/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/fermat2-ll_valuebound10.c


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


This is Ultimate 0.2.2-dev-a10ec3b
[2022-01-10 03:12:49,857 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2022-01-10 03:12:49,858 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2022-01-10 03:12:49,921 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2022-01-10 03:12:49,922 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2022-01-10 03:12:49,923 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2022-01-10 03:12:49,924 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2022-01-10 03:12:49,925 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2022-01-10 03:12:49,926 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2022-01-10 03:12:49,927 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
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[2022-01-10 03:12:49,936 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2022-01-10 03:12:49,936 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2022-01-10 03:12:49,941 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2022-01-10 03:12:49,942 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2022-01-10 03:12:49,944 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2022-01-10 03:12:49,944 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2022-01-10 03:12:49,946 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2022-01-10 03:12:49,950 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2022-01-10 03:12:49,952 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2022-01-10 03:12:49,953 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2022-01-10 03:12:49,956 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2022-01-10 03:12:49,958 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2022-01-10 03:12:49,959 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2022-01-10 03:12:49,968 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2022-01-10 03:12:49,968 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2022-01-10 03:12:49,969 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2022-01-10 03:12:49,969 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2022-01-10 03:12:49,970 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2022-01-10 03:12:49,970 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2022-01-10 03:12:49,971 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2022-01-10 03:12:49,971 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2022-01-10 03:12:49,972 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2022-01-10 03:12:49,972 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2022-01-10 03:12:49,973 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2022-01-10 03:12:49,973 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2022-01-10 03:12:49,974 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2022-01-10 03:12:49,974 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2022-01-10 03:12:49,974 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2022-01-10 03:12:49,975 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2022-01-10 03:12:49,975 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2022-01-10 03:12:49,979 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 03:12:50,012 INFO  L113        SettingsManager]: Loading preferences was successful
[2022-01-10 03:12:50,013 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2022-01-10 03:12:50,013 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2022-01-10 03:12:50,013 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2022-01-10 03:12:50,014 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2022-01-10 03:12:50,014 INFO  L138        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2022-01-10 03:12:50,015 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2022-01-10 03:12:50,015 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2022-01-10 03:12:50,015 INFO  L138        SettingsManager]:  * Use SBE=true
[2022-01-10 03:12:50,015 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2022-01-10 03:12:50,016 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2022-01-10 03:12:50,016 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2022-01-10 03:12:50,016 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2022-01-10 03:12:50,016 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2022-01-10 03:12:50,016 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2022-01-10 03:12:50,017 INFO  L138        SettingsManager]:  * Adapt memory model on pointer casts if necessary=true
[2022-01-10 03:12:50,017 INFO  L138        SettingsManager]:  * Use bitvectors instead of ints=true
[2022-01-10 03:12:50,017 INFO  L138        SettingsManager]:  * Memory model=HoenickeLindenmann_4ByteResolution
[2022-01-10 03:12:50,017 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2022-01-10 03:12:50,017 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2022-01-10 03:12:50,017 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2022-01-10 03:12:50,017 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2022-01-10 03:12:50,017 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2022-01-10 03:12:50,017 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-01-10 03:12:50,018 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2022-01-10 03:12:50,018 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2022-01-10 03:12:50,018 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2022-01-10 03:12:50,018 INFO  L138        SettingsManager]:  * Trace refinement strategy=WOLF
[2022-01-10 03:12:50,018 INFO  L138        SettingsManager]:  * Command for external solver=cvc4 --incremental --print-success --lang smt 
[2022-01-10 03:12:50,018 INFO  L138        SettingsManager]:  * Large block encoding in concurrent analysis=OFF
[2022-01-10 03:12:50,018 INFO  L138        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2022-01-10 03:12:50,018 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2022-01-10 03:12:50,019 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2022-01-10 03:12:50,019 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN;
[2022-01-10 03:12:50,243 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2022-01-10 03:12:50,261 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2022-01-10 03:12:50,263 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2022-01-10 03:12:50,264 INFO  L271        PluginConnector]: Initializing CDTParser...
[2022-01-10 03:12:50,264 INFO  L275        PluginConnector]: CDTParser initialized
[2022-01-10 03:12:50,265 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_valuebound10.c
[2022-01-10 03:12:50,319 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/071f0cd4e/937bbcea966e4c08b14d4414eab975b8/FLAG171a4d2ae
[2022-01-10 03:12:50,758 INFO  L306              CDTParser]: Found 1 translation units.
[2022-01-10 03:12:50,758 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_valuebound10.c
[2022-01-10 03:12:50,767 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/071f0cd4e/937bbcea966e4c08b14d4414eab975b8/FLAG171a4d2ae
[2022-01-10 03:12:51,146 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/071f0cd4e/937bbcea966e4c08b14d4414eab975b8
[2022-01-10 03:12:51,149 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2022-01-10 03:12:51,152 INFO  L131        ToolchainWalker]: Walking toolchain with 5 elements.
[2022-01-10 03:12:51,155 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2022-01-10 03:12:51,155 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2022-01-10 03:12:51,158 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2022-01-10 03:12:51,159 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 03:12:51" (1/1) ...
[2022-01-10 03:12:51,161 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54532827 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:12:51, skipping insertion in model container
[2022-01-10 03:12:51,161 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 03:12:51" (1/1) ...
[2022-01-10 03:12:51,167 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2022-01-10 03:12:51,182 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2022-01-10 03:12:51,333 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/fermat2-ll_valuebound10.c[524,537]
[2022-01-10 03:12:51,373 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-01-10 03:12:51,382 INFO  L203         MainTranslator]: Completed pre-run
[2022-01-10 03:12:51,391 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/fermat2-ll_valuebound10.c[524,537]
[2022-01-10 03:12:51,398 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-01-10 03:12:51,410 INFO  L208         MainTranslator]: Completed translation
[2022-01-10 03:12:51,410 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:12:51 WrapperNode
[2022-01-10 03:12:51,410 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2022-01-10 03:12:51,413 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2022-01-10 03:12:51,413 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2022-01-10 03:12:51,413 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2022-01-10 03:12:51,418 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:12:51" (1/1) ...
[2022-01-10 03:12:51,426 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:12:51" (1/1) ...
[2022-01-10 03:12:51,445 INFO  L137                Inliner]: procedures = 14, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 41
[2022-01-10 03:12:51,445 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2022-01-10 03:12:51,446 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2022-01-10 03:12:51,446 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2022-01-10 03:12:51,446 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2022-01-10 03:12:51,453 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:12:51" (1/1) ...
[2022-01-10 03:12:51,453 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:12:51" (1/1) ...
[2022-01-10 03:12:51,466 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:12:51" (1/1) ...
[2022-01-10 03:12:51,466 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:12:51" (1/1) ...
[2022-01-10 03:12:51,470 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:12:51" (1/1) ...
[2022-01-10 03:12:51,474 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:12:51" (1/1) ...
[2022-01-10 03:12:51,479 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:12:51" (1/1) ...
[2022-01-10 03:12:51,482 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2022-01-10 03:12:51,482 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2022-01-10 03:12:51,482 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2022-01-10 03:12:51,483 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2022-01-10 03:12:51,487 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:12:51" (1/1) ...
[2022-01-10 03:12:51,494 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-01-10 03:12:51,504 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-10 03:12:51,515 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 03:12:51,517 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 03:12:51,548 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2022-01-10 03:12:51,548 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1
[2022-01-10 03:12:51,548 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2022-01-10 03:12:51,549 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2022-01-10 03:12:51,549 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2022-01-10 03:12:51,549 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2022-01-10 03:12:51,549 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2022-01-10 03:12:51,552 INFO  L138     BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2022-01-10 03:12:51,613 INFO  L234             CfgBuilder]: Building ICFG
[2022-01-10 03:12:51,615 INFO  L260             CfgBuilder]: Building CFG for each procedure with an implementation
[2022-01-10 03:12:51,881 INFO  L275             CfgBuilder]: Performing block encoding
[2022-01-10 03:12:51,900 INFO  L294             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2022-01-10 03:12:51,900 INFO  L299             CfgBuilder]: Removed 1 assume(true) statements.
[2022-01-10 03:12:51,902 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 03:12:51 BoogieIcfgContainer
[2022-01-10 03:12:51,902 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2022-01-10 03:12:51,904 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2022-01-10 03:12:51,904 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2022-01-10 03:12:51,907 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2022-01-10 03:12:51,911 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 03:12:51" (1/3) ...
[2022-01-10 03:12:51,913 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cf77200 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 03:12:51, skipping insertion in model container
[2022-01-10 03:12:51,913 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:12:51" (2/3) ...
[2022-01-10 03:12:51,913 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cf77200 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 03:12:51, skipping insertion in model container
[2022-01-10 03:12:51,913 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 03:12:51" (3/3) ...
[2022-01-10 03:12:51,914 INFO  L111   eAbstractionObserver]: Analyzing ICFG fermat2-ll_valuebound10.c
[2022-01-10 03:12:51,918 INFO  L204   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2022-01-10 03:12:51,919 INFO  L163   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2022-01-10 03:12:51,975 INFO  L338      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2022-01-10 03:12:51,982 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 03:12:51,983 INFO  L340      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2022-01-10 03:12:51,998 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 27 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6)
[2022-01-10 03:12:52,002 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 30
[2022-01-10 03:12:52,002 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 03:12:52,003 INFO  L514         BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 03:12:52,004 INFO  L402      AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 03:12:52,008 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 03:12:52,008 INFO  L85        PathProgramCache]: Analyzing trace with hash 970763787, now seen corresponding path program 1 times
[2022-01-10 03:12:52,018 INFO  L121   FreeRefinementEngine]: Executing refinement strategy WOLF
[2022-01-10 03:12:52,019 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [100949714]
[2022-01-10 03:12:52,019 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 03:12:52,020 INFO  L168          SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3
[2022-01-10 03:12:52,020 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat
[2022-01-10 03:12:52,022 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 03:12:52,030 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 03:12:52,201 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 03:12:52,222 INFO  L263         TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 1 conjunts are in the unsatisfiable core
[2022-01-10 03:12:52,227 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 03:12:52,346 INFO  L134       CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked.
[2022-01-10 03:12:52,347 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2022-01-10 03:12:52,347 INFO  L139   FreeRefinementEngine]: Strategy WOLF found an infeasible trace
[2022-01-10 03:12:52,348 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [100949714]
[2022-01-10 03:12:52,349 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleMathsat [100949714] provided 1 perfect and 0 imperfect interpolant sequences
[2022-01-10 03:12:52,349 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-01-10 03:12:52,349 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2022-01-10 03:12:52,351 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848153137]
[2022-01-10 03:12:52,351 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-10 03:12:52,355 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 2 states
[2022-01-10 03:12:52,356 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF
[2022-01-10 03:12:52,388 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2022-01-10 03:12:52,389 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2022-01-10 03:12:52,391 INFO  L87              Difference]: Start difference. First operand  has 27 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4)
[2022-01-10 03:12:52,412 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 03:12:52,413 INFO  L93              Difference]: Finished difference Result 51 states and 74 transitions.
[2022-01-10 03:12:52,418 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. 
[2022-01-10 03:12:52,420 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29
[2022-01-10 03:12:52,420 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 03:12:52,427 INFO  L225             Difference]: With dead ends: 51
[2022-01-10 03:12:52,427 INFO  L226             Difference]: Without dead ends: 23
[2022-01-10 03:12:52,432 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 28 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 03:12:52,435 INFO  L933         BasicCegarLoop]: 32 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, 32 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 03:12:52,437 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-01-10 03:12:52,452 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 23 states.
[2022-01-10 03:12:52,475 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23.
[2022-01-10 03:12:52,476 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 23 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5)
[2022-01-10 03:12:52,477 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions.
[2022-01-10 03:12:52,478 INFO  L78                 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 29
[2022-01-10 03:12:52,479 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 03:12:52,479 INFO  L470      AbstractCegarLoop]: Abstraction has 23 states and 28 transitions.
[2022-01-10 03:12:52,480 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4)
[2022-01-10 03:12:52,480 INFO  L276                IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions.
[2022-01-10 03:12:52,482 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 30
[2022-01-10 03:12:52,482 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 03:12:52,482 INFO  L514         BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 03:12:52,506 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 03:12:52,687 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 03:12:52,688 INFO  L402      AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 03:12:52,689 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 03:12:52,689 INFO  L85        PathProgramCache]: Analyzing trace with hash -908690225, now seen corresponding path program 1 times
[2022-01-10 03:12:52,690 INFO  L121   FreeRefinementEngine]: Executing refinement strategy WOLF
[2022-01-10 03:12:52,690 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [446284683]
[2022-01-10 03:12:52,690 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 03:12:52,690 INFO  L168          SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3
[2022-01-10 03:12:52,691 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat
[2022-01-10 03:12:52,692 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 03:12:52,693 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 03:12:52,867 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 03:12:52,889 INFO  L263         TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 18 conjunts are in the unsatisfiable core
[2022-01-10 03:12:52,894 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 03:13:28,914 INFO  L134       CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked.
[2022-01-10 03:13:28,915 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2022-01-10 03:13:28,915 INFO  L139   FreeRefinementEngine]: Strategy WOLF found an infeasible trace
[2022-01-10 03:13:28,915 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [446284683]
[2022-01-10 03:13:28,915 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleMathsat [446284683] provided 1 perfect and 0 imperfect interpolant sequences
[2022-01-10 03:13:28,916 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-01-10 03:13:28,916 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11
[2022-01-10 03:13:28,916 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532724606]
[2022-01-10 03:13:28,916 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-10 03:13:28,917 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 11 states
[2022-01-10 03:13:28,917 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF
[2022-01-10 03:13:28,918 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2022-01-10 03:13:28,918 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=84, Unknown=2, NotChecked=0, Total=110
[2022-01-10 03:13:28,918 INFO  L87              Difference]: Start difference. First operand 23 states and 28 transitions. Second operand  has 11 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 7 states have internal predecessors, (11), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4)
[2022-01-10 03:13:33,290 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 03:13:34,757 WARN  L534   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers []
[2022-01-10 03:13:45,641 WARN  L228               SmtUtils]: Spent 9.16s on a formula simplification. DAG size of input: 34 DAG size of output: 32 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)
[2022-01-10 03:13:45,727 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 03:13:45,727 INFO  L93              Difference]: Finished difference Result 31 states and 36 transitions.
[2022-01-10 03:13:45,727 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. 
[2022-01-10 03:13:45,727 INFO  L78                 Accepts]: Start accepts. Automaton has  has 11 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 7 states have internal predecessors, (11), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 29
[2022-01-10 03:13:45,728 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 03:13:45,729 INFO  L225             Difference]: With dead ends: 31
[2022-01-10 03:13:45,729 INFO  L226             Difference]: Without dead ends: 29
[2022-01-10 03:13:45,730 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 26.5s TimeCoverageRelationStatistics Valid=35, Invalid=119, Unknown=2, NotChecked=0, Total=156
[2022-01-10 03:13:45,731 INFO  L933         BasicCegarLoop]: 21 mSDtfsCounter, 9 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time
[2022-01-10 03:13:45,731 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 160 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 1 Unknown, 25 Unchecked, 4.2s Time]
[2022-01-10 03:13:45,732 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 29 states.
[2022-01-10 03:13:45,738 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29.
[2022-01-10 03:13:45,738 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 29 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 20 states have internal predecessors, (21), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6)
[2022-01-10 03:13:45,739 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions.
[2022-01-10 03:13:45,739 INFO  L78                 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 29
[2022-01-10 03:13:45,740 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 03:13:45,740 INFO  L470      AbstractCegarLoop]: Abstraction has 29 states and 34 transitions.
[2022-01-10 03:13:45,741 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 11 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 7 states have internal predecessors, (11), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4)
[2022-01-10 03:13:45,741 INFO  L276                IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions.
[2022-01-10 03:13:45,742 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 36
[2022-01-10 03:13:45,742 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 03:13:45,742 INFO  L514         BasicCegarLoop]: trace histogram [4, 4, 4, 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 03:13:45,755 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0
[2022-01-10 03:13:45,955 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 03:13:45,956 INFO  L402      AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 03:13:45,957 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 03:13:45,957 INFO  L85        PathProgramCache]: Analyzing trace with hash 1577016431, now seen corresponding path program 1 times
[2022-01-10 03:13:45,957 INFO  L121   FreeRefinementEngine]: Executing refinement strategy WOLF
[2022-01-10 03:13:45,957 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [231848695]
[2022-01-10 03:13:45,958 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 03:13:45,958 INFO  L168          SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3
[2022-01-10 03:13:45,958 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat
[2022-01-10 03:13:45,959 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 03:13:45,961 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 03:13:46,079 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 03:13:46,095 INFO  L263         TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 19 conjunts are in the unsatisfiable core
[2022-01-10 03:13:46,097 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 03:13:54,153 INFO  L134       CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked.
[2022-01-10 03:13:54,153 INFO  L328         TraceCheckSpWp]: Computing backward predicates...