/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/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_unwindbound2.c
--------------------------------------------------------------------------------
This is Ultimate 0.2.2-dev-34549b5
[2022-04-06 18:18:39,033 INFO L177 SettingsManager]: Resetting all preferences to default values...
[2022-04-06 18:18:39,034 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values
[2022-04-06 18:18:39,071 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2022-04-06 18:18:39,072 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2022-04-06 18:18:39,072 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2022-04-06 18:18:39,073 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2022-04-06 18:18:39,074 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values
[2022-04-06 18:18:39,079 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values
[2022-04-06 18:18:39,082 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values
[2022-04-06 18:18:39,083 INFO L181 SettingsManager]: Resetting Sifa preferences to default values
[2022-04-06 18:18:39,084 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2022-04-06 18:18:39,085 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values
[2022-04-06 18:18:39,086 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values
[2022-04-06 18:18:39,087 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2022-04-06 18:18:39,089 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values
[2022-04-06 18:18:39,089 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2022-04-06 18:18:39,090 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2022-04-06 18:18:39,094 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2022-04-06 18:18:39,098 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values
[2022-04-06 18:18:39,100 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values
[2022-04-06 18:18:39,100 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2022-04-06 18:18:39,101 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values
[2022-04-06 18:18:39,103 INFO L181 SettingsManager]: Resetting Referee preferences to default values
[2022-04-06 18:18:39,104 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values
[2022-04-06 18:18:39,108 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2022-04-06 18:18:39,108 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2022-04-06 18:18:39,109 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values
[2022-04-06 18:18:39,109 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values
[2022-04-06 18:18:39,109 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values
[2022-04-06 18:18:39,110 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring...
[2022-04-06 18:18:39,110 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values
[2022-04-06 18:18:39,111 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2022-04-06 18:18:39,112 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values
[2022-04-06 18:18:39,112 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values
[2022-04-06 18:18:39,113 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2022-04-06 18:18:39,113 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values
[2022-04-06 18:18:39,113 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2022-04-06 18:18:39,113 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring...
[2022-04-06 18:18:39,113 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values
[2022-04-06 18:18:39,114 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values
[2022-04-06 18:18:39,115 INFO L188 SettingsManager]: Finished resetting all preferences to default values...
[2022-04-06 18:18:39,115 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf
[2022-04-06 18:18:39,124 INFO L113 SettingsManager]: Loading preferences was successful
[2022-04-06 18:18:39,125 INFO L115 SettingsManager]: Preferences different from defaults after loading the file:
[2022-04-06 18:18:39,126 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2022-04-06 18:18:39,126 INFO L138 SettingsManager]: * sizeof long=4
[2022-04-06 18:18:39,126 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true
[2022-04-06 18:18:39,126 INFO L138 SettingsManager]: * sizeof POINTER=4
[2022-04-06 18:18:39,126 INFO L138 SettingsManager]: * Check division by zero=IGNORE
[2022-04-06 18:18:39,126 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE
[2022-04-06 18:18:39,126 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE
[2022-04-06 18:18:39,127 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE
[2022-04-06 18:18:39,127 INFO L138 SettingsManager]: * sizeof long double=12
[2022-04-06 18:18:39,127 INFO L138 SettingsManager]: * Check if freed pointer was valid=false
[2022-04-06 18:18:39,127 INFO L138 SettingsManager]: * Use constant arrays=true
[2022-04-06 18:18:39,127 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE
[2022-04-06 18:18:39,127 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2022-04-06 18:18:39,127 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements
[2022-04-06 18:18:39,127 INFO L138 SettingsManager]: * To the following directory=./dump/
[2022-04-06 18:18:39,127 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode
[2022-04-06 18:18:39,127 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-04-06 18:18:39,128 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2022-04-06 18:18:39,128 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation
[2022-04-06 18:18:39,128 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION
[2022-04-06 18:18:39,128 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL
[2022-04-06 18:18:39,128 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2022-04-06 18:18:39,128 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN
[2022-04-06 18:18:39,128 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN;
[2022-04-06 18:18:39,301 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp
[2022-04-06 18:18:39,317 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2022-04-06 18:18:39,318 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2022-04-06 18:18:39,319 INFO L271 PluginConnector]: Initializing CDTParser...
[2022-04-06 18:18:39,319 INFO L275 PluginConnector]: CDTParser initialized
[2022-04-06 18:18:39,320 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_unwindbound2.c
[2022-04-06 18:18:39,371 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/306537cbb/9c44ba1868d64452b2531008de55b4ee/FLAGae376052d
[2022-04-06 18:18:39,717 INFO L306 CDTParser]: Found 1 translation units.
[2022-04-06 18:18:39,717 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_unwindbound2.c
[2022-04-06 18:18:39,723 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/306537cbb/9c44ba1868d64452b2531008de55b4ee/FLAGae376052d
[2022-04-06 18:18:39,734 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/306537cbb/9c44ba1868d64452b2531008de55b4ee
[2022-04-06 18:18:39,736 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2022-04-06 18:18:39,737 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements.
[2022-04-06 18:18:39,739 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2022-04-06 18:18:39,739 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator...
[2022-04-06 18:18:39,742 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized
[2022-04-06 18:18:39,742 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 06:18:39" (1/1) ...
[2022-04-06 18:18:39,743 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b2d1299 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:18:39, skipping insertion in model container
[2022-04-06 18:18:39,743 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 06:18:39" (1/1) ...
[2022-04-06 18:18:39,748 INFO L145 MainTranslator]: Starting translation in SV-COMP mode
[2022-04-06 18:18:39,767 INFO L178 MainTranslator]: Built tables and reachable declarations
[2022-04-06 18:18:39,906 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/ps4-ll_unwindbound2.c[458,471]
[2022-04-06 18:18:39,918 INFO L210 PostProcessor]: Analyzing one entry point: main
[2022-04-06 18:18:39,923 INFO L203 MainTranslator]: Completed pre-run
[2022-04-06 18:18:39,930 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/ps4-ll_unwindbound2.c[458,471]
[2022-04-06 18:18:39,934 INFO L210 PostProcessor]: Analyzing one entry point: main
[2022-04-06 18:18:39,946 INFO L208 MainTranslator]: Completed translation
[2022-04-06 18:18:39,946 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:18:39 WrapperNode
[2022-04-06 18:18:39,947 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2022-04-06 18:18:39,948 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2022-04-06 18:18:39,948 INFO L271 PluginConnector]: Initializing Boogie Preprocessor...
[2022-04-06 18:18:39,948 INFO L275 PluginConnector]: Boogie Preprocessor initialized
[2022-04-06 18:18:39,954 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:18:39" (1/1) ...
[2022-04-06 18:18:39,954 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:18:39" (1/1) ...
[2022-04-06 18:18:39,959 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:18:39" (1/1) ...
[2022-04-06 18:18:39,960 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:18:39" (1/1) ...
[2022-04-06 18:18:39,968 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:18:39" (1/1) ...
[2022-04-06 18:18:39,972 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:18:39" (1/1) ...
[2022-04-06 18:18:39,973 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:18:39" (1/1) ...
[2022-04-06 18:18:39,978 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2022-04-06 18:18:39,979 INFO L113 PluginConnector]: ------------------------RCFGBuilder----------------------------
[2022-04-06 18:18:39,979 INFO L271 PluginConnector]: Initializing RCFGBuilder...
[2022-04-06 18:18:39,979 INFO L275 PluginConnector]: RCFGBuilder initialized
[2022-04-06 18:18:39,980 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:18:39" (1/1) ...
[2022-04-06 18:18:39,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-04-06 18:18:39,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-04-06 18:18:40,012 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)
[2022-04-06 18:18:40,029 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
[2022-04-06 18:18:40,045 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2022-04-06 18:18:40,045 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2022-04-06 18:18:40,045 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error
[2022-04-06 18:18:40,045 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2022-04-06 18:18:40,046 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2022-04-06 18:18:40,046 INFO L138 BoogieDeclarations]: Found implementation of procedure main
[2022-04-06 18:18:40,046 INFO L130 BoogieDeclarations]: Found specification of procedure abort
[2022-04-06 18:18:40,046 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail
[2022-04-06 18:18:40,046 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error
[2022-04-06 18:18:40,046 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2022-04-06 18:18:40,046 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short
[2022-04-06 18:18:40,051 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2022-04-06 18:18:40,052 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2022-04-06 18:18:40,052 INFO L130 BoogieDeclarations]: Found specification of procedure main
[2022-04-06 18:18:40,052 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2022-04-06 18:18:40,052 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int
[2022-04-06 18:18:40,052 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2022-04-06 18:18:40,052 INFO L130 BoogieDeclarations]: Found specification of procedure write~int
[2022-04-06 18:18:40,052 INFO L130 BoogieDeclarations]: Found specification of procedure read~int
[2022-04-06 18:18:40,052 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2022-04-06 18:18:40,103 INFO L234 CfgBuilder]: Building ICFG
[2022-04-06 18:18:40,104 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation
[2022-04-06 18:18:40,205 INFO L275 CfgBuilder]: Performing block encoding
[2022-04-06 18:18:40,209 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2022-04-06 18:18:40,209 INFO L299 CfgBuilder]: Removed 1 assume(true) statements.
[2022-04-06 18:18:40,211 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 06:18:40 BoogieIcfgContainer
[2022-04-06 18:18:40,211 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2022-04-06 18:18:40,212 INFO L113 PluginConnector]: ------------------------TraceAbstraction----------------------------
[2022-04-06 18:18:40,212 INFO L271 PluginConnector]: Initializing TraceAbstraction...
[2022-04-06 18:18:40,229 INFO L275 PluginConnector]: TraceAbstraction initialized
[2022-04-06 18:18:40,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 06:18:39" (1/3) ...
[2022-04-06 18:18:40,230 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54800530 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 06:18:40, skipping insertion in model container
[2022-04-06 18:18:40,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:18:39" (2/3) ...
[2022-04-06 18:18:40,230 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54800530 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 06:18:40, skipping insertion in model container
[2022-04-06 18:18:40,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 06:18:40" (3/3) ...
[2022-04-06 18:18:40,231 INFO L111 eAbstractionObserver]: Analyzing ICFG ps4-ll_unwindbound2.c
[2022-04-06 18:18:40,234 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2022-04-06 18:18:40,234 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2022-04-06 18:18:40,278 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2022-04-06 18:18:40,283 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
[2022-04-06 18:18:40,283 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2022-04-06 18:18:40,292 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5)
[2022-04-06 18:18:40,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12
[2022-04-06 18:18:40,296 INFO L491 BasicCegarLoop]: Found error trace
[2022-04-06 18:18:40,297 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-04-06 18:18:40,297 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-04-06 18:18:40,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-04-06 18:18:40,300 INFO L85 PathProgramCache]: Analyzing trace with hash -2133548928, now seen corresponding path program 1 times
[2022-04-06 18:18:40,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION
[2022-04-06 18:18:40,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1208554724]
[2022-04-06 18:18:40,332 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2022-04-06 18:18:40,332 INFO L85 PathProgramCache]: Analyzing trace with hash -2133548928, now seen corresponding path program 2 times
[2022-04-06 18:18:40,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-04-06 18:18:40,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247329716]
[2022-04-06 18:18:40,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-04-06 18:18:40,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-04-06 18:18:40,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-04-06 18:18:40,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-04-06 18:18:40,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-04-06 18:18:40,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-04-06 18:18:40,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-04-06 18:18:40,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247329716]
[2022-04-06 18:18:40,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247329716] provided 1 perfect and 0 imperfect interpolant sequences
[2022-04-06 18:18:40,498 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-04-06 18:18:40,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2022-04-06 18:18:40,512 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace
[2022-04-06 18:18:40,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1208554724]
[2022-04-06 18:18:40,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1208554724] provided 1 perfect and 0 imperfect interpolant sequences
[2022-04-06 18:18:40,512 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-04-06 18:18:40,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2022-04-06 18:18:40,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480843205]
[2022-04-06 18:18:40,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-04-06 18:18:40,516 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-04-06 18:18:40,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION
[2022-04-06 18:18:40,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-04-06 18:18:40,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-04-06 18:18:40,541 INFO L87 Difference]: Start difference. First operand has 23 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2022-04-06 18:18:40,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-04-06 18:18:40,601 INFO L93 Difference]: Finished difference Result 41 states and 55 transitions.
[2022-04-06 18:18:40,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states.
[2022-04-06 18:18:40,603 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11
[2022-04-06 18:18:40,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-04-06 18:18:40,608 INFO L225 Difference]: With dead ends: 41
[2022-04-06 18:18:40,608 INFO L226 Difference]: Without dead ends: 19
[2022-04-06 18:18:40,610 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-04-06 18:18:40,612 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-04-06 18:18:40,613 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 29 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-04-06 18:18:40,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states.
[2022-04-06 18:18:40,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18.
[2022-04-06 18:18:40,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3)
[2022-04-06 18:18:40,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions.
[2022-04-06 18:18:40,635 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 11
[2022-04-06 18:18:40,635 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-04-06 18:18:40,635 INFO L478 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions.
[2022-04-06 18:18:40,635 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2022-04-06 18:18:40,635 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions.
[2022-04-06 18:18:40,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13
[2022-04-06 18:18:40,636 INFO L491 BasicCegarLoop]: Found error trace
[2022-04-06 18:18:40,636 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-04-06 18:18:40,636 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2022-04-06 18:18:40,636 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-04-06 18:18:40,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-04-06 18:18:40,637 INFO L85 PathProgramCache]: Analyzing trace with hash -2118701623, now seen corresponding path program 1 times
[2022-04-06 18:18:40,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION
[2022-04-06 18:18:40,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [497693063]
[2022-04-06 18:18:40,638 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2022-04-06 18:18:40,638 INFO L85 PathProgramCache]: Analyzing trace with hash -2118701623, now seen corresponding path program 2 times
[2022-04-06 18:18:40,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-04-06 18:18:40,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774942527]
[2022-04-06 18:18:40,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-04-06 18:18:40,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-04-06 18:18:40,649 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-04-06 18:18:40,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1126746011]
[2022-04-06 18:18:40,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2022-04-06 18:18:40,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-04-06 18:18:40,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-04-06 18:18:40,651 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)
[2022-04-06 18:18:40,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2022-04-06 18:18:40,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s)
[2022-04-06 18:18:40,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2022-04-06 18:18:40,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core
[2022-04-06 18:18:40,703 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2022-04-06 18:18:40,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-04-06 18:18:40,763 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2022-04-06 18:18:40,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-04-06 18:18:40,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774942527]
[2022-04-06 18:18:40,764 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-04-06 18:18:40,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126746011]
[2022-04-06 18:18:40,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126746011] provided 1 perfect and 0 imperfect interpolant sequences
[2022-04-06 18:18:40,764 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-04-06 18:18:40,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2022-04-06 18:18:40,765 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace
[2022-04-06 18:18:40,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [497693063]
[2022-04-06 18:18:40,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [497693063] provided 1 perfect and 0 imperfect interpolant sequences
[2022-04-06 18:18:40,765 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-04-06 18:18:40,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2022-04-06 18:18:40,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940588579]
[2022-04-06 18:18:40,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-04-06 18:18:40,766 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2022-04-06 18:18:40,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION
[2022-04-06 18:18:40,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2022-04-06 18:18:40,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2022-04-06 18:18:40,767 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2022-04-06 18:18:40,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-04-06 18:18:40,785 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions.
[2022-04-06 18:18:40,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states.
[2022-04-06 18:18:40,785 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12
[2022-04-06 18:18:40,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-04-06 18:18:40,786 INFO L225 Difference]: With dead ends: 28
[2022-04-06 18:18:40,786 INFO L226 Difference]: Without dead ends: 20
[2022-04-06 18:18:40,786 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2022-04-06 18:18:40,787 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-04-06 18:18:40,788 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 51 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-04-06 18:18:40,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states.
[2022-04-06 18:18:40,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20.
[2022-04-06 18:18:40,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3)
[2022-04-06 18:18:40,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions.
[2022-04-06 18:18:40,793 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 12
[2022-04-06 18:18:40,793 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-04-06 18:18:40,793 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions.
[2022-04-06 18:18:40,793 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2022-04-06 18:18:40,794 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions.
[2022-04-06 18:18:40,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13
[2022-04-06 18:18:40,794 INFO L491 BasicCegarLoop]: Found error trace
[2022-04-06 18:18:40,794 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-04-06 18:18:40,811 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0
[2022-04-06 18:18:41,011 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-04-06 18:18:41,012 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-04-06 18:18:41,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-04-06 18:18:41,012 INFO L85 PathProgramCache]: Analyzing trace with hash -2116914163, now seen corresponding path program 1 times
[2022-04-06 18:18:41,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION
[2022-04-06 18:18:41,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [902360665]
[2022-04-06 18:18:41,013 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2022-04-06 18:18:41,013 INFO L85 PathProgramCache]: Analyzing trace with hash -2116914163, now seen corresponding path program 2 times
[2022-04-06 18:18:41,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-04-06 18:18:41,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004914420]
[2022-04-06 18:18:41,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-04-06 18:18:41,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-04-06 18:18:41,022 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-04-06 18:18:41,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1897406980]
[2022-04-06 18:18:41,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2022-04-06 18:18:41,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-04-06 18:18:41,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-04-06 18:18:41,026 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)
[2022-04-06 18:18:41,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2022-04-06 18:18:41,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s)
[2022-04-06 18:18:41,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2022-04-06 18:18:41,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core
[2022-04-06 18:18:41,073 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2022-04-06 18:18:41,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-04-06 18:18:41,135 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2022-04-06 18:18:41,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-04-06 18:18:41,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004914420]
[2022-04-06 18:18:41,135 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-04-06 18:18:41,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897406980]
[2022-04-06 18:18:41,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897406980] provided 1 perfect and 0 imperfect interpolant sequences
[2022-04-06 18:18:41,135 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-04-06 18:18:41,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2022-04-06 18:18:41,136 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace
[2022-04-06 18:18:41,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [902360665]
[2022-04-06 18:18:41,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [902360665] provided 1 perfect and 0 imperfect interpolant sequences
[2022-04-06 18:18:41,136 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-04-06 18:18:41,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2022-04-06 18:18:41,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395869224]
[2022-04-06 18:18:41,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-04-06 18:18:41,137 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2022-04-06 18:18:41,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION
[2022-04-06 18:18:41,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2022-04-06 18:18:41,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2022-04-06 18:18:41,137 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2022-04-06 18:18:41,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-04-06 18:18:41,210 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions.
[2022-04-06 18:18:41,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states.
[2022-04-06 18:18:41,210 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12
[2022-04-06 18:18:41,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-04-06 18:18:41,211 INFO L225 Difference]: With dead ends: 30
[2022-04-06 18:18:41,211 INFO L226 Difference]: Without dead ends: 26
[2022-04-06 18:18:41,211 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2022-04-06 18:18:41,215 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 6 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-04-06 18:18:41,216 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 64 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-04-06 18:18:41,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states.
[2022-04-06 18:18:41,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26.
[2022-04-06 18:18:41,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4)
[2022-04-06 18:18:41,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions.
[2022-04-06 18:18:41,222 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 12
[2022-04-06 18:18:41,222 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-04-06 18:18:41,222 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions.
[2022-04-06 18:18:41,222 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2022-04-06 18:18:41,222 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions.
[2022-04-06 18:18:41,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21
[2022-04-06 18:18:41,223 INFO L491 BasicCegarLoop]: Found error trace
[2022-04-06 18:18:41,223 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-04-06 18:18:41,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0
[2022-04-06 18:18:41,434 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2
[2022-04-06 18:18:41,435 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-04-06 18:18:41,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-04-06 18:18:41,435 INFO L85 PathProgramCache]: Analyzing trace with hash -263585780, now seen corresponding path program 1 times
[2022-04-06 18:18:41,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION
[2022-04-06 18:18:41,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [768969449]
[2022-04-06 18:18:41,449 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult
[2022-04-06 18:18:41,450 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE
[2022-04-06 18:18:41,450 INFO L274 tedInterpolationCore]: Could not compute an accelerate.
[2022-04-06 18:18:41,450 INFO L85 PathProgramCache]: Analyzing trace with hash -263585780, now seen corresponding path program 2 times
[2022-04-06 18:18:41,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-04-06 18:18:41,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335376831]
[2022-04-06 18:18:41,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-04-06 18:18:41,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-04-06 18:18:41,474 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-04-06 18:18:41,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2054950051]
[2022-04-06 18:18:41,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2022-04-06 18:18:41,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-04-06 18:18:41,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-04-06 18:18:41,488 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)
[2022-04-06 18:18:41,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2022-04-06 18:18:41,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2022-04-06 18:18:41,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2022-04-06 18:18:41,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjunts are in the unsatisfiable core
[2022-04-06 18:18:41,523 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2022-04-06 18:18:41,613 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-04-06 18:18:41,614 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2022-04-06 18:18:41,667 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-04-06 18:18:41,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-04-06 18:18:41,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335376831]
[2022-04-06 18:18:41,668 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-04-06 18:18:41,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054950051]
[2022-04-06 18:18:41,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054950051] provided 0 perfect and 2 imperfect interpolant sequences
[2022-04-06 18:18:41,671 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2022-04-06 18:18:41,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5
[2022-04-06 18:18:41,674 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace
[2022-04-06 18:18:41,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [768969449]
[2022-04-06 18:18:41,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [768969449] provided 1 perfect and 0 imperfect interpolant sequences
[2022-04-06 18:18:41,674 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-04-06 18:18:41,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2022-04-06 18:18:41,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998681650]
[2022-04-06 18:18:41,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-04-06 18:18:41,675 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2022-04-06 18:18:41,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION
[2022-04-06 18:18:41,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2022-04-06 18:18:41,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2022-04-06 18:18:41,676 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2022-04-06 18:18:41,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-04-06 18:18:41,723 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions.
[2022-04-06 18:18:41,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states.
[2022-04-06 18:18:41,724 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), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20
[2022-04-06 18:18:41,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-04-06 18:18:41,726 INFO L225 Difference]: With dead ends: 36
[2022-04-06 18:18:41,726 INFO L226 Difference]: Without dead ends: 28
[2022-04-06 18:18:41,726 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30
[2022-04-06 18:18:41,727 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 2 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-04-06 18:18:41,727 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 66 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-04-06 18:18:41,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states.
[2022-04-06 18:18:41,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28.
[2022-04-06 18:18:41,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4)
[2022-04-06 18:18:41,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions.
[2022-04-06 18:18:41,732 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 20
[2022-04-06 18:18:41,732 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-04-06 18:18:41,732 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions.
[2022-04-06 18:18:41,732 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), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2022-04-06 18:18:41,732 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions.
[2022-04-06 18:18:41,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21
[2022-04-06 18:18:41,733 INFO L491 BasicCegarLoop]: Found error trace
[2022-04-06 18:18:41,733 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-04-06 18:18:41,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0
[2022-04-06 18:18:41,933 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-04-06 18:18:41,934 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-04-06 18:18:41,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-04-06 18:18:41,934 INFO L85 PathProgramCache]: Analyzing trace with hash -261798320, now seen corresponding path program 1 times
[2022-04-06 18:18:41,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION
[2022-04-06 18:18:41,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1311478847]
[2022-04-06 18:18:41,938 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult
[2022-04-06 18:18:41,938 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE
[2022-04-06 18:18:41,938 INFO L274 tedInterpolationCore]: Could not compute an accelerate.
[2022-04-06 18:18:41,938 INFO L85 PathProgramCache]: Analyzing trace with hash -261798320, now seen corresponding path program 2 times
[2022-04-06 18:18:41,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-04-06 18:18:41,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109947129]
[2022-04-06 18:18:41,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-04-06 18:18:41,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-04-06 18:18:41,945 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-04-06 18:18:41,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [875132946]
[2022-04-06 18:18:41,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2022-04-06 18:18:41,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-04-06 18:18:41,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-04-06 18:18:41,948 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)
[2022-04-06 18:18:41,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2022-04-06 18:18:41,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2022-04-06 18:18:41,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2022-04-06 18:18:41,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 11 conjunts are in the unsatisfiable core
[2022-04-06 18:18:41,987 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2022-04-06 18:18:42,082 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-04-06 18:18:42,082 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2022-04-06 18:18:42,261 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked.
[2022-04-06 18:18:42,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-04-06 18:18:42,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109947129]
[2022-04-06 18:18:42,262 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-04-06 18:18:42,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875132946]
[2022-04-06 18:18:42,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875132946] provided 1 perfect and 1 imperfect interpolant sequences
[2022-04-06 18:18:42,262 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2022-04-06 18:18:42,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7
[2022-04-06 18:18:42,262 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace
[2022-04-06 18:18:42,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1311478847]
[2022-04-06 18:18:42,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1311478847] provided 1 perfect and 0 imperfect interpolant sequences
[2022-04-06 18:18:42,263 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-04-06 18:18:42,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2022-04-06 18:18:42,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857048229]
[2022-04-06 18:18:42,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-04-06 18:18:42,263 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2022-04-06 18:18:42,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION
[2022-04-06 18:18:42,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2022-04-06 18:18:42,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42
[2022-04-06 18:18:42,264 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2022-04-06 18:18:42,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-04-06 18:18:42,297 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions.
[2022-04-06 18:18:42,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states.
[2022-04-06 18:18:42,298 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20
[2022-04-06 18:18:42,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-04-06 18:18:42,298 INFO L225 Difference]: With dead ends: 34
[2022-04-06 18:18:42,298 INFO L226 Difference]: Without dead ends: 29
[2022-04-06 18:18:42,299 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56
[2022-04-06 18:18:42,299 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 7 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-04-06 18:18:42,300 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 53 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-04-06 18:18:42,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states.
[2022-04-06 18:18:42,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29.
[2022-04-06 18:18:42,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3)
[2022-04-06 18:18:42,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions.
[2022-04-06 18:18:42,306 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 20
[2022-04-06 18:18:42,306 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-04-06 18:18:42,306 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions.
[2022-04-06 18:18:42,306 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2022-04-06 18:18:42,306 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions.
[2022-04-06 18:18:42,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27
[2022-04-06 18:18:42,307 INFO L491 BasicCegarLoop]: Found error trace
[2022-04-06 18:18:42,307 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-04-06 18:18:42,326 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0
[2022-04-06 18:18:42,522 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-04-06 18:18:42,522 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-04-06 18:18:42,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-04-06 18:18:42,523 INFO L85 PathProgramCache]: Analyzing trace with hash 891414954, now seen corresponding path program 1 times
[2022-04-06 18:18:42,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION
[2022-04-06 18:18:42,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2145211127]
[2022-04-06 18:18:42,525 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult
[2022-04-06 18:18:42,526 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE
[2022-04-06 18:18:42,526 INFO L274 tedInterpolationCore]: Could not compute an accelerate.
[2022-04-06 18:18:42,526 INFO L85 PathProgramCache]: Analyzing trace with hash 891414954, now seen corresponding path program 2 times
[2022-04-06 18:18:42,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-04-06 18:18:42,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54539912]
[2022-04-06 18:18:42,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-04-06 18:18:42,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-04-06 18:18:42,534 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-04-06 18:18:42,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1357147178]
[2022-04-06 18:18:42,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2022-04-06 18:18:42,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-04-06 18:18:42,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-04-06 18:18:42,536 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-04-06 18:18:42,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process
[2022-04-06 18:18:42,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2022-04-06 18:18:42,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2022-04-06 18:18:42,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 12 conjunts are in the unsatisfiable core
[2022-04-06 18:18:42,572 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2022-04-06 18:18:42,709 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2022-04-06 18:18:42,710 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2022-04-06 18:18:42,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-04-06 18:18:42,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54539912]
[2022-04-06 18:18:42,815 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-04-06 18:18:42,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357147178]
[2022-04-06 18:18:42,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357147178] provided 0 perfect and 1 imperfect interpolant sequences
[2022-04-06 18:18:42,816 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences.
[2022-04-06 18:18:42,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7
[2022-04-06 18:18:42,816 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace
[2022-04-06 18:18:42,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2145211127]
[2022-04-06 18:18:42,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2145211127] provided 1 perfect and 0 imperfect interpolant sequences
[2022-04-06 18:18:42,816 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-04-06 18:18:42,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2022-04-06 18:18:42,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266333060]
[2022-04-06 18:18:42,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-04-06 18:18:42,816 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2022-04-06 18:18:42,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION
[2022-04-06 18:18:42,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2022-04-06 18:18:42,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90
[2022-04-06 18:18:42,817 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3)
[2022-04-06 18:18:42,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-04-06 18:18:42,870 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions.
[2022-04-06 18:18:42,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states.
[2022-04-06 18:18:42,871 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 26
[2022-04-06 18:18:42,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-04-06 18:18:42,872 INFO L225 Difference]: With dead ends: 36
[2022-04-06 18:18:42,872 INFO L226 Difference]: Without dead ends: 31
[2022-04-06 18:18:42,873 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132
[2022-04-06 18:18:42,875 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 2 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-04-06 18:18:42,875 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 100 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-04-06 18:18:42,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states.
[2022-04-06 18:18:42,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31.
[2022-04-06 18:18:42,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4)
[2022-04-06 18:18:42,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions.
[2022-04-06 18:18:42,897 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 26
[2022-04-06 18:18:42,897 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-04-06 18:18:42,897 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions.
[2022-04-06 18:18:42,897 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3)
[2022-04-06 18:18:42,897 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions.
[2022-04-06 18:18:42,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29
[2022-04-06 18:18:42,898 INFO L491 BasicCegarLoop]: Found error trace
[2022-04-06 18:18:42,898 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-04-06 18:18:42,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0
[2022-04-06 18:18:43,107 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-04-06 18:18:43,108 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-04-06 18:18:43,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-04-06 18:18:43,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1647059121, now seen corresponding path program 3 times
[2022-04-06 18:18:43,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION
[2022-04-06 18:18:43,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1868722338]
[2022-04-06 18:18:43,111 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult
[2022-04-06 18:18:43,111 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE
[2022-04-06 18:18:43,111 INFO L274 tedInterpolationCore]: Could not compute an accelerate.
[2022-04-06 18:18:43,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1647059121, now seen corresponding path program 4 times
[2022-04-06 18:18:43,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-04-06 18:18:43,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684876805]
[2022-04-06 18:18:43,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-04-06 18:18:43,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-04-06 18:18:43,117 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-04-06 18:18:43,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [634081777]
[2022-04-06 18:18:43,117 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
[2022-04-06 18:18:43,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-04-06 18:18:43,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-04-06 18:18:43,118 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-04-06 18:18:43,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process
[2022-04-06 18:18:43,150 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2022-04-06 18:18:43,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat
[2022-04-06 18:18:43,150 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2022-04-06 18:18:43,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat
[2022-04-06 18:18:43,171 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace
[2022-04-06 18:18:43,172 INFO L130 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found a feasible trace
[2022-04-06 18:18:43,172 INFO L618 BasicCegarLoop]: Counterexample is feasible
[2022-04-06 18:18:43,173 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining)
[2022-04-06 18:18:43,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0
[2022-04-06 18:18:43,387 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-04-06 18:18:43,390 INFO L719 BasicCegarLoop]: Path program histogram: [4, 2, 2, 2, 2, 2]
[2022-04-06 18:18:43,392 INFO L178 ceAbstractionStarter]: Computing trace abstraction results
[2022-04-06 18:18:43,400 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 06:18:43 BoogieIcfgContainer
[2022-04-06 18:18:43,400 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2022-04-06 18:18:43,401 INFO L158 Benchmark]: Toolchain (without parser) took 3664.01ms. Allocated memory was 194.0MB in the beginning and 244.3MB in the end (delta: 50.3MB). Free memory was 144.8MB in the beginning and 138.3MB in the end (delta: 6.5MB). Peak memory consumption was 57.7MB. Max. memory is 8.0GB.
[2022-04-06 18:18:43,401 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 194.0MB. Free memory is still 161.4MB. There was no memory consumed. Max. memory is 8.0GB.
[2022-04-06 18:18:43,401 INFO L158 Benchmark]: CACSL2BoogieTranslator took 208.13ms. Allocated memory is still 194.0MB. Free memory was 144.6MB in the beginning and 169.8MB in the end (delta: -25.2MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB.
[2022-04-06 18:18:43,401 INFO L158 Benchmark]: Boogie Preprocessor took 30.71ms. Allocated memory is still 194.0MB. Free memory was 169.8MB in the beginning and 168.2MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB.
[2022-04-06 18:18:43,401 INFO L158 Benchmark]: RCFGBuilder took 231.95ms. Allocated memory is still 194.0MB. Free memory was 168.2MB in the beginning and 158.2MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB.
[2022-04-06 18:18:43,402 INFO L158 Benchmark]: TraceAbstraction took 3188.25ms. Allocated memory was 194.0MB in the beginning and 244.3MB in the end (delta: 50.3MB). Free memory was 157.7MB in the beginning and 138.3MB in the end (delta: 19.5MB). Peak memory consumption was 71.3MB. Max. memory is 8.0GB.
[2022-04-06 18:18:43,402 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] #######################
--- Results ---
* Results from de.uni_freiburg.informatik.ultimate.core:
- StatisticsResult: Toolchain Benchmarks
Benchmark results are:
* CDTParser took 0.11ms. Allocated memory is still 194.0MB. Free memory is still 161.4MB. There was no memory consumed. Max. memory is 8.0GB.
* CACSL2BoogieTranslator took 208.13ms. Allocated memory is still 194.0MB. Free memory was 144.6MB in the beginning and 169.8MB in the end (delta: -25.2MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB.
* Boogie Preprocessor took 30.71ms. Allocated memory is still 194.0MB. Free memory was 169.8MB in the beginning and 168.2MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB.
* RCFGBuilder took 231.95ms. Allocated memory is still 194.0MB. Free memory was 168.2MB in the beginning and 158.2MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB.
* TraceAbstraction took 3188.25ms. Allocated memory was 194.0MB in the beginning and 244.3MB in the end (delta: 50.3MB). Free memory was 157.7MB in the beginning and 138.3MB in the end (delta: 19.5MB). Peak memory consumption was 71.3MB. Max. memory is 8.0GB.
* Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
- StatisticsResult: ErrorAutomatonStatistics
NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0
- CounterExampleResult [Line: 12]: a call to reach_error is reachable
a call to reach_error is reachable
We found a FailurePath:
[L17] int counter = 0;
[L19] short k;
[L20] long long y, x, c;
[L21] k = __VERIFIER_nondet_short()
[L23] y = 0
[L24] x = 0
[L25] c = 0
[L27] EXPR counter++
[L27] COND TRUE counter++<2
[L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0)
[L10] COND FALSE !(!(cond))
[L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0)
[L30] COND FALSE !(!(c < k))
[L33] c = c + 1
[L34] y = y + 1
[L35] x = y * y * y + x
[L27] EXPR counter++
[L27] COND TRUE counter++<2
[L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0)
[L10] COND FALSE !(!(cond))
[L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0)
[L30] COND FALSE !(!(c < k))
[L33] c = c + 1
[L34] y = y + 1
[L35] x = y * y * y + x
[L27] EXPR counter++
[L27] COND FALSE !(counter++<2)
[L37] CALL __VERIFIER_assert(k*y - (y*y) == 0)
[L10] COND TRUE !(cond)
[L12] reach_error()
- StatisticsResult: Ultimate Automizer benchmark data
CFG has 6 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 3.1s, OverallIterations: 7, TraceHistogramMax: 3, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 26 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 23 mSDsluCounter, 363 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 241 mSDsCounter, 10 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 125 IncrementalHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 10 mSolverCounterUnsat, 122 mSDtfsCounter, 125 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 148 GetRequests, 117 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=6, InterpolantAutomatonStates: 30, 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, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available
RESULT: Ultimate proved your program to be incorrect!
[2022-04-06 18:18:43,414 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...