./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-acceleration/functions_1-2.c --full-output --architecture 32bit


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


Checking for ERROR reachability
Using default analysis
Version eb692b52
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-acceleration/functions_1-2.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 3c699f32b26271d9b8672d2685c3f1aa3d3ad54df32baf7d1d77d9a96ddd2517
--- Real Ultimate output ---
This is Ultimate 0.2.2-?-eb692b5
[2022-07-19 14:59:21,608 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2022-07-19 14:59:21,610 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2022-07-19 14:59:21,633 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2022-07-19 14:59:21,643 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2022-07-19 14:59:21,644 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2022-07-19 14:59:21,645 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2022-07-19 14:59:21,649 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2022-07-19 14:59:21,653 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2022-07-19 14:59:21,654 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2022-07-19 14:59:21,655 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2022-07-19 14:59:21,656 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2022-07-19 14:59:21,657 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2022-07-19 14:59:21,658 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2022-07-19 14:59:21,659 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2022-07-19 14:59:21,661 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2022-07-19 14:59:21,662 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2022-07-19 14:59:21,663 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2022-07-19 14:59:21,664 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2022-07-19 14:59:21,665 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2022-07-19 14:59:21,666 INFO  L181        SettingsManager]: Resetting HornVerifier preferences to default values
[2022-07-19 14:59:21,667 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2022-07-19 14:59:21,667 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2022-07-19 14:59:21,668 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2022-07-19 14:59:21,669 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2022-07-19 14:59:21,671 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2022-07-19 14:59:21,675 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2022-07-19 14:59:21,675 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2022-07-19 14:59:21,676 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2022-07-19 14:59:21,676 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2022-07-19 14:59:21,677 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2022-07-19 14:59:21,678 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2022-07-19 14:59:21,678 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2022-07-19 14:59:21,679 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2022-07-19 14:59:21,680 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2022-07-19 14:59:21,681 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2022-07-19 14:59:21,681 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2022-07-19 14:59:21,681 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2022-07-19 14:59:21,683 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2022-07-19 14:59:21,683 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2022-07-19 14:59:21,684 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2022-07-19 14:59:21,684 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2022-07-19 14:59:21,686 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf
[2022-07-19 14:59:21,710 INFO  L113        SettingsManager]: Loading preferences was successful
[2022-07-19 14:59:21,710 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2022-07-19 14:59:21,711 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2022-07-19 14:59:21,711 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2022-07-19 14:59:21,712 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2022-07-19 14:59:21,712 INFO  L138        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2022-07-19 14:59:21,712 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2022-07-19 14:59:21,712 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2022-07-19 14:59:21,712 INFO  L138        SettingsManager]:  * Use SBE=true
[2022-07-19 14:59:21,713 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2022-07-19 14:59:21,713 INFO  L138        SettingsManager]:  * sizeof long=4
[2022-07-19 14:59:21,714 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2022-07-19 14:59:21,714 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2022-07-19 14:59:21,714 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2022-07-19 14:59:21,714 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2022-07-19 14:59:21,714 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2022-07-19 14:59:21,714 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2022-07-19 14:59:21,714 INFO  L138        SettingsManager]:  * sizeof long double=12
[2022-07-19 14:59:21,714 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2022-07-19 14:59:21,716 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2022-07-19 14:59:21,716 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2022-07-19 14:59:21,716 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2022-07-19 14:59:21,716 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2022-07-19 14:59:21,716 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2022-07-19 14:59:21,716 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-07-19 14:59:21,717 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2022-07-19 14:59:21,717 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2022-07-19 14:59:21,717 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2022-07-19 14:59:21,717 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2022-07-19 14:59:21,717 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2022-07-19 14:59:21,717 INFO  L138        SettingsManager]:  * Apply one-shot large block encoding in concurrent analysis=false
[2022-07-19 14:59:21,717 INFO  L138        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2022-07-19 14:59:21,718 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2022-07-19 14:59:21,718 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 -> 3c699f32b26271d9b8672d2685c3f1aa3d3ad54df32baf7d1d77d9a96ddd2517
[2022-07-19 14:59:21,943 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2022-07-19 14:59:21,962 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2022-07-19 14:59:21,964 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2022-07-19 14:59:21,965 INFO  L271        PluginConnector]: Initializing CDTParser...
[2022-07-19 14:59:21,965 INFO  L275        PluginConnector]: CDTParser initialized
[2022-07-19 14:59:21,966 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-acceleration/functions_1-2.c
[2022-07-19 14:59:22,011 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42e469469/df8d4c120b484e44991da086c8ae1167/FLAG16e2c241c
[2022-07-19 14:59:22,376 INFO  L306              CDTParser]: Found 1 translation units.
[2022-07-19 14:59:22,377 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/functions_1-2.c
[2022-07-19 14:59:22,383 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42e469469/df8d4c120b484e44991da086c8ae1167/FLAG16e2c241c
[2022-07-19 14:59:22,794 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42e469469/df8d4c120b484e44991da086c8ae1167
[2022-07-19 14:59:22,797 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2022-07-19 14:59:22,798 INFO  L131        ToolchainWalker]: Walking toolchain with 6 elements.
[2022-07-19 14:59:22,800 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2022-07-19 14:59:22,800 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2022-07-19 14:59:22,802 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2022-07-19 14:59:22,803 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 02:59:22" (1/1) ...
[2022-07-19 14:59:22,804 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57097bb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:59:22, skipping insertion in model container
[2022-07-19 14:59:22,804 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 02:59:22" (1/1) ...
[2022-07-19 14:59:22,809 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2022-07-19 14:59:22,819 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2022-07-19 14:59:22,901 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-acceleration/functions_1-2.c[325,338]
[2022-07-19 14:59:22,910 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-07-19 14:59:22,918 INFO  L203         MainTranslator]: Completed pre-run
[2022-07-19 14:59:22,928 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-acceleration/functions_1-2.c[325,338]
[2022-07-19 14:59:22,935 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-07-19 14:59:22,945 INFO  L208         MainTranslator]: Completed translation
[2022-07-19 14:59:22,946 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:59:22 WrapperNode
[2022-07-19 14:59:22,946 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2022-07-19 14:59:22,947 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2022-07-19 14:59:22,947 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2022-07-19 14:59:22,947 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2022-07-19 14:59:22,952 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:59:22" (1/1) ...
[2022-07-19 14:59:22,958 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:59:22" (1/1) ...
[2022-07-19 14:59:22,970 INFO  L137                Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 28
[2022-07-19 14:59:22,970 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2022-07-19 14:59:22,971 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2022-07-19 14:59:22,971 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2022-07-19 14:59:22,971 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2022-07-19 14:59:22,977 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:59:22" (1/1) ...
[2022-07-19 14:59:22,977 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:59:22" (1/1) ...
[2022-07-19 14:59:22,978 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:59:22" (1/1) ...
[2022-07-19 14:59:22,978 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:59:22" (1/1) ...
[2022-07-19 14:59:22,980 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:59:22" (1/1) ...
[2022-07-19 14:59:22,982 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:59:22" (1/1) ...
[2022-07-19 14:59:22,983 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:59:22" (1/1) ...
[2022-07-19 14:59:22,986 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2022-07-19 14:59:22,987 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2022-07-19 14:59:22,989 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2022-07-19 14:59:22,989 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2022-07-19 14:59:22,990 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:59:22" (1/1) ...
[2022-07-19 14:59:23,017 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-07-19 14:59:23,024 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-07-19 14:59:23,034 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)
[2022-07-19 14:59:23,036 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
[2022-07-19 14:59:23,062 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2022-07-19 14:59:23,062 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2022-07-19 14:59:23,062 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2022-07-19 14:59:23,063 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2022-07-19 14:59:23,114 INFO  L234             CfgBuilder]: Building ICFG
[2022-07-19 14:59:23,115 INFO  L260             CfgBuilder]: Building CFG for each procedure with an implementation
[2022-07-19 14:59:23,188 INFO  L275             CfgBuilder]: Performing block encoding
[2022-07-19 14:59:23,192 INFO  L294             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2022-07-19 14:59:23,193 INFO  L299             CfgBuilder]: Removed 1 assume(true) statements.
[2022-07-19 14:59:23,194 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 02:59:23 BoogieIcfgContainer
[2022-07-19 14:59:23,194 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2022-07-19 14:59:23,195 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2022-07-19 14:59:23,196 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2022-07-19 14:59:23,201 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2022-07-19 14:59:23,201 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 02:59:22" (1/3) ...
[2022-07-19 14:59:23,202 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58b92a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 02:59:23, skipping insertion in model container
[2022-07-19 14:59:23,214 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:59:22" (2/3) ...
[2022-07-19 14:59:23,214 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58b92a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 02:59:23, skipping insertion in model container
[2022-07-19 14:59:23,214 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 02:59:23" (3/3) ...
[2022-07-19 14:59:23,216 INFO  L111   eAbstractionObserver]: Analyzing ICFG functions_1-2.c
[2022-07-19 14:59:23,227 INFO  L201   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2022-07-19 14:59:23,227 INFO  L160   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2022-07-19 14:59:23,303 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2022-07-19 14:59:23,309 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@2fb5c803, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4358e8
[2022-07-19 14:59:23,309 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2022-07-19 14:59:23,312 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 12 states, 10 states have (on average 1.4) internal successors, (14), 11 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)
[2022-07-19 14:59:23,316 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 7
[2022-07-19 14:59:23,316 INFO  L187           NwaCegarLoop]: Found error trace
[2022-07-19 14:59:23,317 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1]
[2022-07-19 14:59:23,317 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-07-19 14:59:23,321 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-07-19 14:59:23,321 INFO  L85        PathProgramCache]: Analyzing trace with hash 889635821, now seen corresponding path program 1 times
[2022-07-19 14:59:23,336 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-07-19 14:59:23,336 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278607876]
[2022-07-19 14:59:23,336 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-07-19 14:59:23,342 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-07-19 14:59:23,432 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-07-19 14:59:23,511 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-07-19 14:59:23,512 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-07-19 14:59:23,512 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278607876]
[2022-07-19 14:59:23,513 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278607876] provided 1 perfect and 0 imperfect interpolant sequences
[2022-07-19 14:59:23,513 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-07-19 14:59:23,513 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2022-07-19 14:59:23,514 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847608443]
[2022-07-19 14:59:23,515 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-07-19 14:59:23,518 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-07-19 14:59:23,518 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-07-19 14:59:23,541 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-07-19 14:59:23,541 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-07-19 14:59:23,543 INFO  L87              Difference]: Start difference. First operand  has 12 states, 10 states have (on average 1.4) internal successors, (14), 11 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) Second operand  has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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)
[2022-07-19 14:59:23,567 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-07-19 14:59:23,567 INFO  L93              Difference]: Finished difference Result 22 states and 26 transitions.
[2022-07-19 14:59:23,568 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-07-19 14:59:23,569 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 6
[2022-07-19 14:59:23,570 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-07-19 14:59:23,574 INFO  L225             Difference]: With dead ends: 22
[2022-07-19 14:59:23,574 INFO  L226             Difference]: Without dead ends: 10
[2022-07-19 14:59:23,576 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-07-19 14:59:23,579 INFO  L413           NwaCegarLoop]: 11 mSDtfsCounter, 1 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-07-19 14:59:23,581 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 18 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-07-19 14:59:23,592 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10 states.
[2022-07-19 14:59:23,599 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9.
[2022-07-19 14:59:23,600 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 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)
[2022-07-19 14:59:23,600 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions.
[2022-07-19 14:59:23,601 INFO  L78                 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6
[2022-07-19 14:59:23,601 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-07-19 14:59:23,601 INFO  L495      AbstractCegarLoop]: Abstraction has 9 states and 9 transitions.
[2022-07-19 14:59:23,602 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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)
[2022-07-19 14:59:23,602 INFO  L276                IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions.
[2022-07-19 14:59:23,602 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 9
[2022-07-19 14:59:23,602 INFO  L187           NwaCegarLoop]: Found error trace
[2022-07-19 14:59:23,602 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1]
[2022-07-19 14:59:23,603 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2022-07-19 14:59:23,603 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-07-19 14:59:23,604 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-07-19 14:59:23,604 INFO  L85        PathProgramCache]: Analyzing trace with hash 294764431, now seen corresponding path program 1 times
[2022-07-19 14:59:23,604 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-07-19 14:59:23,604 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582748825]
[2022-07-19 14:59:23,604 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-07-19 14:59:23,605 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-07-19 14:59:23,617 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-07-19 14:59:23,668 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-07-19 14:59:23,668 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-07-19 14:59:23,669 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582748825]
[2022-07-19 14:59:23,669 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582748825] provided 0 perfect and 1 imperfect interpolant sequences
[2022-07-19 14:59:23,669 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734676489]
[2022-07-19 14:59:23,669 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-07-19 14:59:23,670 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-07-19 14:59:23,670 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-07-19 14:59:23,671 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)
[2022-07-19 14:59:23,672 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2022-07-19 14:59:23,702 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-07-19 14:59:23,703 INFO  L263         TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 11 conjunts are in the unsatisfiable core
[2022-07-19 14:59:23,707 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-07-19 14:59:23,791 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-07-19 14:59:23,791 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-07-19 14:59:23,832 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-07-19 14:59:23,833 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [734676489] provided 0 perfect and 2 imperfect interpolant sequences
[2022-07-19 14:59:23,833 INFO  L184   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-07-19 14:59:23,834 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9
[2022-07-19 14:59:23,834 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839856672]
[2022-07-19 14:59:23,836 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-07-19 14:59:23,836 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 9 states
[2022-07-19 14:59:23,837 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-07-19 14:59:23,838 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2022-07-19 14:59:23,839 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72
[2022-07-19 14:59:23,839 INFO  L87              Difference]: Start difference. First operand 9 states and 9 transitions. Second operand  has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 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)
[2022-07-19 14:59:23,928 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-07-19 14:59:23,929 INFO  L93              Difference]: Finished difference Result 17 states and 18 transitions.
[2022-07-19 14:59:23,929 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2022-07-19 14:59:23,929 INFO  L78                 Accepts]: Start accepts. Automaton has  has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 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) Word has length 8
[2022-07-19 14:59:23,930 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-07-19 14:59:23,930 INFO  L225             Difference]: With dead ends: 17
[2022-07-19 14:59:23,930 INFO  L226             Difference]: Without dead ends: 13
[2022-07-19 14:59:23,931 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156
[2022-07-19 14:59:23,932 INFO  L413           NwaCegarLoop]: 6 mSDtfsCounter, 1 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-07-19 14:59:23,933 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 27 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-07-19 14:59:23,934 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 13 states.
[2022-07-19 14:59:23,936 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13.
[2022-07-19 14:59:23,936 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 12 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)
[2022-07-19 14:59:23,936 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions.
[2022-07-19 14:59:23,937 INFO  L78                 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 8
[2022-07-19 14:59:23,937 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-07-19 14:59:23,937 INFO  L495      AbstractCegarLoop]: Abstraction has 13 states and 13 transitions.
[2022-07-19 14:59:23,937 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 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)
[2022-07-19 14:59:23,937 INFO  L276                IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions.
[2022-07-19 14:59:23,938 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 13
[2022-07-19 14:59:23,938 INFO  L187           NwaCegarLoop]: Found error trace
[2022-07-19 14:59:23,938 INFO  L195           NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1]
[2022-07-19 14:59:23,956 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0
[2022-07-19 14:59:24,151 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-07-19 14:59:24,152 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-07-19 14:59:24,152 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-07-19 14:59:24,152 INFO  L85        PathProgramCache]: Analyzing trace with hash 1489810771, now seen corresponding path program 2 times
[2022-07-19 14:59:24,153 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-07-19 14:59:24,153 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935504456]
[2022-07-19 14:59:24,153 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-07-19 14:59:24,153 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-07-19 14:59:24,174 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-07-19 14:59:24,305 INFO  L134       CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-07-19 14:59:24,306 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-07-19 14:59:24,306 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935504456]
[2022-07-19 14:59:24,306 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935504456] provided 0 perfect and 1 imperfect interpolant sequences
[2022-07-19 14:59:24,309 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920819952]
[2022-07-19 14:59:24,310 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2022-07-19 14:59:24,310 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-07-19 14:59:24,310 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-07-19 14:59:24,311 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)
[2022-07-19 14:59:24,335 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2022-07-19 14:59:24,357 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2022-07-19 14:59:24,358 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-07-19 14:59:24,359 INFO  L263         TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 27 conjunts are in the unsatisfiable core
[2022-07-19 14:59:24,360 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-07-19 14:59:24,438 INFO  L134       CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-07-19 14:59:24,439 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-07-19 14:59:24,557 INFO  L134       CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-07-19 14:59:24,558 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920819952] provided 0 perfect and 2 imperfect interpolant sequences
[2022-07-19 14:59:24,558 INFO  L184   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-07-19 14:59:24,559 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17
[2022-07-19 14:59:24,559 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679551144]
[2022-07-19 14:59:24,559 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-07-19 14:59:24,560 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 17 states
[2022-07-19 14:59:24,560 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-07-19 14:59:24,560 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants.
[2022-07-19 14:59:24,561 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272
[2022-07-19 14:59:24,562 INFO  L87              Difference]: Start difference. First operand 13 states and 13 transitions. Second operand  has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 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)
[2022-07-19 14:59:24,914 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-07-19 14:59:24,914 INFO  L93              Difference]: Finished difference Result 25 states and 28 transitions.
[2022-07-19 14:59:24,917 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. 
[2022-07-19 14:59:24,917 INFO  L78                 Accepts]: Start accepts. Automaton has  has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 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
[2022-07-19 14:59:24,917 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-07-19 14:59:24,917 INFO  L225             Difference]: With dead ends: 25
[2022-07-19 14:59:24,917 INFO  L226             Difference]: Without dead ends: 21
[2022-07-19 14:59:24,918 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=223, Invalid=589, Unknown=0, NotChecked=0, Total=812
[2022-07-19 14:59:24,919 INFO  L413           NwaCegarLoop]: 6 mSDtfsCounter, 4 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-07-19 14:59:24,919 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 36 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-07-19 14:59:24,920 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 21 states.
[2022-07-19 14:59:24,926 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21.
[2022-07-19 14:59:24,927 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 21 states, 20 states have (on average 1.05) internal successors, (21), 20 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)
[2022-07-19 14:59:24,927 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions.
[2022-07-19 14:59:24,927 INFO  L78                 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 12
[2022-07-19 14:59:24,927 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-07-19 14:59:24,927 INFO  L495      AbstractCegarLoop]: Abstraction has 21 states and 21 transitions.
[2022-07-19 14:59:24,928 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 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)
[2022-07-19 14:59:24,928 INFO  L276                IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions.
[2022-07-19 14:59:24,928 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 21
[2022-07-19 14:59:24,928 INFO  L187           NwaCegarLoop]: Found error trace
[2022-07-19 14:59:24,928 INFO  L195           NwaCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1]
[2022-07-19 14:59:24,945 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0
[2022-07-19 14:59:25,129 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,SelfDestructingSolverStorable2
[2022-07-19 14:59:25,129 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-07-19 14:59:25,130 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-07-19 14:59:25,130 INFO  L85        PathProgramCache]: Analyzing trace with hash 1781144283, now seen corresponding path program 3 times
[2022-07-19 14:59:25,130 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-07-19 14:59:25,130 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867347794]
[2022-07-19 14:59:25,130 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-07-19 14:59:25,130 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-07-19 14:59:25,150 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-07-19 14:59:25,356 INFO  L134       CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-07-19 14:59:25,356 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-07-19 14:59:25,356 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867347794]
[2022-07-19 14:59:25,356 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867347794] provided 0 perfect and 1 imperfect interpolant sequences
[2022-07-19 14:59:25,356 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248108136]
[2022-07-19 14:59:25,357 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2022-07-19 14:59:25,357 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-07-19 14:59:25,357 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-07-19 14:59:25,358 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)
[2022-07-19 14:59:25,359 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2022-07-19 14:59:25,423 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s)
[2022-07-19 14:59:25,423 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-07-19 14:59:25,424 WARN  L261         TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 59 conjunts are in the unsatisfiable core
[2022-07-19 14:59:25,425 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-07-19 14:59:25,508 INFO  L134       CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-07-19 14:59:25,508 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-07-19 14:59:25,831 INFO  L134       CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-07-19 14:59:25,832 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [248108136] provided 0 perfect and 2 imperfect interpolant sequences
[2022-07-19 14:59:25,832 INFO  L184   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-07-19 14:59:25,832 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33
[2022-07-19 14:59:25,832 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895989147]
[2022-07-19 14:59:25,832 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-07-19 14:59:25,832 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 33 states
[2022-07-19 14:59:25,832 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-07-19 14:59:25,833 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants.
[2022-07-19 14:59:25,833 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=864, Unknown=0, NotChecked=0, Total=1056
[2022-07-19 14:59:25,833 INFO  L87              Difference]: Start difference. First operand 21 states and 21 transitions. Second operand  has 33 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 33 states have internal predecessors, (38), 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)
[2022-07-19 14:59:33,915 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-07-19 14:59:33,916 INFO  L93              Difference]: Finished difference Result 41 states and 48 transitions.
[2022-07-19 14:59:33,916 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. 
[2022-07-19 14:59:33,916 INFO  L78                 Accepts]: Start accepts. Automaton has  has 33 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 33 states have internal predecessors, (38), 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 20
[2022-07-19 14:59:33,916 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-07-19 14:59:33,917 INFO  L225             Difference]: With dead ends: 41
[2022-07-19 14:59:33,917 INFO  L226             Difference]: Without dead ends: 37
[2022-07-19 14:59:33,918 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=895, Invalid=2765, Unknown=0, NotChecked=0, Total=3660
[2022-07-19 14:59:33,918 INFO  L413           NwaCegarLoop]: 6 mSDtfsCounter, 6 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time
[2022-07-19 14:59:33,919 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 75 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time]
[2022-07-19 14:59:33,919 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 37 states.
[2022-07-19 14:59:33,923 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37.
[2022-07-19 14:59:33,924 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 37 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 36 states have internal predecessors, (37), 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)
[2022-07-19 14:59:33,924 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions.
[2022-07-19 14:59:33,924 INFO  L78                 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 20
[2022-07-19 14:59:33,925 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-07-19 14:59:33,925 INFO  L495      AbstractCegarLoop]: Abstraction has 37 states and 37 transitions.
[2022-07-19 14:59:33,925 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 33 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 33 states have internal predecessors, (38), 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)
[2022-07-19 14:59:33,925 INFO  L276                IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions.
[2022-07-19 14:59:33,926 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 37
[2022-07-19 14:59:33,926 INFO  L187           NwaCegarLoop]: Found error trace
[2022-07-19 14:59:33,926 INFO  L195           NwaCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1]
[2022-07-19 14:59:33,936 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0
[2022-07-19 14:59:34,126 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-07-19 14:59:34,127 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-07-19 14:59:34,128 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-07-19 14:59:34,128 INFO  L85        PathProgramCache]: Analyzing trace with hash 685690347, now seen corresponding path program 4 times
[2022-07-19 14:59:34,128 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-07-19 14:59:34,128 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946706840]
[2022-07-19 14:59:34,128 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-07-19 14:59:34,129 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-07-19 14:59:34,163 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-07-19 14:59:34,678 INFO  L134       CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-07-19 14:59:34,678 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-07-19 14:59:34,679 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946706840]
[2022-07-19 14:59:34,679 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946706840] provided 0 perfect and 1 imperfect interpolant sequences
[2022-07-19 14:59:34,679 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978775983]
[2022-07-19 14:59:34,679 INFO  L93    rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
[2022-07-19 14:59:34,679 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-07-19 14:59:34,679 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-07-19 14:59:34,680 INFO  L229       MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-07-19 14:59:34,682 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2022-07-19 14:59:34,719 INFO  L228   tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2022-07-19 14:59:34,719 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-07-19 14:59:34,721 WARN  L261         TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 123 conjunts are in the unsatisfiable core
[2022-07-19 14:59:34,723 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-07-19 14:59:34,831 INFO  L134       CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-07-19 14:59:34,831 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-07-19 14:59:36,118 INFO  L134       CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-07-19 14:59:36,118 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [978775983] provided 0 perfect and 2 imperfect interpolant sequences
[2022-07-19 14:59:36,118 INFO  L184   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-07-19 14:59:36,118 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 65
[2022-07-19 14:59:36,118 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056526096]
[2022-07-19 14:59:36,118 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-07-19 14:59:36,118 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 65 states
[2022-07-19 14:59:36,119 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-07-19 14:59:36,119 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants.
[2022-07-19 14:59:36,120 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=640, Invalid=3520, Unknown=0, NotChecked=0, Total=4160
[2022-07-19 14:59:36,121 INFO  L87              Difference]: Start difference. First operand 37 states and 37 transitions. Second operand  has 65 states, 65 states have (on average 1.0769230769230769) internal successors, (70), 65 states have internal predecessors, (70), 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)
[2022-07-19 14:59:50,634 WARN  L233               SmtUtils]: Spent 5.32s on a formula simplification. DAG size of input: 107 DAG size of output: 16 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)
[2022-07-19 15:03:44,869 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-07-19 15:03:44,870 INFO  L93              Difference]: Finished difference Result 73 states and 88 transitions.
[2022-07-19 15:03:44,870 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. 
[2022-07-19 15:03:44,870 INFO  L78                 Accepts]: Start accepts. Automaton has  has 65 states, 65 states have (on average 1.0769230769230769) internal successors, (70), 65 states have internal predecessors, (70), 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 36
[2022-07-19 15:03:44,870 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-07-19 15:03:44,871 INFO  L225             Difference]: With dead ends: 73
[2022-07-19 15:03:44,871 INFO  L226             Difference]: Without dead ends: 69
[2022-07-19 15:03:44,874 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2111 ImplicationChecksByTransitivity, 248.7s TimeCoverageRelationStatistics Valid=3578, Invalid=11916, Unknown=6, NotChecked=0, Total=15500
[2022-07-19 15:03:44,875 INFO  L413           NwaCegarLoop]: 6 mSDtfsCounter, 11 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 1062 mSolverCounterSat, 542 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 1604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 542 IncrementalHoareTripleChecker+Valid, 1062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time
[2022-07-19 15:03:44,875 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 150 Invalid, 1604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [542 Valid, 1062 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time]
[2022-07-19 15:03:44,875 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 69 states.
[2022-07-19 15:03:44,882 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69.
[2022-07-19 15:03:44,882 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 69 states, 68 states have (on average 1.0147058823529411) internal successors, (69), 68 states have internal predecessors, (69), 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)
[2022-07-19 15:03:44,883 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions.
[2022-07-19 15:03:44,883 INFO  L78                 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 36
[2022-07-19 15:03:44,883 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-07-19 15:03:44,883 INFO  L495      AbstractCegarLoop]: Abstraction has 69 states and 69 transitions.
[2022-07-19 15:03:44,884 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 65 states, 65 states have (on average 1.0769230769230769) internal successors, (70), 65 states have internal predecessors, (70), 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)
[2022-07-19 15:03:44,884 INFO  L276                IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions.
[2022-07-19 15:03:44,885 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 69
[2022-07-19 15:03:44,885 INFO  L187           NwaCegarLoop]: Found error trace
[2022-07-19 15:03:44,885 INFO  L195           NwaCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1]
[2022-07-19 15:03:44,902 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0
[2022-07-19 15:03:45,095 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-07-19 15:03:45,095 INFO  L420      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-07-19 15:03:45,096 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-07-19 15:03:45,096 INFO  L85        PathProgramCache]: Analyzing trace with hash 1963971595, now seen corresponding path program 5 times
[2022-07-19 15:03:45,096 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-07-19 15:03:45,096 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146655158]
[2022-07-19 15:03:45,096 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-07-19 15:03:45,096 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-07-19 15:03:45,154 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-07-19 15:03:46,849 INFO  L134       CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-07-19 15:03:46,850 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-07-19 15:03:46,850 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146655158]
[2022-07-19 15:03:46,850 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146655158] provided 0 perfect and 1 imperfect interpolant sequences
[2022-07-19 15:03:46,850 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898347423]
[2022-07-19 15:03:46,850 INFO  L93    rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1
[2022-07-19 15:03:46,850 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-07-19 15:03:46,850 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-07-19 15:03:46,851 INFO  L229       MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-07-19 15:03:46,852 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process
[2022-07-19 15:04:09,030 INFO  L228   tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s)
[2022-07-19 15:04:09,030 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-07-19 15:04:09,049 WARN  L261         TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 251 conjunts are in the unsatisfiable core
[2022-07-19 15:04:09,053 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-07-19 15:04:09,288 INFO  L134       CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-07-19 15:04:09,288 INFO  L328         TraceCheckSpWp]: Computing backward predicates...