2023-03-31 23:29:14,751 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506
[2023-03-31 23:29:14,751 INFO  L87              Difference]: Start difference. First operand 28 states and 31 transitions. Second operand  has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5)
[2023-03-31 23:29:14,868 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-03-31 23:29:14,869 INFO  L93              Difference]: Finished difference Result 39 states and 44 transitions.
[2023-03-31 23:29:14,869 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-03-31 23:29:14,869 INFO  L78                 Accepts]: Start accepts. Automaton has  has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 24
[2023-03-31 23:29:14,869 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-03-31 23:29:14,870 INFO  L225             Difference]: With dead ends: 39
[2023-03-31 23:29:14,870 INFO  L226             Difference]: Without dead ends: 35
[2023-03-31 23:29:14,871 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600
[2023-03-31 23:29:14,872 INFO  L413           NwaCegarLoop]: 18 mSDtfsCounter, 16 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-03-31 23:29:14,872 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 90 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-03-31 23:29:14,873 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 35 states.
[2023-03-31 23:29:14,879 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30.
[2023-03-31 23:29:14,879 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 30 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 17 states have internal predecessors, (18), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6)
[2023-03-31 23:29:14,880 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions.
[2023-03-31 23:29:14,880 INFO  L78                 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 24
[2023-03-31 23:29:14,880 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-03-31 23:29:14,881 INFO  L495      AbstractCegarLoop]: Abstraction has 30 states and 32 transitions.
[2023-03-31 23:29:14,881 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5)
[2023-03-31 23:29:14,881 INFO  L276                IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions.
[2023-03-31 23:29:14,882 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 36
[2023-03-31 23:29:14,882 INFO  L187           NwaCegarLoop]: Found error trace
[2023-03-31 23:29:14,882 INFO  L195           NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-03-31 23:29:14,891 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0
[2023-03-31 23:29:15,087 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1
[2023-03-31 23:29:15,087 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-03-31 23:29:15,088 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-03-31 23:29:15,088 INFO  L85        PathProgramCache]: Analyzing trace with hash 2024645172, now seen corresponding path program 1 times
[2023-03-31 23:29:15,088 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-03-31 23:29:15,088 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050389137]
[2023-03-31 23:29:15,088 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-03-31 23:29:15,088 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-03-31 23:29:15,099 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-03-31 23:29:15,100 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2039526109]
[2023-03-31 23:29:15,100 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-03-31 23:29:15,100 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-03-31 23:29:15,100 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-03-31 23:29:15,101 INFO  L229       MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-03-31 23:29:15,128 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2023-03-31 23:29:15,155 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-03-31 23:29:15,156 INFO  L262         TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 20 conjunts are in the unsatisfiable core
[2023-03-31 23:29:15,161 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-03-31 23:29:15,280 INFO  L134       CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked.
[2023-03-31 23:29:15,280 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-03-31 23:29:19,361 WARN  L839   $PredicateComparison]: unable to prove that (or (not (= (mod (+ (* 15 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 29 c_main_~y~0) (* 10 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 6 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0)) 30) 0)) (= (* c_main_~y~0 c_main_~k~0) (* c_main_~y~0 c_main_~y~0))) is different from false
[2023-03-31 23:29:39,457 WARN  L861   $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((v_main_~k~0_BEFORE_CALL_17 Int) (v_main_~y~0_BEFORE_CALL_16 Int)) (or (= (mod (+ (* v_main_~y~0_BEFORE_CALL_16 v_main_~y~0_BEFORE_CALL_16 v_main_~y~0_BEFORE_CALL_16 v_main_~y~0_BEFORE_CALL_16 15) (* v_main_~y~0_BEFORE_CALL_16 v_main_~y~0_BEFORE_CALL_16 v_main_~y~0_BEFORE_CALL_16 v_main_~y~0_BEFORE_CALL_16 v_main_~y~0_BEFORE_CALL_16 6) (* 29 v_main_~y~0_BEFORE_CALL_16) (* v_main_~y~0_BEFORE_CALL_16 v_main_~y~0_BEFORE_CALL_16 v_main_~y~0_BEFORE_CALL_16 10)) 30) 0) (= (* v_main_~y~0_BEFORE_CALL_16 v_main_~y~0_BEFORE_CALL_16) (* v_main_~y~0_BEFORE_CALL_16 v_main_~k~0_BEFORE_CALL_17))))) is different from true
[2023-03-31 23:29:57,523 WARN  L861   $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((v_main_~k~0_BEFORE_CALL_17 Int) (v_main_~y~0_BEFORE_CALL_16 Int)) (or (= (mod (+ (* v_main_~y~0_BEFORE_CALL_16 v_main_~y~0_BEFORE_CALL_16 v_main_~y~0_BEFORE_CALL_16 v_main_~y~0_BEFORE_CALL_16 15) (* v_main_~y~0_BEFORE_CALL_16 v_main_~y~0_BEFORE_CALL_16 v_main_~y~0_BEFORE_CALL_16 v_main_~y~0_BEFORE_CALL_16 v_main_~y~0_BEFORE_CALL_16 6) (* 29 v_main_~y~0_BEFORE_CALL_16) (* v_main_~y~0_BEFORE_CALL_16 v_main_~y~0_BEFORE_CALL_16 v_main_~y~0_BEFORE_CALL_16 10)) 30) 0) (= (* v_main_~y~0_BEFORE_CALL_16 v_main_~y~0_BEFORE_CALL_16) (* v_main_~y~0_BEFORE_CALL_16 v_main_~k~0_BEFORE_CALL_17)))) (= c___VERIFIER_assert_~cond 0)) is different from true
[2023-03-31 23:30:19,537 WARN  L839   $PredicateComparison]: unable to prove that (or (not (= (mod (+ (* 15 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 29 c_main_~y~0) (* 10 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 6 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0)) 30) 0)) (forall ((main_~k~0 Int)) (or (< (+ c_main_~c~0 1) main_~k~0) (<= main_~k~0 c_main_~c~0) (= (+ (* main_~k~0 c_main_~y~0) main_~k~0) (+ (* 2 c_main_~y~0) (* c_main_~y~0 c_main_~y~0) 1))))) is different from false
[2023-03-31 23:30:22,236 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-03-31 23:30:22,237 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050389137]
[2023-03-31 23:30:22,237 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-03-31 23:30:22,237 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039526109]
[2023-03-31 23:30:22,237 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039526109] provided 0 perfect and 1 imperfect interpolant sequences
[2023-03-31 23:30:22,237 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1389799792]
[2023-03-31 23:30:22,240 INFO  L159        IcfgInterpreter]: Started Sifa with 21 locations of interest
[2023-03-31 23:30:22,240 INFO  L166        IcfgInterpreter]: Building call graph
[2023-03-31 23:30:22,240 INFO  L171        IcfgInterpreter]: Initial procedures are [ULTIMATE.start]
[2023-03-31 23:30:22,240 INFO  L176        IcfgInterpreter]: Starting interpretation
[2023-03-31 23:30:22,240 INFO  L197        IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs
[2023-03-31 23:30:22,257 INFO  L197        IcfgInterpreter]: Interpreting procedure main with input of size 8 for LOIs
[2023-03-31 23:30:22,437 INFO  L197        IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs
[2023-03-31 23:30:22,440 INFO  L197        IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 13 for LOIs
[2023-03-31 23:30:22,443 INFO  L197        IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs
[2023-03-31 23:30:22,447 INFO  L180        IcfgInterpreter]: Interpretation finished
[2023-03-31 23:30:22,797 INFO  L133             SifaRunner]: Sifa could not show that error location is unreachable, found '645#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location
[2023-03-31 23:30:22,797 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED
[2023-03-31 23:30:22,797 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences.
[2023-03-31 23:30:22,797 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9
[2023-03-31 23:30:22,798 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428488117]
[2023-03-31 23:30:22,798 INFO  L85    oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton
[2023-03-31 23:30:22,798 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 9 states
[2023-03-31 23:30:22,798 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-03-31 23:30:22,799 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2023-03-31 23:30:22,799 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=436, Unknown=7, NotChecked=180, Total=702
[2023-03-31 23:30:22,799 INFO  L87              Difference]: Start difference. First operand 30 states and 32 transitions. Second operand  has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6)
[2023-03-31 23:30:22,923 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-03-31 23:30:22,923 INFO  L93              Difference]: Finished difference Result 39 states and 43 transitions.
[2023-03-31 23:30:22,923 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-03-31 23:30:22,923 INFO  L78                 Accepts]: Start accepts. Automaton has  has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 35
[2023-03-31 23:30:22,924 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-03-31 23:30:22,924 INFO  L225             Difference]: With dead ends: 39
[2023-03-31 23:30:22,924 INFO  L226             Difference]: Without dead ends: 33
[2023-03-31 23:30:22,925 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 60 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 19.2s TimeCoverageRelationStatistics Valid=93, Invalid=516, Unknown=7, NotChecked=196, Total=812
[2023-03-31 23:30:22,926 INFO  L413           NwaCegarLoop]: 18 mSDtfsCounter, 6 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-03-31 23:30:22,926 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 97 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-03-31 23:30:22,927 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 33 states.
[2023-03-31 23:30:22,932 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33.
[2023-03-31 23:30:22,933 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 33 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 19 states have internal predecessors, (20), 9 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7)
[2023-03-31 23:30:22,933 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions.
[2023-03-31 23:30:22,933 INFO  L78                 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 35
[2023-03-31 23:30:22,934 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-03-31 23:30:22,934 INFO  L495      AbstractCegarLoop]: Abstraction has 33 states and 36 transitions.
[2023-03-31 23:30:22,934 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6)
[2023-03-31 23:30:22,934 INFO  L276                IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions.
[2023-03-31 23:30:22,935 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 43
[2023-03-31 23:30:22,935 INFO  L187           NwaCegarLoop]: Found error trace
[2023-03-31 23:30:22,935 INFO  L195           NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-03-31 23:30:22,946 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0
[2023-03-31 23:30:23,137 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-03-31 23:30:23,137 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-03-31 23:30:23,137 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-03-31 23:30:23,138 INFO  L85        PathProgramCache]: Analyzing trace with hash -170934026, now seen corresponding path program 2 times
[2023-03-31 23:30:23,138 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-03-31 23:30:23,138 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879318511]
[2023-03-31 23:30:23,138 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-03-31 23:30:23,138 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-03-31 23:30:23,151 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-03-31 23:30:23,151 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2088980325]
[2023-03-31 23:30:23,151 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2023-03-31 23:30:23,151 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-03-31 23:30:23,152 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-03-31 23:30:23,153 INFO  L229       MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-03-31 23:30:23,155 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2023-03-31 23:30:23,225 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s)
[2023-03-31 23:30:23,225 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2023-03-31 23:30:23,226 INFO  L262         TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 24 conjunts are in the unsatisfiable core
[2023-03-31 23:30:23,228 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-03-31 23:30:23,354 INFO  L134       CoverageAnalysis]: Checked inductivity of 43 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked.
[2023-03-31 23:30:23,354 INFO  L327         TraceCheckSpWp]: Computing backward predicates...