/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInlineTransformed.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_LAZY.epf -i ../../../trunk/examples/svcomp/verifythis/elimination_max_rec.c


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


This is Ultimate 0.2.2-dev-a10ec3b
[2022-01-10 18:25:58,323 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2022-01-10 18:25:58,325 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2022-01-10 18:25:58,375 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2022-01-10 18:25:58,375 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2022-01-10 18:25:58,378 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2022-01-10 18:25:58,380 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2022-01-10 18:25:58,382 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2022-01-10 18:25:58,383 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2022-01-10 18:25:58,386 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
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[2022-01-10 18:25:58,388 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2022-01-10 18:25:58,388 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2022-01-10 18:25:58,389 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2022-01-10 18:25:58,390 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2022-01-10 18:25:58,392 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2022-01-10 18:25:58,393 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2022-01-10 18:25:58,393 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2022-01-10 18:25:58,395 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2022-01-10 18:25:58,399 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2022-01-10 18:25:58,400 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2022-01-10 18:25:58,400 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2022-01-10 18:25:58,401 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2022-01-10 18:25:58,402 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2022-01-10 18:25:58,407 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2022-01-10 18:25:58,407 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2022-01-10 18:25:58,407 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2022-01-10 18:25:58,408 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2022-01-10 18:25:58,408 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2022-01-10 18:25:58,409 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2022-01-10 18:25:58,409 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2022-01-10 18:25:58,409 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2022-01-10 18:25:58,411 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2022-01-10 18:25:58,411 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2022-01-10 18:25:58,412 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2022-01-10 18:25:58,412 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2022-01-10 18:25:58,413 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2022-01-10 18:25:58,413 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2022-01-10 18:25:58,413 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2022-01-10 18:25:58,413 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2022-01-10 18:25:58,414 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2022-01-10 18:25:58,414 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_LAZY.epf
[2022-01-10 18:25:58,439 INFO  L113        SettingsManager]: Loading preferences was successful
[2022-01-10 18:25:58,439 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2022-01-10 18:25:58,439 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2022-01-10 18:25:58,440 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2022-01-10 18:25:58,440 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2022-01-10 18:25:58,440 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2022-01-10 18:25:58,441 INFO  L138        SettingsManager]:  * Use SBE=true
[2022-01-10 18:25:58,441 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2022-01-10 18:25:58,441 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2022-01-10 18:25:58,441 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2022-01-10 18:25:58,441 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2022-01-10 18:25:58,442 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2022-01-10 18:25:58,442 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2022-01-10 18:25:58,442 INFO  L138        SettingsManager]:  * Adapt memory model on pointer casts if necessary=true
[2022-01-10 18:25:58,442 INFO  L138        SettingsManager]:  * Use bitvectors instead of ints=true
[2022-01-10 18:25:58,442 INFO  L138        SettingsManager]:  * Memory model=HoenickeLindenmann_4ByteResolution
[2022-01-10 18:25:58,442 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2022-01-10 18:25:58,442 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2022-01-10 18:25:58,442 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2022-01-10 18:25:58,442 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2022-01-10 18:25:58,443 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2022-01-10 18:25:58,443 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-01-10 18:25:58,444 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2022-01-10 18:25:58,444 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2022-01-10 18:25:58,444 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2022-01-10 18:25:58,444 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2022-01-10 18:25:58,444 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2022-01-10 18:25:58,444 INFO  L138        SettingsManager]:  * Large block encoding in concurrent analysis=OFF
[2022-01-10 18:25:58,444 INFO  L138        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2022-01-10 18:25:58,444 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2022-01-10 18:25:58,445 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2022-01-10 18:25:58,445 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2022-01-10 18:25:58,445 INFO  L136        SettingsManager]: Preferences of IcfgTransformer differ from their defaults:
[2022-01-10 18:25:58,446 INFO  L138        SettingsManager]:  * TransformationType=BV_TO_INT_LAZY
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int)
WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN;
[2022-01-10 18:25:58,651 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2022-01-10 18:25:58,688 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2022-01-10 18:25:58,691 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2022-01-10 18:25:58,691 INFO  L271        PluginConnector]: Initializing CDTParser...
[2022-01-10 18:25:58,692 INFO  L275        PluginConnector]: CDTParser initialized
[2022-01-10 18:25:58,693 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/elimination_max_rec.c
[2022-01-10 18:25:58,799 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/645474f24/e3e87805b8d74feb9a3344887032bf75/FLAGf79a80288
[2022-01-10 18:25:59,179 INFO  L306              CDTParser]: Found 1 translation units.
[2022-01-10 18:25:59,179 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/verifythis/elimination_max_rec.c
[2022-01-10 18:25:59,183 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/645474f24/e3e87805b8d74feb9a3344887032bf75/FLAGf79a80288
[2022-01-10 18:25:59,197 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/645474f24/e3e87805b8d74feb9a3344887032bf75
[2022-01-10 18:25:59,199 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2022-01-10 18:25:59,200 INFO  L131        ToolchainWalker]: Walking toolchain with 6 elements.
[2022-01-10 18:25:59,204 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2022-01-10 18:25:59,204 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2022-01-10 18:25:59,206 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2022-01-10 18:25:59,207 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:25:59" (1/1) ...
[2022-01-10 18:25:59,207 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38b08292 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:25:59, skipping insertion in model container
[2022-01-10 18:25:59,207 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:25:59" (1/1) ...
[2022-01-10 18:25:59,214 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2022-01-10 18:25:59,223 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2022-01-10 18:25:59,376 WARN  L230   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/verifythis/elimination_max_rec.c[493,506]
[2022-01-10 18:25:59,395 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-01-10 18:25:59,403 INFO  L203         MainTranslator]: Completed pre-run
[2022-01-10 18:25:59,411 WARN  L230   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/verifythis/elimination_max_rec.c[493,506]
[2022-01-10 18:25:59,416 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-01-10 18:25:59,424 INFO  L208         MainTranslator]: Completed translation
[2022-01-10 18:25:59,424 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:25:59 WrapperNode
[2022-01-10 18:25:59,424 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2022-01-10 18:25:59,425 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2022-01-10 18:25:59,425 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2022-01-10 18:25:59,425 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2022-01-10 18:25:59,429 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:25:59" (1/1) ...
[2022-01-10 18:25:59,441 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:25:59" (1/1) ...
[2022-01-10 18:25:59,458 INFO  L137                Inliner]: procedures = 21, calls = 20, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 78
[2022-01-10 18:25:59,458 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2022-01-10 18:25:59,459 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2022-01-10 18:25:59,459 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2022-01-10 18:25:59,459 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2022-01-10 18:25:59,464 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:25:59" (1/1) ...
[2022-01-10 18:25:59,464 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:25:59" (1/1) ...
[2022-01-10 18:25:59,469 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:25:59" (1/1) ...
[2022-01-10 18:25:59,469 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:25:59" (1/1) ...
[2022-01-10 18:25:59,480 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:25:59" (1/1) ...
[2022-01-10 18:25:59,482 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:25:59" (1/1) ...
[2022-01-10 18:25:59,489 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:25:59" (1/1) ...
[2022-01-10 18:25:59,492 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2022-01-10 18:25:59,493 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2022-01-10 18:25:59,493 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2022-01-10 18:25:59,493 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2022-01-10 18:25:59,494 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:25:59" (1/1) ...
[2022-01-10 18:25:59,498 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-01-10 18:25:59,505 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-10 18:25:59,516 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2022-01-10 18:25:59,533 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2022-01-10 18:25:59,548 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2022-01-10 18:25:59,548 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1
[2022-01-10 18:25:59,548 INFO  L130     BoogieDeclarations]: Found specification of procedure check
[2022-01-10 18:25:59,548 INFO  L138     BoogieDeclarations]: Found implementation of procedure check
[2022-01-10 18:25:59,548 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap
[2022-01-10 18:25:59,548 INFO  L130     BoogieDeclarations]: Found specification of procedure read~intINTTYPE4
[2022-01-10 18:25:59,548 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2022-01-10 18:25:59,548 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2022-01-10 18:25:59,548 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2022-01-10 18:25:59,620 INFO  L234             CfgBuilder]: Building ICFG
[2022-01-10 18:25:59,621 INFO  L260             CfgBuilder]: Building CFG for each procedure with an implementation
[2022-01-10 18:25:59,801 INFO  L275             CfgBuilder]: Performing block encoding
[2022-01-10 18:25:59,808 INFO  L294             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2022-01-10 18:25:59,809 INFO  L299             CfgBuilder]: Removed 0 assume(true) statements.
[2022-01-10 18:25:59,810 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:25:59 BoogieIcfgContainer
[2022-01-10 18:25:59,810 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2022-01-10 18:25:59,811 INFO  L113        PluginConnector]: ------------------------IcfgTransformer----------------------------
[2022-01-10 18:25:59,811 INFO  L271        PluginConnector]: Initializing IcfgTransformer...
[2022-01-10 18:25:59,813 INFO  L275        PluginConnector]: IcfgTransformer initialized
[2022-01-10 18:25:59,815 INFO  L185        PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:25:59" (1/1) ...
[2022-01-10 18:25:59,939 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 06:25:59 BasicIcfg
[2022-01-10 18:25:59,939 INFO  L132        PluginConnector]: ------------------------ END IcfgTransformer----------------------------
[2022-01-10 18:25:59,940 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2022-01-10 18:25:59,940 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2022-01-10 18:25:59,944 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2022-01-10 18:25:59,944 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 06:25:59" (1/4) ...
[2022-01-10 18:25:59,945 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26168934 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:25:59, skipping insertion in model container
[2022-01-10 18:25:59,960 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:25:59" (2/4) ...
[2022-01-10 18:25:59,960 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26168934 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:25:59, skipping insertion in model container
[2022-01-10 18:25:59,960 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:25:59" (3/4) ...
[2022-01-10 18:25:59,961 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26168934 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 06:25:59, skipping insertion in model container
[2022-01-10 18:25:59,961 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 06:25:59" (4/4) ...
[2022-01-10 18:25:59,961 INFO  L111   eAbstractionObserver]: Analyzing ICFG elimination_max_rec.cTransformedIcfg
[2022-01-10 18:25:59,968 INFO  L204   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2022-01-10 18:25:59,968 INFO  L163   ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations.
[2022-01-10 18:26:00,002 INFO  L338      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2022-01-10 18:26:00,008 INFO  L339      AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR
[2022-01-10 18:26:00,008 INFO  L340      AbstractCegarLoop]: Starting to check reachability of 2 error locations.
[2022-01-10 18:26:00,018 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 28 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 24 states have internal predecessors, (31), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2022-01-10 18:26:00,020 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 12
[2022-01-10 18:26:00,020 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 18:26:00,021 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 18:26:00,021 INFO  L402      AbstractCegarLoop]: === Iteration 1 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION, checkErr1ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 18:26:00,024 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 18:26:00,024 INFO  L85        PathProgramCache]: Analyzing trace with hash -2060906134, now seen corresponding path program 1 times
[2022-01-10 18:26:00,029 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 18:26:00,030 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829525485]
[2022-01-10 18:26:00,030 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 18:26:00,031 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 18:26:00,123 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 18:26:00,169 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 18:26:00,169 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 18:26:00,170 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829525485]
[2022-01-10 18:26:00,170 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829525485] provided 1 perfect and 0 imperfect interpolant sequences
[2022-01-10 18:26:00,171 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-01-10 18:26:00,171 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2022-01-10 18:26:00,172 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512005840]
[2022-01-10 18:26:00,173 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-10 18:26:00,176 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 2 states
[2022-01-10 18:26:00,176 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-10 18:26:00,195 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2022-01-10 18:26:00,196 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2022-01-10 18:26:00,197 INFO  L87              Difference]: Start difference. First operand  has 28 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 24 states have internal predecessors, (31), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand  has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 18:26:00,210 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 18:26:00,210 INFO  L93              Difference]: Finished difference Result 53 states and 68 transitions.
[2022-01-10 18:26:00,211 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. 
[2022-01-10 18:26:00,212 INFO  L78                 Accepts]: Start accepts. Automaton has  has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11
[2022-01-10 18:26:00,212 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 18:26:00,219 INFO  L225             Difference]: With dead ends: 53
[2022-01-10 18:26:00,219 INFO  L226             Difference]: Without dead ends: 24
[2022-01-10 18:26:00,222 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 18:26:00,225 INFO  L933         BasicCegarLoop]: 31 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, 31 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 18:26:00,225 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-01-10 18:26:00,235 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24 states.
[2022-01-10 18:26:00,245 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24.
[2022-01-10 18:26:00,246 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 24 states, 19 states have (on average 1.263157894736842) internal successors, (24), 21 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2022-01-10 18:26:00,247 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions.
[2022-01-10 18:26:00,249 INFO  L78                 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 11
[2022-01-10 18:26:00,249 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 18:26:00,249 INFO  L470      AbstractCegarLoop]: Abstraction has 24 states and 27 transitions.
[2022-01-10 18:26:00,249 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 18:26:00,250 INFO  L276                IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions.
[2022-01-10 18:26:00,251 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 12
[2022-01-10 18:26:00,251 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 18:26:00,252 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 18:26:00,252 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2022-01-10 18:26:00,252 INFO  L402      AbstractCegarLoop]: === Iteration 2 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION, checkErr1ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 18:26:00,253 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 18:26:00,254 INFO  L85        PathProgramCache]: Analyzing trace with hash 426606699, now seen corresponding path program 1 times
[2022-01-10 18:26:00,254 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 18:26:00,254 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169589790]
[2022-01-10 18:26:00,254 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 18:26:00,254 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 18:26:00,347 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 18:26:00,579 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 18:26:00,579 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 18:26:00,579 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169589790]
[2022-01-10 18:26:00,580 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169589790] provided 1 perfect and 0 imperfect interpolant sequences
[2022-01-10 18:26:00,580 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-01-10 18:26:00,580 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2022-01-10 18:26:00,580 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617133480]
[2022-01-10 18:26:00,580 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-10 18:26:00,581 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2022-01-10 18:26:00,581 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-10 18:26:00,581 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2022-01-10 18:26:00,581 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2022-01-10 18:26:00,582 INFO  L87              Difference]: Start difference. First operand 24 states and 27 transitions. Second operand  has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 18:26:00,673 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 18:26:00,673 INFO  L93              Difference]: Finished difference Result 48 states and 54 transitions.
[2022-01-10 18:26:00,674 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2022-01-10 18:26:00,674 INFO  L78                 Accepts]: Start accepts. Automaton has  has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11
[2022-01-10 18:26:00,674 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 18:26:00,674 INFO  L225             Difference]: With dead ends: 48
[2022-01-10 18:26:00,675 INFO  L226             Difference]: Without dead ends: 25
[2022-01-10 18:26:00,675 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56
[2022-01-10 18:26:00,676 INFO  L933         BasicCegarLoop]: 23 mSDtfsCounter, 7 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-01-10 18:26:00,676 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 107 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-01-10 18:26:00,677 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 25 states.
[2022-01-10 18:26:00,679 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25.
[2022-01-10 18:26:00,679 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 25 states, 20 states have (on average 1.25) internal successors, (25), 22 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2022-01-10 18:26:00,680 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions.
[2022-01-10 18:26:00,680 INFO  L78                 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 11
[2022-01-10 18:26:00,680 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 18:26:00,680 INFO  L470      AbstractCegarLoop]: Abstraction has 25 states and 28 transitions.
[2022-01-10 18:26:00,680 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 18:26:00,680 INFO  L276                IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions.
[2022-01-10 18:26:00,680 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 13
[2022-01-10 18:26:00,681 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 18:26:00,681 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 18:26:00,681 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2022-01-10 18:26:00,681 INFO  L402      AbstractCegarLoop]: === Iteration 3 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION, checkErr1ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 18:26:00,681 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 18:26:00,681 INFO  L85        PathProgramCache]: Analyzing trace with hash 1973990634, now seen corresponding path program 1 times
[2022-01-10 18:26:00,681 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 18:26:00,682 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588703164]
[2022-01-10 18:26:00,682 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 18:26:00,682 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 18:26:00,712 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 18:26:00,859 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-01-10 18:26:00,859 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 18:26:00,860 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588703164]
[2022-01-10 18:26:00,860 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588703164] provided 1 perfect and 0 imperfect interpolant sequences
[2022-01-10 18:26:00,860 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-01-10 18:26:00,860 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2022-01-10 18:26:00,860 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411126037]
[2022-01-10 18:26:00,860 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-10 18:26:00,861 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2022-01-10 18:26:00,861 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-10 18:26:00,861 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2022-01-10 18:26:00,861 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42
[2022-01-10 18:26:00,861 INFO  L87              Difference]: Start difference. First operand 25 states and 28 transitions. Second operand  has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 18:26:00,982 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 18:26:00,982 INFO  L93              Difference]: Finished difference Result 46 states and 51 transitions.
[2022-01-10 18:26:00,983 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2022-01-10 18:26:00,983 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 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 18:26:00,983 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 18:26:00,985 INFO  L225             Difference]: With dead ends: 46
[2022-01-10 18:26:00,985 INFO  L226             Difference]: Without dead ends: 39
[2022-01-10 18:26:00,985 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90
[2022-01-10 18:26:00,986 INFO  L933         BasicCegarLoop]: 22 mSDtfsCounter, 37 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-01-10 18:26:00,986 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 111 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-01-10 18:26:00,987 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 39 states.
[2022-01-10 18:26:00,991 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35.
[2022-01-10 18:26:00,992 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 35 states, 29 states have (on average 1.206896551724138) internal successors, (35), 30 states have internal predecessors, (35), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2022-01-10 18:26:00,992 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions.
[2022-01-10 18:26:00,993 INFO  L78                 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 12
[2022-01-10 18:26:00,993 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 18:26:00,993 INFO  L470      AbstractCegarLoop]: Abstraction has 35 states and 40 transitions.
[2022-01-10 18:26:00,993 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 18:26:00,993 INFO  L276                IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions.
[2022-01-10 18:26:00,994 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 19
[2022-01-10 18:26:00,994 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 18:26:00,994 INFO  L514         BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 18:26:00,994 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2022-01-10 18:26:00,994 INFO  L402      AbstractCegarLoop]: === Iteration 4 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION, checkErr1ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 18:26:00,995 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 18:26:00,995 INFO  L85        PathProgramCache]: Analyzing trace with hash 1087383764, now seen corresponding path program 1 times
[2022-01-10 18:26:00,995 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 18:26:00,995 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635381945]
[2022-01-10 18:26:00,995 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 18:26:00,995 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 18:26:01,073 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 18:26:01,426 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-01-10 18:26:01,426 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 18:26:01,426 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635381945]
[2022-01-10 18:26:01,427 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635381945] provided 0 perfect and 1 imperfect interpolant sequences
[2022-01-10 18:26:01,427 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855689791]
[2022-01-10 18:26:01,427 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 18:26:01,427 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-10 18:26:01,427 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-10 18:26:01,432 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-01-10 18:26:01,459 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2022-01-10 18:26:01,585 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 18:26:01,587 INFO  L263         TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 31 conjunts are in the unsatisfiable core
[2022-01-10 18:26:01,591 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 18:26:02,068 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-01-10 18:26:02,068 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-01-10 18:26:02,533 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-01-10 18:26:02,533 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [855689791] provided 0 perfect and 2 imperfect interpolant sequences
[2022-01-10 18:26:02,533 INFO  L186   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-01-10 18:26:02,533 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 24
[2022-01-10 18:26:02,534 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426167507]
[2022-01-10 18:26:02,534 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-01-10 18:26:02,536 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 24 states
[2022-01-10 18:26:02,537 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-10 18:26:02,537 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants.
[2022-01-10 18:26:02,538 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552
[2022-01-10 18:26:02,538 INFO  L87              Difference]: Start difference. First operand 35 states and 40 transitions. Second operand  has 24 states, 23 states have (on average 1.565217391304348) internal successors, (36), 18 states have internal predecessors, (36), 5 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 18:26:12,758 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 18:26:12,759 INFO  L93              Difference]: Finished difference Result 222 states and 267 transitions.
[2022-01-10 18:26:12,759 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. 
[2022-01-10 18:26:12,759 INFO  L78                 Accepts]: Start accepts. Automaton has  has 24 states, 23 states have (on average 1.565217391304348) internal successors, (36), 18 states have internal predecessors, (36), 5 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18
[2022-01-10 18:26:12,760 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 18:26:12,762 INFO  L225             Difference]: With dead ends: 222
[2022-01-10 18:26:12,762 INFO  L226             Difference]: Without dead ends: 220
[2022-01-10 18:26:12,764 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2148 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=1201, Invalid=5605, Unknown=0, NotChecked=0, Total=6806
[2022-01-10 18:26:12,764 INFO  L933         BasicCegarLoop]: 56 mSDtfsCounter, 714 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 834 mSolverCounterSat, 321 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 714 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 1155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 321 IncrementalHoareTripleChecker+Valid, 834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time
[2022-01-10 18:26:12,766 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [714 Valid, 576 Invalid, 1155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [321 Valid, 834 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time]
[2022-01-10 18:26:12,766 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 220 states.
[2022-01-10 18:26:12,785 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 121.
[2022-01-10 18:26:12,786 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 121 states, 95 states have (on average 1.263157894736842) internal successors, (120), 104 states have internal predecessors, (120), 17 states have call successors, (17), 8 states have call predecessors, (17), 7 states have return successors, (16), 8 states have call predecessors, (16), 16 states have call successors, (16)
[2022-01-10 18:26:12,787 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 153 transitions.
[2022-01-10 18:26:12,788 INFO  L78                 Accepts]: Start accepts. Automaton has 121 states and 153 transitions. Word has length 18
[2022-01-10 18:26:12,788 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 18:26:12,788 INFO  L470      AbstractCegarLoop]: Abstraction has 121 states and 153 transitions.
[2022-01-10 18:26:12,788 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 24 states, 23 states have (on average 1.565217391304348) internal successors, (36), 18 states have internal predecessors, (36), 5 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 18:26:12,788 INFO  L276                IsEmpty]: Start isEmpty. Operand 121 states and 153 transitions.
[2022-01-10 18:26:12,789 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 24
[2022-01-10 18:26:12,789 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 18:26:12,789 INFO  L514         BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 18:26:12,806 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 18:26:12,998 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-10 18:26:12,999 INFO  L402      AbstractCegarLoop]: === Iteration 5 === Targeting checkErr1ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION, checkErr1ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 18:26:12,999 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 18:26:12,999 INFO  L85        PathProgramCache]: Analyzing trace with hash -263773961, now seen corresponding path program 1 times
[2022-01-10 18:26:12,999 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 18:26:12,999 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433517936]
[2022-01-10 18:26:13,000 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 18:26:13,000 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 18:26:13,087 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 18:26:13,421 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13
[2022-01-10 18:26:13,424 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 18:26:13,426 INFO  L134       CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 18:26:13,426 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 18:26:13,427 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433517936]
[2022-01-10 18:26:13,427 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433517936] provided 0 perfect and 1 imperfect interpolant sequences
[2022-01-10 18:26:13,427 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144583234]
[2022-01-10 18:26:13,427 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 18:26:13,427 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-10 18:26:13,427 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-10 18:26:13,433 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-01-10 18:26:13,473 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2022-01-10 18:26:14,521 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 18:26:14,523 INFO  L263         TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 23 conjunts are in the unsatisfiable core
[2022-01-10 18:26:14,526 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 18:26:15,878 INFO  L134       CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 18:26:15,878 INFO  L328         TraceCheckSpWp]: Computing backward predicates...