/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_LAZY.epf -i ../../../trunk/examples/svcomp/loops/sum04-1.i


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


This is Ultimate 0.2.2-dev-a10ec3b
[2022-01-10 14:21:18,548 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2022-01-10 14:21:18,549 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2022-01-10 14:21:18,578 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2022-01-10 14:21:18,578 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2022-01-10 14:21:18,579 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2022-01-10 14:21:18,580 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2022-01-10 14:21:18,594 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2022-01-10 14:21:18,595 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2022-01-10 14:21:18,596 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2022-01-10 14:21:18,596 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2022-01-10 14:21:18,597 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2022-01-10 14:21:18,597 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2022-01-10 14:21:18,598 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2022-01-10 14:21:18,598 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2022-01-10 14:21:18,599 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2022-01-10 14:21:18,599 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2022-01-10 14:21:18,600 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2022-01-10 14:21:18,601 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2022-01-10 14:21:18,602 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2022-01-10 14:21:18,603 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2022-01-10 14:21:18,609 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2022-01-10 14:21:18,610 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2022-01-10 14:21:18,611 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2022-01-10 14:21:18,612 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2022-01-10 14:21:18,612 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2022-01-10 14:21:18,613 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2022-01-10 14:21:18,613 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2022-01-10 14:21:18,613 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2022-01-10 14:21:18,614 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2022-01-10 14:21:18,614 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2022-01-10 14:21:18,614 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2022-01-10 14:21:18,615 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2022-01-10 14:21:18,615 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2022-01-10 14:21:18,616 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2022-01-10 14:21:18,616 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2022-01-10 14:21:18,616 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2022-01-10 14:21:18,617 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2022-01-10 14:21:18,617 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2022-01-10 14:21:18,617 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2022-01-10 14:21:18,618 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2022-01-10 14:21:18,618 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_LAZY.epf
[2022-01-10 14:21:18,631 INFO  L113        SettingsManager]: Loading preferences was successful
[2022-01-10 14:21:18,631 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2022-01-10 14:21:18,631 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2022-01-10 14:21:18,631 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2022-01-10 14:21:18,632 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2022-01-10 14:21:18,632 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2022-01-10 14:21:18,632 INFO  L138        SettingsManager]:  * Use SBE=true
[2022-01-10 14:21:18,633 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2022-01-10 14:21:18,633 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2022-01-10 14:21:18,633 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2022-01-10 14:21:18,633 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2022-01-10 14:21:18,633 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2022-01-10 14:21:18,633 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2022-01-10 14:21:18,633 INFO  L138        SettingsManager]:  * Adapt memory model on pointer casts if necessary=true
[2022-01-10 14:21:18,633 INFO  L138        SettingsManager]:  * Use bitvectors instead of ints=true
[2022-01-10 14:21:18,633 INFO  L138        SettingsManager]:  * Memory model=HoenickeLindenmann_4ByteResolution
[2022-01-10 14:21:18,634 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2022-01-10 14:21:18,634 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2022-01-10 14:21:18,634 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2022-01-10 14:21:18,634 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2022-01-10 14:21:18,634 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2022-01-10 14:21:18,634 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-01-10 14:21:18,634 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2022-01-10 14:21:18,634 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2022-01-10 14:21:18,635 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2022-01-10 14:21:18,635 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2022-01-10 14:21:18,635 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2022-01-10 14:21:18,635 INFO  L138        SettingsManager]:  * Large block encoding in concurrent analysis=OFF
[2022-01-10 14:21:18,635 INFO  L138        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2022-01-10 14:21:18,635 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2022-01-10 14:21:18,635 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2022-01-10 14:21:18,635 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2022-01-10 14:21:18,636 INFO  L136        SettingsManager]: Preferences of IcfgTransformer differ from their defaults:
[2022-01-10 14:21:18,636 INFO  L138        SettingsManager]:  * TransformationType=BV_TO_INT_LAZY
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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN;
[2022-01-10 14:21:18,787 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2022-01-10 14:21:18,799 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2022-01-10 14:21:18,800 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2022-01-10 14:21:18,801 INFO  L271        PluginConnector]: Initializing CDTParser...
[2022-01-10 14:21:18,801 INFO  L275        PluginConnector]: CDTParser initialized
[2022-01-10 14:21:18,802 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum04-1.i
[2022-01-10 14:21:18,854 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef59c45b9/3f57cb66e2484c6b87f6b837c4e6f03b/FLAGdf2a1edc5
[2022-01-10 14:21:19,212 INFO  L306              CDTParser]: Found 1 translation units.
[2022-01-10 14:21:19,213 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum04-1.i
[2022-01-10 14:21:19,220 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef59c45b9/3f57cb66e2484c6b87f6b837c4e6f03b/FLAGdf2a1edc5
[2022-01-10 14:21:19,232 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef59c45b9/3f57cb66e2484c6b87f6b837c4e6f03b
[2022-01-10 14:21:19,234 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2022-01-10 14:21:19,235 INFO  L131        ToolchainWalker]: Walking toolchain with 6 elements.
[2022-01-10 14:21:19,238 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2022-01-10 14:21:19,238 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2022-01-10 14:21:19,240 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2022-01-10 14:21:19,241 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 02:21:19" (1/1) ...
[2022-01-10 14:21:19,241 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24b79173 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:21:19, skipping insertion in model container
[2022-01-10 14:21:19,241 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 02:21:19" (1/1) ...
[2022-01-10 14:21:19,245 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2022-01-10 14:21:19,258 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2022-01-10 14:21:19,395 WARN  L230   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/sum04-1.i[808,821]
[2022-01-10 14:21:19,401 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-01-10 14:21:19,407 INFO  L203         MainTranslator]: Completed pre-run
[2022-01-10 14:21:19,415 WARN  L230   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/sum04-1.i[808,821]
[2022-01-10 14:21:19,417 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-01-10 14:21:19,424 INFO  L208         MainTranslator]: Completed translation
[2022-01-10 14:21:19,425 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:21:19 WrapperNode
[2022-01-10 14:21:19,425 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2022-01-10 14:21:19,426 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2022-01-10 14:21:19,426 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2022-01-10 14:21:19,426 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2022-01-10 14:21:19,441 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:21:19" (1/1) ...
[2022-01-10 14:21:19,446 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:21:19" (1/1) ...
[2022-01-10 14:21:19,456 INFO  L137                Inliner]: procedures = 14, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 28
[2022-01-10 14:21:19,456 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2022-01-10 14:21:19,456 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2022-01-10 14:21:19,456 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2022-01-10 14:21:19,457 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2022-01-10 14:21:19,461 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:21:19" (1/1) ...
[2022-01-10 14:21:19,461 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:21:19" (1/1) ...
[2022-01-10 14:21:19,462 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:21:19" (1/1) ...
[2022-01-10 14:21:19,463 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:21:19" (1/1) ...
[2022-01-10 14:21:19,465 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:21:19" (1/1) ...
[2022-01-10 14:21:19,467 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:21:19" (1/1) ...
[2022-01-10 14:21:19,467 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:21:19" (1/1) ...
[2022-01-10 14:21:19,468 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2022-01-10 14:21:19,469 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2022-01-10 14:21:19,469 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2022-01-10 14:21:19,469 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2022-01-10 14:21:19,470 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:21:19" (1/1) ...
[2022-01-10 14:21:19,474 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-01-10 14:21:19,481 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-10 14:21:19,490 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 14:21:19,495 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 14:21:19,518 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2022-01-10 14:21:19,518 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1
[2022-01-10 14:21:19,518 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2022-01-10 14:21:19,519 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2022-01-10 14:21:19,555 INFO  L234             CfgBuilder]: Building ICFG
[2022-01-10 14:21:19,556 INFO  L260             CfgBuilder]: Building CFG for each procedure with an implementation
[2022-01-10 14:21:19,625 INFO  L275             CfgBuilder]: Performing block encoding
[2022-01-10 14:21:19,629 INFO  L294             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2022-01-10 14:21:19,629 INFO  L299             CfgBuilder]: Removed 1 assume(true) statements.
[2022-01-10 14:21:19,630 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 02:21:19 BoogieIcfgContainer
[2022-01-10 14:21:19,630 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2022-01-10 14:21:19,630 INFO  L113        PluginConnector]: ------------------------IcfgTransformer----------------------------
[2022-01-10 14:21:19,631 INFO  L271        PluginConnector]: Initializing IcfgTransformer...
[2022-01-10 14:21:19,648 INFO  L275        PluginConnector]: IcfgTransformer initialized
[2022-01-10 14:21:19,650 INFO  L185        PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 02:21:19" (1/1) ...
[2022-01-10 14:21:19,680 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 02:21:19 BasicIcfg
[2022-01-10 14:21:19,681 INFO  L132        PluginConnector]: ------------------------ END IcfgTransformer----------------------------
[2022-01-10 14:21:19,681 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2022-01-10 14:21:19,681 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2022-01-10 14:21:19,683 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2022-01-10 14:21:19,683 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 02:21:19" (1/4) ...
[2022-01-10 14:21:19,684 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cd1cb24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 02:21:19, skipping insertion in model container
[2022-01-10 14:21:19,684 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:21:19" (2/4) ...
[2022-01-10 14:21:19,684 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cd1cb24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 02:21:19, skipping insertion in model container
[2022-01-10 14:21:19,684 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 02:21:19" (3/4) ...
[2022-01-10 14:21:19,684 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cd1cb24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 02:21:19, skipping insertion in model container
[2022-01-10 14:21:19,685 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 02:21:19" (4/4) ...
[2022-01-10 14:21:19,685 INFO  L111   eAbstractionObserver]: Analyzing ICFG sum04-1.iTransformedIcfg
[2022-01-10 14:21:19,688 INFO  L204   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2022-01-10 14:21:19,688 INFO  L163   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2022-01-10 14:21:19,715 INFO  L338      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2022-01-10 14:21:19,719 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 14:21:19,720 INFO  L340      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2022-01-10 14:21:19,727 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 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 14:21:19,730 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 7
[2022-01-10 14:21:19,730 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 14:21:19,731 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1]
[2022-01-10 14:21:19,731 INFO  L402      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 14:21:19,734 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 14:21:19,734 INFO  L85        PathProgramCache]: Analyzing trace with hash 1953496264, now seen corresponding path program 1 times
[2022-01-10 14:21:19,739 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 14:21:19,740 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300798519]
[2022-01-10 14:21:19,740 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 14:21:19,740 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 14:21:19,810 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 14:21:19,874 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 14:21:19,874 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 14:21:19,883 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300798519]
[2022-01-10 14:21:19,884 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300798519] provided 1 perfect and 0 imperfect interpolant sequences
[2022-01-10 14:21:19,884 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-01-10 14:21:19,885 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2022-01-10 14:21:19,886 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614992035]
[2022-01-10 14:21:19,887 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-10 14:21:19,890 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 2 states
[2022-01-10 14:21:19,890 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-10 14:21:19,908 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2022-01-10 14:21:19,909 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2022-01-10 14:21:19,910 INFO  L87              Difference]: Start difference. First operand  has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 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) 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 14:21:19,918 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 14:21:19,918 INFO  L93              Difference]: Finished difference Result 21 states and 24 transitions.
[2022-01-10 14:21:19,918 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. 
[2022-01-10 14:21:19,919 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 14:21:19,919 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 14:21:19,924 INFO  L225             Difference]: With dead ends: 21
[2022-01-10 14:21:19,925 INFO  L226             Difference]: Without dead ends: 9
[2022-01-10 14:21:19,926 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 14:21:19,929 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 14:21:19,931 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 14:21:19,941 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9 states.
[2022-01-10 14:21:19,947 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9.
[2022-01-10 14:21:19,948 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 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 14:21:19,949 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions.
[2022-01-10 14:21:19,949 INFO  L78                 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6
[2022-01-10 14:21:19,950 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 14:21:19,950 INFO  L470      AbstractCegarLoop]: Abstraction has 9 states and 10 transitions.
[2022-01-10 14:21:19,950 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 14:21:19,950 INFO  L276                IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions.
[2022-01-10 14:21:19,950 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 7
[2022-01-10 14:21:19,950 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 14:21:19,950 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1]
[2022-01-10 14:21:19,951 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2022-01-10 14:21:19,951 INFO  L402      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 14:21:19,951 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 14:21:19,951 INFO  L85        PathProgramCache]: Analyzing trace with hash 1953526055, now seen corresponding path program 1 times
[2022-01-10 14:21:19,952 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 14:21:19,952 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656012825]
[2022-01-10 14:21:19,952 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 14:21:19,952 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 14:21:19,974 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 14:21:19,999 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 14:21:20,000 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 14:21:20,000 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656012825]
[2022-01-10 14:21:20,000 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656012825] provided 1 perfect and 0 imperfect interpolant sequences
[2022-01-10 14:21:20,000 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-01-10 14:21:20,000 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2022-01-10 14:21:20,000 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378399784]
[2022-01-10 14:21:20,000 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-10 14:21:20,001 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2022-01-10 14:21:20,001 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-10 14:21:20,002 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2022-01-10 14:21:20,002 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2022-01-10 14:21:20,002 INFO  L87              Difference]: Start difference. First operand 9 states and 10 transitions. Second operand  has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 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 14:21:20,018 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 14:21:20,018 INFO  L93              Difference]: Finished difference Result 16 states and 18 transitions.
[2022-01-10 14:21:20,018 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2022-01-10 14:21:20,018 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 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 14:21:20,018 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 14:21:20,019 INFO  L225             Difference]: With dead ends: 16
[2022-01-10 14:21:20,019 INFO  L226             Difference]: Without dead ends: 12
[2022-01-10 14:21:20,019 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 14:21:20,020 INFO  L933         BasicCegarLoop]: 9 mSDtfsCounter, 4 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 24 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 14:21:20,020 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 24 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-01-10 14:21:20,021 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12 states.
[2022-01-10 14:21:20,022 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12.
[2022-01-10 14:21:20,022 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 14:21:20,023 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions.
[2022-01-10 14:21:20,023 INFO  L78                 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 6
[2022-01-10 14:21:20,023 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 14:21:20,023 INFO  L470      AbstractCegarLoop]: Abstraction has 12 states and 14 transitions.
[2022-01-10 14:21:20,023 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 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 14:21:20,023 INFO  L276                IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions.
[2022-01-10 14:21:20,023 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10
[2022-01-10 14:21:20,023 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 14:21:20,023 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 14:21:20,024 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2022-01-10 14:21:20,024 INFO  L402      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 14:21:20,024 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 14:21:20,024 INFO  L85        PathProgramCache]: Analyzing trace with hash 1605626063, now seen corresponding path program 1 times
[2022-01-10 14:21:20,024 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 14:21:20,025 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272641002]
[2022-01-10 14:21:20,025 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 14:21:20,025 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 14:21:20,045 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 14:21:20,084 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 14:21:20,085 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 14:21:20,085 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272641002]
[2022-01-10 14:21:20,085 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272641002] provided 0 perfect and 1 imperfect interpolant sequences
[2022-01-10 14:21:20,085 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929788659]
[2022-01-10 14:21:20,085 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 14:21:20,085 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-10 14:21:20,086 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-10 14:21:20,088 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 14:21:20,089 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 14:21:20,150 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 14:21:20,151 INFO  L263         TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 14 conjunts are in the unsatisfiable core
[2022-01-10 14:21:20,155 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 14:21:20,215 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 14:21:20,215 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-01-10 14:21:20,366 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 14:21:20,367 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [929788659] provided 0 perfect and 2 imperfect interpolant sequences
[2022-01-10 14:21:20,367 INFO  L186   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-01-10 14:21:20,367 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 7] total 12
[2022-01-10 14:21:20,367 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632096547]
[2022-01-10 14:21:20,367 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-01-10 14:21:20,368 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 12 states
[2022-01-10 14:21:20,368 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-10 14:21:20,368 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants.
[2022-01-10 14:21:20,368 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132
[2022-01-10 14:21:20,369 INFO  L87              Difference]: Start difference. First operand 12 states and 14 transitions. Second operand  has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 14:21:20,653 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 14:21:20,653 INFO  L93              Difference]: Finished difference Result 33 states and 42 transitions.
[2022-01-10 14:21:20,653 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. 
[2022-01-10 14:21:20,653 INFO  L78                 Accepts]: Start accepts. Automaton has  has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9
[2022-01-10 14:21:20,654 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 14:21:20,654 INFO  L225             Difference]: With dead ends: 33
[2022-01-10 14:21:20,654 INFO  L226             Difference]: Without dead ends: 19
[2022-01-10 14:21:20,654 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272
[2022-01-10 14:21:20,655 INFO  L933         BasicCegarLoop]: 4 mSDtfsCounter, 23 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-01-10 14:21:20,655 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 19 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-01-10 14:21:20,656 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 19 states.
[2022-01-10 14:21:20,658 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19.
[2022-01-10 14:21:20,658 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 14:21:20,658 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions.
[2022-01-10 14:21:20,658 INFO  L78                 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 9
[2022-01-10 14:21:20,659 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 14:21:20,659 INFO  L470      AbstractCegarLoop]: Abstraction has 19 states and 21 transitions.
[2022-01-10 14:21:20,659 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 14:21:20,659 INFO  L276                IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions.
[2022-01-10 14:21:20,659 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 19
[2022-01-10 14:21:20,659 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 14:21:20,659 INFO  L514         BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 14:21:20,683 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 14:21:20,871 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-10 14:21:20,871 INFO  L402      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 14:21:20,872 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 14:21:20,872 INFO  L85        PathProgramCache]: Analyzing trace with hash -1355544634, now seen corresponding path program 1 times
[2022-01-10 14:21:20,872 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 14:21:20,872 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620714732]
[2022-01-10 14:21:20,872 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 14:21:20,872 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 14:21:20,910 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 14:21:20,997 INFO  L134       CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 14:21:20,997 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 14:21:20,997 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620714732]
[2022-01-10 14:21:20,998 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620714732] provided 0 perfect and 1 imperfect interpolant sequences
[2022-01-10 14:21:20,999 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866487203]
[2022-01-10 14:21:20,999 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 14:21:20,999 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-10 14:21:21,000 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-10 14:21:21,000 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 14:21:21,002 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 14:21:21,052 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 14:21:21,053 INFO  L263         TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 17 conjunts are in the unsatisfiable core
[2022-01-10 14:21:21,054 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 14:21:24,985 INFO  L134       CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 14:21:24,985 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-01-10 14:21:25,664 INFO  L134       CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 14:21:25,665 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [866487203] provided 0 perfect and 2 imperfect interpolant sequences
[2022-01-10 14:21:25,665 INFO  L186   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-01-10 14:21:25,665 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 17
[2022-01-10 14:21:25,665 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656126441]
[2022-01-10 14:21:25,665 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-01-10 14:21:25,666 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 17 states
[2022-01-10 14:21:25,666 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-10 14:21:25,666 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants.
[2022-01-10 14:21:25,666 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=188, Unknown=1, NotChecked=0, Total=272
[2022-01-10 14:21:25,666 INFO  L87              Difference]: Start difference. First operand 19 states and 21 transitions. Second operand  has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 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 14:21:41,399 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 14:21:41,400 INFO  L93              Difference]: Finished difference Result 43 states and 53 transitions.
[2022-01-10 14:21:41,400 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. 
[2022-01-10 14:21:41,400 INFO  L78                 Accepts]: Start accepts. Automaton has  has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 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 18
[2022-01-10 14:21:41,400 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 14:21:41,402 INFO  L225             Difference]: With dead ends: 43
[2022-01-10 14:21:41,402 INFO  L226             Difference]: Without dead ends: 34
[2022-01-10 14:21:41,402 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 18.7s TimeCoverageRelationStatistics Valid=134, Invalid=283, Unknown=3, NotChecked=0, Total=420
[2022-01-10 14:21:41,404 INFO  L933         BasicCegarLoop]: 6 mSDtfsCounter, 23 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2022-01-10 14:21:41,404 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 26 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 82 Invalid, 0 Unknown, 58 Unchecked, 0.3s Time]
[2022-01-10 14:21:41,405 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 34 states.
[2022-01-10 14:21:41,408 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 28.
[2022-01-10 14:21:41,409 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 14:21:41,409 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions.
[2022-01-10 14:21:41,409 INFO  L78                 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 18
[2022-01-10 14:21:41,409 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 14:21:41,409 INFO  L470      AbstractCegarLoop]: Abstraction has 28 states and 32 transitions.
[2022-01-10 14:21:41,410 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 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 14:21:41,410 INFO  L276                IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions.
[2022-01-10 14:21:41,410 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 19
[2022-01-10 14:21:41,410 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 14:21:41,410 INFO  L514         BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1]
[2022-01-10 14:21:41,433 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0
[2022-01-10 14:21:41,611 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3
[2022-01-10 14:21:41,611 INFO  L402      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 14:21:41,612 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 14:21:41,612 INFO  L85        PathProgramCache]: Analyzing trace with hash 1131968199, now seen corresponding path program 2 times
[2022-01-10 14:21:41,612 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 14:21:41,612 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045675448]
[2022-01-10 14:21:41,612 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 14:21:41,612 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 14:21:41,633 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 14:21:41,676 INFO  L134       CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2022-01-10 14:21:41,677 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 14:21:41,677 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045675448]
[2022-01-10 14:21:41,677 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045675448] provided 0 perfect and 1 imperfect interpolant sequences
[2022-01-10 14:21:41,677 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723905303]
[2022-01-10 14:21:41,677 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2022-01-10 14:21:41,678 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-10 14:21:41,678 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-10 14:21:41,679 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 14:21:41,682 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 14:21:41,745 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2022-01-10 14:21:41,745 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-01-10 14:21:41,746 INFO  L263         TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 14 conjunts are in the unsatisfiable core
[2022-01-10 14:21:41,747 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 14:21:41,991 INFO  L134       CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2022-01-10 14:21:41,991 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-01-10 14:21:42,525 INFO  L134       CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2022-01-10 14:21:42,526 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [723905303] provided 0 perfect and 2 imperfect interpolant sequences
[2022-01-10 14:21:42,526 INFO  L186   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-01-10 14:21:42,526 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12
[2022-01-10 14:21:42,526 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089829117]
[2022-01-10 14:21:42,526 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-01-10 14:21:42,526 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 12 states
[2022-01-10 14:21:42,526 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-10 14:21:42,526 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants.
[2022-01-10 14:21:42,527 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132
[2022-01-10 14:21:42,527 INFO  L87              Difference]: Start difference. First operand 28 states and 32 transitions. Second operand  has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 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 14:21:44,688 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 14:21:44,688 INFO  L93              Difference]: Finished difference Result 44 states and 51 transitions.
[2022-01-10 14:21:44,699 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2022-01-10 14:21:44,700 INFO  L78                 Accepts]: Start accepts. Automaton has  has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 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 18
[2022-01-10 14:21:44,700 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 14:21:44,700 INFO  L225             Difference]: With dead ends: 44
[2022-01-10 14:21:44,700 INFO  L226             Difference]: Without dead ends: 29
[2022-01-10 14:21:44,700 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156
[2022-01-10 14:21:44,701 INFO  L933         BasicCegarLoop]: 7 mSDtfsCounter, 16 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-01-10 14:21:44,701 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 25 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 39 Invalid, 0 Unknown, 10 Unchecked, 0.1s Time]
[2022-01-10 14:21:44,702 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 29 states.
[2022-01-10 14:21:44,705 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28.
[2022-01-10 14:21:44,705 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 28 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 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 14:21:44,705 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions.
[2022-01-10 14:21:44,706 INFO  L78                 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 18
[2022-01-10 14:21:44,706 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 14:21:44,706 INFO  L470      AbstractCegarLoop]: Abstraction has 28 states and 31 transitions.
[2022-01-10 14:21:44,706 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 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 14:21:44,706 INFO  L276                IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions.
[2022-01-10 14:21:44,706 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 28
[2022-01-10 14:21:44,706 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 14:21:44,706 INFO  L514         BasicCegarLoop]: trace histogram [7, 7, 4, 3, 1, 1, 1, 1, 1, 1]
[2022-01-10 14:21:44,731 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0
[2022-01-10 14:21:44,919 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-10 14:21:44,920 INFO  L402      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 14:21:44,920 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 14:21:44,920 INFO  L85        PathProgramCache]: Analyzing trace with hash -1178082545, now seen corresponding path program 3 times
[2022-01-10 14:21:44,920 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 14:21:44,920 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650683116]
[2022-01-10 14:21:44,920 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 14:21:44,920 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 14:21:44,943 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 14:21:45,053 INFO  L134       CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 14:21:45,054 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 14:21:45,054 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650683116]
[2022-01-10 14:21:45,054 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650683116] provided 0 perfect and 1 imperfect interpolant sequences
[2022-01-10 14:21:45,054 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615897129]
[2022-01-10 14:21:45,054 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2022-01-10 14:21:45,054 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-10 14:21:45,054 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-10 14:21:45,055 INFO  L229       MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-01-10 14:21:45,056 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2022-01-10 14:21:45,250 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s)
[2022-01-10 14:21:45,251 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-01-10 14:21:45,252 INFO  L263         TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 39 conjunts are in the unsatisfiable core
[2022-01-10 14:21:45,255 INFO  L286         TraceCheckSpWp]: Computing forward predicates...