/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_unwindbound5.c


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


This is Ultimate 0.2.2-dev-05ce600
[2022-02-24 04:14:25,666 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2022-02-24 04:14:25,668 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2022-02-24 04:14:25,699 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2022-02-24 04:14:25,699 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2022-02-24 04:14:25,700 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2022-02-24 04:14:25,701 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2022-02-24 04:14:25,702 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2022-02-24 04:14:25,715 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2022-02-24 04:14:25,719 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2022-02-24 04:14:25,720 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2022-02-24 04:14:25,722 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2022-02-24 04:14:25,723 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2022-02-24 04:14:25,725 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2022-02-24 04:14:25,726 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2022-02-24 04:14:25,728 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2022-02-24 04:14:25,729 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2022-02-24 04:14:25,729 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2022-02-24 04:14:25,744 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2022-02-24 04:14:25,745 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2022-02-24 04:14:25,746 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2022-02-24 04:14:25,746 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2022-02-24 04:14:25,747 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2022-02-24 04:14:25,748 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2022-02-24 04:14:25,756 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2022-02-24 04:14:25,756 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2022-02-24 04:14:25,756 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2022-02-24 04:14:25,757 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2022-02-24 04:14:25,757 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2022-02-24 04:14:25,758 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2022-02-24 04:14:25,758 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2022-02-24 04:14:25,759 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2022-02-24 04:14:25,760 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2022-02-24 04:14:25,760 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2022-02-24 04:14:25,761 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2022-02-24 04:14:25,761 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2022-02-24 04:14:25,762 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2022-02-24 04:14:25,762 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2022-02-24 04:14:25,762 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2022-02-24 04:14:25,763 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2022-02-24 04:14:25,763 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf
[2022-02-24 04:14:25,773 INFO  L113        SettingsManager]: Loading preferences was successful
[2022-02-24 04:14:25,773 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2022-02-24 04:14:25,775 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2022-02-24 04:14:25,775 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2022-02-24 04:14:25,775 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2022-02-24 04:14:25,775 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2022-02-24 04:14:25,775 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2022-02-24 04:14:25,775 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2022-02-24 04:14:25,775 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2022-02-24 04:14:25,775 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2022-02-24 04:14:25,776 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2022-02-24 04:14:25,776 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2022-02-24 04:14:25,776 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2022-02-24 04:14:25,776 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2022-02-24 04:14:25,776 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2022-02-24 04:14:25,776 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-02-24 04:14:25,776 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2022-02-24 04:14:25,776 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=AcceleratedInterpolation
[2022-02-24 04:14:25,776 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2022-02-24 04:14:25,777 INFO  L138        SettingsManager]:  * Loop acceleration method that is used by accelerated interpolation=QVASR
[2022-02-24 04:14:25,777 INFO  L138        SettingsManager]:  * Use separate solver for trace checks=false
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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN;
[2022-02-24 04:14:25,958 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2022-02-24 04:14:25,980 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2022-02-24 04:14:25,982 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2022-02-24 04:14:25,984 INFO  L271        PluginConnector]: Initializing CDTParser...
[2022-02-24 04:14:25,984 INFO  L275        PluginConnector]: CDTParser initialized
[2022-02-24 04:14:25,985 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_unwindbound5.c
[2022-02-24 04:14:26,067 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7c8f8336/c7fc1f2c3a28490f924c3f3361858189/FLAG67f90008d
[2022-02-24 04:14:26,374 INFO  L306              CDTParser]: Found 1 translation units.
[2022-02-24 04:14:26,374 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_unwindbound5.c
[2022-02-24 04:14:26,378 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7c8f8336/c7fc1f2c3a28490f924c3f3361858189/FLAG67f90008d
[2022-02-24 04:14:26,826 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7c8f8336/c7fc1f2c3a28490f924c3f3361858189
[2022-02-24 04:14:26,829 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2022-02-24 04:14:26,830 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2022-02-24 04:14:26,834 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2022-02-24 04:14:26,834 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2022-02-24 04:14:26,837 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2022-02-24 04:14:26,837 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:14:26" (1/1) ...
[2022-02-24 04:14:26,838 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@315d9918 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:14:26, skipping insertion in model container
[2022-02-24 04:14:26,838 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:14:26" (1/1) ...
[2022-02-24 04:14:26,843 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2022-02-24 04:14:26,857 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2022-02-24 04:14:26,997 WARN  L230   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_unwindbound5.c[458,471]
[2022-02-24 04:14:27,025 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-02-24 04:14:27,033 INFO  L203         MainTranslator]: Completed pre-run
[2022-02-24 04:14:27,046 WARN  L230   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_unwindbound5.c[458,471]
[2022-02-24 04:14:27,052 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-02-24 04:14:27,065 INFO  L208         MainTranslator]: Completed translation
[2022-02-24 04:14:27,066 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:14:27 WrapperNode
[2022-02-24 04:14:27,066 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2022-02-24 04:14:27,067 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2022-02-24 04:14:27,067 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2022-02-24 04:14:27,067 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2022-02-24 04:14:27,078 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:14:27" (1/1) ...
[2022-02-24 04:14:27,079 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:14:27" (1/1) ...
[2022-02-24 04:14:27,086 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:14:27" (1/1) ...
[2022-02-24 04:14:27,086 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:14:27" (1/1) ...
[2022-02-24 04:14:27,091 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:14:27" (1/1) ...
[2022-02-24 04:14:27,095 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:14:27" (1/1) ...
[2022-02-24 04:14:27,096 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:14:27" (1/1) ...
[2022-02-24 04:14:27,098 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2022-02-24 04:14:27,099 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2022-02-24 04:14:27,099 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2022-02-24 04:14:27,099 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2022-02-24 04:14:27,101 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:14:27" (1/1) ...
[2022-02-24 04:14:27,108 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-02-24 04:14:27,130 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-02-24 04:14:27,157 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)
[2022-02-24 04:14:27,168 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
[2022-02-24 04:14:27,213 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2022-02-24 04:14:27,214 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2022-02-24 04:14:27,214 INFO  L138     BoogieDeclarations]: Found implementation of procedure reach_error
[2022-02-24 04:14:27,214 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2022-02-24 04:14:27,215 INFO  L138     BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2022-02-24 04:14:27,215 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2022-02-24 04:14:27,215 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2022-02-24 04:14:27,215 INFO  L130     BoogieDeclarations]: Found specification of procedure __assert_fail
[2022-02-24 04:14:27,216 INFO  L130     BoogieDeclarations]: Found specification of procedure reach_error
[2022-02-24 04:14:27,216 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2022-02-24 04:14:27,216 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short
[2022-02-24 04:14:27,216 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2022-02-24 04:14:27,216 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2022-02-24 04:14:27,217 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2022-02-24 04:14:27,217 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2022-02-24 04:14:27,217 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2022-02-24 04:14:27,217 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2022-02-24 04:14:27,218 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2022-02-24 04:14:27,224 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2022-02-24 04:14:27,224 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2022-02-24 04:14:27,278 INFO  L234             CfgBuilder]: Building ICFG
[2022-02-24 04:14:27,279 INFO  L260             CfgBuilder]: Building CFG for each procedure with an implementation
[2022-02-24 04:14:27,382 INFO  L275             CfgBuilder]: Performing block encoding
[2022-02-24 04:14:27,387 INFO  L294             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2022-02-24 04:14:27,387 INFO  L299             CfgBuilder]: Removed 1 assume(true) statements.
[2022-02-24 04:14:27,392 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:14:27 BoogieIcfgContainer
[2022-02-24 04:14:27,392 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2022-02-24 04:14:27,393 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2022-02-24 04:14:27,393 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2022-02-24 04:14:27,396 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2022-02-24 04:14:27,396 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 04:14:26" (1/3) ...
[2022-02-24 04:14:27,401 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2247a2d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:14:27, skipping insertion in model container
[2022-02-24 04:14:27,401 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:14:27" (2/3) ...
[2022-02-24 04:14:27,402 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2247a2d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:14:27, skipping insertion in model container
[2022-02-24 04:14:27,402 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:14:27" (3/3) ...
[2022-02-24 04:14:27,412 INFO  L111   eAbstractionObserver]: Analyzing ICFG ps4-ll_unwindbound5.c
[2022-02-24 04:14:27,416 INFO  L205   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION
[2022-02-24 04:14:27,417 INFO  L164   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2022-02-24 04:14:27,467 INFO  L338      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2022-02-24 04:14:27,475 INFO  L339      AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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, mLoopAccelerationTechnique=QVASR
[2022-02-24 04:14:27,475 INFO  L340      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2022-02-24 04:14:27,486 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 23 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5)
[2022-02-24 04:14:27,492 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 12
[2022-02-24 04:14:27,492 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-24 04:14:27,493 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-24 04:14:27,493 INFO  L402      AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-24 04:14:27,498 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-24 04:14:27,498 INFO  L85        PathProgramCache]: Analyzing trace with hash -2133548928, now seen corresponding path program 1 times
[2022-02-24 04:14:27,503 INFO  L126   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-24 04:14:27,504 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [741465024]
[2022-02-24 04:14:27,504 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-24 04:14:27,513 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-24 04:14:27,544 INFO  L213   tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2022-02-24 04:14:27,570 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-24 04:14:27,610 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-02-24 04:14:27,613 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-02-24 04:14:27,620 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-02-24 04:14:27,621 INFO  L144   FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-02-24 04:14:27,621 INFO  L338   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [741465024]
[2022-02-24 04:14:27,622 INFO  L165   FreeRefinementEngine]: IpTcStrategyModulePreferences [741465024] provided 1 perfect and 0 imperfect interpolant sequences
[2022-02-24 04:14:27,622 INFO  L191   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-02-24 04:14:27,623 INFO  L204   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2022-02-24 04:14:27,623 INFO  L118   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241107315]
[2022-02-24 04:14:27,624 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-02-24 04:14:27,627 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-02-24 04:14:27,627 INFO  L108   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-02-24 04:14:27,646 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-02-24 04:14:27,647 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-02-24 04:14:27,648 INFO  L87              Difference]: Start difference. First operand  has 23 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 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), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2022-02-24 04:14:27,694 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-02-24 04:14:27,695 INFO  L93              Difference]: Finished difference Result 41 states and 55 transitions.
[2022-02-24 04:14:27,697 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-02-24 04:14:27,698 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), 3 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
[2022-02-24 04:14:27,698 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-02-24 04:14:27,703 INFO  L225             Difference]: With dead ends: 41
[2022-02-24 04:14:27,703 INFO  L226             Difference]: Without dead ends: 19
[2022-02-24 04:14:27,705 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-02-24 04:14:27,713 INFO  L933         BasicCegarLoop]: 25 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-02-24 04:14:27,714 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 29 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-02-24 04:14:27,727 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 19 states.
[2022-02-24 04:14:27,745 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18.
[2022-02-24 04:14:27,746 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 18 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3)
[2022-02-24 04:14:27,747 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions.
[2022-02-24 04:14:27,748 INFO  L78                 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 11
[2022-02-24 04:14:27,748 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-02-24 04:14:27,749 INFO  L470      AbstractCegarLoop]: Abstraction has 18 states and 21 transitions.
[2022-02-24 04:14:27,749 INFO  L471      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), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2022-02-24 04:14:27,749 INFO  L276                IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions.
[2022-02-24 04:14:27,750 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 13
[2022-02-24 04:14:27,750 INFO  L506         BasicCegarLoop]: Found error trace
[2022-02-24 04:14:27,750 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-02-24 04:14:27,750 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2022-02-24 04:14:27,751 INFO  L402      AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-02-24 04:14:27,751 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-02-24 04:14:27,751 INFO  L85        PathProgramCache]: Analyzing trace with hash -2118701623, now seen corresponding path program 1 times
[2022-02-24 04:14:27,752 INFO  L126   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-02-24 04:14:27,752 INFO  L338   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [420612687]
[2022-02-24 04:14:27,752 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-02-24 04:14:27,753 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-02-24 04:14:27,755 INFO  L213   tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2022-02-24 04:14:27,769 WARN  L132   FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility
[2022-02-24 04:14:27,770 INFO  L628         BasicCegarLoop]: Counterexample might be feasible
[2022-02-24 04:14:27,776 INFO  L764   garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining)
[2022-02-24 04:14:27,777 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2022-02-24 04:14:27,780 INFO  L732         BasicCegarLoop]: Path program histogram: [1, 1]
[2022-02-24 04:14:27,782 INFO  L180   ceAbstractionStarter]: Computing trace abstraction results
[2022-02-24 04:14:27,792 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 04:14:27 BoogieIcfgContainer
[2022-02-24 04:14:27,792 INFO  L132        PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2022-02-24 04:14:27,793 INFO  L158              Benchmark]: Toolchain (without parser) took 962.44ms. Allocated memory was 192.9MB in the beginning and 244.3MB in the end (delta: 51.4MB). Free memory was 137.0MB in the beginning and 176.7MB in the end (delta: -39.7MB). Peak memory consumption was 11.6MB. Max. memory is 8.0GB.
[2022-02-24 04:14:27,793 INFO  L158              Benchmark]: CDTParser took 0.11ms. Allocated memory is still 192.9MB. Free memory is still 153.2MB. There was no memory consumed. Max. memory is 8.0GB.
[2022-02-24 04:14:27,794 INFO  L158              Benchmark]: CACSL2BoogieTranslator took 231.97ms. Allocated memory was 192.9MB in the beginning and 244.3MB in the end (delta: 51.4MB). Free memory was 136.7MB in the beginning and 215.3MB in the end (delta: -78.6MB). Peak memory consumption was 14.3MB. Max. memory is 8.0GB.
[2022-02-24 04:14:27,794 INFO  L158              Benchmark]: Boogie Preprocessor took 31.38ms. Allocated memory is still 244.3MB. Free memory was 215.3MB in the beginning and 213.9MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB.
[2022-02-24 04:14:27,795 INFO  L158              Benchmark]: RCFGBuilder took 292.79ms. Allocated memory is still 244.3MB. Free memory was 213.9MB in the beginning and 202.4MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB.
[2022-02-24 04:14:27,795 INFO  L158              Benchmark]: TraceAbstraction took 399.08ms. Allocated memory is still 244.3MB. Free memory was 201.8MB in the beginning and 176.7MB in the end (delta: 25.2MB). Peak memory consumption was 25.2MB. Max. memory is 8.0GB.
[2022-02-24 04:14:27,804 INFO  L339   ainManager$Toolchain]: #######################  End [Toolchain 1] #######################
 --- Results ---
 * Results from de.uni_freiburg.informatik.ultimate.core:
  - StatisticsResult: Toolchain Benchmarks
    Benchmark results are:
 * CDTParser took 0.11ms. Allocated memory is still 192.9MB. Free memory is still 153.2MB. There was no memory consumed. Max. memory is 8.0GB.
 * CACSL2BoogieTranslator took 231.97ms. Allocated memory was 192.9MB in the beginning and 244.3MB in the end (delta: 51.4MB). Free memory was 136.7MB in the beginning and 215.3MB in the end (delta: -78.6MB). Peak memory consumption was 14.3MB. Max. memory is 8.0GB.
 * Boogie Preprocessor took 31.38ms. Allocated memory is still 244.3MB. Free memory was 215.3MB in the beginning and 213.9MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB.
 * RCFGBuilder took 292.79ms. Allocated memory is still 244.3MB. Free memory was 213.9MB in the beginning and 202.4MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB.
 * TraceAbstraction took 399.08ms. Allocated memory is still 244.3MB. Free memory was 201.8MB in the beginning and 176.7MB in the end (delta: 25.2MB). Peak memory consumption was 25.2MB. Max. memory is 8.0GB.
 * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
  - StatisticsResult: ErrorAutomatonStatistics
    NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0
  - UnprovableResult [Line: 12]: Unable to prove that call to reach_error is unreachable
    Unable to prove that call to reach_error is unreachable
 Reason: unable to decide satisfiability of path constraint. 
Possible FailurePath: 
[L17]              int counter = 0;
[L19]              short k;
[L20]              long long y, x, c;
[L21]              k = __VERIFIER_nondet_short()
[L23]              y = 0
[L24]              x = 0
[L25]              c = 0
[L27]  EXPR        counter++
[L27]  COND FALSE  !(counter++<5)
[L37]  CALL        __VERIFIER_assert(k*y - (y*y) == 0)
[L10]  COND TRUE   !(cond)
[L12]              reach_error()

  - StatisticsResult: Ultimate Automizer benchmark data
    CFG has 6 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.3s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 6 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 6 mSDsluCounter, 29 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 4 mSDsCounter, 4 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 12 IncrementalHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 4 mSolverCounterUnsat, 25 mSDtfsCounter, 12 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=0, InterpolantAutomatonStates: 3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available
RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces
[2022-02-24 04:14:27,846 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0
Received shutdown request...