/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/array-crafted/zero_sum2.c


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


This is Ultimate 0.2.2-dev-a10ec3b
[2022-01-10 21:23:06,604 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2022-01-10 21:23:06,606 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2022-01-10 21:23:06,626 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2022-01-10 21:23:06,626 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2022-01-10 21:23:06,627 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2022-01-10 21:23:06,628 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2022-01-10 21:23:06,629 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2022-01-10 21:23:06,630 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2022-01-10 21:23:06,631 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2022-01-10 21:23:06,632 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2022-01-10 21:23:06,661 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2022-01-10 21:23:06,661 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2022-01-10 21:23:06,662 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2022-01-10 21:23:06,663 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2022-01-10 21:23:06,669 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2022-01-10 21:23:06,670 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2022-01-10 21:23:06,677 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2022-01-10 21:23:06,678 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2022-01-10 21:23:06,679 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2022-01-10 21:23:06,680 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2022-01-10 21:23:06,681 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2022-01-10 21:23:06,682 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2022-01-10 21:23:06,683 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2022-01-10 21:23:06,684 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2022-01-10 21:23:06,684 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2022-01-10 21:23:06,685 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2022-01-10 21:23:06,685 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2022-01-10 21:23:06,685 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2022-01-10 21:23:06,686 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2022-01-10 21:23:06,686 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2022-01-10 21:23:06,687 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2022-01-10 21:23:06,687 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2022-01-10 21:23:06,687 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2022-01-10 21:23:06,688 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2022-01-10 21:23:06,688 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2022-01-10 21:23:06,689 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2022-01-10 21:23:06,689 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2022-01-10 21:23:06,689 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2022-01-10 21:23:06,689 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2022-01-10 21:23:06,690 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2022-01-10 21:23:06,704 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 21:23:06,730 INFO  L113        SettingsManager]: Loading preferences was successful
[2022-01-10 21:23:06,730 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2022-01-10 21:23:06,731 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2022-01-10 21:23:06,731 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2022-01-10 21:23:06,734 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2022-01-10 21:23:06,734 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2022-01-10 21:23:06,734 INFO  L138        SettingsManager]:  * Use SBE=true
[2022-01-10 21:23:06,735 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2022-01-10 21:23:06,735 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2022-01-10 21:23:06,735 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2022-01-10 21:23:06,736 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2022-01-10 21:23:06,736 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2022-01-10 21:23:06,736 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2022-01-10 21:23:06,736 INFO  L138        SettingsManager]:  * Adapt memory model on pointer casts if necessary=true
[2022-01-10 21:23:06,736 INFO  L138        SettingsManager]:  * Use bitvectors instead of ints=true
[2022-01-10 21:23:06,736 INFO  L138        SettingsManager]:  * Memory model=HoenickeLindenmann_4ByteResolution
[2022-01-10 21:23:06,737 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2022-01-10 21:23:06,737 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2022-01-10 21:23:06,737 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2022-01-10 21:23:06,737 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2022-01-10 21:23:06,737 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2022-01-10 21:23:06,737 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-01-10 21:23:06,737 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2022-01-10 21:23:06,737 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2022-01-10 21:23:06,737 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2022-01-10 21:23:06,738 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2022-01-10 21:23:06,738 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2022-01-10 21:23:06,738 INFO  L138        SettingsManager]:  * Large block encoding in concurrent analysis=OFF
[2022-01-10 21:23:06,738 INFO  L138        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2022-01-10 21:23:06,738 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2022-01-10 21:23:06,738 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2022-01-10 21:23:06,738 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2022-01-10 21:23:06,740 INFO  L136        SettingsManager]: Preferences of IcfgTransformer differ from their defaults:
[2022-01-10 21:23:06,740 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN;
[2022-01-10 21:23:06,933 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2022-01-10 21:23:06,951 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2022-01-10 21:23:06,954 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2022-01-10 21:23:06,955 INFO  L271        PluginConnector]: Initializing CDTParser...
[2022-01-10 21:23:06,955 INFO  L275        PluginConnector]: CDTParser initialized
[2022-01-10 21:23:06,956 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum2.c
[2022-01-10 21:23:07,029 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/365d4c4d9/bc6e35c371194b8fa2f396f379e0c86b/FLAGe2258628a
[2022-01-10 21:23:07,391 INFO  L306              CDTParser]: Found 1 translation units.
[2022-01-10 21:23:07,392 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum2.c
[2022-01-10 21:23:07,396 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/365d4c4d9/bc6e35c371194b8fa2f396f379e0c86b/FLAGe2258628a
[2022-01-10 21:23:07,416 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/365d4c4d9/bc6e35c371194b8fa2f396f379e0c86b
[2022-01-10 21:23:07,418 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2022-01-10 21:23:07,420 INFO  L131        ToolchainWalker]: Walking toolchain with 6 elements.
[2022-01-10 21:23:07,421 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2022-01-10 21:23:07,421 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2022-01-10 21:23:07,423 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2022-01-10 21:23:07,424 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 09:23:07" (1/1) ...
[2022-01-10 21:23:07,424 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c30e2aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:23:07, skipping insertion in model container
[2022-01-10 21:23:07,424 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 09:23:07" (1/1) ...
[2022-01-10 21:23:07,429 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2022-01-10 21:23:07,438 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2022-01-10 21:23:07,559 WARN  L230   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum2.c[400,413]
[2022-01-10 21:23:07,581 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-01-10 21:23:07,592 INFO  L203         MainTranslator]: Completed pre-run
[2022-01-10 21:23:07,601 WARN  L230   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum2.c[400,413]
[2022-01-10 21:23:07,608 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-01-10 21:23:07,619 INFO  L208         MainTranslator]: Completed translation
[2022-01-10 21:23:07,619 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:23:07 WrapperNode
[2022-01-10 21:23:07,619 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2022-01-10 21:23:07,620 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2022-01-10 21:23:07,620 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2022-01-10 21:23:07,620 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2022-01-10 21:23:07,626 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:23:07" (1/1) ...
[2022-01-10 21:23:07,632 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:23:07" (1/1) ...
[2022-01-10 21:23:07,646 INFO  L137                Inliner]: procedures = 17, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 81
[2022-01-10 21:23:07,646 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2022-01-10 21:23:07,647 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2022-01-10 21:23:07,647 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2022-01-10 21:23:07,647 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2022-01-10 21:23:07,653 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:23:07" (1/1) ...
[2022-01-10 21:23:07,653 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:23:07" (1/1) ...
[2022-01-10 21:23:07,655 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:23:07" (1/1) ...
[2022-01-10 21:23:07,655 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:23:07" (1/1) ...
[2022-01-10 21:23:07,660 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:23:07" (1/1) ...
[2022-01-10 21:23:07,664 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:23:07" (1/1) ...
[2022-01-10 21:23:07,665 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:23:07" (1/1) ...
[2022-01-10 21:23:07,667 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2022-01-10 21:23:07,667 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2022-01-10 21:23:07,668 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2022-01-10 21:23:07,668 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2022-01-10 21:23:07,669 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:23:07" (1/1) ...
[2022-01-10 21:23:07,674 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-01-10 21:23:07,683 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-10 21:23:07,693 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 21:23:07,700 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 21:23:07,721 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2022-01-10 21:23:07,721 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1
[2022-01-10 21:23:07,721 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2022-01-10 21:23:07,722 INFO  L130     BoogieDeclarations]: Found specification of procedure read~intINTTYPE2
[2022-01-10 21:23:07,722 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2022-01-10 21:23:07,722 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2022-01-10 21:23:07,722 INFO  L130     BoogieDeclarations]: Found specification of procedure write~intINTTYPE2
[2022-01-10 21:23:07,722 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2022-01-10 21:23:07,762 INFO  L234             CfgBuilder]: Building ICFG
[2022-01-10 21:23:07,763 INFO  L260             CfgBuilder]: Building CFG for each procedure with an implementation
[2022-01-10 21:23:07,897 INFO  L275             CfgBuilder]: Performing block encoding
[2022-01-10 21:23:07,901 INFO  L294             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2022-01-10 21:23:07,901 INFO  L299             CfgBuilder]: Removed 5 assume(true) statements.
[2022-01-10 21:23:07,903 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 09:23:07 BoogieIcfgContainer
[2022-01-10 21:23:07,903 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2022-01-10 21:23:07,903 INFO  L113        PluginConnector]: ------------------------IcfgTransformer----------------------------
[2022-01-10 21:23:07,903 INFO  L271        PluginConnector]: Initializing IcfgTransformer...
[2022-01-10 21:23:07,908 INFO  L275        PluginConnector]: IcfgTransformer initialized
[2022-01-10 21:23:07,910 INFO  L185        PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 09:23:07" (1/1) ...
[2022-01-10 21:23:08,096 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 09:23:08 BasicIcfg
[2022-01-10 21:23:08,096 INFO  L132        PluginConnector]: ------------------------ END IcfgTransformer----------------------------
[2022-01-10 21:23:08,097 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2022-01-10 21:23:08,097 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2022-01-10 21:23:08,099 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2022-01-10 21:23:08,099 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 09:23:07" (1/4) ...
[2022-01-10 21:23:08,100 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@718bae0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 09:23:08, skipping insertion in model container
[2022-01-10 21:23:08,100 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:23:07" (2/4) ...
[2022-01-10 21:23:08,100 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@718bae0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 09:23:08, skipping insertion in model container
[2022-01-10 21:23:08,100 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 09:23:07" (3/4) ...
[2022-01-10 21:23:08,101 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@718bae0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 09:23:08, skipping insertion in model container
[2022-01-10 21:23:08,101 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 09:23:08" (4/4) ...
[2022-01-10 21:23:08,101 INFO  L111   eAbstractionObserver]: Analyzing ICFG zero_sum2.cTransformedIcfg
[2022-01-10 21:23:08,105 INFO  L204   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2022-01-10 21:23:08,105 INFO  L163   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2022-01-10 21:23:08,145 INFO  L338      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2022-01-10 21:23:08,149 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 21:23:08,150 INFO  L340      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2022-01-10 21:23:08,164 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 26 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 21:23:08,167 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 16
[2022-01-10 21:23:08,168 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 21:23:08,168 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 21:23:08,168 INFO  L402      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 21:23:08,172 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 21:23:08,172 INFO  L85        PathProgramCache]: Analyzing trace with hash 854319152, now seen corresponding path program 1 times
[2022-01-10 21:23:08,177 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 21:23:08,177 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103119894]
[2022-01-10 21:23:08,177 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 21:23:08,178 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 21:23:08,282 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 21:23:08,355 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 21:23:08,356 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 21:23:08,357 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103119894]
[2022-01-10 21:23:08,358 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103119894] provided 1 perfect and 0 imperfect interpolant sequences
[2022-01-10 21:23:08,358 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-01-10 21:23:08,358 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2022-01-10 21:23:08,360 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927944303]
[2022-01-10 21:23:08,362 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-10 21:23:08,366 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 2 states
[2022-01-10 21:23:08,366 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-10 21:23:08,397 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2022-01-10 21:23:08,399 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2022-01-10 21:23:08,400 INFO  L87              Difference]: Start difference. First operand  has 26 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand  has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 21:23:08,411 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 21:23:08,411 INFO  L93              Difference]: Finished difference Result 47 states and 66 transitions.
[2022-01-10 21:23:08,412 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. 
[2022-01-10 21:23:08,413 INFO  L78                 Accepts]: Start accepts. Automaton has  has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15
[2022-01-10 21:23:08,413 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 21:23:08,418 INFO  L225             Difference]: With dead ends: 47
[2022-01-10 21:23:08,418 INFO  L226             Difference]: Without dead ends: 21
[2022-01-10 21:23:08,420 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 21:23:08,423 INFO  L933         BasicCegarLoop]: 31 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, 31 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 21:23:08,424 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-01-10 21:23:08,438 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 21 states.
[2022-01-10 21:23:08,446 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21.
[2022-01-10 21:23:08,447 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 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 21:23:08,448 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions.
[2022-01-10 21:23:08,449 INFO  L78                 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 15
[2022-01-10 21:23:08,449 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 21:23:08,449 INFO  L470      AbstractCegarLoop]: Abstraction has 21 states and 25 transitions.
[2022-01-10 21:23:08,449 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 21:23:08,450 INFO  L276                IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions.
[2022-01-10 21:23:08,450 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 16
[2022-01-10 21:23:08,450 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 21:23:08,450 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 21:23:08,450 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2022-01-10 21:23:08,451 INFO  L402      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 21:23:08,451 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 21:23:08,451 INFO  L85        PathProgramCache]: Analyzing trace with hash -1736609653, now seen corresponding path program 1 times
[2022-01-10 21:23:08,452 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 21:23:08,452 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472417052]
[2022-01-10 21:23:08,452 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 21:23:08,452 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 21:23:08,491 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 21:23:08,529 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 21:23:08,530 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 21:23:08,530 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472417052]
[2022-01-10 21:23:08,530 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472417052] provided 1 perfect and 0 imperfect interpolant sequences
[2022-01-10 21:23:08,530 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-01-10 21:23:08,530 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2022-01-10 21:23:08,530 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178536022]
[2022-01-10 21:23:08,531 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-10 21:23:08,531 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2022-01-10 21:23:08,532 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-10 21:23:08,532 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2022-01-10 21:23:08,532 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2022-01-10 21:23:08,532 INFO  L87              Difference]: Start difference. First operand 21 states and 25 transitions. Second operand  has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 21:23:08,634 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 21:23:08,634 INFO  L93              Difference]: Finished difference Result 32 states and 39 transitions.
[2022-01-10 21:23:08,634 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2022-01-10 21:23:08,634 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15
[2022-01-10 21:23:08,635 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 21:23:08,635 INFO  L225             Difference]: With dead ends: 32
[2022-01-10 21:23:08,635 INFO  L226             Difference]: Without dead ends: 28
[2022-01-10 21:23:08,635 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2022-01-10 21:23:08,636 INFO  L933         BasicCegarLoop]: 20 mSDtfsCounter, 3 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-01-10 21:23:08,637 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 53 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-01-10 21:23:08,637 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 28 states.
[2022-01-10 21:23:08,640 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28.
[2022-01-10 21:23:08,640 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 28 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 27 states have internal predecessors, (35), 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 21:23:08,640 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions.
[2022-01-10 21:23:08,641 INFO  L78                 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 15
[2022-01-10 21:23:08,641 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 21:23:08,641 INFO  L470      AbstractCegarLoop]: Abstraction has 28 states and 35 transitions.
[2022-01-10 21:23:08,641 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 21:23:08,641 INFO  L276                IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions.
[2022-01-10 21:23:08,641 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 18
[2022-01-10 21:23:08,641 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 21:23:08,642 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 21:23:08,642 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2022-01-10 21:23:08,642 INFO  L402      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 21:23:08,642 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 21:23:08,642 INFO  L85        PathProgramCache]: Analyzing trace with hash -558116915, now seen corresponding path program 1 times
[2022-01-10 21:23:08,642 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 21:23:08,643 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977147639]
[2022-01-10 21:23:08,643 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 21:23:08,643 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 21:23:08,697 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 21:23:08,775 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-01-10 21:23:08,775 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 21:23:08,775 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977147639]
[2022-01-10 21:23:08,775 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977147639] provided 1 perfect and 0 imperfect interpolant sequences
[2022-01-10 21:23:08,775 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-01-10 21:23:08,775 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2022-01-10 21:23:08,776 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71820906]
[2022-01-10 21:23:08,776 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-10 21:23:08,776 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-01-10 21:23:08,776 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-10 21:23:08,776 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-01-10 21:23:08,776 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-01-10 21:23:08,777 INFO  L87              Difference]: Start difference. First operand 28 states and 35 transitions. Second operand  has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 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 21:23:08,870 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 21:23:08,870 INFO  L93              Difference]: Finished difference Result 53 states and 67 transitions.
[2022-01-10 21:23:08,871 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-01-10 21:23:08,871 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 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 17
[2022-01-10 21:23:08,871 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 21:23:08,872 INFO  L225             Difference]: With dead ends: 53
[2022-01-10 21:23:08,872 INFO  L226             Difference]: Without dead ends: 30
[2022-01-10 21:23:08,872 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 21:23:08,873 INFO  L933         BasicCegarLoop]: 23 mSDtfsCounter, 1 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-01-10 21:23:08,873 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 34 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-01-10 21:23:08,874 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 30 states.
[2022-01-10 21:23:08,876 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29.
[2022-01-10 21:23:08,876 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 29 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 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 21:23:08,877 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions.
[2022-01-10 21:23:08,877 INFO  L78                 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 17
[2022-01-10 21:23:08,877 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 21:23:08,877 INFO  L470      AbstractCegarLoop]: Abstraction has 29 states and 36 transitions.
[2022-01-10 21:23:08,877 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 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 21:23:08,878 INFO  L276                IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions.
[2022-01-10 21:23:08,878 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 20
[2022-01-10 21:23:08,878 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 21:23:08,878 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 21:23:08,878 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2022-01-10 21:23:08,878 INFO  L402      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 21:23:08,880 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 21:23:08,880 INFO  L85        PathProgramCache]: Analyzing trace with hash 1685014448, now seen corresponding path program 1 times
[2022-01-10 21:23:08,880 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 21:23:08,881 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689649677]
[2022-01-10 21:23:08,881 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 21:23:08,881 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 21:23:08,951 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 21:23:09,024 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2022-01-10 21:23:09,025 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 21:23:09,025 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689649677]
[2022-01-10 21:23:09,025 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689649677] provided 1 perfect and 0 imperfect interpolant sequences
[2022-01-10 21:23:09,025 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-01-10 21:23:09,026 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2022-01-10 21:23:09,026 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805560115]
[2022-01-10 21:23:09,026 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-10 21:23:09,026 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2022-01-10 21:23:09,026 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-10 21:23:09,027 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2022-01-10 21:23:09,027 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2022-01-10 21:23:09,028 INFO  L87              Difference]: Start difference. First operand 29 states and 36 transitions. Second operand  has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 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 21:23:09,160 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 21:23:09,161 INFO  L93              Difference]: Finished difference Result 48 states and 60 transitions.
[2022-01-10 21:23:09,162 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2022-01-10 21:23:09,162 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 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 19
[2022-01-10 21:23:09,163 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 21:23:09,163 INFO  L225             Difference]: With dead ends: 48
[2022-01-10 21:23:09,163 INFO  L226             Difference]: Without dead ends: 30
[2022-01-10 21:23:09,163 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2022-01-10 21:23:09,164 INFO  L933         BasicCegarLoop]: 11 mSDtfsCounter, 27 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-01-10 21:23:09,165 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 15 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-01-10 21:23:09,165 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 30 states.
[2022-01-10 21:23:09,170 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26.
[2022-01-10 21:23:09,170 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 26 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 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 21:23:09,171 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions.
[2022-01-10 21:23:09,171 INFO  L78                 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 19
[2022-01-10 21:23:09,172 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 21:23:09,173 INFO  L470      AbstractCegarLoop]: Abstraction has 26 states and 30 transitions.
[2022-01-10 21:23:09,173 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 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 21:23:09,173 INFO  L276                IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions.
[2022-01-10 21:23:09,174 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 26
[2022-01-10 21:23:09,174 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 21:23:09,174 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 21:23:09,175 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2022-01-10 21:23:09,175 INFO  L402      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 21:23:09,177 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 21:23:09,177 INFO  L85        PathProgramCache]: Analyzing trace with hash 275996567, now seen corresponding path program 1 times
[2022-01-10 21:23:09,177 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 21:23:09,187 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245179356]
[2022-01-10 21:23:09,188 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 21:23:09,188 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 21:23:09,262 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 21:23:09,319 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2022-01-10 21:23:09,320 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 21:23:09,320 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245179356]
[2022-01-10 21:23:09,320 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245179356] provided 0 perfect and 1 imperfect interpolant sequences
[2022-01-10 21:23:09,321 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866213006]
[2022-01-10 21:23:09,321 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 21:23:09,321 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-10 21:23:09,322 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-10 21:23:09,336 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 21:23:09,372 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 21:23:09,566 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 21:23:09,568 INFO  L263         TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 6 conjunts are in the unsatisfiable core
[2022-01-10 21:23:09,572 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 21:23:10,055 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2022-01-10 21:23:10,056 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-01-10 21:23:12,281 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2022-01-10 21:23:12,281 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866213006] provided 0 perfect and 2 imperfect interpolant sequences
[2022-01-10 21:23:12,281 INFO  L186   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-01-10 21:23:12,281 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6
[2022-01-10 21:23:12,282 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068819093]
[2022-01-10 21:23:12,282 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-01-10 21:23:12,282 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2022-01-10 21:23:12,282 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-10 21:23:12,283 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2022-01-10 21:23:12,283 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30
[2022-01-10 21:23:12,283 INFO  L87              Difference]: Start difference. First operand 26 states and 30 transitions. Second operand  has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 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 21:23:12,480 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 21:23:12,480 INFO  L93              Difference]: Finished difference Result 49 states and 57 transitions.
[2022-01-10 21:23:12,481 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2022-01-10 21:23:12,481 INFO  L78                 Accepts]: Start accepts. Automaton has  has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 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 25
[2022-01-10 21:23:12,481 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 21:23:12,482 INFO  L225             Difference]: With dead ends: 49
[2022-01-10 21:23:12,482 INFO  L226             Difference]: Without dead ends: 29
[2022-01-10 21:23:12,482 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30
[2022-01-10 21:23:12,483 INFO  L933         BasicCegarLoop]: 23 mSDtfsCounter, 2 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2022-01-10 21:23:12,483 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 67 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2022-01-10 21:23:12,483 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 29 states.
[2022-01-10 21:23:12,486 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28.
[2022-01-10 21:23:12,487 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 28 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 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 21:23:12,487 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions.
[2022-01-10 21:23:12,487 INFO  L78                 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 25
[2022-01-10 21:23:12,487 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 21:23:12,487 INFO  L470      AbstractCegarLoop]: Abstraction has 28 states and 32 transitions.
[2022-01-10 21:23:12,487 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 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 21:23:12,487 INFO  L276                IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions.
[2022-01-10 21:23:12,488 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 28
[2022-01-10 21:23:12,488 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 21:23:12,488 INFO  L514         BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 21:23:12,514 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0
[2022-01-10 21:23:12,695 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-10 21:23:12,696 INFO  L402      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 21:23:12,696 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 21:23:12,696 INFO  L85        PathProgramCache]: Analyzing trace with hash 2070824058, now seen corresponding path program 2 times
[2022-01-10 21:23:12,696 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 21:23:12,697 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108420959]
[2022-01-10 21:23:12,697 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 21:23:12,697 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 21:23:12,745 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 21:23:12,821 INFO  L134       CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked.
[2022-01-10 21:23:12,821 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 21:23:12,821 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108420959]
[2022-01-10 21:23:12,821 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108420959] provided 0 perfect and 1 imperfect interpolant sequences
[2022-01-10 21:23:12,821 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937004845]
[2022-01-10 21:23:12,821 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2022-01-10 21:23:12,822 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-10 21:23:12,822 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-10 21:23:12,823 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 21:23:12,858 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 21:23:12,933 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2022-01-10 21:23:12,933 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-01-10 21:23:12,935 INFO  L263         TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 10 conjunts are in the unsatisfiable core
[2022-01-10 21:23:12,937 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 21:23:13,486 INFO  L134       CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked.
[2022-01-10 21:23:13,486 INFO  L328         TraceCheckSpWp]: Computing backward predicates...