/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/AutomizerCInlineTransformed.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_LAZY.epf -i ../../../trunk/examples/svcomp/recursive-simple/sum_25x0-2.c


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


This is Ultimate 0.2.2-dev-a10ec3b
[2022-01-10 18:25:12,348 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2022-01-10 18:25:12,349 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2022-01-10 18:25:12,377 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2022-01-10 18:25:12,377 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2022-01-10 18:25:12,378 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2022-01-10 18:25:12,379 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2022-01-10 18:25:12,381 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2022-01-10 18:25:12,396 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2022-01-10 18:25:12,397 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
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[2022-01-10 18:25:12,398 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2022-01-10 18:25:12,399 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2022-01-10 18:25:12,400 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2022-01-10 18:25:12,400 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2022-01-10 18:25:12,401 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2022-01-10 18:25:12,402 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2022-01-10 18:25:12,402 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2022-01-10 18:25:12,404 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2022-01-10 18:25:12,405 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2022-01-10 18:25:12,406 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2022-01-10 18:25:12,409 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2022-01-10 18:25:12,410 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2022-01-10 18:25:12,410 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2022-01-10 18:25:12,412 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2022-01-10 18:25:12,412 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2022-01-10 18:25:12,412 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2022-01-10 18:25:12,413 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2022-01-10 18:25:12,413 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2022-01-10 18:25:12,414 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2022-01-10 18:25:12,414 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2022-01-10 18:25:12,414 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2022-01-10 18:25:12,415 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2022-01-10 18:25:12,415 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2022-01-10 18:25:12,416 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2022-01-10 18:25:12,416 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2022-01-10 18:25:12,416 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2022-01-10 18:25:12,417 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2022-01-10 18:25:12,417 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2022-01-10 18:25:12,417 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2022-01-10 18:25:12,418 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2022-01-10 18:25:12,423 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_LAZY.epf
[2022-01-10 18:25:12,439 INFO  L113        SettingsManager]: Loading preferences was successful
[2022-01-10 18:25:12,440 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2022-01-10 18:25:12,440 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2022-01-10 18:25:12,440 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2022-01-10 18:25:12,441 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2022-01-10 18:25:12,441 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2022-01-10 18:25:12,441 INFO  L138        SettingsManager]:  * Use SBE=true
[2022-01-10 18:25:12,441 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2022-01-10 18:25:12,441 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2022-01-10 18:25:12,442 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2022-01-10 18:25:12,442 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2022-01-10 18:25:12,442 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2022-01-10 18:25:12,443 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2022-01-10 18:25:12,443 INFO  L138        SettingsManager]:  * Adapt memory model on pointer casts if necessary=true
[2022-01-10 18:25:12,443 INFO  L138        SettingsManager]:  * Use bitvectors instead of ints=true
[2022-01-10 18:25:12,443 INFO  L138        SettingsManager]:  * Memory model=HoenickeLindenmann_4ByteResolution
[2022-01-10 18:25:12,443 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2022-01-10 18:25:12,443 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2022-01-10 18:25:12,443 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2022-01-10 18:25:12,443 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2022-01-10 18:25:12,443 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2022-01-10 18:25:12,443 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-01-10 18:25:12,444 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2022-01-10 18:25:12,444 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2022-01-10 18:25:12,444 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2022-01-10 18:25:12,444 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2022-01-10 18:25:12,444 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2022-01-10 18:25:12,444 INFO  L138        SettingsManager]:  * Large block encoding in concurrent analysis=OFF
[2022-01-10 18:25:12,444 INFO  L138        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2022-01-10 18:25:12,444 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2022-01-10 18:25:12,444 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2022-01-10 18:25:12,444 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2022-01-10 18:25:12,446 INFO  L136        SettingsManager]: Preferences of IcfgTransformer differ from their defaults:
[2022-01-10 18:25:12,446 INFO  L138        SettingsManager]:  * TransformationType=BV_TO_INT_LAZY
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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN;
[2022-01-10 18:25:12,632 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2022-01-10 18:25:12,650 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2022-01-10 18:25:12,652 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2022-01-10 18:25:12,653 INFO  L271        PluginConnector]: Initializing CDTParser...
[2022-01-10 18:25:12,653 INFO  L275        PluginConnector]: CDTParser initialized
[2022-01-10 18:25:12,654 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_25x0-2.c
[2022-01-10 18:25:12,696 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6255e207/98d7c60a70d8471f91de099d15911d15/FLAGcf68483e4
[2022-01-10 18:25:13,030 INFO  L306              CDTParser]: Found 1 translation units.
[2022-01-10 18:25:13,031 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/sum_25x0-2.c
[2022-01-10 18:25:13,035 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6255e207/98d7c60a70d8471f91de099d15911d15/FLAGcf68483e4
[2022-01-10 18:25:13,046 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6255e207/98d7c60a70d8471f91de099d15911d15
[2022-01-10 18:25:13,048 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2022-01-10 18:25:13,049 INFO  L131        ToolchainWalker]: Walking toolchain with 6 elements.
[2022-01-10 18:25:13,052 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2022-01-10 18:25:13,052 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2022-01-10 18:25:13,054 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2022-01-10 18:25:13,055 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:25:13" (1/1) ...
[2022-01-10 18:25:13,056 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29de0528 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:25:13, skipping insertion in model container
[2022-01-10 18:25:13,056 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:25:13" (1/1) ...
[2022-01-10 18:25:13,060 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2022-01-10 18:25:13,068 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2022-01-10 18:25:13,228 WARN  L230   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/sum_25x0-2.c[481,494]
[2022-01-10 18:25:13,229 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-01-10 18:25:13,241 INFO  L203         MainTranslator]: Completed pre-run
[2022-01-10 18:25:13,252 WARN  L230   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/sum_25x0-2.c[481,494]
[2022-01-10 18:25:13,253 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-01-10 18:25:13,263 INFO  L208         MainTranslator]: Completed translation
[2022-01-10 18:25:13,264 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:25:13 WrapperNode
[2022-01-10 18:25:13,264 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2022-01-10 18:25:13,265 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2022-01-10 18:25:13,265 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2022-01-10 18:25:13,265 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2022-01-10 18:25:13,270 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:25:13" (1/1) ...
[2022-01-10 18:25:13,275 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:25:13" (1/1) ...
[2022-01-10 18:25:13,285 INFO  L137                Inliner]: procedures = 12, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 19
[2022-01-10 18:25:13,286 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2022-01-10 18:25:13,286 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2022-01-10 18:25:13,286 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2022-01-10 18:25:13,286 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2022-01-10 18:25:13,291 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:25:13" (1/1) ...
[2022-01-10 18:25:13,291 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:25:13" (1/1) ...
[2022-01-10 18:25:13,295 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:25:13" (1/1) ...
[2022-01-10 18:25:13,295 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:25:13" (1/1) ...
[2022-01-10 18:25:13,302 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:25:13" (1/1) ...
[2022-01-10 18:25:13,304 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:25:13" (1/1) ...
[2022-01-10 18:25:13,307 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:25:13" (1/1) ...
[2022-01-10 18:25:13,309 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2022-01-10 18:25:13,309 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2022-01-10 18:25:13,309 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2022-01-10 18:25:13,310 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2022-01-10 18:25:13,310 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:25:13" (1/1) ...
[2022-01-10 18:25:13,321 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-01-10 18:25:13,329 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-10 18:25:13,339 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 18:25:13,359 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 18:25:13,365 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2022-01-10 18:25:13,365 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2022-01-10 18:25:13,365 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2022-01-10 18:25:13,365 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1
[2022-01-10 18:25:13,366 INFO  L130     BoogieDeclarations]: Found specification of procedure sum
[2022-01-10 18:25:13,366 INFO  L138     BoogieDeclarations]: Found implementation of procedure sum
[2022-01-10 18:25:13,410 INFO  L234             CfgBuilder]: Building ICFG
[2022-01-10 18:25:13,411 INFO  L260             CfgBuilder]: Building CFG for each procedure with an implementation
[2022-01-10 18:25:13,502 INFO  L275             CfgBuilder]: Performing block encoding
[2022-01-10 18:25:13,505 INFO  L294             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2022-01-10 18:25:13,505 INFO  L299             CfgBuilder]: Removed 0 assume(true) statements.
[2022-01-10 18:25:13,507 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:25:13 BoogieIcfgContainer
[2022-01-10 18:25:13,507 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2022-01-10 18:25:13,507 INFO  L113        PluginConnector]: ------------------------IcfgTransformer----------------------------
[2022-01-10 18:25:13,507 INFO  L271        PluginConnector]: Initializing IcfgTransformer...
[2022-01-10 18:25:13,510 INFO  L275        PluginConnector]: IcfgTransformer initialized
[2022-01-10 18:25:13,512 INFO  L185        PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:25:13" (1/1) ...
[2022-01-10 18:25:13,564 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 06:25:13 BasicIcfg
[2022-01-10 18:25:13,564 INFO  L132        PluginConnector]: ------------------------ END IcfgTransformer----------------------------
[2022-01-10 18:25:13,566 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2022-01-10 18:25:13,566 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2022-01-10 18:25:13,572 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2022-01-10 18:25:13,572 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 06:25:13" (1/4) ...
[2022-01-10 18:25:13,573 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b04daef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:25:13, skipping insertion in model container
[2022-01-10 18:25:13,573 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:25:13" (2/4) ...
[2022-01-10 18:25:13,573 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b04daef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:25:13, skipping insertion in model container
[2022-01-10 18:25:13,587 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:25:13" (3/4) ...
[2022-01-10 18:25:13,587 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b04daef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 06:25:13, skipping insertion in model container
[2022-01-10 18:25:13,587 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 06:25:13" (4/4) ...
[2022-01-10 18:25:13,588 INFO  L111   eAbstractionObserver]: Analyzing ICFG sum_25x0-2.cTransformedIcfg
[2022-01-10 18:25:13,592 INFO  L204   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2022-01-10 18:25:13,592 INFO  L163   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2022-01-10 18:25:13,620 INFO  L338      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2022-01-10 18:25:13,627 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 18:25:13,627 INFO  L340      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2022-01-10 18:25:13,640 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2022-01-10 18:25:13,643 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 11
[2022-01-10 18:25:13,643 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 18:25:13,643 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 18:25:13,644 INFO  L402      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 18:25:13,647 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 18:25:13,648 INFO  L85        PathProgramCache]: Analyzing trace with hash 534385216, now seen corresponding path program 1 times
[2022-01-10 18:25:13,654 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 18:25:13,654 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234718993]
[2022-01-10 18:25:13,655 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 18:25:13,655 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 18:25:13,740 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 18:25:13,800 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2022-01-10 18:25:13,809 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 18:25:13,878 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 18:25:13,878 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 18:25:13,878 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234718993]
[2022-01-10 18:25:13,879 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234718993] provided 1 perfect and 0 imperfect interpolant sequences
[2022-01-10 18:25:13,879 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-01-10 18:25:13,879 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2022-01-10 18:25:13,880 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319910563]
[2022-01-10 18:25:13,881 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-10 18:25:13,883 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2022-01-10 18:25:13,884 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-10 18:25:13,901 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2022-01-10 18:25:13,902 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2022-01-10 18:25:13,903 INFO  L87              Difference]: Start difference. First operand  has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand  has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2022-01-10 18:25:13,973 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 18:25:13,973 INFO  L93              Difference]: Finished difference Result 25 states and 28 transitions.
[2022-01-10 18:25:13,976 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2022-01-10 18:25:13,977 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10
[2022-01-10 18:25:13,977 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 18:25:13,982 INFO  L225             Difference]: With dead ends: 25
[2022-01-10 18:25:13,982 INFO  L226             Difference]: Without dead ends: 15
[2022-01-10 18:25:13,984 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2022-01-10 18:25:13,987 INFO  L933         BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-01-10 18:25:13,987 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 30 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-01-10 18:25:14,001 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 15 states.
[2022-01-10 18:25:14,011 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15.
[2022-01-10 18:25:14,027 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 15 states, 10 states have (on average 1.1) internal successors, (11), 11 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3)
[2022-01-10 18:25:14,028 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions.
[2022-01-10 18:25:14,029 INFO  L78                 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10
[2022-01-10 18:25:14,029 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 18:25:14,029 INFO  L470      AbstractCegarLoop]: Abstraction has 15 states and 16 transitions.
[2022-01-10 18:25:14,030 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2022-01-10 18:25:14,030 INFO  L276                IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions.
[2022-01-10 18:25:14,030 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 17
[2022-01-10 18:25:14,031 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 18:25:14,031 INFO  L514         BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 18:25:14,031 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2022-01-10 18:25:14,031 INFO  L402      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 18:25:14,032 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 18:25:14,032 INFO  L85        PathProgramCache]: Analyzing trace with hash 38585541, now seen corresponding path program 1 times
[2022-01-10 18:25:14,032 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 18:25:14,032 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451992918]
[2022-01-10 18:25:14,032 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 18:25:14,032 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 18:25:14,078 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 18:25:14,108 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2022-01-10 18:25:14,121 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 18:25:14,165 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2022-01-10 18:25:14,176 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 18:25:14,206 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-01-10 18:25:14,206 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 18:25:14,206 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451992918]
[2022-01-10 18:25:14,207 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451992918] provided 0 perfect and 1 imperfect interpolant sequences
[2022-01-10 18:25:14,207 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642351367]
[2022-01-10 18:25:14,207 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 18:25:14,207 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-10 18:25:14,207 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-10 18:25:14,209 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)
[2022-01-10 18:25:14,210 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2022-01-10 18:25:14,300 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 18:25:14,303 INFO  L263         TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 11 conjunts are in the unsatisfiable core
[2022-01-10 18:25:14,307 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 18:25:14,579 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2022-01-10 18:25:14,580 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-01-10 18:25:14,895 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-01-10 18:25:14,898 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [642351367] provided 0 perfect and 2 imperfect interpolant sequences
[2022-01-10 18:25:14,898 INFO  L186   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-01-10 18:25:14,899 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 12
[2022-01-10 18:25:14,899 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610732503]
[2022-01-10 18:25:14,900 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-01-10 18:25:14,900 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 12 states
[2022-01-10 18:25:14,900 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-10 18:25:14,901 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants.
[2022-01-10 18:25:14,901 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132
[2022-01-10 18:25:14,902 INFO  L87              Difference]: Start difference. First operand 15 states and 16 transitions. Second operand  has 12 states, 10 states have (on average 2.1) internal successors, (21), 12 states have internal predecessors, (21), 5 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6)
[2022-01-10 18:25:15,003 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 18:25:15,003 INFO  L93              Difference]: Finished difference Result 22 states and 23 transitions.
[2022-01-10 18:25:15,005 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2022-01-10 18:25:15,005 INFO  L78                 Accepts]: Start accepts. Automaton has  has 12 states, 10 states have (on average 2.1) internal successors, (21), 12 states have internal predecessors, (21), 5 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Word has length 16
[2022-01-10 18:25:15,006 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 18:25:15,006 INFO  L225             Difference]: With dead ends: 22
[2022-01-10 18:25:15,006 INFO  L226             Difference]: Without dead ends: 18
[2022-01-10 18:25:15,007 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182
[2022-01-10 18:25:15,007 INFO  L933         BasicCegarLoop]: 10 mSDtfsCounter, 22 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-01-10 18:25:15,008 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 40 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-01-10 18:25:15,008 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 18 states.
[2022-01-10 18:25:15,011 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18.
[2022-01-10 18:25:15,012 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 18 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 13 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4)
[2022-01-10 18:25:15,012 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions.
[2022-01-10 18:25:15,012 INFO  L78                 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16
[2022-01-10 18:25:15,012 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 18:25:15,012 INFO  L470      AbstractCegarLoop]: Abstraction has 18 states and 19 transitions.
[2022-01-10 18:25:15,013 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 12 states, 10 states have (on average 2.1) internal successors, (21), 12 states have internal predecessors, (21), 5 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6)
[2022-01-10 18:25:15,013 INFO  L276                IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions.
[2022-01-10 18:25:15,013 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 23
[2022-01-10 18:25:15,013 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 18:25:15,013 INFO  L514         BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 18:25:15,031 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0
[2022-01-10 18:25:15,214 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-10 18:25:15,214 INFO  L402      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 18:25:15,215 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 18:25:15,215 INFO  L85        PathProgramCache]: Analyzing trace with hash -1495575968, now seen corresponding path program 2 times
[2022-01-10 18:25:15,215 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 18:25:15,215 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106573445]
[2022-01-10 18:25:15,215 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 18:25:15,215 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 18:25:15,239 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 18:25:15,280 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2022-01-10 18:25:15,291 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 18:25:15,323 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2022-01-10 18:25:15,331 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 18:25:15,394 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2022-01-10 18:25:15,416 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 18:25:15,453 INFO  L134       CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked.
[2022-01-10 18:25:15,453 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 18:25:15,453 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106573445]
[2022-01-10 18:25:15,455 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106573445] provided 0 perfect and 1 imperfect interpolant sequences
[2022-01-10 18:25:15,456 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681832768]
[2022-01-10 18:25:15,456 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2022-01-10 18:25:15,456 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-10 18:25:15,457 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-10 18:25:15,457 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)
[2022-01-10 18:25:15,458 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2022-01-10 18:25:15,530 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2022-01-10 18:25:15,530 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-01-10 18:25:15,531 INFO  L263         TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 18 conjunts are in the unsatisfiable core
[2022-01-10 18:25:15,533 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 18:25:16,425 INFO  L134       CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2022-01-10 18:25:16,426 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-01-10 18:25:21,883 INFO  L134       CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked.
[2022-01-10 18:25:21,883 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [681832768] provided 0 perfect and 2 imperfect interpolant sequences
[2022-01-10 18:25:21,883 INFO  L186   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-01-10 18:25:21,883 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 23
[2022-01-10 18:25:21,884 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113148953]
[2022-01-10 18:25:21,884 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-01-10 18:25:21,884 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 23 states
[2022-01-10 18:25:21,884 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-10 18:25:21,885 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants.
[2022-01-10 18:25:21,885 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=415, Unknown=1, NotChecked=0, Total=506
[2022-01-10 18:25:21,885 INFO  L87              Difference]: Start difference. First operand 18 states and 19 transitions. Second operand  has 23 states, 18 states have (on average 2.0) internal successors, (36), 23 states have internal predecessors, (36), 7 states have call successors, (7), 1 states have call predecessors, (7), 9 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9)
[2022-01-10 18:25:22,762 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 18:25:22,763 INFO  L93              Difference]: Finished difference Result 28 states and 30 transitions.
[2022-01-10 18:25:22,763 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2022-01-10 18:25:22,763 INFO  L78                 Accepts]: Start accepts. Automaton has  has 23 states, 18 states have (on average 2.0) internal successors, (36), 23 states have internal predecessors, (36), 7 states have call successors, (7), 1 states have call predecessors, (7), 9 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 22
[2022-01-10 18:25:22,763 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 18:25:22,764 INFO  L225             Difference]: With dead ends: 28
[2022-01-10 18:25:22,764 INFO  L226             Difference]: Without dead ends: 24
[2022-01-10 18:25:22,764 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=147, Invalid=554, Unknown=1, NotChecked=0, Total=702
[2022-01-10 18:25:22,765 INFO  L933         BasicCegarLoop]: 13 mSDtfsCounter, 56 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time
[2022-01-10 18:25:22,765 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 88 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 73 Invalid, 0 Unknown, 1 Unchecked, 0.6s Time]
[2022-01-10 18:25:22,766 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24 states.
[2022-01-10 18:25:22,768 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21.
[2022-01-10 18:25:22,768 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 21 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 15 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5)
[2022-01-10 18:25:22,769 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions.
[2022-01-10 18:25:22,769 INFO  L78                 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 22
[2022-01-10 18:25:22,769 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 18:25:22,769 INFO  L470      AbstractCegarLoop]: Abstraction has 21 states and 22 transitions.
[2022-01-10 18:25:22,769 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 23 states, 18 states have (on average 2.0) internal successors, (36), 23 states have internal predecessors, (36), 7 states have call successors, (7), 1 states have call predecessors, (7), 9 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9)
[2022-01-10 18:25:22,769 INFO  L276                IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions.
[2022-01-10 18:25:22,770 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 29
[2022-01-10 18:25:22,770 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 18:25:22,770 INFO  L514         BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 18:25:22,789 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0
[2022-01-10 18:25:22,979 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2
[2022-01-10 18:25:22,980 INFO  L402      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 18:25:22,980 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 18:25:22,980 INFO  L85        PathProgramCache]: Analyzing trace with hash -278563547, now seen corresponding path program 3 times
[2022-01-10 18:25:22,980 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 18:25:22,980 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130918260]
[2022-01-10 18:25:22,980 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 18:25:22,981 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 18:25:23,000 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 18:25:23,049 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2022-01-10 18:25:23,059 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 18:25:23,087 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2022-01-10 18:25:23,101 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 18:25:23,167 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2022-01-10 18:25:23,179 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 18:25:23,258 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2022-01-10 18:25:23,261 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 18:25:23,285 INFO  L134       CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked.
[2022-01-10 18:25:23,285 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 18:25:23,285 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130918260]
[2022-01-10 18:25:23,285 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130918260] provided 0 perfect and 1 imperfect interpolant sequences
[2022-01-10 18:25:23,285 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172010602]
[2022-01-10 18:25:23,285 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2022-01-10 18:25:23,285 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-10 18:25:23,286 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-10 18:25:23,286 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)
[2022-01-10 18:25:23,288 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2022-01-10 18:25:23,371 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s)
[2022-01-10 18:25:23,371 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-01-10 18:25:23,372 INFO  L263         TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 48 conjunts are in the unsatisfiable core
[2022-01-10 18:25:23,374 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 18:25:24,144 INFO  L134       CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked.
[2022-01-10 18:25:24,145 INFO  L328         TraceCheckSpWp]: Computing backward predicates...