/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInlineTransformed.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_LAZY.epf -i ../../../trunk/examples/svcomp/array-crafted/zero_sum3.c


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


This is Ultimate 0.2.2-dev-a10ec3b
[2022-01-10 15:33:41,822 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2022-01-10 15:33:41,824 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2022-01-10 15:33:41,875 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2022-01-10 15:33:41,876 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2022-01-10 15:33:41,878 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2022-01-10 15:33:41,880 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2022-01-10 15:33:41,881 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2022-01-10 15:33:41,883 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2022-01-10 15:33:41,886 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2022-01-10 15:33:41,887 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2022-01-10 15:33:41,887 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2022-01-10 15:33:41,888 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2022-01-10 15:33:41,889 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2022-01-10 15:33:41,890 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2022-01-10 15:33:41,892 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2022-01-10 15:33:41,892 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2022-01-10 15:33:41,893 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2022-01-10 15:33:41,895 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2022-01-10 15:33:41,900 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2022-01-10 15:33:41,901 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2022-01-10 15:33:41,902 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2022-01-10 15:33:41,903 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2022-01-10 15:33:41,903 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2022-01-10 15:33:41,908 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2022-01-10 15:33:41,908 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2022-01-10 15:33:41,908 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2022-01-10 15:33:41,909 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2022-01-10 15:33:41,909 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2022-01-10 15:33:41,910 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2022-01-10 15:33:41,910 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2022-01-10 15:33:41,910 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2022-01-10 15:33:41,911 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2022-01-10 15:33:41,912 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2022-01-10 15:33:41,913 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2022-01-10 15:33:41,913 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2022-01-10 15:33:41,913 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2022-01-10 15:33:41,913 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2022-01-10 15:33:41,913 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2022-01-10 15:33:41,914 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2022-01-10 15:33:41,914 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2022-01-10 15:33:41,915 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_LAZY.epf
[2022-01-10 15:33:41,935 INFO  L113        SettingsManager]: Loading preferences was successful
[2022-01-10 15:33:41,936 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2022-01-10 15:33:41,936 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2022-01-10 15:33:41,936 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2022-01-10 15:33:41,937 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2022-01-10 15:33:41,937 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2022-01-10 15:33:41,937 INFO  L138        SettingsManager]:  * Use SBE=true
[2022-01-10 15:33:41,937 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2022-01-10 15:33:41,937 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2022-01-10 15:33:41,937 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2022-01-10 15:33:41,938 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2022-01-10 15:33:41,938 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2022-01-10 15:33:41,938 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2022-01-10 15:33:41,938 INFO  L138        SettingsManager]:  * Adapt memory model on pointer casts if necessary=true
[2022-01-10 15:33:41,938 INFO  L138        SettingsManager]:  * Use bitvectors instead of ints=true
[2022-01-10 15:33:41,938 INFO  L138        SettingsManager]:  * Memory model=HoenickeLindenmann_4ByteResolution
[2022-01-10 15:33:41,938 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2022-01-10 15:33:41,938 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2022-01-10 15:33:41,938 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2022-01-10 15:33:41,939 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2022-01-10 15:33:41,939 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2022-01-10 15:33:41,939 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-01-10 15:33:41,940 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2022-01-10 15:33:41,940 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2022-01-10 15:33:41,940 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2022-01-10 15:33:41,940 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2022-01-10 15:33:41,940 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2022-01-10 15:33:41,940 INFO  L138        SettingsManager]:  * Large block encoding in concurrent analysis=OFF
[2022-01-10 15:33:41,940 INFO  L138        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2022-01-10 15:33:41,940 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2022-01-10 15:33:41,940 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2022-01-10 15:33:41,940 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2022-01-10 15:33:41,941 INFO  L136        SettingsManager]: Preferences of IcfgTransformer differ from their defaults:
[2022-01-10 15:33:41,941 INFO  L138        SettingsManager]:  * TransformationType=BV_TO_INT_LAZY
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int)
WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN;
[2022-01-10 15:33:42,112 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2022-01-10 15:33:42,137 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2022-01-10 15:33:42,139 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2022-01-10 15:33:42,140 INFO  L271        PluginConnector]: Initializing CDTParser...
[2022-01-10 15:33:42,140 INFO  L275        PluginConnector]: CDTParser initialized
[2022-01-10 15:33:42,141 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum3.c
[2022-01-10 15:33:42,180 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3c15dd8b/01f7e1f4a7204d4fa3596a77d1d2c93e/FLAG335c5c4a6
[2022-01-10 15:33:42,545 INFO  L306              CDTParser]: Found 1 translation units.
[2022-01-10 15:33:42,545 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum3.c
[2022-01-10 15:33:42,549 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3c15dd8b/01f7e1f4a7204d4fa3596a77d1d2c93e/FLAG335c5c4a6
[2022-01-10 15:33:42,971 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3c15dd8b/01f7e1f4a7204d4fa3596a77d1d2c93e
[2022-01-10 15:33:42,973 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2022-01-10 15:33:42,974 INFO  L131        ToolchainWalker]: Walking toolchain with 6 elements.
[2022-01-10 15:33:42,976 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2022-01-10 15:33:42,976 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2022-01-10 15:33:42,979 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2022-01-10 15:33:42,980 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 03:33:42" (1/1) ...
[2022-01-10 15:33:42,981 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62c80da2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:33:42, skipping insertion in model container
[2022-01-10 15:33:42,981 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 03:33:42" (1/1) ...
[2022-01-10 15:33:42,987 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2022-01-10 15:33:42,999 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2022-01-10 15:33:43,155 WARN  L230   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum3.c[400,413]
[2022-01-10 15:33:43,180 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-01-10 15:33:43,188 INFO  L203         MainTranslator]: Completed pre-run
[2022-01-10 15:33:43,197 WARN  L230   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum3.c[400,413]
[2022-01-10 15:33:43,226 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-01-10 15:33:43,236 INFO  L208         MainTranslator]: Completed translation
[2022-01-10 15:33:43,237 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:33:43 WrapperNode
[2022-01-10 15:33:43,237 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2022-01-10 15:33:43,238 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2022-01-10 15:33:43,238 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2022-01-10 15:33:43,238 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2022-01-10 15:33:43,242 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:33:43" (1/1) ...
[2022-01-10 15:33:43,254 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:33:43" (1/1) ...
[2022-01-10 15:33:43,273 INFO  L137                Inliner]: procedures = 17, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 103
[2022-01-10 15:33:43,273 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2022-01-10 15:33:43,274 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2022-01-10 15:33:43,274 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2022-01-10 15:33:43,274 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2022-01-10 15:33:43,280 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:33:43" (1/1) ...
[2022-01-10 15:33:43,280 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:33:43" (1/1) ...
[2022-01-10 15:33:43,284 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:33:43" (1/1) ...
[2022-01-10 15:33:43,285 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:33:43" (1/1) ...
[2022-01-10 15:33:43,301 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:33:43" (1/1) ...
[2022-01-10 15:33:43,304 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:33:43" (1/1) ...
[2022-01-10 15:33:43,308 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:33:43" (1/1) ...
[2022-01-10 15:33:43,311 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2022-01-10 15:33:43,312 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2022-01-10 15:33:43,313 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2022-01-10 15:33:43,313 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2022-01-10 15:33:43,314 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:33:43" (1/1) ...
[2022-01-10 15:33:43,318 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-01-10 15:33:43,326 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-10 15:33:43,335 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 15:33:43,353 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 15:33:43,362 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2022-01-10 15:33:43,362 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1
[2022-01-10 15:33:43,363 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2022-01-10 15:33:43,363 INFO  L130     BoogieDeclarations]: Found specification of procedure read~intINTTYPE2
[2022-01-10 15:33:43,363 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2022-01-10 15:33:43,363 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2022-01-10 15:33:43,363 INFO  L130     BoogieDeclarations]: Found specification of procedure write~intINTTYPE2
[2022-01-10 15:33:43,363 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2022-01-10 15:33:43,425 INFO  L234             CfgBuilder]: Building ICFG
[2022-01-10 15:33:43,427 INFO  L260             CfgBuilder]: Building CFG for each procedure with an implementation
[2022-01-10 15:33:43,565 INFO  L275             CfgBuilder]: Performing block encoding
[2022-01-10 15:33:43,569 INFO  L294             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2022-01-10 15:33:43,569 INFO  L299             CfgBuilder]: Removed 7 assume(true) statements.
[2022-01-10 15:33:43,570 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 03:33:43 BoogieIcfgContainer
[2022-01-10 15:33:43,570 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2022-01-10 15:33:43,571 INFO  L113        PluginConnector]: ------------------------IcfgTransformer----------------------------
[2022-01-10 15:33:43,571 INFO  L271        PluginConnector]: Initializing IcfgTransformer...
[2022-01-10 15:33:43,576 INFO  L275        PluginConnector]: IcfgTransformer initialized
[2022-01-10 15:33:43,578 INFO  L185        PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 03:33:43" (1/1) ...
[2022-01-10 15:33:43,755 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 03:33:43 BasicIcfg
[2022-01-10 15:33:43,755 INFO  L132        PluginConnector]: ------------------------ END IcfgTransformer----------------------------
[2022-01-10 15:33:43,756 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2022-01-10 15:33:43,756 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2022-01-10 15:33:43,758 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2022-01-10 15:33:43,759 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 03:33:42" (1/4) ...
[2022-01-10 15:33:43,759 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a387057 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 03:33:43, skipping insertion in model container
[2022-01-10 15:33:43,759 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:33:43" (2/4) ...
[2022-01-10 15:33:43,759 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a387057 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 03:33:43, skipping insertion in model container
[2022-01-10 15:33:43,759 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 03:33:43" (3/4) ...
[2022-01-10 15:33:43,760 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a387057 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 03:33:43, skipping insertion in model container
[2022-01-10 15:33:43,760 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 03:33:43" (4/4) ...
[2022-01-10 15:33:43,760 INFO  L111   eAbstractionObserver]: Analyzing ICFG zero_sum3.cTransformedIcfg
[2022-01-10 15:33:43,764 INFO  L204   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2022-01-10 15:33:43,764 INFO  L163   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2022-01-10 15:33:43,791 INFO  L338      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2022-01-10 15:33:43,797 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 15:33:43,797 INFO  L340      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2022-01-10 15:33:43,806 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 32 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 31 states have internal predecessors, (47), 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 15:33:43,810 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 20
[2022-01-10 15:33:43,810 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 15:33:43,810 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 15:33:43,810 INFO  L402      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 15:33:43,813 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 15:33:43,814 INFO  L85        PathProgramCache]: Analyzing trace with hash -1810874927, now seen corresponding path program 1 times
[2022-01-10 15:33:43,819 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 15:33:43,819 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298120844]
[2022-01-10 15:33:43,819 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 15:33:43,820 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 15:33:43,888 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 15:33:43,922 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 15:33:43,923 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 15:33:43,923 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298120844]
[2022-01-10 15:33:43,923 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298120844] provided 1 perfect and 0 imperfect interpolant sequences
[2022-01-10 15:33:43,924 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-01-10 15:33:43,924 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2022-01-10 15:33:43,925 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698111545]
[2022-01-10 15:33:43,925 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-10 15:33:43,928 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 2 states
[2022-01-10 15:33:43,928 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-10 15:33:43,944 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2022-01-10 15:33:43,944 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2022-01-10 15:33:43,946 INFO  L87              Difference]: Start difference. First operand  has 32 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 31 states have internal predecessors, (47), 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 9.5) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 15:33:43,956 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 15:33:43,956 INFO  L93              Difference]: Finished difference Result 59 states and 86 transitions.
[2022-01-10 15:33:43,956 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. 
[2022-01-10 15:33:43,957 INFO  L78                 Accepts]: Start accepts. Automaton has  has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19
[2022-01-10 15:33:43,957 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 15:33:43,962 INFO  L225             Difference]: With dead ends: 59
[2022-01-10 15:33:43,962 INFO  L226             Difference]: Without dead ends: 27
[2022-01-10 15:33:43,964 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 15:33:43,966 INFO  L933         BasicCegarLoop]: 39 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, 39 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 15:33:43,967 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-01-10 15:33:43,977 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 27 states.
[2022-01-10 15:33:43,984 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27.
[2022-01-10 15:33:43,985 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 27 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 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 15:33:43,985 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions.
[2022-01-10 15:33:43,986 INFO  L78                 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 19
[2022-01-10 15:33:43,986 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 15:33:43,986 INFO  L470      AbstractCegarLoop]: Abstraction has 27 states and 33 transitions.
[2022-01-10 15:33:43,986 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 15:33:43,986 INFO  L276                IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions.
[2022-01-10 15:33:43,987 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 20
[2022-01-10 15:33:43,987 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 15:33:43,987 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 15:33:43,987 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2022-01-10 15:33:43,987 INFO  L402      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 15:33:43,988 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 15:33:43,988 INFO  L85        PathProgramCache]: Analyzing trace with hash -926415733, now seen corresponding path program 1 times
[2022-01-10 15:33:43,988 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 15:33:43,988 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081844816]
[2022-01-10 15:33:43,989 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 15:33:43,989 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 15:33:44,031 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 15:33:44,079 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 15:33:44,079 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 15:33:44,079 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081844816]
[2022-01-10 15:33:44,080 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081844816] provided 1 perfect and 0 imperfect interpolant sequences
[2022-01-10 15:33:44,080 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-01-10 15:33:44,080 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2022-01-10 15:33:44,080 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218856273]
[2022-01-10 15:33:44,080 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-10 15:33:44,082 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2022-01-10 15:33:44,083 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-10 15:33:44,084 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2022-01-10 15:33:44,084 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2022-01-10 15:33:44,084 INFO  L87              Difference]: Start difference. First operand 27 states and 33 transitions. Second operand  has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 15:33:44,226 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 15:33:44,227 INFO  L93              Difference]: Finished difference Result 42 states and 53 transitions.
[2022-01-10 15:33:44,227 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2022-01-10 15:33:44,227 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19
[2022-01-10 15:33:44,227 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 15:33:44,228 INFO  L225             Difference]: With dead ends: 42
[2022-01-10 15:33:44,228 INFO  L226             Difference]: Without dead ends: 38
[2022-01-10 15:33:44,228 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2022-01-10 15:33:44,229 INFO  L933         BasicCegarLoop]: 26 mSDtfsCounter, 3 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-01-10 15:33:44,229 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 71 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-01-10 15:33:44,230 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 38 states.
[2022-01-10 15:33:44,233 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38.
[2022-01-10 15:33:44,233 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 38 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 37 states have internal predecessors, (49), 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 15:33:44,233 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 49 transitions.
[2022-01-10 15:33:44,234 INFO  L78                 Accepts]: Start accepts. Automaton has 38 states and 49 transitions. Word has length 19
[2022-01-10 15:33:44,234 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 15:33:44,234 INFO  L470      AbstractCegarLoop]: Abstraction has 38 states and 49 transitions.
[2022-01-10 15:33:44,234 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 15:33:44,234 INFO  L276                IsEmpty]: Start isEmpty. Operand 38 states and 49 transitions.
[2022-01-10 15:33:44,235 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2022-01-10 15:33:44,235 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 15:33:44,235 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 15:33:44,235 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2022-01-10 15:33:44,235 INFO  L402      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 15:33:44,235 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 15:33:44,235 INFO  L85        PathProgramCache]: Analyzing trace with hash -1197854259, now seen corresponding path program 1 times
[2022-01-10 15:33:44,236 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 15:33:44,236 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009216773]
[2022-01-10 15:33:44,236 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 15:33:44,236 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 15:33:44,276 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 15:33:44,328 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-01-10 15:33:44,328 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 15:33:44,328 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009216773]
[2022-01-10 15:33:44,329 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009216773] provided 1 perfect and 0 imperfect interpolant sequences
[2022-01-10 15:33:44,330 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-01-10 15:33:44,330 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2022-01-10 15:33:44,330 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134845427]
[2022-01-10 15:33:44,330 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-10 15:33:44,330 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-01-10 15:33:44,331 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-10 15:33:44,331 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-01-10 15:33:44,332 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-01-10 15:33:44,332 INFO  L87              Difference]: Start difference. First operand 38 states and 49 transitions. Second operand  has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 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 15:33:44,444 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 15:33:44,445 INFO  L93              Difference]: Finished difference Result 73 states and 95 transitions.
[2022-01-10 15:33:44,445 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-01-10 15:33:44,445 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21
[2022-01-10 15:33:44,446 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 15:33:44,446 INFO  L225             Difference]: With dead ends: 73
[2022-01-10 15:33:44,446 INFO  L226             Difference]: Without dead ends: 40
[2022-01-10 15:33:44,446 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-01-10 15:33:44,447 INFO  L933         BasicCegarLoop]: 31 mSDtfsCounter, 1 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-01-10 15:33:44,448 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 46 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-01-10 15:33:44,448 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 40 states.
[2022-01-10 15:33:44,451 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39.
[2022-01-10 15:33:44,451 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 39 states, 38 states have (on average 1.3157894736842106) internal successors, (50), 38 states have internal predecessors, (50), 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 15:33:44,452 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions.
[2022-01-10 15:33:44,452 INFO  L78                 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 21
[2022-01-10 15:33:44,452 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 15:33:44,452 INFO  L470      AbstractCegarLoop]: Abstraction has 39 states and 50 transitions.
[2022-01-10 15:33:44,452 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 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 15:33:44,452 INFO  L276                IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions.
[2022-01-10 15:33:44,453 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 24
[2022-01-10 15:33:44,453 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 15:33:44,453 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 15:33:44,453 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2022-01-10 15:33:44,453 INFO  L402      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 15:33:44,454 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 15:33:44,454 INFO  L85        PathProgramCache]: Analyzing trace with hash -1706677072, now seen corresponding path program 1 times
[2022-01-10 15:33:44,454 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 15:33:44,454 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196344244]
[2022-01-10 15:33:44,454 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 15:33:44,454 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 15:33:44,565 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 15:33:44,650 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2022-01-10 15:33:44,651 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 15:33:44,651 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196344244]
[2022-01-10 15:33:44,651 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196344244] provided 1 perfect and 0 imperfect interpolant sequences
[2022-01-10 15:33:44,651 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-01-10 15:33:44,651 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2022-01-10 15:33:44,651 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481450283]
[2022-01-10 15:33:44,651 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-10 15:33:44,652 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2022-01-10 15:33:44,652 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-10 15:33:44,652 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2022-01-10 15:33:44,652 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2022-01-10 15:33:44,652 INFO  L87              Difference]: Start difference. First operand 39 states and 50 transitions. Second operand  has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 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 15:33:44,886 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 15:33:44,886 INFO  L93              Difference]: Finished difference Result 68 states and 88 transitions.
[2022-01-10 15:33:44,887 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2022-01-10 15:33:44,887 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 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
[2022-01-10 15:33:44,887 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 15:33:44,887 INFO  L225             Difference]: With dead ends: 68
[2022-01-10 15:33:44,887 INFO  L226             Difference]: Without dead ends: 40
[2022-01-10 15:33:44,888 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2022-01-10 15:33:44,889 INFO  L933         BasicCegarLoop]: 13 mSDtfsCounter, 39 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2022-01-10 15:33:44,889 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 17 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2022-01-10 15:33:44,890 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 40 states.
[2022-01-10 15:33:44,897 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34.
[2022-01-10 15:33:44,897 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 33 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)
[2022-01-10 15:33:44,898 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions.
[2022-01-10 15:33:44,898 INFO  L78                 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 23
[2022-01-10 15:33:44,898 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 15:33:44,898 INFO  L470      AbstractCegarLoop]: Abstraction has 34 states and 40 transitions.
[2022-01-10 15:33:44,898 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 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 15:33:44,898 INFO  L276                IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions.
[2022-01-10 15:33:44,899 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 34
[2022-01-10 15:33:44,899 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 15:33:44,899 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 15:33:44,899 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2022-01-10 15:33:44,899 INFO  L402      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 15:33:44,900 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 15:33:44,900 INFO  L85        PathProgramCache]: Analyzing trace with hash -1054038149, now seen corresponding path program 1 times
[2022-01-10 15:33:44,900 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 15:33:44,900 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803187658]
[2022-01-10 15:33:44,900 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 15:33:44,900 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 15:33:45,017 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 15:33:45,098 INFO  L134       CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2022-01-10 15:33:45,098 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 15:33:45,098 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803187658]
[2022-01-10 15:33:45,098 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803187658] provided 0 perfect and 1 imperfect interpolant sequences
[2022-01-10 15:33:45,098 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562978131]
[2022-01-10 15:33:45,099 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 15:33:45,099 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-10 15:33:45,099 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-10 15:33:45,104 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 15:33:45,105 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 15:33:45,323 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 15:33:45,325 INFO  L263         TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 6 conjunts are in the unsatisfiable core
[2022-01-10 15:33:45,329 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 15:33:45,722 INFO  L134       CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2022-01-10 15:33:45,722 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-01-10 15:33:48,128 INFO  L134       CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2022-01-10 15:33:48,128 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562978131] provided 0 perfect and 2 imperfect interpolant sequences
[2022-01-10 15:33:48,129 INFO  L186   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-01-10 15:33:48,129 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6
[2022-01-10 15:33:48,129 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328615685]
[2022-01-10 15:33:48,129 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-01-10 15:33:48,129 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2022-01-10 15:33:48,130 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-10 15:33:48,130 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2022-01-10 15:33:48,130 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30
[2022-01-10 15:33:48,130 INFO  L87              Difference]: Start difference. First operand 34 states and 40 transitions. Second operand  has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 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 15:33:48,321 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 15:33:48,321 INFO  L93              Difference]: Finished difference Result 65 states and 77 transitions.
[2022-01-10 15:33:48,324 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2022-01-10 15:33:48,324 INFO  L78                 Accepts]: Start accepts. Automaton has  has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 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 33
[2022-01-10 15:33:48,324 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 15:33:48,325 INFO  L225             Difference]: With dead ends: 65
[2022-01-10 15:33:48,325 INFO  L226             Difference]: Without dead ends: 37
[2022-01-10 15:33:48,325 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30
[2022-01-10 15:33:48,326 INFO  L933         BasicCegarLoop]: 31 mSDtfsCounter, 2 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2022-01-10 15:33:48,326 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 76 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2022-01-10 15:33:48,326 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 37 states.
[2022-01-10 15:33:48,330 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36.
[2022-01-10 15:33:48,330 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 36 states, 35 states have (on average 1.2) internal successors, (42), 35 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 15:33:48,331 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions.
[2022-01-10 15:33:48,331 INFO  L78                 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 33
[2022-01-10 15:33:48,331 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 15:33:48,331 INFO  L470      AbstractCegarLoop]: Abstraction has 36 states and 42 transitions.
[2022-01-10 15:33:48,331 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 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 15:33:48,331 INFO  L276                IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions.
[2022-01-10 15:33:48,332 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 36
[2022-01-10 15:33:48,332 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 15:33:48,332 INFO  L514         BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 15:33:48,338 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 15:33:48,536 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-10 15:33:48,536 INFO  L402      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 15:33:48,537 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 15:33:48,537 INFO  L85        PathProgramCache]: Analyzing trace with hash -320838178, now seen corresponding path program 2 times
[2022-01-10 15:33:48,537 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 15:33:48,537 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274996012]
[2022-01-10 15:33:48,537 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 15:33:48,537 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 15:33:48,606 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 15:33:48,676 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked.
[2022-01-10 15:33:48,676 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 15:33:48,676 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274996012]
[2022-01-10 15:33:48,676 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274996012] provided 0 perfect and 1 imperfect interpolant sequences
[2022-01-10 15:33:48,676 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763915374]
[2022-01-10 15:33:48,676 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2022-01-10 15:33:48,676 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-10 15:33:48,677 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-10 15:33:48,677 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 15:33:48,678 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 15:33:48,798 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2022-01-10 15:33:48,799 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-01-10 15:33:48,801 INFO  L263         TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 10 conjunts are in the unsatisfiable core
[2022-01-10 15:33:48,802 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 15:33:49,317 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked.
[2022-01-10 15:33:49,317 INFO  L328         TraceCheckSpWp]: Computing backward predicates...