/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/prod4br-ll_valuebound20.c


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


This is Ultimate 0.2.2-dev-a10ec3b
[2022-01-10 03:26:37,025 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2022-01-10 03:26:37,027 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2022-01-10 03:26:37,110 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2022-01-10 03:26:37,110 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2022-01-10 03:26:37,111 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2022-01-10 03:26:37,112 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
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[2022-01-10 03:26:37,115 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2022-01-10 03:26:37,115 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
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[2022-01-10 03:26:37,117 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2022-01-10 03:26:37,117 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2022-01-10 03:26:37,118 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2022-01-10 03:26:37,119 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2022-01-10 03:26:37,120 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2022-01-10 03:26:37,121 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2022-01-10 03:26:37,121 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2022-01-10 03:26:37,123 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2022-01-10 03:26:37,130 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2022-01-10 03:26:37,131 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2022-01-10 03:26:37,133 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2022-01-10 03:26:37,134 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2022-01-10 03:26:37,135 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2022-01-10 03:26:37,137 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2022-01-10 03:26:37,137 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2022-01-10 03:26:37,137 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2022-01-10 03:26:37,138 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2022-01-10 03:26:37,138 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2022-01-10 03:26:37,139 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2022-01-10 03:26:37,139 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2022-01-10 03:26:37,140 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2022-01-10 03:26:37,140 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2022-01-10 03:26:37,141 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2022-01-10 03:26:37,142 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2022-01-10 03:26:37,142 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2022-01-10 03:26:37,142 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2022-01-10 03:26:37,142 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2022-01-10 03:26:37,143 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2022-01-10 03:26:37,143 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2022-01-10 03:26:37,144 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2022-01-10 03:26:37,145 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 03:26:37,179 INFO  L113        SettingsManager]: Loading preferences was successful
[2022-01-10 03:26:37,179 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2022-01-10 03:26:37,180 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2022-01-10 03:26:37,180 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2022-01-10 03:26:37,180 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2022-01-10 03:26:37,181 INFO  L138        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2022-01-10 03:26:37,181 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2022-01-10 03:26:37,181 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2022-01-10 03:26:37,181 INFO  L138        SettingsManager]:  * Use SBE=true
[2022-01-10 03:26:37,182 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2022-01-10 03:26:37,182 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2022-01-10 03:26:37,182 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2022-01-10 03:26:37,182 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2022-01-10 03:26:37,182 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2022-01-10 03:26:37,182 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2022-01-10 03:26:37,182 INFO  L138        SettingsManager]:  * Adapt memory model on pointer casts if necessary=true
[2022-01-10 03:26:37,183 INFO  L138        SettingsManager]:  * Use bitvectors instead of ints=true
[2022-01-10 03:26:37,183 INFO  L138        SettingsManager]:  * Memory model=HoenickeLindenmann_4ByteResolution
[2022-01-10 03:26:37,183 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2022-01-10 03:26:37,183 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2022-01-10 03:26:37,183 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2022-01-10 03:26:37,183 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2022-01-10 03:26:37,183 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2022-01-10 03:26:37,183 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-01-10 03:26:37,184 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2022-01-10 03:26:37,184 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2022-01-10 03:26:37,184 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2022-01-10 03:26:37,184 INFO  L138        SettingsManager]:  * Trace refinement strategy=WOLF
[2022-01-10 03:26:37,184 INFO  L138        SettingsManager]:  * Command for external solver=cvc4 --incremental --print-success --lang smt 
[2022-01-10 03:26:37,184 INFO  L138        SettingsManager]:  * Large block encoding in concurrent analysis=OFF
[2022-01-10 03:26:37,184 INFO  L138        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2022-01-10 03:26:37,185 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2022-01-10 03:26:37,185 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2022-01-10 03:26:37,185 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN;
[2022-01-10 03:26:37,399 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2022-01-10 03:26:37,420 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2022-01-10 03:26:37,422 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2022-01-10 03:26:37,423 INFO  L271        PluginConnector]: Initializing CDTParser...
[2022-01-10 03:26:37,425 INFO  L275        PluginConnector]: CDTParser initialized
[2022-01-10 03:26:37,425 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_valuebound20.c
[2022-01-10 03:26:37,479 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95a9d2c1a/d35d975a10fb4b58b70b6ff90ff1acdb/FLAGac5c28785
[2022-01-10 03:26:37,882 INFO  L306              CDTParser]: Found 1 translation units.
[2022-01-10 03:26:37,883 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_valuebound20.c
[2022-01-10 03:26:37,893 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95a9d2c1a/d35d975a10fb4b58b70b6ff90ff1acdb/FLAGac5c28785
[2022-01-10 03:26:37,906 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95a9d2c1a/d35d975a10fb4b58b70b6ff90ff1acdb
[2022-01-10 03:26:37,908 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2022-01-10 03:26:37,912 INFO  L131        ToolchainWalker]: Walking toolchain with 5 elements.
[2022-01-10 03:26:37,915 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2022-01-10 03:26:37,915 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2022-01-10 03:26:37,918 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2022-01-10 03:26:37,918 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 03:26:37" (1/1) ...
[2022-01-10 03:26:37,919 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ccfd40d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:26:37, skipping insertion in model container
[2022-01-10 03:26:37,920 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 03:26:37" (1/1) ...
[2022-01-10 03:26:37,925 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2022-01-10 03:26:37,946 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2022-01-10 03:26:38,139 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/prod4br-ll_valuebound20.c[524,537]
[2022-01-10 03:26:38,186 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-01-10 03:26:38,196 INFO  L203         MainTranslator]: Completed pre-run
[2022-01-10 03:26:38,209 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/prod4br-ll_valuebound20.c[524,537]
[2022-01-10 03:26:38,228 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-01-10 03:26:38,240 INFO  L208         MainTranslator]: Completed translation
[2022-01-10 03:26:38,241 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:26:38 WrapperNode
[2022-01-10 03:26:38,241 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2022-01-10 03:26:38,244 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2022-01-10 03:26:38,244 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2022-01-10 03:26:38,244 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2022-01-10 03:26:38,250 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:26:38" (1/1) ...
[2022-01-10 03:26:38,257 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:26:38" (1/1) ...
[2022-01-10 03:26:38,273 INFO  L137                Inliner]: procedures = 14, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 51
[2022-01-10 03:26:38,274 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2022-01-10 03:26:38,274 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2022-01-10 03:26:38,274 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2022-01-10 03:26:38,275 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2022-01-10 03:26:38,280 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:26:38" (1/1) ...
[2022-01-10 03:26:38,281 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:26:38" (1/1) ...
[2022-01-10 03:26:38,291 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:26:38" (1/1) ...
[2022-01-10 03:26:38,291 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:26:38" (1/1) ...
[2022-01-10 03:26:38,301 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:26:38" (1/1) ...
[2022-01-10 03:26:38,304 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:26:38" (1/1) ...
[2022-01-10 03:26:38,304 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:26:38" (1/1) ...
[2022-01-10 03:26:38,306 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2022-01-10 03:26:38,307 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2022-01-10 03:26:38,307 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2022-01-10 03:26:38,307 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2022-01-10 03:26:38,314 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:26:38" (1/1) ...
[2022-01-10 03:26:38,320 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-01-10 03:26:38,328 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-10 03:26:38,337 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 03:26:38,339 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 03:26:38,363 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2022-01-10 03:26:38,363 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1
[2022-01-10 03:26:38,363 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2022-01-10 03:26:38,363 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2022-01-10 03:26:38,363 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2022-01-10 03:26:38,363 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2022-01-10 03:26:38,363 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2022-01-10 03:26:38,363 INFO  L138     BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2022-01-10 03:26:38,417 INFO  L234             CfgBuilder]: Building ICFG
[2022-01-10 03:26:38,418 INFO  L260             CfgBuilder]: Building CFG for each procedure with an implementation
[2022-01-10 03:26:39,268 INFO  L275             CfgBuilder]: Performing block encoding
[2022-01-10 03:26:39,273 INFO  L294             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2022-01-10 03:26:39,273 INFO  L299             CfgBuilder]: Removed 1 assume(true) statements.
[2022-01-10 03:26:39,274 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 03:26:39 BoogieIcfgContainer
[2022-01-10 03:26:39,274 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2022-01-10 03:26:39,276 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2022-01-10 03:26:39,276 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2022-01-10 03:26:39,293 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2022-01-10 03:26:39,294 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 03:26:37" (1/3) ...
[2022-01-10 03:26:39,294 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b22dd1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 03:26:39, skipping insertion in model container
[2022-01-10 03:26:39,294 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:26:38" (2/3) ...
[2022-01-10 03:26:39,295 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b22dd1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 03:26:39, skipping insertion in model container
[2022-01-10 03:26:39,295 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 03:26:39" (3/3) ...
[2022-01-10 03:26:39,296 INFO  L111   eAbstractionObserver]: Analyzing ICFG prod4br-ll_valuebound20.c
[2022-01-10 03:26:39,300 INFO  L204   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2022-01-10 03:26:39,300 INFO  L163   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2022-01-10 03:26:39,340 INFO  L338      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2022-01-10 03:26:39,347 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 03:26:39,348 INFO  L340      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2022-01-10 03:26:39,362 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 29 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 20 states have internal predecessors, (28), 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 03:26:39,366 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 25
[2022-01-10 03:26:39,366 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 03:26:39,367 INFO  L514         BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 03:26:39,367 INFO  L402      AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 03:26:39,371 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 03:26:39,371 INFO  L85        PathProgramCache]: Analyzing trace with hash 1472905330, now seen corresponding path program 1 times
[2022-01-10 03:26:39,381 INFO  L121   FreeRefinementEngine]: Executing refinement strategy WOLF
[2022-01-10 03:26:39,382 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1682106895]
[2022-01-10 03:26:39,382 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 03:26:39,383 INFO  L168          SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3
[2022-01-10 03:26:39,383 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat
[2022-01-10 03:26:39,385 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 03:26:39,386 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 03:26:39,533 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 03:26:39,550 INFO  L263         TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 1 conjunts are in the unsatisfiable core
[2022-01-10 03:26:39,554 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 03:26:39,646 INFO  L134       CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2022-01-10 03:26:39,646 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2022-01-10 03:26:39,647 INFO  L139   FreeRefinementEngine]: Strategy WOLF found an infeasible trace
[2022-01-10 03:26:39,647 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1682106895]
[2022-01-10 03:26:39,648 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleMathsat [1682106895] provided 1 perfect and 0 imperfect interpolant sequences
[2022-01-10 03:26:39,648 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-01-10 03:26:39,648 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2022-01-10 03:26:39,650 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414627892]
[2022-01-10 03:26:39,651 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-10 03:26:39,654 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 2 states
[2022-01-10 03:26:39,655 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF
[2022-01-10 03:26:39,684 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2022-01-10 03:26:39,685 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2022-01-10 03:26:39,687 INFO  L87              Difference]: Start difference. First operand  has 29 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 20 states have internal predecessors, (28), 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 7.5) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3)
[2022-01-10 03:26:39,708 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 03:26:39,708 INFO  L93              Difference]: Finished difference Result 55 states and 82 transitions.
[2022-01-10 03:26:39,709 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. 
[2022-01-10 03:26:39,710 INFO  L78                 Accepts]: Start accepts. Automaton has  has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24
[2022-01-10 03:26:39,711 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 03:26:39,716 INFO  L225             Difference]: With dead ends: 55
[2022-01-10 03:26:39,716 INFO  L226             Difference]: Without dead ends: 25
[2022-01-10 03:26:39,722 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 23 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 03:26:39,725 INFO  L933         BasicCegarLoop]: 36 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, 36 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 03:26:39,726 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-01-10 03:26:39,739 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 25 states.
[2022-01-10 03:26:39,756 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25.
[2022-01-10 03:26:39,757 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 25 states, 16 states have (on average 1.3125) internal successors, (21), 17 states have internal predecessors, (21), 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 03:26:39,758 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions.
[2022-01-10 03:26:39,759 INFO  L78                 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 24
[2022-01-10 03:26:39,759 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 03:26:39,759 INFO  L470      AbstractCegarLoop]: Abstraction has 25 states and 32 transitions.
[2022-01-10 03:26:39,760 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3)
[2022-01-10 03:26:39,760 INFO  L276                IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions.
[2022-01-10 03:26:39,761 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 25
[2022-01-10 03:26:39,761 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 03:26:39,761 INFO  L514         BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 03:26:39,777 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 03:26:39,974 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 03:26:39,975 INFO  L402      AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 03:26:39,975 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 03:26:39,975 INFO  L85        PathProgramCache]: Analyzing trace with hash 324198000, now seen corresponding path program 1 times
[2022-01-10 03:26:39,976 INFO  L121   FreeRefinementEngine]: Executing refinement strategy WOLF
[2022-01-10 03:26:39,976 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [526358125]
[2022-01-10 03:26:39,976 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 03:26:39,977 INFO  L168          SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3
[2022-01-10 03:26:39,977 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat
[2022-01-10 03:26:39,978 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 03:26:39,980 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 03:26:40,098 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 03:26:40,112 INFO  L263         TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 13 conjunts are in the unsatisfiable core
[2022-01-10 03:26:40,115 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 03:26:40,459 INFO  L134       CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2022-01-10 03:26:40,459 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-01-10 03:26:47,208 INFO  L134       CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked.
[2022-01-10 03:26:47,209 INFO  L139   FreeRefinementEngine]: Strategy WOLF found an infeasible trace
[2022-01-10 03:26:47,209 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [526358125]
[2022-01-10 03:26:47,209 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleMathsat [526358125] provided 1 perfect and 1 imperfect interpolant sequences
[2022-01-10 03:26:47,209 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2022-01-10 03:26:47,209 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12
[2022-01-10 03:26:47,209 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158989053]
[2022-01-10 03:26:47,210 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-10 03:26:47,211 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2022-01-10 03:26:47,211 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF
[2022-01-10 03:26:47,211 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2022-01-10 03:26:47,212 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132
[2022-01-10 03:26:47,212 INFO  L87              Difference]: Start difference. First operand 25 states and 32 transitions. Second operand  has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3)
[2022-01-10 03:26:53,162 WARN  L534   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers []
[2022-01-10 03:26:57,022 WARN  L534   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers []
[2022-01-10 03:27:00,322 WARN  L534   Checker$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 03:27:03,105 WARN  L534   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers []
[2022-01-10 03:27:06,239 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 03:27:06,240 INFO  L93              Difference]: Finished difference Result 39 states and 51 transitions.
[2022-01-10 03:27:06,267 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2022-01-10 03:27:06,268 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24
[2022-01-10 03:27:06,268 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 03:27:06,269 INFO  L225             Difference]: With dead ends: 39
[2022-01-10 03:27:06,269 INFO  L226             Difference]: Without dead ends: 37
[2022-01-10 03:27:06,270 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156
[2022-01-10 03:27:06,271 INFO  L933         BasicCegarLoop]: 23 mSDtfsCounter, 10 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.6s IncrementalHoareTripleChecker+Time
[2022-01-10 03:27:06,271 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 84 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 4 Unknown, 0 Unchecked, 18.6s Time]
[2022-01-10 03:27:06,272 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 37 states.
[2022-01-10 03:27:06,277 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 31.
[2022-01-10 03:27:06,278 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 31 states, 20 states have (on average 1.25) internal successors, (25), 22 states have internal predecessors, (25), 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 03:27:06,279 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions.
[2022-01-10 03:27:06,279 INFO  L78                 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 24
[2022-01-10 03:27:06,279 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 03:27:06,279 INFO  L470      AbstractCegarLoop]: Abstraction has 31 states and 38 transitions.
[2022-01-10 03:27:06,279 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3)
[2022-01-10 03:27:06,280 INFO  L276                IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions.
[2022-01-10 03:27:06,280 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 31
[2022-01-10 03:27:06,280 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 03:27:06,281 INFO  L514         BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 03:27:06,295 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 03:27:06,492 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 03:27:06,492 INFO  L402      AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 03:27:06,493 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 03:27:06,493 INFO  L85        PathProgramCache]: Analyzing trace with hash 693549193, now seen corresponding path program 1 times
[2022-01-10 03:27:06,493 INFO  L121   FreeRefinementEngine]: Executing refinement strategy WOLF
[2022-01-10 03:27:06,494 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1803561032]
[2022-01-10 03:27:06,494 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 03:27:06,494 INFO  L168          SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3
[2022-01-10 03:27:06,494 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat
[2022-01-10 03:27:06,495 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 03:27:06,501 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 03:27:06,621 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 03:27:06,634 INFO  L263         TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core
[2022-01-10 03:27:06,636 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 03:27:08,008 INFO  L134       CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked.
[2022-01-10 03:27:08,009 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2022-01-10 03:27:08,009 INFO  L139   FreeRefinementEngine]: Strategy WOLF found an infeasible trace
[2022-01-10 03:27:08,009 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1803561032]
[2022-01-10 03:27:08,009 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleMathsat [1803561032] provided 1 perfect and 0 imperfect interpolant sequences
[2022-01-10 03:27:08,009 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-01-10 03:27:08,009 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11
[2022-01-10 03:27:08,010 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983553931]
[2022-01-10 03:27:08,010 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-10 03:27:08,010 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 11 states
[2022-01-10 03:27:08,010 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF
[2022-01-10 03:27:08,011 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2022-01-10 03:27:08,011 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110
[2022-01-10 03:27:08,011 INFO  L87              Difference]: Start difference. First operand 31 states and 38 transitions. Second operand  has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4)
[2022-01-10 03:27:09,991 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 03:27:09,991 INFO  L93              Difference]: Finished difference Result 43 states and 54 transitions.
[2022-01-10 03:27:10,000 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. 
[2022-01-10 03:27:10,000 INFO  L78                 Accepts]: Start accepts. Automaton has  has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 30
[2022-01-10 03:27:10,001 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 03:27:10,001 INFO  L225             Difference]: With dead ends: 43
[2022-01-10 03:27:10,001 INFO  L226             Difference]: Without dead ends: 35
[2022-01-10 03:27:10,002 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182
[2022-01-10 03:27:10,003 INFO  L933         BasicCegarLoop]: 21 mSDtfsCounter, 37 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time
[2022-01-10 03:27:10,003 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 119 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time]
[2022-01-10 03:27:10,004 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 35 states.
[2022-01-10 03:27:10,010 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32.
[2022-01-10 03:27:10,010 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 32 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 22 states have internal predecessors, (26), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6)
[2022-01-10 03:27:10,011 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions.
[2022-01-10 03:27:10,011 INFO  L78                 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 30
[2022-01-10 03:27:10,011 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 03:27:10,011 INFO  L470      AbstractCegarLoop]: Abstraction has 32 states and 39 transitions.
[2022-01-10 03:27:10,011 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4)
[2022-01-10 03:27:10,011 INFO  L276                IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions.
[2022-01-10 03:27:10,012 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 33
[2022-01-10 03:27:10,012 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 03:27:10,012 INFO  L514         BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 03:27:10,023 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0
[2022-01-10 03:27:10,216 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 03:27:10,217 INFO  L402      AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 03:27:10,217 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 03:27:10,217 INFO  L85        PathProgramCache]: Analyzing trace with hash 1087866724, now seen corresponding path program 1 times
[2022-01-10 03:27:10,218 INFO  L121   FreeRefinementEngine]: Executing refinement strategy WOLF
[2022-01-10 03:27:10,218 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1311182602]
[2022-01-10 03:27:10,218 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 03:27:10,218 INFO  L168          SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3
[2022-01-10 03:27:10,218 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat
[2022-01-10 03:27:10,219 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 03:27:10,220 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 03:27:10,394 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 03:27:10,415 INFO  L263         TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 23 conjunts are in the unsatisfiable core
[2022-01-10 03:27:10,417 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 03:27:25,404 INFO  L134       CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked.
[2022-01-10 03:27:25,404 INFO  L328         TraceCheckSpWp]: Computing backward predicates...