/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInlineTransformed.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_LAZY.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_9.c


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


This is Ultimate 0.2.2-dev-a10ec3b
[2022-01-10 14:32:05,941 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2022-01-10 14:32:05,942 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2022-01-10 14:32:06,009 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2022-01-10 14:32:06,010 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2022-01-10 14:32:06,012 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2022-01-10 14:32:06,015 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2022-01-10 14:32:06,019 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
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[2022-01-10 14:32:06,025 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
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[2022-01-10 14:32:06,026 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2022-01-10 14:32:06,026 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2022-01-10 14:32:06,026 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2022-01-10 14:32:06,027 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2022-01-10 14:32:06,028 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2022-01-10 14:32:06,028 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2022-01-10 14:32:06,028 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2022-01-10 14:32:06,029 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2022-01-10 14:32:06,030 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2022-01-10 14:32:06,031 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2022-01-10 14:32:06,033 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2022-01-10 14:32:06,036 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2022-01-10 14:32:06,037 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2022-01-10 14:32:06,043 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2022-01-10 14:32:06,044 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2022-01-10 14:32:06,044 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2022-01-10 14:32:06,045 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2022-01-10 14:32:06,045 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2022-01-10 14:32:06,046 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2022-01-10 14:32:06,046 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2022-01-10 14:32:06,047 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2022-01-10 14:32:06,049 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2022-01-10 14:32:06,049 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2022-01-10 14:32:06,050 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2022-01-10 14:32:06,051 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2022-01-10 14:32:06,051 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2022-01-10 14:32:06,051 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2022-01-10 14:32:06,051 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2022-01-10 14:32:06,052 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2022-01-10 14:32:06,053 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2022-01-10 14:32:06,054 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_LAZY.epf
[2022-01-10 14:32:06,081 INFO  L113        SettingsManager]: Loading preferences was successful
[2022-01-10 14:32:06,081 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2022-01-10 14:32:06,081 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2022-01-10 14:32:06,081 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2022-01-10 14:32:06,082 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2022-01-10 14:32:06,082 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2022-01-10 14:32:06,082 INFO  L138        SettingsManager]:  * Use SBE=true
[2022-01-10 14:32:06,083 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2022-01-10 14:32:06,083 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2022-01-10 14:32:06,083 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2022-01-10 14:32:06,083 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2022-01-10 14:32:06,083 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2022-01-10 14:32:06,083 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2022-01-10 14:32:06,084 INFO  L138        SettingsManager]:  * Adapt memory model on pointer casts if necessary=true
[2022-01-10 14:32:06,084 INFO  L138        SettingsManager]:  * Use bitvectors instead of ints=true
[2022-01-10 14:32:06,084 INFO  L138        SettingsManager]:  * Memory model=HoenickeLindenmann_4ByteResolution
[2022-01-10 14:32:06,084 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2022-01-10 14:32:06,084 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2022-01-10 14:32:06,084 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2022-01-10 14:32:06,084 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2022-01-10 14:32:06,084 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2022-01-10 14:32:06,085 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-01-10 14:32:06,085 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2022-01-10 14:32:06,085 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2022-01-10 14:32:06,085 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2022-01-10 14:32:06,085 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2022-01-10 14:32:06,086 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2022-01-10 14:32:06,086 INFO  L138        SettingsManager]:  * Large block encoding in concurrent analysis=OFF
[2022-01-10 14:32:06,086 INFO  L138        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2022-01-10 14:32:06,086 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2022-01-10 14:32:06,086 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2022-01-10 14:32:06,086 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2022-01-10 14:32:06,087 INFO  L136        SettingsManager]: Preferences of IcfgTransformer differ from their defaults:
[2022-01-10 14:32:06,087 INFO  L138        SettingsManager]:  * TransformationType=BV_TO_INT_LAZY
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int)
WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN;
[2022-01-10 14:32:06,278 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2022-01-10 14:32:06,308 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2022-01-10 14:32:06,310 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2022-01-10 14:32:06,311 INFO  L271        PluginConnector]: Initializing CDTParser...
[2022-01-10 14:32:06,311 INFO  L275        PluginConnector]: CDTParser initialized
[2022-01-10 14:32:06,312 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_9.c
[2022-01-10 14:32:06,360 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6a5aee02/12390d8740884f78a9f965bb5642c201/FLAG14b8aa866
[2022-01-10 14:32:06,778 INFO  L306              CDTParser]: Found 1 translation units.
[2022-01-10 14:32:06,779 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_9.c
[2022-01-10 14:32:06,787 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6a5aee02/12390d8740884f78a9f965bb5642c201/FLAG14b8aa866
[2022-01-10 14:32:07,209 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6a5aee02/12390d8740884f78a9f965bb5642c201
[2022-01-10 14:32:07,211 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2022-01-10 14:32:07,214 INFO  L131        ToolchainWalker]: Walking toolchain with 6 elements.
[2022-01-10 14:32:07,215 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2022-01-10 14:32:07,215 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2022-01-10 14:32:07,217 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2022-01-10 14:32:07,217 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 02:32:07" (1/1) ...
[2022-01-10 14:32:07,218 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19293868 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:32:07, skipping insertion in model container
[2022-01-10 14:32:07,218 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 02:32:07" (1/1) ...
[2022-01-10 14:32:07,223 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2022-01-10 14:32:07,231 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2022-01-10 14:32:07,388 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/mono-crafted_9.c[318,331]
[2022-01-10 14:32:07,396 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-01-10 14:32:07,405 INFO  L203         MainTranslator]: Completed pre-run
[2022-01-10 14:32:07,414 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/mono-crafted_9.c[318,331]
[2022-01-10 14:32:07,419 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-01-10 14:32:07,428 INFO  L208         MainTranslator]: Completed translation
[2022-01-10 14:32:07,428 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:32:07 WrapperNode
[2022-01-10 14:32:07,429 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2022-01-10 14:32:07,430 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2022-01-10 14:32:07,430 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2022-01-10 14:32:07,430 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2022-01-10 14:32:07,434 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:32:07" (1/1) ...
[2022-01-10 14:32:07,440 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:32:07" (1/1) ...
[2022-01-10 14:32:07,452 INFO  L137                Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 28
[2022-01-10 14:32:07,452 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2022-01-10 14:32:07,453 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2022-01-10 14:32:07,453 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2022-01-10 14:32:07,453 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2022-01-10 14:32:07,458 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:32:07" (1/1) ...
[2022-01-10 14:32:07,459 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:32:07" (1/1) ...
[2022-01-10 14:32:07,461 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:32:07" (1/1) ...
[2022-01-10 14:32:07,461 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:32:07" (1/1) ...
[2022-01-10 14:32:07,465 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:32:07" (1/1) ...
[2022-01-10 14:32:07,468 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:32:07" (1/1) ...
[2022-01-10 14:32:07,471 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:32:07" (1/1) ...
[2022-01-10 14:32:07,472 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2022-01-10 14:32:07,473 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2022-01-10 14:32:07,473 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2022-01-10 14:32:07,474 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2022-01-10 14:32:07,474 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:32:07" (1/1) ...
[2022-01-10 14:32:07,479 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-01-10 14:32:07,488 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-10 14:32:07,498 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2022-01-10 14:32:07,516 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2022-01-10 14:32:07,526 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2022-01-10 14:32:07,526 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2022-01-10 14:32:07,526 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2022-01-10 14:32:07,526 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1
[2022-01-10 14:32:07,570 INFO  L234             CfgBuilder]: Building ICFG
[2022-01-10 14:32:07,571 INFO  L260             CfgBuilder]: Building CFG for each procedure with an implementation
[2022-01-10 14:32:07,630 INFO  L275             CfgBuilder]: Performing block encoding
[2022-01-10 14:32:07,633 INFO  L294             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2022-01-10 14:32:07,633 INFO  L299             CfgBuilder]: Removed 1 assume(true) statements.
[2022-01-10 14:32:07,634 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 02:32:07 BoogieIcfgContainer
[2022-01-10 14:32:07,635 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2022-01-10 14:32:07,635 INFO  L113        PluginConnector]: ------------------------IcfgTransformer----------------------------
[2022-01-10 14:32:07,635 INFO  L271        PluginConnector]: Initializing IcfgTransformer...
[2022-01-10 14:32:07,636 INFO  L275        PluginConnector]: IcfgTransformer initialized
[2022-01-10 14:32:07,638 INFO  L185        PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 02:32:07" (1/1) ...
[2022-01-10 14:32:07,670 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 02:32:07 BasicIcfg
[2022-01-10 14:32:07,670 INFO  L132        PluginConnector]: ------------------------ END IcfgTransformer----------------------------
[2022-01-10 14:32:07,672 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2022-01-10 14:32:07,672 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2022-01-10 14:32:07,673 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2022-01-10 14:32:07,674 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 02:32:07" (1/4) ...
[2022-01-10 14:32:07,674 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@572713b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 02:32:07, skipping insertion in model container
[2022-01-10 14:32:07,674 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:32:07" (2/4) ...
[2022-01-10 14:32:07,674 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@572713b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 02:32:07, skipping insertion in model container
[2022-01-10 14:32:07,674 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 02:32:07" (3/4) ...
[2022-01-10 14:32:07,675 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@572713b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 02:32:07, skipping insertion in model container
[2022-01-10 14:32:07,675 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 02:32:07" (4/4) ...
[2022-01-10 14:32:07,675 INFO  L111   eAbstractionObserver]: Analyzing ICFG mono-crafted_9.cTransformedIcfg
[2022-01-10 14:32:07,678 INFO  L204   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2022-01-10 14:32:07,679 INFO  L163   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2022-01-10 14:32:07,742 INFO  L338      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2022-01-10 14:32:07,747 INFO  L339      AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR
[2022-01-10 14:32:07,747 INFO  L340      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2022-01-10 14:32:07,780 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 14:32:07,783 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 7
[2022-01-10 14:32:07,783 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 14:32:07,783 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1]
[2022-01-10 14:32:07,784 INFO  L402      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 14:32:07,787 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 14:32:07,787 INFO  L85        PathProgramCache]: Analyzing trace with hash 1923912807, now seen corresponding path program 1 times
[2022-01-10 14:32:07,792 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 14:32:07,792 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871118062]
[2022-01-10 14:32:07,793 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 14:32:07,793 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 14:32:07,881 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 14:32:07,926 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 14:32:07,927 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 14:32:07,928 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871118062]
[2022-01-10 14:32:07,928 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871118062] provided 1 perfect and 0 imperfect interpolant sequences
[2022-01-10 14:32:07,929 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-01-10 14:32:07,929 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2022-01-10 14:32:07,930 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670507517]
[2022-01-10 14:32:07,931 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-10 14:32:07,933 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 2 states
[2022-01-10 14:32:07,934 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-10 14:32:07,954 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2022-01-10 14:32:07,956 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2022-01-10 14:32:07,957 INFO  L87              Difference]: Start difference. First operand  has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand  has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 14:32:07,965 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 14:32:07,965 INFO  L93              Difference]: Finished difference Result 20 states and 23 transitions.
[2022-01-10 14:32:07,966 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. 
[2022-01-10 14:32:07,967 INFO  L78                 Accepts]: Start accepts. Automaton has  has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6
[2022-01-10 14:32:07,967 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 14:32:07,971 INFO  L225             Difference]: With dead ends: 20
[2022-01-10 14:32:07,971 INFO  L226             Difference]: Without dead ends: 8
[2022-01-10 14:32:07,973 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2022-01-10 14:32:07,976 INFO  L933         BasicCegarLoop]: 13 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, 13 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-01-10 14:32:07,976 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-01-10 14:32:07,987 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 8 states.
[2022-01-10 14:32:07,995 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8.
[2022-01-10 14:32:07,996 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 14:32:07,996 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions.
[2022-01-10 14:32:07,997 INFO  L78                 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6
[2022-01-10 14:32:07,997 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 14:32:07,998 INFO  L470      AbstractCegarLoop]: Abstraction has 8 states and 9 transitions.
[2022-01-10 14:32:07,998 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 14:32:07,999 INFO  L276                IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions.
[2022-01-10 14:32:07,999 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 7
[2022-01-10 14:32:08,000 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 14:32:08,000 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1]
[2022-01-10 14:32:08,000 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2022-01-10 14:32:08,000 INFO  L402      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 14:32:08,002 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 14:32:08,002 INFO  L85        PathProgramCache]: Analyzing trace with hash 1923942598, now seen corresponding path program 1 times
[2022-01-10 14:32:08,002 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 14:32:08,002 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107162624]
[2022-01-10 14:32:08,003 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 14:32:08,003 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 14:32:08,029 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 14:32:08,066 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 14:32:08,067 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 14:32:08,067 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107162624]
[2022-01-10 14:32:08,067 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107162624] provided 1 perfect and 0 imperfect interpolant sequences
[2022-01-10 14:32:08,067 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-01-10 14:32:08,067 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2022-01-10 14:32:08,067 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125354220]
[2022-01-10 14:32:08,068 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-10 14:32:08,068 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-01-10 14:32:08,068 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-10 14:32:08,069 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-01-10 14:32:08,069 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-01-10 14:32:08,069 INFO  L87              Difference]: Start difference. First operand 8 states and 9 transitions. Second operand  has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 14:32:08,104 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 14:32:08,104 INFO  L93              Difference]: Finished difference Result 16 states and 20 transitions.
[2022-01-10 14:32:08,104 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-01-10 14:32:08,104 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6
[2022-01-10 14:32:08,105 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 14:32:08,105 INFO  L225             Difference]: With dead ends: 16
[2022-01-10 14:32:08,105 INFO  L226             Difference]: Without dead ends: 10
[2022-01-10 14:32:08,105 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 14:32:08,106 INFO  L933         BasicCegarLoop]: 7 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-01-10 14:32:08,107 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 10 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-01-10 14:32:08,107 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10 states.
[2022-01-10 14:32:08,109 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10.
[2022-01-10 14:32:08,109 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 14:32:08,109 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions.
[2022-01-10 14:32:08,109 INFO  L78                 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6
[2022-01-10 14:32:08,109 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 14:32:08,109 INFO  L470      AbstractCegarLoop]: Abstraction has 10 states and 11 transitions.
[2022-01-10 14:32:08,110 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 14:32:08,110 INFO  L276                IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions.
[2022-01-10 14:32:08,110 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 9
[2022-01-10 14:32:08,110 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 14:32:08,110 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 14:32:08,110 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2022-01-10 14:32:08,110 INFO  L402      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 14:32:08,111 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 14:32:08,111 INFO  L85        PathProgramCache]: Analyzing trace with hash 2102299688, now seen corresponding path program 1 times
[2022-01-10 14:32:08,111 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 14:32:08,111 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967332030]
[2022-01-10 14:32:08,111 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 14:32:08,111 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 14:32:08,127 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 14:32:08,155 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 14:32:08,155 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 14:32:08,155 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967332030]
[2022-01-10 14:32:08,156 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967332030] provided 0 perfect and 1 imperfect interpolant sequences
[2022-01-10 14:32:08,156 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376420095]
[2022-01-10 14:32:08,156 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 14:32:08,156 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-10 14:32:08,156 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-10 14:32:08,157 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-01-10 14:32:08,158 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2022-01-10 14:32:08,200 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 14:32:08,201 INFO  L263         TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core
[2022-01-10 14:32:08,204 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 14:32:08,313 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 14:32:08,314 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-01-10 14:32:08,471 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 14:32:08,471 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [376420095] provided 0 perfect and 2 imperfect interpolant sequences
[2022-01-10 14:32:08,471 INFO  L186   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-01-10 14:32:08,471 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 6] total 10
[2022-01-10 14:32:08,472 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870414695]
[2022-01-10 14:32:08,472 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-01-10 14:32:08,472 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 10 states
[2022-01-10 14:32:08,472 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-10 14:32:08,472 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2022-01-10 14:32:08,473 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90
[2022-01-10 14:32:08,473 INFO  L87              Difference]: Start difference. First operand 10 states and 11 transitions. Second operand  has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 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 14:32:08,718 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 14:32:08,718 INFO  L93              Difference]: Finished difference Result 22 states and 28 transitions.
[2022-01-10 14:32:08,719 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2022-01-10 14:32:08,719 INFO  L78                 Accepts]: Start accepts. Automaton has  has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 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 8
[2022-01-10 14:32:08,719 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 14:32:08,719 INFO  L225             Difference]: With dead ends: 22
[2022-01-10 14:32:08,719 INFO  L226             Difference]: Without dead ends: 14
[2022-01-10 14:32:08,720 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156
[2022-01-10 14:32:08,721 INFO  L933         BasicCegarLoop]: 4 mSDtfsCounter, 10 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2022-01-10 14:32:08,721 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 16 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2022-01-10 14:32:08,721 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 14 states.
[2022-01-10 14:32:08,723 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13.
[2022-01-10 14:32:08,723 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 14:32:08,724 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions.
[2022-01-10 14:32:08,724 INFO  L78                 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 8
[2022-01-10 14:32:08,724 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 14:32:08,724 INFO  L470      AbstractCegarLoop]: Abstraction has 13 states and 14 transitions.
[2022-01-10 14:32:08,724 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 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 14:32:08,724 INFO  L276                IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions.
[2022-01-10 14:32:08,724 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 13
[2022-01-10 14:32:08,725 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 14:32:08,725 INFO  L514         BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 14:32:08,745 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2022-01-10 14:32:08,931 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-10 14:32:08,932 INFO  L402      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 14:32:08,932 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 14:32:08,932 INFO  L85        PathProgramCache]: Analyzing trace with hash 1933039853, now seen corresponding path program 1 times
[2022-01-10 14:32:08,932 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 14:32:08,932 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537935724]
[2022-01-10 14:32:08,933 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 14:32:08,933 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 14:32:08,965 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 14:32:09,026 INFO  L134       CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 14:32:09,026 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 14:32:09,026 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537935724]
[2022-01-10 14:32:09,026 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537935724] provided 0 perfect and 1 imperfect interpolant sequences
[2022-01-10 14:32:09,028 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677117945]
[2022-01-10 14:32:09,028 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 14:32:09,028 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-10 14:32:09,028 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-10 14:32:09,029 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-01-10 14:32:09,030 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2022-01-10 14:32:09,075 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 14:32:09,076 INFO  L263         TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjunts are in the unsatisfiable core
[2022-01-10 14:32:09,077 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 14:32:09,118 INFO  L134       CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 14:32:09,119 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-01-10 14:32:09,648 INFO  L134       CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 14:32:09,649 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677117945] provided 0 perfect and 2 imperfect interpolant sequences
[2022-01-10 14:32:09,649 INFO  L186   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-01-10 14:32:09,649 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 12
[2022-01-10 14:32:09,649 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047814986]
[2022-01-10 14:32:09,650 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-01-10 14:32:09,651 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 12 states
[2022-01-10 14:32:09,651 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-10 14:32:09,651 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants.
[2022-01-10 14:32:09,652 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132
[2022-01-10 14:32:09,652 INFO  L87              Difference]: Start difference. First operand 13 states and 14 transitions. Second operand  has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 14:32:16,907 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 14:32:16,907 INFO  L93              Difference]: Finished difference Result 28 states and 34 transitions.
[2022-01-10 14:32:16,908 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2022-01-10 14:32:16,908 INFO  L78                 Accepts]: Start accepts. Automaton has  has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12
[2022-01-10 14:32:16,908 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 14:32:16,909 INFO  L225             Difference]: With dead ends: 28
[2022-01-10 14:32:16,909 INFO  L226             Difference]: Without dead ends: 21
[2022-01-10 14:32:16,909 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210
[2022-01-10 14:32:16,910 INFO  L933         BasicCegarLoop]: 6 mSDtfsCounter, 15 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2022-01-10 14:32:16,910 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 17 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2022-01-10 14:32:16,910 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 21 states.
[2022-01-10 14:32:16,914 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21.
[2022-01-10 14:32:16,914 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 21 states, 20 states have (on average 1.1) internal successors, (22), 20 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 14:32:16,914 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions.
[2022-01-10 14:32:16,914 INFO  L78                 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 12
[2022-01-10 14:32:16,914 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 14:32:16,914 INFO  L470      AbstractCegarLoop]: Abstraction has 21 states and 22 transitions.
[2022-01-10 14:32:16,915 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 14:32:16,915 INFO  L276                IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions.
[2022-01-10 14:32:16,915 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 21
[2022-01-10 14:32:16,915 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 14:32:16,915 INFO  L514         BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 14:32:16,931 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0
[2022-01-10 14:32:17,131 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3
[2022-01-10 14:32:17,132 INFO  L402      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 14:32:17,132 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 14:32:17,132 INFO  L85        PathProgramCache]: Analyzing trace with hash 1781693813, now seen corresponding path program 2 times
[2022-01-10 14:32:17,132 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 14:32:17,132 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115045724]
[2022-01-10 14:32:17,132 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 14:32:17,133 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 14:32:17,169 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 14:32:17,273 INFO  L134       CoverageAnalysis]: Checked inductivity of 49 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 14:32:17,275 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 14:32:17,275 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115045724]
[2022-01-10 14:32:17,277 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115045724] provided 0 perfect and 1 imperfect interpolant sequences
[2022-01-10 14:32:17,277 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199347458]
[2022-01-10 14:32:17,279 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2022-01-10 14:32:17,280 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-10 14:32:17,280 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-10 14:32:17,282 INFO  L229       MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-01-10 14:32:17,283 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2022-01-10 14:32:17,379 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2022-01-10 14:32:17,379 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-01-10 14:32:17,380 INFO  L263         TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 21 conjunts are in the unsatisfiable core
[2022-01-10 14:32:17,381 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 14:32:17,475 INFO  L134       CoverageAnalysis]: Checked inductivity of 49 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 14:32:17,475 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-01-10 14:32:23,527 INFO  L134       CoverageAnalysis]: Checked inductivity of 49 backedges. 13 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 14:32:23,527 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199347458] provided 0 perfect and 2 imperfect interpolant sequences
[2022-01-10 14:32:23,527 INFO  L186   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-01-10 14:32:23,527 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 23
[2022-01-10 14:32:23,528 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001720527]
[2022-01-10 14:32:23,528 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-01-10 14:32:23,528 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 23 states
[2022-01-10 14:32:23,528 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-10 14:32:23,528 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants.
[2022-01-10 14:32:23,529 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=356, Unknown=0, NotChecked=0, Total=506
[2022-01-10 14:32:23,529 INFO  L87              Difference]: Start difference. First operand 21 states and 22 transitions. Second operand  has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 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 14:32:45,153 WARN  L228               SmtUtils]: Spent 19.05s on a formula simplification that was a NOOP. DAG size: 69 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)
[2022-01-10 14:33:00,255 WARN  L228               SmtUtils]: Spent 11.46s on a formula simplification that was a NOOP. DAG size: 64 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)
[2022-01-10 14:33:12,943 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 14:33:12,944 INFO  L93              Difference]: Finished difference Result 40 states and 53 transitions.
[2022-01-10 14:33:12,944 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. 
[2022-01-10 14:33:12,944 INFO  L78                 Accepts]: Start accepts. Automaton has  has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 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) Word has length 20
[2022-01-10 14:33:12,944 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 14:33:12,945 INFO  L225             Difference]: With dead ends: 40
[2022-01-10 14:33:12,945 INFO  L226             Difference]: Without dead ends: 33
[2022-01-10 14:33:12,946 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 51.6s TimeCoverageRelationStatistics Valid=276, Invalid=534, Unknown=2, NotChecked=0, Total=812
[2022-01-10 14:33:12,946 INFO  L933         BasicCegarLoop]: 4 mSDtfsCounter, 17 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time
[2022-01-10 14:33:12,947 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 29 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time]
[2022-01-10 14:33:12,947 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 33 states.
[2022-01-10 14:33:12,952 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33.
[2022-01-10 14:33:12,953 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 33 states, 32 states have (on average 1.21875) internal successors, (39), 32 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 14:33:12,953 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions.
[2022-01-10 14:33:12,953 INFO  L78                 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 20
[2022-01-10 14:33:12,953 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 14:33:12,953 INFO  L470      AbstractCegarLoop]: Abstraction has 33 states and 39 transitions.
[2022-01-10 14:33:12,954 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 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 14:33:12,954 INFO  L276                IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions.
[2022-01-10 14:33:12,954 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 33
[2022-01-10 14:33:12,954 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 14:33:12,954 INFO  L514         BasicCegarLoop]: trace histogram [13, 7, 6, 1, 1, 1, 1, 1, 1]
[2022-01-10 14:33:12,966 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0
[2022-01-10 14:33:13,155 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-10 14:33:13,155 INFO  L402      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 14:33:13,156 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 14:33:13,156 INFO  L85        PathProgramCache]: Analyzing trace with hash -2032020730, now seen corresponding path program 3 times
[2022-01-10 14:33:13,156 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 14:33:13,156 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71941763]
[2022-01-10 14:33:13,156 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 14:33:13,156 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 14:33:13,205 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 14:33:13,311 INFO  L134       CoverageAnalysis]: Checked inductivity of 169 backedges. 88 proven. 56 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked.
[2022-01-10 14:33:13,311 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 14:33:13,312 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71941763]
[2022-01-10 14:33:13,312 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71941763] provided 0 perfect and 1 imperfect interpolant sequences
[2022-01-10 14:33:13,312 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736216217]
[2022-01-10 14:33:13,312 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2022-01-10 14:33:13,312 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-10 14:33:13,312 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-10 14:33:13,313 INFO  L229       MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-01-10 14:33:13,314 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2022-01-10 14:33:14,765 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s)
[2022-01-10 14:33:14,765 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-01-10 14:33:14,768 INFO  L263         TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 41 conjunts are in the unsatisfiable core
[2022-01-10 14:33:14,770 INFO  L286         TraceCheckSpWp]: Computing forward predicates...