/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/ps2-ll_valuebound20.c


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


This is Ultimate 0.2.2-dev-7968f31
[2022-03-18 04:25:19,925 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2022-03-18 04:25:19,927 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2022-03-18 04:25:19,958 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2022-03-18 04:25:19,958 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2022-03-18 04:25:19,961 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2022-03-18 04:25:19,962 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2022-03-18 04:25:19,964 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2022-03-18 04:25:19,965 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2022-03-18 04:25:19,969 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2022-03-18 04:25:19,969 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2022-03-18 04:25:19,970 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2022-03-18 04:25:19,970 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2022-03-18 04:25:19,972 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2022-03-18 04:25:19,973 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2022-03-18 04:25:19,976 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2022-03-18 04:25:19,977 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2022-03-18 04:25:19,977 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2022-03-18 04:25:19,979 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2022-03-18 04:25:19,982 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2022-03-18 04:25:19,984 INFO  L181        SettingsManager]: Resetting HornVerifier preferences to default values
[2022-03-18 04:25:19,984 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2022-03-18 04:25:19,985 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2022-03-18 04:25:19,985 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2022-03-18 04:25:19,986 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2022-03-18 04:25:19,991 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2022-03-18 04:25:19,991 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2022-03-18 04:25:19,991 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2022-03-18 04:25:19,992 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2022-03-18 04:25:19,992 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2022-03-18 04:25:19,992 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2022-03-18 04:25:19,993 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2022-03-18 04:25:19,994 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2022-03-18 04:25:19,994 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2022-03-18 04:25:19,995 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2022-03-18 04:25:19,995 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2022-03-18 04:25:19,996 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2022-03-18 04:25:19,996 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2022-03-18 04:25:19,996 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2022-03-18 04:25:19,996 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2022-03-18 04:25:19,997 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2022-03-18 04:25:19,998 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2022-03-18 04:25:19,998 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf
[2022-03-18 04:25:20,006 INFO  L113        SettingsManager]: Loading preferences was successful
[2022-03-18 04:25:20,006 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2022-03-18 04:25:20,007 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2022-03-18 04:25:20,007 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2022-03-18 04:25:20,007 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2022-03-18 04:25:20,008 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2022-03-18 04:25:20,008 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2022-03-18 04:25:20,008 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2022-03-18 04:25:20,008 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2022-03-18 04:25:20,008 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2022-03-18 04:25:20,009 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2022-03-18 04:25:20,009 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2022-03-18 04:25:20,009 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2022-03-18 04:25:20,009 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2022-03-18 04:25:20,009 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2022-03-18 04:25:20,009 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-03-18 04:25:20,009 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2022-03-18 04:25:20,009 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=Craig_NestedInterpolation
[2022-03-18 04:25:20,009 INFO  L138        SettingsManager]:  * Trace refinement strategy=ACCELERATED_INTERPOLATION
[2022-03-18 04:25:20,010 INFO  L138        SettingsManager]:  * Trace refinement strategy used in Accelerated Interpolation=CAMEL
[2022-03-18 04:25:20,010 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2022-03-18 04:25:20,010 INFO  L138        SettingsManager]:  * Loop acceleration method that is used by accelerated interpolation=QVASR
[2022-03-18 04:25:20,010 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN;
[2022-03-18 04:25:20,202 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2022-03-18 04:25:20,219 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2022-03-18 04:25:20,221 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2022-03-18 04:25:20,222 INFO  L271        PluginConnector]: Initializing CDTParser...
[2022-03-18 04:25:20,225 INFO  L275        PluginConnector]: CDTParser initialized
[2022-03-18 04:25:20,226 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps2-ll_valuebound20.c
[2022-03-18 04:25:20,299 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87f9e51af/9464b602ba984ebf99ce4600ebe1e0c7/FLAG069e8ad86
[2022-03-18 04:25:20,674 INFO  L306              CDTParser]: Found 1 translation units.
[2022-03-18 04:25:20,675 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps2-ll_valuebound20.c
[2022-03-18 04:25:20,681 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87f9e51af/9464b602ba984ebf99ce4600ebe1e0c7/FLAG069e8ad86
[2022-03-18 04:25:20,693 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87f9e51af/9464b602ba984ebf99ce4600ebe1e0c7
[2022-03-18 04:25:20,695 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2022-03-18 04:25:20,696 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2022-03-18 04:25:20,711 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2022-03-18 04:25:20,711 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2022-03-18 04:25:20,714 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2022-03-18 04:25:20,716 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 04:25:20" (1/1) ...
[2022-03-18 04:25:20,716 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57484636 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:25:20, skipping insertion in model container
[2022-03-18 04:25:20,717 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 04:25:20" (1/1) ...
[2022-03-18 04:25:20,721 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2022-03-18 04:25:20,728 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2022-03-18 04:25:20,834 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/ps2-ll_valuebound20.c[454,467]
[2022-03-18 04:25:20,841 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-03-18 04:25:20,869 INFO  L203         MainTranslator]: Completed pre-run
[2022-03-18 04:25:20,878 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/ps2-ll_valuebound20.c[454,467]
[2022-03-18 04:25:20,884 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-03-18 04:25:20,891 INFO  L208         MainTranslator]: Completed translation
[2022-03-18 04:25:20,891 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:25:20 WrapperNode
[2022-03-18 04:25:20,892 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2022-03-18 04:25:20,893 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2022-03-18 04:25:20,893 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2022-03-18 04:25:20,894 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2022-03-18 04:25:20,901 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:25:20" (1/1) ...
[2022-03-18 04:25:20,902 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:25:20" (1/1) ...
[2022-03-18 04:25:20,907 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:25:20" (1/1) ...
[2022-03-18 04:25:20,907 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:25:20" (1/1) ...
[2022-03-18 04:25:20,917 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:25:20" (1/1) ...
[2022-03-18 04:25:20,919 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:25:20" (1/1) ...
[2022-03-18 04:25:20,920 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:25:20" (1/1) ...
[2022-03-18 04:25:20,925 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2022-03-18 04:25:20,925 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2022-03-18 04:25:20,925 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2022-03-18 04:25:20,925 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2022-03-18 04:25:20,927 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:25:20" (1/1) ...
[2022-03-18 04:25:20,932 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-03-18 04:25:20,938 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-03-18 04:25:20,989 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)
[2022-03-18 04:25:21,015 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
[2022-03-18 04:25:21,031 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2022-03-18 04:25:21,032 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2022-03-18 04:25:21,032 INFO  L138     BoogieDeclarations]: Found implementation of procedure reach_error
[2022-03-18 04:25:21,032 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2022-03-18 04:25:21,032 INFO  L138     BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2022-03-18 04:25:21,032 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2022-03-18 04:25:21,032 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2022-03-18 04:25:21,032 INFO  L130     BoogieDeclarations]: Found specification of procedure __assert_fail
[2022-03-18 04:25:21,033 INFO  L130     BoogieDeclarations]: Found specification of procedure reach_error
[2022-03-18 04:25:21,033 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2022-03-18 04:25:21,033 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2022-03-18 04:25:21,033 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2022-03-18 04:25:21,033 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2022-03-18 04:25:21,033 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2022-03-18 04:25:21,034 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2022-03-18 04:25:21,034 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2022-03-18 04:25:21,034 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2022-03-18 04:25:21,034 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2022-03-18 04:25:21,034 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2022-03-18 04:25:21,034 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2022-03-18 04:25:21,079 INFO  L234             CfgBuilder]: Building ICFG
[2022-03-18 04:25:21,080 INFO  L260             CfgBuilder]: Building CFG for each procedure with an implementation
[2022-03-18 04:25:21,186 INFO  L275             CfgBuilder]: Performing block encoding
[2022-03-18 04:25:21,189 INFO  L294             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2022-03-18 04:25:21,189 INFO  L299             CfgBuilder]: Removed 1 assume(true) statements.
[2022-03-18 04:25:21,190 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 04:25:21 BoogieIcfgContainer
[2022-03-18 04:25:21,191 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2022-03-18 04:25:21,191 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2022-03-18 04:25:21,192 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2022-03-18 04:25:21,209 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2022-03-18 04:25:21,209 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 04:25:20" (1/3) ...
[2022-03-18 04:25:21,209 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20bc7371 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 04:25:21, skipping insertion in model container
[2022-03-18 04:25:21,209 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:25:20" (2/3) ...
[2022-03-18 04:25:21,210 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20bc7371 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 04:25:21, skipping insertion in model container
[2022-03-18 04:25:21,210 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 04:25:21" (3/3) ...
[2022-03-18 04:25:21,210 INFO  L111   eAbstractionObserver]: Analyzing ICFG ps2-ll_valuebound20.c
[2022-03-18 04:25:21,218 INFO  L205   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2022-03-18 04:25:21,218 INFO  L164   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2022-03-18 04:25:21,244 INFO  L339      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2022-03-18 04:25:21,260 INFO  L340      AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, 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
[2022-03-18 04:25:21,260 INFO  L341      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2022-03-18 04:25:21,268 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)
[2022-03-18 04:25:21,276 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 18
[2022-03-18 04:25:21,276 INFO  L492         BasicCegarLoop]: Found error trace
[2022-03-18 04:25:21,276 INFO  L500         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-03-18 04:25:21,277 INFO  L403      AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-03-18 04:25:21,280 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-03-18 04:25:21,280 INFO  L85        PathProgramCache]: Analyzing trace with hash 1914087080, now seen corresponding path program 1 times
[2022-03-18 04:25:21,285 INFO  L118   FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION
[2022-03-18 04:25:21,285 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1123095784]
[2022-03-18 04:25:21,300 INFO  L202   tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2022-03-18 04:25:21,303 INFO  L85        PathProgramCache]: Analyzing trace with hash 1914087080, now seen corresponding path program 2 times
[2022-03-18 04:25:21,305 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-03-18 04:25:21,305 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708590744]
[2022-03-18 04:25:21,305 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-03-18 04:25:21,306 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-03-18 04:25:21,367 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-03-18 04:25:21,404 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-03-18 04:25:21,406 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-03-18 04:25:21,411 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-03-18 04:25:21,412 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-03-18 04:25:21,416 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-03-18 04:25:21,416 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-03-18 04:25:21,417 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708590744]
[2022-03-18 04:25:21,417 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708590744] provided 1 perfect and 0 imperfect interpolant sequences
[2022-03-18 04:25:21,417 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-03-18 04:25:21,417 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2022-03-18 04:25:21,419 INFO  L136   FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace
[2022-03-18 04:25:21,419 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1123095784]
[2022-03-18 04:25:21,419 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1123095784] provided 1 perfect and 0 imperfect interpolant sequences
[2022-03-18 04:25:21,419 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-03-18 04:25:21,419 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2022-03-18 04:25:21,419 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556830776]
[2022-03-18 04:25:21,420 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-03-18 04:25:21,422 INFO  L554      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-03-18 04:25:21,423 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION
[2022-03-18 04:25:21,441 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-03-18 04:25:21,444 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-03-18 04:25:21,445 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)
[2022-03-18 04:25:21,499 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-03-18 04:25:21,500 INFO  L93              Difference]: Finished difference Result 45 states and 56 transitions.
[2022-03-18 04:25:21,501 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-03-18 04:25:21,502 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
[2022-03-18 04:25:21,502 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-03-18 04:25:21,506 INFO  L225             Difference]: With dead ends: 45
[2022-03-18 04:25:21,506 INFO  L226             Difference]: Without dead ends: 22
[2022-03-18 04:25:21,508 INFO  L911         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
[2022-03-18 04:25:21,511 INFO  L912         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
[2022-03-18 04:25:21,511 INFO  L913         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]
[2022-03-18 04:25:21,525 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 22 states.
[2022-03-18 04:25:21,535 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22.
[2022-03-18 04:25:21,536 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)
[2022-03-18 04:25:21,537 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions.
[2022-03-18 04:25:21,538 INFO  L78                 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 17
[2022-03-18 04:25:21,538 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-03-18 04:25:21,538 INFO  L478      AbstractCegarLoop]: Abstraction has 22 states and 23 transitions.
[2022-03-18 04:25:21,538 INFO  L479      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)
[2022-03-18 04:25:21,538 INFO  L276                IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions.
[2022-03-18 04:25:21,538 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 18
[2022-03-18 04:25:21,539 INFO  L492         BasicCegarLoop]: Found error trace
[2022-03-18 04:25:21,539 INFO  L500         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-03-18 04:25:21,539 WARN  L460      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2022-03-18 04:25:21,539 INFO  L403      AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-03-18 04:25:21,539 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-03-18 04:25:21,540 INFO  L85        PathProgramCache]: Analyzing trace with hash -1699034386, now seen corresponding path program 1 times
[2022-03-18 04:25:21,540 INFO  L118   FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION
[2022-03-18 04:25:21,540 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [406615877]
[2022-03-18 04:25:21,541 INFO  L202   tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2022-03-18 04:25:21,541 INFO  L85        PathProgramCache]: Analyzing trace with hash -1699034386, now seen corresponding path program 2 times
[2022-03-18 04:25:21,541 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-03-18 04:25:21,541 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720333342]
[2022-03-18 04:25:21,541 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-03-18 04:25:21,541 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-03-18 04:25:21,552 ERROR L245   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-03-18 04:25:21,553 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1481702412]
[2022-03-18 04:25:21,553 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2022-03-18 04:25:21,553 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-03-18 04:25:21,553 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-03-18 04:25:21,557 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-03-18 04:25:21,558 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2022-03-18 04:25:21,613 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s)
[2022-03-18 04:25:21,613 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-03-18 04:25:21,615 INFO  L263         TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core
[2022-03-18 04:25:21,618 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-03-18 04:25:21,694 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-03-18 04:25:21,694 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2022-03-18 04:25:21,695 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-03-18 04:25:21,695 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720333342]
[2022-03-18 04:25:21,695 WARN  L310   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-03-18 04:25:21,695 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481702412]
[2022-03-18 04:25:21,695 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481702412] provided 1 perfect and 0 imperfect interpolant sequences
[2022-03-18 04:25:21,695 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-03-18 04:25:21,696 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2022-03-18 04:25:21,696 INFO  L136   FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace
[2022-03-18 04:25:21,696 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [406615877]
[2022-03-18 04:25:21,697 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [406615877] provided 1 perfect and 0 imperfect interpolant sequences
[2022-03-18 04:25:21,697 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-03-18 04:25:21,697 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2022-03-18 04:25:21,697 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219630784]
[2022-03-18 04:25:21,697 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-03-18 04:25:21,697 INFO  L554      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2022-03-18 04:25:21,697 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION
[2022-03-18 04:25:21,698 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2022-03-18 04:25:21,698 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2022-03-18 04:25:21,698 INFO  L87              Difference]: Start difference. First operand 22 states and 23 transitions. Second operand  has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2)
[2022-03-18 04:25:21,736 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-03-18 04:25:21,737 INFO  L93              Difference]: Finished difference Result 32 states and 34 transitions.
[2022-03-18 04:25:21,737 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2022-03-18 04:25:21,737 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17
[2022-03-18 04:25:21,738 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-03-18 04:25:21,738 INFO  L225             Difference]: With dead ends: 32
[2022-03-18 04:25:21,738 INFO  L226             Difference]: Without dead ends: 29
[2022-03-18 04:25:21,739 INFO  L911         BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2022-03-18 04:25:21,740 INFO  L912         BasicCegarLoop]: 20 mSDtfsCounter, 6 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-03-18 04:25:21,742 INFO  L913         BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 76 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-03-18 04:25:21,748 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 29 states.
[2022-03-18 04:25:21,753 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29.
[2022-03-18 04:25:21,753 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 29 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4)
[2022-03-18 04:25:21,753 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions.
[2022-03-18 04:25:21,754 INFO  L78                 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 17
[2022-03-18 04:25:21,754 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-03-18 04:25:21,754 INFO  L478      AbstractCegarLoop]: Abstraction has 29 states and 30 transitions.
[2022-03-18 04:25:21,754 INFO  L479      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2)
[2022-03-18 04:25:21,754 INFO  L276                IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions.
[2022-03-18 04:25:21,755 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 25
[2022-03-18 04:25:21,755 INFO  L492         BasicCegarLoop]: Found error trace
[2022-03-18 04:25:21,755 INFO  L500         BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-03-18 04:25:21,774 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0
[2022-03-18 04:25:21,971 WARN  L460      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-03-18 04:25:21,972 INFO  L403      AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-03-18 04:25:21,973 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-03-18 04:25:21,973 INFO  L85        PathProgramCache]: Analyzing trace with hash 276758134, now seen corresponding path program 1 times
[2022-03-18 04:25:21,973 INFO  L118   FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION
[2022-03-18 04:25:21,974 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [529259972]
[2022-03-18 04:26:48,794 INFO  L271   tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE
[2022-03-18 04:26:48,796 INFO  L85        PathProgramCache]: Analyzing trace with hash 22480176, now seen corresponding path program 1 times
[2022-03-18 04:26:48,796 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-03-18 04:26:48,796 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310160964]
[2022-03-18 04:26:48,796 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-03-18 04:26:48,796 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-03-18 04:26:48,806 ERROR L245   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-03-18 04:26:48,806 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1759611342]
[2022-03-18 04:26:48,807 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-03-18 04:26:48,807 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-03-18 04:26:48,807 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-03-18 04:26:48,809 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-03-18 04:26:48,810 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2022-03-18 04:26:48,843 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-03-18 04:26:48,844 INFO  L263         TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 8 conjunts are in the unsatisfiable core
[2022-03-18 04:26:48,845 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-03-18 04:26:48,934 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-03-18 04:26:48,934 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2022-03-18 04:26:48,935 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-03-18 04:26:48,935 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310160964]
[2022-03-18 04:26:48,935 WARN  L310   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-03-18 04:26:48,935 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759611342]
[2022-03-18 04:26:48,935 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759611342] provided 1 perfect and 0 imperfect interpolant sequences
[2022-03-18 04:26:48,936 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-03-18 04:26:48,936 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2022-03-18 04:26:49,002 INFO  L136   FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace
[2022-03-18 04:26:49,002 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [529259972]
[2022-03-18 04:26:49,002 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [529259972] provided 1 perfect and 0 imperfect interpolant sequences
[2022-03-18 04:26:49,002 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-03-18 04:26:49,003 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9
[2022-03-18 04:26:49,003 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533243778]
[2022-03-18 04:26:49,003 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-03-18 04:26:49,003 INFO  L554      AbstractCegarLoop]: INTERPOLANT automaton has 9 states
[2022-03-18 04:26:49,004 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION
[2022-03-18 04:26:49,004 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2022-03-18 04:26:49,005 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72
[2022-03-18 04:26:49,006 INFO  L87              Difference]: Start difference. First operand 29 states and 30 transitions. Second operand  has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3)
[2022-03-18 04:26:49,071 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-03-18 04:26:49,071 INFO  L93              Difference]: Finished difference Result 29 states and 30 transitions.
[2022-03-18 04:26:49,072 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2022-03-18 04:26:49,072 INFO  L78                 Accepts]: Start accepts. Automaton has  has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24
[2022-03-18 04:26:49,072 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-03-18 04:26:49,072 INFO  L225             Difference]: With dead ends: 29
[2022-03-18 04:26:49,073 INFO  L226             Difference]: Without dead ends: 0
[2022-03-18 04:26:49,073 INFO  L911         BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90
[2022-03-18 04:26:49,074 INFO  L912         BasicCegarLoop]: 18 mSDtfsCounter, 10 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-03-18 04:26:49,074 INFO  L913         BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 106 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-03-18 04:26:49,074 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 0 states.
[2022-03-18 04:26:49,075 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0.
[2022-03-18 04:26:49,075 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-03-18 04:26:49,075 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions.
[2022-03-18 04:26:49,075 INFO  L78                 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 24
[2022-03-18 04:26:49,075 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-03-18 04:26:49,075 INFO  L478      AbstractCegarLoop]: Abstraction has 0 states and 0 transitions.
[2022-03-18 04:26:49,075 INFO  L479      AbstractCegarLoop]: INTERPOLANT automaton has  has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3)
[2022-03-18 04:26:49,075 INFO  L276                IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions.
[2022-03-18 04:26:49,075 INFO  L282                IsEmpty]: Finished isEmpty. No accepting run.
[2022-03-18 04:26:49,087 INFO  L788   garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining)
[2022-03-18 04:26:49,112 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0
[2022-03-18 04:26:49,288 WARN  L460      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2
[2022-03-18 04:26:49,290 INFO  L343    DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.
[2022-03-18 04:26:49,399 INFO  L882   garLoopResultBuilder]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed.
[2022-03-18 04:26:49,399 INFO  L882   garLoopResultBuilder]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed.
[2022-03-18 04:26:49,399 INFO  L882   garLoopResultBuilder]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed.
[2022-03-18 04:26:49,400 INFO  L885   garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 6 8) the Hoare annotation is: true
[2022-03-18 04:26:49,400 INFO  L885   garLoopResultBuilder]: At program point L7(line 7) the Hoare annotation is: true
[2022-03-18 04:26:49,400 INFO  L885   garLoopResultBuilder]: At program point L7-2(lines 6 8) the Hoare annotation is: true
[2022-03-18 04:26:49,400 INFO  L885   garLoopResultBuilder]: At program point assume_abort_if_notEXIT(lines 6 8) the Hoare annotation is: true
[2022-03-18 04:26:49,400 INFO  L885   garLoopResultBuilder]: At program point mainENTRY(lines 17 40) the Hoare annotation is: true
[2022-03-18 04:26:49,400 INFO  L878   garLoopResultBuilder]: At program point L28(line 28) the Hoare annotation is: (and (= main_~x~0 0) (= main_~y~0 0))
[2022-03-18 04:26:49,400 INFO  L878   garLoopResultBuilder]: At program point L28-1(lines 27 36) the Hoare annotation is: (and (= main_~x~0 0) (= main_~y~0 0))
[2022-03-18 04:26:49,400 INFO  L878   garLoopResultBuilder]: At program point L27-2(lines 27 36) the Hoare annotation is: (or (and (= main_~x~0 0) (= main_~y~0 0)) (and (= (+ (- 1) (* (- 2) main_~x~0) (let ((.cse0 (+ (- 1) main_~y~0))) (* .cse0 .cse0)) (* main_~y~0 3)) 0) (< main_~c~0 (+ main_~k~0 1))))
[2022-03-18 04:26:49,400 INFO  L885   garLoopResultBuilder]: At program point mainEXIT(lines 17 40) the Hoare annotation is: true
[2022-03-18 04:26:49,401 INFO  L878   garLoopResultBuilder]: At program point L27-3(lines 27 36) the Hoare annotation is: (and (= main_~x~0 0) (= main_~y~0 0))
[2022-03-18 04:26:49,401 INFO  L885   garLoopResultBuilder]: At program point L21(line 21) the Hoare annotation is: true
[2022-03-18 04:26:49,401 INFO  L885   garLoopResultBuilder]: At program point L21-1(line 21) the Hoare annotation is: true
[2022-03-18 04:26:49,401 INFO  L885   garLoopResultBuilder]: At program point mainFINAL(lines 17 40) the Hoare annotation is: true
[2022-03-18 04:26:49,401 INFO  L885   garLoopResultBuilder]: At program point L37(line 37) the Hoare annotation is: true
[2022-03-18 04:26:49,401 INFO  L885   garLoopResultBuilder]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true
[2022-03-18 04:26:49,401 INFO  L878   garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|))
[2022-03-18 04:26:49,401 INFO  L885   garLoopResultBuilder]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true
[2022-03-18 04:26:49,401 INFO  L885   garLoopResultBuilder]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true
[2022-03-18 04:26:49,401 INFO  L885   garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true
[2022-03-18 04:26:49,401 INFO  L885   garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true
[2022-03-18 04:26:49,401 INFO  L885   garLoopResultBuilder]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true
[2022-03-18 04:26:49,402 INFO  L885   garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 9 15) the Hoare annotation is: true
[2022-03-18 04:26:49,402 INFO  L878   garLoopResultBuilder]: At program point L11(lines 11 12) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|))
[2022-03-18 04:26:49,402 INFO  L878   garLoopResultBuilder]: At program point L10(lines 10 13) the Hoare annotation is: (and (or (not (<= 1 |__VERIFIER_assert_#in~cond|)) (<= 1 __VERIFIER_assert_~cond)) (or (not (= |__VERIFIER_assert_#in~cond| 1)) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)))
[2022-03-18 04:26:49,402 INFO  L878   garLoopResultBuilder]: At program point __VERIFIER_assertEXIT(lines 9 15) the Hoare annotation is: (or (not (= |__VERIFIER_assert_#in~cond| 1)) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond))
[2022-03-18 04:26:49,402 INFO  L878   garLoopResultBuilder]: At program point L10-2(lines 9 15) the Hoare annotation is: (or (not (= |__VERIFIER_assert_#in~cond| 1)) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond))
[2022-03-18 04:26:49,402 INFO  L878   garLoopResultBuilder]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|))
[2022-03-18 04:26:49,404 INFO  L718         BasicCegarLoop]: Path program histogram: [2, 2, 1, 1]
[2022-03-18 04:26:49,405 INFO  L180   ceAbstractionStarter]: Computing trace abstraction results
[2022-03-18 04:26:49,414 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 04:26:49 BoogieIcfgContainer
[2022-03-18 04:26:49,414 INFO  L132        PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2022-03-18 04:26:49,414 INFO  L158              Benchmark]: Toolchain (without parser) took 88717.98ms. Allocated memory was 204.5MB in the beginning and 245.4MB in the end (delta: 40.9MB). Free memory was 153.9MB in the beginning and 148.8MB in the end (delta: 5.2MB). Peak memory consumption was 46.4MB. Max. memory is 8.0GB.
[2022-03-18 04:26:49,415 INFO  L158              Benchmark]: CDTParser took 0.16ms. Allocated memory is still 204.5MB. Free memory is still 170.6MB. There was no memory consumed. Max. memory is 8.0GB.
[2022-03-18 04:26:49,415 INFO  L158              Benchmark]: CACSL2BoogieTranslator took 181.01ms. Allocated memory is still 204.5MB. Free memory was 153.8MB in the beginning and 180.4MB in the end (delta: -26.6MB). Peak memory consumption was 9.6MB. Max. memory is 8.0GB.
[2022-03-18 04:26:49,415 INFO  L158              Benchmark]: Boogie Preprocessor took 31.50ms. Allocated memory is still 204.5MB. Free memory was 180.4MB in the beginning and 179.0MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB.
[2022-03-18 04:26:49,415 INFO  L158              Benchmark]: RCFGBuilder took 265.29ms. Allocated memory is still 204.5MB. Free memory was 179.0MB in the beginning and 169.0MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB.
[2022-03-18 04:26:49,416 INFO  L158              Benchmark]: TraceAbstraction took 88222.54ms. Allocated memory was 204.5MB in the beginning and 245.4MB in the end (delta: 40.9MB). Free memory was 168.6MB in the beginning and 148.8MB in the end (delta: 19.8MB). Peak memory consumption was 61.0MB. Max. memory is 8.0GB.
[2022-03-18 04:26:49,417 INFO  L339   ainManager$Toolchain]: #######################  End [Toolchain 1] #######################
 --- Results ---
 * Results from de.uni_freiburg.informatik.ultimate.core:
  - StatisticsResult: Toolchain Benchmarks
    Benchmark results are:
 * CDTParser took 0.16ms. Allocated memory is still 204.5MB. Free memory is still 170.6MB. There was no memory consumed. Max. memory is 8.0GB.
 * CACSL2BoogieTranslator took 181.01ms. Allocated memory is still 204.5MB. Free memory was 153.8MB in the beginning and 180.4MB in the end (delta: -26.6MB). Peak memory consumption was 9.6MB. Max. memory is 8.0GB.
 * Boogie Preprocessor took 31.50ms. Allocated memory is still 204.5MB. Free memory was 180.4MB in the beginning and 179.0MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB.
 * RCFGBuilder took 265.29ms. Allocated memory is still 204.5MB. Free memory was 179.0MB in the beginning and 169.0MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB.
 * TraceAbstraction took 88222.54ms. Allocated memory was 204.5MB in the beginning and 245.4MB in the end (delta: 40.9MB). Free memory was 168.6MB in the beginning and 148.8MB in the end (delta: 19.8MB). Peak memory consumption was 61.0MB. 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
  - PositiveResult [Line: 12]: call to reach_error is unreachable
    For all program executions holds that call to reach_error is unreachable at this location
  - StatisticsResult: Ultimate Automizer benchmark data
    CFG has 6 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 88.2s, OverallIterations: 3, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 36 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 31 mSDsluCounter, 210 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 147 mSDsCounter, 10 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 63 IncrementalHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 10 mSolverCounterUnsat, 63 mSDtfsCounter, 63 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred in iteration=2, InterpolantAutomatonStates: 15, 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, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 27 LocationsWithAnnotation, 57 PreInvPairs, 85 NumberOfFragments, 117 HoareAnnotationTreeSize, 57 FomulaSimplifications, 12 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 27 FomulaSimplificationsInter, 142 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, 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
  - AllSpecificationsHoldResult: All specifications hold
    1 specifications checked. All of them hold
  - InvariantResult [Line: 27]: Loop Invariant
    Derived loop invariant: (x == 0 && y == 0) || (-1 + -2 * x + (-1 + y) * (-1 + y) + y * 3 == 0 && c < k + 1)
  - ProcedureContractResult [Line: 6]: Procedure Contract for assume_abort_if_not
    Derived contract for procedure assume_abort_if_not: 1
  - ProcedureContractResult [Line: 17]: Procedure Contract for main
    Derived contract for procedure main: 1
  - ProcedureContractResult [Line: 9]: Procedure Contract for __VERIFIER_assert
    Derived contract for procedure __VERIFIER_assert: !(\old(cond) == 1) || \old(cond) == cond
RESULT: Ultimate proved your program to be correct!
[2022-03-18 04:26:49,429 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...