/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/cohencu-ll_unwindbound1.c


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


This is Ultimate 0.2.2-dev-d966a43
[2022-01-31 23:32:35,496 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2022-01-31 23:32:35,498 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2022-01-31 23:32:35,579 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2022-01-31 23:32:35,580 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2022-01-31 23:32:35,584 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2022-01-31 23:32:35,586 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2022-01-31 23:32:35,589 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2022-01-31 23:32:35,591 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2022-01-31 23:32:35,595 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2022-01-31 23:32:35,596 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2022-01-31 23:32:35,597 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2022-01-31 23:32:35,597 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2022-01-31 23:32:35,599 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2022-01-31 23:32:35,600 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2022-01-31 23:32:35,603 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2022-01-31 23:32:35,603 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2022-01-31 23:32:35,604 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2022-01-31 23:32:35,605 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2022-01-31 23:32:35,609 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2022-01-31 23:32:35,610 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2022-01-31 23:32:35,611 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2022-01-31 23:32:35,612 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2022-01-31 23:32:35,612 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2022-01-31 23:32:35,615 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2022-01-31 23:32:35,616 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2022-01-31 23:32:35,616 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2022-01-31 23:32:35,617 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2022-01-31 23:32:35,618 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2022-01-31 23:32:35,619 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2022-01-31 23:32:35,619 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2022-01-31 23:32:35,619 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2022-01-31 23:32:35,621 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2022-01-31 23:32:35,621 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2022-01-31 23:32:35,623 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2022-01-31 23:32:35,623 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
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[2022-01-31 23:32:35,624 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2022-01-31 23:32:35,625 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2022-01-31 23:32:35,626 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 23:32:35,638 INFO  L113        SettingsManager]: Loading preferences was successful
[2022-01-31 23:32:35,638 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2022-01-31 23:32:35,640 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2022-01-31 23:32:35,640 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2022-01-31 23:32:35,640 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2022-01-31 23:32:35,640 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2022-01-31 23:32:35,640 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2022-01-31 23:32:35,640 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2022-01-31 23:32:35,641 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2022-01-31 23:32:35,641 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2022-01-31 23:32:35,641 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2022-01-31 23:32:35,642 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2022-01-31 23:32:35,642 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2022-01-31 23:32:35,642 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2022-01-31 23:32:35,642 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2022-01-31 23:32:35,642 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-01-31 23:32:35,642 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2022-01-31 23:32:35,642 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=AcceleratedInterpolation
[2022-01-31 23:32:35,642 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2022-01-31 23:32:35,642 INFO  L138        SettingsManager]:  * Loop acceleration method that is used by accelerated interpolation=QVASR
[2022-01-31 23:32:35,642 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN;
[2022-01-31 23:32:35,833 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2022-01-31 23:32:35,857 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2022-01-31 23:32:35,858 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2022-01-31 23:32:35,859 INFO  L271        PluginConnector]: Initializing CDTParser...
[2022-01-31 23:32:35,862 INFO  L275        PluginConnector]: CDTParser initialized
[2022-01-31 23:32:35,863 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_unwindbound1.c
[2022-01-31 23:32:35,916 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/05787cae4/0569401ee55341c2bbca197c844d4e01/FLAGb86d36a45
[2022-01-31 23:32:36,271 INFO  L306              CDTParser]: Found 1 translation units.
[2022-01-31 23:32:36,272 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_unwindbound1.c
[2022-01-31 23:32:36,280 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/05787cae4/0569401ee55341c2bbca197c844d4e01/FLAGb86d36a45
[2022-01-31 23:32:36,303 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/05787cae4/0569401ee55341c2bbca197c844d4e01
[2022-01-31 23:32:36,305 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2022-01-31 23:32:36,307 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2022-01-31 23:32:36,309 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2022-01-31 23:32:36,309 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2022-01-31 23:32:36,311 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2022-01-31 23:32:36,312 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 11:32:36" (1/1) ...
[2022-01-31 23:32:36,312 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29082b60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:32:36, skipping insertion in model container
[2022-01-31 23:32:36,312 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 11:32:36" (1/1) ...
[2022-01-31 23:32:36,317 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2022-01-31 23:32:36,330 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2022-01-31 23:32:36,464 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/cohencu-ll_unwindbound1.c[588,601]
[2022-01-31 23:32:36,491 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-01-31 23:32:36,497 INFO  L203         MainTranslator]: Completed pre-run
[2022-01-31 23:32:36,505 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/cohencu-ll_unwindbound1.c[588,601]
[2022-01-31 23:32:36,511 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-01-31 23:32:36,520 INFO  L208         MainTranslator]: Completed translation
[2022-01-31 23:32:36,520 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:32:36 WrapperNode
[2022-01-31 23:32:36,520 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2022-01-31 23:32:36,521 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2022-01-31 23:32:36,521 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2022-01-31 23:32:36,521 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2022-01-31 23:32:36,529 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:32:36" (1/1) ...
[2022-01-31 23:32:36,529 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:32:36" (1/1) ...
[2022-01-31 23:32:36,533 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:32:36" (1/1) ...
[2022-01-31 23:32:36,533 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:32:36" (1/1) ...
[2022-01-31 23:32:36,536 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:32:36" (1/1) ...
[2022-01-31 23:32:36,539 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:32:36" (1/1) ...
[2022-01-31 23:32:36,539 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:32:36" (1/1) ...
[2022-01-31 23:32:36,540 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2022-01-31 23:32:36,541 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2022-01-31 23:32:36,541 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2022-01-31 23:32:36,543 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2022-01-31 23:32:36,543 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:32:36" (1/1) ...
[2022-01-31 23:32:36,549 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-01-31 23:32:36,556 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-31 23:32:36,564 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 23:32:36,579 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 23:32:36,588 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2022-01-31 23:32:36,588 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2022-01-31 23:32:36,588 INFO  L138     BoogieDeclarations]: Found implementation of procedure reach_error
[2022-01-31 23:32:36,588 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2022-01-31 23:32:36,588 INFO  L138     BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2022-01-31 23:32:36,588 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2022-01-31 23:32:36,588 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2022-01-31 23:32:36,588 INFO  L130     BoogieDeclarations]: Found specification of procedure __assert_fail
[2022-01-31 23:32:36,588 INFO  L130     BoogieDeclarations]: Found specification of procedure reach_error
[2022-01-31 23:32:36,588 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2022-01-31 23:32:36,588 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ushort
[2022-01-31 23:32:36,588 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2022-01-31 23:32:36,589 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2022-01-31 23:32:36,589 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2022-01-31 23:32:36,589 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2022-01-31 23:32:36,589 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2022-01-31 23:32:36,589 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2022-01-31 23:32:36,589 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2022-01-31 23:32:36,589 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2022-01-31 23:32:36,589 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2022-01-31 23:32:36,628 INFO  L234             CfgBuilder]: Building ICFG
[2022-01-31 23:32:36,629 INFO  L260             CfgBuilder]: Building CFG for each procedure with an implementation
[2022-01-31 23:32:36,752 INFO  L275             CfgBuilder]: Performing block encoding
[2022-01-31 23:32:36,774 INFO  L294             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2022-01-31 23:32:36,774 INFO  L299             CfgBuilder]: Removed 1 assume(true) statements.
[2022-01-31 23:32:36,776 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 11:32:36 BoogieIcfgContainer
[2022-01-31 23:32:36,776 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2022-01-31 23:32:36,777 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2022-01-31 23:32:36,777 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2022-01-31 23:32:36,779 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2022-01-31 23:32:36,779 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 11:32:36" (1/3) ...
[2022-01-31 23:32:36,780 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@655a0005 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 11:32:36, skipping insertion in model container
[2022-01-31 23:32:36,780 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:32:36" (2/3) ...
[2022-01-31 23:32:36,780 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@655a0005 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 11:32:36, skipping insertion in model container
[2022-01-31 23:32:36,780 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 11:32:36" (3/3) ...
[2022-01-31 23:32:36,781 INFO  L111   eAbstractionObserver]: Analyzing ICFG cohencu-ll_unwindbound1.c
[2022-01-31 23:32:36,784 INFO  L205   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION
[2022-01-31 23:32:36,784 INFO  L164   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2022-01-31 23:32:36,812 INFO  L338      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2022-01-31 23:32:36,816 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 23:32:36,816 INFO  L340      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2022-01-31 23:32:36,825 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 31 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13)
[2022-01-31 23:32:36,830 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 12
[2022-01-31 23:32:36,830 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-31 23:32:36,830 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-31 23:32:36,831 INFO  L402      AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-31 23:32:36,834 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-31 23:32:36,834 INFO  L85        PathProgramCache]: Analyzing trace with hash 1839589780, now seen corresponding path program 1 times
[2022-01-31 23:32:36,839 INFO  L121   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-01-31 23:32:36,840 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [943211946]
[2022-01-31 23:32:36,840 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-31 23:32:36,848 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-31 23:32:36,885 INFO  L248   tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2022-01-31 23:32:36,952 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-31 23:32:37,023 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-01-31 23:32:37,026 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-31 23:32:37,035 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 23:32:37,036 INFO  L139   FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-01-31 23:32:37,036 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [943211946]
[2022-01-31 23:32:37,037 INFO  L160   FreeRefinementEngine]: IpTcStrategyModulePreferences [943211946] provided 1 perfect and 0 imperfect interpolant sequences
[2022-01-31 23:32:37,037 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-01-31 23:32:37,037 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2022-01-31 23:32:37,038 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276774327]
[2022-01-31 23:32:37,039 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-31 23:32:37,041 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-01-31 23:32:37,041 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-01-31 23:32:37,064 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-01-31 23:32:37,065 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-01-31 23:32:37,067 INFO  L87              Difference]: Start difference. First operand  has 31 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand  has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2022-01-31 23:32:37,187 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-31 23:32:37,187 INFO  L93              Difference]: Finished difference Result 57 states and 95 transitions.
[2022-01-31 23:32:37,188 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-01-31 23:32:37,189 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11
[2022-01-31 23:32:37,189 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-31 23:32:37,195 INFO  L225             Difference]: With dead ends: 57
[2022-01-31 23:32:37,195 INFO  L226             Difference]: Without dead ends: 27
[2022-01-31 23:32:37,198 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-01-31 23:32:37,200 INFO  L933         BasicCegarLoop]: 41 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-01-31 23:32:37,200 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 45 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-01-31 23:32:37,216 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 27 states.
[2022-01-31 23:32:37,238 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26.
[2022-01-31 23:32:37,240 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 26 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 13 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11)
[2022-01-31 23:32:37,242 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions.
[2022-01-31 23:32:37,243 INFO  L78                 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 11
[2022-01-31 23:32:37,243 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-31 23:32:37,243 INFO  L470      AbstractCegarLoop]: Abstraction has 26 states and 37 transitions.
[2022-01-31 23:32:37,243 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2022-01-31 23:32:37,244 INFO  L276                IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions.
[2022-01-31 23:32:37,244 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 13
[2022-01-31 23:32:37,244 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-31 23:32:37,244 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-31 23:32:37,244 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2022-01-31 23:32:37,245 INFO  L402      AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-31 23:32:37,245 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-31 23:32:37,245 INFO  L85        PathProgramCache]: Analyzing trace with hash 660459433, now seen corresponding path program 1 times
[2022-01-31 23:32:37,245 INFO  L121   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-01-31 23:32:37,246 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1601114623]
[2022-01-31 23:32:37,246 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-31 23:32:37,246 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-31 23:32:37,248 INFO  L248   tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2022-01-31 23:32:37,272 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-31 23:32:37,339 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-01-31 23:32:37,343 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-31 23:32:37,350 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 23:32:37,351 INFO  L139   FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-01-31 23:32:37,351 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1601114623]
[2022-01-31 23:32:37,351 INFO  L160   FreeRefinementEngine]: IpTcStrategyModulePreferences [1601114623] provided 1 perfect and 0 imperfect interpolant sequences
[2022-01-31 23:32:37,351 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-01-31 23:32:37,351 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2022-01-31 23:32:37,351 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401739647]
[2022-01-31 23:32:37,351 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-31 23:32:37,352 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2022-01-31 23:32:37,352 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-01-31 23:32:37,353 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2022-01-31 23:32:37,353 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2022-01-31 23:32:37,355 INFO  L87              Difference]: Start difference. First operand 26 states and 37 transitions. Second operand  has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2022-01-31 23:32:37,435 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-31 23:32:37,435 INFO  L93              Difference]: Finished difference Result 40 states and 56 transitions.
[2022-01-31 23:32:37,435 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2022-01-31 23:32:37,436 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12
[2022-01-31 23:32:37,436 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-31 23:32:37,436 INFO  L225             Difference]: With dead ends: 40
[2022-01-31 23:32:37,436 INFO  L226             Difference]: Without dead ends: 28
[2022-01-31 23:32:37,437 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2022-01-31 23:32:37,438 INFO  L933         BasicCegarLoop]: 35 mSDtfsCounter, 6 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-01-31 23:32:37,438 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 69 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-01-31 23:32:37,439 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 28 states.
[2022-01-31 23:32:37,443 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28.
[2022-01-31 23:32:37,443 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 28 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 13 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11)
[2022-01-31 23:32:37,444 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 39 transitions.
[2022-01-31 23:32:37,444 INFO  L78                 Accepts]: Start accepts. Automaton has 28 states and 39 transitions. Word has length 12
[2022-01-31 23:32:37,444 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-31 23:32:37,445 INFO  L470      AbstractCegarLoop]: Abstraction has 28 states and 39 transitions.
[2022-01-31 23:32:37,445 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2022-01-31 23:32:37,445 INFO  L276                IsEmpty]: Start isEmpty. Operand 28 states and 39 transitions.
[2022-01-31 23:32:37,445 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 13
[2022-01-31 23:32:37,445 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-31 23:32:37,445 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-31 23:32:37,445 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2022-01-31 23:32:37,445 INFO  L402      AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-31 23:32:37,446 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-31 23:32:37,446 INFO  L85        PathProgramCache]: Analyzing trace with hash 662008565, now seen corresponding path program 1 times
[2022-01-31 23:32:37,446 INFO  L121   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-01-31 23:32:37,446 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1223875117]
[2022-01-31 23:32:37,446 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-31 23:32:37,447 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-31 23:32:37,448 INFO  L248   tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2022-01-31 23:32:37,459 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-31 23:32:37,511 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-01-31 23:32:37,513 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-31 23:32:37,516 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 23:32:37,516 INFO  L139   FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2022-01-31 23:32:37,517 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1223875117]
[2022-01-31 23:32:37,517 INFO  L160   FreeRefinementEngine]: IpTcStrategyModulePreferences [1223875117] provided 1 perfect and 0 imperfect interpolant sequences
[2022-01-31 23:32:37,517 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-01-31 23:32:37,517 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2022-01-31 23:32:37,517 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428984296]
[2022-01-31 23:32:37,517 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-31 23:32:37,517 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2022-01-31 23:32:37,517 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2022-01-31 23:32:37,518 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2022-01-31 23:32:37,518 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2022-01-31 23:32:37,518 INFO  L87              Difference]: Start difference. First operand 28 states and 39 transitions. Second operand  has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2022-01-31 23:32:37,628 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-31 23:32:37,629 INFO  L93              Difference]: Finished difference Result 34 states and 44 transitions.
[2022-01-31 23:32:37,629 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2022-01-31 23:32:37,629 INFO  L78                 Accepts]: Start accepts. Automaton has  has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12
[2022-01-31 23:32:37,629 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-31 23:32:37,630 INFO  L225             Difference]: With dead ends: 34
[2022-01-31 23:32:37,630 INFO  L226             Difference]: Without dead ends: 32
[2022-01-31 23:32:37,630 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90
[2022-01-31 23:32:37,631 INFO  L933         BasicCegarLoop]: 30 mSDtfsCounter, 17 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-01-31 23:32:37,631 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 73 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-01-31 23:32:37,632 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 32 states.
[2022-01-31 23:32:37,638 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32.
[2022-01-31 23:32:37,638 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 32 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11)
[2022-01-31 23:32:37,639 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions.
[2022-01-31 23:32:37,639 INFO  L78                 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 12
[2022-01-31 23:32:37,639 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-31 23:32:37,639 INFO  L470      AbstractCegarLoop]: Abstraction has 32 states and 42 transitions.
[2022-01-31 23:32:37,639 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2022-01-31 23:32:37,640 INFO  L276                IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions.
[2022-01-31 23:32:37,640 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 18
[2022-01-31 23:32:37,640 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-31 23:32:37,640 INFO  L514         BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-31 23:32:37,640 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2022-01-31 23:32:37,640 INFO  L402      AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-31 23:32:37,641 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-31 23:32:37,641 INFO  L85        PathProgramCache]: Analyzing trace with hash 2023221563, now seen corresponding path program 1 times
[2022-01-31 23:32:37,641 INFO  L121   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2022-01-31 23:32:37,641 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1745216422]
[2022-01-31 23:32:37,641 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-31 23:32:37,642 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-31 23:32:37,643 INFO  L248   tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2022-01-31 23:32:37,650 WARN  L127   FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility
[2022-01-31 23:32:37,650 INFO  L628         BasicCegarLoop]: Counterexample might be feasible
[2022-01-31 23:32:37,654 INFO  L764   garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining)
[2022-01-31 23:32:37,656 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2022-01-31 23:32:37,658 INFO  L732         BasicCegarLoop]: Path program histogram: [1, 1, 1, 1]
[2022-01-31 23:32:37,659 INFO  L180   ceAbstractionStarter]: Computing trace abstraction results
[2022-01-31 23:32:37,668 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 11:32:37 BoogieIcfgContainer
[2022-01-31 23:32:37,669 INFO  L132        PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2022-01-31 23:32:37,669 INFO  L158              Benchmark]: Toolchain (without parser) took 1361.94ms. Allocated memory was 178.3MB in the beginning and 213.9MB in the end (delta: 35.7MB). Free memory was 127.8MB in the beginning and 179.2MB in the end (delta: -51.4MB). There was no memory consumed. Max. memory is 8.0GB.
[2022-01-31 23:32:37,670 INFO  L158              Benchmark]: CDTParser took 0.12ms. Allocated memory is still 178.3MB. Free memory was 143.9MB in the beginning and 143.8MB in the end (delta: 71.4kB). There was no memory consumed. Max. memory is 8.0GB.
[2022-01-31 23:32:37,671 INFO  L158              Benchmark]: CACSL2BoogieTranslator took 211.74ms. Allocated memory is still 178.3MB. Free memory was 127.6MB in the beginning and 153.1MB in the end (delta: -25.5MB). Peak memory consumption was 10.0MB. Max. memory is 8.0GB.
[2022-01-31 23:32:37,671 INFO  L158              Benchmark]: Boogie Preprocessor took 19.67ms. Allocated memory is still 178.3MB. Free memory was 153.1MB in the beginning and 151.7MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB.
[2022-01-31 23:32:37,671 INFO  L158              Benchmark]: RCFGBuilder took 234.48ms. Allocated memory is still 178.3MB. Free memory was 151.7MB in the beginning and 140.9MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB.
[2022-01-31 23:32:37,672 INFO  L158              Benchmark]: TraceAbstraction took 891.88ms. Allocated memory was 178.3MB in the beginning and 213.9MB in the end (delta: 35.7MB). Free memory was 140.5MB in the beginning and 179.2MB in the end (delta: -38.8MB). There was no memory consumed. Max. memory is 8.0GB.
[2022-01-31 23:32:37,673 INFO  L339   ainManager$Toolchain]: #######################  End [Toolchain 1] #######################
 --- Results ---
 * Results from de.uni_freiburg.informatik.ultimate.core:
  - StatisticsResult: Toolchain Benchmarks
    Benchmark results are:
 * CDTParser took 0.12ms. Allocated memory is still 178.3MB. Free memory was 143.9MB in the beginning and 143.8MB in the end (delta: 71.4kB). There was no memory consumed. Max. memory is 8.0GB.
 * CACSL2BoogieTranslator took 211.74ms. Allocated memory is still 178.3MB. Free memory was 127.6MB in the beginning and 153.1MB in the end (delta: -25.5MB). Peak memory consumption was 10.0MB. Max. memory is 8.0GB.
 * Boogie Preprocessor took 19.67ms. Allocated memory is still 178.3MB. Free memory was 153.1MB in the beginning and 151.7MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB.
 * RCFGBuilder took 234.48ms. Allocated memory is still 178.3MB. Free memory was 151.7MB in the beginning and 140.9MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB.
 * TraceAbstraction took 891.88ms. Allocated memory was 178.3MB in the beginning and 213.9MB in the end (delta: 35.7MB). Free memory was 140.5MB in the beginning and 179.2MB in the end (delta: -38.8MB). There was no memory consumed. 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: 17]: Unable to prove that call to reach_error is unreachable
    Unable to prove that call to reach_error is unreachable
 Reason: unable to decide satisfiability of path constraint. 
Possible FailurePath: 
[L22]              int counter = 0;
[L24]              short a;
[L25]              long long n, x, y, z;
[L26]              a = __VERIFIER_nondet_ushort()
[L28]              n = 0
[L29]              x = 0
[L30]              y = 1
[L31]              z = 6
[L33]  EXPR        counter++
[L33]  COND TRUE   counter++<1
[L34]  CALL        __VERIFIER_assert(z == 6 * n + 6)
[L15]  COND FALSE  !(!(cond))
[L34]  RET         __VERIFIER_assert(z == 6 * n + 6)
[L35]  CALL        __VERIFIER_assert(y == 3 * n * n + 3 * n + 1)
[L15]  COND TRUE   !(cond)
[L17]              reach_error()

  - StatisticsResult: Ultimate Automizer benchmark data
    CFG has 6 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.8s, OverallIterations: 4, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 39 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 29 mSDsluCounter, 187 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 81 mSDsCounter, 39 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 148 IncrementalHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 39 mSolverCounterUnsat, 106 mSDtfsCounter, 148 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=3, InterpolantAutomatonStates: 17, 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, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available
RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces
[2022-01-31 23:32:37,686 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0
Received shutdown request...