/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInlineTransformed.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_SUM.epf -i ../../../trunk/examples/svcomp/loop-invgen/nested9.i


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


This is Ultimate 0.2.2-dev-a10ec3b
[2022-01-11 02:03:34,677 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2022-01-11 02:03:34,679 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2022-01-11 02:03:34,739 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2022-01-11 02:03:34,740 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2022-01-11 02:03:34,742 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2022-01-11 02:03:34,744 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2022-01-11 02:03:34,746 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2022-01-11 02:03:34,747 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2022-01-11 02:03:34,750 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2022-01-11 02:03:34,751 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2022-01-11 02:03:34,752 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2022-01-11 02:03:34,752 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2022-01-11 02:03:34,754 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2022-01-11 02:03:34,755 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2022-01-11 02:03:34,755 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2022-01-11 02:03:34,756 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2022-01-11 02:03:34,756 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2022-01-11 02:03:34,760 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2022-01-11 02:03:34,764 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2022-01-11 02:03:34,765 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2022-01-11 02:03:34,766 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2022-01-11 02:03:34,767 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2022-01-11 02:03:34,767 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2022-01-11 02:03:34,772 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2022-01-11 02:03:34,772 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2022-01-11 02:03:34,772 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2022-01-11 02:03:34,774 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2022-01-11 02:03:34,774 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2022-01-11 02:03:34,774 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2022-01-11 02:03:34,774 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2022-01-11 02:03:34,775 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2022-01-11 02:03:34,776 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2022-01-11 02:03:34,776 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2022-01-11 02:03:34,777 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2022-01-11 02:03:34,778 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2022-01-11 02:03:34,778 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2022-01-11 02:03:34,778 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2022-01-11 02:03:34,778 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2022-01-11 02:03:34,779 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2022-01-11 02:03:34,779 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2022-01-11 02:03:34,780 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_SUM.epf
[2022-01-11 02:03:34,804 INFO  L113        SettingsManager]: Loading preferences was successful
[2022-01-11 02:03:34,804 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2022-01-11 02:03:34,805 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2022-01-11 02:03:34,805 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2022-01-11 02:03:34,806 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2022-01-11 02:03:34,806 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2022-01-11 02:03:34,806 INFO  L138        SettingsManager]:  * Use SBE=true
[2022-01-11 02:03:34,806 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2022-01-11 02:03:34,806 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2022-01-11 02:03:34,806 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2022-01-11 02:03:34,807 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2022-01-11 02:03:34,807 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2022-01-11 02:03:34,807 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2022-01-11 02:03:34,807 INFO  L138        SettingsManager]:  * Adapt memory model on pointer casts if necessary=true
[2022-01-11 02:03:34,807 INFO  L138        SettingsManager]:  * Use bitvectors instead of ints=true
[2022-01-11 02:03:34,807 INFO  L138        SettingsManager]:  * Memory model=HoenickeLindenmann_4ByteResolution
[2022-01-11 02:03:34,807 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2022-01-11 02:03:34,807 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2022-01-11 02:03:34,807 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2022-01-11 02:03:34,808 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2022-01-11 02:03:34,808 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2022-01-11 02:03:34,808 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-01-11 02:03:34,809 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2022-01-11 02:03:34,809 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2022-01-11 02:03:34,809 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2022-01-11 02:03:34,809 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2022-01-11 02:03:34,809 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2022-01-11 02:03:34,809 INFO  L138        SettingsManager]:  * Large block encoding in concurrent analysis=OFF
[2022-01-11 02:03:34,809 INFO  L138        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2022-01-11 02:03:34,809 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2022-01-11 02:03:34,809 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2022-01-11 02:03:34,809 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2022-01-11 02:03:34,810 INFO  L136        SettingsManager]: Preferences of IcfgTransformer differ from their defaults:
[2022-01-11 02:03:34,810 INFO  L138        SettingsManager]:  * TransformationType=BV_TO_INT_SUM
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int)
WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN;
[2022-01-11 02:03:34,992 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2022-01-11 02:03:35,014 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2022-01-11 02:03:35,015 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2022-01-11 02:03:35,016 INFO  L271        PluginConnector]: Initializing CDTParser...
[2022-01-11 02:03:35,017 INFO  L275        PluginConnector]: CDTParser initialized
[2022-01-11 02:03:35,017 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/nested9.i
[2022-01-11 02:03:35,061 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd908b29f/826cad19d8604e24b3aa046db7baadca/FLAG024320563
[2022-01-11 02:03:35,430 INFO  L306              CDTParser]: Found 1 translation units.
[2022-01-11 02:03:35,431 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/nested9.i
[2022-01-11 02:03:35,439 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd908b29f/826cad19d8604e24b3aa046db7baadca/FLAG024320563
[2022-01-11 02:03:35,449 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd908b29f/826cad19d8604e24b3aa046db7baadca
[2022-01-11 02:03:35,453 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2022-01-11 02:03:35,454 INFO  L131        ToolchainWalker]: Walking toolchain with 6 elements.
[2022-01-11 02:03:35,456 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2022-01-11 02:03:35,456 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2022-01-11 02:03:35,458 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2022-01-11 02:03:35,459 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 02:03:35" (1/1) ...
[2022-01-11 02:03:35,459 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2182b766 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:03:35, skipping insertion in model container
[2022-01-11 02:03:35,460 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 02:03:35" (1/1) ...
[2022-01-11 02:03:35,464 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2022-01-11 02:03:35,473 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2022-01-11 02:03:35,623 WARN  L230   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/nested9.i[893,906]
[2022-01-11 02:03:35,639 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-01-11 02:03:35,647 INFO  L203         MainTranslator]: Completed pre-run
[2022-01-11 02:03:35,658 WARN  L230   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/nested9.i[893,906]
[2022-01-11 02:03:35,667 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-01-11 02:03:35,682 INFO  L208         MainTranslator]: Completed translation
[2022-01-11 02:03:35,683 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:03:35 WrapperNode
[2022-01-11 02:03:35,683 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2022-01-11 02:03:35,684 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2022-01-11 02:03:35,684 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2022-01-11 02:03:35,684 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2022-01-11 02:03:35,688 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:03:35" (1/1) ...
[2022-01-11 02:03:35,694 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:03:35" (1/1) ...
[2022-01-11 02:03:35,707 INFO  L137                Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 67
[2022-01-11 02:03:35,708 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2022-01-11 02:03:35,708 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2022-01-11 02:03:35,708 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2022-01-11 02:03:35,708 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2022-01-11 02:03:35,714 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:03:35" (1/1) ...
[2022-01-11 02:03:35,714 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:03:35" (1/1) ...
[2022-01-11 02:03:35,722 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:03:35" (1/1) ...
[2022-01-11 02:03:35,722 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:03:35" (1/1) ...
[2022-01-11 02:03:35,732 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:03:35" (1/1) ...
[2022-01-11 02:03:35,735 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:03:35" (1/1) ...
[2022-01-11 02:03:35,735 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:03:35" (1/1) ...
[2022-01-11 02:03:35,736 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2022-01-11 02:03:35,737 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2022-01-11 02:03:35,737 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2022-01-11 02:03:35,737 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2022-01-11 02:03:35,739 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:03:35" (1/1) ...
[2022-01-11 02:03:35,743 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-01-11 02:03:35,750 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-11 02:03:35,760 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2022-01-11 02:03:35,768 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2022-01-11 02:03:35,795 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2022-01-11 02:03:35,795 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1
[2022-01-11 02:03:35,795 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2022-01-11 02:03:35,795 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2022-01-11 02:03:35,843 INFO  L234             CfgBuilder]: Building ICFG
[2022-01-11 02:03:35,844 INFO  L260             CfgBuilder]: Building CFG for each procedure with an implementation
[2022-01-11 02:03:35,988 INFO  L275             CfgBuilder]: Performing block encoding
[2022-01-11 02:03:35,992 INFO  L294             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2022-01-11 02:03:35,992 INFO  L299             CfgBuilder]: Removed 3 assume(true) statements.
[2022-01-11 02:03:35,993 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 02:03:35 BoogieIcfgContainer
[2022-01-11 02:03:35,993 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2022-01-11 02:03:35,994 INFO  L113        PluginConnector]: ------------------------IcfgTransformer----------------------------
[2022-01-11 02:03:35,994 INFO  L271        PluginConnector]: Initializing IcfgTransformer...
[2022-01-11 02:03:35,995 INFO  L275        PluginConnector]: IcfgTransformer initialized
[2022-01-11 02:03:35,997 INFO  L185        PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 02:03:35" (1/1) ...
[2022-01-11 02:03:36,046 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 02:03:36 BasicIcfg
[2022-01-11 02:03:36,046 INFO  L132        PluginConnector]: ------------------------ END IcfgTransformer----------------------------
[2022-01-11 02:03:36,047 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2022-01-11 02:03:36,047 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2022-01-11 02:03:36,049 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2022-01-11 02:03:36,049 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.01 02:03:35" (1/4) ...
[2022-01-11 02:03:36,050 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@96baca4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 02:03:36, skipping insertion in model container
[2022-01-11 02:03:36,050 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:03:35" (2/4) ...
[2022-01-11 02:03:36,050 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@96baca4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 02:03:36, skipping insertion in model container
[2022-01-11 02:03:36,050 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 02:03:35" (3/4) ...
[2022-01-11 02:03:36,050 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@96baca4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.01 02:03:36, skipping insertion in model container
[2022-01-11 02:03:36,050 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 02:03:36" (4/4) ...
[2022-01-11 02:03:36,051 INFO  L111   eAbstractionObserver]: Analyzing ICFG nested9.iTransformedIcfg
[2022-01-11 02:03:36,054 INFO  L204   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2022-01-11 02:03:36,054 INFO  L163   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2022-01-11 02:03:36,095 INFO  L338      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2022-01-11 02:03:36,103 INFO  L339      AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR
[2022-01-11 02:03:36,103 INFO  L340      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2022-01-11 02:03:36,113 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 21 states, 19 states have (on average 1.631578947368421) internal successors, (31), 20 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)
[2022-01-11 02:03:36,117 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 13
[2022-01-11 02:03:36,117 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-11 02:03:36,117 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-11 02:03:36,118 INFO  L402      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-11 02:03:36,124 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-11 02:03:36,124 INFO  L85        PathProgramCache]: Analyzing trace with hash -2100180784, now seen corresponding path program 1 times
[2022-01-11 02:03:36,130 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-11 02:03:36,131 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034738150]
[2022-01-11 02:03:36,131 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-11 02:03:36,131 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-11 02:03:36,281 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-11 02:03:36,525 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-11 02:03:36,526 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-11 02:03:36,526 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034738150]
[2022-01-11 02:03:36,527 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034738150] provided 1 perfect and 0 imperfect interpolant sequences
[2022-01-11 02:03:36,527 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-01-11 02:03:36,527 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2022-01-11 02:03:36,528 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676104437]
[2022-01-11 02:03:36,529 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-11 02:03:36,531 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2022-01-11 02:03:36,531 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-11 02:03:36,553 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2022-01-11 02:03:36,554 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2022-01-11 02:03:36,555 INFO  L87              Difference]: Start difference. First operand  has 21 states, 19 states have (on average 1.631578947368421) internal successors, (31), 20 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) Second operand  has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-11 02:03:36,701 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-11 02:03:36,701 INFO  L93              Difference]: Finished difference Result 44 states and 65 transitions.
[2022-01-11 02:03:36,702 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2022-01-11 02:03:36,704 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12
[2022-01-11 02:03:36,704 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-11 02:03:36,709 INFO  L225             Difference]: With dead ends: 44
[2022-01-11 02:03:36,709 INFO  L226             Difference]: Without dead ends: 22
[2022-01-11 02:03:36,712 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42
[2022-01-11 02:03:36,714 INFO  L933         BasicCegarLoop]: 23 mSDtfsCounter, 12 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-01-11 02:03:36,715 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 81 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-01-11 02:03:36,727 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 22 states.
[2022-01-11 02:03:36,748 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21.
[2022-01-11 02:03:36,749 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-11 02:03:36,750 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions.
[2022-01-11 02:03:36,751 INFO  L78                 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 12
[2022-01-11 02:03:36,752 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-11 02:03:36,752 INFO  L470      AbstractCegarLoop]: Abstraction has 21 states and 24 transitions.
[2022-01-11 02:03:36,752 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-11 02:03:36,753 INFO  L276                IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions.
[2022-01-11 02:03:36,754 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 16
[2022-01-11 02:03:36,754 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-11 02:03:36,754 INFO  L514         BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-11 02:03:36,754 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2022-01-11 02:03:36,755 INFO  L402      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-11 02:03:36,758 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-11 02:03:36,758 INFO  L85        PathProgramCache]: Analyzing trace with hash 1615990199, now seen corresponding path program 1 times
[2022-01-11 02:03:36,758 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-11 02:03:36,759 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008966973]
[2022-01-11 02:03:36,759 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-11 02:03:36,759 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-11 02:03:36,824 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-11 02:03:37,099 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-11 02:03:37,099 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-11 02:03:37,100 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008966973]
[2022-01-11 02:03:37,100 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008966973] provided 0 perfect and 1 imperfect interpolant sequences
[2022-01-11 02:03:37,100 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051599483]
[2022-01-11 02:03:37,101 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-11 02:03:37,101 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-11 02:03:37,101 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-11 02:03:37,112 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-01-11 02:03:37,113 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2022-01-11 02:03:37,245 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-11 02:03:37,246 INFO  L263         TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 11 conjunts are in the unsatisfiable core
[2022-01-11 02:03:37,250 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-11 02:03:38,829 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-01-11 02:03:38,829 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-01-11 02:04:05,611 WARN  L838   $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_ULTIMATE.start_main_~i~0#1Int| Int)) (let ((.cse0 (* |c_ULTIMATE.start_ULTIMATE.start_main_~n~0#1Int| 2)) (.cse1 (+ (mod (* 4294967295 |ULTIMATE.start_ULTIMATE.start_main_~i~0#1Int|) 4294967296) |ULTIMATE.start_ULTIMATE.start_main_~i~0#1Int|))) (<= (+ (mod .cse0 4294967296) (* 2 (mod .cse1 2147483648))) (+ (* (mod .cse0 2147483648) 2) (mod .cse1 4294967296))))) (not (< (+ |c_ULTIMATE.start_ULTIMATE.start_main_~n~0#1Int| (* 2 (mod |c_ULTIMATE.start_ULTIMATE.start_main_~i~0#1Int| 2147483648))) (+ (* 2 (mod |c_ULTIMATE.start_ULTIMATE.start_main_~n~0#1Int| 2147483648)) |c_ULTIMATE.start_ULTIMATE.start_main_~i~0#1Int|)))) is different from false
[2022-01-11 02:04:08,202 WARN  L838   $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_ULTIMATE.start_main_~i~0#1Int| Int)) (let ((.cse0 (* |c_ULTIMATE.start_ULTIMATE.start_main_~n~0#1Int| 2)) (.cse1 (+ (mod (* 4294967295 |ULTIMATE.start_ULTIMATE.start_main_~i~0#1Int|) 4294967296) |ULTIMATE.start_ULTIMATE.start_main_~i~0#1Int|))) (<= (+ (mod .cse0 4294967296) (* 2 (mod .cse1 2147483648))) (+ (* (mod .cse0 2147483648) 2) (mod .cse1 4294967296))))) (not (< |c_ULTIMATE.start_ULTIMATE.start_main_~n~0#1Int| (* 2 (mod |c_ULTIMATE.start_ULTIMATE.start_main_~n~0#1Int| 2147483648))))) is different from false
[2022-01-11 02:04:08,482 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked.
[2022-01-11 02:04:08,483 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051599483] provided 0 perfect and 2 imperfect interpolant sequences
[2022-01-11 02:04:08,483 INFO  L186   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-01-11 02:04:08,483 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 17
[2022-01-11 02:04:08,484 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068305072]
[2022-01-11 02:04:08,484 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-01-11 02:04:08,484 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 17 states
[2022-01-11 02:04:08,485 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-11 02:04:08,485 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants.
[2022-01-11 02:04:08,485 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=158, Unknown=12, NotChecked=54, Total=272
[2022-01-11 02:04:08,486 INFO  L87              Difference]: Start difference. First operand 21 states and 24 transitions. Second operand  has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 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)
[2022-01-11 02:04:14,209 WARN  L534   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers []
[2022-01-11 02:04:20,312 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-11 02:04:20,312 INFO  L93              Difference]: Finished difference Result 119 states and 156 transitions.
[2022-01-11 02:04:20,312 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. 
[2022-01-11 02:04:20,313 INFO  L78                 Accepts]: Start accepts. Automaton has  has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 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) Word has length 15
[2022-01-11 02:04:20,313 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-11 02:04:20,315 INFO  L225             Difference]: With dead ends: 119
[2022-01-11 02:04:20,315 INFO  L226             Difference]: Without dead ends: 117
[2022-01-11 02:04:20,316 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 38.0s TimeCoverageRelationStatistics Valid=363, Invalid=964, Unknown=13, NotChecked=142, Total=1482
[2022-01-11 02:04:20,317 INFO  L933         BasicCegarLoop]: 13 mSDtfsCounter, 286 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 134 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time
[2022-01-11 02:04:20,317 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 91 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 285 Invalid, 0 Unknown, 134 Unchecked, 2.6s Time]
[2022-01-11 02:04:20,318 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 117 states.
[2022-01-11 02:04:20,326 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 27.
[2022-01-11 02:04:20,327 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 27 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 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)
[2022-01-11 02:04:20,327 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions.
[2022-01-11 02:04:20,327 INFO  L78                 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 15
[2022-01-11 02:04:20,327 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-11 02:04:20,327 INFO  L470      AbstractCegarLoop]: Abstraction has 27 states and 32 transitions.
[2022-01-11 02:04:20,327 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 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)
[2022-01-11 02:04:20,328 INFO  L276                IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions.
[2022-01-11 02:04:20,328 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 24
[2022-01-11 02:04:20,328 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-11 02:04:20,328 INFO  L514         BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-11 02:04:20,334 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0
[2022-01-11 02:04:20,531 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-11 02:04:20,531 INFO  L402      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-11 02:04:20,533 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-11 02:04:20,533 INFO  L85        PathProgramCache]: Analyzing trace with hash 1284155311, now seen corresponding path program 1 times
[2022-01-11 02:04:20,533 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-11 02:04:20,533 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836694896]
[2022-01-11 02:04:20,533 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-11 02:04:20,533 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-11 02:04:20,593 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-11 02:04:20,732 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-01-11 02:04:20,732 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-11 02:04:20,732 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836694896]
[2022-01-11 02:04:20,732 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836694896] provided 0 perfect and 1 imperfect interpolant sequences
[2022-01-11 02:04:20,732 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329876448]
[2022-01-11 02:04:20,732 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-11 02:04:20,733 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-11 02:04:20,733 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-11 02:04:20,736 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-01-11 02:04:20,759 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2022-01-11 02:04:20,895 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-11 02:04:20,897 INFO  L263         TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 13 conjunts are in the unsatisfiable core
[2022-01-11 02:04:20,898 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-11 02:04:21,229 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-01-11 02:04:21,229 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-01-11 02:04:23,768 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-01-11 02:04:23,768 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [329876448] provided 0 perfect and 2 imperfect interpolant sequences
[2022-01-11 02:04:23,768 INFO  L186   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-01-11 02:04:23,769 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15
[2022-01-11 02:04:23,769 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136923892]
[2022-01-11 02:04:23,769 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-01-11 02:04:23,769 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 15 states
[2022-01-11 02:04:23,769 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-11 02:04:23,770 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants.
[2022-01-11 02:04:23,770 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=167, Unknown=1, NotChecked=0, Total=210
[2022-01-11 02:04:23,770 INFO  L87              Difference]: Start difference. First operand 27 states and 32 transitions. Second operand  has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-11 02:04:24,715 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-11 02:04:24,715 INFO  L93              Difference]: Finished difference Result 55 states and 68 transitions.
[2022-01-11 02:04:24,716 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. 
[2022-01-11 02:04:24,716 INFO  L78                 Accepts]: Start accepts. Automaton has  has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 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 23
[2022-01-11 02:04:24,716 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-11 02:04:24,717 INFO  L225             Difference]: With dead ends: 55
[2022-01-11 02:04:24,717 INFO  L226             Difference]: Without dead ends: 39
[2022-01-11 02:04:24,718 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=92, Invalid=287, Unknown=1, NotChecked=0, Total=380
[2022-01-11 02:04:24,720 INFO  L933         BasicCegarLoop]: 11 mSDtfsCounter, 32 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time
[2022-01-11 02:04:24,721 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 94 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 83 Invalid, 0 Unknown, 4 Unchecked, 0.5s Time]
[2022-01-11 02:04:24,722 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 39 states.
[2022-01-11 02:04:24,731 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35.
[2022-01-11 02:04:24,732 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 35 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-11 02:04:24,732 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions.
[2022-01-11 02:04:24,732 INFO  L78                 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 23
[2022-01-11 02:04:24,732 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-11 02:04:24,732 INFO  L470      AbstractCegarLoop]: Abstraction has 35 states and 40 transitions.
[2022-01-11 02:04:24,732 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-11 02:04:24,733 INFO  L276                IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions.
[2022-01-11 02:04:24,733 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 31
[2022-01-11 02:04:24,733 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-11 02:04:24,733 INFO  L514         BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-11 02:04:24,740 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0
[2022-01-11 02:04:24,939 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,SelfDestructingSolverStorable2
[2022-01-11 02:04:24,940 INFO  L402      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-11 02:04:24,940 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-11 02:04:24,940 INFO  L85        PathProgramCache]: Analyzing trace with hash -224412557, now seen corresponding path program 1 times
[2022-01-11 02:04:24,940 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-11 02:04:24,941 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799578916]
[2022-01-11 02:04:24,941 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-11 02:04:24,941 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-11 02:04:24,990 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-11 02:04:25,111 INFO  L134       CoverageAnalysis]: Checked inductivity of 26 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked.
[2022-01-11 02:04:25,112 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-11 02:04:25,112 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799578916]
[2022-01-11 02:04:25,112 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799578916] provided 0 perfect and 1 imperfect interpolant sequences
[2022-01-11 02:04:25,112 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721258561]
[2022-01-11 02:04:25,112 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-11 02:04:25,112 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-11 02:04:25,112 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-11 02:04:25,114 INFO  L229       MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-01-11 02:04:25,143 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2022-01-11 02:04:25,392 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-11 02:04:25,394 INFO  L263         TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 18 conjunts are in the unsatisfiable core
[2022-01-11 02:04:25,395 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-11 02:04:26,275 INFO  L134       CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2022-01-11 02:04:26,276 INFO  L328         TraceCheckSpWp]: Computing backward predicates...