/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/array-crafted/zero_sum4.c


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


This is Ultimate 0.2.2-dev-a10ec3b
[2022-01-10 15:33:42,245 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2022-01-10 15:33:42,247 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2022-01-10 15:33:42,313 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2022-01-10 15:33:42,313 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2022-01-10 15:33:42,314 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2022-01-10 15:33:42,315 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2022-01-10 15:33:42,330 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2022-01-10 15:33:42,331 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2022-01-10 15:33:42,331 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
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[2022-01-10 15:33:42,332 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2022-01-10 15:33:42,333 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2022-01-10 15:33:42,333 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2022-01-10 15:33:42,334 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2022-01-10 15:33:42,335 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2022-01-10 15:33:42,335 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2022-01-10 15:33:42,336 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2022-01-10 15:33:42,337 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2022-01-10 15:33:42,338 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2022-01-10 15:33:42,339 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2022-01-10 15:33:42,340 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2022-01-10 15:33:42,340 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2022-01-10 15:33:42,341 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2022-01-10 15:33:42,342 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2022-01-10 15:33:42,343 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2022-01-10 15:33:42,343 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2022-01-10 15:33:42,343 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2022-01-10 15:33:42,343 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2022-01-10 15:33:42,344 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2022-01-10 15:33:42,344 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2022-01-10 15:33:42,345 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2022-01-10 15:33:42,345 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2022-01-10 15:33:42,346 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2022-01-10 15:33:42,346 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2022-01-10 15:33:42,346 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2022-01-10 15:33:42,347 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2022-01-10 15:33:42,347 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2022-01-10 15:33:42,347 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2022-01-10 15:33:42,347 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2022-01-10 15:33:42,348 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2022-01-10 15:33:42,349 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 15:33:42,361 INFO  L113        SettingsManager]: Loading preferences was successful
[2022-01-10 15:33:42,361 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2022-01-10 15:33:42,361 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2022-01-10 15:33:42,362 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2022-01-10 15:33:42,362 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2022-01-10 15:33:42,362 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2022-01-10 15:33:42,362 INFO  L138        SettingsManager]:  * Use SBE=true
[2022-01-10 15:33:42,363 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2022-01-10 15:33:42,363 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2022-01-10 15:33:42,363 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2022-01-10 15:33:42,363 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2022-01-10 15:33:42,363 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2022-01-10 15:33:42,363 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2022-01-10 15:33:42,363 INFO  L138        SettingsManager]:  * Adapt memory model on pointer casts if necessary=true
[2022-01-10 15:33:42,363 INFO  L138        SettingsManager]:  * Use bitvectors instead of ints=true
[2022-01-10 15:33:42,363 INFO  L138        SettingsManager]:  * Memory model=HoenickeLindenmann_4ByteResolution
[2022-01-10 15:33:42,364 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2022-01-10 15:33:42,364 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2022-01-10 15:33:42,364 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2022-01-10 15:33:42,364 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2022-01-10 15:33:42,364 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2022-01-10 15:33:42,364 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-01-10 15:33:42,364 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2022-01-10 15:33:42,364 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2022-01-10 15:33:42,364 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2022-01-10 15:33:42,365 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2022-01-10 15:33:42,365 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2022-01-10 15:33:42,365 INFO  L138        SettingsManager]:  * Large block encoding in concurrent analysis=OFF
[2022-01-10 15:33:42,365 INFO  L138        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2022-01-10 15:33:42,365 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2022-01-10 15:33:42,365 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2022-01-10 15:33:42,365 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2022-01-10 15:33:42,366 INFO  L136        SettingsManager]: Preferences of IcfgTransformer differ from their defaults:
[2022-01-10 15:33:42,366 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN;
[2022-01-10 15:33:42,528 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2022-01-10 15:33:42,540 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2022-01-10 15:33:42,541 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2022-01-10 15:33:42,542 INFO  L271        PluginConnector]: Initializing CDTParser...
[2022-01-10 15:33:42,547 INFO  L275        PluginConnector]: CDTParser initialized
[2022-01-10 15:33:42,548 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum4.c
[2022-01-10 15:33:42,595 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f53e8f5fb/eace619bb7834e4da30fa0462162b8e6/FLAG232921e83
[2022-01-10 15:33:42,948 INFO  L306              CDTParser]: Found 1 translation units.
[2022-01-10 15:33:42,948 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum4.c
[2022-01-10 15:33:42,952 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f53e8f5fb/eace619bb7834e4da30fa0462162b8e6/FLAG232921e83
[2022-01-10 15:33:43,397 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f53e8f5fb/eace619bb7834e4da30fa0462162b8e6
[2022-01-10 15:33:43,398 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2022-01-10 15:33:43,399 INFO  L131        ToolchainWalker]: Walking toolchain with 6 elements.
[2022-01-10 15:33:43,400 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2022-01-10 15:33:43,400 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2022-01-10 15:33:43,402 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2022-01-10 15:33:43,403 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 03:33:43" (1/1) ...
[2022-01-10 15:33:43,403 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e8b30f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:33:43, skipping insertion in model container
[2022-01-10 15:33:43,403 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 03:33:43" (1/1) ...
[2022-01-10 15:33:43,407 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2022-01-10 15:33:43,416 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2022-01-10 15:33:43,571 WARN  L230   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum4.c[400,413]
[2022-01-10 15:33:43,609 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-01-10 15:33:43,630 INFO  L203         MainTranslator]: Completed pre-run
[2022-01-10 15:33:43,638 WARN  L230   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum4.c[400,413]
[2022-01-10 15:33:43,657 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-01-10 15:33:43,665 INFO  L208         MainTranslator]: Completed translation
[2022-01-10 15:33:43,666 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:33:43 WrapperNode
[2022-01-10 15:33:43,666 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2022-01-10 15:33:43,667 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2022-01-10 15:33:43,667 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2022-01-10 15:33:43,667 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2022-01-10 15:33:43,674 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:33:43" (1/1) ...
[2022-01-10 15:33:43,679 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:33:43" (1/1) ...
[2022-01-10 15:33:43,692 INFO  L137                Inliner]: procedures = 17, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 125
[2022-01-10 15:33:43,692 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2022-01-10 15:33:43,693 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2022-01-10 15:33:43,693 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2022-01-10 15:33:43,693 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2022-01-10 15:33:43,698 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:33:43" (1/1) ...
[2022-01-10 15:33:43,698 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:33:43" (1/1) ...
[2022-01-10 15:33:43,705 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:33:43" (1/1) ...
[2022-01-10 15:33:43,705 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:33:43" (1/1) ...
[2022-01-10 15:33:43,710 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:33:43" (1/1) ...
[2022-01-10 15:33:43,713 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:33:43" (1/1) ...
[2022-01-10 15:33:43,714 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:33:43" (1/1) ...
[2022-01-10 15:33:43,716 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2022-01-10 15:33:43,717 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2022-01-10 15:33:43,717 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2022-01-10 15:33:43,717 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2022-01-10 15:33:43,732 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:33:43" (1/1) ...
[2022-01-10 15:33:43,738 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-01-10 15:33:43,747 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-10 15:33:43,759 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 15:33:43,775 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 15:33:43,806 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2022-01-10 15:33:43,806 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1
[2022-01-10 15:33:43,806 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2022-01-10 15:33:43,806 INFO  L130     BoogieDeclarations]: Found specification of procedure read~intINTTYPE2
[2022-01-10 15:33:43,807 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2022-01-10 15:33:43,807 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2022-01-10 15:33:43,807 INFO  L130     BoogieDeclarations]: Found specification of procedure write~intINTTYPE2
[2022-01-10 15:33:43,808 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2022-01-10 15:33:43,876 INFO  L234             CfgBuilder]: Building ICFG
[2022-01-10 15:33:43,877 INFO  L260             CfgBuilder]: Building CFG for each procedure with an implementation
[2022-01-10 15:33:44,098 INFO  L275             CfgBuilder]: Performing block encoding
[2022-01-10 15:33:44,102 INFO  L294             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2022-01-10 15:33:44,102 INFO  L299             CfgBuilder]: Removed 9 assume(true) statements.
[2022-01-10 15:33:44,103 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 03:33:44 BoogieIcfgContainer
[2022-01-10 15:33:44,104 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2022-01-10 15:33:44,104 INFO  L113        PluginConnector]: ------------------------IcfgTransformer----------------------------
[2022-01-10 15:33:44,104 INFO  L271        PluginConnector]: Initializing IcfgTransformer...
[2022-01-10 15:33:44,105 INFO  L275        PluginConnector]: IcfgTransformer initialized
[2022-01-10 15:33:44,107 INFO  L185        PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 03:33:44" (1/1) ...
[2022-01-10 15:33:44,232 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 03:33:44 BasicIcfg
[2022-01-10 15:33:44,232 INFO  L132        PluginConnector]: ------------------------ END IcfgTransformer----------------------------
[2022-01-10 15:33:44,233 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2022-01-10 15:33:44,233 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2022-01-10 15:33:44,235 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2022-01-10 15:33:44,235 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 03:33:43" (1/4) ...
[2022-01-10 15:33:44,236 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@128c4fe9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 03:33:44, skipping insertion in model container
[2022-01-10 15:33:44,236 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:33:43" (2/4) ...
[2022-01-10 15:33:44,236 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@128c4fe9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 03:33:44, skipping insertion in model container
[2022-01-10 15:33:44,236 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 03:33:44" (3/4) ...
[2022-01-10 15:33:44,236 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@128c4fe9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 03:33:44, skipping insertion in model container
[2022-01-10 15:33:44,237 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 03:33:44" (4/4) ...
[2022-01-10 15:33:44,237 INFO  L111   eAbstractionObserver]: Analyzing ICFG zero_sum4.cTransformedIcfg
[2022-01-10 15:33:44,240 INFO  L204   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2022-01-10 15:33:44,240 INFO  L163   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2022-01-10 15:33:44,266 INFO  L338      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2022-01-10 15:33:44,271 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 15:33:44,272 INFO  L340      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2022-01-10 15:33:44,282 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 38 states, 36 states have (on average 1.5833333333333333) internal successors, (57), 37 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 15:33:44,285 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 24
[2022-01-10 15:33:44,285 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 15:33:44,286 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 15:33:44,286 INFO  L402      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 15:33:44,292 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 15:33:44,292 INFO  L85        PathProgramCache]: Analyzing trace with hash -1598696621, now seen corresponding path program 1 times
[2022-01-10 15:33:44,297 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 15:33:44,298 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406247289]
[2022-01-10 15:33:44,298 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 15:33:44,298 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 15:33:44,393 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 15:33:44,455 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 15:33:44,455 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 15:33:44,456 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406247289]
[2022-01-10 15:33:44,456 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406247289] provided 1 perfect and 0 imperfect interpolant sequences
[2022-01-10 15:33:44,456 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-01-10 15:33:44,456 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2022-01-10 15:33:44,457 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889704238]
[2022-01-10 15:33:44,459 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-10 15:33:44,461 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 2 states
[2022-01-10 15:33:44,461 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-10 15:33:44,481 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2022-01-10 15:33:44,481 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2022-01-10 15:33:44,483 INFO  L87              Difference]: Start difference. First operand  has 38 states, 36 states have (on average 1.5833333333333333) internal successors, (57), 37 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand  has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 15:33:44,501 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 15:33:44,501 INFO  L93              Difference]: Finished difference Result 71 states and 106 transitions.
[2022-01-10 15:33:44,501 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. 
[2022-01-10 15:33:44,502 INFO  L78                 Accepts]: Start accepts. Automaton has  has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23
[2022-01-10 15:33:44,502 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 15:33:44,506 INFO  L225             Difference]: With dead ends: 71
[2022-01-10 15:33:44,506 INFO  L226             Difference]: Without dead ends: 33
[2022-01-10 15:33:44,508 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 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 15:33:44,510 INFO  L933         BasicCegarLoop]: 47 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, 47 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 15:33:44,512 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-01-10 15:33:44,521 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 33 states.
[2022-01-10 15:33:44,531 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33.
[2022-01-10 15:33:44,532 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 33 states, 32 states have (on average 1.28125) internal successors, (41), 32 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 15:33:44,533 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions.
[2022-01-10 15:33:44,534 INFO  L78                 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 23
[2022-01-10 15:33:44,534 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 15:33:44,534 INFO  L470      AbstractCegarLoop]: Abstraction has 33 states and 41 transitions.
[2022-01-10 15:33:44,534 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 15:33:44,535 INFO  L276                IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions.
[2022-01-10 15:33:44,536 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 24
[2022-01-10 15:33:44,536 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 15:33:44,536 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 15:33:44,536 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2022-01-10 15:33:44,537 INFO  L402      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 15:33:44,540 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 15:33:44,540 INFO  L85        PathProgramCache]: Analyzing trace with hash 1949690635, now seen corresponding path program 1 times
[2022-01-10 15:33:44,540 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 15:33:44,540 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384125194]
[2022-01-10 15:33:44,540 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 15:33:44,540 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 15:33:44,615 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 15:33:44,674 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 15:33:44,675 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 15:33:44,675 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384125194]
[2022-01-10 15:33:44,675 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384125194] provided 1 perfect and 0 imperfect interpolant sequences
[2022-01-10 15:33:44,675 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-01-10 15:33:44,675 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2022-01-10 15:33:44,675 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553593568]
[2022-01-10 15:33:44,675 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-10 15:33:44,677 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2022-01-10 15:33:44,677 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-10 15:33:44,677 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2022-01-10 15:33:44,678 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2022-01-10 15:33:44,678 INFO  L87              Difference]: Start difference. First operand 33 states and 41 transitions. Second operand  has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 15:33:44,826 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 15:33:44,827 INFO  L93              Difference]: Finished difference Result 52 states and 67 transitions.
[2022-01-10 15:33:44,827 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2022-01-10 15:33:44,827 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23
[2022-01-10 15:33:44,827 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 15:33:44,828 INFO  L225             Difference]: With dead ends: 52
[2022-01-10 15:33:44,828 INFO  L226             Difference]: Without dead ends: 48
[2022-01-10 15:33:44,828 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2022-01-10 15:33:44,829 INFO  L933         BasicCegarLoop]: 32 mSDtfsCounter, 3 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-01-10 15:33:44,829 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 89 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-01-10 15:33:44,830 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 48 states.
[2022-01-10 15:33:44,833 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48.
[2022-01-10 15:33:44,833 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 48 states, 47 states have (on average 1.3404255319148937) internal successors, (63), 47 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 15:33:44,834 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 63 transitions.
[2022-01-10 15:33:44,835 INFO  L78                 Accepts]: Start accepts. Automaton has 48 states and 63 transitions. Word has length 23
[2022-01-10 15:33:44,835 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 15:33:44,835 INFO  L470      AbstractCegarLoop]: Abstraction has 48 states and 63 transitions.
[2022-01-10 15:33:44,835 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 15:33:44,835 INFO  L276                IsEmpty]: Start isEmpty. Operand 48 states and 63 transitions.
[2022-01-10 15:33:44,836 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 26
[2022-01-10 15:33:44,836 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 15:33:44,836 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 15:33:44,836 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2022-01-10 15:33:44,836 INFO  L402      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 15:33:44,836 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 15:33:44,837 INFO  L85        PathProgramCache]: Analyzing trace with hash 1076395277, now seen corresponding path program 1 times
[2022-01-10 15:33:44,837 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 15:33:44,837 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138785036]
[2022-01-10 15:33:44,837 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 15:33:44,837 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 15:33:44,886 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 15:33:44,919 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-01-10 15:33:44,919 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 15:33:44,919 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138785036]
[2022-01-10 15:33:44,919 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138785036] provided 1 perfect and 0 imperfect interpolant sequences
[2022-01-10 15:33:44,919 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-01-10 15:33:44,920 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2022-01-10 15:33:44,920 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618780565]
[2022-01-10 15:33:44,920 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-10 15:33:44,920 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-01-10 15:33:44,920 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-10 15:33:44,920 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-01-10 15:33:44,921 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-01-10 15:33:44,921 INFO  L87              Difference]: Start difference. First operand 48 states and 63 transitions. Second operand  has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 15:33:45,072 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 15:33:45,073 INFO  L93              Difference]: Finished difference Result 93 states and 123 transitions.
[2022-01-10 15:33:45,073 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-01-10 15:33:45,073 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25
[2022-01-10 15:33:45,073 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 15:33:45,074 INFO  L225             Difference]: With dead ends: 93
[2022-01-10 15:33:45,074 INFO  L226             Difference]: Without dead ends: 50
[2022-01-10 15:33:45,074 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-01-10 15:33:45,075 INFO  L933         BasicCegarLoop]: 39 mSDtfsCounter, 1 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-01-10 15:33:45,075 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 58 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-01-10 15:33:45,076 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 50 states.
[2022-01-10 15:33:45,079 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49.
[2022-01-10 15:33:45,080 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 49 states, 48 states have (on average 1.3333333333333333) internal successors, (64), 48 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 15:33:45,080 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 64 transitions.
[2022-01-10 15:33:45,080 INFO  L78                 Accepts]: Start accepts. Automaton has 49 states and 64 transitions. Word has length 25
[2022-01-10 15:33:45,081 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 15:33:45,081 INFO  L470      AbstractCegarLoop]: Abstraction has 49 states and 64 transitions.
[2022-01-10 15:33:45,081 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 15:33:45,081 INFO  L276                IsEmpty]: Start isEmpty. Operand 49 states and 64 transitions.
[2022-01-10 15:33:45,081 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 28
[2022-01-10 15:33:45,081 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 15:33:45,082 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 15:33:45,082 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2022-01-10 15:33:45,082 INFO  L402      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 15:33:45,082 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 15:33:45,082 INFO  L85        PathProgramCache]: Analyzing trace with hash -1670825232, now seen corresponding path program 1 times
[2022-01-10 15:33:45,082 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 15:33:45,082 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197394950]
[2022-01-10 15:33:45,083 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 15:33:45,083 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 15:33:45,119 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 15:33:45,173 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2022-01-10 15:33:45,174 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 15:33:45,174 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197394950]
[2022-01-10 15:33:45,174 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197394950] provided 1 perfect and 0 imperfect interpolant sequences
[2022-01-10 15:33:45,174 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-01-10 15:33:45,174 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2022-01-10 15:33:45,174 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353168407]
[2022-01-10 15:33:45,175 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-10 15:33:45,176 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2022-01-10 15:33:45,177 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-10 15:33:45,177 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2022-01-10 15:33:45,177 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2022-01-10 15:33:45,178 INFO  L87              Difference]: Start difference. First operand 49 states and 64 transitions. Second operand  has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 15:33:45,441 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 15:33:45,441 INFO  L93              Difference]: Finished difference Result 88 states and 116 transitions.
[2022-01-10 15:33:45,443 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2022-01-10 15:33:45,443 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27
[2022-01-10 15:33:45,443 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 15:33:45,444 INFO  L225             Difference]: With dead ends: 88
[2022-01-10 15:33:45,444 INFO  L226             Difference]: Without dead ends: 50
[2022-01-10 15:33:45,444 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2022-01-10 15:33:45,445 INFO  L933         BasicCegarLoop]: 15 mSDtfsCounter, 36 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2022-01-10 15:33:45,445 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 19 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2022-01-10 15:33:45,446 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 50 states.
[2022-01-10 15:33:45,453 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42.
[2022-01-10 15:33:45,454 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 42 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 41 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 15:33:45,456 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions.
[2022-01-10 15:33:45,456 INFO  L78                 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 27
[2022-01-10 15:33:45,456 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 15:33:45,456 INFO  L470      AbstractCegarLoop]: Abstraction has 42 states and 50 transitions.
[2022-01-10 15:33:45,457 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 15:33:45,457 INFO  L276                IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions.
[2022-01-10 15:33:45,458 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 42
[2022-01-10 15:33:45,458 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 15:33:45,459 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 15:33:45,459 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2022-01-10 15:33:45,459 INFO  L402      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 15:33:45,459 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 15:33:45,459 INFO  L85        PathProgramCache]: Analyzing trace with hash -1885360033, now seen corresponding path program 1 times
[2022-01-10 15:33:45,459 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 15:33:45,460 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634492617]
[2022-01-10 15:33:45,460 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 15:33:45,460 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 15:33:45,548 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 15:33:45,589 INFO  L134       CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked.
[2022-01-10 15:33:45,589 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 15:33:45,589 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634492617]
[2022-01-10 15:33:45,589 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634492617] provided 0 perfect and 1 imperfect interpolant sequences
[2022-01-10 15:33:45,590 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997589280]
[2022-01-10 15:33:45,590 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 15:33:45,591 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-10 15:33:45,591 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-10 15:33:45,592 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 15:33:45,593 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 15:33:45,881 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 15:33:45,884 INFO  L263         TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 6 conjunts are in the unsatisfiable core
[2022-01-10 15:33:45,889 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 15:33:46,258 INFO  L134       CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked.
[2022-01-10 15:33:46,259 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-01-10 15:33:48,229 INFO  L134       CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked.
[2022-01-10 15:33:48,230 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [997589280] provided 0 perfect and 2 imperfect interpolant sequences
[2022-01-10 15:33:48,230 INFO  L186   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-01-10 15:33:48,230 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6
[2022-01-10 15:33:48,230 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065675898]
[2022-01-10 15:33:48,230 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-01-10 15:33:48,231 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2022-01-10 15:33:48,231 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-10 15:33:48,231 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2022-01-10 15:33:48,231 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30
[2022-01-10 15:33:48,231 INFO  L87              Difference]: Start difference. First operand 42 states and 50 transitions. Second operand  has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 15:33:48,463 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 15:33:48,464 INFO  L93              Difference]: Finished difference Result 81 states and 97 transitions.
[2022-01-10 15:33:48,467 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2022-01-10 15:33:48,468 INFO  L78                 Accepts]: Start accepts. Automaton has  has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41
[2022-01-10 15:33:48,468 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 15:33:48,468 INFO  L225             Difference]: With dead ends: 81
[2022-01-10 15:33:48,468 INFO  L226             Difference]: Without dead ends: 45
[2022-01-10 15:33:48,469 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30
[2022-01-10 15:33:48,469 INFO  L933         BasicCegarLoop]: 39 mSDtfsCounter, 3 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2022-01-10 15:33:48,469 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 77 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2022-01-10 15:33:48,470 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 45 states.
[2022-01-10 15:33:48,474 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44.
[2022-01-10 15:33:48,474 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 44 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 43 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 15:33:48,474 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions.
[2022-01-10 15:33:48,475 INFO  L78                 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 41
[2022-01-10 15:33:48,475 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 15:33:48,475 INFO  L470      AbstractCegarLoop]: Abstraction has 44 states and 52 transitions.
[2022-01-10 15:33:48,475 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 15:33:48,475 INFO  L276                IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions.
[2022-01-10 15:33:48,475 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 44
[2022-01-10 15:33:48,475 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 15:33:48,476 INFO  L514         BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 15:33:48,481 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 15:33:48,676 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-10 15:33:48,677 INFO  L402      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 15:33:48,677 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 15:33:48,677 INFO  L85        PathProgramCache]: Analyzing trace with hash 1533429826, now seen corresponding path program 2 times
[2022-01-10 15:33:48,677 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 15:33:48,677 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025653385]
[2022-01-10 15:33:48,677 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 15:33:48,678 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 15:33:48,803 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 15:33:48,874 INFO  L134       CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked.
[2022-01-10 15:33:48,874 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 15:33:48,875 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025653385]
[2022-01-10 15:33:48,875 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025653385] provided 0 perfect and 1 imperfect interpolant sequences
[2022-01-10 15:33:48,875 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378830955]
[2022-01-10 15:33:48,875 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2022-01-10 15:33:48,875 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-10 15:33:48,875 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-10 15:33:48,888 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 15:33:48,889 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 15:33:49,041 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2022-01-10 15:33:49,042 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-01-10 15:33:49,044 INFO  L263         TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 12 conjunts are in the unsatisfiable core
[2022-01-10 15:33:49,046 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 15:33:49,538 INFO  L134       CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked.
[2022-01-10 15:33:49,538 INFO  L328         TraceCheckSpWp]: Computing backward predicates...