./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-industry-pattern/aiob_4.c.v+lhb-reducer.c --full-output --architecture 32bit


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


Checking for ERROR reachability
Using default analysis
Version e19ca921
Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loop-industry-pattern/aiob_4.c.v+lhb-reducer.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) )

 --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash de5a591efb40e891e226106d8590a7409596f3a27aca8b697af826abd4fe5201
--- Real Ultimate output ---
This is Ultimate 0.2.2-dev-e19ca92
[2021-12-22 10:41:40,176 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2021-12-22 10:41:40,177 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2021-12-22 10:41:40,201 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2021-12-22 10:41:40,204 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2021-12-22 10:41:40,206 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2021-12-22 10:41:40,208 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2021-12-22 10:41:40,211 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2021-12-22 10:41:40,213 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2021-12-22 10:41:40,216 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2021-12-22 10:41:40,217 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2021-12-22 10:41:40,218 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2021-12-22 10:41:40,218 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2021-12-22 10:41:40,220 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2021-12-22 10:41:40,221 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2021-12-22 10:41:40,222 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2021-12-22 10:41:40,223 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2021-12-22 10:41:40,224 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2021-12-22 10:41:40,226 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2021-12-22 10:41:40,230 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2021-12-22 10:41:40,231 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2021-12-22 10:41:40,232 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2021-12-22 10:41:40,233 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2021-12-22 10:41:40,234 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2021-12-22 10:41:40,238 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2021-12-22 10:41:40,239 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2021-12-22 10:41:40,239 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2021-12-22 10:41:40,240 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2021-12-22 10:41:40,240 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2021-12-22 10:41:40,241 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2021-12-22 10:41:40,241 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2021-12-22 10:41:40,242 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2021-12-22 10:41:40,243 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2021-12-22 10:41:40,244 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2021-12-22 10:41:40,245 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2021-12-22 10:41:40,245 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2021-12-22 10:41:40,246 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2021-12-22 10:41:40,246 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2021-12-22 10:41:40,246 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2021-12-22 10:41:40,246 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2021-12-22 10:41:40,247 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2021-12-22 10:41:40,247 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf
[2021-12-22 10:41:40,273 INFO  L113        SettingsManager]: Loading preferences was successful
[2021-12-22 10:41:40,274 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2021-12-22 10:41:40,274 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2021-12-22 10:41:40,274 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2021-12-22 10:41:40,275 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2021-12-22 10:41:40,275 INFO  L138        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2021-12-22 10:41:40,275 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2021-12-22 10:41:40,275 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2021-12-22 10:41:40,276 INFO  L138        SettingsManager]:  * Use SBE=true
[2021-12-22 10:41:40,276 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2021-12-22 10:41:40,276 INFO  L138        SettingsManager]:  * sizeof long=4
[2021-12-22 10:41:40,277 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2021-12-22 10:41:40,277 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2021-12-22 10:41:40,277 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2021-12-22 10:41:40,277 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2021-12-22 10:41:40,277 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2021-12-22 10:41:40,277 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2021-12-22 10:41:40,277 INFO  L138        SettingsManager]:  * sizeof long double=12
[2021-12-22 10:41:40,277 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2021-12-22 10:41:40,278 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2021-12-22 10:41:40,278 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2021-12-22 10:41:40,278 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2021-12-22 10:41:40,278 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2021-12-22 10:41:40,278 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2021-12-22 10:41:40,278 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2021-12-22 10:41:40,278 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2021-12-22 10:41:40,279 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2021-12-22 10:41:40,279 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2021-12-22 10:41:40,279 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2021-12-22 10:41:40,279 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2021-12-22 10:41:40,279 INFO  L138        SettingsManager]:  * Large block encoding in concurrent analysis=OFF
[2021-12-22 10:41:40,279 INFO  L138        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2021-12-22 10:41:40,280 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2021-12-22 10:41:40,280 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2021-12-22 10:41:40,280 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
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.plugins.generator.cacsl2boogietranslator: Entry function -> main
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) )


Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> de5a591efb40e891e226106d8590a7409596f3a27aca8b697af826abd4fe5201
[2021-12-22 10:41:40,448 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2021-12-22 10:41:40,466 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2021-12-22 10:41:40,468 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2021-12-22 10:41:40,468 INFO  L271        PluginConnector]: Initializing CDTParser...
[2021-12-22 10:41:40,471 INFO  L275        PluginConnector]: CDTParser initialized
[2021-12-22 10:41:40,472 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-industry-pattern/aiob_4.c.v+lhb-reducer.c
[2021-12-22 10:41:40,525 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b8b067ad/d2cd5b12d49e4a4aaf254a6ebc1feca0/FLAGc267f104a
[2021-12-22 10:41:40,931 INFO  L306              CDTParser]: Found 1 translation units.
[2021-12-22 10:41:40,931 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-industry-pattern/aiob_4.c.v+lhb-reducer.c
[2021-12-22 10:41:40,946 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b8b067ad/d2cd5b12d49e4a4aaf254a6ebc1feca0/FLAGc267f104a
[2021-12-22 10:41:40,954 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b8b067ad/d2cd5b12d49e4a4aaf254a6ebc1feca0
[2021-12-22 10:41:40,956 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2021-12-22 10:41:40,957 INFO  L131        ToolchainWalker]: Walking toolchain with 6 elements.
[2021-12-22 10:41:40,957 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2021-12-22 10:41:40,958 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2021-12-22 10:41:40,960 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2021-12-22 10:41:40,960 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:41:40" (1/1) ...
[2021-12-22 10:41:40,961 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b6c0820 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:41:40, skipping insertion in model container
[2021-12-22 10:41:40,961 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:41:40" (1/1) ...
[2021-12-22 10:41:40,972 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2021-12-22 10:41:41,000 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2021-12-22 10:41:41,170 WARN  L230   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-industry-pattern/aiob_4.c.v+lhb-reducer.c[15516,15529]
[2021-12-22 10:41:41,185 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2021-12-22 10:41:41,190 INFO  L203         MainTranslator]: Completed pre-run
[2021-12-22 10:41:41,237 WARN  L230   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-industry-pattern/aiob_4.c.v+lhb-reducer.c[15516,15529]
[2021-12-22 10:41:41,242 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2021-12-22 10:41:41,250 INFO  L208         MainTranslator]: Completed translation
[2021-12-22 10:41:41,250 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:41:41 WrapperNode
[2021-12-22 10:41:41,251 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2021-12-22 10:41:41,251 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2021-12-22 10:41:41,252 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2021-12-22 10:41:41,252 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2021-12-22 10:41:41,262 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:41:41" (1/1) ...
[2021-12-22 10:41:41,276 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:41:41" (1/1) ...
[2021-12-22 10:41:41,307 INFO  L137                Inliner]: procedures = 17, calls = 293, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 772
[2021-12-22 10:41:41,307 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2021-12-22 10:41:41,308 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2021-12-22 10:41:41,308 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2021-12-22 10:41:41,308 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2021-12-22 10:41:41,314 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:41:41" (1/1) ...
[2021-12-22 10:41:41,314 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:41:41" (1/1) ...
[2021-12-22 10:41:41,322 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:41:41" (1/1) ...
[2021-12-22 10:41:41,332 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:41:41" (1/1) ...
[2021-12-22 10:41:41,345 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:41:41" (1/1) ...
[2021-12-22 10:41:41,363 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:41:41" (1/1) ...
[2021-12-22 10:41:41,373 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:41:41" (1/1) ...
[2021-12-22 10:41:41,376 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2021-12-22 10:41:41,377 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2021-12-22 10:41:41,377 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2021-12-22 10:41:41,377 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2021-12-22 10:41:41,384 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:41:41" (1/1) ...
[2021-12-22 10:41:41,388 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2021-12-22 10:41:41,396 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2021-12-22 10:41:41,405 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)
[2021-12-22 10:41:41,412 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
[2021-12-22 10:41:41,442 INFO  L130     BoogieDeclarations]: Found specification of procedure read~$Pointer$
[2021-12-22 10:41:41,442 INFO  L130     BoogieDeclarations]: Found specification of procedure fopen
[2021-12-22 10:41:41,442 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2021-12-22 10:41:41,443 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2021-12-22 10:41:41,443 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2021-12-22 10:41:41,443 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2021-12-22 10:41:41,443 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2021-12-22 10:41:41,443 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2021-12-22 10:41:41,443 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2021-12-22 10:41:41,552 INFO  L234             CfgBuilder]: Building ICFG
[2021-12-22 10:41:41,553 INFO  L260             CfgBuilder]: Building CFG for each procedure with an implementation
[2021-12-22 10:41:42,061 INFO  L275             CfgBuilder]: Performing block encoding
[2021-12-22 10:41:42,067 INFO  L294             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2021-12-22 10:41:42,067 INFO  L299             CfgBuilder]: Removed 0 assume(true) statements.
[2021-12-22 10:41:42,068 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:41:42 BoogieIcfgContainer
[2021-12-22 10:41:42,068 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2021-12-22 10:41:42,070 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2021-12-22 10:41:42,070 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2021-12-22 10:41:42,072 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2021-12-22 10:41:42,073 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:41:40" (1/3) ...
[2021-12-22 10:41:42,073 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fbb3ac8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:41:42, skipping insertion in model container
[2021-12-22 10:41:42,073 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:41:41" (2/3) ...
[2021-12-22 10:41:42,073 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fbb3ac8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:41:42, skipping insertion in model container
[2021-12-22 10:41:42,073 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:41:42" (3/3) ...
[2021-12-22 10:41:42,074 INFO  L111   eAbstractionObserver]: Analyzing ICFG aiob_4.c.v+lhb-reducer.c
[2021-12-22 10:41:42,078 INFO  L204   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2021-12-22 10:41:42,078 INFO  L163   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2021-12-22 10:41:42,115 INFO  L338      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2021-12-22 10:41:42,120 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
[2021-12-22 10:41:42,121 INFO  L340      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2021-12-22 10:41:42,131 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 50 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 49 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-22 10:41:42,143 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 45
[2021-12-22 10:41:42,144 INFO  L506         BasicCegarLoop]: Found error trace
[2021-12-22 10:41:42,144 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-12-22 10:41:42,145 INFO  L402      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-12-22 10:41:42,148 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-12-22 10:41:42,148 INFO  L85        PathProgramCache]: Analyzing trace with hash -1997100867, now seen corresponding path program 1 times
[2021-12-22 10:41:42,154 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-12-22 10:41:42,154 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687462228]
[2021-12-22 10:41:42,154 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-12-22 10:41:42,154 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-12-22 10:41:42,413 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-12-22 10:41:42,733 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-12-22 10:41:42,734 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-12-22 10:41:42,734 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687462228]
[2021-12-22 10:41:42,734 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687462228] provided 1 perfect and 0 imperfect interpolant sequences
[2021-12-22 10:41:42,735 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-12-22 10:41:42,735 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16
[2021-12-22 10:41:42,737 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243229691]
[2021-12-22 10:41:42,738 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-12-22 10:41:42,740 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 16 states
[2021-12-22 10:41:42,741 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-12-22 10:41:42,762 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants.
[2021-12-22 10:41:42,764 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240
[2021-12-22 10:41:42,766 INFO  L87              Difference]: Start difference. First operand  has 50 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 49 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand  has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-22 10:41:43,189 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-12-22 10:41:43,190 INFO  L93              Difference]: Finished difference Result 95 states and 129 transitions.
[2021-12-22 10:41:43,192 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. 
[2021-12-22 10:41:43,193 INFO  L78                 Accepts]: Start accepts. Automaton has  has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44
[2021-12-22 10:41:43,193 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-12-22 10:41:43,198 INFO  L225             Difference]: With dead ends: 95
[2021-12-22 10:41:43,198 INFO  L226             Difference]: Without dead ends: 53
[2021-12-22 10:41:43,200 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506
[2021-12-22 10:41:43,202 INFO  L933         BasicCegarLoop]: 60 mSDtfsCounter, 104 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 655 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2021-12-22 10:41:43,203 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 655 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time]
[2021-12-22 10:41:43,214 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 53 states.
[2021-12-22 10:41:43,228 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50.
[2021-12-22 10:41:43,229 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 50 states, 49 states have (on average 1.0204081632653061) internal successors, (50), 49 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-22 10:41:43,231 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions.
[2021-12-22 10:41:43,232 INFO  L78                 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 44
[2021-12-22 10:41:43,232 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-12-22 10:41:43,232 INFO  L470      AbstractCegarLoop]: Abstraction has 50 states and 50 transitions.
[2021-12-22 10:41:43,233 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-22 10:41:43,233 INFO  L276                IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions.
[2021-12-22 10:41:43,234 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 50
[2021-12-22 10:41:43,234 INFO  L506         BasicCegarLoop]: Found error trace
[2021-12-22 10:41:43,234 INFO  L514         BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-12-22 10:41:43,234 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2021-12-22 10:41:43,235 INFO  L402      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-12-22 10:41:43,237 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-12-22 10:41:43,237 INFO  L85        PathProgramCache]: Analyzing trace with hash -1678604412, now seen corresponding path program 1 times
[2021-12-22 10:41:43,237 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-12-22 10:41:43,237 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146882794]
[2021-12-22 10:41:43,237 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-12-22 10:41:43,238 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-12-22 10:41:43,342 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-12-22 10:41:43,631 INFO  L134       CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-12-22 10:41:43,631 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-12-22 10:41:43,632 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146882794]
[2021-12-22 10:41:43,632 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146882794] provided 0 perfect and 1 imperfect interpolant sequences
[2021-12-22 10:41:43,632 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735464561]
[2021-12-22 10:41:43,632 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-12-22 10:41:43,633 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-12-22 10:41:43,633 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2021-12-22 10:41:43,634 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2021-12-22 10:41:43,667 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2021-12-22 10:41:43,836 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-12-22 10:41:43,854 INFO  L263         TraceCheckSpWp]: Trace formula consists of 825 conjuncts, 25 conjunts are in the unsatisfiable core
[2021-12-22 10:41:43,859 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2021-12-22 10:41:44,126 INFO  L134       CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-12-22 10:41:44,127 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2021-12-22 10:41:44,514 INFO  L134       CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-12-22 10:41:44,515 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [735464561] provided 0 perfect and 2 imperfect interpolant sequences
[2021-12-22 10:41:44,515 INFO  L186   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2021-12-22 10:41:44,515 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 14] total 30
[2021-12-22 10:41:44,515 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667233823]
[2021-12-22 10:41:44,516 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2021-12-22 10:41:44,516 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 30 states
[2021-12-22 10:41:44,516 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-12-22 10:41:44,517 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants.
[2021-12-22 10:41:44,517 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=647, Unknown=0, NotChecked=0, Total=870
[2021-12-22 10:41:44,517 INFO  L87              Difference]: Start difference. First operand 50 states and 50 transitions. Second operand  has 30 states, 30 states have (on average 3.6333333333333333) internal successors, (109), 30 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-22 10:41:49,173 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-12-22 10:41:49,173 INFO  L93              Difference]: Finished difference Result 115 states and 126 transitions.
[2021-12-22 10:41:49,173 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. 
[2021-12-22 10:41:49,174 INFO  L78                 Accepts]: Start accepts. Automaton has  has 30 states, 30 states have (on average 3.6333333333333333) internal successors, (109), 30 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49
[2021-12-22 10:41:49,174 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-12-22 10:41:49,175 INFO  L225             Difference]: With dead ends: 115
[2021-12-22 10:41:49,175 INFO  L226             Difference]: Without dead ends: 112
[2021-12-22 10:41:49,176 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=683, Invalid=1867, Unknown=0, NotChecked=0, Total=2550
[2021-12-22 10:41:49,177 INFO  L933         BasicCegarLoop]: 17 mSDtfsCounter, 522 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 522 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time
[2021-12-22 10:41:49,177 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [522 Valid, 214 Invalid, 798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [262 Valid, 536 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time]
[2021-12-22 10:41:49,178 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 112 states.
[2021-12-22 10:41:49,184 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 110.
[2021-12-22 10:41:49,185 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 110 states, 109 states have (on average 1.0091743119266054) internal successors, (110), 109 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-22 10:41:49,186 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions.
[2021-12-22 10:41:49,186 INFO  L78                 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 49
[2021-12-22 10:41:49,186 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-12-22 10:41:49,186 INFO  L470      AbstractCegarLoop]: Abstraction has 110 states and 110 transitions.
[2021-12-22 10:41:49,186 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 30 states, 30 states have (on average 3.6333333333333333) internal successors, (109), 30 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-22 10:41:49,187 INFO  L276                IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions.
[2021-12-22 10:41:49,188 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 110
[2021-12-22 10:41:49,188 INFO  L506         BasicCegarLoop]: Found error trace
[2021-12-22 10:41:49,189 INFO  L514         BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-12-22 10:41:49,207 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2021-12-22 10:41:49,406 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-12-22 10:41:49,407 INFO  L402      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-12-22 10:41:49,407 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-12-22 10:41:49,407 INFO  L85        PathProgramCache]: Analyzing trace with hash -715219644, now seen corresponding path program 2 times
[2021-12-22 10:41:49,407 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-12-22 10:41:49,408 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291883600]
[2021-12-22 10:41:49,408 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-12-22 10:41:49,408 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-12-22 10:41:49,484 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-12-22 10:41:49,948 INFO  L134       CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 429 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-12-22 10:41:49,948 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-12-22 10:41:49,948 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291883600]
[2021-12-22 10:41:49,949 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291883600] provided 0 perfect and 1 imperfect interpolant sequences
[2021-12-22 10:41:49,949 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328553499]
[2021-12-22 10:41:49,949 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2021-12-22 10:41:49,949 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-12-22 10:41:49,950 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2021-12-22 10:41:49,951 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2021-12-22 10:41:49,952 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2021-12-22 10:41:50,314 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2021-12-22 10:41:50,315 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2021-12-22 10:41:50,320 INFO  L263         TraceCheckSpWp]: Trace formula consists of 1281 conjuncts, 49 conjunts are in the unsatisfiable core
[2021-12-22 10:41:50,324 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2021-12-22 10:41:50,710 INFO  L134       CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 429 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-12-22 10:41:50,711 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2021-12-22 10:41:51,820 INFO  L134       CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 429 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-12-22 10:41:51,821 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [328553499] provided 0 perfect and 2 imperfect interpolant sequences
[2021-12-22 10:41:51,821 INFO  L186   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2021-12-22 10:41:51,821 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 26, 26] total 54
[2021-12-22 10:41:51,821 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632829709]
[2021-12-22 10:41:51,821 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2021-12-22 10:41:51,822 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 54 states
[2021-12-22 10:41:51,822 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-12-22 10:41:51,823 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants.
[2021-12-22 10:41:51,824 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=709, Invalid=2153, Unknown=0, NotChecked=0, Total=2862
[2021-12-22 10:41:51,824 INFO  L87              Difference]: Start difference. First operand 110 states and 110 transitions. Second operand  has 54 states, 54 states have (on average 4.2407407407407405) internal successors, (229), 54 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-22 10:42:36,060 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-12-22 10:42:36,060 INFO  L93              Difference]: Finished difference Result 215 states and 234 transitions.
[2021-12-22 10:42:36,060 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. 
[2021-12-22 10:42:36,061 INFO  L78                 Accepts]: Start accepts. Automaton has  has 54 states, 54 states have (on average 4.2407407407407405) internal successors, (229), 54 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109
[2021-12-22 10:42:36,061 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-12-22 10:42:36,065 INFO  L225             Difference]: With dead ends: 215
[2021-12-22 10:42:36,065 INFO  L226             Difference]: Without dead ends: 212
[2021-12-22 10:42:36,069 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 192 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1026 ImplicationChecksByTransitivity, 44.1s TimeCoverageRelationStatistics Valid=2208, Invalid=6722, Unknown=0, NotChecked=0, Total=8930
[2021-12-22 10:42:36,071 INFO  L933         BasicCegarLoop]: 29 mSDtfsCounter, 1170 mSDsluCounter, 638 mSDsCounter, 0 mSdLazyCounter, 2057 mSolverCounterSat, 592 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1170 SdHoareTripleChecker+Valid, 667 SdHoareTripleChecker+Invalid, 2649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 592 IncrementalHoareTripleChecker+Valid, 2057 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time
[2021-12-22 10:42:36,072 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [1170 Valid, 667 Invalid, 2649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [592 Valid, 2057 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time]
[2021-12-22 10:42:36,073 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 212 states.
[2021-12-22 10:42:36,084 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 210.
[2021-12-22 10:42:36,086 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 210 states, 209 states have (on average 1.0047846889952152) internal successors, (210), 209 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-22 10:42:36,087 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 210 transitions.
[2021-12-22 10:42:36,087 INFO  L78                 Accepts]: Start accepts. Automaton has 210 states and 210 transitions. Word has length 109
[2021-12-22 10:42:36,088 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-12-22 10:42:36,088 INFO  L470      AbstractCegarLoop]: Abstraction has 210 states and 210 transitions.
[2021-12-22 10:42:36,088 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 54 states, 54 states have (on average 4.2407407407407405) internal successors, (229), 54 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-22 10:42:36,088 INFO  L276                IsEmpty]: Start isEmpty. Operand 210 states and 210 transitions.
[2021-12-22 10:42:36,091 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 210
[2021-12-22 10:42:36,091 INFO  L506         BasicCegarLoop]: Found error trace
[2021-12-22 10:42:36,091 INFO  L514         BasicCegarLoop]: trace histogram [34, 34, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-12-22 10:42:36,111 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0
[2021-12-22 10:42:36,295 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2
[2021-12-22 10:42:36,296 INFO  L402      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-12-22 10:42:36,296 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-12-22 10:42:36,296 INFO  L85        PathProgramCache]: Analyzing trace with hash -203406972, now seen corresponding path program 3 times
[2021-12-22 10:42:36,296 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-12-22 10:42:36,296 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053445642]
[2021-12-22 10:42:36,296 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-12-22 10:42:36,297 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-12-22 10:42:37,063 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-12-22 10:42:38,591 INFO  L134       CoverageAnalysis]: Checked inductivity of 2739 backedges. 99 proven. 2640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-12-22 10:42:38,592 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-12-22 10:42:38,592 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053445642]
[2021-12-22 10:42:38,592 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053445642] provided 0 perfect and 1 imperfect interpolant sequences
[2021-12-22 10:42:38,592 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43396909]
[2021-12-22 10:42:38,592 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2021-12-22 10:42:38,592 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-12-22 10:42:38,592 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2021-12-22 10:42:38,595 INFO  L229       MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2021-12-22 10:42:38,597 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2021-12-22 10:42:40,025 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s)
[2021-12-22 10:42:40,025 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2021-12-22 10:42:40,033 INFO  L263         TraceCheckSpWp]: Trace formula consists of 863 conjuncts, 128 conjunts are in the unsatisfiable core
[2021-12-22 10:42:40,042 INFO  L286         TraceCheckSpWp]: Computing forward predicates...