/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/fermat1-ll_valuebound50.c


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


This is Ultimate 0.2.2-dev-d966a43
[2022-01-31 23:39:06,488 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2022-01-31 23:39:06,489 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2022-01-31 23:39:06,533 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2022-01-31 23:39:06,534 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2022-01-31 23:39:06,536 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2022-01-31 23:39:06,538 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2022-01-31 23:39:06,539 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2022-01-31 23:39:06,540 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2022-01-31 23:39:06,541 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2022-01-31 23:39:06,541 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2022-01-31 23:39:06,542 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2022-01-31 23:39:06,542 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2022-01-31 23:39:06,543 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2022-01-31 23:39:06,545 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2022-01-31 23:39:06,549 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2022-01-31 23:39:06,549 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2022-01-31 23:39:06,554 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2022-01-31 23:39:06,557 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2022-01-31 23:39:06,558 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2022-01-31 23:39:06,559 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2022-01-31 23:39:06,561 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2022-01-31 23:39:06,562 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2022-01-31 23:39:06,564 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2022-01-31 23:39:06,565 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2022-01-31 23:39:06,566 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2022-01-31 23:39:06,566 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2022-01-31 23:39:06,566 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2022-01-31 23:39:06,567 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2022-01-31 23:39:06,567 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2022-01-31 23:39:06,567 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2022-01-31 23:39:06,568 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2022-01-31 23:39:06,568 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2022-01-31 23:39:06,569 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2022-01-31 23:39:06,569 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2022-01-31 23:39:06,569 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2022-01-31 23:39:06,570 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2022-01-31 23:39:06,570 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2022-01-31 23:39:06,570 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2022-01-31 23:39:06,571 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2022-01-31 23:39:06,571 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf
[2022-01-31 23:39:06,577 INFO  L113        SettingsManager]: Loading preferences was successful
[2022-01-31 23:39:06,577 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2022-01-31 23:39:06,578 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2022-01-31 23:39:06,578 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2022-01-31 23:39:06,578 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2022-01-31 23:39:06,578 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2022-01-31 23:39:06,578 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2022-01-31 23:39:06,578 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2022-01-31 23:39:06,578 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2022-01-31 23:39:06,578 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2022-01-31 23:39:06,578 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2022-01-31 23:39:06,579 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2022-01-31 23:39:06,579 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2022-01-31 23:39:06,579 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2022-01-31 23:39:06,579 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2022-01-31 23:39:06,579 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-01-31 23:39:06,579 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2022-01-31 23:39:06,579 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=AcceleratedInterpolation
[2022-01-31 23:39:06,579 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2022-01-31 23:39:06,579 INFO  L138        SettingsManager]:  * Loop acceleration method that is used by accelerated interpolation=QVASR
[2022-01-31 23:39:06,579 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN;
[2022-01-31 23:39:06,764 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2022-01-31 23:39:06,778 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2022-01-31 23:39:06,780 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2022-01-31 23:39:06,781 INFO  L271        PluginConnector]: Initializing CDTParser...
[2022-01-31 23:39:06,781 INFO  L275        PluginConnector]: CDTParser initialized
[2022-01-31 23:39:06,782 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_valuebound50.c
[2022-01-31 23:39:06,845 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b9ae5963a/5ab6b70265cf4ee38605eee1b4a85025/FLAG8f2bdab81
[2022-01-31 23:39:07,203 INFO  L306              CDTParser]: Found 1 translation units.
[2022-01-31 23:39:07,203 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_valuebound50.c
[2022-01-31 23:39:07,207 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b9ae5963a/5ab6b70265cf4ee38605eee1b4a85025/FLAG8f2bdab81
[2022-01-31 23:39:07,227 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b9ae5963a/5ab6b70265cf4ee38605eee1b4a85025
[2022-01-31 23:39:07,229 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2022-01-31 23:39:07,230 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2022-01-31 23:39:07,231 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2022-01-31 23:39:07,231 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2022-01-31 23:39:07,233 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2022-01-31 23:39:07,234 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 11:39:07" (1/1) ...
[2022-01-31 23:39:07,235 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c7fdf77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:39:07, skipping insertion in model container
[2022-01-31 23:39:07,235 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 11:39:07" (1/1) ...
[2022-01-31 23:39:07,239 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2022-01-31 23:39:07,250 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2022-01-31 23:39:07,363 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/fermat1-ll_valuebound50.c[535,548]
[2022-01-31 23:39:07,379 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-01-31 23:39:07,383 INFO  L203         MainTranslator]: Completed pre-run
[2022-01-31 23:39:07,390 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/fermat1-ll_valuebound50.c[535,548]
[2022-01-31 23:39:07,395 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-01-31 23:39:07,403 INFO  L208         MainTranslator]: Completed translation
[2022-01-31 23:39:07,403 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:39:07 WrapperNode
[2022-01-31 23:39:07,403 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2022-01-31 23:39:07,404 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2022-01-31 23:39:07,404 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2022-01-31 23:39:07,404 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2022-01-31 23:39:07,411 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:39:07" (1/1) ...
[2022-01-31 23:39:07,411 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:39:07" (1/1) ...
[2022-01-31 23:39:07,414 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:39:07" (1/1) ...
[2022-01-31 23:39:07,415 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:39:07" (1/1) ...
[2022-01-31 23:39:07,417 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:39:07" (1/1) ...
[2022-01-31 23:39:07,419 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:39:07" (1/1) ...
[2022-01-31 23:39:07,420 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:39:07" (1/1) ...
[2022-01-31 23:39:07,421 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2022-01-31 23:39:07,421 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2022-01-31 23:39:07,422 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2022-01-31 23:39:07,422 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2022-01-31 23:39:07,428 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:39:07" (1/1) ...
[2022-01-31 23:39:07,433 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-01-31 23:39:07,440 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-31 23:39:07,460 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)
[2022-01-31 23:39:07,479 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
[2022-01-31 23:39:07,488 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2022-01-31 23:39:07,488 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2022-01-31 23:39:07,488 INFO  L138     BoogieDeclarations]: Found implementation of procedure reach_error
[2022-01-31 23:39:07,488 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2022-01-31 23:39:07,488 INFO  L138     BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2022-01-31 23:39:07,488 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2022-01-31 23:39:07,488 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2022-01-31 23:39:07,488 INFO  L130     BoogieDeclarations]: Found specification of procedure __assert_fail
[2022-01-31 23:39:07,488 INFO  L130     BoogieDeclarations]: Found specification of procedure reach_error
[2022-01-31 23:39:07,489 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2022-01-31 23:39:07,489 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2022-01-31 23:39:07,489 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2022-01-31 23:39:07,489 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2022-01-31 23:39:07,489 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2022-01-31 23:39:07,489 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2022-01-31 23:39:07,489 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2022-01-31 23:39:07,490 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2022-01-31 23:39:07,490 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2022-01-31 23:39:07,491 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2022-01-31 23:39:07,491 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2022-01-31 23:39:07,535 INFO  L234             CfgBuilder]: Building ICFG
[2022-01-31 23:39:07,536 INFO  L260             CfgBuilder]: Building CFG for each procedure with an implementation
[2022-01-31 23:39:07,691 INFO  L275             CfgBuilder]: Performing block encoding
[2022-01-31 23:39:07,695 INFO  L294             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2022-01-31 23:39:07,695 INFO  L299             CfgBuilder]: Removed 3 assume(true) statements.
[2022-01-31 23:39:07,696 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 11:39:07 BoogieIcfgContainer
[2022-01-31 23:39:07,697 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2022-01-31 23:39:07,700 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2022-01-31 23:39:07,700 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2022-01-31 23:39:07,710 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2022-01-31 23:39:07,710 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 11:39:07" (1/3) ...
[2022-01-31 23:39:07,711 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@142be992 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 11:39:07, skipping insertion in model container
[2022-01-31 23:39:07,712 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:39:07" (2/3) ...
[2022-01-31 23:39:07,712 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@142be992 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 11:39:07, skipping insertion in model container
[2022-01-31 23:39:07,712 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 11:39:07" (3/3) ...
[2022-01-31 23:39:07,713 INFO  L111   eAbstractionObserver]: Analyzing ICFG fermat1-ll_valuebound50.c
[2022-01-31 23:39:07,724 INFO  L205   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION
[2022-01-31 23:39:07,724 INFO  L164   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2022-01-31 23:39:07,752 INFO  L338      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2022-01-31 23:39:07,756 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
[2022-01-31 23:39:07,757 INFO  L340      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2022-01-31 23:39:07,766 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 37 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10)
[2022-01-31 23:39:07,774 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 34
[2022-01-31 23:39:07,774 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-31 23:39:07,775 INFO  L514         BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-31 23:39:07,775 INFO  L402      AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-31 23:39:07,779 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-31 23:39:07,779 INFO  L85        PathProgramCache]: Analyzing trace with hash -1718462925, now seen corresponding path program 1 times
[2022-01-31 23:39:07,785 INFO  L121   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-01-31 23:39:07,785 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [182068361]
[2022-01-31 23:39:07,785 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-31 23:39:07,795 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-31 23:39:07,832 INFO  L248   tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2022-01-31 23:39:07,879 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-31 23:39:07,915 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-01-31 23:39:07,917 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-31 23:39:07,930 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-01-31 23:39:07,942 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-31 23:39:07,946 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12
[2022-01-31 23:39:07,948 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-31 23:39:07,951 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17
[2022-01-31 23:39:07,953 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-31 23:39:07,956 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22
[2022-01-31 23:39:07,958 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-31 23:39:07,962 INFO  L134       CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked.
[2022-01-31 23:39:07,963 INFO  L139   FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-01-31 23:39:07,964 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [182068361]
[2022-01-31 23:39:07,965 INFO  L160   FreeRefinementEngine]: IpTcStrategyModulePreferences [182068361] provided 1 perfect and 0 imperfect interpolant sequences
[2022-01-31 23:39:07,965 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-01-31 23:39:07,965 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2022-01-31 23:39:07,966 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251698011]
[2022-01-31 23:39:07,966 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-31 23:39:07,969 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-01-31 23:39:07,969 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-01-31 23:39:07,985 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-01-31 23:39:07,986 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-01-31 23:39:07,987 INFO  L87              Difference]: Start difference. First operand  has 37 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand  has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5)
[2022-01-31 23:39:08,040 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-31 23:39:08,041 INFO  L93              Difference]: Finished difference Result 67 states and 106 transitions.
[2022-01-31 23:39:08,042 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-01-31 23:39:08,043 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33
[2022-01-31 23:39:08,043 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-31 23:39:08,047 INFO  L225             Difference]: With dead ends: 67
[2022-01-31 23:39:08,047 INFO  L226             Difference]: Without dead ends: 32
[2022-01-31 23:39:08,049 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-01-31 23:39:08,052 INFO  L933         BasicCegarLoop]: 37 mSDtfsCounter, 22 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-01-31 23:39:08,052 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 40 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-01-31 23:39:08,063 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 32 states.
[2022-01-31 23:39:08,083 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32.
[2022-01-31 23:39:08,084 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 32 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8)
[2022-01-31 23:39:08,085 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions.
[2022-01-31 23:39:08,086 INFO  L78                 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 33
[2022-01-31 23:39:08,086 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-31 23:39:08,086 INFO  L470      AbstractCegarLoop]: Abstraction has 32 states and 40 transitions.
[2022-01-31 23:39:08,086 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5)
[2022-01-31 23:39:08,086 INFO  L276                IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions.
[2022-01-31 23:39:08,087 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 34
[2022-01-31 23:39:08,088 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-31 23:39:08,088 INFO  L514         BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-31 23:39:08,088 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2022-01-31 23:39:08,088 INFO  L402      AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-31 23:39:08,089 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-31 23:39:08,089 INFO  L85        PathProgramCache]: Analyzing trace with hash 657160210, now seen corresponding path program 1 times
[2022-01-31 23:39:08,089 INFO  L121   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-01-31 23:39:08,089 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1308784693]
[2022-01-31 23:39:08,089 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-31 23:39:08,090 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-31 23:39:08,091 INFO  L248   tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2022-01-31 23:39:08,105 WARN  L127   FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility
[2022-01-31 23:39:08,105 INFO  L628         BasicCegarLoop]: Counterexample might be feasible
[2022-01-31 23:39:08,109 INFO  L764   garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining)
[2022-01-31 23:39:08,111 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2022-01-31 23:39:08,113 INFO  L732         BasicCegarLoop]: Path program histogram: [1, 1]
[2022-01-31 23:39:08,114 INFO  L180   ceAbstractionStarter]: Computing trace abstraction results
[2022-01-31 23:39:08,122 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 11:39:08 BoogieIcfgContainer
[2022-01-31 23:39:08,122 INFO  L132        PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2022-01-31 23:39:08,122 INFO  L158              Benchmark]: Toolchain (without parser) took 892.54ms. Allocated memory is still 194.0MB. Free memory was 141.4MB in the beginning and 122.7MB in the end (delta: 18.7MB). Peak memory consumption was 17.9MB. Max. memory is 8.0GB.
[2022-01-31 23:39:08,123 INFO  L158              Benchmark]: CDTParser took 0.10ms. Allocated memory is still 194.0MB. Free memory is still 157.5MB. There was no memory consumed. Max. memory is 8.0GB.
[2022-01-31 23:39:08,123 INFO  L158              Benchmark]: CACSL2BoogieTranslator took 172.62ms. Allocated memory is still 194.0MB. Free memory was 141.2MB in the beginning and 166.2MB in the end (delta: -25.0MB). Peak memory consumption was 9.6MB. Max. memory is 8.0GB.
[2022-01-31 23:39:08,124 INFO  L158              Benchmark]: Boogie Preprocessor took 17.00ms. Allocated memory is still 194.0MB. Free memory was 166.2MB in the beginning and 164.6MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB.
[2022-01-31 23:39:08,124 INFO  L158              Benchmark]: RCFGBuilder took 275.07ms. Allocated memory is still 194.0MB. Free memory was 164.6MB in the beginning and 153.1MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB.
[2022-01-31 23:39:08,124 INFO  L158              Benchmark]: TraceAbstraction took 421.92ms. Allocated memory is still 194.0MB. Free memory was 152.6MB in the beginning and 122.7MB in the end (delta: 29.9MB). Peak memory consumption was 29.4MB. Max. memory is 8.0GB.
[2022-01-31 23:39:08,126 INFO  L339   ainManager$Toolchain]: #######################  End [Toolchain 1] #######################
 --- Results ---
 * Results from de.uni_freiburg.informatik.ultimate.core:
  - StatisticsResult: Toolchain Benchmarks
    Benchmark results are:
 * CDTParser took 0.10ms. Allocated memory is still 194.0MB. Free memory is still 157.5MB. There was no memory consumed. Max. memory is 8.0GB.
 * CACSL2BoogieTranslator took 172.62ms. Allocated memory is still 194.0MB. Free memory was 141.2MB in the beginning and 166.2MB in the end (delta: -25.0MB). Peak memory consumption was 9.6MB. Max. memory is 8.0GB.
 * Boogie Preprocessor took 17.00ms. Allocated memory is still 194.0MB. Free memory was 166.2MB in the beginning and 164.6MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB.
 * RCFGBuilder took 275.07ms. Allocated memory is still 194.0MB. Free memory was 164.6MB in the beginning and 153.1MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB.
 * TraceAbstraction took 421.92ms. Allocated memory is still 194.0MB. Free memory was 152.6MB in the beginning and 122.7MB in the end (delta: 29.9MB). Peak memory consumption was 29.4MB. 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: 14]: 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: 
[L20]              int A, R;
[L21]              long long u, v, r;
[L22]              A = __VERIFIER_nondet_int()
[L23]  CALL        assume_abort_if_not(A>=0 && A<=50)
[L9]   COND FALSE  !(!cond)
[L23]  RET         assume_abort_if_not(A>=0 && A<=50)
[L24]              R = __VERIFIER_nondet_int()
[L25]  CALL        assume_abort_if_not(R>=0 && R<=50)
[L9]   COND FALSE  !(!cond)
[L25]  RET         assume_abort_if_not(R>=0 && R<=50)
[L26]  CALL        assume_abort_if_not((((long long) R - 1) * ((long long) R - 1)) < A)
[L9]   COND FALSE  !(!cond)
[L26]  RET         assume_abort_if_not((((long long) R - 1) * ((long long) R - 1)) < A)
[L28]  CALL        assume_abort_if_not(A % 2 == 1)
[L9]   COND FALSE  !(!cond)
[L28]  RET         assume_abort_if_not(A % 2 == 1)
[L30]              u = ((long long) 2 * R) + 1
[L31]              v = 1
[L32]              r = ((long long) R * R) - A
[L35]  COND TRUE   1
[L36]  CALL        __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v)
[L12]  COND TRUE   !(cond)
[L14]              reach_error()

  - StatisticsResult: Ultimate Automizer benchmark data
    CFG has 6 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.4s, OverallIterations: 2, TraceHistogramMax: 4, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 30 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 22 mSDsluCounter, 40 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3 mSDsCounter, 9 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 10 IncrementalHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 9 mSolverCounterUnsat, 37 mSDtfsCounter, 10 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred 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, 0 StatesRemovedByMinimization, 0 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
[2022-01-31 23:39:08,164 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0
Received shutdown request...