/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInlineTransformed.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_SUM.epf -i ../../../trunk/examples/svcomp/loop-invariants/linear-inequality-inv-a.c


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


This is Ultimate 0.2.2-dev-a10ec3b
[2022-01-11 02:11:54,809 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2022-01-11 02:11:54,811 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2022-01-11 02:11:54,865 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2022-01-11 02:11:54,865 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2022-01-11 02:11:54,867 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
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[2022-01-11 02:11:54,882 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2022-01-11 02:11:54,884 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2022-01-11 02:11:54,885 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2022-01-11 02:11:54,888 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2022-01-11 02:11:54,889 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2022-01-11 02:11:54,890 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2022-01-11 02:11:54,891 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2022-01-11 02:11:54,895 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2022-01-11 02:11:54,896 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2022-01-11 02:11:54,897 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2022-01-11 02:11:54,898 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2022-01-11 02:11:54,899 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2022-01-11 02:11:54,904 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
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[2022-01-11 02:11:54,905 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2022-01-11 02:11:54,906 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2022-01-11 02:11:54,907 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2022-01-11 02:11:54,907 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2022-01-11 02:11:54,907 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2022-01-11 02:11:54,908 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2022-01-11 02:11:54,910 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2022-01-11 02:11:54,910 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2022-01-11 02:11:54,911 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2022-01-11 02:11:54,911 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2022-01-11 02:11:54,912 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2022-01-11 02:11:54,912 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2022-01-11 02:11:54,912 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2022-01-11 02:11:54,914 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2022-01-11 02:11:54,914 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_SUM.epf
[2022-01-11 02:11:54,945 INFO  L113        SettingsManager]: Loading preferences was successful
[2022-01-11 02:11:54,946 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2022-01-11 02:11:54,946 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2022-01-11 02:11:54,946 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2022-01-11 02:11:54,947 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2022-01-11 02:11:54,948 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2022-01-11 02:11:54,948 INFO  L138        SettingsManager]:  * Use SBE=true
[2022-01-11 02:11:54,948 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2022-01-11 02:11:54,948 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2022-01-11 02:11:54,948 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2022-01-11 02:11:54,949 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2022-01-11 02:11:54,949 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2022-01-11 02:11:54,949 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2022-01-11 02:11:54,949 INFO  L138        SettingsManager]:  * Adapt memory model on pointer casts if necessary=true
[2022-01-11 02:11:54,949 INFO  L138        SettingsManager]:  * Use bitvectors instead of ints=true
[2022-01-11 02:11:54,950 INFO  L138        SettingsManager]:  * Memory model=HoenickeLindenmann_4ByteResolution
[2022-01-11 02:11:54,950 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2022-01-11 02:11:54,950 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2022-01-11 02:11:54,950 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2022-01-11 02:11:54,950 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2022-01-11 02:11:54,950 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2022-01-11 02:11:54,951 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-01-11 02:11:54,951 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2022-01-11 02:11:54,951 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2022-01-11 02:11:54,952 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2022-01-11 02:11:54,952 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2022-01-11 02:11:54,952 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2022-01-11 02:11:54,952 INFO  L138        SettingsManager]:  * Large block encoding in concurrent analysis=OFF
[2022-01-11 02:11:54,952 INFO  L138        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2022-01-11 02:11:54,952 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2022-01-11 02:11:54,952 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2022-01-11 02:11:54,952 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2022-01-11 02:11:54,953 INFO  L136        SettingsManager]: Preferences of IcfgTransformer differ from their defaults:
[2022-01-11 02:11:54,953 INFO  L138        SettingsManager]:  * TransformationType=BV_TO_INT_SUM
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int)
WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN;
[2022-01-11 02:11:55,134 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2022-01-11 02:11:55,151 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2022-01-11 02:11:55,154 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2022-01-11 02:11:55,155 INFO  L271        PluginConnector]: Initializing CDTParser...
[2022-01-11 02:11:55,155 INFO  L275        PluginConnector]: CDTParser initialized
[2022-01-11 02:11:55,156 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invariants/linear-inequality-inv-a.c
[2022-01-11 02:11:55,206 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe9495149/66b91c4dfc4e4e6cae89859864d0e30a/FLAG12a87b332
[2022-01-11 02:11:55,548 INFO  L306              CDTParser]: Found 1 translation units.
[2022-01-11 02:11:55,548 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invariants/linear-inequality-inv-a.c
[2022-01-11 02:11:55,553 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe9495149/66b91c4dfc4e4e6cae89859864d0e30a/FLAG12a87b332
[2022-01-11 02:11:55,984 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe9495149/66b91c4dfc4e4e6cae89859864d0e30a
[2022-01-11 02:11:55,986 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2022-01-11 02:11:55,987 INFO  L131        ToolchainWalker]: Walking toolchain with 6 elements.
[2022-01-11 02:11:55,988 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2022-01-11 02:11:55,988 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2022-01-11 02:11:55,991 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2022-01-11 02:11:55,992 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 02:11:55" (1/1) ...
[2022-01-11 02:11:55,992 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78ea0d20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:11:55, skipping insertion in model container
[2022-01-11 02:11:55,993 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 02:11:55" (1/1) ...
[2022-01-11 02:11:55,998 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2022-01-11 02:11:56,008 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2022-01-11 02:11:56,132 WARN  L230   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invariants/linear-inequality-inv-a.c[557,570]
[2022-01-11 02:11:56,134 WARN  L230   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invariants/linear-inequality-inv-a.c[613,626]
[2022-01-11 02:11:56,135 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-01-11 02:11:56,143 INFO  L203         MainTranslator]: Completed pre-run
[2022-01-11 02:11:56,157 WARN  L230   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invariants/linear-inequality-inv-a.c[557,570]
[2022-01-11 02:11:56,157 WARN  L230   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invariants/linear-inequality-inv-a.c[613,626]
[2022-01-11 02:11:56,158 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-01-11 02:11:56,187 INFO  L208         MainTranslator]: Completed translation
[2022-01-11 02:11:56,187 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:11:56 WrapperNode
[2022-01-11 02:11:56,188 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2022-01-11 02:11:56,189 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2022-01-11 02:11:56,189 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2022-01-11 02:11:56,189 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2022-01-11 02:11:56,196 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:11:56" (1/1) ...
[2022-01-11 02:11:56,212 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:11:56" (1/1) ...
[2022-01-11 02:11:56,234 INFO  L137                Inliner]: procedures = 11, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 38
[2022-01-11 02:11:56,235 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2022-01-11 02:11:56,236 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2022-01-11 02:11:56,236 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2022-01-11 02:11:56,236 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2022-01-11 02:11:56,242 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:11:56" (1/1) ...
[2022-01-11 02:11:56,243 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:11:56" (1/1) ...
[2022-01-11 02:11:56,246 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:11:56" (1/1) ...
[2022-01-11 02:11:56,246 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:11:56" (1/1) ...
[2022-01-11 02:11:56,261 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:11:56" (1/1) ...
[2022-01-11 02:11:56,265 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:11:56" (1/1) ...
[2022-01-11 02:11:56,271 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:11:56" (1/1) ...
[2022-01-11 02:11:56,272 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2022-01-11 02:11:56,273 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2022-01-11 02:11:56,273 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2022-01-11 02:11:56,273 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2022-01-11 02:11:56,275 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:11:56" (1/1) ...
[2022-01-11 02:11:56,283 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-01-11 02:11:56,292 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-11 02:11:56,304 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2022-01-11 02:11:56,329 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2022-01-11 02:11:56,351 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2022-01-11 02:11:56,351 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2022-01-11 02:11:56,351 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2022-01-11 02:11:56,351 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1
[2022-01-11 02:11:56,407 INFO  L234             CfgBuilder]: Building ICFG
[2022-01-11 02:11:56,409 INFO  L260             CfgBuilder]: Building CFG for each procedure with an implementation
[2022-01-11 02:11:56,495 INFO  L275             CfgBuilder]: Performing block encoding
[2022-01-11 02:11:56,500 INFO  L294             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2022-01-11 02:11:56,500 INFO  L299             CfgBuilder]: Removed 1 assume(true) statements.
[2022-01-11 02:11:56,501 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 02:11:56 BoogieIcfgContainer
[2022-01-11 02:11:56,501 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2022-01-11 02:11:56,502 INFO  L113        PluginConnector]: ------------------------IcfgTransformer----------------------------
[2022-01-11 02:11:56,502 INFO  L271        PluginConnector]: Initializing IcfgTransformer...
[2022-01-11 02:11:56,503 INFO  L275        PluginConnector]: IcfgTransformer initialized
[2022-01-11 02:11:56,506 INFO  L185        PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 02:11:56" (1/1) ...
[2022-01-11 02:11:56,550 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 02:11:56 BasicIcfg
[2022-01-11 02:11:56,551 INFO  L132        PluginConnector]: ------------------------ END IcfgTransformer----------------------------
[2022-01-11 02:11:56,552 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2022-01-11 02:11:56,552 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2022-01-11 02:11:56,554 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2022-01-11 02:11:56,555 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.01 02:11:55" (1/4) ...
[2022-01-11 02:11:56,555 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a63eb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 02:11:56, skipping insertion in model container
[2022-01-11 02:11:56,555 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:11:56" (2/4) ...
[2022-01-11 02:11:56,556 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a63eb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 02:11:56, skipping insertion in model container
[2022-01-11 02:11:56,556 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 02:11:56" (3/4) ...
[2022-01-11 02:11:56,556 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a63eb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.01 02:11:56, skipping insertion in model container
[2022-01-11 02:11:56,556 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 02:11:56" (4/4) ...
[2022-01-11 02:11:56,557 INFO  L111   eAbstractionObserver]: Analyzing ICFG linear-inequality-inv-a.cTransformedIcfg
[2022-01-11 02:11:56,561 INFO  L204   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2022-01-11 02:11:56,561 INFO  L163   ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations.
[2022-01-11 02:11:56,596 INFO  L338      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2022-01-11 02:11:56,602 INFO  L339      AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR
[2022-01-11 02:11:56,603 INFO  L340      AbstractCegarLoop]: Starting to check reachability of 2 error locations.
[2022-01-11 02:11:56,615 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 13 states, 10 states have (on average 1.7) internal successors, (17), 12 states have internal predecessors, (17), 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)
[2022-01-11 02:11:56,619 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 7
[2022-01-11 02:11:56,619 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-11 02:11:56,620 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1]
[2022-01-11 02:11:56,620 INFO  L402      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-11 02:11:56,624 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-11 02:11:56,624 INFO  L85        PathProgramCache]: Analyzing trace with hash 1983109542, now seen corresponding path program 1 times
[2022-01-11 02:11:56,630 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-11 02:11:56,631 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250239088]
[2022-01-11 02:11:56,631 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-11 02:11:56,631 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-11 02:11:56,786 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-11 02:11:56,839 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-11 02:11:56,840 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-11 02:11:56,841 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250239088]
[2022-01-11 02:11:56,842 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250239088] provided 1 perfect and 0 imperfect interpolant sequences
[2022-01-11 02:11:56,842 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-01-11 02:11:56,842 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2022-01-11 02:11:56,844 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423957781]
[2022-01-11 02:11:56,845 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-11 02:11:56,849 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 2 states
[2022-01-11 02:11:56,850 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-11 02:11:56,880 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2022-01-11 02:11:56,881 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2022-01-11 02:11:56,883 INFO  L87              Difference]: Start difference. First operand  has 13 states, 10 states have (on average 1.7) internal successors, (17), 12 states have internal predecessors, (17), 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 2 states, 2 states have (on average 3.0) internal successors, (6), 2 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)
[2022-01-11 02:11:56,896 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-11 02:11:56,896 INFO  L93              Difference]: Finished difference Result 22 states and 27 transitions.
[2022-01-11 02:11:56,898 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. 
[2022-01-11 02:11:56,899 INFO  L78                 Accepts]: Start accepts. Automaton has  has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 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
[2022-01-11 02:11:56,900 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-11 02:11:56,906 INFO  L225             Difference]: With dead ends: 22
[2022-01-11 02:11:56,906 INFO  L226             Difference]: Without dead ends: 10
[2022-01-11 02:11:56,910 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2022-01-11 02:11:56,914 INFO  L933         BasicCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-01-11 02:11:56,915 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-01-11 02:11:56,929 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10 states.
[2022-01-11 02:11:56,939 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10.
[2022-01-11 02:11:56,940 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 10 states, 8 states have (on average 1.25) internal successors, (10), 9 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)
[2022-01-11 02:11:56,941 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions.
[2022-01-11 02:11:56,942 INFO  L78                 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 6
[2022-01-11 02:11:56,942 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-11 02:11:56,942 INFO  L470      AbstractCegarLoop]: Abstraction has 10 states and 10 transitions.
[2022-01-11 02:11:56,942 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 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)
[2022-01-11 02:11:56,942 INFO  L276                IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions.
[2022-01-11 02:11:56,943 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 7
[2022-01-11 02:11:56,943 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-11 02:11:56,943 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1]
[2022-01-11 02:11:56,943 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2022-01-11 02:11:56,944 INFO  L402      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-11 02:11:56,944 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-11 02:11:56,944 INFO  L85        PathProgramCache]: Analyzing trace with hash 1983110503, now seen corresponding path program 1 times
[2022-01-11 02:11:56,945 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-11 02:11:56,945 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307493271]
[2022-01-11 02:11:56,945 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-11 02:11:56,945 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-11 02:11:56,964 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-11 02:11:57,034 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-11 02:11:57,035 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-11 02:11:57,035 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307493271]
[2022-01-11 02:11:57,036 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307493271] provided 1 perfect and 0 imperfect interpolant sequences
[2022-01-11 02:11:57,036 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-01-11 02:11:57,036 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2022-01-11 02:11:57,036 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057783992]
[2022-01-11 02:11:57,037 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-11 02:11:57,038 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-01-11 02:11:57,039 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-11 02:11:57,040 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-01-11 02:11:57,043 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-01-11 02:11:57,043 INFO  L87              Difference]: Start difference. First operand 10 states and 10 transitions. 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)
[2022-01-11 02:11:57,068 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-11 02:11:57,069 INFO  L93              Difference]: Finished difference Result 17 states and 17 transitions.
[2022-01-11 02:11:57,069 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-01-11 02:11:57,069 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
[2022-01-11 02:11:57,070 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-11 02:11:57,070 INFO  L225             Difference]: With dead ends: 17
[2022-01-11 02:11:57,070 INFO  L226             Difference]: Without dead ends: 15
[2022-01-11 02:11:57,071 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-01-11 02:11:57,072 INFO  L933         BasicCegarLoop]: 7 mSDtfsCounter, 3 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-01-11 02:11:57,073 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 11 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-01-11 02:11:57,076 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 15 states.
[2022-01-11 02:11:57,078 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 12.
[2022-01-11 02:11:57,079 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 12 states, 10 states have (on average 1.3) 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)
[2022-01-11 02:11:57,080 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions.
[2022-01-11 02:11:57,080 INFO  L78                 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 6
[2022-01-11 02:11:57,080 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-11 02:11:57,081 INFO  L470      AbstractCegarLoop]: Abstraction has 12 states and 13 transitions.
[2022-01-11 02:11:57,081 INFO  L471      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)
[2022-01-11 02:11:57,083 INFO  L276                IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions.
[2022-01-11 02:11:57,084 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8
[2022-01-11 02:11:57,085 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-11 02:11:57,086 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1]
[2022-01-11 02:11:57,090 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2022-01-11 02:11:57,091 INFO  L402      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-11 02:11:57,094 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-11 02:11:57,094 INFO  L85        PathProgramCache]: Analyzing trace with hash 1346884524, now seen corresponding path program 1 times
[2022-01-11 02:11:57,094 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-11 02:11:57,095 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441687561]
[2022-01-11 02:11:57,095 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-11 02:11:57,095 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-11 02:11:57,111 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-11 02:11:57,150 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-11 02:11:57,150 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-11 02:11:57,151 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441687561]
[2022-01-11 02:11:57,151 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441687561] provided 1 perfect and 0 imperfect interpolant sequences
[2022-01-11 02:11:57,151 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-01-11 02:11:57,151 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2022-01-11 02:11:57,151 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923775236]
[2022-01-11 02:11:57,152 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-11 02:11:57,152 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-01-11 02:11:57,153 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-11 02:11:57,153 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-01-11 02:11:57,153 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-01-11 02:11:57,154 INFO  L87              Difference]: Start difference. First operand 12 states and 13 transitions. Second operand  has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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)
[2022-01-11 02:11:57,168 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-11 02:11:57,168 INFO  L93              Difference]: Finished difference Result 15 states and 15 transitions.
[2022-01-11 02:11:57,168 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-01-11 02:11:57,169 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 7
[2022-01-11 02:11:57,169 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-11 02:11:57,169 INFO  L225             Difference]: With dead ends: 15
[2022-01-11 02:11:57,169 INFO  L226             Difference]: Without dead ends: 11
[2022-01-11 02:11:57,171 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-01-11 02:11:57,175 INFO  L933         BasicCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-01-11 02:11:57,177 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-01-11 02:11:57,178 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 11 states.
[2022-01-11 02:11:57,181 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11.
[2022-01-11 02:11:57,181 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 11 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 10 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)
[2022-01-11 02:11:57,182 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions.
[2022-01-11 02:11:57,182 INFO  L78                 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 7
[2022-01-11 02:11:57,182 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-11 02:11:57,182 INFO  L470      AbstractCegarLoop]: Abstraction has 11 states and 11 transitions.
[2022-01-11 02:11:57,182 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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)
[2022-01-11 02:11:57,183 INFO  L276                IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions.
[2022-01-11 02:11:57,183 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8
[2022-01-11 02:11:57,183 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-11 02:11:57,183 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1]
[2022-01-11 02:11:57,183 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2022-01-11 02:11:57,183 INFO  L402      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-11 02:11:57,185 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-11 02:11:57,185 INFO  L85        PathProgramCache]: Analyzing trace with hash 1346910343, now seen corresponding path program 1 times
[2022-01-11 02:11:57,185 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-11 02:11:57,185 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543275712]
[2022-01-11 02:11:57,185 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-11 02:11:57,185 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-11 02:11:57,221 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-11 02:11:57,281 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-11 02:11:57,281 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-11 02:11:57,282 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543275712]
[2022-01-11 02:11:57,282 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543275712] provided 0 perfect and 1 imperfect interpolant sequences
[2022-01-11 02:11:57,282 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203293932]
[2022-01-11 02:11:57,282 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-11 02:11:57,282 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-11 02:11:57,282 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-11 02:11:57,287 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)
[2022-01-11 02:11:57,326 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2022-01-11 02:11:57,347 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-11 02:11:57,350 INFO  L263         TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core
[2022-01-11 02:11:57,355 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-11 02:11:57,565 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-11 02:11:57,566 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-01-11 02:11:57,656 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-11 02:11:57,657 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [203293932] provided 0 perfect and 2 imperfect interpolant sequences
[2022-01-11 02:11:57,657 INFO  L186   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-01-11 02:11:57,657 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6
[2022-01-11 02:11:57,657 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452921835]
[2022-01-11 02:11:57,657 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-01-11 02:11:57,658 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2022-01-11 02:11:57,658 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-11 02:11:57,659 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2022-01-11 02:11:57,659 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2022-01-11 02:11:57,659 INFO  L87              Difference]: Start difference. First operand 11 states and 11 transitions. Second operand  has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 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)
[2022-01-11 02:11:57,742 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-11 02:11:57,742 INFO  L93              Difference]: Finished difference Result 20 states and 22 transitions.
[2022-01-11 02:11:57,743 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2022-01-11 02:11:57,743 INFO  L78                 Accepts]: Start accepts. Automaton has  has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 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) Word has length 7
[2022-01-11 02:11:57,743 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-11 02:11:57,743 INFO  L225             Difference]: With dead ends: 20
[2022-01-11 02:11:57,743 INFO  L226             Difference]: Without dead ends: 18
[2022-01-11 02:11:57,744 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56
[2022-01-11 02:11:57,744 INFO  L933         BasicCegarLoop]: 7 mSDtfsCounter, 11 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-01-11 02:11:57,745 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 21 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-01-11 02:11:57,745 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 18 states.
[2022-01-11 02:11:57,748 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 14.
[2022-01-11 02:11:57,748 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 14 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 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)
[2022-01-11 02:11:57,748 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions.
[2022-01-11 02:11:57,748 INFO  L78                 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 7
[2022-01-11 02:11:57,749 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-11 02:11:57,749 INFO  L470      AbstractCegarLoop]: Abstraction has 14 states and 16 transitions.
[2022-01-11 02:11:57,749 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 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)
[2022-01-11 02:11:57,749 INFO  L276                IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions.
[2022-01-11 02:11:57,749 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 9
[2022-01-11 02:11:57,749 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-11 02:11:57,749 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-11 02:11:57,773 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2022-01-11 02:11:57,972 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-11 02:11:57,972 INFO  L402      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-11 02:11:57,973 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-11 02:11:57,973 INFO  L85        PathProgramCache]: Analyzing trace with hash -1195451252, now seen corresponding path program 1 times
[2022-01-11 02:11:57,973 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-11 02:11:57,973 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872693926]
[2022-01-11 02:11:57,973 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-11 02:11:57,974 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-11 02:11:57,985 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-11 02:11:58,010 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-11 02:11:58,010 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-11 02:11:58,010 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872693926]
[2022-01-11 02:11:58,010 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872693926] provided 0 perfect and 1 imperfect interpolant sequences
[2022-01-11 02:11:58,010 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504157469]
[2022-01-11 02:11:58,011 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-11 02:11:58,011 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-11 02:11:58,011 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-11 02:11:58,012 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)
[2022-01-11 02:11:58,013 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2022-01-11 02:11:58,054 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-11 02:11:58,055 INFO  L263         TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core
[2022-01-11 02:11:58,056 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-11 02:11:58,129 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-11 02:11:58,129 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-01-11 02:11:58,181 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-11 02:11:58,181 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [504157469] provided 0 perfect and 2 imperfect interpolant sequences
[2022-01-11 02:11:58,182 INFO  L186   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-01-11 02:11:58,182 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7
[2022-01-11 02:11:58,182 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61984357]
[2022-01-11 02:11:58,182 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-01-11 02:11:58,182 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2022-01-11 02:11:58,182 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-11 02:11:58,183 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2022-01-11 02:11:58,183 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42
[2022-01-11 02:11:58,183 INFO  L87              Difference]: Start difference. First operand 14 states and 16 transitions. Second operand  has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 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)
[2022-01-11 02:11:58,231 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-11 02:11:58,231 INFO  L93              Difference]: Finished difference Result 22 states and 25 transitions.
[2022-01-11 02:11:58,232 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2022-01-11 02:11:58,232 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 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
[2022-01-11 02:11:58,232 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-11 02:11:58,232 INFO  L225             Difference]: With dead ends: 22
[2022-01-11 02:11:58,232 INFO  L226             Difference]: Without dead ends: 15
[2022-01-11 02:11:58,233 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56
[2022-01-11 02:11:58,233 INFO  L933         BasicCegarLoop]: 7 mSDtfsCounter, 7 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-01-11 02:11:58,234 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 18 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-01-11 02:11:58,234 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 15 states.
[2022-01-11 02:11:58,236 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15.
[2022-01-11 02:11:58,236 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 15 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 14 states have internal predecessors, (16), 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)
[2022-01-11 02:11:58,237 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions.
[2022-01-11 02:11:58,237 INFO  L78                 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 8
[2022-01-11 02:11:58,237 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-11 02:11:58,237 INFO  L470      AbstractCegarLoop]: Abstraction has 15 states and 16 transitions.
[2022-01-11 02:11:58,237 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 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)
[2022-01-11 02:11:58,237 INFO  L276                IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions.
[2022-01-11 02:11:58,238 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10
[2022-01-11 02:11:58,238 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-11 02:11:58,238 INFO  L514         BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1]
[2022-01-11 02:11:58,261 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0
[2022-01-11 02:11:58,452 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-11 02:11:58,452 INFO  L402      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-11 02:11:58,453 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-11 02:11:58,453 INFO  L85        PathProgramCache]: Analyzing trace with hash 1596544135, now seen corresponding path program 2 times
[2022-01-11 02:11:58,453 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-11 02:11:58,453 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305364237]
[2022-01-11 02:11:58,453 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-11 02:11:58,453 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-11 02:11:58,486 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-11 02:11:58,565 INFO  L134       CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-11 02:11:58,565 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-11 02:11:58,566 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305364237]
[2022-01-11 02:11:58,566 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305364237] provided 0 perfect and 1 imperfect interpolant sequences
[2022-01-11 02:11:58,566 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353805223]
[2022-01-11 02:11:58,566 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2022-01-11 02:11:58,566 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-11 02:11:58,566 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-11 02:11:58,567 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)
[2022-01-11 02:11:58,568 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2022-01-11 02:11:58,624 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2022-01-11 02:11:58,625 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-01-11 02:11:58,626 INFO  L263         TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 18 conjunts are in the unsatisfiable core
[2022-01-11 02:11:58,627 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-11 02:11:58,910 INFO  L134       CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-11 02:11:58,911 INFO  L328         TraceCheckSpWp]: Computing backward predicates...