/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-examples/standard_reverse_ground.i


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


This is Ultimate 0.2.2-dev-a10ec3b
[2022-01-10 15:20:04,972 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2022-01-10 15:20:04,973 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2022-01-10 15:20:05,010 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2022-01-10 15:20:05,010 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2022-01-10 15:20:05,019 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2022-01-10 15:20:05,020 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2022-01-10 15:20:05,021 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2022-01-10 15:20:05,022 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2022-01-10 15:20:05,023 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2022-01-10 15:20:05,023 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2022-01-10 15:20:05,024 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2022-01-10 15:20:05,024 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2022-01-10 15:20:05,025 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2022-01-10 15:20:05,026 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2022-01-10 15:20:05,027 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2022-01-10 15:20:05,027 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2022-01-10 15:20:05,028 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2022-01-10 15:20:05,029 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2022-01-10 15:20:05,031 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2022-01-10 15:20:05,032 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2022-01-10 15:20:05,033 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2022-01-10 15:20:05,034 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2022-01-10 15:20:05,035 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2022-01-10 15:20:05,038 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2022-01-10 15:20:05,038 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2022-01-10 15:20:05,038 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2022-01-10 15:20:05,039 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2022-01-10 15:20:05,040 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2022-01-10 15:20:05,040 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2022-01-10 15:20:05,041 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2022-01-10 15:20:05,041 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2022-01-10 15:20:05,042 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2022-01-10 15:20:05,043 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2022-01-10 15:20:05,043 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2022-01-10 15:20:05,044 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2022-01-10 15:20:05,044 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2022-01-10 15:20:05,045 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2022-01-10 15:20:05,045 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2022-01-10 15:20:05,045 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2022-01-10 15:20:05,046 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2022-01-10 15:20:05,047 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 15:20:05,080 INFO  L113        SettingsManager]: Loading preferences was successful
[2022-01-10 15:20:05,080 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2022-01-10 15:20:05,080 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2022-01-10 15:20:05,080 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2022-01-10 15:20:05,081 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2022-01-10 15:20:05,081 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2022-01-10 15:20:05,081 INFO  L138        SettingsManager]:  * Use SBE=true
[2022-01-10 15:20:05,081 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2022-01-10 15:20:05,081 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2022-01-10 15:20:05,082 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2022-01-10 15:20:05,082 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2022-01-10 15:20:05,082 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2022-01-10 15:20:05,082 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2022-01-10 15:20:05,082 INFO  L138        SettingsManager]:  * Adapt memory model on pointer casts if necessary=true
[2022-01-10 15:20:05,082 INFO  L138        SettingsManager]:  * Use bitvectors instead of ints=true
[2022-01-10 15:20:05,082 INFO  L138        SettingsManager]:  * Memory model=HoenickeLindenmann_4ByteResolution
[2022-01-10 15:20:05,082 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2022-01-10 15:20:05,083 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2022-01-10 15:20:05,083 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2022-01-10 15:20:05,098 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2022-01-10 15:20:05,099 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2022-01-10 15:20:05,099 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-01-10 15:20:05,099 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2022-01-10 15:20:05,099 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2022-01-10 15:20:05,099 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2022-01-10 15:20:05,099 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2022-01-10 15:20:05,099 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2022-01-10 15:20:05,100 INFO  L138        SettingsManager]:  * Large block encoding in concurrent analysis=OFF
[2022-01-10 15:20:05,100 INFO  L138        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2022-01-10 15:20:05,100 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2022-01-10 15:20:05,100 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2022-01-10 15:20:05,100 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2022-01-10 15:20:05,101 INFO  L136        SettingsManager]: Preferences of IcfgTransformer differ from their defaults:
[2022-01-10 15:20:05,101 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN;
[2022-01-10 15:20:05,246 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2022-01-10 15:20:05,263 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2022-01-10 15:20:05,265 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2022-01-10 15:20:05,265 INFO  L271        PluginConnector]: Initializing CDTParser...
[2022-01-10 15:20:05,266 INFO  L275        PluginConnector]: CDTParser initialized
[2022-01-10 15:20:05,266 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_reverse_ground.i
[2022-01-10 15:20:05,320 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/99e4f0ebe/2e9a5f124b2a40e3b77363c8f8fd2d9d/FLAGb479de26d
[2022-01-10 15:20:05,607 INFO  L306              CDTParser]: Found 1 translation units.
[2022-01-10 15:20:05,607 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_reverse_ground.i
[2022-01-10 15:20:05,611 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/99e4f0ebe/2e9a5f124b2a40e3b77363c8f8fd2d9d/FLAGb479de26d
[2022-01-10 15:20:06,041 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/99e4f0ebe/2e9a5f124b2a40e3b77363c8f8fd2d9d
[2022-01-10 15:20:06,043 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2022-01-10 15:20:06,044 INFO  L131        ToolchainWalker]: Walking toolchain with 6 elements.
[2022-01-10 15:20:06,048 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2022-01-10 15:20:06,048 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2022-01-10 15:20:06,050 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2022-01-10 15:20:06,051 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 03:20:06" (1/1) ...
[2022-01-10 15:20:06,051 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65fdc16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:20:06, skipping insertion in model container
[2022-01-10 15:20:06,052 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 03:20:06" (1/1) ...
[2022-01-10 15:20:06,057 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2022-01-10 15:20:06,070 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2022-01-10 15:20:06,206 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-examples/standard_reverse_ground.i[816,829]
[2022-01-10 15:20:06,224 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-01-10 15:20:06,239 INFO  L203         MainTranslator]: Completed pre-run
[2022-01-10 15:20:06,252 WARN  L230   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_reverse_ground.i[816,829]
[2022-01-10 15:20:06,256 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-01-10 15:20:06,270 INFO  L208         MainTranslator]: Completed translation
[2022-01-10 15:20:06,271 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:20:06 WrapperNode
[2022-01-10 15:20:06,271 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2022-01-10 15:20:06,272 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2022-01-10 15:20:06,272 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2022-01-10 15:20:06,272 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2022-01-10 15:20:06,276 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:20:06" (1/1) ...
[2022-01-10 15:20:06,284 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:20:06" (1/1) ...
[2022-01-10 15:20:06,302 INFO  L137                Inliner]: procedures = 18, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 62
[2022-01-10 15:20:06,302 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2022-01-10 15:20:06,303 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2022-01-10 15:20:06,303 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2022-01-10 15:20:06,303 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2022-01-10 15:20:06,308 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:20:06" (1/1) ...
[2022-01-10 15:20:06,308 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:20:06" (1/1) ...
[2022-01-10 15:20:06,320 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:20:06" (1/1) ...
[2022-01-10 15:20:06,320 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:20:06" (1/1) ...
[2022-01-10 15:20:06,329 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:20:06" (1/1) ...
[2022-01-10 15:20:06,331 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:20:06" (1/1) ...
[2022-01-10 15:20:06,332 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:20:06" (1/1) ...
[2022-01-10 15:20:06,333 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2022-01-10 15:20:06,334 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2022-01-10 15:20:06,334 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2022-01-10 15:20:06,334 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2022-01-10 15:20:06,338 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:20:06" (1/1) ...
[2022-01-10 15:20:06,343 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-01-10 15:20:06,351 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-10 15:20:06,373 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 15:20:06,383 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 15:20:06,401 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2022-01-10 15:20:06,401 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1
[2022-01-10 15:20:06,401 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2022-01-10 15:20:06,401 INFO  L130     BoogieDeclarations]: Found specification of procedure read~intINTTYPE4
[2022-01-10 15:20:06,401 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2022-01-10 15:20:06,401 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2022-01-10 15:20:06,402 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2022-01-10 15:20:06,402 INFO  L130     BoogieDeclarations]: Found specification of procedure write~intINTTYPE4
[2022-01-10 15:20:06,443 INFO  L234             CfgBuilder]: Building ICFG
[2022-01-10 15:20:06,444 INFO  L260             CfgBuilder]: Building CFG for each procedure with an implementation
[2022-01-10 15:20:06,576 INFO  L275             CfgBuilder]: Performing block encoding
[2022-01-10 15:20:06,593 INFO  L294             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2022-01-10 15:20:06,593 INFO  L299             CfgBuilder]: Removed 3 assume(true) statements.
[2022-01-10 15:20:06,594 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 03:20:06 BoogieIcfgContainer
[2022-01-10 15:20:06,594 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2022-01-10 15:20:06,595 INFO  L113        PluginConnector]: ------------------------IcfgTransformer----------------------------
[2022-01-10 15:20:06,595 INFO  L271        PluginConnector]: Initializing IcfgTransformer...
[2022-01-10 15:20:06,610 INFO  L275        PluginConnector]: IcfgTransformer initialized
[2022-01-10 15:20:06,612 INFO  L185        PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 03:20:06" (1/1) ...
[2022-01-10 15:20:06,712 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 03:20:06 BasicIcfg
[2022-01-10 15:20:06,712 INFO  L132        PluginConnector]: ------------------------ END IcfgTransformer----------------------------
[2022-01-10 15:20:06,713 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2022-01-10 15:20:06,713 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2022-01-10 15:20:06,715 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2022-01-10 15:20:06,715 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 03:20:06" (1/4) ...
[2022-01-10 15:20:06,716 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37f8f887 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 03:20:06, skipping insertion in model container
[2022-01-10 15:20:06,716 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:20:06" (2/4) ...
[2022-01-10 15:20:06,716 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37f8f887 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 03:20:06, skipping insertion in model container
[2022-01-10 15:20:06,716 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 03:20:06" (3/4) ...
[2022-01-10 15:20:06,716 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37f8f887 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 03:20:06, skipping insertion in model container
[2022-01-10 15:20:06,717 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 03:20:06" (4/4) ...
[2022-01-10 15:20:06,717 INFO  L111   eAbstractionObserver]: Analyzing ICFG standard_reverse_ground.iTransformedIcfg
[2022-01-10 15:20:06,727 INFO  L204   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2022-01-10 15:20:06,728 INFO  L163   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2022-01-10 15:20:06,762 INFO  L338      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2022-01-10 15:20:06,768 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 15:20:06,769 INFO  L340      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2022-01-10 15:20:06,779 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 18 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 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 15:20:06,782 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10
[2022-01-10 15:20:06,783 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 15:20:06,783 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 15:20:06,784 INFO  L402      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 15:20:06,791 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 15:20:06,792 INFO  L85        PathProgramCache]: Analyzing trace with hash 1373313443, now seen corresponding path program 1 times
[2022-01-10 15:20:06,797 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 15:20:06,798 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202143953]
[2022-01-10 15:20:06,798 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 15:20:06,799 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 15:20:06,901 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 15:20:06,960 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 15:20:06,961 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 15:20:06,961 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202143953]
[2022-01-10 15:20:06,961 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202143953] provided 1 perfect and 0 imperfect interpolant sequences
[2022-01-10 15:20:06,962 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-01-10 15:20:06,962 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2022-01-10 15:20:06,963 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031288053]
[2022-01-10 15:20:06,965 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-10 15:20:06,968 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 2 states
[2022-01-10 15:20:06,968 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-10 15:20:06,992 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2022-01-10 15:20:06,993 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2022-01-10 15:20:06,994 INFO  L87              Difference]: Start difference. First operand  has 18 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 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 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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 15:20:07,006 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 15:20:07,006 INFO  L93              Difference]: Finished difference Result 32 states and 42 transitions.
[2022-01-10 15:20:07,007 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. 
[2022-01-10 15:20:07,008 INFO  L78                 Accepts]: Start accepts. Automaton has  has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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 9
[2022-01-10 15:20:07,008 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 15:20:07,016 INFO  L225             Difference]: With dead ends: 32
[2022-01-10 15:20:07,016 INFO  L226             Difference]: Without dead ends: 14
[2022-01-10 15:20:07,018 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 15:20:07,023 INFO  L933         BasicCegarLoop]: 20 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, 20 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 15:20:07,024 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-01-10 15:20:07,034 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 14 states.
[2022-01-10 15:20:07,042 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14.
[2022-01-10 15:20:07,043 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 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 15:20:07,043 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions.
[2022-01-10 15:20:07,044 INFO  L78                 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 9
[2022-01-10 15:20:07,044 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 15:20:07,044 INFO  L470      AbstractCegarLoop]: Abstraction has 14 states and 16 transitions.
[2022-01-10 15:20:07,044 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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 15:20:07,045 INFO  L276                IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions.
[2022-01-10 15:20:07,045 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10
[2022-01-10 15:20:07,045 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 15:20:07,045 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 15:20:07,045 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2022-01-10 15:20:07,045 INFO  L402      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 15:20:07,051 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 15:20:07,051 INFO  L85        PathProgramCache]: Analyzing trace with hash -2033226651, now seen corresponding path program 1 times
[2022-01-10 15:20:07,051 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 15:20:07,052 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139335320]
[2022-01-10 15:20:07,052 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 15:20:07,052 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 15:20:07,096 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 15:20:07,188 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 15:20:07,189 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 15:20:07,189 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139335320]
[2022-01-10 15:20:07,189 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139335320] provided 1 perfect and 0 imperfect interpolant sequences
[2022-01-10 15:20:07,189 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-01-10 15:20:07,189 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2022-01-10 15:20:07,189 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404277556]
[2022-01-10 15:20:07,189 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-10 15:20:07,190 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-01-10 15:20:07,190 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-10 15:20:07,191 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-01-10 15:20:07,191 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-01-10 15:20:07,191 INFO  L87              Difference]: Start difference. First operand 14 states and 16 transitions. Second operand  has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 15:20:07,238 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 15:20:07,238 INFO  L93              Difference]: Finished difference Result 28 states and 33 transitions.
[2022-01-10 15:20:07,239 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-01-10 15:20:07,239 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 9
[2022-01-10 15:20:07,239 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 15:20:07,239 INFO  L225             Difference]: With dead ends: 28
[2022-01-10 15:20:07,239 INFO  L226             Difference]: Without dead ends: 18
[2022-01-10 15:20:07,240 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 15:20:07,240 INFO  L933         BasicCegarLoop]: 12 mSDtfsCounter, 2 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-01-10 15:20:07,241 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 20 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-01-10 15:20:07,241 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 18 states.
[2022-01-10 15:20:07,243 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16.
[2022-01-10 15:20:07,244 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 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 15:20:07,244 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions.
[2022-01-10 15:20:07,244 INFO  L78                 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 9
[2022-01-10 15:20:07,244 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 15:20:07,244 INFO  L470      AbstractCegarLoop]: Abstraction has 16 states and 18 transitions.
[2022-01-10 15:20:07,244 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 15:20:07,245 INFO  L276                IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions.
[2022-01-10 15:20:07,245 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 14
[2022-01-10 15:20:07,245 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 15:20:07,245 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 15:20:07,245 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2022-01-10 15:20:07,245 INFO  L402      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 15:20:07,246 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 15:20:07,246 INFO  L85        PathProgramCache]: Analyzing trace with hash 163079489, now seen corresponding path program 1 times
[2022-01-10 15:20:07,246 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 15:20:07,246 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769187302]
[2022-01-10 15:20:07,246 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 15:20:07,246 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 15:20:07,292 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 15:20:07,331 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-01-10 15:20:07,331 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 15:20:07,332 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769187302]
[2022-01-10 15:20:07,332 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769187302] provided 0 perfect and 1 imperfect interpolant sequences
[2022-01-10 15:20:07,332 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886648337]
[2022-01-10 15:20:07,332 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 15:20:07,332 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-10 15:20:07,332 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-10 15:20:07,334 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 15:20:07,335 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 15:20:07,466 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 15:20:07,469 INFO  L263         TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 7 conjunts are in the unsatisfiable core
[2022-01-10 15:20:07,472 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 15:20:07,578 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-01-10 15:20:07,578 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-01-10 15:20:07,617 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-01-10 15:20:07,618 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [886648337] provided 0 perfect and 2 imperfect interpolant sequences
[2022-01-10 15:20:07,618 INFO  L186   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-01-10 15:20:07,618 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7
[2022-01-10 15:20:07,618 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387289622]
[2022-01-10 15:20:07,618 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-01-10 15:20:07,618 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2022-01-10 15:20:07,619 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-10 15:20:07,619 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2022-01-10 15:20:07,619 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42
[2022-01-10 15:20:07,619 INFO  L87              Difference]: Start difference. First operand 16 states and 18 transitions. Second operand  has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 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 15:20:07,732 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 15:20:07,732 INFO  L93              Difference]: Finished difference Result 39 states and 48 transitions.
[2022-01-10 15:20:07,733 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2022-01-10 15:20:07,733 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 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 13
[2022-01-10 15:20:07,733 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 15:20:07,733 INFO  L225             Difference]: With dead ends: 39
[2022-01-10 15:20:07,733 INFO  L226             Difference]: Without dead ends: 28
[2022-01-10 15:20:07,734 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56
[2022-01-10 15:20:07,734 INFO  L933         BasicCegarLoop]: 12 mSDtfsCounter, 9 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-01-10 15:20:07,735 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 52 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-01-10 15:20:07,735 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 28 states.
[2022-01-10 15:20:07,739 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28.
[2022-01-10 15:20:07,739 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 28 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 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 15:20:07,739 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions.
[2022-01-10 15:20:07,740 INFO  L78                 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 13
[2022-01-10 15:20:07,740 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 15:20:07,740 INFO  L470      AbstractCegarLoop]: Abstraction has 28 states and 30 transitions.
[2022-01-10 15:20:07,740 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 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 15:20:07,740 INFO  L276                IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions.
[2022-01-10 15:20:07,740 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 26
[2022-01-10 15:20:07,741 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 15:20:07,741 INFO  L514         BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 15:20:07,745 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 15:20:07,944 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-10 15:20:07,945 INFO  L402      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 15:20:07,946 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 15:20:07,946 INFO  L85        PathProgramCache]: Analyzing trace with hash -428045355, now seen corresponding path program 2 times
[2022-01-10 15:20:07,946 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 15:20:07,946 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989030252]
[2022-01-10 15:20:07,946 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 15:20:07,947 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 15:20:08,074 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 15:20:08,178 INFO  L134       CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked.
[2022-01-10 15:20:08,178 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 15:20:08,178 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989030252]
[2022-01-10 15:20:08,179 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989030252] provided 0 perfect and 1 imperfect interpolant sequences
[2022-01-10 15:20:08,180 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738947463]
[2022-01-10 15:20:08,180 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2022-01-10 15:20:08,181 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-10 15:20:08,181 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-10 15:20:08,182 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 15:20:08,183 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 15:20:08,579 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2022-01-10 15:20:08,580 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-01-10 15:20:08,582 INFO  L263         TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 28 conjunts are in the unsatisfiable core
[2022-01-10 15:20:08,583 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 15:20:22,316 INFO  L134       CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 15:20:22,316 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-01-10 15:20:24,607 INFO  L134       CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked.
[2022-01-10 15:20:24,608 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [738947463] provided 0 perfect and 2 imperfect interpolant sequences
[2022-01-10 15:20:24,608 INFO  L186   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-01-10 15:20:24,608 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16
[2022-01-10 15:20:24,608 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619164317]
[2022-01-10 15:20:24,608 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-01-10 15:20:24,608 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 16 states
[2022-01-10 15:20:24,608 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-10 15:20:24,609 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants.
[2022-01-10 15:20:24,609 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=156, Unknown=6, NotChecked=0, Total=240
[2022-01-10 15:20:24,609 INFO  L87              Difference]: Start difference. First operand 28 states and 30 transitions. Second operand  has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 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 15:20:32,901 WARN  L228               SmtUtils]: Spent 5.62s on a formula simplification that was a NOOP. DAG size: 42 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)
[2022-01-10 15:21:01,427 WARN  L228               SmtUtils]: Spent 6.49s on a formula simplification that was a NOOP. DAG size: 37 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)
[2022-01-10 15:21:01,789 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 15:21:01,789 INFO  L93              Difference]: Finished difference Result 67 states and 81 transitions.
[2022-01-10 15:21:01,789 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. 
[2022-01-10 15:21:01,789 INFO  L78                 Accepts]: Start accepts. Automaton has  has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 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) Word has length 25
[2022-01-10 15:21:01,790 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 15:21:01,790 INFO  L225             Difference]: With dead ends: 67
[2022-01-10 15:21:01,790 INFO  L226             Difference]: Without dead ends: 50
[2022-01-10 15:21:01,791 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 50.1s TimeCoverageRelationStatistics Valid=165, Invalid=284, Unknown=13, NotChecked=0, Total=462
[2022-01-10 15:21:01,792 INFO  L933         BasicCegarLoop]: 12 mSDtfsCounter, 33 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time
[2022-01-10 15:21:01,792 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 76 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 80 Invalid, 0 Unknown, 28 Unchecked, 2.0s Time]
[2022-01-10 15:21:01,792 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 50 states.
[2022-01-10 15:21:01,798 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50.
[2022-01-10 15:21:01,798 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 50 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 49 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 15:21:01,799 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions.
[2022-01-10 15:21:01,799 INFO  L78                 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 25
[2022-01-10 15:21:01,799 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 15:21:01,799 INFO  L470      AbstractCegarLoop]: Abstraction has 50 states and 52 transitions.
[2022-01-10 15:21:01,799 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 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 15:21:01,799 INFO  L276                IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions.
[2022-01-10 15:21:01,800 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 48
[2022-01-10 15:21:01,800 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 15:21:01,800 INFO  L514         BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 15:21:01,806 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0
[2022-01-10 15:21:02,004 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,SelfDestructingSolverStorable3
[2022-01-10 15:21:02,005 INFO  L402      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 15:21:02,005 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 15:21:02,005 INFO  L85        PathProgramCache]: Analyzing trace with hash -984477793, now seen corresponding path program 3 times
[2022-01-10 15:21:02,005 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 15:21:02,005 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787175209]
[2022-01-10 15:21:02,005 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 15:21:02,006 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 15:21:02,169 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 15:21:02,484 INFO  L134       CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked.
[2022-01-10 15:21:02,485 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 15:21:02,485 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787175209]
[2022-01-10 15:21:02,485 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787175209] provided 0 perfect and 1 imperfect interpolant sequences
[2022-01-10 15:21:02,485 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636974767]
[2022-01-10 15:21:02,485 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2022-01-10 15:21:02,485 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-10 15:21:02,485 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-10 15:21:02,496 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 15:21:02,497 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 15:21:02,847 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s)
[2022-01-10 15:21:02,847 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-01-10 15:21:02,849 INFO  L263         TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 32 conjunts are in the unsatisfiable core
[2022-01-10 15:21:02,852 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 15:21:02,874 INFO  L387             Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 10
[2022-01-10 15:21:03,253 INFO  L387             Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63
[2022-01-10 15:21:07,693 INFO  L173   IndexEqualityManager]: detected equality via solver
[2022-01-10 15:21:07,704 INFO  L173   IndexEqualityManager]: detected equality via solver
[2022-01-10 15:21:07,705 INFO  L387             Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 20
[2022-01-10 15:21:07,756 INFO  L134       CoverageAnalysis]: Checked inductivity of 181 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked.
[2022-01-10 15:21:07,756 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2022-01-10 15:21:07,757 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636974767] provided 1 perfect and 0 imperfect interpolant sequences
[2022-01-10 15:21:07,757 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2022-01-10 15:21:07,757 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 18
[2022-01-10 15:21:07,757 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479126222]
[2022-01-10 15:21:07,757 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-10 15:21:07,757 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2022-01-10 15:21:07,757 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-10 15:21:07,758 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2022-01-10 15:21:07,758 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306
[2022-01-10 15:21:07,758 INFO  L87              Difference]: Start difference. First operand 50 states and 52 transitions. Second operand  has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 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 15:21:07,896 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 15:21:07,896 INFO  L93              Difference]: Finished difference Result 54 states and 56 transitions.
[2022-01-10 15:21:07,896 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2022-01-10 15:21:07,897 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 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 47
[2022-01-10 15:21:07,897 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 15:21:07,897 INFO  L225             Difference]: With dead ends: 54
[2022-01-10 15:21:07,897 INFO  L226             Difference]: Without dead ends: 52
[2022-01-10 15:21:07,898 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306
[2022-01-10 15:21:07,898 INFO  L933         BasicCegarLoop]: 11 mSDtfsCounter, 5 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-01-10 15:21:07,898 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 36 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 17 Unchecked, 0.1s Time]
[2022-01-10 15:21:07,899 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 52 states.
[2022-01-10 15:21:07,906 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52.
[2022-01-10 15:21:07,906 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 52 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 51 states have internal predecessors, (54), 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 15:21:07,909 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions.
[2022-01-10 15:21:07,909 INFO  L78                 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 47
[2022-01-10 15:21:07,909 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 15:21:07,909 INFO  L470      AbstractCegarLoop]: Abstraction has 52 states and 54 transitions.
[2022-01-10 15:21:07,909 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 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 15:21:07,909 INFO  L276                IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions.
[2022-01-10 15:21:07,910 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 52
[2022-01-10 15:21:07,910 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 15:21:07,910 INFO  L514         BasicCegarLoop]: trace histogram [10, 10, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 15:21:07,915 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0
[2022-01-10 15:21:08,110 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-10 15:21:08,112 INFO  L402      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 15:21:08,112 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 15:21:08,112 INFO  L85        PathProgramCache]: Analyzing trace with hash -1435887270, now seen corresponding path program 1 times
[2022-01-10 15:21:08,113 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 15:21:08,113 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579606675]
[2022-01-10 15:21:08,113 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 15:21:08,113 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 15:21:08,252 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 15:21:08,446 INFO  L134       CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked.
[2022-01-10 15:21:08,447 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 15:21:08,447 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579606675]
[2022-01-10 15:21:08,447 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579606675] provided 0 perfect and 1 imperfect interpolant sequences
[2022-01-10 15:21:08,447 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789815233]
[2022-01-10 15:21:08,447 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 15:21:08,447 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-10 15:21:08,447 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-10 15:21:08,449 INFO  L229       MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-01-10 15:21:08,451 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2022-01-10 15:21:08,583 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 15:21:08,585 INFO  L263         TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 42 conjunts are in the unsatisfiable core
[2022-01-10 15:21:08,589 INFO  L286         TraceCheckSpWp]: Computing forward predicates...