./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/bitvector/gcd_2.c --full-output --architecture 32bit


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


Checking for ERROR reachability
Using default analysis
Version 35987657
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/bitvector/gcd_2.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 7da096d64cf3390a2bb7c442378ab6f697dfdf0fd9d4078975ad6171409858bb
--- Real Ultimate output ---
This is Ultimate 0.2.2-?-3598765
[2022-07-20 22:23:45,034 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2022-07-20 22:23:45,036 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2022-07-20 22:23:45,073 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2022-07-20 22:23:45,073 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2022-07-20 22:23:45,074 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2022-07-20 22:23:45,076 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2022-07-20 22:23:45,077 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2022-07-20 22:23:45,079 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2022-07-20 22:23:45,082 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2022-07-20 22:23:45,082 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2022-07-20 22:23:45,084 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2022-07-20 22:23:45,084 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2022-07-20 22:23:45,086 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2022-07-20 22:23:45,086 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2022-07-20 22:23:45,089 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2022-07-20 22:23:45,089 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2022-07-20 22:23:45,090 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2022-07-20 22:23:45,091 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2022-07-20 22:23:45,096 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2022-07-20 22:23:45,097 INFO  L181        SettingsManager]: Resetting HornVerifier preferences to default values
[2022-07-20 22:23:45,097 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2022-07-20 22:23:45,098 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2022-07-20 22:23:45,099 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2022-07-20 22:23:45,100 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2022-07-20 22:23:45,105 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2022-07-20 22:23:45,105 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2022-07-20 22:23:45,105 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2022-07-20 22:23:45,106 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2022-07-20 22:23:45,106 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2022-07-20 22:23:45,107 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2022-07-20 22:23:45,107 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2022-07-20 22:23:45,109 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2022-07-20 22:23:45,109 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2022-07-20 22:23:45,110 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2022-07-20 22:23:45,110 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2022-07-20 22:23:45,111 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2022-07-20 22:23:45,111 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2022-07-20 22:23:45,111 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2022-07-20 22:23:45,111 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2022-07-20 22:23:45,112 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2022-07-20 22:23:45,113 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2022-07-20 22:23:45,114 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf
[2022-07-20 22:23:45,137 INFO  L113        SettingsManager]: Loading preferences was successful
[2022-07-20 22:23:45,137 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2022-07-20 22:23:45,137 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2022-07-20 22:23:45,137 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2022-07-20 22:23:45,138 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2022-07-20 22:23:45,138 INFO  L138        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2022-07-20 22:23:45,139 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2022-07-20 22:23:45,139 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2022-07-20 22:23:45,139 INFO  L138        SettingsManager]:  * Use SBE=true
[2022-07-20 22:23:45,139 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2022-07-20 22:23:45,140 INFO  L138        SettingsManager]:  * sizeof long=4
[2022-07-20 22:23:45,140 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2022-07-20 22:23:45,140 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2022-07-20 22:23:45,140 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2022-07-20 22:23:45,140 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2022-07-20 22:23:45,140 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2022-07-20 22:23:45,140 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2022-07-20 22:23:45,141 INFO  L138        SettingsManager]:  * sizeof long double=12
[2022-07-20 22:23:45,141 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2022-07-20 22:23:45,141 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2022-07-20 22:23:45,142 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2022-07-20 22:23:45,142 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2022-07-20 22:23:45,142 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2022-07-20 22:23:45,142 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2022-07-20 22:23:45,142 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-07-20 22:23:45,143 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2022-07-20 22:23:45,143 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2022-07-20 22:23:45,143 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2022-07-20 22:23:45,143 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2022-07-20 22:23:45,143 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2022-07-20 22:23:45,143 INFO  L138        SettingsManager]:  * Apply one-shot large block encoding in concurrent analysis=false
[2022-07-20 22:23:45,143 INFO  L138        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2022-07-20 22:23:45,144 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2022-07-20 22:23:45,144 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 -> 7da096d64cf3390a2bb7c442378ab6f697dfdf0fd9d4078975ad6171409858bb
[2022-07-20 22:23:45,302 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2022-07-20 22:23:45,315 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2022-07-20 22:23:45,317 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2022-07-20 22:23:45,318 INFO  L271        PluginConnector]: Initializing CDTParser...
[2022-07-20 22:23:45,318 INFO  L275        PluginConnector]: CDTParser initialized
[2022-07-20 22:23:45,319 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/gcd_2.c
[2022-07-20 22:23:45,355 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db3123131/f3b60908b63249e09ee0a34e78976e28/FLAG53008937f
[2022-07-20 22:23:45,699 INFO  L306              CDTParser]: Found 1 translation units.
[2022-07-20 22:23:45,700 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/gcd_2.c
[2022-07-20 22:23:45,711 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db3123131/f3b60908b63249e09ee0a34e78976e28/FLAG53008937f
[2022-07-20 22:23:46,138 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db3123131/f3b60908b63249e09ee0a34e78976e28
[2022-07-20 22:23:46,140 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2022-07-20 22:23:46,142 INFO  L131        ToolchainWalker]: Walking toolchain with 6 elements.
[2022-07-20 22:23:46,144 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2022-07-20 22:23:46,144 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2022-07-20 22:23:46,147 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2022-07-20 22:23:46,147 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:23:46" (1/1) ...
[2022-07-20 22:23:46,148 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bf90c87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:23:46, skipping insertion in model container
[2022-07-20 22:23:46,148 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:23:46" (1/1) ...
[2022-07-20 22:23:46,153 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2022-07-20 22:23:46,163 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2022-07-20 22:23:46,285 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/bitvector/gcd_2.c[664,677]
[2022-07-20 22:23:46,295 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-07-20 22:23:46,300 INFO  L203         MainTranslator]: Completed pre-run
[2022-07-20 22:23:46,307 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/bitvector/gcd_2.c[664,677]
[2022-07-20 22:23:46,311 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-07-20 22:23:46,322 INFO  L208         MainTranslator]: Completed translation
[2022-07-20 22:23:46,323 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:23:46 WrapperNode
[2022-07-20 22:23:46,323 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2022-07-20 22:23:46,324 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2022-07-20 22:23:46,324 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2022-07-20 22:23:46,324 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2022-07-20 22:23:46,329 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:23:46" (1/1) ...
[2022-07-20 22:23:46,334 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:23:46" (1/1) ...
[2022-07-20 22:23:46,350 INFO  L137                Inliner]: procedures = 14, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 47
[2022-07-20 22:23:46,351 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2022-07-20 22:23:46,352 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2022-07-20 22:23:46,352 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2022-07-20 22:23:46,352 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2022-07-20 22:23:46,358 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:23:46" (1/1) ...
[2022-07-20 22:23:46,358 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:23:46" (1/1) ...
[2022-07-20 22:23:46,365 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:23:46" (1/1) ...
[2022-07-20 22:23:46,366 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:23:46" (1/1) ...
[2022-07-20 22:23:46,373 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:23:46" (1/1) ...
[2022-07-20 22:23:46,379 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:23:46" (1/1) ...
[2022-07-20 22:23:46,383 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:23:46" (1/1) ...
[2022-07-20 22:23:46,386 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2022-07-20 22:23:46,387 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2022-07-20 22:23:46,387 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2022-07-20 22:23:46,387 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2022-07-20 22:23:46,388 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:23:46" (1/1) ...
[2022-07-20 22:23:46,393 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-07-20 22:23:46,400 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-07-20 22:23:46,437 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)
[2022-07-20 22:23:46,476 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
[2022-07-20 22:23:46,502 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2022-07-20 22:23:46,502 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2022-07-20 22:23:46,502 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2022-07-20 22:23:46,502 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2022-07-20 22:23:46,543 INFO  L234             CfgBuilder]: Building ICFG
[2022-07-20 22:23:46,544 INFO  L260             CfgBuilder]: Building CFG for each procedure with an implementation
[2022-07-20 22:23:46,632 INFO  L275             CfgBuilder]: Performing block encoding
[2022-07-20 22:23:46,636 INFO  L294             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2022-07-20 22:23:46,636 INFO  L299             CfgBuilder]: Removed 1 assume(true) statements.
[2022-07-20 22:23:46,637 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:23:46 BoogieIcfgContainer
[2022-07-20 22:23:46,637 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2022-07-20 22:23:46,638 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2022-07-20 22:23:46,638 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2022-07-20 22:23:46,657 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2022-07-20 22:23:46,657 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 10:23:46" (1/3) ...
[2022-07-20 22:23:46,658 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38cbe60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:23:46, skipping insertion in model container
[2022-07-20 22:23:46,658 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:23:46" (2/3) ...
[2022-07-20 22:23:46,658 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38cbe60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:23:46, skipping insertion in model container
[2022-07-20 22:23:46,658 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:23:46" (3/3) ...
[2022-07-20 22:23:46,659 INFO  L111   eAbstractionObserver]: Analyzing ICFG gcd_2.c
[2022-07-20 22:23:46,669 INFO  L201   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2022-07-20 22:23:46,674 INFO  L160   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2022-07-20 22:23:46,710 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2022-07-20 22:23:46,718 INFO  L357      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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@461ab89d, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4eedad13
[2022-07-20 22:23:46,718 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2022-07-20 22:23:46,721 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 16 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 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)
[2022-07-20 22:23:46,725 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 11
[2022-07-20 22:23:46,725 INFO  L187           NwaCegarLoop]: Found error trace
[2022-07-20 22:23:46,726 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-07-20 22:23:46,726 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-07-20 22:23:46,730 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-07-20 22:23:46,730 INFO  L85        PathProgramCache]: Analyzing trace with hash 777289588, now seen corresponding path program 1 times
[2022-07-20 22:23:46,736 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-07-20 22:23:46,736 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722472766]
[2022-07-20 22:23:46,737 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-07-20 22:23:46,737 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-07-20 22:23:46,836 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-07-20 22:23:46,923 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-07-20 22:23:46,924 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-07-20 22:23:46,924 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722472766]
[2022-07-20 22:23:46,925 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722472766] provided 1 perfect and 0 imperfect interpolant sequences
[2022-07-20 22:23:46,925 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-07-20 22:23:46,925 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2022-07-20 22:23:46,939 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278924692]
[2022-07-20 22:23:46,940 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-07-20 22:23:46,942 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2022-07-20 22:23:46,943 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-07-20 22:23:46,976 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2022-07-20 22:23:46,976 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2022-07-20 22:23:46,978 INFO  L87              Difference]: Start difference. First operand  has 16 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 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 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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)
[2022-07-20 22:23:47,039 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-07-20 22:23:47,040 INFO  L93              Difference]: Finished difference Result 48 states and 61 transitions.
[2022-07-20 22:23:47,041 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2022-07-20 22:23:47,042 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 10
[2022-07-20 22:23:47,042 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-07-20 22:23:47,046 INFO  L225             Difference]: With dead ends: 48
[2022-07-20 22:23:47,047 INFO  L226             Difference]: Without dead ends: 18
[2022-07-20 22:23:47,048 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2022-07-20 22:23:47,051 INFO  L413           NwaCegarLoop]: 13 mSDtfsCounter, 26 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-07-20 22:23:47,052 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 35 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-07-20 22:23:47,062 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 18 states.
[2022-07-20 22:23:47,069 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 11.
[2022-07-20 22:23:47,070 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 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)
[2022-07-20 22:23:47,070 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions.
[2022-07-20 22:23:47,071 INFO  L78                 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 10
[2022-07-20 22:23:47,071 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-07-20 22:23:47,071 INFO  L495      AbstractCegarLoop]: Abstraction has 11 states and 12 transitions.
[2022-07-20 22:23:47,071 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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)
[2022-07-20 22:23:47,072 INFO  L276                IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions.
[2022-07-20 22:23:47,072 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 11
[2022-07-20 22:23:47,072 INFO  L187           NwaCegarLoop]: Found error trace
[2022-07-20 22:23:47,072 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-07-20 22:23:47,072 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2022-07-20 22:23:47,073 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-07-20 22:23:47,073 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-07-20 22:23:47,073 INFO  L85        PathProgramCache]: Analyzing trace with hash -1742670346, now seen corresponding path program 1 times
[2022-07-20 22:23:47,074 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-07-20 22:23:47,074 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183610901]
[2022-07-20 22:23:47,074 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-07-20 22:23:47,074 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-07-20 22:23:47,084 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-07-20 22:23:47,100 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-07-20 22:23:47,101 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-07-20 22:23:47,101 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183610901]
[2022-07-20 22:23:47,101 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183610901] provided 1 perfect and 0 imperfect interpolant sequences
[2022-07-20 22:23:47,101 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-07-20 22:23:47,101 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2022-07-20 22:23:47,102 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009164081]
[2022-07-20 22:23:47,102 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-07-20 22:23:47,103 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2022-07-20 22:23:47,103 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-07-20 22:23:47,103 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2022-07-20 22:23:47,104 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2022-07-20 22:23:47,104 INFO  L87              Difference]: Start difference. First operand 11 states and 12 transitions. Second operand  has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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)
[2022-07-20 22:23:47,118 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-07-20 22:23:47,118 INFO  L93              Difference]: Finished difference Result 18 states and 19 transitions.
[2022-07-20 22:23:47,118 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2022-07-20 22:23:47,118 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 10
[2022-07-20 22:23:47,119 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-07-20 22:23:47,119 INFO  L225             Difference]: With dead ends: 18
[2022-07-20 22:23:47,119 INFO  L226             Difference]: Without dead ends: 12
[2022-07-20 22:23:47,120 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2022-07-20 22:23:47,121 INFO  L413           NwaCegarLoop]: 9 mSDtfsCounter, 4 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-07-20 22:23:47,121 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 22 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-07-20 22:23:47,122 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12 states.
[2022-07-20 22:23:47,123 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12.
[2022-07-20 22:23:47,123 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 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)
[2022-07-20 22:23:47,123 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions.
[2022-07-20 22:23:47,124 INFO  L78                 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 10
[2022-07-20 22:23:47,124 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-07-20 22:23:47,124 INFO  L495      AbstractCegarLoop]: Abstraction has 12 states and 13 transitions.
[2022-07-20 22:23:47,124 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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)
[2022-07-20 22:23:47,124 INFO  L276                IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions.
[2022-07-20 22:23:47,125 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 12
[2022-07-20 22:23:47,125 INFO  L187           NwaCegarLoop]: Found error trace
[2022-07-20 22:23:47,125 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-07-20 22:23:47,125 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2022-07-20 22:23:47,125 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-07-20 22:23:47,126 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-07-20 22:23:47,126 INFO  L85        PathProgramCache]: Analyzing trace with hash -881880042, now seen corresponding path program 1 times
[2022-07-20 22:23:47,126 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-07-20 22:23:47,126 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627249141]
[2022-07-20 22:23:47,126 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-07-20 22:23:47,127 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-07-20 22:23:47,135 ERROR L245   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-07-20 22:23:47,135 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [880680446]
[2022-07-20 22:23:47,136 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-07-20 22:23:47,136 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-07-20 22:23:47,136 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-07-20 22:23:47,138 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-07-20 22:23:47,139 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2022-07-20 22:23:47,171 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-07-20 22:23:47,173 INFO  L263         TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core
[2022-07-20 22:23:47,176 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-07-20 22:23:47,235 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-07-20 22:23:47,235 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-07-20 22:23:47,264 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-07-20 22:23:47,265 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-07-20 22:23:47,265 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627249141]
[2022-07-20 22:23:47,265 WARN  L310   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-07-20 22:23:47,265 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880680446]
[2022-07-20 22:23:47,265 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [880680446] provided 0 perfect and 2 imperfect interpolant sequences
[2022-07-20 22:23:47,266 INFO  L184   FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2022-07-20 22:23:47,266 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7
[2022-07-20 22:23:47,266 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176332443]
[2022-07-20 22:23:47,266 INFO  L85    oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2022-07-20 22:23:47,266 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2022-07-20 22:23:47,267 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-07-20 22:23:47,267 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2022-07-20 22:23:47,267 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2022-07-20 22:23:47,268 INFO  L87              Difference]: Start difference. First operand 12 states and 13 transitions. Second operand  has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 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)
[2022-07-20 22:23:47,312 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-07-20 22:23:47,313 INFO  L93              Difference]: Finished difference Result 19 states and 20 transitions.
[2022-07-20 22:23:47,313 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2022-07-20 22:23:47,313 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 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 11
[2022-07-20 22:23:47,313 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-07-20 22:23:47,314 INFO  L225             Difference]: With dead ends: 19
[2022-07-20 22:23:47,314 INFO  L226             Difference]: Without dead ends: 13
[2022-07-20 22:23:47,314 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90
[2022-07-20 22:23:47,315 INFO  L413           NwaCegarLoop]: 7 mSDtfsCounter, 7 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-07-20 22:23:47,316 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 33 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-07-20 22:23:47,316 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 13 states.
[2022-07-20 22:23:47,317 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13.
[2022-07-20 22:23:47,317 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 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)
[2022-07-20 22:23:47,318 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions.
[2022-07-20 22:23:47,318 INFO  L78                 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11
[2022-07-20 22:23:47,318 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-07-20 22:23:47,318 INFO  L495      AbstractCegarLoop]: Abstraction has 13 states and 14 transitions.
[2022-07-20 22:23:47,318 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 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)
[2022-07-20 22:23:47,319 INFO  L276                IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions.
[2022-07-20 22:23:47,319 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 13
[2022-07-20 22:23:47,319 INFO  L187           NwaCegarLoop]: Found error trace
[2022-07-20 22:23:47,319 INFO  L195           NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-07-20 22:23:47,348 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2022-07-20 22:23:47,536 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-07-20 22:23:47,537 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-07-20 22:23:47,537 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-07-20 22:23:47,537 INFO  L85        PathProgramCache]: Analyzing trace with hash 32815606, now seen corresponding path program 2 times
[2022-07-20 22:23:47,538 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-07-20 22:23:47,538 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074821244]
[2022-07-20 22:23:47,538 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-07-20 22:23:47,539 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-07-20 22:23:47,557 ERROR L245   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-07-20 22:23:47,558 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1000518982]
[2022-07-20 22:23:47,558 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2022-07-20 22:23:47,558 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-07-20 22:23:47,559 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-07-20 22:23:47,560 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-07-20 22:23:47,561 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2022-07-20 22:23:47,601 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2022-07-20 22:23:47,601 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-07-20 22:23:47,602 INFO  L263         TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 26 conjunts are in the unsatisfiable core
[2022-07-20 22:23:47,604 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-07-20 22:25:27,898 INFO  L134       CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-07-20 22:25:27,899 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-07-20 22:26:39,878 INFO  L134       CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-07-20 22:26:39,878 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-07-20 22:26:39,878 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074821244]
[2022-07-20 22:26:39,878 WARN  L310   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-07-20 22:26:39,878 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000518982]
[2022-07-20 22:26:39,879 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000518982] provided 0 perfect and 2 imperfect interpolant sequences
[2022-07-20 22:26:39,879 INFO  L184   FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2022-07-20 22:26:39,879 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17
[2022-07-20 22:26:39,879 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847866864]
[2022-07-20 22:26:39,879 INFO  L85    oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2022-07-20 22:26:39,879 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 17 states
[2022-07-20 22:26:39,879 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-07-20 22:26:39,880 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants.
[2022-07-20 22:26:39,880 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=199, Unknown=24, NotChecked=0, Total=272
[2022-07-20 22:26:39,880 INFO  L87              Difference]: Start difference. First operand 13 states and 14 transitions. Second operand  has 17 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 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)
[2022-07-20 22:26:50,958 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-07-20 22:26:50,958 INFO  L93              Difference]: Finished difference Result 20 states and 21 transitions.
[2022-07-20 22:26:50,958 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2022-07-20 22:26:50,959 INFO  L78                 Accepts]: Start accepts. Automaton has  has 17 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 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 12
[2022-07-20 22:26:50,959 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-07-20 22:26:50,959 INFO  L225             Difference]: With dead ends: 20
[2022-07-20 22:26:50,959 INFO  L226             Difference]: Without dead ends: 14
[2022-07-20 22:26:50,960 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 83.7s TimeCoverageRelationStatistics Valid=54, Invalid=228, Unknown=24, NotChecked=0, Total=306
[2022-07-20 22:26:50,960 INFO  L413           NwaCegarLoop]: 6 mSDtfsCounter, 6 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-07-20 22:26:50,960 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 46 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 21 Unchecked, 0.1s Time]
[2022-07-20 22:26:50,961 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 14 states.
[2022-07-20 22:26:50,961 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14.
[2022-07-20 22:26:50,962 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 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)
[2022-07-20 22:26:50,962 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions.
[2022-07-20 22:26:50,962 INFO  L78                 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 12
[2022-07-20 22:26:50,962 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-07-20 22:26:50,962 INFO  L495      AbstractCegarLoop]: Abstraction has 14 states and 15 transitions.
[2022-07-20 22:26:50,962 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 17 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 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)
[2022-07-20 22:26:50,962 INFO  L276                IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions.
[2022-07-20 22:26:50,963 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 14
[2022-07-20 22:26:50,963 INFO  L187           NwaCegarLoop]: Found error trace
[2022-07-20 22:26:50,963 INFO  L195           NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-07-20 22:26:50,980 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0
[2022-07-20 22:26:51,175 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3
[2022-07-20 22:26:51,176 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-07-20 22:26:51,176 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-07-20 22:26:51,176 INFO  L85        PathProgramCache]: Analyzing trace with hash -1676390378, now seen corresponding path program 3 times
[2022-07-20 22:26:51,176 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-07-20 22:26:51,176 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371148768]
[2022-07-20 22:26:51,176 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-07-20 22:26:51,176 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-07-20 22:26:51,182 ERROR L245   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-07-20 22:26:51,183 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [490244705]
[2022-07-20 22:26:51,183 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2022-07-20 22:26:51,183 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-07-20 22:26:51,191 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-07-20 22:26:51,194 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)
[2022-07-20 22:26:51,197 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2022-07-20 22:26:51,245 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s)
[2022-07-20 22:26:51,245 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-07-20 22:26:51,247 INFO  L263         TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core
[2022-07-20 22:26:51,248 INFO  L286         TraceCheckSpWp]: Computing forward predicates...