/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_NONE.epf -i ../../../trunk/examples/svcomp/loop-acceleration/functions_1-1.c


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


This is Ultimate 0.2.2-dev-a10ec3b
[2022-01-10 20:12:56,176 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2022-01-10 20:12:56,177 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2022-01-10 20:12:56,229 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2022-01-10 20:12:56,229 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2022-01-10 20:12:56,230 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2022-01-10 20:12:56,231 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2022-01-10 20:12:56,232 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2022-01-10 20:12:56,233 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2022-01-10 20:12:56,234 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
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[2022-01-10 20:12:56,235 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2022-01-10 20:12:56,235 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2022-01-10 20:12:56,236 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2022-01-10 20:12:56,237 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2022-01-10 20:12:56,238 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2022-01-10 20:12:56,238 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2022-01-10 20:12:56,239 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2022-01-10 20:12:56,248 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2022-01-10 20:12:56,250 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2022-01-10 20:12:56,250 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2022-01-10 20:12:56,251 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2022-01-10 20:12:56,252 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2022-01-10 20:12:56,252 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2022-01-10 20:12:56,254 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2022-01-10 20:12:56,254 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2022-01-10 20:12:56,254 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2022-01-10 20:12:56,255 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2022-01-10 20:12:56,255 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2022-01-10 20:12:56,255 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2022-01-10 20:12:56,256 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2022-01-10 20:12:56,256 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2022-01-10 20:12:56,257 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2022-01-10 20:12:56,257 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2022-01-10 20:12:56,258 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2022-01-10 20:12:56,258 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2022-01-10 20:12:56,258 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2022-01-10 20:12:56,258 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2022-01-10 20:12:56,258 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2022-01-10 20:12:56,259 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2022-01-10 20:12:56,264 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_NONE.epf
[2022-01-10 20:12:56,278 INFO  L113        SettingsManager]: Loading preferences was successful
[2022-01-10 20:12:56,278 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2022-01-10 20:12:56,278 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2022-01-10 20:12:56,278 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2022-01-10 20:12:56,279 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2022-01-10 20:12:56,279 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2022-01-10 20:12:56,279 INFO  L138        SettingsManager]:  * Use SBE=true
[2022-01-10 20:12:56,279 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2022-01-10 20:12:56,279 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2022-01-10 20:12:56,279 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2022-01-10 20:12:56,280 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2022-01-10 20:12:56,280 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2022-01-10 20:12:56,280 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2022-01-10 20:12:56,280 INFO  L138        SettingsManager]:  * Adapt memory model on pointer casts if necessary=true
[2022-01-10 20:12:56,280 INFO  L138        SettingsManager]:  * Use bitvectors instead of ints=true
[2022-01-10 20:12:56,280 INFO  L138        SettingsManager]:  * Memory model=HoenickeLindenmann_4ByteResolution
[2022-01-10 20:12:56,280 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2022-01-10 20:12:56,280 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2022-01-10 20:12:56,281 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2022-01-10 20:12:56,281 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2022-01-10 20:12:56,281 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2022-01-10 20:12:56,281 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-01-10 20:12:56,281 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2022-01-10 20:12:56,281 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2022-01-10 20:12:56,281 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2022-01-10 20:12:56,281 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2022-01-10 20:12:56,281 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2022-01-10 20:12:56,282 INFO  L138        SettingsManager]:  * Large block encoding in concurrent analysis=OFF
[2022-01-10 20:12:56,282 INFO  L138        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2022-01-10 20:12:56,282 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2022-01-10 20:12:56,282 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2022-01-10 20:12:56,282 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2022-01-10 20:12:56,283 INFO  L136        SettingsManager]: Preferences of IcfgTransformer differ from their defaults:
[2022-01-10 20:12:56,283 INFO  L138        SettingsManager]:  * TransformationType=BV_TO_INT_NONE
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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN;
[2022-01-10 20:12:56,484 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2022-01-10 20:12:56,502 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2022-01-10 20:12:56,504 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2022-01-10 20:12:56,505 INFO  L271        PluginConnector]: Initializing CDTParser...
[2022-01-10 20:12:56,505 INFO  L275        PluginConnector]: CDTParser initialized
[2022-01-10 20:12:56,506 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/functions_1-1.c
[2022-01-10 20:12:56,563 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f6fb1dde/a9ff9b9e3b9c4aec938126499d416d81/FLAG41694e4b3
[2022-01-10 20:12:56,910 INFO  L306              CDTParser]: Found 1 translation units.
[2022-01-10 20:12:56,911 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/functions_1-1.c
[2022-01-10 20:12:56,917 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f6fb1dde/a9ff9b9e3b9c4aec938126499d416d81/FLAG41694e4b3
[2022-01-10 20:12:56,930 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f6fb1dde/a9ff9b9e3b9c4aec938126499d416d81
[2022-01-10 20:12:56,932 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2022-01-10 20:12:56,934 INFO  L131        ToolchainWalker]: Walking toolchain with 6 elements.
[2022-01-10 20:12:56,936 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2022-01-10 20:12:56,936 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2022-01-10 20:12:56,938 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2022-01-10 20:12:56,938 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 08:12:56" (1/1) ...
[2022-01-10 20:12:56,939 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57f48e69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:12:56, skipping insertion in model container
[2022-01-10 20:12:56,939 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 08:12:56" (1/1) ...
[2022-01-10 20:12:56,943 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2022-01-10 20:12:56,954 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2022-01-10 20:12:57,102 WARN  L230   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/functions_1-1.c[325,338]
[2022-01-10 20:12:57,110 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-01-10 20:12:57,118 INFO  L203         MainTranslator]: Completed pre-run
[2022-01-10 20:12:57,127 WARN  L230   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/functions_1-1.c[325,338]
[2022-01-10 20:12:57,130 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-01-10 20:12:57,140 INFO  L208         MainTranslator]: Completed translation
[2022-01-10 20:12:57,140 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:12:57 WrapperNode
[2022-01-10 20:12:57,140 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2022-01-10 20:12:57,141 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2022-01-10 20:12:57,141 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2022-01-10 20:12:57,141 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2022-01-10 20:12:57,146 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:12:57" (1/1) ...
[2022-01-10 20:12:57,152 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:12:57" (1/1) ...
[2022-01-10 20:12:57,163 INFO  L137                Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 28
[2022-01-10 20:12:57,164 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2022-01-10 20:12:57,164 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2022-01-10 20:12:57,165 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2022-01-10 20:12:57,167 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2022-01-10 20:12:57,172 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:12:57" (1/1) ...
[2022-01-10 20:12:57,172 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:12:57" (1/1) ...
[2022-01-10 20:12:57,175 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:12:57" (1/1) ...
[2022-01-10 20:12:57,175 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:12:57" (1/1) ...
[2022-01-10 20:12:57,179 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:12:57" (1/1) ...
[2022-01-10 20:12:57,182 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:12:57" (1/1) ...
[2022-01-10 20:12:57,187 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:12:57" (1/1) ...
[2022-01-10 20:12:57,189 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2022-01-10 20:12:57,190 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2022-01-10 20:12:57,190 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2022-01-10 20:12:57,190 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2022-01-10 20:12:57,191 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:12:57" (1/1) ...
[2022-01-10 20:12:57,196 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-01-10 20:12:57,203 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-10 20:12:57,236 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 20:12:57,248 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 20:12:57,262 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2022-01-10 20:12:57,263 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2022-01-10 20:12:57,263 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2022-01-10 20:12:57,263 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1
[2022-01-10 20:12:57,301 INFO  L234             CfgBuilder]: Building ICFG
[2022-01-10 20:12:57,302 INFO  L260             CfgBuilder]: Building CFG for each procedure with an implementation
[2022-01-10 20:12:57,371 INFO  L275             CfgBuilder]: Performing block encoding
[2022-01-10 20:12:57,374 INFO  L294             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2022-01-10 20:12:57,374 INFO  L299             CfgBuilder]: Removed 1 assume(true) statements.
[2022-01-10 20:12:57,375 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 08:12:57 BoogieIcfgContainer
[2022-01-10 20:12:57,375 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2022-01-10 20:12:57,376 INFO  L113        PluginConnector]: ------------------------IcfgTransformer----------------------------
[2022-01-10 20:12:57,376 INFO  L271        PluginConnector]: Initializing IcfgTransformer...
[2022-01-10 20:12:57,376 INFO  L275        PluginConnector]: IcfgTransformer initialized
[2022-01-10 20:12:57,378 INFO  L185        PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 08:12:57" (1/1) ...
[2022-01-10 20:12:57,406 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 08:12:57 BasicIcfg
[2022-01-10 20:12:57,406 INFO  L132        PluginConnector]: ------------------------ END IcfgTransformer----------------------------
[2022-01-10 20:12:57,407 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2022-01-10 20:12:57,407 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2022-01-10 20:12:57,409 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2022-01-10 20:12:57,409 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 08:12:56" (1/4) ...
[2022-01-10 20:12:57,410 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73d2167d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 08:12:57, skipping insertion in model container
[2022-01-10 20:12:57,410 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:12:57" (2/4) ...
[2022-01-10 20:12:57,410 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73d2167d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 08:12:57, skipping insertion in model container
[2022-01-10 20:12:57,410 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 08:12:57" (3/4) ...
[2022-01-10 20:12:57,410 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73d2167d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 08:12:57, skipping insertion in model container
[2022-01-10 20:12:57,411 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 08:12:57" (4/4) ...
[2022-01-10 20:12:57,411 INFO  L111   eAbstractionObserver]: Analyzing ICFG functions_1-1.cTransformedIcfg
[2022-01-10 20:12:57,415 INFO  L204   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2022-01-10 20:12:57,415 INFO  L163   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2022-01-10 20:12:57,445 INFO  L338      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2022-01-10 20:12:57,451 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 20:12:57,451 INFO  L340      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2022-01-10 20:12:57,467 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 12 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 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 20:12:57,470 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 7
[2022-01-10 20:12:57,470 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 20:12:57,471 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1]
[2022-01-10 20:12:57,471 INFO  L402      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 20:12:57,474 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 20:12:57,474 INFO  L85        PathProgramCache]: Analyzing trace with hash 1835162407, now seen corresponding path program 1 times
[2022-01-10 20:12:57,479 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 20:12:57,480 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970962515]
[2022-01-10 20:12:57,480 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 20:12:57,480 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 20:12:57,550 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 20:12:57,579 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 20:12:57,580 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 20:12:57,580 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970962515]
[2022-01-10 20:12:57,580 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970962515] provided 1 perfect and 0 imperfect interpolant sequences
[2022-01-10 20:12:57,581 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-01-10 20:12:57,581 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2022-01-10 20:12:57,582 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480606773]
[2022-01-10 20:12:57,582 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-10 20:12:57,584 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 2 states
[2022-01-10 20:12:57,585 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-10 20:12:57,610 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2022-01-10 20:12:57,611 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2022-01-10 20:12:57,612 INFO  L87              Difference]: Start difference. First operand  has 12 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 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 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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 20:12:57,620 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 20:12:57,620 INFO  L93              Difference]: Finished difference Result 20 states and 22 transitions.
[2022-01-10 20:12:57,621 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. 
[2022-01-10 20:12:57,621 INFO  L78                 Accepts]: Start accepts. Automaton has  has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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 6
[2022-01-10 20:12:57,622 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 20:12:57,626 INFO  L225             Difference]: With dead ends: 20
[2022-01-10 20:12:57,626 INFO  L226             Difference]: Without dead ends: 8
[2022-01-10 20:12:57,627 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 20:12:57,630 INFO  L933         BasicCegarLoop]: 12 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, 12 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 20:12:57,631 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-01-10 20:12:57,640 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 8 states.
[2022-01-10 20:12:57,647 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8.
[2022-01-10 20:12:57,648 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 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 20:12:57,648 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions.
[2022-01-10 20:12:57,649 INFO  L78                 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6
[2022-01-10 20:12:57,649 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 20:12:57,649 INFO  L470      AbstractCegarLoop]: Abstraction has 8 states and 8 transitions.
[2022-01-10 20:12:57,649 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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 20:12:57,649 INFO  L276                IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions.
[2022-01-10 20:12:57,649 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 7
[2022-01-10 20:12:57,649 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 20:12:57,649 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1]
[2022-01-10 20:12:57,650 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2022-01-10 20:12:57,650 INFO  L402      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 20:12:57,650 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 20:12:57,650 INFO  L85        PathProgramCache]: Analyzing trace with hash 1835192198, now seen corresponding path program 1 times
[2022-01-10 20:12:57,651 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 20:12:57,651 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030525030]
[2022-01-10 20:12:57,651 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 20:12:57,651 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 20:12:57,661 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 20:12:57,704 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 20:12:57,704 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 20:12:57,704 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030525030]
[2022-01-10 20:12:57,704 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030525030] provided 1 perfect and 0 imperfect interpolant sequences
[2022-01-10 20:12:57,704 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-01-10 20:12:57,705 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2022-01-10 20:12:57,705 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132569029]
[2022-01-10 20:12:57,705 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-10 20:12:57,705 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-01-10 20:12:57,706 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-10 20:12:57,706 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-01-10 20:12:57,706 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-01-10 20:12:57,706 INFO  L87              Difference]: Start difference. First operand 8 states and 8 transitions. Second operand  has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 20:12:57,715 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 20:12:57,716 INFO  L93              Difference]: Finished difference Result 14 states and 14 transitions.
[2022-01-10 20:12:57,716 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-01-10 20:12:57,716 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 6
[2022-01-10 20:12:57,716 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 20:12:57,716 INFO  L225             Difference]: With dead ends: 14
[2022-01-10 20:12:57,716 INFO  L226             Difference]: Without dead ends: 10
[2022-01-10 20:12:57,717 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-01-10 20:12:57,718 INFO  L933         BasicCegarLoop]: 7 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-01-10 20:12:57,718 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 10 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-01-10 20:12:57,719 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10 states.
[2022-01-10 20:12:57,720 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9.
[2022-01-10 20:12:57,720 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 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 20:12:57,720 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions.
[2022-01-10 20:12:57,720 INFO  L78                 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6
[2022-01-10 20:12:57,720 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 20:12:57,721 INFO  L470      AbstractCegarLoop]: Abstraction has 9 states and 9 transitions.
[2022-01-10 20:12:57,721 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 20:12:57,721 INFO  L276                IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions.
[2022-01-10 20:12:57,721 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 9
[2022-01-10 20:12:57,721 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 20:12:57,721 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 20:12:57,721 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2022-01-10 20:12:57,721 INFO  L402      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 20:12:57,722 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 20:12:57,722 INFO  L85        PathProgramCache]: Analyzing trace with hash -1582425464, now seen corresponding path program 1 times
[2022-01-10 20:12:57,722 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 20:12:57,722 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698428637]
[2022-01-10 20:12:57,722 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 20:12:57,722 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 20:12:57,752 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 20:12:57,792 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 20:12:57,792 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 20:12:57,792 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698428637]
[2022-01-10 20:12:57,792 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698428637] provided 0 perfect and 1 imperfect interpolant sequences
[2022-01-10 20:12:57,793 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005700394]
[2022-01-10 20:12:57,793 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 20:12:57,793 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-10 20:12:57,793 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-10 20:12:57,794 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 20:12:57,795 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 20:12:57,832 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 20:12:57,834 INFO  L263         TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core
[2022-01-10 20:12:57,837 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 20:12:57,878 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 20:12:57,878 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-01-10 20:12:57,940 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 20:12:57,941 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005700394] provided 0 perfect and 2 imperfect interpolant sequences
[2022-01-10 20:12:57,941 INFO  L186   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-01-10 20:12:57,941 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10
[2022-01-10 20:12:57,941 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063570504]
[2022-01-10 20:12:57,941 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-01-10 20:12:57,941 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 10 states
[2022-01-10 20:12:57,942 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-10 20:12:57,942 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2022-01-10 20:12:57,942 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90
[2022-01-10 20:12:57,942 INFO  L87              Difference]: Start difference. First operand 9 states and 9 transitions. Second operand  has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 20:12:58,015 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 20:12:58,015 INFO  L93              Difference]: Finished difference Result 17 states and 18 transitions.
[2022-01-10 20:12:58,016 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2022-01-10 20:12:58,016 INFO  L78                 Accepts]: Start accepts. Automaton has  has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 8
[2022-01-10 20:12:58,017 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 20:12:58,017 INFO  L225             Difference]: With dead ends: 17
[2022-01-10 20:12:58,017 INFO  L226             Difference]: Without dead ends: 13
[2022-01-10 20:12:58,017 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182
[2022-01-10 20:12:58,018 INFO  L933         BasicCegarLoop]: 6 mSDtfsCounter, 4 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-01-10 20:12:58,019 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 18 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-01-10 20:12:58,019 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 13 states.
[2022-01-10 20:12:58,021 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13.
[2022-01-10 20:12:58,021 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 12 states have internal predecessors, (13), 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 20:12:58,021 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions.
[2022-01-10 20:12:58,021 INFO  L78                 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 8
[2022-01-10 20:12:58,021 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 20:12:58,022 INFO  L470      AbstractCegarLoop]: Abstraction has 13 states and 13 transitions.
[2022-01-10 20:12:58,022 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 20:12:58,022 INFO  L276                IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions.
[2022-01-10 20:12:58,022 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 13
[2022-01-10 20:12:58,022 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 20:12:58,022 INFO  L514         BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1]
[2022-01-10 20:12:58,038 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 20:12:58,239 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 20:12:58,239 INFO  L402      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 20:12:58,240 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 20:12:58,240 INFO  L85        PathProgramCache]: Analyzing trace with hash 672966412, now seen corresponding path program 2 times
[2022-01-10 20:12:58,240 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 20:12:58,240 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615999308]
[2022-01-10 20:12:58,240 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 20:12:58,240 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 20:12:58,273 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 20:12:58,358 INFO  L134       CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 20:12:58,359 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 20:12:58,359 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615999308]
[2022-01-10 20:12:58,359 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615999308] provided 0 perfect and 1 imperfect interpolant sequences
[2022-01-10 20:12:58,362 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260386649]
[2022-01-10 20:12:58,363 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2022-01-10 20:12:58,363 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-10 20:12:58,363 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-10 20:12:58,372 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 20:12:58,373 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 20:12:58,421 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2022-01-10 20:12:58,422 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-01-10 20:12:58,422 INFO  L263         TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 28 conjunts are in the unsatisfiable core
[2022-01-10 20:12:58,424 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 20:12:58,532 INFO  L134       CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 20:12:58,533 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-01-10 20:12:58,729 INFO  L134       CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 20:12:58,729 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260386649] provided 0 perfect and 2 imperfect interpolant sequences
[2022-01-10 20:12:58,729 INFO  L186   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-01-10 20:12:58,729 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22
[2022-01-10 20:12:58,730 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601761261]
[2022-01-10 20:12:58,730 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-01-10 20:12:58,730 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 22 states
[2022-01-10 20:12:58,730 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-10 20:12:58,730 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants.
[2022-01-10 20:12:58,731 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462
[2022-01-10 20:12:58,731 INFO  L87              Difference]: Start difference. First operand 13 states and 13 transitions. Second operand  has 22 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 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 20:12:59,017 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 20:12:59,017 INFO  L93              Difference]: Finished difference Result 25 states and 28 transitions.
[2022-01-10 20:12:59,018 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. 
[2022-01-10 20:12:59,018 INFO  L78                 Accepts]: Start accepts. Automaton has  has 22 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 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 12
[2022-01-10 20:12:59,018 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 20:12:59,019 INFO  L225             Difference]: With dead ends: 25
[2022-01-10 20:12:59,019 INFO  L226             Difference]: Without dead ends: 21
[2022-01-10 20:12:59,020 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=266, Invalid=856, Unknown=0, NotChecked=0, Total=1122
[2022-01-10 20:12:59,021 INFO  L933         BasicCegarLoop]: 6 mSDtfsCounter, 2 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-01-10 20:12:59,021 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 48 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-01-10 20:12:59,022 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 21 states.
[2022-01-10 20:12:59,025 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21.
[2022-01-10 20:12:59,026 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 21 states, 20 states have (on average 1.05) internal successors, (21), 20 states have internal predecessors, (21), 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 20:12:59,026 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions.
[2022-01-10 20:12:59,026 INFO  L78                 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 12
[2022-01-10 20:12:59,026 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 20:12:59,027 INFO  L470      AbstractCegarLoop]: Abstraction has 21 states and 21 transitions.
[2022-01-10 20:12:59,027 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 22 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 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 20:12:59,027 INFO  L276                IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions.
[2022-01-10 20:12:59,027 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 21
[2022-01-10 20:12:59,027 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 20:12:59,028 INFO  L514         BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1]
[2022-01-10 20:12:59,053 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0
[2022-01-10 20:12:59,247 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 20:12:59,248 INFO  L402      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 20:12:59,248 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 20:12:59,248 INFO  L85        PathProgramCache]: Analyzing trace with hash -1676338668, now seen corresponding path program 3 times
[2022-01-10 20:12:59,248 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 20:12:59,248 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540670211]
[2022-01-10 20:12:59,248 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 20:12:59,249 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 20:12:59,296 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 20:12:59,530 INFO  L134       CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 20:12:59,530 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 20:12:59,530 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540670211]
[2022-01-10 20:12:59,530 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540670211] provided 0 perfect and 1 imperfect interpolant sequences
[2022-01-10 20:12:59,531 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708755864]
[2022-01-10 20:12:59,531 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2022-01-10 20:12:59,531 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-10 20:12:59,531 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-10 20:12:59,544 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 20:12:59,544 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 20:12:59,657 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s)
[2022-01-10 20:12:59,658 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-01-10 20:12:59,659 INFO  L263         TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 74 conjunts are in the unsatisfiable core
[2022-01-10 20:12:59,661 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 20:12:59,924 INFO  L134       CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 20:12:59,924 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-01-10 20:13:01,566 INFO  L134       CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 20:13:01,566 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [708755864] provided 0 perfect and 2 imperfect interpolant sequences
[2022-01-10 20:13:01,566 INFO  L186   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-01-10 20:13:01,566 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 19] total 48
[2022-01-10 20:13:01,566 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208775009]
[2022-01-10 20:13:01,566 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-01-10 20:13:01,567 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 48 states
[2022-01-10 20:13:01,567 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-10 20:13:01,567 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants.
[2022-01-10 20:13:01,568 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=1903, Unknown=0, NotChecked=0, Total=2256
[2022-01-10 20:13:01,568 INFO  L87              Difference]: Start difference. First operand 21 states and 21 transitions. Second operand  has 48 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 48 states have internal predecessors, (53), 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 20:13:12,440 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 20:13:12,440 INFO  L93              Difference]: Finished difference Result 55 states and 62 transitions.
[2022-01-10 20:13:12,441 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. 
[2022-01-10 20:13:12,441 INFO  L78                 Accepts]: Start accepts. Automaton has  has 48 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 48 states have internal predecessors, (53), 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 20
[2022-01-10 20:13:12,441 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 20:13:12,442 INFO  L225             Difference]: With dead ends: 55
[2022-01-10 20:13:12,442 INFO  L226             Difference]: Without dead ends: 37
[2022-01-10 20:13:12,444 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2112 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=1664, Invalid=6526, Unknown=0, NotChecked=0, Total=8190
[2022-01-10 20:13:12,444 INFO  L933         BasicCegarLoop]: 4 mSDtfsCounter, 166 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time
[2022-01-10 20:13:12,445 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 61 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time]
[2022-01-10 20:13:12,445 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 37 states.
[2022-01-10 20:13:12,450 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37.
[2022-01-10 20:13:12,450 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 37 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 36 states have internal predecessors, (37), 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 20:13:12,450 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions.
[2022-01-10 20:13:12,450 INFO  L78                 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 20
[2022-01-10 20:13:12,450 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 20:13:12,450 INFO  L470      AbstractCegarLoop]: Abstraction has 37 states and 37 transitions.
[2022-01-10 20:13:12,451 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 48 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 48 states have internal predecessors, (53), 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 20:13:12,451 INFO  L276                IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions.
[2022-01-10 20:13:12,451 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 37
[2022-01-10 20:13:12,451 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 20:13:12,451 INFO  L514         BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1]
[2022-01-10 20:13:12,457 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 20:13:12,655 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 20:13:12,655 INFO  L402      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 20:13:12,655 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 20:13:12,656 INFO  L85        PathProgramCache]: Analyzing trace with hash 1343186980, now seen corresponding path program 4 times
[2022-01-10 20:13:12,656 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 20:13:12,656 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760816147]
[2022-01-10 20:13:12,656 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 20:13:12,656 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 20:13:12,726 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 20:13:13,393 INFO  L134       CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 20:13:13,393 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 20:13:13,393 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760816147]
[2022-01-10 20:13:13,394 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760816147] provided 0 perfect and 1 imperfect interpolant sequences
[2022-01-10 20:13:13,394 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743899424]
[2022-01-10 20:13:13,394 INFO  L93    rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
[2022-01-10 20:13:13,394 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-10 20:13:13,394 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-10 20:13:13,398 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 20:13:13,399 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 20:13:13,586 INFO  L228   tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2022-01-10 20:13:13,587 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-01-10 20:13:13,590 INFO  L263         TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 159 conjunts are in the unsatisfiable core
[2022-01-10 20:13:13,593 INFO  L286         TraceCheckSpWp]: Computing forward predicates...