/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/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_valuebound1.c


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


This is Ultimate 0.2.2-dev-a10ec3b
[2022-01-10 03:26:31,214 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2022-01-10 03:26:31,215 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2022-01-10 03:26:31,233 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2022-01-10 03:26:31,233 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2022-01-10 03:26:31,234 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2022-01-10 03:26:31,234 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
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[2022-01-10 03:26:31,239 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2022-01-10 03:26:31,240 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2022-01-10 03:26:31,241 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2022-01-10 03:26:31,241 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2022-01-10 03:26:31,242 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2022-01-10 03:26:31,243 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2022-01-10 03:26:31,244 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2022-01-10 03:26:31,245 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2022-01-10 03:26:31,256 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2022-01-10 03:26:31,256 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2022-01-10 03:26:31,257 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2022-01-10 03:26:31,258 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
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[2022-01-10 03:26:31,259 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
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[2022-01-10 03:26:31,260 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2022-01-10 03:26:31,260 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2022-01-10 03:26:31,260 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2022-01-10 03:26:31,261 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2022-01-10 03:26:31,261 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2022-01-10 03:26:31,262 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2022-01-10 03:26:31,262 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
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[2022-01-10 03:26:31,263 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2022-01-10 03:26:31,263 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2022-01-10 03:26:31,266 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2022-01-10 03:26:31,266 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf
[2022-01-10 03:26:31,315 INFO  L113        SettingsManager]: Loading preferences was successful
[2022-01-10 03:26:31,315 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2022-01-10 03:26:31,315 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2022-01-10 03:26:31,315 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2022-01-10 03:26:31,316 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2022-01-10 03:26:31,316 INFO  L138        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2022-01-10 03:26:31,316 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2022-01-10 03:26:31,316 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2022-01-10 03:26:31,317 INFO  L138        SettingsManager]:  * Use SBE=true
[2022-01-10 03:26:31,317 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2022-01-10 03:26:31,317 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2022-01-10 03:26:31,317 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2022-01-10 03:26:31,317 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2022-01-10 03:26:31,317 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2022-01-10 03:26:31,317 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2022-01-10 03:26:31,317 INFO  L138        SettingsManager]:  * Adapt memory model on pointer casts if necessary=true
[2022-01-10 03:26:31,317 INFO  L138        SettingsManager]:  * Use bitvectors instead of ints=true
[2022-01-10 03:26:31,317 INFO  L138        SettingsManager]:  * Memory model=HoenickeLindenmann_4ByteResolution
[2022-01-10 03:26:31,317 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2022-01-10 03:26:31,317 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2022-01-10 03:26:31,318 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2022-01-10 03:26:31,318 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2022-01-10 03:26:31,318 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2022-01-10 03:26:31,318 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-01-10 03:26:31,318 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2022-01-10 03:26:31,318 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2022-01-10 03:26:31,318 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2022-01-10 03:26:31,318 INFO  L138        SettingsManager]:  * Trace refinement strategy=WOLF
[2022-01-10 03:26:31,318 INFO  L138        SettingsManager]:  * Command for external solver=cvc4 --incremental --print-success --lang smt 
[2022-01-10 03:26:31,318 INFO  L138        SettingsManager]:  * Large block encoding in concurrent analysis=OFF
[2022-01-10 03:26:31,318 INFO  L138        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2022-01-10 03:26:31,318 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2022-01-10 03:26:31,319 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2022-01-10 03:26:31,319 INFO  L138        SettingsManager]:  * Logic for external solver=AUFBV
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int)
WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN;
[2022-01-10 03:26:31,473 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2022-01-10 03:26:31,485 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2022-01-10 03:26:31,486 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2022-01-10 03:26:31,487 INFO  L271        PluginConnector]: Initializing CDTParser...
[2022-01-10 03:26:31,488 INFO  L275        PluginConnector]: CDTParser initialized
[2022-01-10 03:26:31,488 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_valuebound1.c
[2022-01-10 03:26:31,527 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/553eed95e/f99922974d4146628e5b991b6e5f4ea8/FLAGa736647a5
[2022-01-10 03:26:31,917 INFO  L306              CDTParser]: Found 1 translation units.
[2022-01-10 03:26:31,918 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_valuebound1.c
[2022-01-10 03:26:31,936 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/553eed95e/f99922974d4146628e5b991b6e5f4ea8/FLAGa736647a5
[2022-01-10 03:26:31,948 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/553eed95e/f99922974d4146628e5b991b6e5f4ea8
[2022-01-10 03:26:31,950 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2022-01-10 03:26:31,952 INFO  L131        ToolchainWalker]: Walking toolchain with 5 elements.
[2022-01-10 03:26:31,954 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2022-01-10 03:26:31,954 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2022-01-10 03:26:31,956 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2022-01-10 03:26:31,957 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 03:26:31" (1/1) ...
[2022-01-10 03:26:31,957 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1117b9f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:26:31, skipping insertion in model container
[2022-01-10 03:26:31,957 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 03:26:31" (1/1) ...
[2022-01-10 03:26:31,961 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2022-01-10 03:26:31,976 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2022-01-10 03:26:32,155 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/prod4br-ll_valuebound1.c[524,537]
[2022-01-10 03:26:32,192 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-01-10 03:26:32,205 INFO  L203         MainTranslator]: Completed pre-run
[2022-01-10 03:26:32,212 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/prod4br-ll_valuebound1.c[524,537]
[2022-01-10 03:26:32,218 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-01-10 03:26:32,226 INFO  L208         MainTranslator]: Completed translation
[2022-01-10 03:26:32,226 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:26:32 WrapperNode
[2022-01-10 03:26:32,226 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2022-01-10 03:26:32,237 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2022-01-10 03:26:32,237 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2022-01-10 03:26:32,238 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2022-01-10 03:26:32,244 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:26:32" (1/1) ...
[2022-01-10 03:26:32,251 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:26:32" (1/1) ...
[2022-01-10 03:26:32,273 INFO  L137                Inliner]: procedures = 14, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 51
[2022-01-10 03:26:32,275 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2022-01-10 03:26:32,275 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2022-01-10 03:26:32,275 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2022-01-10 03:26:32,275 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2022-01-10 03:26:32,280 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:26:32" (1/1) ...
[2022-01-10 03:26:32,280 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:26:32" (1/1) ...
[2022-01-10 03:26:32,282 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:26:32" (1/1) ...
[2022-01-10 03:26:32,282 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:26:32" (1/1) ...
[2022-01-10 03:26:32,291 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:26:32" (1/1) ...
[2022-01-10 03:26:32,293 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:26:32" (1/1) ...
[2022-01-10 03:26:32,293 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:26:32" (1/1) ...
[2022-01-10 03:26:32,295 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2022-01-10 03:26:32,295 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2022-01-10 03:26:32,295 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2022-01-10 03:26:32,295 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2022-01-10 03:26:32,303 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:26:32" (1/1) ...
[2022-01-10 03:26:32,307 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-01-10 03:26:32,317 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-10 03:26:32,346 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2022-01-10 03:26:32,369 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2022-01-10 03:26:32,369 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1
[2022-01-10 03:26:32,369 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2022-01-10 03:26:32,369 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2022-01-10 03:26:32,369 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2022-01-10 03:26:32,370 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2022-01-10 03:26:32,370 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2022-01-10 03:26:32,370 INFO  L138     BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2022-01-10 03:26:32,381 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2022-01-10 03:26:32,407 INFO  L234             CfgBuilder]: Building ICFG
[2022-01-10 03:26:32,408 INFO  L260             CfgBuilder]: Building CFG for each procedure with an implementation
[2022-01-10 03:26:33,197 INFO  L275             CfgBuilder]: Performing block encoding
[2022-01-10 03:26:33,202 INFO  L294             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2022-01-10 03:26:33,202 INFO  L299             CfgBuilder]: Removed 1 assume(true) statements.
[2022-01-10 03:26:33,204 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 03:26:33 BoogieIcfgContainer
[2022-01-10 03:26:33,204 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2022-01-10 03:26:33,205 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2022-01-10 03:26:33,205 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2022-01-10 03:26:33,213 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2022-01-10 03:26:33,213 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 03:26:31" (1/3) ...
[2022-01-10 03:26:33,214 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b6f9ed8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 03:26:33, skipping insertion in model container
[2022-01-10 03:26:33,214 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:26:32" (2/3) ...
[2022-01-10 03:26:33,214 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b6f9ed8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 03:26:33, skipping insertion in model container
[2022-01-10 03:26:33,214 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 03:26:33" (3/3) ...
[2022-01-10 03:26:33,215 INFO  L111   eAbstractionObserver]: Analyzing ICFG prod4br-ll_valuebound1.c
[2022-01-10 03:26:33,220 INFO  L204   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2022-01-10 03:26:33,220 INFO  L163   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2022-01-10 03:26:33,259 INFO  L338      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2022-01-10 03:26:33,264 INFO  L339      AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR
[2022-01-10 03:26:33,265 INFO  L340      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2022-01-10 03:26:33,277 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 29 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 20 states have internal predecessors, (28), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6)
[2022-01-10 03:26:33,281 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 25
[2022-01-10 03:26:33,281 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 03:26:33,282 INFO  L514         BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 03:26:33,282 INFO  L402      AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 03:26:33,286 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 03:26:33,287 INFO  L85        PathProgramCache]: Analyzing trace with hash 1472905330, now seen corresponding path program 1 times
[2022-01-10 03:26:33,296 INFO  L121   FreeRefinementEngine]: Executing refinement strategy WOLF
[2022-01-10 03:26:33,297 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [402261323]
[2022-01-10 03:26:33,297 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 03:26:33,298 INFO  L168          SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3
[2022-01-10 03:26:33,298 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat
[2022-01-10 03:26:33,305 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null)
[2022-01-10 03:26:33,307 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process
[2022-01-10 03:26:33,395 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 03:26:33,408 INFO  L263         TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 1 conjunts are in the unsatisfiable core
[2022-01-10 03:26:33,412 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 03:26:33,525 INFO  L134       CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2022-01-10 03:26:33,526 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2022-01-10 03:26:33,526 INFO  L139   FreeRefinementEngine]: Strategy WOLF found an infeasible trace
[2022-01-10 03:26:33,526 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [402261323]
[2022-01-10 03:26:33,527 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleMathsat [402261323] provided 1 perfect and 0 imperfect interpolant sequences
[2022-01-10 03:26:33,527 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-01-10 03:26:33,527 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2022-01-10 03:26:33,528 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946597532]
[2022-01-10 03:26:33,528 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-10 03:26:33,531 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 2 states
[2022-01-10 03:26:33,531 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF
[2022-01-10 03:26:33,559 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2022-01-10 03:26:33,559 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2022-01-10 03:26:33,561 INFO  L87              Difference]: Start difference. First operand  has 29 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 20 states have internal predecessors, (28), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand  has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3)
[2022-01-10 03:26:33,580 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 03:26:33,580 INFO  L93              Difference]: Finished difference Result 55 states and 82 transitions.
[2022-01-10 03:26:33,581 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. 
[2022-01-10 03:26:33,582 INFO  L78                 Accepts]: Start accepts. Automaton has  has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24
[2022-01-10 03:26:33,582 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 03:26:33,587 INFO  L225             Difference]: With dead ends: 55
[2022-01-10 03:26:33,587 INFO  L226             Difference]: Without dead ends: 25
[2022-01-10 03:26:33,590 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2022-01-10 03:26:33,593 INFO  L933         BasicCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-01-10 03:26:33,594 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-01-10 03:26:33,605 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 25 states.
[2022-01-10 03:26:33,620 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25.
[2022-01-10 03:26:33,621 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 25 states, 16 states have (on average 1.3125) internal successors, (21), 17 states have internal predecessors, (21), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5)
[2022-01-10 03:26:33,622 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions.
[2022-01-10 03:26:33,623 INFO  L78                 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 24
[2022-01-10 03:26:33,623 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 03:26:33,623 INFO  L470      AbstractCegarLoop]: Abstraction has 25 states and 32 transitions.
[2022-01-10 03:26:33,623 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3)
[2022-01-10 03:26:33,623 INFO  L276                IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions.
[2022-01-10 03:26:33,625 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 25
[2022-01-10 03:26:33,625 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 03:26:33,625 INFO  L514         BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 03:26:33,648 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0
[2022-01-10 03:26:33,852 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3
[2022-01-10 03:26:33,853 INFO  L402      AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 03:26:33,854 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 03:26:33,854 INFO  L85        PathProgramCache]: Analyzing trace with hash 324198000, now seen corresponding path program 1 times
[2022-01-10 03:26:33,855 INFO  L121   FreeRefinementEngine]: Executing refinement strategy WOLF
[2022-01-10 03:26:33,855 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [733260367]
[2022-01-10 03:26:33,855 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 03:26:33,855 INFO  L168          SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3
[2022-01-10 03:26:33,855 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat
[2022-01-10 03:26:33,859 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null)
[2022-01-10 03:26:33,860 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process
[2022-01-10 03:26:33,984 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 03:26:33,996 INFO  L263         TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 16 conjunts are in the unsatisfiable core
[2022-01-10 03:26:33,998 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 03:26:34,463 INFO  L134       CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked.
[2022-01-10 03:26:34,463 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2022-01-10 03:26:34,463 INFO  L139   FreeRefinementEngine]: Strategy WOLF found an infeasible trace
[2022-01-10 03:26:34,463 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [733260367]
[2022-01-10 03:26:34,464 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleMathsat [733260367] provided 1 perfect and 0 imperfect interpolant sequences
[2022-01-10 03:26:34,464 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-01-10 03:26:34,464 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10
[2022-01-10 03:26:34,464 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145853673]
[2022-01-10 03:26:34,464 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-10 03:26:34,465 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 10 states
[2022-01-10 03:26:34,465 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF
[2022-01-10 03:26:34,465 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2022-01-10 03:26:34,466 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90
[2022-01-10 03:26:34,466 INFO  L87              Difference]: Start difference. First operand 25 states and 32 transitions. Second operand  has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 7 states have internal predecessors, (11), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3)
[2022-01-10 03:26:35,621 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 03:26:35,621 INFO  L93              Difference]: Finished difference Result 51 states and 69 transitions.
[2022-01-10 03:26:35,625 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2022-01-10 03:26:35,626 INFO  L78                 Accepts]: Start accepts. Automaton has  has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 7 states have internal predecessors, (11), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 24
[2022-01-10 03:26:35,626 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 03:26:35,627 INFO  L225             Difference]: With dead ends: 51
[2022-01-10 03:26:35,628 INFO  L226             Difference]: Without dead ends: 37
[2022-01-10 03:26:35,628 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132
[2022-01-10 03:26:35,629 INFO  L933         BasicCegarLoop]: 20 mSDtfsCounter, 26 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time
[2022-01-10 03:26:35,630 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 112 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time]
[2022-01-10 03:26:35,630 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 37 states.
[2022-01-10 03:26:35,635 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34.
[2022-01-10 03:26:35,635 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 34 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6)
[2022-01-10 03:26:35,636 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions.
[2022-01-10 03:26:35,636 INFO  L78                 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 24
[2022-01-10 03:26:35,636 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 03:26:35,636 INFO  L470      AbstractCegarLoop]: Abstraction has 34 states and 42 transitions.
[2022-01-10 03:26:35,636 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 7 states have internal predecessors, (11), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3)
[2022-01-10 03:26:35,636 INFO  L276                IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions.
[2022-01-10 03:26:35,637 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 31
[2022-01-10 03:26:35,637 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 03:26:35,637 INFO  L514         BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 03:26:35,649 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0
[2022-01-10 03:26:35,838 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3
[2022-01-10 03:26:35,838 INFO  L402      AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 03:26:35,839 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 03:26:35,839 INFO  L85        PathProgramCache]: Analyzing trace with hash 693549193, now seen corresponding path program 1 times
[2022-01-10 03:26:35,839 INFO  L121   FreeRefinementEngine]: Executing refinement strategy WOLF
[2022-01-10 03:26:35,840 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1992348701]
[2022-01-10 03:26:35,840 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 03:26:35,840 INFO  L168          SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3
[2022-01-10 03:26:35,840 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat
[2022-01-10 03:26:35,841 INFO  L229       MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null)
[2022-01-10 03:26:35,846 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process
[2022-01-10 03:26:35,935 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 03:26:35,949 INFO  L263         TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core
[2022-01-10 03:26:35,950 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 03:26:36,540 INFO  L134       CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked.
[2022-01-10 03:26:36,540 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2022-01-10 03:26:36,541 INFO  L139   FreeRefinementEngine]: Strategy WOLF found an infeasible trace
[2022-01-10 03:26:36,541 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1992348701]
[2022-01-10 03:26:36,541 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleMathsat [1992348701] provided 1 perfect and 0 imperfect interpolant sequences
[2022-01-10 03:26:36,541 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-01-10 03:26:36,541 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11
[2022-01-10 03:26:36,541 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500640631]
[2022-01-10 03:26:36,542 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-10 03:26:36,542 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 11 states
[2022-01-10 03:26:36,542 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF
[2022-01-10 03:26:36,542 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2022-01-10 03:26:36,543 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110
[2022-01-10 03:26:36,543 INFO  L87              Difference]: Start difference. First operand 34 states and 42 transitions. Second operand  has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4)
[2022-01-10 03:26:38,898 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 03:26:38,898 INFO  L93              Difference]: Finished difference Result 51 states and 66 transitions.
[2022-01-10 03:26:38,906 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. 
[2022-01-10 03:26:38,907 INFO  L78                 Accepts]: Start accepts. Automaton has  has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 30
[2022-01-10 03:26:38,907 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 03:26:38,908 INFO  L225             Difference]: With dead ends: 51
[2022-01-10 03:26:38,908 INFO  L226             Difference]: Without dead ends: 47
[2022-01-10 03:26:38,908 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182
[2022-01-10 03:26:38,909 INFO  L933         BasicCegarLoop]: 31 mSDtfsCounter, 45 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time
[2022-01-10 03:26:38,909 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 155 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time]
[2022-01-10 03:26:38,910 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 47 states.
[2022-01-10 03:26:38,914 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44.
[2022-01-10 03:26:38,914 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 44 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 32 states have internal predecessors, (38), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8)
[2022-01-10 03:26:38,915 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 55 transitions.
[2022-01-10 03:26:38,915 INFO  L78                 Accepts]: Start accepts. Automaton has 44 states and 55 transitions. Word has length 30
[2022-01-10 03:26:38,915 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 03:26:38,915 INFO  L470      AbstractCegarLoop]: Abstraction has 44 states and 55 transitions.
[2022-01-10 03:26:38,916 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4)
[2022-01-10 03:26:38,916 INFO  L276                IsEmpty]: Start isEmpty. Operand 44 states and 55 transitions.
[2022-01-10 03:26:38,916 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 35
[2022-01-10 03:26:38,916 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 03:26:38,916 INFO  L514         BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 03:26:38,930 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0
[2022-01-10 03:26:39,125 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3
[2022-01-10 03:26:39,126 INFO  L402      AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 03:26:39,126 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 03:26:39,126 INFO  L85        PathProgramCache]: Analyzing trace with hash 1144244799, now seen corresponding path program 1 times
[2022-01-10 03:26:39,127 INFO  L121   FreeRefinementEngine]: Executing refinement strategy WOLF
[2022-01-10 03:26:39,127 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1952375063]
[2022-01-10 03:26:39,127 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 03:26:39,127 INFO  L168          SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3
[2022-01-10 03:26:39,127 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat
[2022-01-10 03:26:39,128 INFO  L229       MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null)
[2022-01-10 03:26:39,130 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process
[2022-01-10 03:26:39,383 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 03:26:39,425 INFO  L263         TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core
[2022-01-10 03:26:39,427 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 03:26:39,798 INFO  L134       CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2022-01-10 03:26:39,799 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-01-10 03:26:40,182 INFO  L134       CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2022-01-10 03:26:40,183 INFO  L139   FreeRefinementEngine]: Strategy WOLF found an infeasible trace
[2022-01-10 03:26:40,183 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1952375063]
[2022-01-10 03:26:40,184 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleMathsat [1952375063] provided 0 perfect and 2 imperfect interpolant sequences
[2022-01-10 03:26:40,184 INFO  L186   FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2022-01-10 03:26:40,184 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11
[2022-01-10 03:26:40,184 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725184701]
[2022-01-10 03:26:40,185 INFO  L85    oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2022-01-10 03:26:40,185 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 11 states
[2022-01-10 03:26:40,185 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF
[2022-01-10 03:26:40,185 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2022-01-10 03:26:40,186 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110
[2022-01-10 03:26:40,186 INFO  L87              Difference]: Start difference. First operand 44 states and 55 transitions. Second operand  has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8)
[2022-01-10 03:26:40,721 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 03:26:40,721 INFO  L93              Difference]: Finished difference Result 58 states and 74 transitions.
[2022-01-10 03:26:40,730 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2022-01-10 03:26:40,731 INFO  L78                 Accepts]: Start accepts. Automaton has  has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) Word has length 34
[2022-01-10 03:26:40,731 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 03:26:40,732 INFO  L225             Difference]: With dead ends: 58
[2022-01-10 03:26:40,732 INFO  L226             Difference]: Without dead ends: 35
[2022-01-10 03:26:40,732 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156
[2022-01-10 03:26:40,733 INFO  L933         BasicCegarLoop]: 24 mSDtfsCounter, 8 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time
[2022-01-10 03:26:40,733 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 103 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 7 Unchecked, 0.5s Time]
[2022-01-10 03:26:40,735 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 35 states.
[2022-01-10 03:26:40,739 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35.
[2022-01-10 03:26:40,739 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 35 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 25 states have internal predecessors, (29), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6)
[2022-01-10 03:26:40,740 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions.
[2022-01-10 03:26:40,740 INFO  L78                 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 34
[2022-01-10 03:26:40,741 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 03:26:40,741 INFO  L470      AbstractCegarLoop]: Abstraction has 35 states and 42 transitions.
[2022-01-10 03:26:40,741 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8)
[2022-01-10 03:26:40,741 INFO  L276                IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions.
[2022-01-10 03:26:40,742 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 35
[2022-01-10 03:26:40,742 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 03:26:40,742 INFO  L514         BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 03:26:40,755 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0
[2022-01-10 03:26:40,944 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3
[2022-01-10 03:26:40,944 INFO  L402      AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 03:26:40,944 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 03:26:40,944 INFO  L85        PathProgramCache]: Analyzing trace with hash 1201503101, now seen corresponding path program 1 times
[2022-01-10 03:26:40,945 INFO  L121   FreeRefinementEngine]: Executing refinement strategy WOLF
[2022-01-10 03:26:40,945 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [150960553]
[2022-01-10 03:26:40,945 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 03:26:40,945 INFO  L168          SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3
[2022-01-10 03:26:40,945 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat
[2022-01-10 03:26:40,947 INFO  L229       MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null)
[2022-01-10 03:26:40,947 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process
[2022-01-10 03:26:41,152 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 03:26:41,182 INFO  L263         TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 20 conjunts are in the unsatisfiable core
[2022-01-10 03:26:41,184 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 03:26:43,212 INFO  L134       CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked.
[2022-01-10 03:26:43,212 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-01-10 03:27:09,333 INFO  L134       CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked.
[2022-01-10 03:27:09,334 INFO  L139   FreeRefinementEngine]: Strategy WOLF found an infeasible trace
[2022-01-10 03:27:09,334 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [150960553]
[2022-01-10 03:27:09,334 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleMathsat [150960553] provided 1 perfect and 1 imperfect interpolant sequences
[2022-01-10 03:27:09,334 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2022-01-10 03:27:09,334 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [12] total 16
[2022-01-10 03:27:09,334 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444836395]
[2022-01-10 03:27:09,334 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-10 03:27:09,334 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2022-01-10 03:27:09,334 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF
[2022-01-10 03:27:09,335 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2022-01-10 03:27:09,335 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240
[2022-01-10 03:27:09,335 INFO  L87              Difference]: Start difference. First operand 35 states and 42 transitions. Second operand  has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4)
[2022-01-10 03:27:18,888 WARN  L534   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers []
[2022-01-10 03:27:20,948 WARN  L534   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers []
[2022-01-10 03:27:23,933 WARN  L534   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers []
[2022-01-10 03:27:26,748 WARN  L534   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers []
[2022-01-10 03:27:30,894 WARN  L534   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers []
[2022-01-10 03:27:34,221 WARN  L534   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers []
[2022-01-10 03:27:42,080 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 03:27:42,081 INFO  L93              Difference]: Finished difference Result 49 states and 61 transitions.
[2022-01-10 03:27:42,128 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2022-01-10 03:27:42,128 INFO  L78                 Accepts]: Start accepts. Automaton has  has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34
[2022-01-10 03:27:42,129 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 03:27:42,129 INFO  L225             Difference]: With dead ends: 49
[2022-01-10 03:27:42,129 INFO  L226             Difference]: Without dead ends: 47
[2022-01-10 03:27:42,129 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 21.0s TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272
[2022-01-10 03:27:42,130 INFO  L933         BasicCegarLoop]: 23 mSDtfsCounter, 10 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.3s IncrementalHoareTripleChecker+Time
[2022-01-10 03:27:42,130 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 103 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 4 Unknown, 0 Unchecked, 31.3s Time]
[2022-01-10 03:27:42,131 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 47 states.
[2022-01-10 03:27:42,135 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45.
[2022-01-10 03:27:42,136 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 45 states, 32 states have (on average 1.28125) internal successors, (41), 33 states have internal predecessors, (41), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7)
[2022-01-10 03:27:42,136 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions.
[2022-01-10 03:27:42,136 INFO  L78                 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 34
[2022-01-10 03:27:42,136 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 03:27:42,137 INFO  L470      AbstractCegarLoop]: Abstraction has 45 states and 56 transitions.
[2022-01-10 03:27:42,137 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4)
[2022-01-10 03:27:42,137 INFO  L276                IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions.
[2022-01-10 03:27:42,137 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 41
[2022-01-10 03:27:42,137 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 03:27:42,137 INFO  L514         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 03:27:42,149 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0
[2022-01-10 03:27:42,341 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3
[2022-01-10 03:27:42,342 INFO  L402      AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 03:27:42,342 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 03:27:42,343 INFO  L85        PathProgramCache]: Analyzing trace with hash 1613273046, now seen corresponding path program 1 times
[2022-01-10 03:27:42,343 INFO  L121   FreeRefinementEngine]: Executing refinement strategy WOLF
[2022-01-10 03:27:42,343 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1920234670]
[2022-01-10 03:27:42,343 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 03:27:42,343 INFO  L168          SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3
[2022-01-10 03:27:42,343 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat
[2022-01-10 03:27:42,344 INFO  L229       MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null)
[2022-01-10 03:27:42,345 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process
[2022-01-10 03:27:42,558 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 03:27:42,588 INFO  L263         TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 20 conjunts are in the unsatisfiable core
[2022-01-10 03:27:42,590 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 03:27:44,878 INFO  L134       CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked.
[2022-01-10 03:27:44,878 INFO  L328         TraceCheckSpWp]: Computing backward predicates...