/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_BITWISE.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/Mono1_1-1.c


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


This is Ultimate 0.2.2-dev-a10ec3b
[2022-01-10 08:39:43,105 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2022-01-10 08:39:43,107 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2022-01-10 08:39:43,176 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2022-01-10 08:39:43,177 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2022-01-10 08:39:43,179 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2022-01-10 08:39:43,181 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
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[2022-01-10 08:39:43,194 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2022-01-10 08:39:43,196 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2022-01-10 08:39:43,197 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2022-01-10 08:39:43,199 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2022-01-10 08:39:43,200 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2022-01-10 08:39:43,201 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2022-01-10 08:39:43,203 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2022-01-10 08:39:43,204 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2022-01-10 08:39:43,205 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2022-01-10 08:39:43,206 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2022-01-10 08:39:43,207 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2022-01-10 08:39:43,207 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2022-01-10 08:39:43,209 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2022-01-10 08:39:43,209 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2022-01-10 08:39:43,209 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2022-01-10 08:39:43,210 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2022-01-10 08:39:43,210 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2022-01-10 08:39:43,211 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2022-01-10 08:39:43,211 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2022-01-10 08:39:43,212 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2022-01-10 08:39:43,212 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2022-01-10 08:39:43,213 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2022-01-10 08:39:43,213 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2022-01-10 08:39:43,214 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2022-01-10 08:39:43,214 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
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[2022-01-10 08:39:43,215 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2022-01-10 08:39:43,219 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2022-01-10 08:39:43,220 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_BITWISE.epf
[2022-01-10 08:39:43,250 INFO  L113        SettingsManager]: Loading preferences was successful
[2022-01-10 08:39:43,251 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2022-01-10 08:39:43,251 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2022-01-10 08:39:43,251 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2022-01-10 08:39:43,252 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2022-01-10 08:39:43,252 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2022-01-10 08:39:43,252 INFO  L138        SettingsManager]:  * Use SBE=true
[2022-01-10 08:39:43,252 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2022-01-10 08:39:43,253 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2022-01-10 08:39:43,253 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2022-01-10 08:39:43,253 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2022-01-10 08:39:43,254 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2022-01-10 08:39:43,254 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2022-01-10 08:39:43,254 INFO  L138        SettingsManager]:  * Adapt memory model on pointer casts if necessary=true
[2022-01-10 08:39:43,254 INFO  L138        SettingsManager]:  * Use bitvectors instead of ints=true
[2022-01-10 08:39:43,254 INFO  L138        SettingsManager]:  * Memory model=HoenickeLindenmann_4ByteResolution
[2022-01-10 08:39:43,254 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2022-01-10 08:39:43,254 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2022-01-10 08:39:43,254 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2022-01-10 08:39:43,254 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2022-01-10 08:39:43,255 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2022-01-10 08:39:43,255 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-01-10 08:39:43,256 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2022-01-10 08:39:43,256 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2022-01-10 08:39:43,256 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2022-01-10 08:39:43,256 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2022-01-10 08:39:43,256 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2022-01-10 08:39:43,256 INFO  L138        SettingsManager]:  * Large block encoding in concurrent analysis=OFF
[2022-01-10 08:39:43,256 INFO  L138        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2022-01-10 08:39:43,257 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2022-01-10 08:39:43,257 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2022-01-10 08:39:43,257 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2022-01-10 08:39:43,258 INFO  L136        SettingsManager]: Preferences of IcfgTransformer differ from their defaults:
[2022-01-10 08:39:43,258 INFO  L138        SettingsManager]:  * TransformationType=BV_TO_INT_BITWISE
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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN;
[2022-01-10 08:39:43,474 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2022-01-10 08:39:43,493 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2022-01-10 08:39:43,496 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2022-01-10 08:39:43,496 INFO  L271        PluginConnector]: Initializing CDTParser...
[2022-01-10 08:39:43,497 INFO  L275        PluginConnector]: CDTParser initialized
[2022-01-10 08:39:43,498 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/Mono1_1-1.c
[2022-01-10 08:39:43,549 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/942293de0/1306843f906a4da6bc645b7601072cee/FLAG4a089f571
[2022-01-10 08:39:43,852 INFO  L306              CDTParser]: Found 1 translation units.
[2022-01-10 08:39:43,853 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/Mono1_1-1.c
[2022-01-10 08:39:43,857 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/942293de0/1306843f906a4da6bc645b7601072cee/FLAG4a089f571
[2022-01-10 08:39:44,289 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/942293de0/1306843f906a4da6bc645b7601072cee
[2022-01-10 08:39:44,291 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2022-01-10 08:39:44,293 INFO  L131        ToolchainWalker]: Walking toolchain with 6 elements.
[2022-01-10 08:39:44,296 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2022-01-10 08:39:44,296 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2022-01-10 08:39:44,298 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2022-01-10 08:39:44,299 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 08:39:44" (1/1) ...
[2022-01-10 08:39:44,299 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41080bdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:39:44, skipping insertion in model container
[2022-01-10 08:39:44,300 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 08:39:44" (1/1) ...
[2022-01-10 08:39:44,307 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2022-01-10 08:39:44,315 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2022-01-10 08:39:44,420 WARN  L230   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/Mono1_1-1.c[313,326]
[2022-01-10 08:39:44,434 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-01-10 08:39:44,449 INFO  L203         MainTranslator]: Completed pre-run
[2022-01-10 08:39:44,463 WARN  L230   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/Mono1_1-1.c[313,326]
[2022-01-10 08:39:44,467 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-01-10 08:39:44,480 INFO  L208         MainTranslator]: Completed translation
[2022-01-10 08:39:44,480 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:39:44 WrapperNode
[2022-01-10 08:39:44,481 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2022-01-10 08:39:44,481 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2022-01-10 08:39:44,481 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2022-01-10 08:39:44,481 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2022-01-10 08:39:44,487 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:39:44" (1/1) ...
[2022-01-10 08:39:44,494 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:39:44" (1/1) ...
[2022-01-10 08:39:44,506 INFO  L137                Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 26
[2022-01-10 08:39:44,507 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2022-01-10 08:39:44,507 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2022-01-10 08:39:44,507 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2022-01-10 08:39:44,507 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2022-01-10 08:39:44,514 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:39:44" (1/1) ...
[2022-01-10 08:39:44,514 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:39:44" (1/1) ...
[2022-01-10 08:39:44,517 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:39:44" (1/1) ...
[2022-01-10 08:39:44,517 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:39:44" (1/1) ...
[2022-01-10 08:39:44,520 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:39:44" (1/1) ...
[2022-01-10 08:39:44,526 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:39:44" (1/1) ...
[2022-01-10 08:39:44,531 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:39:44" (1/1) ...
[2022-01-10 08:39:44,533 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2022-01-10 08:39:44,533 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2022-01-10 08:39:44,534 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2022-01-10 08:39:44,534 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2022-01-10 08:39:44,535 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:39:44" (1/1) ...
[2022-01-10 08:39:44,543 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-01-10 08:39:44,555 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-10 08:39:44,576 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 08:39:44,597 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 08:39:44,616 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2022-01-10 08:39:44,617 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2022-01-10 08:39:44,617 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2022-01-10 08:39:44,617 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1
[2022-01-10 08:39:44,668 INFO  L234             CfgBuilder]: Building ICFG
[2022-01-10 08:39:44,670 INFO  L260             CfgBuilder]: Building CFG for each procedure with an implementation
[2022-01-10 08:39:44,754 INFO  L275             CfgBuilder]: Performing block encoding
[2022-01-10 08:39:44,758 INFO  L294             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2022-01-10 08:39:44,758 INFO  L299             CfgBuilder]: Removed 1 assume(true) statements.
[2022-01-10 08:39:44,759 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 08:39:44 BoogieIcfgContainer
[2022-01-10 08:39:44,759 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2022-01-10 08:39:44,760 INFO  L113        PluginConnector]: ------------------------IcfgTransformer----------------------------
[2022-01-10 08:39:44,760 INFO  L271        PluginConnector]: Initializing IcfgTransformer...
[2022-01-10 08:39:44,761 INFO  L275        PluginConnector]: IcfgTransformer initialized
[2022-01-10 08:39:44,763 INFO  L185        PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 08:39:44" (1/1) ...
[2022-01-10 08:39:44,799 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 08:39:44 BasicIcfg
[2022-01-10 08:39:44,799 INFO  L132        PluginConnector]: ------------------------ END IcfgTransformer----------------------------
[2022-01-10 08:39:44,800 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2022-01-10 08:39:44,800 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2022-01-10 08:39:44,803 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2022-01-10 08:39:44,803 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 08:39:44" (1/4) ...
[2022-01-10 08:39:44,803 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@374bc359 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 08:39:44, skipping insertion in model container
[2022-01-10 08:39:44,804 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:39:44" (2/4) ...
[2022-01-10 08:39:44,804 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@374bc359 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 08:39:44, skipping insertion in model container
[2022-01-10 08:39:44,804 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 08:39:44" (3/4) ...
[2022-01-10 08:39:44,804 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@374bc359 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 08:39:44, skipping insertion in model container
[2022-01-10 08:39:44,804 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 08:39:44" (4/4) ...
[2022-01-10 08:39:44,805 INFO  L111   eAbstractionObserver]: Analyzing ICFG Mono1_1-1.cTransformedIcfg
[2022-01-10 08:39:44,809 INFO  L204   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2022-01-10 08:39:44,809 INFO  L163   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2022-01-10 08:39:44,843 INFO  L338      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2022-01-10 08:39:44,852 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 08:39:44,852 INFO  L340      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2022-01-10 08:39:44,862 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 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 08:39:44,866 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 7
[2022-01-10 08:39:44,866 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 08:39:44,866 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1]
[2022-01-10 08:39:44,867 INFO  L402      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 08:39:44,871 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 08:39:44,871 INFO  L85        PathProgramCache]: Analyzing trace with hash 1923912807, now seen corresponding path program 1 times
[2022-01-10 08:39:44,880 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 08:39:44,880 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663999178]
[2022-01-10 08:39:44,880 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 08:39:44,881 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 08:39:44,975 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 08:39:45,024 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 08:39:45,024 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 08:39:45,025 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663999178]
[2022-01-10 08:39:45,026 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663999178] provided 1 perfect and 0 imperfect interpolant sequences
[2022-01-10 08:39:45,026 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-01-10 08:39:45,027 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2022-01-10 08:39:45,028 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361090699]
[2022-01-10 08:39:45,029 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-10 08:39:45,033 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 2 states
[2022-01-10 08:39:45,033 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-10 08:39:45,061 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2022-01-10 08:39:45,063 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2022-01-10 08:39:45,065 INFO  L87              Difference]: Start difference. First operand  has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 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) 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 08:39:45,075 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 08:39:45,075 INFO  L93              Difference]: Finished difference Result 20 states and 23 transitions.
[2022-01-10 08:39:45,076 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. 
[2022-01-10 08:39:45,076 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 08:39:45,077 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 08:39:45,082 INFO  L225             Difference]: With dead ends: 20
[2022-01-10 08:39:45,082 INFO  L226             Difference]: Without dead ends: 8
[2022-01-10 08:39:45,085 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 08:39:45,088 INFO  L933         BasicCegarLoop]: 13 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, 13 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 08:39:45,089 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-01-10 08:39:45,102 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 8 states.
[2022-01-10 08:39:45,115 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8.
[2022-01-10 08:39:45,116 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 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 08:39:45,117 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions.
[2022-01-10 08:39:45,118 INFO  L78                 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6
[2022-01-10 08:39:45,118 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 08:39:45,119 INFO  L470      AbstractCegarLoop]: Abstraction has 8 states and 9 transitions.
[2022-01-10 08:39:45,119 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 08:39:45,120 INFO  L276                IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions.
[2022-01-10 08:39:45,120 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 7
[2022-01-10 08:39:45,120 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 08:39:45,121 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1]
[2022-01-10 08:39:45,121 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2022-01-10 08:39:45,121 INFO  L402      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 08:39:45,124 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 08:39:45,125 INFO  L85        PathProgramCache]: Analyzing trace with hash 1923942598, now seen corresponding path program 1 times
[2022-01-10 08:39:45,125 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 08:39:45,125 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005407933]
[2022-01-10 08:39:45,125 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 08:39:45,125 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 08:39:45,149 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 08:39:45,223 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 08:39:45,224 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 08:39:45,224 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005407933]
[2022-01-10 08:39:45,224 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005407933] provided 1 perfect and 0 imperfect interpolant sequences
[2022-01-10 08:39:45,224 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-01-10 08:39:45,224 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2022-01-10 08:39:45,224 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596454781]
[2022-01-10 08:39:45,225 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-10 08:39:45,225 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-01-10 08:39:45,226 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-10 08:39:45,226 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-01-10 08:39:45,226 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-01-10 08:39:45,226 INFO  L87              Difference]: Start difference. First operand 8 states and 9 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 08:39:45,253 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 08:39:45,254 INFO  L93              Difference]: Finished difference Result 16 states and 20 transitions.
[2022-01-10 08:39:45,254 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-01-10 08:39:45,254 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 08:39:45,254 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 08:39:45,255 INFO  L225             Difference]: With dead ends: 16
[2022-01-10 08:39:45,255 INFO  L226             Difference]: Without dead ends: 10
[2022-01-10 08:39:45,255 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 08:39:45,256 INFO  L933         BasicCegarLoop]: 7 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-01-10 08:39:45,257 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 10 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-01-10 08:39:45,257 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10 states.
[2022-01-10 08:39:45,259 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10.
[2022-01-10 08:39:45,259 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 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 08:39:45,259 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions.
[2022-01-10 08:39:45,259 INFO  L78                 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6
[2022-01-10 08:39:45,260 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 08:39:45,260 INFO  L470      AbstractCegarLoop]: Abstraction has 10 states and 11 transitions.
[2022-01-10 08:39:45,260 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 08:39:45,260 INFO  L276                IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions.
[2022-01-10 08:39:45,260 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 9
[2022-01-10 08:39:45,260 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 08:39:45,260 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 08:39:45,261 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2022-01-10 08:39:45,261 INFO  L402      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 08:39:45,261 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 08:39:45,261 INFO  L85        PathProgramCache]: Analyzing trace with hash 2102299688, now seen corresponding path program 1 times
[2022-01-10 08:39:45,261 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 08:39:45,262 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122764385]
[2022-01-10 08:39:45,262 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 08:39:45,262 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 08:39:45,299 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 08:39:45,346 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 08:39:45,346 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 08:39:45,346 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122764385]
[2022-01-10 08:39:45,346 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122764385] provided 0 perfect and 1 imperfect interpolant sequences
[2022-01-10 08:39:45,347 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749797783]
[2022-01-10 08:39:45,347 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 08:39:45,347 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-10 08:39:45,347 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-10 08:39:45,352 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 08:39:45,353 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 08:39:45,396 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 08:39:45,397 INFO  L263         TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core
[2022-01-10 08:39:45,401 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 08:39:45,440 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 08:39:45,440 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-01-10 08:39:45,497 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 08:39:45,498 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749797783] provided 0 perfect and 2 imperfect interpolant sequences
[2022-01-10 08:39:45,498 INFO  L186   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-01-10 08:39:45,498 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7
[2022-01-10 08:39:45,498 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096962568]
[2022-01-10 08:39:45,498 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-01-10 08:39:45,499 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2022-01-10 08:39:45,499 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-10 08:39:45,500 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2022-01-10 08:39:45,500 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42
[2022-01-10 08:39:45,500 INFO  L87              Difference]: Start difference. First operand 10 states and 11 transitions. Second operand  has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 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 08:39:45,550 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 08:39:45,550 INFO  L93              Difference]: Finished difference Result 20 states and 26 transitions.
[2022-01-10 08:39:45,551 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2022-01-10 08:39:45,551 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 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) Word has length 8
[2022-01-10 08:39:45,551 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 08:39:45,551 INFO  L225             Difference]: With dead ends: 20
[2022-01-10 08:39:45,551 INFO  L226             Difference]: Without dead ends: 14
[2022-01-10 08:39:45,552 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 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 08:39:45,553 INFO  L933         BasicCegarLoop]: 6 mSDtfsCounter, 4 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-01-10 08:39:45,554 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 18 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-01-10 08:39:45,554 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 14 states.
[2022-01-10 08:39:45,556 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13.
[2022-01-10 08:39:45,556 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 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 08:39:45,557 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions.
[2022-01-10 08:39:45,557 INFO  L78                 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 8
[2022-01-10 08:39:45,557 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 08:39:45,557 INFO  L470      AbstractCegarLoop]: Abstraction has 13 states and 14 transitions.
[2022-01-10 08:39:45,557 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 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 08:39:45,558 INFO  L276                IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions.
[2022-01-10 08:39:45,558 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 13
[2022-01-10 08:39:45,558 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 08:39:45,558 INFO  L514         BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 08:39:45,583 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2022-01-10 08:39:45,759 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 08:39:45,759 INFO  L402      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 08:39:45,760 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 08:39:45,760 INFO  L85        PathProgramCache]: Analyzing trace with hash 1933039853, now seen corresponding path program 1 times
[2022-01-10 08:39:45,760 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 08:39:45,760 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320525239]
[2022-01-10 08:39:45,760 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 08:39:45,760 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 08:39:45,788 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 08:39:45,859 INFO  L134       CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 08:39:45,859 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 08:39:45,859 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320525239]
[2022-01-10 08:39:45,860 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320525239] provided 0 perfect and 1 imperfect interpolant sequences
[2022-01-10 08:39:45,860 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904069052]
[2022-01-10 08:39:45,860 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 08:39:45,860 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-10 08:39:45,860 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-10 08:39:45,865 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 08:39:45,867 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 08:39:45,908 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 08:39:45,909 INFO  L263         TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjunts are in the unsatisfiable core
[2022-01-10 08:39:45,910 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 08:39:45,962 INFO  L134       CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 08:39:45,962 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-01-10 08:39:46,037 INFO  L134       CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 08:39:46,037 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904069052] provided 0 perfect and 2 imperfect interpolant sequences
[2022-01-10 08:39:46,037 INFO  L186   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-01-10 08:39:46,037 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11
[2022-01-10 08:39:46,038 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104938810]
[2022-01-10 08:39:46,038 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-01-10 08:39:46,038 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 11 states
[2022-01-10 08:39:46,038 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-10 08:39:46,039 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2022-01-10 08:39:46,039 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110
[2022-01-10 08:39:46,039 INFO  L87              Difference]: Start difference. First operand 13 states and 14 transitions. Second operand  has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 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 08:39:46,107 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 08:39:46,108 INFO  L93              Difference]: Finished difference Result 28 states and 34 transitions.
[2022-01-10 08:39:46,108 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2022-01-10 08:39:46,108 INFO  L78                 Accepts]: Start accepts. Automaton has  has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 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) Word has length 12
[2022-01-10 08:39:46,109 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 08:39:46,109 INFO  L225             Difference]: With dead ends: 28
[2022-01-10 08:39:46,109 INFO  L226             Difference]: Without dead ends: 21
[2022-01-10 08:39:46,110 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156
[2022-01-10 08:39:46,111 INFO  L933         BasicCegarLoop]: 7 mSDtfsCounter, 3 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-01-10 08:39:46,111 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 25 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-01-10 08:39:46,112 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 21 states.
[2022-01-10 08:39:46,115 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21.
[2022-01-10 08:39:46,115 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 21 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 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 08:39:46,116 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions.
[2022-01-10 08:39:46,116 INFO  L78                 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 12
[2022-01-10 08:39:46,116 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 08:39:46,116 INFO  L470      AbstractCegarLoop]: Abstraction has 21 states and 22 transitions.
[2022-01-10 08:39:46,116 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 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 08:39:46,116 INFO  L276                IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions.
[2022-01-10 08:39:46,117 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 21
[2022-01-10 08:39:46,117 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 08:39:46,117 INFO  L514         BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 08:39:46,145 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 08:39:46,339 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 08:39:46,340 INFO  L402      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 08:39:46,340 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 08:39:46,340 INFO  L85        PathProgramCache]: Analyzing trace with hash 1781693813, now seen corresponding path program 2 times
[2022-01-10 08:39:46,340 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 08:39:46,341 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128671]
[2022-01-10 08:39:46,341 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 08:39:46,341 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 08:39:46,395 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 08:39:46,525 INFO  L134       CoverageAnalysis]: Checked inductivity of 49 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 08:39:46,526 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 08:39:46,526 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128671]
[2022-01-10 08:39:46,526 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128671] provided 0 perfect and 1 imperfect interpolant sequences
[2022-01-10 08:39:46,526 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575894288]
[2022-01-10 08:39:46,527 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2022-01-10 08:39:46,527 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-10 08:39:46,527 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-10 08:39:46,528 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 08:39:46,531 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 08:39:46,605 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2022-01-10 08:39:46,605 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-01-10 08:39:46,606 INFO  L263         TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core
[2022-01-10 08:39:46,608 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 08:39:46,748 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 08:39:46,748 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-01-10 08:39:53,488 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 08:39:53,488 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575894288] provided 0 perfect and 2 imperfect interpolant sequences
[2022-01-10 08:39:53,488 INFO  L186   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-01-10 08:39:53,488 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 13] total 28
[2022-01-10 08:39:53,489 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125219292]
[2022-01-10 08:39:53,489 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-01-10 08:39:53,489 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 28 states
[2022-01-10 08:39:53,489 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-10 08:39:53,490 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants.
[2022-01-10 08:39:53,491 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=547, Unknown=0, NotChecked=0, Total=756
[2022-01-10 08:39:53,491 INFO  L87              Difference]: Start difference. First operand 21 states and 22 transitions. Second operand  has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 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 08:39:58,378 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 08:39:58,378 INFO  L93              Difference]: Finished difference Result 40 states and 51 transitions.
[2022-01-10 08:39:58,379 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. 
[2022-01-10 08:39:58,379 INFO  L78                 Accepts]: Start accepts. Automaton has  has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 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) Word has length 20
[2022-01-10 08:39:58,379 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 08:39:58,381 INFO  L225             Difference]: With dead ends: 40
[2022-01-10 08:39:58,381 INFO  L226             Difference]: Without dead ends: 31
[2022-01-10 08:39:58,382 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=404, Invalid=928, Unknown=0, NotChecked=0, Total=1332
[2022-01-10 08:39:58,383 INFO  L933         BasicCegarLoop]: 4 mSDtfsCounter, 65 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2022-01-10 08:39:58,383 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 27 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2022-01-10 08:39:58,384 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 31 states.
[2022-01-10 08:39:58,387 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31.
[2022-01-10 08:39:58,387 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 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 08:39:58,388 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions.
[2022-01-10 08:39:58,388 INFO  L78                 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 20
[2022-01-10 08:39:58,388 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 08:39:58,388 INFO  L470      AbstractCegarLoop]: Abstraction has 31 states and 36 transitions.
[2022-01-10 08:39:58,389 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 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 08:39:58,389 INFO  L276                IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions.
[2022-01-10 08:39:58,389 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 31
[2022-01-10 08:39:58,389 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 08:39:58,390 INFO  L514         BasicCegarLoop]: trace histogram [12, 7, 5, 1, 1, 1, 1, 1, 1]
[2022-01-10 08:39:58,407 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0
[2022-01-10 08:39:58,593 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 08:39:58,594 INFO  L402      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 08:39:58,594 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 08:39:58,594 INFO  L85        PathProgramCache]: Analyzing trace with hash 1669360483, now seen corresponding path program 3 times
[2022-01-10 08:39:58,594 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 08:39:58,594 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640687666]
[2022-01-10 08:39:58,595 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 08:39:58,595 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 08:39:58,621 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 08:39:58,753 INFO  L134       CoverageAnalysis]: Checked inductivity of 144 backedges. 72 proven. 56 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked.
[2022-01-10 08:39:58,753 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 08:39:58,753 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640687666]
[2022-01-10 08:39:58,754 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640687666] provided 0 perfect and 1 imperfect interpolant sequences
[2022-01-10 08:39:58,754 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589630576]
[2022-01-10 08:39:58,754 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2022-01-10 08:39:58,754 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-10 08:39:58,754 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-10 08:39:58,755 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 08:39:58,757 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 08:39:58,835 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s)
[2022-01-10 08:39:58,835 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-01-10 08:39:58,837 INFO  L263         TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 27 conjunts are in the unsatisfiable core
[2022-01-10 08:39:58,838 INFO  L286         TraceCheckSpWp]: Computing forward predicates...