/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/recursive-simple/id_i20_o20-2.c


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


This is Ultimate 0.2.2-dev-a10ec3b
[2022-01-10 18:24:08,085 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2022-01-10 18:24:08,086 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2022-01-10 18:24:08,128 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2022-01-10 18:24:08,129 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2022-01-10 18:24:08,139 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2022-01-10 18:24:08,141 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2022-01-10 18:24:08,143 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2022-01-10 18:24:08,145 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2022-01-10 18:24:08,148 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
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[2022-01-10 18:24:08,150 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2022-01-10 18:24:08,150 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2022-01-10 18:24:08,152 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2022-01-10 18:24:08,153 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2022-01-10 18:24:08,155 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2022-01-10 18:24:08,155 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2022-01-10 18:24:08,156 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2022-01-10 18:24:08,157 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2022-01-10 18:24:08,158 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2022-01-10 18:24:08,159 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2022-01-10 18:24:08,164 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2022-01-10 18:24:08,165 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2022-01-10 18:24:08,166 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2022-01-10 18:24:08,171 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2022-01-10 18:24:08,171 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2022-01-10 18:24:08,171 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2022-01-10 18:24:08,172 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2022-01-10 18:24:08,173 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2022-01-10 18:24:08,173 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2022-01-10 18:24:08,173 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2022-01-10 18:24:08,174 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2022-01-10 18:24:08,175 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2022-01-10 18:24:08,175 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2022-01-10 18:24:08,176 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2022-01-10 18:24:08,176 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2022-01-10 18:24:08,177 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2022-01-10 18:24:08,177 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2022-01-10 18:24:08,177 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2022-01-10 18:24:08,177 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2022-01-10 18:24:08,178 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2022-01-10 18:24:08,179 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 18:24:08,201 INFO  L113        SettingsManager]: Loading preferences was successful
[2022-01-10 18:24:08,201 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2022-01-10 18:24:08,202 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2022-01-10 18:24:08,202 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2022-01-10 18:24:08,202 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2022-01-10 18:24:08,203 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2022-01-10 18:24:08,203 INFO  L138        SettingsManager]:  * Use SBE=true
[2022-01-10 18:24:08,203 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2022-01-10 18:24:08,203 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2022-01-10 18:24:08,203 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2022-01-10 18:24:08,204 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2022-01-10 18:24:08,204 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2022-01-10 18:24:08,204 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2022-01-10 18:24:08,204 INFO  L138        SettingsManager]:  * Adapt memory model on pointer casts if necessary=true
[2022-01-10 18:24:08,204 INFO  L138        SettingsManager]:  * Use bitvectors instead of ints=true
[2022-01-10 18:24:08,204 INFO  L138        SettingsManager]:  * Memory model=HoenickeLindenmann_4ByteResolution
[2022-01-10 18:24:08,204 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2022-01-10 18:24:08,204 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2022-01-10 18:24:08,204 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2022-01-10 18:24:08,204 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2022-01-10 18:24:08,205 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2022-01-10 18:24:08,205 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-01-10 18:24:08,205 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2022-01-10 18:24:08,206 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2022-01-10 18:24:08,206 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2022-01-10 18:24:08,206 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2022-01-10 18:24:08,206 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2022-01-10 18:24:08,206 INFO  L138        SettingsManager]:  * Large block encoding in concurrent analysis=OFF
[2022-01-10 18:24:08,206 INFO  L138        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2022-01-10 18:24:08,206 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2022-01-10 18:24:08,206 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2022-01-10 18:24:08,206 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2022-01-10 18:24:08,207 INFO  L136        SettingsManager]: Preferences of IcfgTransformer differ from their defaults:
[2022-01-10 18:24:08,207 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN;
[2022-01-10 18:24:08,380 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2022-01-10 18:24:08,404 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2022-01-10 18:24:08,406 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2022-01-10 18:24:08,406 INFO  L271        PluginConnector]: Initializing CDTParser...
[2022-01-10 18:24:08,407 INFO  L275        PluginConnector]: CDTParser initialized
[2022-01-10 18:24:08,408 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_i20_o20-2.c
[2022-01-10 18:24:08,447 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef1e7325b/3b4810688f73458883a89f0e7ab13cc1/FLAG270180155
[2022-01-10 18:24:08,749 INFO  L306              CDTParser]: Found 1 translation units.
[2022-01-10 18:24:08,749 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_i20_o20-2.c
[2022-01-10 18:24:08,754 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef1e7325b/3b4810688f73458883a89f0e7ab13cc1/FLAG270180155
[2022-01-10 18:24:09,188 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef1e7325b/3b4810688f73458883a89f0e7ab13cc1
[2022-01-10 18:24:09,189 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2022-01-10 18:24:09,190 INFO  L131        ToolchainWalker]: Walking toolchain with 6 elements.
[2022-01-10 18:24:09,191 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2022-01-10 18:24:09,191 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2022-01-10 18:24:09,193 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2022-01-10 18:24:09,194 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:24:09" (1/1) ...
[2022-01-10 18:24:09,194 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2daade92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:24:09, skipping insertion in model container
[2022-01-10 18:24:09,195 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:24:09" (1/1) ...
[2022-01-10 18:24:09,199 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2022-01-10 18:24:09,205 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2022-01-10 18:24:09,284 WARN  L230   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_i20_o20-2.c[454,467]
[2022-01-10 18:24:09,286 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-01-10 18:24:09,323 INFO  L203         MainTranslator]: Completed pre-run
[2022-01-10 18:24:09,334 WARN  L230   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_i20_o20-2.c[454,467]
[2022-01-10 18:24:09,335 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-01-10 18:24:09,345 INFO  L208         MainTranslator]: Completed translation
[2022-01-10 18:24:09,345 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:24:09 WrapperNode
[2022-01-10 18:24:09,346 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2022-01-10 18:24:09,346 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2022-01-10 18:24:09,346 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2022-01-10 18:24:09,346 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2022-01-10 18:24:09,352 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:24:09" (1/1) ...
[2022-01-10 18:24:09,358 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:24:09" (1/1) ...
[2022-01-10 18:24:09,367 INFO  L137                Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 18
[2022-01-10 18:24:09,368 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2022-01-10 18:24:09,368 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2022-01-10 18:24:09,368 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2022-01-10 18:24:09,368 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2022-01-10 18:24:09,373 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:24:09" (1/1) ...
[2022-01-10 18:24:09,374 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:24:09" (1/1) ...
[2022-01-10 18:24:09,376 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:24:09" (1/1) ...
[2022-01-10 18:24:09,376 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:24:09" (1/1) ...
[2022-01-10 18:24:09,379 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:24:09" (1/1) ...
[2022-01-10 18:24:09,380 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:24:09" (1/1) ...
[2022-01-10 18:24:09,384 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:24:09" (1/1) ...
[2022-01-10 18:24:09,386 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2022-01-10 18:24:09,387 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2022-01-10 18:24:09,387 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2022-01-10 18:24:09,387 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2022-01-10 18:24:09,388 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:24:09" (1/1) ...
[2022-01-10 18:24:09,392 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-01-10 18:24:09,399 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-10 18:24:09,408 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 18:24:09,417 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 18:24:09,440 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2022-01-10 18:24:09,440 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2022-01-10 18:24:09,440 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2022-01-10 18:24:09,440 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1
[2022-01-10 18:24:09,440 INFO  L130     BoogieDeclarations]: Found specification of procedure id
[2022-01-10 18:24:09,440 INFO  L138     BoogieDeclarations]: Found implementation of procedure id
[2022-01-10 18:24:09,484 INFO  L234             CfgBuilder]: Building ICFG
[2022-01-10 18:24:09,484 INFO  L260             CfgBuilder]: Building CFG for each procedure with an implementation
[2022-01-10 18:24:09,556 INFO  L275             CfgBuilder]: Performing block encoding
[2022-01-10 18:24:09,560 INFO  L294             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2022-01-10 18:24:09,561 INFO  L299             CfgBuilder]: Removed 0 assume(true) statements.
[2022-01-10 18:24:09,562 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:24:09 BoogieIcfgContainer
[2022-01-10 18:24:09,562 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2022-01-10 18:24:09,562 INFO  L113        PluginConnector]: ------------------------IcfgTransformer----------------------------
[2022-01-10 18:24:09,562 INFO  L271        PluginConnector]: Initializing IcfgTransformer...
[2022-01-10 18:24:09,563 INFO  L275        PluginConnector]: IcfgTransformer initialized
[2022-01-10 18:24:09,565 INFO  L185        PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:24:09" (1/1) ...
[2022-01-10 18:24:09,619 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 06:24:09 BasicIcfg
[2022-01-10 18:24:09,619 INFO  L132        PluginConnector]: ------------------------ END IcfgTransformer----------------------------
[2022-01-10 18:24:09,620 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2022-01-10 18:24:09,620 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2022-01-10 18:24:09,622 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2022-01-10 18:24:09,622 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 06:24:09" (1/4) ...
[2022-01-10 18:24:09,622 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5192d490 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:24:09, skipping insertion in model container
[2022-01-10 18:24:09,623 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:24:09" (2/4) ...
[2022-01-10 18:24:09,623 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5192d490 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:24:09, skipping insertion in model container
[2022-01-10 18:24:09,623 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:24:09" (3/4) ...
[2022-01-10 18:24:09,623 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5192d490 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 06:24:09, skipping insertion in model container
[2022-01-10 18:24:09,623 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 06:24:09" (4/4) ...
[2022-01-10 18:24:09,624 INFO  L111   eAbstractionObserver]: Analyzing ICFG id_i20_o20-2.cTransformedIcfg
[2022-01-10 18:24:09,633 INFO  L204   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2022-01-10 18:24:09,634 INFO  L163   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2022-01-10 18:24:09,672 INFO  L338      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2022-01-10 18:24:09,687 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 18:24:09,687 INFO  L340      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2022-01-10 18:24:09,702 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2022-01-10 18:24:09,705 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 11
[2022-01-10 18:24:09,705 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 18:24:09,706 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 18:24:09,706 INFO  L402      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 18:24:09,709 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 18:24:09,710 INFO  L85        PathProgramCache]: Analyzing trace with hash 534385216, now seen corresponding path program 1 times
[2022-01-10 18:24:09,715 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 18:24:09,715 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204769483]
[2022-01-10 18:24:09,715 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 18:24:09,716 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 18:24:09,809 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 18:24:09,876 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2022-01-10 18:24:09,886 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 18:24:09,924 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 18:24:09,925 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 18:24:09,925 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204769483]
[2022-01-10 18:24:09,926 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204769483] provided 1 perfect and 0 imperfect interpolant sequences
[2022-01-10 18:24:09,926 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-01-10 18:24:09,926 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2022-01-10 18:24:09,927 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523748016]
[2022-01-10 18:24:09,927 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-10 18:24:09,930 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2022-01-10 18:24:09,930 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-10 18:24:09,951 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2022-01-10 18:24:09,952 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2022-01-10 18:24:09,953 INFO  L87              Difference]: Start difference. First operand  has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand  has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2022-01-10 18:24:10,002 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 18:24:10,002 INFO  L93              Difference]: Finished difference Result 25 states and 28 transitions.
[2022-01-10 18:24:10,003 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2022-01-10 18:24:10,004 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10
[2022-01-10 18:24:10,005 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 18:24:10,011 INFO  L225             Difference]: With dead ends: 25
[2022-01-10 18:24:10,011 INFO  L226             Difference]: Without dead ends: 15
[2022-01-10 18:24:10,013 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2022-01-10 18:24:10,018 INFO  L933         BasicCegarLoop]: 13 mSDtfsCounter, 11 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-01-10 18:24:10,018 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 36 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-01-10 18:24:10,028 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 15 states.
[2022-01-10 18:24:10,042 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15.
[2022-01-10 18:24:10,043 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 15 states, 10 states have (on average 1.1) internal successors, (11), 11 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3)
[2022-01-10 18:24:10,044 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions.
[2022-01-10 18:24:10,045 INFO  L78                 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10
[2022-01-10 18:24:10,045 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 18:24:10,046 INFO  L470      AbstractCegarLoop]: Abstraction has 15 states and 16 transitions.
[2022-01-10 18:24:10,046 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2022-01-10 18:24:10,046 INFO  L276                IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions.
[2022-01-10 18:24:10,047 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 17
[2022-01-10 18:24:10,047 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 18:24:10,047 INFO  L514         BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 18:24:10,048 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2022-01-10 18:24:10,048 INFO  L402      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 18:24:10,048 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 18:24:10,048 INFO  L85        PathProgramCache]: Analyzing trace with hash 38585541, now seen corresponding path program 1 times
[2022-01-10 18:24:10,048 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 18:24:10,048 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612473389]
[2022-01-10 18:24:10,049 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 18:24:10,049 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 18:24:10,090 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 18:24:10,129 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2022-01-10 18:24:10,152 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 18:24:10,201 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2022-01-10 18:24:10,205 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 18:24:10,223 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-01-10 18:24:10,223 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 18:24:10,223 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612473389]
[2022-01-10 18:24:10,223 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612473389] provided 0 perfect and 1 imperfect interpolant sequences
[2022-01-10 18:24:10,223 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992948570]
[2022-01-10 18:24:10,224 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 18:24:10,224 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-10 18:24:10,224 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-10 18:24:10,236 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 18:24:10,237 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 18:24:10,312 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 18:24:10,314 INFO  L263         TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 12 conjunts are in the unsatisfiable core
[2022-01-10 18:24:10,324 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 18:24:10,557 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2022-01-10 18:24:10,558 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-01-10 18:24:10,749 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2022-01-10 18:24:10,752 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992948570] provided 0 perfect and 2 imperfect interpolant sequences
[2022-01-10 18:24:10,752 INFO  L186   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-01-10 18:24:10,752 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17
[2022-01-10 18:24:10,753 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088382068]
[2022-01-10 18:24:10,753 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-01-10 18:24:10,754 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 17 states
[2022-01-10 18:24:10,754 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-10 18:24:10,755 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants.
[2022-01-10 18:24:10,756 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272
[2022-01-10 18:24:10,757 INFO  L87              Difference]: Start difference. First operand 15 states and 16 transitions. Second operand  has 17 states, 16 states have (on average 1.6875) internal successors, (27), 13 states have internal predecessors, (27), 3 states have call successors, (4), 1 states have call predecessors, (4), 6 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6)
[2022-01-10 18:24:11,040 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 18:24:11,040 INFO  L93              Difference]: Finished difference Result 27 states and 29 transitions.
[2022-01-10 18:24:11,040 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. 
[2022-01-10 18:24:11,041 INFO  L78                 Accepts]: Start accepts. Automaton has  has 17 states, 16 states have (on average 1.6875) internal successors, (27), 13 states have internal predecessors, (27), 3 states have call successors, (4), 1 states have call predecessors, (4), 6 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) Word has length 16
[2022-01-10 18:24:11,041 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 18:24:11,041 INFO  L225             Difference]: With dead ends: 27
[2022-01-10 18:24:11,041 INFO  L226             Difference]: Without dead ends: 21
[2022-01-10 18:24:11,042 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600
[2022-01-10 18:24:11,042 INFO  L933         BasicCegarLoop]: 9 mSDtfsCounter, 16 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-01-10 18:24:11,043 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 78 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-01-10 18:24:11,043 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 21 states.
[2022-01-10 18:24:11,046 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21.
[2022-01-10 18:24:11,046 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 21 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 15 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5)
[2022-01-10 18:24:11,047 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions.
[2022-01-10 18:24:11,047 INFO  L78                 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 16
[2022-01-10 18:24:11,047 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 18:24:11,047 INFO  L470      AbstractCegarLoop]: Abstraction has 21 states and 22 transitions.
[2022-01-10 18:24:11,047 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 17 states, 16 states have (on average 1.6875) internal successors, (27), 13 states have internal predecessors, (27), 3 states have call successors, (4), 1 states have call predecessors, (4), 6 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6)
[2022-01-10 18:24:11,047 INFO  L276                IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions.
[2022-01-10 18:24:11,048 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 29
[2022-01-10 18:24:11,048 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 18:24:11,048 INFO  L514         BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 18:24:11,065 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 18:24:11,265 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-10 18:24:11,265 INFO  L402      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 18:24:11,266 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 18:24:11,266 INFO  L85        PathProgramCache]: Analyzing trace with hash -278563547, now seen corresponding path program 2 times
[2022-01-10 18:24:11,266 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 18:24:11,266 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085447026]
[2022-01-10 18:24:11,266 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 18:24:11,266 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 18:24:11,287 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 18:24:11,314 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2022-01-10 18:24:11,338 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 18:24:11,376 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2022-01-10 18:24:11,397 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 18:24:11,440 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2022-01-10 18:24:11,452 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 18:24:11,479 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2022-01-10 18:24:11,485 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 18:24:11,510 INFO  L134       CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked.
[2022-01-10 18:24:11,510 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 18:24:11,511 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085447026]
[2022-01-10 18:24:11,512 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085447026] provided 0 perfect and 1 imperfect interpolant sequences
[2022-01-10 18:24:11,512 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735545642]
[2022-01-10 18:24:11,512 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2022-01-10 18:24:11,514 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-10 18:24:11,514 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-10 18:24:11,515 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 18:24:11,522 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 18:24:11,574 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2022-01-10 18:24:11,574 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-01-10 18:24:11,587 INFO  L263         TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 20 conjunts are in the unsatisfiable core
[2022-01-10 18:24:11,588 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 18:24:12,361 INFO  L134       CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked.
[2022-01-10 18:24:12,362 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-01-10 18:24:12,849 INFO  L134       CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked.
[2022-01-10 18:24:12,850 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735545642] provided 0 perfect and 2 imperfect interpolant sequences
[2022-01-10 18:24:12,850 INFO  L186   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-01-10 18:24:12,850 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 27
[2022-01-10 18:24:12,850 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837216645]
[2022-01-10 18:24:12,850 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-01-10 18:24:12,851 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 27 states
[2022-01-10 18:24:12,851 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-10 18:24:12,851 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants.
[2022-01-10 18:24:12,851 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702
[2022-01-10 18:24:12,852 INFO  L87              Difference]: Start difference. First operand 21 states and 22 transitions. Second operand  has 27 states, 26 states have (on average 1.5) internal successors, (39), 19 states have internal predecessors, (39), 3 states have call successors, (4), 1 states have call predecessors, (4), 12 states have return successors, (12), 12 states have call predecessors, (12), 3 states have call successors, (12)
[2022-01-10 18:24:13,395 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 18:24:13,395 INFO  L93              Difference]: Finished difference Result 39 states and 43 transitions.
[2022-01-10 18:24:13,396 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. 
[2022-01-10 18:24:13,396 INFO  L78                 Accepts]: Start accepts. Automaton has  has 27 states, 26 states have (on average 1.5) internal successors, (39), 19 states have internal predecessors, (39), 3 states have call successors, (4), 1 states have call predecessors, (4), 12 states have return successors, (12), 12 states have call predecessors, (12), 3 states have call successors, (12) Word has length 28
[2022-01-10 18:24:13,396 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 18:24:13,397 INFO  L225             Difference]: With dead ends: 39
[2022-01-10 18:24:13,397 INFO  L226             Difference]: Without dead ends: 33
[2022-01-10 18:24:13,397 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=229, Invalid=1577, Unknown=0, NotChecked=0, Total=1806
[2022-01-10 18:24:13,398 INFO  L933         BasicCegarLoop]: 12 mSDtfsCounter, 18 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-01-10 18:24:13,398 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 170 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 150 Invalid, 0 Unknown, 14 Unchecked, 0.1s Time]
[2022-01-10 18:24:13,399 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 33 states.
[2022-01-10 18:24:13,402 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33.
[2022-01-10 18:24:13,402 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 33 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 23 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (9), 8 states have call predecessors, (9), 2 states have call successors, (9)
[2022-01-10 18:24:13,403 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions.
[2022-01-10 18:24:13,403 INFO  L78                 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 28
[2022-01-10 18:24:13,403 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 18:24:13,403 INFO  L470      AbstractCegarLoop]: Abstraction has 33 states and 34 transitions.
[2022-01-10 18:24:13,403 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 27 states, 26 states have (on average 1.5) internal successors, (39), 19 states have internal predecessors, (39), 3 states have call successors, (4), 1 states have call predecessors, (4), 12 states have return successors, (12), 12 states have call predecessors, (12), 3 states have call successors, (12)
[2022-01-10 18:24:13,403 INFO  L276                IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions.
[2022-01-10 18:24:13,404 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 53
[2022-01-10 18:24:13,404 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 18:24:13,404 INFO  L514         BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 18:24:13,424 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 18:24:13,622 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2
[2022-01-10 18:24:13,623 INFO  L402      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 18:24:13,623 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 18:24:13,623 INFO  L85        PathProgramCache]: Analyzing trace with hash -1798148635, now seen corresponding path program 3 times
[2022-01-10 18:24:13,623 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 18:24:13,623 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844723853]
[2022-01-10 18:24:13,624 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 18:24:13,624 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 18:24:13,643 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 18:24:13,688 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2022-01-10 18:24:13,702 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 18:24:13,741 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2022-01-10 18:24:13,770 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 18:24:13,793 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2022-01-10 18:24:13,804 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 18:24:13,825 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2022-01-10 18:24:13,833 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 18:24:13,852 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2022-01-10 18:24:13,859 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 18:24:13,878 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2022-01-10 18:24:13,883 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 18:24:13,918 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2022-01-10 18:24:13,921 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 18:24:13,939 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2022-01-10 18:24:13,941 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 18:24:13,968 INFO  L134       CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked.
[2022-01-10 18:24:13,969 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 18:24:13,969 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844723853]
[2022-01-10 18:24:13,969 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844723853] provided 0 perfect and 1 imperfect interpolant sequences
[2022-01-10 18:24:13,969 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341618293]
[2022-01-10 18:24:13,969 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2022-01-10 18:24:13,969 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-10 18:24:13,969 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-10 18:24:13,970 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 18:24:13,985 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 18:24:14,075 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s)
[2022-01-10 18:24:14,076 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-01-10 18:24:14,077 INFO  L263         TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 36 conjunts are in the unsatisfiable core
[2022-01-10 18:24:14,079 INFO  L286         TraceCheckSpWp]: Computing forward predicates...