/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/sqrt1-ll_valuebound50.c
--------------------------------------------------------------------------------
This is Ultimate 0.2.2-dev-7968f31
[2022-03-18 05:21:27,604 INFO L177 SettingsManager]: Resetting all preferences to default values...
[2022-03-18 05:21:27,625 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values
[2022-03-18 05:21:27,646 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2022-03-18 05:21:27,646 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2022-03-18 05:21:27,648 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2022-03-18 05:21:27,649 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2022-03-18 05:21:27,650 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values
[2022-03-18 05:21:27,652 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values
[2022-03-18 05:21:27,660 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values
[2022-03-18 05:21:27,660 INFO L181 SettingsManager]: Resetting Sifa preferences to default values
[2022-03-18 05:21:27,662 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2022-03-18 05:21:27,662 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values
[2022-03-18 05:21:27,664 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values
[2022-03-18 05:21:27,665 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2022-03-18 05:21:27,666 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values
[2022-03-18 05:21:27,667 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2022-03-18 05:21:27,667 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2022-03-18 05:21:27,672 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2022-03-18 05:21:27,677 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values
[2022-03-18 05:21:27,679 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values
[2022-03-18 05:21:27,680 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2022-03-18 05:21:27,680 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values
[2022-03-18 05:21:27,682 INFO L181 SettingsManager]: Resetting Referee preferences to default values
[2022-03-18 05:21:27,684 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values
[2022-03-18 05:21:27,687 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2022-03-18 05:21:27,687 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2022-03-18 05:21:27,687 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values
[2022-03-18 05:21:27,688 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values
[2022-03-18 05:21:27,688 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values
[2022-03-18 05:21:27,688 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring...
[2022-03-18 05:21:27,689 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values
[2022-03-18 05:21:27,689 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2022-03-18 05:21:27,689 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values
[2022-03-18 05:21:27,690 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values
[2022-03-18 05:21:27,690 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2022-03-18 05:21:27,690 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values
[2022-03-18 05:21:27,691 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2022-03-18 05:21:27,691 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring...
[2022-03-18 05:21:27,691 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values
[2022-03-18 05:21:27,692 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values
[2022-03-18 05:21:27,695 INFO L188 SettingsManager]: Finished resetting all preferences to default values...
[2022-03-18 05:21:27,696 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 05:21:27,703 INFO L113 SettingsManager]: Loading preferences was successful
[2022-03-18 05:21:27,704 INFO L115 SettingsManager]: Preferences different from defaults after loading the file:
[2022-03-18 05:21:27,705 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2022-03-18 05:21:27,705 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true
[2022-03-18 05:21:27,705 INFO L138 SettingsManager]: * Check division by zero=IGNORE
[2022-03-18 05:21:27,705 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE
[2022-03-18 05:21:27,705 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE
[2022-03-18 05:21:27,705 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE
[2022-03-18 05:21:27,705 INFO L138 SettingsManager]: * Check if freed pointer was valid=false
[2022-03-18 05:21:27,706 INFO L138 SettingsManager]: * Use constant arrays=true
[2022-03-18 05:21:27,706 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE
[2022-03-18 05:21:27,706 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2022-03-18 05:21:27,706 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements
[2022-03-18 05:21:27,706 INFO L138 SettingsManager]: * To the following directory=./dump/
[2022-03-18 05:21:27,706 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode
[2022-03-18 05:21:27,706 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-03-18 05:21:27,706 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2022-03-18 05:21:27,706 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation
[2022-03-18 05:21:27,707 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION
[2022-03-18 05:21:27,707 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL
[2022-03-18 05:21:27,707 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2022-03-18 05:21:27,707 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR
[2022-03-18 05:21:27,707 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN;
[2022-03-18 05:21:27,883 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp
[2022-03-18 05:21:27,901 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2022-03-18 05:21:27,903 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2022-03-18 05:21:27,903 INFO L271 PluginConnector]: Initializing CDTParser...
[2022-03-18 05:21:27,905 INFO L275 PluginConnector]: CDTParser initialized
[2022-03-18 05:21:27,906 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_valuebound50.c
[2022-03-18 05:21:27,954 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f80bae92/d9ad4d195fa845cabbbe0fdc2ba78ddb/FLAGfc1108809
[2022-03-18 05:21:28,332 INFO L306 CDTParser]: Found 1 translation units.
[2022-03-18 05:21:28,332 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_valuebound50.c
[2022-03-18 05:21:28,336 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f80bae92/d9ad4d195fa845cabbbe0fdc2ba78ddb/FLAGfc1108809
[2022-03-18 05:21:28,346 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f80bae92/d9ad4d195fa845cabbbe0fdc2ba78ddb
[2022-03-18 05:21:28,348 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2022-03-18 05:21:28,350 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements.
[2022-03-18 05:21:28,353 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2022-03-18 05:21:28,353 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator...
[2022-03-18 05:21:28,356 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized
[2022-03-18 05:21:28,356 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 05:21:28" (1/1) ...
[2022-03-18 05:21:28,357 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3365232a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:21:28, skipping insertion in model container
[2022-03-18 05:21:28,357 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 05:21:28" (1/1) ...
[2022-03-18 05:21:28,362 INFO L145 MainTranslator]: Starting translation in SV-COMP mode
[2022-03-18 05:21:28,375 INFO L178 MainTranslator]: Built tables and reachable declarations
[2022-03-18 05:21:28,479 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/sqrt1-ll_valuebound50.c[520,533]
[2022-03-18 05:21:28,494 INFO L210 PostProcessor]: Analyzing one entry point: main
[2022-03-18 05:21:28,499 INFO L203 MainTranslator]: Completed pre-run
[2022-03-18 05:21:28,506 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/sqrt1-ll_valuebound50.c[520,533]
[2022-03-18 05:21:28,510 INFO L210 PostProcessor]: Analyzing one entry point: main
[2022-03-18 05:21:28,517 INFO L208 MainTranslator]: Completed translation
[2022-03-18 05:21:28,517 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:21:28 WrapperNode
[2022-03-18 05:21:28,518 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2022-03-18 05:21:28,518 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2022-03-18 05:21:28,518 INFO L271 PluginConnector]: Initializing Boogie Preprocessor...
[2022-03-18 05:21:28,518 INFO L275 PluginConnector]: Boogie Preprocessor initialized
[2022-03-18 05:21:28,525 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:21:28" (1/1) ...
[2022-03-18 05:21:28,525 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:21:28" (1/1) ...
[2022-03-18 05:21:28,529 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:21:28" (1/1) ...
[2022-03-18 05:21:28,529 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:21:28" (1/1) ...
[2022-03-18 05:21:28,531 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:21:28" (1/1) ...
[2022-03-18 05:21:28,534 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:21:28" (1/1) ...
[2022-03-18 05:21:28,534 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:21:28" (1/1) ...
[2022-03-18 05:21:28,535 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2022-03-18 05:21:28,536 INFO L113 PluginConnector]: ------------------------RCFGBuilder----------------------------
[2022-03-18 05:21:28,536 INFO L271 PluginConnector]: Initializing RCFGBuilder...
[2022-03-18 05:21:28,536 INFO L275 PluginConnector]: RCFGBuilder initialized
[2022-03-18 05:21:28,536 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:21:28" (1/1) ...
[2022-03-18 05:21:28,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-03-18 05:21:28,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-03-18 05:21:28,558 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 05:21:28,565 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 05:21:28,589 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2022-03-18 05:21:28,590 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2022-03-18 05:21:28,590 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error
[2022-03-18 05:21:28,590 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2022-03-18 05:21:28,590 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2022-03-18 05:21:28,591 INFO L138 BoogieDeclarations]: Found implementation of procedure main
[2022-03-18 05:21:28,591 INFO L130 BoogieDeclarations]: Found specification of procedure abort
[2022-03-18 05:21:28,591 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail
[2022-03-18 05:21:28,591 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error
[2022-03-18 05:21:28,591 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2022-03-18 05:21:28,592 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2022-03-18 05:21:28,592 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2022-03-18 05:21:28,592 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2022-03-18 05:21:28,592 INFO L130 BoogieDeclarations]: Found specification of procedure main
[2022-03-18 05:21:28,593 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2022-03-18 05:21:28,594 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int
[2022-03-18 05:21:28,594 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2022-03-18 05:21:28,595 INFO L130 BoogieDeclarations]: Found specification of procedure write~int
[2022-03-18 05:21:28,595 INFO L130 BoogieDeclarations]: Found specification of procedure read~int
[2022-03-18 05:21:28,595 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2022-03-18 05:21:28,638 INFO L234 CfgBuilder]: Building ICFG
[2022-03-18 05:21:28,639 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation
[2022-03-18 05:21:28,759 INFO L275 CfgBuilder]: Performing block encoding
[2022-03-18 05:21:28,777 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2022-03-18 05:21:28,778 INFO L299 CfgBuilder]: Removed 1 assume(true) statements.
[2022-03-18 05:21:28,779 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 05:21:28 BoogieIcfgContainer
[2022-03-18 05:21:28,779 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2022-03-18 05:21:28,780 INFO L113 PluginConnector]: ------------------------TraceAbstraction----------------------------
[2022-03-18 05:21:28,780 INFO L271 PluginConnector]: Initializing TraceAbstraction...
[2022-03-18 05:21:28,795 INFO L275 PluginConnector]: TraceAbstraction initialized
[2022-03-18 05:21:28,795 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 05:21:28" (1/3) ...
[2022-03-18 05:21:28,796 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66cc5ded and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 05:21:28, skipping insertion in model container
[2022-03-18 05:21:28,796 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:21:28" (2/3) ...
[2022-03-18 05:21:28,796 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66cc5ded and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 05:21:28, skipping insertion in model container
[2022-03-18 05:21:28,796 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 05:21:28" (3/3) ...
[2022-03-18 05:21:28,797 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt1-ll_valuebound50.c
[2022-03-18 05:21:28,800 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2022-03-18 05:21:28,801 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2022-03-18 05:21:28,861 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2022-03-18 05:21:28,865 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 05:21:28,866 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2022-03-18 05:21:28,874 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9)
[2022-03-18 05:21:28,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18
[2022-03-18 05:21:28,880 INFO L492 BasicCegarLoop]: Found error trace
[2022-03-18 05:21:28,880 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 05:21:28,881 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-03-18 05:21:28,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-03-18 05:21:28,892 INFO L85 PathProgramCache]: Analyzing trace with hash 326851384, now seen corresponding path program 1 times
[2022-03-18 05:21:28,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION
[2022-03-18 05:21:28,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1913970673]
[2022-03-18 05:21:28,925 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2022-03-18 05:21:28,925 INFO L85 PathProgramCache]: Analyzing trace with hash 326851384, now seen corresponding path program 2 times
[2022-03-18 05:21:28,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-03-18 05:21:28,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187855706]
[2022-03-18 05:21:28,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-03-18 05:21:28,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-03-18 05:21:29,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-03-18 05:21:29,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-03-18 05:21:29,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-03-18 05:21:29,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-03-18 05:21:29,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-03-18 05:21:29,096 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 05:21:29,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-03-18 05:21:29,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187855706]
[2022-03-18 05:21:29,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187855706] provided 1 perfect and 0 imperfect interpolant sequences
[2022-03-18 05:21:29,097 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-03-18 05:21:29,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2022-03-18 05:21:29,099 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace
[2022-03-18 05:21:29,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1913970673]
[2022-03-18 05:21:29,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1913970673] provided 1 perfect and 0 imperfect interpolant sequences
[2022-03-18 05:21:29,100 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-03-18 05:21:29,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2022-03-18 05:21:29,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478775447]
[2022-03-18 05:21:29,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-03-18 05:21:29,104 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-03-18 05:21:29,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION
[2022-03-18 05:21:29,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-03-18 05:21:29,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-03-18 05:21:29,127 INFO L87 Difference]: Start difference. First operand has 31 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) 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 05:21:29,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-03-18 05:21:29,195 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions.
[2022-03-18 05:21:29,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states.
[2022-03-18 05:21:29,197 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 05:21:29,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-03-18 05:21:29,204 INFO L225 Difference]: With dead ends: 53
[2022-03-18 05:21:29,205 INFO L226 Difference]: Without dead ends: 26
[2022-03-18 05:21:29,207 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 05:21:29,211 INFO L912 BasicCegarLoop]: 29 mSDtfsCounter, 15 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-03-18 05:21:29,212 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 32 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-03-18 05:21:29,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states.
[2022-03-18 05:21:29,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26.
[2022-03-18 05:21:29,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7)
[2022-03-18 05:21:29,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions.
[2022-03-18 05:21:29,252 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 17
[2022-03-18 05:21:29,253 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-03-18 05:21:29,253 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions.
[2022-03-18 05:21:29,253 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 05:21:29,253 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions.
[2022-03-18 05:21:29,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18
[2022-03-18 05:21:29,255 INFO L492 BasicCegarLoop]: Found error trace
[2022-03-18 05:21:29,255 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 05:21:29,255 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2022-03-18 05:21:29,256 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-03-18 05:21:29,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-03-18 05:21:29,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1008578050, now seen corresponding path program 1 times
[2022-03-18 05:21:29,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION
[2022-03-18 05:21:29,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [219886028]
[2022-03-18 05:21:29,264 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2022-03-18 05:21:29,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1008578050, now seen corresponding path program 2 times
[2022-03-18 05:21:29,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-03-18 05:21:29,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281694519]
[2022-03-18 05:21:29,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-03-18 05:21:29,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-03-18 05:21:29,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-03-18 05:21:29,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-03-18 05:21:29,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-03-18 05:21:29,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-03-18 05:21:29,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-03-18 05:21:29,372 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 05:21:29,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-03-18 05:21:29,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281694519]
[2022-03-18 05:21:29,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281694519] provided 1 perfect and 0 imperfect interpolant sequences
[2022-03-18 05:21:29,373 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-03-18 05:21:29,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2022-03-18 05:21:29,373 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace
[2022-03-18 05:21:29,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [219886028]
[2022-03-18 05:21:29,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [219886028] provided 1 perfect and 0 imperfect interpolant sequences
[2022-03-18 05:21:29,374 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-03-18 05:21:29,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2022-03-18 05:21:29,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737324039]
[2022-03-18 05:21:29,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-03-18 05:21:29,375 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2022-03-18 05:21:29,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION
[2022-03-18 05:21:29,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2022-03-18 05:21:29,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2022-03-18 05:21:29,375 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 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 05:21:29,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-03-18 05:21:29,545 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions.
[2022-03-18 05:21:29,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states.
[2022-03-18 05:21:29,546 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 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 05:21:29,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-03-18 05:21:29,546 INFO L225 Difference]: With dead ends: 40
[2022-03-18 05:21:29,547 INFO L226 Difference]: Without dead ends: 38
[2022-03-18 05:21:29,547 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90
[2022-03-18 05:21:29,548 INFO L912 BasicCegarLoop]: 22 mSDtfsCounter, 25 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-03-18 05:21:29,548 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 39 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-03-18 05:21:29,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states.
[2022-03-18 05:21:29,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36.
[2022-03-18 05:21:29,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 20 states have internal predecessors, (21), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11)
[2022-03-18 05:21:29,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions.
[2022-03-18 05:21:29,557 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 17
[2022-03-18 05:21:29,557 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-03-18 05:21:29,558 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions.
[2022-03-18 05:21:29,558 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 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 05:21:29,558 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions.
[2022-03-18 05:21:29,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23
[2022-03-18 05:21:29,558 INFO L492 BasicCegarLoop]: Found error trace
[2022-03-18 05:21:29,558 INFO L500 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-03-18 05:21:29,559 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2022-03-18 05:21:29,559 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-03-18 05:21:29,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-03-18 05:21:29,559 INFO L85 PathProgramCache]: Analyzing trace with hash -789682422, now seen corresponding path program 1 times
[2022-03-18 05:21:29,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION
[2022-03-18 05:21:29,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1156651487]
[2022-03-18 05:21:29,560 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2022-03-18 05:21:29,560 INFO L85 PathProgramCache]: Analyzing trace with hash -789682422, now seen corresponding path program 2 times
[2022-03-18 05:21:29,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-03-18 05:21:29,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023907114]
[2022-03-18 05:21:29,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-03-18 05:21:29,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-03-18 05:21:29,569 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-03-18 05:21:29,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [860138698]
[2022-03-18 05:21:29,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2022-03-18 05:21:29,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-03-18 05:21:29,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-03-18 05:21:29,584 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 05:21:29,585 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 05:21:29,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2022-03-18 05:21:29,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2022-03-18 05:21:29,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core
[2022-03-18 05:21:29,625 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2022-03-18 05:21:29,718 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-03-18 05:21:29,718 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2022-03-18 05:21:29,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-03-18 05:21:29,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023907114]
[2022-03-18 05:21:29,719 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-03-18 05:21:29,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860138698]
[2022-03-18 05:21:29,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860138698] provided 1 perfect and 0 imperfect interpolant sequences
[2022-03-18 05:21:29,719 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-03-18 05:21:29,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2022-03-18 05:21:29,720 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace
[2022-03-18 05:21:29,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1156651487]
[2022-03-18 05:21:29,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1156651487] provided 1 perfect and 0 imperfect interpolant sequences
[2022-03-18 05:21:29,720 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-03-18 05:21:29,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2022-03-18 05:21:29,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748545407]
[2022-03-18 05:21:29,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-03-18 05:21:29,721 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2022-03-18 05:21:29,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION
[2022-03-18 05:21:29,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2022-03-18 05:21:29,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2022-03-18 05:21:29,722 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3)
[2022-03-18 05:21:29,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-03-18 05:21:29,762 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions.
[2022-03-18 05:21:29,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states.
[2022-03-18 05:21:29,763 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22
[2022-03-18 05:21:29,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-03-18 05:21:29,764 INFO L225 Difference]: With dead ends: 44
[2022-03-18 05:21:29,764 INFO L226 Difference]: Without dead ends: 42
[2022-03-18 05:21:29,764 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 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 05:21:29,765 INFO L912 BasicCegarLoop]: 33 mSDtfsCounter, 6 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-03-18 05:21:29,766 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 115 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-03-18 05:21:29,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states.
[2022-03-18 05:21:29,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41.
[2022-03-18 05:21:29,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 23 states have internal predecessors, (24), 14 states have call successors, (14), 6 states have call predecessors, (14), 5 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12)
[2022-03-18 05:21:29,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions.
[2022-03-18 05:21:29,777 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 22
[2022-03-18 05:21:29,777 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-03-18 05:21:29,777 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions.
[2022-03-18 05:21:29,777 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3)
[2022-03-18 05:21:29,777 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions.
[2022-03-18 05:21:29,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28
[2022-03-18 05:21:29,778 INFO L492 BasicCegarLoop]: Found error trace
[2022-03-18 05:21:29,778 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-03-18 05:21:29,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2022-03-18 05:21:29,995 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-03-18 05:21:29,996 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-03-18 05:21:29,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-03-18 05:21:29,996 INFO L85 PathProgramCache]: Analyzing trace with hash 2087529154, now seen corresponding path program 1 times
[2022-03-18 05:21:29,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION
[2022-03-18 05:21:29,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [70356421]
[2022-03-18 05:21:29,997 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2022-03-18 05:21:29,997 INFO L85 PathProgramCache]: Analyzing trace with hash 2087529154, now seen corresponding path program 2 times
[2022-03-18 05:21:29,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-03-18 05:21:29,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409504435]
[2022-03-18 05:21:29,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-03-18 05:21:29,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-03-18 05:21:30,004 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-03-18 05:21:30,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [115031021]
[2022-03-18 05:21:30,005 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2022-03-18 05:21:30,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-03-18 05:21:30,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-03-18 05:21:30,010 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 05:21:30,020 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 05:21:30,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2022-03-18 05:21:30,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2022-03-18 05:21:30,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core
[2022-03-18 05:21:30,051 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2022-03-18 05:21:30,140 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2022-03-18 05:21:30,141 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2022-03-18 05:21:30,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-03-18 05:21:30,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409504435]
[2022-03-18 05:21:30,142 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-03-18 05:21:30,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115031021]
[2022-03-18 05:21:30,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115031021] provided 1 perfect and 0 imperfect interpolant sequences
[2022-03-18 05:21:30,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-03-18 05:21:30,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2022-03-18 05:21:30,143 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace
[2022-03-18 05:21:30,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [70356421]
[2022-03-18 05:21:30,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [70356421] provided 1 perfect and 0 imperfect interpolant sequences
[2022-03-18 05:21:30,144 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-03-18 05:21:30,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2022-03-18 05:21:30,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735653553]
[2022-03-18 05:21:30,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-03-18 05:21:30,145 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2022-03-18 05:21:30,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION
[2022-03-18 05:21:30,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2022-03-18 05:21:30,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2022-03-18 05:21:30,148 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4)
[2022-03-18 05:21:30,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-03-18 05:21:30,203 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions.
[2022-03-18 05:21:30,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states.
[2022-03-18 05:21:30,210 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27
[2022-03-18 05:21:30,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-03-18 05:21:30,211 INFO L225 Difference]: With dead ends: 48
[2022-03-18 05:21:30,211 INFO L226 Difference]: Without dead ends: 43
[2022-03-18 05:21:30,211 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 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 05:21:30,212 INFO L912 BasicCegarLoop]: 34 mSDtfsCounter, 6 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-03-18 05:21:30,212 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 118 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-03-18 05:21:30,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states.
[2022-03-18 05:21:30,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43.
[2022-03-18 05:21:30,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 25 states have internal predecessors, (26), 12 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10)
[2022-03-18 05:21:30,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions.
[2022-03-18 05:21:30,224 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 27
[2022-03-18 05:21:30,225 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-03-18 05:21:30,225 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions.
[2022-03-18 05:21:30,225 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4)
[2022-03-18 05:21:30,225 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions.
[2022-03-18 05:21:30,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35
[2022-03-18 05:21:30,226 INFO L492 BasicCegarLoop]: Found error trace
[2022-03-18 05:21:30,226 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-03-18 05:21:30,246 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 05:21:30,426 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,SelfDestructingSolverStorable3
[2022-03-18 05:21:30,426 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-03-18 05:21:30,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-03-18 05:21:30,427 INFO L85 PathProgramCache]: Analyzing trace with hash -2092280728, now seen corresponding path program 1 times
[2022-03-18 05:21:30,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION
[2022-03-18 05:21:30,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [767090960]
[2022-03-18 05:21:30,927 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE
[2022-03-18 05:21:30,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1589942244, now seen corresponding path program 1 times
[2022-03-18 05:21:30,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-03-18 05:21:30,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850872853]
[2022-03-18 05:21:30,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-03-18 05:21:30,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-03-18 05:21:30,935 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-03-18 05:21:30,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1412359531]
[2022-03-18 05:21:30,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-03-18 05:21:30,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-03-18 05:21:30,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-03-18 05:21:30,938 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-03-18 05:21:30,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2022-03-18 05:21:30,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-03-18 05:21:30,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 8 conjunts are in the unsatisfiable core
[2022-03-18 05:21:30,964 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2022-03-18 05:21:31,023 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 05:21:31,024 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2022-03-18 05:21:31,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-03-18 05:21:31,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850872853]
[2022-03-18 05:21:31,024 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-03-18 05:21:31,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412359531]
[2022-03-18 05:21:31,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412359531] provided 1 perfect and 0 imperfect interpolant sequences
[2022-03-18 05:21:31,024 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-03-18 05:21:31,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2022-03-18 05:22:05,464 WARN L232 SmtUtils]: Spent 6.08s on a formula simplification. DAG size of input: 27 DAG size of output: 22 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)
[2022-03-18 05:22:05,580 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace
[2022-03-18 05:22:05,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [767090960]
[2022-03-18 05:22:05,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [767090960] provided 1 perfect and 0 imperfect interpolant sequences
[2022-03-18 05:22:05,580 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-03-18 05:22:05,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17
[2022-03-18 05:22:05,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45210549]
[2022-03-18 05:22:05,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-03-18 05:22:05,581 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states
[2022-03-18 05:22:05,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION
[2022-03-18 05:22:05,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants.
[2022-03-18 05:22:05,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=234, Unknown=11, NotChecked=0, Total=306
[2022-03-18 05:22:05,582 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 17 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5)
[2022-03-18 05:22:19,945 WARN L232 SmtUtils]: Spent 10.09s on a formula simplification. DAG size of input: 23 DAG size of output: 19 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)
[2022-03-18 05:22:21,983 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []
[2022-03-18 05:22:24,026 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []
[2022-03-18 05:22:26,086 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []
[2022-03-18 05:22:26,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-03-18 05:22:26,133 INFO L93 Difference]: Finished difference Result 57 states and 61 transitions.
[2022-03-18 05:22:26,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states.
[2022-03-18 05:22:26,134 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 34
[2022-03-18 05:22:26,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-03-18 05:22:26,135 INFO L225 Difference]: With dead ends: 57
[2022-03-18 05:22:26,135 INFO L226 Difference]: Without dead ends: 54
[2022-03-18 05:22:26,136 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 48.8s TimeCoverageRelationStatistics Valid=89, Invalid=360, Unknown=13, NotChecked=0, Total=462
[2022-03-18 05:22:26,136 INFO L912 BasicCegarLoop]: 30 mSDtfsCounter, 15 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 20 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time
[2022-03-18 05:22:26,136 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 263 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 130 Invalid, 3 Unknown, 41 Unchecked, 6.2s Time]
[2022-03-18 05:22:26,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states.
[2022-03-18 05:22:26,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54.
[2022-03-18 05:22:26,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 34 states have internal predecessors, (35), 11 states have call successors, (11), 10 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9)
[2022-03-18 05:22:26,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions.
[2022-03-18 05:22:26,145 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 34
[2022-03-18 05:22:26,145 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-03-18 05:22:26,145 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions.
[2022-03-18 05:22:26,145 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5)
[2022-03-18 05:22:26,145 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions.
[2022-03-18 05:22:26,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51
[2022-03-18 05:22:26,146 INFO L492 BasicCegarLoop]: Found error trace
[2022-03-18 05:22:26,146 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-03-18 05:22:26,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0
[2022-03-18 05:22:26,346 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-03-18 05:22:26,347 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-03-18 05:22:26,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-03-18 05:22:26,347 INFO L85 PathProgramCache]: Analyzing trace with hash -985423115, now seen corresponding path program 1 times
[2022-03-18 05:22:26,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION
[2022-03-18 05:22:26,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [24543556]
[2022-03-18 05:22:26,796 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE
[2022-03-18 05:22:26,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1515990761, now seen corresponding path program 1 times
[2022-03-18 05:22:26,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-03-18 05:22:26,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102893171]
[2022-03-18 05:22:26,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-03-18 05:22:26,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-03-18 05:22:26,821 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-03-18 05:22:26,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1087708816]
[2022-03-18 05:22:26,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-03-18 05:22:26,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-03-18 05:22:26,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-03-18 05:22:26,829 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-03-18 05:22:26,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2022-03-18 05:22:26,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-03-18 05:22:26,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 11 conjunts are in the unsatisfiable core
[2022-03-18 05:22:26,865 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2022-03-18 05:22:26,933 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2022-03-18 05:22:26,933 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2022-03-18 05:22:27,014 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2022-03-18 05:22:27,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-03-18 05:22:27,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102893171]
[2022-03-18 05:22:27,014 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-03-18 05:22:27,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087708816]
[2022-03-18 05:22:27,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087708816] provided 0 perfect and 2 imperfect interpolant sequences
[2022-03-18 05:22:27,015 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2022-03-18 05:22:27,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9
[2022-03-18 05:23:03,559 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace
[2022-03-18 05:23:03,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [24543556]
[2022-03-18 05:23:03,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [24543556] provided 1 perfect and 0 imperfect interpolant sequences
[2022-03-18 05:23:03,560 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-03-18 05:23:03,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19
[2022-03-18 05:23:03,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710193419]
[2022-03-18 05:23:03,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-03-18 05:23:03,560 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states
[2022-03-18 05:23:03,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION
[2022-03-18 05:23:03,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants.
[2022-03-18 05:23:03,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=316, Unknown=13, NotChecked=0, Total=420
[2022-03-18 05:23:03,561 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 13 states have internal predecessors, (29), 3 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8)
[2022-03-18 05:23:17,766 WARN L232 SmtUtils]: Spent 10.03s on a formula simplification. DAG size of input: 23 DAG size of output: 19 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)
[2022-03-18 05:23:17,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-03-18 05:23:17,939 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions.
[2022-03-18 05:23:17,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states.
[2022-03-18 05:23:17,939 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 13 states have internal predecessors, (29), 3 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 50
[2022-03-18 05:23:17,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-03-18 05:23:17,940 INFO L225 Difference]: With dead ends: 54
[2022-03-18 05:23:17,940 INFO L226 Difference]: Without dead ends: 0
[2022-03-18 05:23:17,940 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 50.8s TimeCoverageRelationStatistics Valid=119, Invalid=466, Unknown=15, NotChecked=0, Total=600
[2022-03-18 05:23:17,941 INFO L912 BasicCegarLoop]: 25 mSDtfsCounter, 18 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-03-18 05:23:17,941 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 185 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 107 Invalid, 0 Unknown, 33 Unchecked, 0.1s Time]
[2022-03-18 05:23:17,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states.
[2022-03-18 05:23:17,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0.
[2022-03-18 05:23:17,941 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 05:23:17,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions.
[2022-03-18 05:23:17,942 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 50
[2022-03-18 05:23:17,942 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-03-18 05:23:17,942 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions.
[2022-03-18 05:23:17,942 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 13 states have internal predecessors, (29), 3 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8)
[2022-03-18 05:23:17,942 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions.
[2022-03-18 05:23:17,942 INFO L282 IsEmpty]: Finished isEmpty. No accepting run.
[2022-03-18 05:23:17,944 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining)
[2022-03-18 05:23:17,962 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0
[2022-03-18 05:23:18,144 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-03-18 05:23:18,146 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.
[2022-03-18 05:23:36,826 WARN L232 SmtUtils]: Spent 10.42s on a formula simplification. DAG size of input: 61 DAG size of output: 17 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter)
[2022-03-18 05:23:53,028 WARN L232 SmtUtils]: Spent 16.14s on a formula simplification. DAG size of input: 61 DAG size of output: 17 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter)
[2022-03-18 05:24:09,207 WARN L232 SmtUtils]: Spent 16.18s on a formula simplification. DAG size of input: 61 DAG size of output: 17 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter)
[2022-03-18 05:24:09,252 INFO L882 garLoopResultBuilder]: For program point reach_errorEXIT(line 5) no Hoare annotation was computed.
[2022-03-18 05:24:09,252 INFO L882 garLoopResultBuilder]: For program point reach_errorENTRY(line 5) no Hoare annotation was computed.
[2022-03-18 05:24:09,252 INFO L882 garLoopResultBuilder]: For program point reach_errorFINAL(line 5) no Hoare annotation was computed.
[2022-03-18 05:24:09,252 INFO L885 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 8 10) the Hoare annotation is: true
[2022-03-18 05:24:09,252 INFO L885 garLoopResultBuilder]: At program point L9(line 9) the Hoare annotation is: true
[2022-03-18 05:24:09,252 INFO L885 garLoopResultBuilder]: At program point L9-2(lines 8 10) the Hoare annotation is: true
[2022-03-18 05:24:09,252 INFO L885 garLoopResultBuilder]: At program point assume_abort_if_notEXIT(lines 8 10) the Hoare annotation is: true
[2022-03-18 05:24:09,253 INFO L878 garLoopResultBuilder]: At program point L33(lines 30 42) the Hoare annotation is: (and (= (+ (* main_~t~0 2) (* main_~t~0 main_~t~0) 1) (* main_~s~0 4)) (= main_~t~0 (+ (* main_~a~0 2) 1)))
[2022-03-18 05:24:09,253 INFO L878 garLoopResultBuilder]: At program point L31(line 31) the Hoare annotation is: (and (= main_~t~0 1) (= (+ (* main_~t~0 2) (* main_~t~0 main_~t~0) 1) (* main_~s~0 4)) (= main_~t~0 (+ (* main_~a~0 2) 1)))
[2022-03-18 05:24:09,253 INFO L878 garLoopResultBuilder]: At program point L31-1(line 31) the Hoare annotation is: (and (= main_~t~0 1) (= (+ (* main_~t~0 2) (* main_~t~0 main_~t~0) 1) (* main_~s~0 4)) (= main_~t~0 (+ (* main_~a~0 2) 1)))
[2022-03-18 05:24:09,253 INFO L885 garLoopResultBuilder]: At program point mainEXIT(lines 20 49) the Hoare annotation is: true
[2022-03-18 05:24:09,253 INFO L885 garLoopResultBuilder]: At program point L46(line 46) the Hoare annotation is: true
[2022-03-18 05:24:09,253 INFO L885 garLoopResultBuilder]: At program point mainFINAL(lines 20 49) the Hoare annotation is: true
[2022-03-18 05:24:09,253 INFO L878 garLoopResultBuilder]: At program point L44(line 44) the Hoare annotation is: (and (= (+ (* main_~t~0 2) (* main_~t~0 main_~t~0) 1) (* main_~s~0 4)) (= main_~t~0 (+ (* main_~a~0 2) 1)))
[2022-03-18 05:24:09,253 INFO L878 garLoopResultBuilder]: At program point L32(line 32) the Hoare annotation is: (and (= main_~t~0 1) (= (+ (* main_~t~0 2) (* main_~t~0 main_~t~0) 1) (* main_~s~0 4)) (= main_~t~0 (+ (* main_~a~0 2) 1)))
[2022-03-18 05:24:09,253 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 20 49) the Hoare annotation is: true
[2022-03-18 05:24:09,253 INFO L878 garLoopResultBuilder]: At program point L30-2(lines 30 42) the Hoare annotation is: (let ((.cse1 (* main_~a~0 2))) (let ((.cse0 (= main_~t~0 (+ .cse1 1)))) (or (and (= main_~t~0 1) (= (+ (* main_~t~0 2) (* main_~t~0 main_~t~0) 1) (* main_~s~0 4)) .cse0) (and (<= main_~s~0 (+ main_~n~0 main_~t~0)) (= (+ .cse1 (* main_~a~0 main_~a~0) 1) main_~s~0) .cse0))))
[2022-03-18 05:24:09,253 INFO L878 garLoopResultBuilder]: At program point L30-3(lines 30 42) the Hoare annotation is: (and (= (+ (* main_~t~0 2) (* main_~t~0 main_~t~0) 1) (* main_~s~0 4)) (= main_~t~0 (+ (* main_~a~0 2) 1)))
[2022-03-18 05:24:09,253 INFO L885 garLoopResultBuilder]: At program point L24(line 24) the Hoare annotation is: true
[2022-03-18 05:24:09,253 INFO L885 garLoopResultBuilder]: At program point L24-1(line 24) the Hoare annotation is: true
[2022-03-18 05:24:09,253 INFO L878 garLoopResultBuilder]: At program point L45(line 45) the Hoare annotation is: (= (+ (* main_~t~0 2) (* main_~t~0 main_~t~0) 1) (* main_~s~0 4))
[2022-03-18 05:24:09,254 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true
[2022-03-18 05:24:09,254 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 05:24:09,254 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true
[2022-03-18 05:24:09,254 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true
[2022-03-18 05:24:09,254 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true
[2022-03-18 05:24:09,254 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true
[2022-03-18 05:24:09,254 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true
[2022-03-18 05:24:09,254 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 11 17) the Hoare annotation is: true
[2022-03-18 05:24:09,254 INFO L878 garLoopResultBuilder]: At program point L13(lines 13 14) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0)
[2022-03-18 05:24:09,254 INFO L878 garLoopResultBuilder]: At program point L12(lines 12 15) the Hoare annotation is: (and (or (not (<= 1 |__VERIFIER_assert_#in~cond|)) (<= 1 __VERIFIER_assert_~cond)) (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) (or (not (= |__VERIFIER_assert_#in~cond| 1)) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)))
[2022-03-18 05:24:09,254 INFO L878 garLoopResultBuilder]: At program point L12-2(lines 11 17) the Hoare annotation is: (and (or (not (<= 1 |__VERIFIER_assert_#in~cond|)) (<= 1 __VERIFIER_assert_~cond)) (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) (or (not (= |__VERIFIER_assert_#in~cond| 1)) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)))
[2022-03-18 05:24:09,254 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertEXIT(lines 11 17) the Hoare annotation is: (and (or (not (<= 1 |__VERIFIER_assert_#in~cond|)) (<= 1 __VERIFIER_assert_~cond)) (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) (or (not (= |__VERIFIER_assert_#in~cond| 1)) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)))
[2022-03-18 05:24:09,254 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0)
[2022-03-18 05:24:09,256 INFO L718 BasicCegarLoop]: Path program histogram: [2, 2, 2, 2, 1, 1, 1, 1]
[2022-03-18 05:24:09,257 INFO L180 ceAbstractionStarter]: Computing trace abstraction results
[2022-03-18 05:24:09,270 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 05:24:09 BoogieIcfgContainer
[2022-03-18 05:24:09,270 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2022-03-18 05:24:09,271 INFO L158 Benchmark]: Toolchain (without parser) took 160920.90ms. Allocated memory was 175.1MB in the beginning and 215.0MB in the end (delta: 39.8MB). Free memory was 125.4MB in the beginning and 70.8MB in the end (delta: 54.6MB). Peak memory consumption was 93.9MB. Max. memory is 8.0GB.
[2022-03-18 05:24:09,271 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 175.1MB. Free memory is still 141.7MB. There was no memory consumed. Max. memory is 8.0GB.
[2022-03-18 05:24:09,271 INFO L158 Benchmark]: CACSL2BoogieTranslator took 164.85ms. Allocated memory is still 175.1MB. Free memory was 125.1MB in the beginning and 151.1MB in the end (delta: -25.9MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB.
[2022-03-18 05:24:09,271 INFO L158 Benchmark]: Boogie Preprocessor took 17.08ms. Allocated memory is still 175.1MB. Free memory was 151.1MB in the beginning and 149.5MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB.
[2022-03-18 05:24:09,272 INFO L158 Benchmark]: RCFGBuilder took 243.37ms. Allocated memory is still 175.1MB. Free memory was 149.5MB in the beginning and 139.5MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB.
[2022-03-18 05:24:09,272 INFO L158 Benchmark]: TraceAbstraction took 160490.06ms. Allocated memory was 175.1MB in the beginning and 215.0MB in the end (delta: 39.8MB). Free memory was 139.0MB in the beginning and 70.8MB in the end (delta: 68.3MB). Peak memory consumption was 109.2MB. Max. memory is 8.0GB.
[2022-03-18 05:24:09,273 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 175.1MB. Free memory is still 141.7MB. There was no memory consumed. Max. memory is 8.0GB.
* CACSL2BoogieTranslator took 164.85ms. Allocated memory is still 175.1MB. Free memory was 125.1MB in the beginning and 151.1MB in the end (delta: -25.9MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB.
* Boogie Preprocessor took 17.08ms. Allocated memory is still 175.1MB. Free memory was 151.1MB in the beginning and 149.5MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB.
* RCFGBuilder took 243.37ms. Allocated memory is still 175.1MB. Free memory was 149.5MB in the beginning and 139.5MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB.
* TraceAbstraction took 160490.06ms. Allocated memory was 175.1MB in the beginning and 215.0MB in the end (delta: 39.8MB). Free memory was 139.0MB in the beginning and 70.8MB in the end (delta: 68.3MB). Peak memory consumption was 109.2MB. Max. memory is 8.0GB.
* Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
- StatisticsResult: ErrorAutomatonStatistics
NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0
- PositiveResult [Line: 14]: 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, 34 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 160.4s, OverallIterations: 6, TraceHistogramMax: 7, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 35.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 51.1s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 3 mSolverCounterUnknown, 107 SdHoareTripleChecker+Valid, 6.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 85 mSDsluCounter, 752 SdHoareTripleChecker+Invalid, 6.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 74 IncrementalHoareTripleChecker+Unchecked, 579 mSDsCounter, 82 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 401 IncrementalHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 82 mSolverCounterUnsat, 173 mSDtfsCounter, 401 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 211 GetRequests, 145 SyntacticMatches, 6 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 99.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=54occurred in iteration=5, InterpolantAutomatonStates: 42, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 6 MinimizatonAttempts, 3 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 31 LocationsWithAnnotation, 133 PreInvPairs, 191 NumberOfFragments, 293 HoareAnnotationTreeSize, 133 FomulaSimplifications, 72 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 31 FomulaSimplificationsInter, 1707 FormulaSimplificationTreeSizeReductionInter, 51.1s 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: 30]: Loop Invariant
Derived loop invariant: ((t == 1 && t * 2 + t * t + 1 == s * 4) && t == a * 2 + 1) || ((s <= n + t && a * 2 + a * a + 1 == s) && t == a * 2 + 1)
- ProcedureContractResult [Line: 8]: Procedure Contract for assume_abort_if_not
Derived contract for procedure assume_abort_if_not: 1
- ProcedureContractResult [Line: 20]: Procedure Contract for main
Derived contract for procedure main: 1
- ProcedureContractResult [Line: 11]: Procedure Contract for __VERIFIER_assert
Derived contract for procedure __VERIFIER_assert: ((!(1 <= \old(cond)) || 1 <= cond) && (\old(cond) == 0 || !(cond == 0))) && (!(\old(cond) == 1) || \old(cond) == cond)
RESULT: Ultimate proved your program to be correct!
[2022-03-18 05:24:09,319 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...