/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInlineTransformed.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_NONE.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/nested5-2.c


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


This is Ultimate 0.2.2-dev-a10ec3b
[2022-01-10 20:22:39,733 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2022-01-10 20:22:39,735 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2022-01-10 20:22:39,783 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2022-01-10 20:22:39,791 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2022-01-10 20:22:39,792 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2022-01-10 20:22:39,793 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
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[2022-01-10 20:22:39,796 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
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[2022-01-10 20:22:39,799 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2022-01-10 20:22:39,799 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2022-01-10 20:22:39,800 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2022-01-10 20:22:39,801 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2022-01-10 20:22:39,802 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2022-01-10 20:22:39,802 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2022-01-10 20:22:39,803 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2022-01-10 20:22:39,804 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2022-01-10 20:22:39,806 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2022-01-10 20:22:39,807 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2022-01-10 20:22:39,809 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2022-01-10 20:22:39,810 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2022-01-10 20:22:39,810 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2022-01-10 20:22:39,812 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2022-01-10 20:22:39,813 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2022-01-10 20:22:39,813 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2022-01-10 20:22:39,813 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2022-01-10 20:22:39,814 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2022-01-10 20:22:39,814 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2022-01-10 20:22:39,815 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2022-01-10 20:22:39,815 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2022-01-10 20:22:39,816 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2022-01-10 20:22:39,816 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2022-01-10 20:22:39,817 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2022-01-10 20:22:39,817 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2022-01-10 20:22:39,818 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2022-01-10 20:22:39,818 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2022-01-10 20:22:39,818 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2022-01-10 20:22:39,827 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2022-01-10 20:22:39,828 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_NONE.epf
[2022-01-10 20:22:39,848 INFO  L113        SettingsManager]: Loading preferences was successful
[2022-01-10 20:22:39,848 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2022-01-10 20:22:39,848 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2022-01-10 20:22:39,848 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2022-01-10 20:22:39,849 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2022-01-10 20:22:39,849 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2022-01-10 20:22:39,850 INFO  L138        SettingsManager]:  * Use SBE=true
[2022-01-10 20:22:39,850 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2022-01-10 20:22:39,850 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2022-01-10 20:22:39,850 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2022-01-10 20:22:39,850 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2022-01-10 20:22:39,850 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2022-01-10 20:22:39,850 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2022-01-10 20:22:39,851 INFO  L138        SettingsManager]:  * Adapt memory model on pointer casts if necessary=true
[2022-01-10 20:22:39,851 INFO  L138        SettingsManager]:  * Use bitvectors instead of ints=true
[2022-01-10 20:22:39,851 INFO  L138        SettingsManager]:  * Memory model=HoenickeLindenmann_4ByteResolution
[2022-01-10 20:22:39,851 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2022-01-10 20:22:39,851 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2022-01-10 20:22:39,851 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2022-01-10 20:22:39,851 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2022-01-10 20:22:39,851 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2022-01-10 20:22:39,852 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-01-10 20:22:39,852 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2022-01-10 20:22:39,852 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2022-01-10 20:22:39,852 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2022-01-10 20:22:39,852 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2022-01-10 20:22:39,852 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2022-01-10 20:22:39,852 INFO  L138        SettingsManager]:  * Large block encoding in concurrent analysis=OFF
[2022-01-10 20:22:39,852 INFO  L138        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2022-01-10 20:22:39,853 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2022-01-10 20:22:39,853 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2022-01-10 20:22:39,853 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2022-01-10 20:22:39,853 INFO  L136        SettingsManager]: Preferences of IcfgTransformer differ from their defaults:
[2022-01-10 20:22:39,854 INFO  L138        SettingsManager]:  * TransformationType=BV_TO_INT_NONE
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int)
WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN;
[2022-01-10 20:22:40,059 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2022-01-10 20:22:40,084 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2022-01-10 20:22:40,086 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2022-01-10 20:22:40,087 INFO  L271        PluginConnector]: Initializing CDTParser...
[2022-01-10 20:22:40,089 INFO  L275        PluginConnector]: CDTParser initialized
[2022-01-10 20:22:40,090 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/nested5-2.c
[2022-01-10 20:22:40,146 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1bf20c3e/7ba55e4ed2ae43bf868ae85edfb368e2/FLAGa0bbe40b2
[2022-01-10 20:22:40,571 INFO  L306              CDTParser]: Found 1 translation units.
[2022-01-10 20:22:40,572 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/nested5-2.c
[2022-01-10 20:22:40,581 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1bf20c3e/7ba55e4ed2ae43bf868ae85edfb368e2/FLAGa0bbe40b2
[2022-01-10 20:22:40,980 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1bf20c3e/7ba55e4ed2ae43bf868ae85edfb368e2
[2022-01-10 20:22:40,983 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2022-01-10 20:22:40,984 INFO  L131        ToolchainWalker]: Walking toolchain with 6 elements.
[2022-01-10 20:22:40,985 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2022-01-10 20:22:40,985 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2022-01-10 20:22:40,988 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2022-01-10 20:22:40,989 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 08:22:40" (1/1) ...
[2022-01-10 20:22:40,990 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41802b86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:22:40, skipping insertion in model container
[2022-01-10 20:22:40,990 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 08:22:40" (1/1) ...
[2022-01-10 20:22:40,995 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2022-01-10 20:22:41,005 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2022-01-10 20:22:41,124 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-crafted-1/nested5-2.c[321,334]
[2022-01-10 20:22:41,155 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-01-10 20:22:41,166 INFO  L203         MainTranslator]: Completed pre-run
[2022-01-10 20:22:41,174 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-crafted-1/nested5-2.c[321,334]
[2022-01-10 20:22:41,181 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-01-10 20:22:41,191 INFO  L208         MainTranslator]: Completed translation
[2022-01-10 20:22:41,192 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:22:41 WrapperNode
[2022-01-10 20:22:41,192 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2022-01-10 20:22:41,193 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2022-01-10 20:22:41,193 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2022-01-10 20:22:41,193 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2022-01-10 20:22:41,198 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:22:41" (1/1) ...
[2022-01-10 20:22:41,204 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:22:41" (1/1) ...
[2022-01-10 20:22:41,221 INFO  L137                Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 64
[2022-01-10 20:22:41,222 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2022-01-10 20:22:41,223 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2022-01-10 20:22:41,223 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2022-01-10 20:22:41,223 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2022-01-10 20:22:41,228 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:22:41" (1/1) ...
[2022-01-10 20:22:41,228 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:22:41" (1/1) ...
[2022-01-10 20:22:41,230 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:22:41" (1/1) ...
[2022-01-10 20:22:41,230 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:22:41" (1/1) ...
[2022-01-10 20:22:41,233 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:22:41" (1/1) ...
[2022-01-10 20:22:41,237 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:22:41" (1/1) ...
[2022-01-10 20:22:41,237 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:22:41" (1/1) ...
[2022-01-10 20:22:41,239 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2022-01-10 20:22:41,240 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2022-01-10 20:22:41,240 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2022-01-10 20:22:41,240 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2022-01-10 20:22:41,241 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:22:41" (1/1) ...
[2022-01-10 20:22:41,248 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-01-10 20:22:41,256 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-10 20:22:41,271 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2022-01-10 20:22:41,273 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2022-01-10 20:22:41,303 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2022-01-10 20:22:41,303 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2022-01-10 20:22:41,303 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2022-01-10 20:22:41,304 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1
[2022-01-10 20:22:41,351 INFO  L234             CfgBuilder]: Building ICFG
[2022-01-10 20:22:41,352 INFO  L260             CfgBuilder]: Building CFG for each procedure with an implementation
[2022-01-10 20:22:41,472 INFO  L275             CfgBuilder]: Performing block encoding
[2022-01-10 20:22:41,477 INFO  L294             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2022-01-10 20:22:41,478 INFO  L299             CfgBuilder]: Removed 5 assume(true) statements.
[2022-01-10 20:22:41,479 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 08:22:41 BoogieIcfgContainer
[2022-01-10 20:22:41,479 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2022-01-10 20:22:41,480 INFO  L113        PluginConnector]: ------------------------IcfgTransformer----------------------------
[2022-01-10 20:22:41,480 INFO  L271        PluginConnector]: Initializing IcfgTransformer...
[2022-01-10 20:22:41,481 INFO  L275        PluginConnector]: IcfgTransformer initialized
[2022-01-10 20:22:41,483 INFO  L185        PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 08:22:41" (1/1) ...
[2022-01-10 20:22:41,563 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 08:22:41 BasicIcfg
[2022-01-10 20:22:41,563 INFO  L132        PluginConnector]: ------------------------ END IcfgTransformer----------------------------
[2022-01-10 20:22:41,571 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2022-01-10 20:22:41,572 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2022-01-10 20:22:41,574 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2022-01-10 20:22:41,574 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 08:22:40" (1/4) ...
[2022-01-10 20:22:41,575 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@238cef4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 08:22:41, skipping insertion in model container
[2022-01-10 20:22:41,575 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:22:41" (2/4) ...
[2022-01-10 20:22:41,575 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@238cef4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 08:22:41, skipping insertion in model container
[2022-01-10 20:22:41,575 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 08:22:41" (3/4) ...
[2022-01-10 20:22:41,576 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@238cef4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 08:22:41, skipping insertion in model container
[2022-01-10 20:22:41,576 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 08:22:41" (4/4) ...
[2022-01-10 20:22:41,577 INFO  L111   eAbstractionObserver]: Analyzing ICFG nested5-2.cTransformedIcfg
[2022-01-10 20:22:41,582 INFO  L204   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2022-01-10 20:22:41,582 INFO  L163   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2022-01-10 20:22:41,621 INFO  L338      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2022-01-10 20:22:41,628 INFO  L339      AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR
[2022-01-10 20:22:41,628 INFO  L340      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2022-01-10 20:22:41,639 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)
[2022-01-10 20:22:41,643 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 11
[2022-01-10 20:22:41,643 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 20:22:41,643 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 20:22:41,644 INFO  L402      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 20:22:41,648 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 20:22:41,649 INFO  L85        PathProgramCache]: Analyzing trace with hash -437933584, now seen corresponding path program 1 times
[2022-01-10 20:22:41,656 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 20:22:41,656 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747474188]
[2022-01-10 20:22:41,657 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 20:22:41,658 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 20:22:41,780 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 20:22:41,868 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 20:22:41,869 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 20:22:41,869 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747474188]
[2022-01-10 20:22:41,870 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747474188] provided 1 perfect and 0 imperfect interpolant sequences
[2022-01-10 20:22:41,870 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-01-10 20:22:41,870 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2022-01-10 20:22:41,871 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255842421]
[2022-01-10 20:22:41,872 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-10 20:22:41,875 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 2 states
[2022-01-10 20:22:41,876 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-10 20:22:41,905 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2022-01-10 20:22:41,907 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2022-01-10 20:22:41,909 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 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 20:22:41,932 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 20:22:41,932 INFO  L93              Difference]: Finished difference Result 40 states and 60 transitions.
[2022-01-10 20:22:41,933 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. 
[2022-01-10 20:22:41,934 INFO  L78                 Accepts]: Start accepts. Automaton has  has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 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) Word has length 10
[2022-01-10 20:22:41,935 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 20:22:41,941 INFO  L225             Difference]: With dead ends: 40
[2022-01-10 20:22:41,941 INFO  L226             Difference]: Without dead ends: 17
[2022-01-10 20:22:41,945 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2022-01-10 20:22:41,952 INFO  L933         BasicCegarLoop]: 25 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, 25 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-01-10 20:22:41,953 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-01-10 20:22:41,967 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 17 states.
[2022-01-10 20:22:41,983 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17.
[2022-01-10 20:22:41,985 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 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 20:22:41,986 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions.
[2022-01-10 20:22:41,987 INFO  L78                 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 10
[2022-01-10 20:22:41,987 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 20:22:41,988 INFO  L470      AbstractCegarLoop]: Abstraction has 17 states and 21 transitions.
[2022-01-10 20:22:41,988 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 20:22:41,989 INFO  L276                IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions.
[2022-01-10 20:22:41,990 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 11
[2022-01-10 20:22:41,990 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 20:22:41,990 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 20:22:41,990 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2022-01-10 20:22:41,991 INFO  L402      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 20:22:41,996 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 20:22:41,996 INFO  L85        PathProgramCache]: Analyzing trace with hash -437903793, now seen corresponding path program 1 times
[2022-01-10 20:22:41,997 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 20:22:41,997 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567019207]
[2022-01-10 20:22:41,997 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 20:22:41,997 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 20:22:42,028 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 20:22:42,103 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 20:22:42,104 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 20:22:42,104 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567019207]
[2022-01-10 20:22:42,104 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567019207] provided 1 perfect and 0 imperfect interpolant sequences
[2022-01-10 20:22:42,105 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-01-10 20:22:42,105 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2022-01-10 20:22:42,105 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33996946]
[2022-01-10 20:22:42,106 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-10 20:22:42,107 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-01-10 20:22:42,108 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-10 20:22:42,108 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-01-10 20:22:42,109 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-01-10 20:22:42,109 INFO  L87              Difference]: Start difference. First operand 17 states and 21 transitions. Second operand  has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 20:22:42,138 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 20:22:42,139 INFO  L93              Difference]: Finished difference Result 41 states and 53 transitions.
[2022-01-10 20:22:42,139 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-01-10 20:22:42,139 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 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) Word has length 10
[2022-01-10 20:22:42,140 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 20:22:42,141 INFO  L225             Difference]: With dead ends: 41
[2022-01-10 20:22:42,141 INFO  L226             Difference]: Without dead ends: 26
[2022-01-10 20:22:42,145 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-01-10 20:22:42,146 INFO  L933         BasicCegarLoop]: 19 mSDtfsCounter, 10 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-01-10 20:22:42,147 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 34 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-01-10 20:22:42,149 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 26 states.
[2022-01-10 20:22:42,154 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 18.
[2022-01-10 20:22:42,155 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 20:22:42,155 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions.
[2022-01-10 20:22:42,155 INFO  L78                 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 10
[2022-01-10 20:22:42,156 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 20:22:42,156 INFO  L470      AbstractCegarLoop]: Abstraction has 18 states and 22 transitions.
[2022-01-10 20:22:42,156 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 20:22:42,157 INFO  L276                IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions.
[2022-01-10 20:22:42,157 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 13
[2022-01-10 20:22:42,158 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 20:22:42,158 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 20:22:42,160 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2022-01-10 20:22:42,161 INFO  L402      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 20:22:42,166 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 20:22:42,166 INFO  L85        PathProgramCache]: Analyzing trace with hash 110682993, now seen corresponding path program 1 times
[2022-01-10 20:22:42,167 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 20:22:42,167 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853879283]
[2022-01-10 20:22:42,167 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 20:22:42,167 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 20:22:42,203 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 20:22:42,250 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 20:22:42,250 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 20:22:42,251 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853879283]
[2022-01-10 20:22:42,251 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853879283] provided 0 perfect and 1 imperfect interpolant sequences
[2022-01-10 20:22:42,251 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126887440]
[2022-01-10 20:22:42,252 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 20:22:42,252 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-10 20:22:42,252 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-10 20:22:42,254 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-01-10 20:22:42,256 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2022-01-10 20:22:42,329 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 20:22:42,331 INFO  L263         TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 6 conjunts are in the unsatisfiable core
[2022-01-10 20:22:42,338 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 20:22:42,409 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 20:22:42,409 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-01-10 20:22:42,497 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 20:22:42,498 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126887440] provided 0 perfect and 2 imperfect interpolant sequences
[2022-01-10 20:22:42,498 INFO  L186   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-01-10 20:22:42,498 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7
[2022-01-10 20:22:42,498 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400863569]
[2022-01-10 20:22:42,498 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-01-10 20:22:42,498 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2022-01-10 20:22:42,499 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-10 20:22:42,499 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2022-01-10 20:22:42,499 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42
[2022-01-10 20:22:42,499 INFO  L87              Difference]: Start difference. First operand 18 states and 22 transitions. Second operand  has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 20:22:42,551 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 20:22:42,551 INFO  L93              Difference]: Finished difference Result 47 states and 61 transitions.
[2022-01-10 20:22:42,553 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2022-01-10 20:22:42,553 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 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
[2022-01-10 20:22:42,553 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 20:22:42,554 INFO  L225             Difference]: With dead ends: 47
[2022-01-10 20:22:42,554 INFO  L226             Difference]: Without dead ends: 31
[2022-01-10 20:22:42,554 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56
[2022-01-10 20:22:42,555 INFO  L933         BasicCegarLoop]: 19 mSDtfsCounter, 32 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-01-10 20:22:42,557 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 73 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-01-10 20:22:42,558 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 31 states.
[2022-01-10 20:22:42,560 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24.
[2022-01-10 20:22:42,561 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 24 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 20:22:42,561 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions.
[2022-01-10 20:22:42,561 INFO  L78                 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 12
[2022-01-10 20:22:42,561 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 20:22:42,562 INFO  L470      AbstractCegarLoop]: Abstraction has 24 states and 28 transitions.
[2022-01-10 20:22:42,562 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 20:22:42,562 INFO  L276                IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions.
[2022-01-10 20:22:42,562 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 19
[2022-01-10 20:22:42,562 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 20:22:42,563 INFO  L514         BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 20:22:42,584 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2022-01-10 20:22:42,763 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 20:22:42,764 INFO  L402      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 20:22:42,764 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 20:22:42,764 INFO  L85        PathProgramCache]: Analyzing trace with hash -1665847337, now seen corresponding path program 2 times
[2022-01-10 20:22:42,765 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 20:22:42,765 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615756836]
[2022-01-10 20:22:42,765 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 20:22:42,765 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 20:22:42,807 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 20:22:42,941 INFO  L134       CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 20:22:42,941 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 20:22:42,942 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615756836]
[2022-01-10 20:22:42,942 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615756836] provided 0 perfect and 1 imperfect interpolant sequences
[2022-01-10 20:22:42,942 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681299654]
[2022-01-10 20:22:42,942 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2022-01-10 20:22:42,942 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-10 20:22:42,942 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-10 20:22:42,943 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-01-10 20:22:42,945 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2022-01-10 20:22:43,001 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2022-01-10 20:22:43,001 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-01-10 20:22:43,002 INFO  L263         TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 17 conjunts are in the unsatisfiable core
[2022-01-10 20:22:43,004 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 20:22:43,100 INFO  L134       CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 20:22:43,100 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-01-10 20:22:43,954 INFO  L134       CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 20:22:43,956 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681299654] provided 0 perfect and 2 imperfect interpolant sequences
[2022-01-10 20:22:43,956 INFO  L186   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-01-10 20:22:43,956 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 10] total 20
[2022-01-10 20:22:43,956 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710512517]
[2022-01-10 20:22:43,958 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-01-10 20:22:43,959 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 20 states
[2022-01-10 20:22:43,961 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-10 20:22:43,962 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants.
[2022-01-10 20:22:43,964 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380
[2022-01-10 20:22:43,964 INFO  L87              Difference]: Start difference. First operand 24 states and 28 transitions. Second operand  has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 20:22:44,866 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 20:22:44,866 INFO  L93              Difference]: Finished difference Result 91 states and 117 transitions.
[2022-01-10 20:22:44,866 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. 
[2022-01-10 20:22:44,867 INFO  L78                 Accepts]: Start accepts. Automaton has  has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 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 20:22:44,867 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 20:22:44,868 INFO  L225             Difference]: With dead ends: 91
[2022-01-10 20:22:44,868 INFO  L226             Difference]: Without dead ends: 69
[2022-01-10 20:22:44,869 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=372, Invalid=1268, Unknown=0, NotChecked=0, Total=1640
[2022-01-10 20:22:44,869 INFO  L933         BasicCegarLoop]: 27 mSDtfsCounter, 174 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2022-01-10 20:22:44,870 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 191 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time]
[2022-01-10 20:22:44,870 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 69 states.
[2022-01-10 20:22:44,877 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 38.
[2022-01-10 20:22:44,878 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 38 states, 37 states have (on average 1.135135135135135) internal successors, (42), 37 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 20:22:44,878 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions.
[2022-01-10 20:22:44,879 INFO  L78                 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 18
[2022-01-10 20:22:44,879 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 20:22:44,879 INFO  L470      AbstractCegarLoop]: Abstraction has 38 states and 42 transitions.
[2022-01-10 20:22:44,879 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 20:22:44,879 INFO  L276                IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions.
[2022-01-10 20:22:44,880 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 33
[2022-01-10 20:22:44,880 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 20:22:44,880 INFO  L514         BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 20:22:44,907 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 20:22:45,096 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 20:22:45,097 INFO  L402      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 20:22:45,098 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 20:22:45,098 INFO  L85        PathProgramCache]: Analyzing trace with hash 173136709, now seen corresponding path program 3 times
[2022-01-10 20:22:45,098 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 20:22:45,098 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647642874]
[2022-01-10 20:22:45,098 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 20:22:45,098 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 20:22:45,142 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 20:22:45,373 INFO  L134       CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 20:22:45,373 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 20:22:45,373 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647642874]
[2022-01-10 20:22:45,374 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647642874] provided 0 perfect and 1 imperfect interpolant sequences
[2022-01-10 20:22:45,374 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375586947]
[2022-01-10 20:22:45,374 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2022-01-10 20:22:45,374 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-10 20:22:45,374 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-10 20:22:45,375 INFO  L229       MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-01-10 20:22:45,378 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2022-01-10 20:22:45,473 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s)
[2022-01-10 20:22:45,473 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-01-10 20:22:45,475 INFO  L263         TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 46 conjunts are in the unsatisfiable core
[2022-01-10 20:22:45,477 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 20:22:45,681 INFO  L134       CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 20:22:45,681 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-01-10 20:22:48,932 INFO  L134       CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 20:22:48,933 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [375586947] provided 0 perfect and 2 imperfect interpolant sequences
[2022-01-10 20:22:48,933 INFO  L186   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-01-10 20:22:48,933 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 24] total 47
[2022-01-10 20:22:48,933 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546476748]
[2022-01-10 20:22:48,933 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-01-10 20:22:48,934 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 47 states
[2022-01-10 20:22:48,934 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-10 20:22:48,934 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants.
[2022-01-10 20:22:48,935 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=636, Invalid=1526, Unknown=0, NotChecked=0, Total=2162
[2022-01-10 20:22:48,935 INFO  L87              Difference]: Start difference. First operand 38 states and 42 transitions. Second operand  has 47 states, 47 states have (on average 1.6595744680851063) internal successors, (78), 47 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 20:23:07,115 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 20:23:07,115 INFO  L93              Difference]: Finished difference Result 113 states and 128 transitions.
[2022-01-10 20:23:07,116 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. 
[2022-01-10 20:23:07,116 INFO  L78                 Accepts]: Start accepts. Automaton has  has 47 states, 47 states have (on average 1.6595744680851063) internal successors, (78), 47 states have internal predecessors, (78), 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 32
[2022-01-10 20:23:07,116 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 20:23:07,117 INFO  L225             Difference]: With dead ends: 113
[2022-01-10 20:23:07,117 INFO  L226             Difference]: Without dead ends: 77
[2022-01-10 20:23:07,118 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1045 ImplicationChecksByTransitivity, 19.2s TimeCoverageRelationStatistics Valid=1136, Invalid=2286, Unknown=0, NotChecked=0, Total=3422
[2022-01-10 20:23:07,119 INFO  L933         BasicCegarLoop]: 18 mSDtfsCounter, 401 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time
[2022-01-10 20:23:07,119 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [401 Valid, 285 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time]
[2022-01-10 20:23:07,120 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 77 states.
[2022-01-10 20:23:07,131 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 70.
[2022-01-10 20:23:07,131 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 70 states, 69 states have (on average 1.0724637681159421) internal successors, (74), 69 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 20:23:07,132 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions.
[2022-01-10 20:23:07,132 INFO  L78                 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 32
[2022-01-10 20:23:07,132 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 20:23:07,132 INFO  L470      AbstractCegarLoop]: Abstraction has 70 states and 74 transitions.
[2022-01-10 20:23:07,133 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 47 states, 47 states have (on average 1.6595744680851063) internal successors, (78), 47 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 20:23:07,133 INFO  L276                IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions.
[2022-01-10 20:23:07,134 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 65
[2022-01-10 20:23:07,134 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 20:23:07,134 INFO  L514         BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 20:23:07,162 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 20:23:07,355 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 20:23:07,356 INFO  L402      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 20:23:07,356 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 20:23:07,356 INFO  L85        PathProgramCache]: Analyzing trace with hash 996710757, now seen corresponding path program 4 times
[2022-01-10 20:23:07,356 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 20:23:07,356 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362715675]
[2022-01-10 20:23:07,356 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 20:23:07,357 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 20:23:07,448 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 20:23:08,040 INFO  L134       CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 20:23:08,040 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 20:23:08,040 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362715675]
[2022-01-10 20:23:08,040 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362715675] provided 0 perfect and 1 imperfect interpolant sequences
[2022-01-10 20:23:08,041 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176552380]
[2022-01-10 20:23:08,041 INFO  L93    rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
[2022-01-10 20:23:08,041 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-10 20:23:08,041 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-10 20:23:08,045 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 20:23:08,045 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 20:23:08,334 INFO  L228   tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2022-01-10 20:23:08,334 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-01-10 20:23:08,337 INFO  L263         TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 106 conjunts are in the unsatisfiable core
[2022-01-10 20:23:08,340 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 20:23:09,204 INFO  L134       CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 20:23:09,204 INFO  L328         TraceCheckSpWp]: Computing backward predicates...