/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_NONE.epf -i ../../../trunk/examples/svcomp/loop-invariants/linear-inequality-inv-a.c


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


This is Ultimate 0.2.2-dev-a10ec3b
[2022-01-10 20:24:16,370 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2022-01-10 20:24:16,371 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
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[2022-01-10 20:24:16,407 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2022-01-10 20:24:16,408 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2022-01-10 20:24:16,408 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2022-01-10 20:24:16,409 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2022-01-10 20:24:16,409 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2022-01-10 20:24:16,416 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2022-01-10 20:24:16,420 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2022-01-10 20:24:16,421 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2022-01-10 20:24:16,421 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2022-01-10 20:24:16,422 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2022-01-10 20:24:16,423 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2022-01-10 20:24:16,427 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
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[2022-01-10 20:24:16,428 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2022-01-10 20:24:16,428 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2022-01-10 20:24:16,429 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2022-01-10 20:24:16,429 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2022-01-10 20:24:16,430 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2022-01-10 20:24:16,431 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2022-01-10 20:24:16,432 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2022-01-10 20:24:16,433 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2022-01-10 20:24:16,434 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2022-01-10 20:24:16,434 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
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[2022-01-10 20:24:16,434 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2022-01-10 20:24:16,435 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2022-01-10 20:24:16,436 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_NONE.epf
[2022-01-10 20:24:16,478 INFO  L113        SettingsManager]: Loading preferences was successful
[2022-01-10 20:24:16,478 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2022-01-10 20:24:16,479 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2022-01-10 20:24:16,479 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2022-01-10 20:24:16,479 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2022-01-10 20:24:16,480 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2022-01-10 20:24:16,480 INFO  L138        SettingsManager]:  * Use SBE=true
[2022-01-10 20:24:16,480 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2022-01-10 20:24:16,480 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2022-01-10 20:24:16,480 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2022-01-10 20:24:16,480 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2022-01-10 20:24:16,480 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2022-01-10 20:24:16,480 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2022-01-10 20:24:16,480 INFO  L138        SettingsManager]:  * Adapt memory model on pointer casts if necessary=true
[2022-01-10 20:24:16,480 INFO  L138        SettingsManager]:  * Use bitvectors instead of ints=true
[2022-01-10 20:24:16,480 INFO  L138        SettingsManager]:  * Memory model=HoenickeLindenmann_4ByteResolution
[2022-01-10 20:24:16,480 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2022-01-10 20:24:16,481 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2022-01-10 20:24:16,481 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2022-01-10 20:24:16,481 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2022-01-10 20:24:16,481 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2022-01-10 20:24:16,481 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-01-10 20:24:16,481 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2022-01-10 20:24:16,481 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2022-01-10 20:24:16,481 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2022-01-10 20:24:16,481 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2022-01-10 20:24:16,481 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2022-01-10 20:24:16,481 INFO  L138        SettingsManager]:  * Large block encoding in concurrent analysis=OFF
[2022-01-10 20:24:16,481 INFO  L138        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2022-01-10 20:24:16,482 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2022-01-10 20:24:16,482 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2022-01-10 20:24:16,482 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2022-01-10 20:24:16,482 INFO  L136        SettingsManager]: Preferences of IcfgTransformer differ from their defaults:
[2022-01-10 20:24:16,482 INFO  L138        SettingsManager]:  * TransformationType=BV_TO_INT_NONE
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int)
WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN;
[2022-01-10 20:24:16,678 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2022-01-10 20:24:16,691 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2022-01-10 20:24:16,693 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2022-01-10 20:24:16,694 INFO  L271        PluginConnector]: Initializing CDTParser...
[2022-01-10 20:24:16,695 INFO  L275        PluginConnector]: CDTParser initialized
[2022-01-10 20:24:16,696 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invariants/linear-inequality-inv-a.c
[2022-01-10 20:24:16,733 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b19f7778f/9ac821ba9d754784986e8501c5c91c51/FLAG3a713968d
[2022-01-10 20:24:17,100 INFO  L306              CDTParser]: Found 1 translation units.
[2022-01-10 20:24:17,101 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invariants/linear-inequality-inv-a.c
[2022-01-10 20:24:17,104 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b19f7778f/9ac821ba9d754784986e8501c5c91c51/FLAG3a713968d
[2022-01-10 20:24:17,112 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b19f7778f/9ac821ba9d754784986e8501c5c91c51
[2022-01-10 20:24:17,114 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2022-01-10 20:24:17,115 INFO  L131        ToolchainWalker]: Walking toolchain with 6 elements.
[2022-01-10 20:24:17,119 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2022-01-10 20:24:17,119 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2022-01-10 20:24:17,121 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2022-01-10 20:24:17,122 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 08:24:17" (1/1) ...
[2022-01-10 20:24:17,122 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@323f1c40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:24:17, skipping insertion in model container
[2022-01-10 20:24:17,123 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 08:24:17" (1/1) ...
[2022-01-10 20:24:17,127 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2022-01-10 20:24:17,135 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2022-01-10 20:24:17,243 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]
[2022-01-10 20:24:17,245 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]
[2022-01-10 20:24:17,246 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-01-10 20:24:17,253 INFO  L203         MainTranslator]: Completed pre-run
[2022-01-10 20:24:17,268 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]
[2022-01-10 20:24:17,269 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]
[2022-01-10 20:24:17,269 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-01-10 20:24:17,278 INFO  L208         MainTranslator]: Completed translation
[2022-01-10 20:24:17,279 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:24:17 WrapperNode
[2022-01-10 20:24:17,279 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2022-01-10 20:24:17,280 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2022-01-10 20:24:17,280 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2022-01-10 20:24:17,280 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2022-01-10 20:24:17,287 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:24:17" (1/1) ...
[2022-01-10 20:24:17,292 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:24:17" (1/1) ...
[2022-01-10 20:24:17,305 INFO  L137                Inliner]: procedures = 11, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 38
[2022-01-10 20:24:17,306 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2022-01-10 20:24:17,306 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2022-01-10 20:24:17,306 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2022-01-10 20:24:17,306 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2022-01-10 20:24:17,311 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:24:17" (1/1) ...
[2022-01-10 20:24:17,312 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:24:17" (1/1) ...
[2022-01-10 20:24:17,314 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:24:17" (1/1) ...
[2022-01-10 20:24:17,315 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:24:17" (1/1) ...
[2022-01-10 20:24:17,320 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:24:17" (1/1) ...
[2022-01-10 20:24:17,323 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:24:17" (1/1) ...
[2022-01-10 20:24:17,323 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:24:17" (1/1) ...
[2022-01-10 20:24:17,325 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2022-01-10 20:24:17,325 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2022-01-10 20:24:17,325 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2022-01-10 20:24:17,326 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2022-01-10 20:24:17,327 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:24:17" (1/1) ...
[2022-01-10 20:24:17,333 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-01-10 20:24:17,340 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-10 20:24:17,348 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2022-01-10 20:24:17,372 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2022-01-10 20:24:17,373 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2022-01-10 20:24:17,373 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2022-01-10 20:24:17,373 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1
[2022-01-10 20:24:17,374 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2022-01-10 20:24:17,418 INFO  L234             CfgBuilder]: Building ICFG
[2022-01-10 20:24:17,422 INFO  L260             CfgBuilder]: Building CFG for each procedure with an implementation
[2022-01-10 20:24:17,532 INFO  L275             CfgBuilder]: Performing block encoding
[2022-01-10 20:24:17,536 INFO  L294             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2022-01-10 20:24:17,536 INFO  L299             CfgBuilder]: Removed 1 assume(true) statements.
[2022-01-10 20:24:17,537 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 08:24:17 BoogieIcfgContainer
[2022-01-10 20:24:17,537 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2022-01-10 20:24:17,538 INFO  L113        PluginConnector]: ------------------------IcfgTransformer----------------------------
[2022-01-10 20:24:17,538 INFO  L271        PluginConnector]: Initializing IcfgTransformer...
[2022-01-10 20:24:17,539 INFO  L275        PluginConnector]: IcfgTransformer initialized
[2022-01-10 20:24:17,541 INFO  L185        PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 08:24:17" (1/1) ...
[2022-01-10 20:24:17,611 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 08:24:17 BasicIcfg
[2022-01-10 20:24:17,612 INFO  L132        PluginConnector]: ------------------------ END IcfgTransformer----------------------------
[2022-01-10 20:24:17,612 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2022-01-10 20:24:17,613 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2022-01-10 20:24:17,614 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2022-01-10 20:24:17,614 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 08:24:17" (1/4) ...
[2022-01-10 20:24:17,615 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78e0c1e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 08:24:17, skipping insertion in model container
[2022-01-10 20:24:17,615 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:24:17" (2/4) ...
[2022-01-10 20:24:17,615 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78e0c1e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 08:24:17, skipping insertion in model container
[2022-01-10 20:24:17,615 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 08:24:17" (3/4) ...
[2022-01-10 20:24:17,616 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78e0c1e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 08:24:17, skipping insertion in model container
[2022-01-10 20:24:17,616 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 08:24:17" (4/4) ...
[2022-01-10 20:24:17,616 INFO  L111   eAbstractionObserver]: Analyzing ICFG linear-inequality-inv-a.cTransformedIcfg
[2022-01-10 20:24:17,619 INFO  L204   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2022-01-10 20:24:17,619 INFO  L163   ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations.
[2022-01-10 20:24:17,669 INFO  L338      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2022-01-10 20:24:17,674 INFO  L339      AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR
[2022-01-10 20:24:17,675 INFO  L340      AbstractCegarLoop]: Starting to check reachability of 2 error locations.
[2022-01-10 20:24:17,686 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)
[2022-01-10 20:24:17,689 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 7
[2022-01-10 20:24:17,689 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 20:24:17,690 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1]
[2022-01-10 20:24:17,690 INFO  L402      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 20:24:17,693 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 20:24:17,694 INFO  L85        PathProgramCache]: Analyzing trace with hash 1983109542, now seen corresponding path program 1 times
[2022-01-10 20:24:17,701 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 20:24:17,702 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737856654]
[2022-01-10 20:24:17,702 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 20:24:17,703 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 20:24:17,783 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 20:24:17,827 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 20:24:17,828 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 20:24:17,828 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737856654]
[2022-01-10 20:24:17,829 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737856654] provided 1 perfect and 0 imperfect interpolant sequences
[2022-01-10 20:24:17,829 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-01-10 20:24:17,829 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2022-01-10 20:24:17,830 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183927265]
[2022-01-10 20:24:17,831 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-10 20:24:17,834 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 2 states
[2022-01-10 20:24:17,834 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-10 20:24:17,857 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2022-01-10 20:24:17,857 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2022-01-10 20:24:17,859 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)
[2022-01-10 20:24:17,867 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 20:24:17,868 INFO  L93              Difference]: Finished difference Result 22 states and 27 transitions.
[2022-01-10 20:24:17,869 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. 
[2022-01-10 20:24:17,870 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
[2022-01-10 20:24:17,871 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 20:24:17,875 INFO  L225             Difference]: With dead ends: 22
[2022-01-10 20:24:17,875 INFO  L226             Difference]: Without dead ends: 10
[2022-01-10 20:24:17,877 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
[2022-01-10 20:24:17,880 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
[2022-01-10 20:24:17,882 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]
[2022-01-10 20:24:17,893 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10 states.
[2022-01-10 20:24:17,905 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10.
[2022-01-10 20:24:17,905 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)
[2022-01-10 20:24:17,906 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions.
[2022-01-10 20:24:17,907 INFO  L78                 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 6
[2022-01-10 20:24:17,907 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 20:24:17,907 INFO  L470      AbstractCegarLoop]: Abstraction has 10 states and 10 transitions.
[2022-01-10 20:24:17,908 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)
[2022-01-10 20:24:17,909 INFO  L276                IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions.
[2022-01-10 20:24:17,909 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 7
[2022-01-10 20:24:17,909 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 20:24:17,909 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1]
[2022-01-10 20:24:17,909 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2022-01-10 20:24:17,910 INFO  L402      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 20:24:17,912 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 20:24:17,912 INFO  L85        PathProgramCache]: Analyzing trace with hash 1983110503, now seen corresponding path program 1 times
[2022-01-10 20:24:17,913 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 20:24:17,913 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324277022]
[2022-01-10 20:24:17,913 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 20:24:17,913 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 20:24:17,934 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 20:24:17,984 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 20:24:17,984 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 20:24:17,984 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324277022]
[2022-01-10 20:24:17,984 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324277022] provided 1 perfect and 0 imperfect interpolant sequences
[2022-01-10 20:24:17,984 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-01-10 20:24:17,984 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2022-01-10 20:24:17,984 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719122724]
[2022-01-10 20:24:17,985 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-10 20:24:17,985 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-01-10 20:24:17,985 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-10 20:24:17,986 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-01-10 20:24:17,986 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-01-10 20:24:17,986 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)
[2022-01-10 20:24:18,011 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 20:24:18,011 INFO  L93              Difference]: Finished difference Result 17 states and 17 transitions.
[2022-01-10 20:24:18,012 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-01-10 20:24:18,012 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
[2022-01-10 20:24:18,012 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 20:24:18,012 INFO  L225             Difference]: With dead ends: 17
[2022-01-10 20:24:18,012 INFO  L226             Difference]: Without dead ends: 15
[2022-01-10 20:24:18,013 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
[2022-01-10 20:24:18,014 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
[2022-01-10 20:24:18,014 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]
[2022-01-10 20:24:18,015 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 15 states.
[2022-01-10 20:24:18,016 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 12.
[2022-01-10 20:24:18,016 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)
[2022-01-10 20:24:18,016 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions.
[2022-01-10 20:24:18,017 INFO  L78                 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 6
[2022-01-10 20:24:18,017 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 20:24:18,017 INFO  L470      AbstractCegarLoop]: Abstraction has 12 states and 13 transitions.
[2022-01-10 20:24:18,017 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)
[2022-01-10 20:24:18,017 INFO  L276                IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions.
[2022-01-10 20:24:18,017 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8
[2022-01-10 20:24:18,017 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 20:24:18,017 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1]
[2022-01-10 20:24:18,017 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2022-01-10 20:24:18,018 INFO  L402      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 20:24:18,018 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 20:24:18,018 INFO  L85        PathProgramCache]: Analyzing trace with hash 1346884524, now seen corresponding path program 1 times
[2022-01-10 20:24:18,018 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 20:24:18,018 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041319233]
[2022-01-10 20:24:18,018 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 20:24:18,019 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 20:24:18,027 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 20:24:18,052 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 20:24:18,053 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 20:24:18,053 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041319233]
[2022-01-10 20:24:18,053 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041319233] provided 1 perfect and 0 imperfect interpolant sequences
[2022-01-10 20:24:18,053 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-01-10 20:24:18,053 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2022-01-10 20:24:18,053 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080357852]
[2022-01-10 20:24:18,053 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-10 20:24:18,054 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-01-10 20:24:18,054 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-10 20:24:18,054 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-01-10 20:24:18,054 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-01-10 20:24:18,054 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)
[2022-01-10 20:24:18,063 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 20:24:18,063 INFO  L93              Difference]: Finished difference Result 15 states and 15 transitions.
[2022-01-10 20:24:18,064 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-01-10 20:24:18,064 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
[2022-01-10 20:24:18,064 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 20:24:18,064 INFO  L225             Difference]: With dead ends: 15
[2022-01-10 20:24:18,064 INFO  L226             Difference]: Without dead ends: 11
[2022-01-10 20:24:18,065 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
[2022-01-10 20:24:18,066 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
[2022-01-10 20:24:18,066 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]
[2022-01-10 20:24:18,066 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 11 states.
[2022-01-10 20:24:18,068 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11.
[2022-01-10 20:24:18,068 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)
[2022-01-10 20:24:18,068 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions.
[2022-01-10 20:24:18,068 INFO  L78                 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 7
[2022-01-10 20:24:18,068 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 20:24:18,068 INFO  L470      AbstractCegarLoop]: Abstraction has 11 states and 11 transitions.
[2022-01-10 20:24:18,068 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)
[2022-01-10 20:24:18,069 INFO  L276                IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions.
[2022-01-10 20:24:18,069 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8
[2022-01-10 20:24:18,069 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 20:24:18,069 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1]
[2022-01-10 20:24:18,069 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2022-01-10 20:24:18,069 INFO  L402      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 20:24:18,070 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 20:24:18,070 INFO  L85        PathProgramCache]: Analyzing trace with hash 1346910343, now seen corresponding path program 1 times
[2022-01-10 20:24:18,070 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 20:24:18,070 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230482300]
[2022-01-10 20:24:18,070 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 20:24:18,070 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 20:24:18,098 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 20:24:18,150 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 20:24:18,151 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 20:24:18,151 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230482300]
[2022-01-10 20:24:18,151 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230482300] provided 0 perfect and 1 imperfect interpolant sequences
[2022-01-10 20:24:18,151 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391600393]
[2022-01-10 20:24:18,151 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 20:24:18,152 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-10 20:24:18,152 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-10 20:24:18,153 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)
[2022-01-10 20:24:18,155 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2022-01-10 20:24:18,202 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 20:24:18,203 INFO  L263         TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core
[2022-01-10 20:24:18,207 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 20:24:18,387 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 20:24:18,387 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-01-10 20:24:18,461 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 20:24:18,461 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [391600393] provided 0 perfect and 2 imperfect interpolant sequences
[2022-01-10 20:24:18,461 INFO  L186   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-01-10 20:24:18,462 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6
[2022-01-10 20:24:18,462 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641155037]
[2022-01-10 20:24:18,462 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-01-10 20:24:18,462 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2022-01-10 20:24:18,462 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-10 20:24:18,463 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2022-01-10 20:24:18,463 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2022-01-10 20:24:18,463 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)
[2022-01-10 20:24:18,549 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 20:24:18,550 INFO  L93              Difference]: Finished difference Result 20 states and 22 transitions.
[2022-01-10 20:24:18,550 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2022-01-10 20:24:18,550 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
[2022-01-10 20:24:18,550 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 20:24:18,551 INFO  L225             Difference]: With dead ends: 20
[2022-01-10 20:24:18,551 INFO  L226             Difference]: Without dead ends: 18
[2022-01-10 20:24:18,552 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
[2022-01-10 20:24:18,559 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
[2022-01-10 20:24:18,560 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]
[2022-01-10 20:24:18,563 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 18 states.
[2022-01-10 20:24:18,567 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 14.
[2022-01-10 20:24:18,568 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)
[2022-01-10 20:24:18,568 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions.
[2022-01-10 20:24:18,569 INFO  L78                 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 7
[2022-01-10 20:24:18,569 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 20:24:18,570 INFO  L470      AbstractCegarLoop]: Abstraction has 14 states and 16 transitions.
[2022-01-10 20:24:18,570 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)
[2022-01-10 20:24:18,570 INFO  L276                IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions.
[2022-01-10 20:24:18,570 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 9
[2022-01-10 20:24:18,570 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 20:24:18,570 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 20:24:18,589 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2022-01-10 20:24:18,776 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
[2022-01-10 20:24:18,777 INFO  L402      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 20:24:18,777 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 20:24:18,777 INFO  L85        PathProgramCache]: Analyzing trace with hash -1195451252, now seen corresponding path program 1 times
[2022-01-10 20:24:18,777 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 20:24:18,777 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364755605]
[2022-01-10 20:24:18,778 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 20:24:18,778 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 20:24:18,787 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 20:24:18,819 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 20:24:18,819 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 20:24:18,819 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364755605]
[2022-01-10 20:24:18,819 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364755605] provided 0 perfect and 1 imperfect interpolant sequences
[2022-01-10 20:24:18,820 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527710980]
[2022-01-10 20:24:18,820 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 20:24:18,820 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-10 20:24:18,820 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-10 20:24:18,844 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)
[2022-01-10 20:24:18,845 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2022-01-10 20:24:18,882 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 20:24:18,883 INFO  L263         TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core
[2022-01-10 20:24:18,884 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 20:24:18,982 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 20:24:18,982 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-01-10 20:24:19,064 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 20:24:19,065 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [527710980] provided 0 perfect and 2 imperfect interpolant sequences
[2022-01-10 20:24:19,069 INFO  L186   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-01-10 20:24:19,069 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7
[2022-01-10 20:24:19,070 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424509893]
[2022-01-10 20:24:19,070 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-01-10 20:24:19,071 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2022-01-10 20:24:19,071 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-10 20:24:19,071 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2022-01-10 20:24:19,072 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42
[2022-01-10 20:24:19,072 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)
[2022-01-10 20:24:19,136 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 20:24:19,136 INFO  L93              Difference]: Finished difference Result 22 states and 25 transitions.
[2022-01-10 20:24:19,136 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2022-01-10 20:24:19,137 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
[2022-01-10 20:24:19,137 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 20:24:19,137 INFO  L225             Difference]: With dead ends: 22
[2022-01-10 20:24:19,137 INFO  L226             Difference]: Without dead ends: 15
[2022-01-10 20:24:19,138 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
[2022-01-10 20:24:19,139 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
[2022-01-10 20:24:19,139 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]
[2022-01-10 20:24:19,140 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 15 states.
[2022-01-10 20:24:19,144 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15.
[2022-01-10 20:24:19,144 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)
[2022-01-10 20:24:19,145 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions.
[2022-01-10 20:24:19,145 INFO  L78                 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 8
[2022-01-10 20:24:19,145 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 20:24:19,145 INFO  L470      AbstractCegarLoop]: Abstraction has 15 states and 16 transitions.
[2022-01-10 20:24:19,145 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)
[2022-01-10 20:24:19,145 INFO  L276                IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions.
[2022-01-10 20:24:19,146 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10
[2022-01-10 20:24:19,146 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 20:24:19,146 INFO  L514         BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1]
[2022-01-10 20:24:19,162 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0
[2022-01-10 20:24:19,351 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
[2022-01-10 20:24:19,351 INFO  L402      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 20:24:19,352 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 20:24:19,352 INFO  L85        PathProgramCache]: Analyzing trace with hash 1596544135, now seen corresponding path program 2 times
[2022-01-10 20:24:19,352 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 20:24:19,352 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601140439]
[2022-01-10 20:24:19,352 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 20:24:19,352 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 20:24:19,414 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 20:24:19,469 INFO  L134       CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 20:24:19,469 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 20:24:19,472 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601140439]
[2022-01-10 20:24:19,472 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601140439] provided 0 perfect and 1 imperfect interpolant sequences
[2022-01-10 20:24:19,472 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498499715]
[2022-01-10 20:24:19,472 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2022-01-10 20:24:19,472 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-10 20:24:19,472 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-10 20:24:19,473 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)
[2022-01-10 20:24:19,474 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2022-01-10 20:24:19,522 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2022-01-10 20:24:19,523 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-01-10 20:24:19,524 INFO  L263         TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 18 conjunts are in the unsatisfiable core
[2022-01-10 20:24:19,525 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 20:24:19,784 INFO  L134       CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 20:24:19,784 INFO  L328         TraceCheckSpWp]: Computing backward predicates...