/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/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound1.c


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


This is Ultimate 0.2.2-dev-a10ec3b
[2022-01-10 03:08:36,094 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2022-01-10 03:08:36,096 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2022-01-10 03:08:36,167 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2022-01-10 03:08:36,167 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2022-01-10 03:08:36,169 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2022-01-10 03:08:36,189 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
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[2022-01-10 03:08:36,192 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2022-01-10 03:08:36,193 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
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[2022-01-10 03:08:36,194 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2022-01-10 03:08:36,194 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2022-01-10 03:08:36,203 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2022-01-10 03:08:36,205 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2022-01-10 03:08:36,207 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2022-01-10 03:08:36,207 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2022-01-10 03:08:36,211 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2022-01-10 03:08:36,216 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2022-01-10 03:08:36,221 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2022-01-10 03:08:36,222 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2022-01-10 03:08:36,224 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2022-01-10 03:08:36,226 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2022-01-10 03:08:36,226 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2022-01-10 03:08:36,232 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2022-01-10 03:08:36,232 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2022-01-10 03:08:36,232 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2022-01-10 03:08:36,233 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2022-01-10 03:08:36,233 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2022-01-10 03:08:36,234 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2022-01-10 03:08:36,234 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2022-01-10 03:08:36,235 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2022-01-10 03:08:36,235 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2022-01-10 03:08:36,236 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2022-01-10 03:08:36,237 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2022-01-10 03:08:36,237 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2022-01-10 03:08:36,237 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2022-01-10 03:08:36,238 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2022-01-10 03:08:36,238 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2022-01-10 03:08:36,238 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2022-01-10 03:08:36,239 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2022-01-10 03:08:36,244 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf
[2022-01-10 03:08:36,271 INFO  L113        SettingsManager]: Loading preferences was successful
[2022-01-10 03:08:36,271 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2022-01-10 03:08:36,272 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2022-01-10 03:08:36,272 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2022-01-10 03:08:36,272 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2022-01-10 03:08:36,272 INFO  L138        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2022-01-10 03:08:36,273 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2022-01-10 03:08:36,273 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2022-01-10 03:08:36,273 INFO  L138        SettingsManager]:  * Use SBE=true
[2022-01-10 03:08:36,273 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2022-01-10 03:08:36,274 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2022-01-10 03:08:36,274 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2022-01-10 03:08:36,274 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2022-01-10 03:08:36,274 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2022-01-10 03:08:36,274 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2022-01-10 03:08:36,274 INFO  L138        SettingsManager]:  * Adapt memory model on pointer casts if necessary=true
[2022-01-10 03:08:36,274 INFO  L138        SettingsManager]:  * Use bitvectors instead of ints=true
[2022-01-10 03:08:36,274 INFO  L138        SettingsManager]:  * Memory model=HoenickeLindenmann_4ByteResolution
[2022-01-10 03:08:36,274 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2022-01-10 03:08:36,275 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2022-01-10 03:08:36,275 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2022-01-10 03:08:36,275 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2022-01-10 03:08:36,275 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2022-01-10 03:08:36,275 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-01-10 03:08:36,276 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2022-01-10 03:08:36,276 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2022-01-10 03:08:36,276 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2022-01-10 03:08:36,276 INFO  L138        SettingsManager]:  * Trace refinement strategy=WOLF
[2022-01-10 03:08:36,276 INFO  L138        SettingsManager]:  * Command for external solver=cvc4 --incremental --print-success --lang smt 
[2022-01-10 03:08:36,276 INFO  L138        SettingsManager]:  * Large block encoding in concurrent analysis=OFF
[2022-01-10 03:08:36,277 INFO  L138        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2022-01-10 03:08:36,277 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2022-01-10 03:08:36,277 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2022-01-10 03:08:36,277 INFO  L138        SettingsManager]:  * Logic for external solver=AUFBV
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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN;
[2022-01-10 03:08:36,466 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2022-01-10 03:08:36,490 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2022-01-10 03:08:36,491 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2022-01-10 03:08:36,492 INFO  L271        PluginConnector]: Initializing CDTParser...
[2022-01-10 03:08:36,492 INFO  L275        PluginConnector]: CDTParser initialized
[2022-01-10 03:08:36,493 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound1.c
[2022-01-10 03:08:36,547 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2cee1b2ee/3cbf78eaa7794e44859a57ec8a5f54ee/FLAG66d7544f2
[2022-01-10 03:08:36,892 INFO  L306              CDTParser]: Found 1 translation units.
[2022-01-10 03:08:36,892 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound1.c
[2022-01-10 03:08:36,896 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2cee1b2ee/3cbf78eaa7794e44859a57ec8a5f54ee/FLAG66d7544f2
[2022-01-10 03:08:36,905 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2cee1b2ee/3cbf78eaa7794e44859a57ec8a5f54ee
[2022-01-10 03:08:36,907 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2022-01-10 03:08:36,908 INFO  L131        ToolchainWalker]: Walking toolchain with 5 elements.
[2022-01-10 03:08:36,911 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2022-01-10 03:08:36,911 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2022-01-10 03:08:36,913 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2022-01-10 03:08:36,914 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 03:08:36" (1/1) ...
[2022-01-10 03:08:36,914 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a7f7cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:08:36, skipping insertion in model container
[2022-01-10 03:08:36,914 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 03:08:36" (1/1) ...
[2022-01-10 03:08:36,919 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2022-01-10 03:08:36,932 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2022-01-10 03:08:37,079 WARN  L230   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound1.c[490,503]
[2022-01-10 03:08:37,106 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-01-10 03:08:37,112 INFO  L203         MainTranslator]: Completed pre-run
[2022-01-10 03:08:37,123 WARN  L230   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound1.c[490,503]
[2022-01-10 03:08:37,142 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-01-10 03:08:37,149 INFO  L208         MainTranslator]: Completed translation
[2022-01-10 03:08:37,150 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:08:37 WrapperNode
[2022-01-10 03:08:37,150 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2022-01-10 03:08:37,150 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2022-01-10 03:08:37,151 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2022-01-10 03:08:37,151 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2022-01-10 03:08:37,155 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:08:37" (1/1) ...
[2022-01-10 03:08:37,165 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:08:37" (1/1) ...
[2022-01-10 03:08:37,182 INFO  L137                Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 75
[2022-01-10 03:08:37,183 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2022-01-10 03:08:37,183 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2022-01-10 03:08:37,183 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2022-01-10 03:08:37,183 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2022-01-10 03:08:37,188 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:08:37" (1/1) ...
[2022-01-10 03:08:37,188 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:08:37" (1/1) ...
[2022-01-10 03:08:37,192 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:08:37" (1/1) ...
[2022-01-10 03:08:37,193 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:08:37" (1/1) ...
[2022-01-10 03:08:37,204 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:08:37" (1/1) ...
[2022-01-10 03:08:37,206 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:08:37" (1/1) ...
[2022-01-10 03:08:37,207 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:08:37" (1/1) ...
[2022-01-10 03:08:37,208 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2022-01-10 03:08:37,209 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2022-01-10 03:08:37,209 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2022-01-10 03:08:37,209 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2022-01-10 03:08:37,210 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:08:37" (1/1) ...
[2022-01-10 03:08:37,214 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-01-10 03:08:37,222 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-10 03:08:37,236 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2022-01-10 03:08:37,257 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 03:08:37,267 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2022-01-10 03:08:37,267 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1
[2022-01-10 03:08:37,267 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2022-01-10 03:08:37,267 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2022-01-10 03:08:37,267 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2022-01-10 03:08:37,268 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2022-01-10 03:08:37,268 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2022-01-10 03:08:37,268 INFO  L138     BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2022-01-10 03:08:37,305 INFO  L234             CfgBuilder]: Building ICFG
[2022-01-10 03:08:37,306 INFO  L260             CfgBuilder]: Building CFG for each procedure with an implementation
[2022-01-10 03:08:37,598 INFO  L275             CfgBuilder]: Performing block encoding
[2022-01-10 03:08:37,601 INFO  L294             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2022-01-10 03:08:37,602 INFO  L299             CfgBuilder]: Removed 2 assume(true) statements.
[2022-01-10 03:08:37,603 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 03:08:37 BoogieIcfgContainer
[2022-01-10 03:08:37,603 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2022-01-10 03:08:37,604 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2022-01-10 03:08:37,604 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2022-01-10 03:08:37,606 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2022-01-10 03:08:37,606 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 03:08:36" (1/3) ...
[2022-01-10 03:08:37,607 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@373465e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 03:08:37, skipping insertion in model container
[2022-01-10 03:08:37,607 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:08:37" (2/3) ...
[2022-01-10 03:08:37,607 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@373465e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 03:08:37, skipping insertion in model container
[2022-01-10 03:08:37,607 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 03:08:37" (3/3) ...
[2022-01-10 03:08:37,608 INFO  L111   eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound1.c
[2022-01-10 03:08:37,610 INFO  L204   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2022-01-10 03:08:37,611 INFO  L163   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2022-01-10 03:08:37,636 INFO  L338      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2022-01-10 03:08:37,640 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 03:08:37,640 INFO  L340      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2022-01-10 03:08:37,649 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 35 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 21 states have internal predecessors, (28), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12)
[2022-01-10 03:08:37,653 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 40
[2022-01-10 03:08:37,653 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 03:08:37,653 INFO  L514         BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 03:08:37,654 INFO  L402      AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 03:08:37,659 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 03:08:37,659 INFO  L85        PathProgramCache]: Analyzing trace with hash -1146169762, now seen corresponding path program 1 times
[2022-01-10 03:08:37,666 INFO  L121   FreeRefinementEngine]: Executing refinement strategy WOLF
[2022-01-10 03:08:37,666 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [647191869]
[2022-01-10 03:08:37,667 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 03:08:37,667 INFO  L168          SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3
[2022-01-10 03:08:37,667 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat
[2022-01-10 03:08:37,669 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null)
[2022-01-10 03:08:37,727 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process
[2022-01-10 03:08:37,826 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 03:08:37,842 INFO  L263         TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 1 conjunts are in the unsatisfiable core
[2022-01-10 03:08:37,848 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 03:08:37,959 INFO  L134       CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked.
[2022-01-10 03:08:37,959 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2022-01-10 03:08:37,959 INFO  L139   FreeRefinementEngine]: Strategy WOLF found an infeasible trace
[2022-01-10 03:08:37,960 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [647191869]
[2022-01-10 03:08:37,960 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleMathsat [647191869] provided 1 perfect and 0 imperfect interpolant sequences
[2022-01-10 03:08:37,960 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-01-10 03:08:37,960 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2022-01-10 03:08:37,961 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652232470]
[2022-01-10 03:08:37,962 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-10 03:08:37,965 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 2 states
[2022-01-10 03:08:37,965 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF
[2022-01-10 03:08:37,985 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2022-01-10 03:08:37,986 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2022-01-10 03:08:37,988 INFO  L87              Difference]: Start difference. First operand  has 35 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 21 states have internal predecessors, (28), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand  has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6)
[2022-01-10 03:08:38,002 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 03:08:38,002 INFO  L93              Difference]: Finished difference Result 67 states and 112 transitions.
[2022-01-10 03:08:38,003 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. 
[2022-01-10 03:08:38,004 INFO  L78                 Accepts]: Start accepts. Automaton has  has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 39
[2022-01-10 03:08:38,004 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 03:08:38,008 INFO  L225             Difference]: With dead ends: 67
[2022-01-10 03:08:38,008 INFO  L226             Difference]: Without dead ends: 31
[2022-01-10 03:08:38,010 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 38 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 03:08:38,013 INFO  L933         BasicCegarLoop]: 46 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, 46 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 03:08:38,013 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-01-10 03:08:38,023 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 31 states.
[2022-01-10 03:08:38,038 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31.
[2022-01-10 03:08:38,039 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 31 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11)
[2022-01-10 03:08:38,040 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions.
[2022-01-10 03:08:38,041 INFO  L78                 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 39
[2022-01-10 03:08:38,041 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 03:08:38,041 INFO  L470      AbstractCegarLoop]: Abstraction has 31 states and 42 transitions.
[2022-01-10 03:08:38,041 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6)
[2022-01-10 03:08:38,042 INFO  L276                IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions.
[2022-01-10 03:08:38,043 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 41
[2022-01-10 03:08:38,043 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 03:08:38,043 INFO  L514         BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 03:08:38,054 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0
[2022-01-10 03:08:38,253 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3
[2022-01-10 03:08:38,254 INFO  L402      AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 03:08:38,256 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 03:08:38,256 INFO  L85        PathProgramCache]: Analyzing trace with hash 846808023, now seen corresponding path program 1 times
[2022-01-10 03:08:38,257 INFO  L121   FreeRefinementEngine]: Executing refinement strategy WOLF
[2022-01-10 03:08:38,257 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2096962568]
[2022-01-10 03:08:38,257 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 03:08:38,257 INFO  L168          SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3
[2022-01-10 03:08:38,257 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat
[2022-01-10 03:08:38,260 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null)
[2022-01-10 03:08:38,262 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process
[2022-01-10 03:08:38,425 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 03:08:38,441 INFO  L263         TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjunts are in the unsatisfiable core
[2022-01-10 03:08:38,443 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 03:08:38,690 INFO  L134       CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked.
[2022-01-10 03:08:38,690 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-01-10 03:08:38,880 INFO  L134       CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked.
[2022-01-10 03:08:38,880 INFO  L139   FreeRefinementEngine]: Strategy WOLF found an infeasible trace
[2022-01-10 03:08:38,880 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2096962568]
[2022-01-10 03:08:38,880 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleMathsat [2096962568] provided 0 perfect and 2 imperfect interpolant sequences
[2022-01-10 03:08:38,880 INFO  L186   FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2022-01-10 03:08:38,881 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10
[2022-01-10 03:08:38,881 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169553568]
[2022-01-10 03:08:38,881 INFO  L85    oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2022-01-10 03:08:38,882 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 10 states
[2022-01-10 03:08:38,882 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF
[2022-01-10 03:08:38,882 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2022-01-10 03:08:38,882 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90
[2022-01-10 03:08:38,882 INFO  L87              Difference]: Start difference. First operand 31 states and 42 transitions. Second operand  has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 6 states have call predecessors, (11), 4 states have call successors, (11)
[2022-01-10 03:08:39,111 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 03:08:39,112 INFO  L93              Difference]: Finished difference Result 41 states and 53 transitions.
[2022-01-10 03:08:39,112 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2022-01-10 03:08:39,112 INFO  L78                 Accepts]: Start accepts. Automaton has  has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 6 states have call predecessors, (11), 4 states have call successors, (11) Word has length 40
[2022-01-10 03:08:39,112 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 03:08:39,113 INFO  L225             Difference]: With dead ends: 41
[2022-01-10 03:08:39,113 INFO  L226             Difference]: Without dead ends: 33
[2022-01-10 03:08:39,113 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132
[2022-01-10 03:08:39,114 INFO  L933         BasicCegarLoop]: 33 mSDtfsCounter, 7 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2022-01-10 03:08:39,115 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 173 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 7 Unchecked, 0.2s Time]
[2022-01-10 03:08:39,115 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 33 states.
[2022-01-10 03:08:39,119 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33.
[2022-01-10 03:08:39,120 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 33 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11)
[2022-01-10 03:08:39,121 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions.
[2022-01-10 03:08:39,121 INFO  L78                 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 40
[2022-01-10 03:08:39,122 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 03:08:39,122 INFO  L470      AbstractCegarLoop]: Abstraction has 33 states and 44 transitions.
[2022-01-10 03:08:39,122 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 6 states have call predecessors, (11), 4 states have call successors, (11)
[2022-01-10 03:08:39,122 INFO  L276                IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions.
[2022-01-10 03:08:39,123 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 42
[2022-01-10 03:08:39,123 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 03:08:39,123 INFO  L514         BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 03:08:39,133 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0
[2022-01-10 03:08:39,331 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3
[2022-01-10 03:08:39,332 INFO  L402      AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 03:08:39,332 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 03:08:39,332 INFO  L85        PathProgramCache]: Analyzing trace with hash 481927254, now seen corresponding path program 1 times
[2022-01-10 03:08:39,333 INFO  L121   FreeRefinementEngine]: Executing refinement strategy WOLF
[2022-01-10 03:08:39,333 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [421090127]
[2022-01-10 03:08:39,333 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 03:08:39,333 INFO  L168          SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3
[2022-01-10 03:08:39,333 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat
[2022-01-10 03:08:39,335 INFO  L229       MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null)
[2022-01-10 03:08:39,347 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process
[2022-01-10 03:08:39,437 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 03:08:39,458 INFO  L263         TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 16 conjunts are in the unsatisfiable core
[2022-01-10 03:08:39,460 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 03:08:39,871 INFO  L134       CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked.
[2022-01-10 03:08:39,871 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-01-10 03:08:41,396 INFO  L134       CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked.
[2022-01-10 03:08:41,396 INFO  L139   FreeRefinementEngine]: Strategy WOLF found an infeasible trace
[2022-01-10 03:08:41,396 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [421090127]
[2022-01-10 03:08:41,396 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleMathsat [421090127] provided 1 perfect and 1 imperfect interpolant sequences
[2022-01-10 03:08:41,396 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2022-01-10 03:08:41,396 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 14
[2022-01-10 03:08:41,397 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443421626]
[2022-01-10 03:08:41,397 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-10 03:08:41,397 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2022-01-10 03:08:41,397 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF
[2022-01-10 03:08:41,397 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2022-01-10 03:08:41,398 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182
[2022-01-10 03:08:41,398 INFO  L87              Difference]: Start difference. First operand 33 states and 44 transitions. Second operand  has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6)
[2022-01-10 03:08:43,923 WARN  L534   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers []
[2022-01-10 03:08:46,136 WARN  L534   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers []
[2022-01-10 03:08:47,598 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 03:08:47,598 INFO  L93              Difference]: Finished difference Result 46 states and 61 transitions.
[2022-01-10 03:08:47,607 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2022-01-10 03:08:47,608 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 41
[2022-01-10 03:08:47,608 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 03:08:47,609 INFO  L225             Difference]: With dead ends: 46
[2022-01-10 03:08:47,609 INFO  L226             Difference]: Without dead ends: 44
[2022-01-10 03:08:47,609 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210
[2022-01-10 03:08:47,610 INFO  L933         BasicCegarLoop]: 40 mSDtfsCounter, 7 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time
[2022-01-10 03:08:47,610 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 146 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 1 Unknown, 0 Unchecked, 6.1s Time]
[2022-01-10 03:08:47,611 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 44 states.
[2022-01-10 03:08:47,615 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 39.
[2022-01-10 03:08:47,615 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 39 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 24 states have internal predecessors, (25), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12)
[2022-01-10 03:08:47,616 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions.
[2022-01-10 03:08:47,616 INFO  L78                 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 41
[2022-01-10 03:08:47,616 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 03:08:47,616 INFO  L470      AbstractCegarLoop]: Abstraction has 39 states and 50 transitions.
[2022-01-10 03:08:47,616 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6)
[2022-01-10 03:08:47,616 INFO  L276                IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions.
[2022-01-10 03:08:47,617 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 47
[2022-01-10 03:08:47,617 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 03:08:47,617 INFO  L514         BasicCegarLoop]: trace histogram [6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 03:08:47,629 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0
[2022-01-10 03:08:47,826 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3
[2022-01-10 03:08:47,826 INFO  L402      AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 03:08:47,827 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 03:08:47,827 INFO  L85        PathProgramCache]: Analyzing trace with hash -1626076469, now seen corresponding path program 1 times
[2022-01-10 03:08:47,827 INFO  L121   FreeRefinementEngine]: Executing refinement strategy WOLF
[2022-01-10 03:08:47,827 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [953466044]
[2022-01-10 03:08:47,827 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 03:08:47,827 INFO  L168          SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3
[2022-01-10 03:08:47,827 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat
[2022-01-10 03:08:47,829 INFO  L229       MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null)
[2022-01-10 03:08:47,833 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process
[2022-01-10 03:08:47,988 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 03:08:48,007 INFO  L263         TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 15 conjunts are in the unsatisfiable core
[2022-01-10 03:08:48,009 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 03:08:48,950 INFO  L134       CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked.
[2022-01-10 03:08:48,950 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-01-10 03:08:55,571 INFO  L134       CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked.
[2022-01-10 03:08:55,572 INFO  L139   FreeRefinementEngine]: Strategy WOLF found an infeasible trace
[2022-01-10 03:08:55,572 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [953466044]
[2022-01-10 03:08:55,572 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleMathsat [953466044] provided 1 perfect and 1 imperfect interpolant sequences
[2022-01-10 03:08:55,572 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2022-01-10 03:08:55,572 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13
[2022-01-10 03:08:55,572 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318267460]
[2022-01-10 03:08:55,572 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-10 03:08:55,573 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2022-01-10 03:08:55,573 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF
[2022-01-10 03:08:55,573 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2022-01-10 03:08:55,573 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156
[2022-01-10 03:08:55,573 INFO  L87              Difference]: Start difference. First operand 39 states and 50 transitions. Second operand  has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7)
[2022-01-10 03:09:00,223 WARN  L534   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers []
[2022-01-10 03:09:02,674 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 03:09:02,675 INFO  L93              Difference]: Finished difference Result 54 states and 70 transitions.
[2022-01-10 03:09:02,692 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2022-01-10 03:09:02,692 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 46
[2022-01-10 03:09:02,693 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 03:09:02,694 INFO  L225             Difference]: With dead ends: 54
[2022-01-10 03:09:02,694 INFO  L226             Difference]: Without dead ends: 52
[2022-01-10 03:09:02,695 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182
[2022-01-10 03:09:02,695 INFO  L933         BasicCegarLoop]: 44 mSDtfsCounter, 6 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time
[2022-01-10 03:09:02,696 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 155 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time]
[2022-01-10 03:09:02,696 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 52 states.
[2022-01-10 03:09:02,701 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51.
[2022-01-10 03:09:02,702 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 51 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 31 states have internal predecessors, (32), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17)
[2022-01-10 03:09:02,702 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 67 transitions.
[2022-01-10 03:09:02,702 INFO  L78                 Accepts]: Start accepts. Automaton has 51 states and 67 transitions. Word has length 46
[2022-01-10 03:09:02,703 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 03:09:02,703 INFO  L470      AbstractCegarLoop]: Abstraction has 51 states and 67 transitions.
[2022-01-10 03:09:02,703 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7)
[2022-01-10 03:09:02,703 INFO  L276                IsEmpty]: Start isEmpty. Operand 51 states and 67 transitions.
[2022-01-10 03:09:02,706 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 52
[2022-01-10 03:09:02,706 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 03:09:02,706 INFO  L514         BasicCegarLoop]: trace histogram [6, 6, 6, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 03:09:02,718 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0
[2022-01-10 03:09:02,907 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3
[2022-01-10 03:09:02,907 INFO  L402      AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 03:09:02,908 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 03:09:02,908 INFO  L85        PathProgramCache]: Analyzing trace with hash 779090230, now seen corresponding path program 1 times
[2022-01-10 03:09:02,908 INFO  L121   FreeRefinementEngine]: Executing refinement strategy WOLF
[2022-01-10 03:09:02,908 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [988870783]
[2022-01-10 03:09:02,908 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 03:09:02,908 INFO  L168          SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3
[2022-01-10 03:09:02,908 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat
[2022-01-10 03:09:02,910 INFO  L229       MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null)
[2022-01-10 03:09:02,913 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process
[2022-01-10 03:09:03,120 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 03:09:03,147 INFO  L263         TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core
[2022-01-10 03:09:03,149 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 03:09:04,213 INFO  L134       CoverageAnalysis]: Checked inductivity of 68 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked.
[2022-01-10 03:09:04,213 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-01-10 03:09:10,643 INFO  L134       CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked.
[2022-01-10 03:09:10,644 INFO  L139   FreeRefinementEngine]: Strategy WOLF found an infeasible trace
[2022-01-10 03:09:10,644 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [988870783]
[2022-01-10 03:09:10,644 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleMathsat [988870783] provided 1 perfect and 1 imperfect interpolant sequences
[2022-01-10 03:09:10,644 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2022-01-10 03:09:10,644 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13
[2022-01-10 03:09:10,644 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755942738]
[2022-01-10 03:09:10,644 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-10 03:09:10,645 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2022-01-10 03:09:10,645 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF
[2022-01-10 03:09:10,645 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2022-01-10 03:09:10,645 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156
[2022-01-10 03:09:10,645 INFO  L87              Difference]: Start difference. First operand 51 states and 67 transitions. Second operand  has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8)
[2022-01-10 03:09:17,424 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 03:09:17,424 INFO  L93              Difference]: Finished difference Result 58 states and 73 transitions.
[2022-01-10 03:09:17,440 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2022-01-10 03:09:17,440 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51
[2022-01-10 03:09:17,440 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 03:09:17,441 INFO  L225             Difference]: With dead ends: 58
[2022-01-10 03:09:17,441 INFO  L226             Difference]: Without dead ends: 56
[2022-01-10 03:09:17,441 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182
[2022-01-10 03:09:17,442 INFO  L933         BasicCegarLoop]: 42 mSDtfsCounter, 6 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time
[2022-01-10 03:09:17,442 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 146 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time]
[2022-01-10 03:09:17,443 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 56 states.
[2022-01-10 03:09:17,448 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55.
[2022-01-10 03:09:17,448 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 55 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 34 states have internal predecessors, (35), 18 states have call successors, (18), 5 states have call predecessors, (18), 5 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17)
[2022-01-10 03:09:17,449 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 70 transitions.
[2022-01-10 03:09:17,449 INFO  L78                 Accepts]: Start accepts. Automaton has 55 states and 70 transitions. Word has length 51
[2022-01-10 03:09:17,449 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 03:09:17,449 INFO  L470      AbstractCegarLoop]: Abstraction has 55 states and 70 transitions.
[2022-01-10 03:09:17,449 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8)
[2022-01-10 03:09:17,449 INFO  L276                IsEmpty]: Start isEmpty. Operand 55 states and 70 transitions.
[2022-01-10 03:09:17,450 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 57
[2022-01-10 03:09:17,450 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 03:09:17,450 INFO  L514         BasicCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 03:09:17,464 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0
[2022-01-10 03:09:17,662 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3
[2022-01-10 03:09:17,662 INFO  L402      AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 03:09:17,663 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 03:09:17,663 INFO  L85        PathProgramCache]: Analyzing trace with hash -670274197, now seen corresponding path program 1 times
[2022-01-10 03:09:17,663 INFO  L121   FreeRefinementEngine]: Executing refinement strategy WOLF
[2022-01-10 03:09:17,663 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1793924]
[2022-01-10 03:09:17,663 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 03:09:17,663 INFO  L168          SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3
[2022-01-10 03:09:17,663 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat
[2022-01-10 03:09:17,664 INFO  L229       MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null)
[2022-01-10 03:09:17,665 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process
[2022-01-10 03:09:18,002 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 03:09:18,042 INFO  L263         TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 16 conjunts are in the unsatisfiable core
[2022-01-10 03:09:18,044 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 03:09:22,150 INFO  L134       CoverageAnalysis]: Checked inductivity of 78 backedges. 9 proven. 24 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked.
[2022-01-10 03:09:22,150 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-01-10 03:09:34,263 INFO  L139   FreeRefinementEngine]: Strategy WOLF found an infeasible trace
[2022-01-10 03:09:34,264 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1793924]
[2022-01-10 03:09:34,264 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleMathsat [1793924] provided 0 perfect and 1 imperfect interpolant sequences
[2022-01-10 03:09:34,264 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [62456593]
[2022-01-10 03:09:34,264 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 03:09:34,264 INFO  L168          SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt
[2022-01-10 03:09:34,264 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4
[2022-01-10 03:09:34,267 INFO  L229       MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null)
[2022-01-10 03:09:34,268 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process
[2022-01-10 03:09:34,782 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 03:09:34,784 INFO  L263         TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 12 conjunts are in the unsatisfiable core
[2022-01-10 03:09:34,786 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 03:09:41,036 INFO  L134       CoverageAnalysis]: Checked inductivity of 78 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked.
[2022-01-10 03:09:41,036 INFO  L328         TraceCheckSpWp]: Computing backward predicates...