/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/freire1_valuebound2.c


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


This is Ultimate 0.2.2-dev-d966a43
[2022-01-31 23:39:34,883 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2022-01-31 23:39:34,884 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2022-01-31 23:39:34,930 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2022-01-31 23:39:34,930 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2022-01-31 23:39:34,932 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2022-01-31 23:39:34,936 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2022-01-31 23:39:34,938 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2022-01-31 23:39:34,939 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2022-01-31 23:39:34,942 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
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[2022-01-31 23:39:34,944 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2022-01-31 23:39:34,944 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2022-01-31 23:39:34,946 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2022-01-31 23:39:34,946 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2022-01-31 23:39:34,949 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2022-01-31 23:39:34,949 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2022-01-31 23:39:34,950 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2022-01-31 23:39:34,951 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2022-01-31 23:39:34,956 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2022-01-31 23:39:34,957 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2022-01-31 23:39:34,957 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2022-01-31 23:39:34,959 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2022-01-31 23:39:34,959 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2022-01-31 23:39:34,964 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2022-01-31 23:39:34,964 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2022-01-31 23:39:34,964 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2022-01-31 23:39:34,965 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2022-01-31 23:39:34,965 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2022-01-31 23:39:34,966 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2022-01-31 23:39:34,966 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2022-01-31 23:39:34,966 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2022-01-31 23:39:34,968 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2022-01-31 23:39:34,968 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2022-01-31 23:39:34,969 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2022-01-31 23:39:34,969 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
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[2022-01-31 23:39:34,970 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2022-01-31 23:39:34,971 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2022-01-31 23:39:34,971 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 23:39:34,980 INFO  L113        SettingsManager]: Loading preferences was successful
[2022-01-31 23:39:34,980 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2022-01-31 23:39:34,982 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2022-01-31 23:39:34,982 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2022-01-31 23:39:34,982 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2022-01-31 23:39:34,982 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2022-01-31 23:39:34,982 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2022-01-31 23:39:34,982 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2022-01-31 23:39:34,982 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2022-01-31 23:39:34,982 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2022-01-31 23:39:34,982 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2022-01-31 23:39:34,983 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2022-01-31 23:39:34,983 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2022-01-31 23:39:34,983 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2022-01-31 23:39:34,983 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2022-01-31 23:39:34,983 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-01-31 23:39:34,983 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2022-01-31 23:39:34,983 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=AcceleratedInterpolation
[2022-01-31 23:39:34,984 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2022-01-31 23:39:34,984 INFO  L138        SettingsManager]:  * Loop acceleration method that is used by accelerated interpolation=QVASR
[2022-01-31 23:39:34,984 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN;
[2022-01-31 23:39:35,225 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2022-01-31 23:39:35,245 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2022-01-31 23:39:35,247 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2022-01-31 23:39:35,250 INFO  L271        PluginConnector]: Initializing CDTParser...
[2022-01-31 23:39:35,250 INFO  L275        PluginConnector]: CDTParser initialized
[2022-01-31 23:39:35,251 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/freire1_valuebound2.c
[2022-01-31 23:39:35,302 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/641c91d60/2880e63edc4f48dca14b08cfd59118b9/FLAGa225ffec4
[2022-01-31 23:39:35,614 INFO  L306              CDTParser]: Found 1 translation units.
[2022-01-31 23:39:35,614 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/freire1_valuebound2.c
[2022-01-31 23:39:35,618 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/641c91d60/2880e63edc4f48dca14b08cfd59118b9/FLAGa225ffec4
[2022-01-31 23:39:35,625 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/641c91d60/2880e63edc4f48dca14b08cfd59118b9
[2022-01-31 23:39:35,627 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2022-01-31 23:39:35,627 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2022-01-31 23:39:35,628 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2022-01-31 23:39:35,628 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2022-01-31 23:39:35,633 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2022-01-31 23:39:35,634 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 11:39:35" (1/1) ...
[2022-01-31 23:39:35,634 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f73c85a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:39:35, skipping insertion in model container
[2022-01-31 23:39:35,634 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 11:39:35" (1/1) ...
[2022-01-31 23:39:35,638 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2022-01-31 23:39:35,646 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2022-01-31 23:39:35,752 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/freire1_valuebound2.c[712,725]
[2022-01-31 23:39:35,764 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-01-31 23:39:35,769 INFO  L203         MainTranslator]: Completed pre-run
[2022-01-31 23:39:35,779 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/freire1_valuebound2.c[712,725]
[2022-01-31 23:39:35,783 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-01-31 23:39:35,791 INFO  L208         MainTranslator]: Completed translation
[2022-01-31 23:39:35,792 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:39:35 WrapperNode
[2022-01-31 23:39:35,792 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2022-01-31 23:39:35,793 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2022-01-31 23:39:35,793 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2022-01-31 23:39:35,793 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2022-01-31 23:39:35,799 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:39:35" (1/1) ...
[2022-01-31 23:39:35,800 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:39:35" (1/1) ...
[2022-01-31 23:39:35,804 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:39:35" (1/1) ...
[2022-01-31 23:39:35,804 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:39:35" (1/1) ...
[2022-01-31 23:39:35,807 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:39:35" (1/1) ...
[2022-01-31 23:39:35,809 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:39:35" (1/1) ...
[2022-01-31 23:39:35,810 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:39:35" (1/1) ...
[2022-01-31 23:39:35,811 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2022-01-31 23:39:35,812 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2022-01-31 23:39:35,812 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2022-01-31 23:39:35,812 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2022-01-31 23:39:35,813 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:39:35" (1/1) ...
[2022-01-31 23:39:35,817 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-01-31 23:39:35,833 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-31 23:39:35,842 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 23:39:35,847 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 23:39:35,876 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2022-01-31 23:39:35,876 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2022-01-31 23:39:35,876 INFO  L138     BoogieDeclarations]: Found implementation of procedure reach_error
[2022-01-31 23:39:35,876 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2022-01-31 23:39:35,876 INFO  L138     BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2022-01-31 23:39:35,876 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2022-01-31 23:39:35,876 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2022-01-31 23:39:35,876 INFO  L130     BoogieDeclarations]: Found specification of procedure __assert_fail
[2022-01-31 23:39:35,877 INFO  L130     BoogieDeclarations]: Found specification of procedure reach_error
[2022-01-31 23:39:35,877 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2022-01-31 23:39:35,877 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_double
[2022-01-31 23:39:35,877 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2022-01-31 23:39:35,877 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2022-01-31 23:39:35,877 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2022-01-31 23:39:35,877 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2022-01-31 23:39:35,877 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2022-01-31 23:39:35,877 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2022-01-31 23:39:35,877 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2022-01-31 23:39:35,877 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2022-01-31 23:39:35,878 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2022-01-31 23:39:35,922 INFO  L234             CfgBuilder]: Building ICFG
[2022-01-31 23:39:35,923 INFO  L260             CfgBuilder]: Building CFG for each procedure with an implementation
[2022-01-31 23:39:36,007 INFO  L275             CfgBuilder]: Performing block encoding
[2022-01-31 23:39:36,017 INFO  L294             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2022-01-31 23:39:36,017 INFO  L299             CfgBuilder]: Removed 1 assume(true) statements.
[2022-01-31 23:39:36,018 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 11:39:36 BoogieIcfgContainer
[2022-01-31 23:39:36,019 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2022-01-31 23:39:36,033 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2022-01-31 23:39:36,033 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2022-01-31 23:39:36,036 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2022-01-31 23:39:36,036 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 11:39:35" (1/3) ...
[2022-01-31 23:39:36,036 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e1f1596 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 11:39:36, skipping insertion in model container
[2022-01-31 23:39:36,036 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:39:35" (2/3) ...
[2022-01-31 23:39:36,037 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e1f1596 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 11:39:36, skipping insertion in model container
[2022-01-31 23:39:36,037 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 11:39:36" (3/3) ...
[2022-01-31 23:39:36,038 INFO  L111   eAbstractionObserver]: Analyzing ICFG freire1_valuebound2.c
[2022-01-31 23:39:36,041 INFO  L205   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION
[2022-01-31 23:39:36,041 INFO  L164   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2022-01-31 23:39:36,084 INFO  L338      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2022-01-31 23:39:36,089 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 23:39:36,089 INFO  L340      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2022-01-31 23:39:36,098 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 27 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5)
[2022-01-31 23:39:36,102 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 18
[2022-01-31 23:39:36,102 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-31 23:39:36,103 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-31 23:39:36,103 INFO  L402      AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-31 23:39:36,108 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-31 23:39:36,108 INFO  L85        PathProgramCache]: Analyzing trace with hash 1914087080, now seen corresponding path program 1 times
[2022-01-31 23:39:36,113 INFO  L121   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-01-31 23:39:36,114 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [599323266]
[2022-01-31 23:39:36,114 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-31 23:39:36,122 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-31 23:39:36,149 INFO  L248   tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2022-01-31 23:39:36,174 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-31 23:39:36,223 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-01-31 23:39:36,233 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-31 23:39:36,239 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-01-31 23:39:36,246 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-31 23:39:36,260 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-31 23:39:36,261 INFO  L139   FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-01-31 23:39:36,261 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [599323266]
[2022-01-31 23:39:36,262 INFO  L160   FreeRefinementEngine]: IpTcStrategyModulePreferences [599323266] provided 1 perfect and 0 imperfect interpolant sequences
[2022-01-31 23:39:36,263 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-01-31 23:39:36,263 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2022-01-31 23:39:36,264 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083273735]
[2022-01-31 23:39:36,264 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-31 23:39:36,267 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-01-31 23:39:36,267 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-01-31 23:39:36,290 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-01-31 23:39:36,291 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-01-31 23:39:36,293 INFO  L87              Difference]: Start difference. First operand  has 27 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 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 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2)
[2022-01-31 23:39:36,350 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-31 23:39:36,350 INFO  L93              Difference]: Finished difference Result 45 states and 56 transitions.
[2022-01-31 23:39:36,351 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-01-31 23:39:36,352 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17
[2022-01-31 23:39:36,353 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-31 23:39:36,362 INFO  L225             Difference]: With dead ends: 45
[2022-01-31 23:39:36,362 INFO  L226             Difference]: Without dead ends: 22
[2022-01-31 23:39:36,366 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 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 23:39:36,369 INFO  L933         BasicCegarLoop]: 25 mSDtfsCounter, 15 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-01-31 23:39:36,370 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 28 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-01-31 23:39:36,381 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 22 states.
[2022-01-31 23:39:36,407 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22.
[2022-01-31 23:39:36,408 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 22 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3)
[2022-01-31 23:39:36,409 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions.
[2022-01-31 23:39:36,410 INFO  L78                 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 17
[2022-01-31 23:39:36,410 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-31 23:39:36,411 INFO  L470      AbstractCegarLoop]: Abstraction has 22 states and 23 transitions.
[2022-01-31 23:39:36,411 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2)
[2022-01-31 23:39:36,411 INFO  L276                IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions.
[2022-01-31 23:39:36,412 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 18
[2022-01-31 23:39:36,412 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-31 23:39:36,412 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-31 23:39:36,412 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2022-01-31 23:39:36,413 INFO  L402      AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-31 23:39:36,413 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-31 23:39:36,414 INFO  L85        PathProgramCache]: Analyzing trace with hash -1699034386, now seen corresponding path program 1 times
[2022-01-31 23:39:36,414 INFO  L121   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-01-31 23:39:36,414 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2008642012]
[2022-01-31 23:39:36,414 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-31 23:39:36,416 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-31 23:39:36,420 INFO  L248   tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2022-01-31 23:39:36,445 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2022-01-31 23:39:36,446 INFO  L352             TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2022-01-31 23:39:36,464 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2022-01-31 23:39:36,479 INFO  L133   FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace
[2022-01-31 23:39:36,480 INFO  L628         BasicCegarLoop]: Counterexample is feasible
[2022-01-31 23:39:36,482 INFO  L764   garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining)
[2022-01-31 23:39:36,483 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2022-01-31 23:39:36,488 INFO  L732         BasicCegarLoop]: Path program histogram: [1, 1]
[2022-01-31 23:39:36,490 INFO  L180   ceAbstractionStarter]: Computing trace abstraction results
[2022-01-31 23:39:36,500 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 11:39:36 BoogieIcfgContainer
[2022-01-31 23:39:36,500 INFO  L132        PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2022-01-31 23:39:36,501 INFO  L158              Benchmark]: Toolchain (without parser) took 873.36ms. Allocated memory is still 211.8MB. Free memory was 164.1MB in the beginning and 150.8MB in the end (delta: 13.3MB). Peak memory consumption was 13.8MB. Max. memory is 8.0GB.
[2022-01-31 23:39:36,501 INFO  L158              Benchmark]: CDTParser took 0.11ms. Allocated memory is still 211.8MB. Free memory was 180.4MB in the beginning and 180.3MB in the end (delta: 150.3kB). There was no memory consumed. Max. memory is 8.0GB.
[2022-01-31 23:39:36,502 INFO  L158              Benchmark]: CACSL2BoogieTranslator took 163.94ms. Allocated memory is still 211.8MB. Free memory was 163.9MB in the beginning and 189.6MB in the end (delta: -25.6MB). Peak memory consumption was 9.6MB. Max. memory is 8.0GB.
[2022-01-31 23:39:36,504 INFO  L158              Benchmark]: Boogie Preprocessor took 18.57ms. Allocated memory is still 211.8MB. Free memory was 189.6MB in the beginning and 188.0MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB.
[2022-01-31 23:39:36,505 INFO  L158              Benchmark]: RCFGBuilder took 206.90ms. Allocated memory is still 211.8MB. Free memory was 188.0MB in the beginning and 178.0MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB.
[2022-01-31 23:39:36,506 INFO  L158              Benchmark]: TraceAbstraction took 467.28ms. Allocated memory is still 211.8MB. Free memory was 177.5MB in the beginning and 150.8MB in the end (delta: 26.7MB). Peak memory consumption was 27.3MB. Max. memory is 8.0GB.
[2022-01-31 23:39:36,511 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 211.8MB. Free memory was 180.4MB in the beginning and 180.3MB in the end (delta: 150.3kB). There was no memory consumed. Max. memory is 8.0GB.
 * CACSL2BoogieTranslator took 163.94ms. Allocated memory is still 211.8MB. Free memory was 163.9MB in the beginning and 189.6MB in the end (delta: -25.6MB). Peak memory consumption was 9.6MB. Max. memory is 8.0GB.
 * Boogie Preprocessor took 18.57ms. Allocated memory is still 211.8MB. Free memory was 189.6MB in the beginning and 188.0MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB.
 * RCFGBuilder took 206.90ms. Allocated memory is still 211.8MB. Free memory was 188.0MB in the beginning and 178.0MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB.
 * TraceAbstraction took 467.28ms. Allocated memory is still 211.8MB. Free memory was 177.5MB in the beginning and 150.8MB in the end (delta: 26.7MB). Peak memory consumption was 27.3MB. 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: 19]: Unable to prove that call to reach_error is unreachable
    Unable to prove that call to reach_error is unreachable
 Reason: overapproximation of to_int at line 33, overapproximation of someBinaryDOUBLEComparisonOperation at line 28, overapproximation of someBinaryArithmeticDOUBLEoperation at line 29. 
Possible FailurePath: 
[L25]              int r;
[L26]              double a, x;
[L27]              a = __VERIFIER_nondet_double()
[L28]  CALL        assume_abort_if_not(a>=0 && a<=2)
[L14]  COND FALSE  !(!cond)
[L28]  RET         assume_abort_if_not(a>=0 && a<=2)
[L29]              x = a / 2.0
[L30]              r = 0
[L32]  COND TRUE   1
[L33]  CALL        __VERIFIER_assert((int)(r*r - a - r + 2*x) == 0)
[L17]  COND TRUE   !(cond)
[L19]              reach_error()

  - StatisticsResult: Ultimate Automizer benchmark data
    CFG has 6 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.4s, 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, 18 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 15 mSDsluCounter, 28 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3 mSDsCounter, 4 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5 IncrementalHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 4 mSolverCounterUnsat, 25 mSDtfsCounter, 5 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=27occurred 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 23:39:36,551 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...