/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInlineTransformed.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_NONE.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/knuth_unwindbound1.i


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


This is Ultimate 0.2.2-dev-a10ec3b
[2022-01-10 20:50:48,188 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2022-01-10 20:50:48,189 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2022-01-10 20:50:48,222 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2022-01-10 20:50:48,222 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2022-01-10 20:50:48,223 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2022-01-10 20:50:48,224 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
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[2022-01-10 20:50:48,226 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2022-01-10 20:50:48,227 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
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[2022-01-10 20:50:48,228 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2022-01-10 20:50:48,228 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2022-01-10 20:50:48,229 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2022-01-10 20:50:48,239 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2022-01-10 20:50:48,240 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2022-01-10 20:50:48,240 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2022-01-10 20:50:48,267 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2022-01-10 20:50:48,273 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2022-01-10 20:50:48,278 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2022-01-10 20:50:48,278 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2022-01-10 20:50:48,281 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2022-01-10 20:50:48,281 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2022-01-10 20:50:48,282 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2022-01-10 20:50:48,283 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2022-01-10 20:50:48,283 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2022-01-10 20:50:48,284 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2022-01-10 20:50:48,284 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2022-01-10 20:50:48,284 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2022-01-10 20:50:48,285 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2022-01-10 20:50:48,285 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2022-01-10 20:50:48,285 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2022-01-10 20:50:48,286 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2022-01-10 20:50:48,286 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2022-01-10 20:50:48,287 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2022-01-10 20:50:48,287 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2022-01-10 20:50:48,287 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2022-01-10 20:50:48,288 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2022-01-10 20:50:48,288 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2022-01-10 20:50:48,288 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2022-01-10 20:50:48,289 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2022-01-10 20:50:48,295 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_NONE.epf
[2022-01-10 20:50:48,309 INFO  L113        SettingsManager]: Loading preferences was successful
[2022-01-10 20:50:48,309 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2022-01-10 20:50:48,309 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2022-01-10 20:50:48,309 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2022-01-10 20:50:48,310 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2022-01-10 20:50:48,310 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2022-01-10 20:50:48,310 INFO  L138        SettingsManager]:  * Use SBE=true
[2022-01-10 20:50:48,310 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2022-01-10 20:50:48,311 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2022-01-10 20:50:48,311 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2022-01-10 20:50:48,311 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2022-01-10 20:50:48,311 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2022-01-10 20:50:48,311 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2022-01-10 20:50:48,311 INFO  L138        SettingsManager]:  * Adapt memory model on pointer casts if necessary=true
[2022-01-10 20:50:48,311 INFO  L138        SettingsManager]:  * Use bitvectors instead of ints=true
[2022-01-10 20:50:48,311 INFO  L138        SettingsManager]:  * Memory model=HoenickeLindenmann_4ByteResolution
[2022-01-10 20:50:48,311 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2022-01-10 20:50:48,311 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2022-01-10 20:50:48,311 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2022-01-10 20:50:48,311 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2022-01-10 20:50:48,312 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2022-01-10 20:50:48,312 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-01-10 20:50:48,312 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2022-01-10 20:50:48,312 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2022-01-10 20:50:48,312 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2022-01-10 20:50:48,312 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2022-01-10 20:50:48,312 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2022-01-10 20:50:48,312 INFO  L138        SettingsManager]:  * Large block encoding in concurrent analysis=OFF
[2022-01-10 20:50:48,312 INFO  L138        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2022-01-10 20:50:48,312 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2022-01-10 20:50:48,313 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2022-01-10 20:50:48,313 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2022-01-10 20:50:48,313 INFO  L136        SettingsManager]: Preferences of IcfgTransformer differ from their defaults:
[2022-01-10 20:50:48,313 INFO  L138        SettingsManager]:  * TransformationType=BV_TO_INT_NONE
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int)
WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN;
[2022-01-10 20:50:48,512 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2022-01-10 20:50:48,528 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2022-01-10 20:50:48,530 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2022-01-10 20:50:48,531 INFO  L271        PluginConnector]: Initializing CDTParser...
[2022-01-10 20:50:48,532 INFO  L275        PluginConnector]: CDTParser initialized
[2022-01-10 20:50:48,533 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/knuth_unwindbound1.i
[2022-01-10 20:50:48,594 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f69d39fd/94402ac712da4dfb897035a289910a7b/FLAG9132cab3e
[2022-01-10 20:50:48,944 INFO  L306              CDTParser]: Found 1 translation units.
[2022-01-10 20:50:48,944 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/knuth_unwindbound1.i
[2022-01-10 20:50:48,949 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f69d39fd/94402ac712da4dfb897035a289910a7b/FLAG9132cab3e
[2022-01-10 20:50:48,956 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f69d39fd/94402ac712da4dfb897035a289910a7b
[2022-01-10 20:50:48,957 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2022-01-10 20:50:48,958 INFO  L131        ToolchainWalker]: Walking toolchain with 6 elements.
[2022-01-10 20:50:48,959 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2022-01-10 20:50:48,959 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2022-01-10 20:50:48,961 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2022-01-10 20:50:48,961 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 08:50:48" (1/1) ...
[2022-01-10 20:50:48,962 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a8c82e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:50:48, skipping insertion in model container
[2022-01-10 20:50:48,962 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 08:50:48" (1/1) ...
[2022-01-10 20:50:48,966 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2022-01-10 20:50:48,981 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2022-01-10 20:50:49,115 WARN  L230   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/knuth_unwindbound1.i[948,961]
[2022-01-10 20:50:49,142 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-01-10 20:50:49,149 INFO  L203         MainTranslator]: Completed pre-run
[2022-01-10 20:50:49,156 WARN  L230   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/knuth_unwindbound1.i[948,961]
[2022-01-10 20:50:49,166 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-01-10 20:50:49,174 INFO  L208         MainTranslator]: Completed translation
[2022-01-10 20:50:49,175 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:50:49 WrapperNode
[2022-01-10 20:50:49,175 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2022-01-10 20:50:49,176 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2022-01-10 20:50:49,176 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2022-01-10 20:50:49,176 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2022-01-10 20:50:49,185 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:50:49" (1/1) ...
[2022-01-10 20:50:49,190 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:50:49" (1/1) ...
[2022-01-10 20:50:49,203 INFO  L137                Inliner]: procedures = 18, calls = 12, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 95
[2022-01-10 20:50:49,203 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2022-01-10 20:50:49,204 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2022-01-10 20:50:49,204 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2022-01-10 20:50:49,204 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2022-01-10 20:50:49,208 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:50:49" (1/1) ...
[2022-01-10 20:50:49,208 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:50:49" (1/1) ...
[2022-01-10 20:50:49,210 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:50:49" (1/1) ...
[2022-01-10 20:50:49,210 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:50:49" (1/1) ...
[2022-01-10 20:50:49,214 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:50:49" (1/1) ...
[2022-01-10 20:50:49,216 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:50:49" (1/1) ...
[2022-01-10 20:50:49,217 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:50:49" (1/1) ...
[2022-01-10 20:50:49,219 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2022-01-10 20:50:49,219 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2022-01-10 20:50:49,220 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2022-01-10 20:50:49,220 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2022-01-10 20:50:49,220 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:50:49" (1/1) ...
[2022-01-10 20:50:49,233 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-01-10 20:50:49,244 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-10 20:50:49,252 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2022-01-10 20:50:49,253 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2022-01-10 20:50:49,277 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2022-01-10 20:50:49,277 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1
[2022-01-10 20:50:49,277 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2022-01-10 20:50:49,277 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2022-01-10 20:50:49,326 INFO  L234             CfgBuilder]: Building ICFG
[2022-01-10 20:50:49,327 INFO  L260             CfgBuilder]: Building CFG for each procedure with an implementation
[2022-01-10 20:50:49,802 INFO  L275             CfgBuilder]: Performing block encoding
[2022-01-10 20:50:49,806 INFO  L294             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2022-01-10 20:50:49,806 INFO  L299             CfgBuilder]: Removed 1 assume(true) statements.
[2022-01-10 20:50:49,807 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 08:50:49 BoogieIcfgContainer
[2022-01-10 20:50:49,807 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2022-01-10 20:50:49,808 INFO  L113        PluginConnector]: ------------------------IcfgTransformer----------------------------
[2022-01-10 20:50:49,808 INFO  L271        PluginConnector]: Initializing IcfgTransformer...
[2022-01-10 20:50:49,808 INFO  L275        PluginConnector]: IcfgTransformer initialized
[2022-01-10 20:50:49,810 INFO  L185        PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 08:50:49" (1/1) ...
[2022-01-10 20:50:49,857 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 08:50:49 BasicIcfg
[2022-01-10 20:50:49,858 INFO  L132        PluginConnector]: ------------------------ END IcfgTransformer----------------------------
[2022-01-10 20:50:49,858 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2022-01-10 20:50:49,859 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2022-01-10 20:50:49,869 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2022-01-10 20:50:49,869 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 08:50:48" (1/4) ...
[2022-01-10 20:50:49,869 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e1dcd12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 08:50:49, skipping insertion in model container
[2022-01-10 20:50:49,869 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:50:49" (2/4) ...
[2022-01-10 20:50:49,870 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e1dcd12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 08:50:49, skipping insertion in model container
[2022-01-10 20:50:49,870 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 08:50:49" (3/4) ...
[2022-01-10 20:50:49,870 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e1dcd12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 08:50:49, skipping insertion in model container
[2022-01-10 20:50:49,870 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 08:50:49" (4/4) ...
[2022-01-10 20:50:49,871 INFO  L111   eAbstractionObserver]: Analyzing ICFG knuth_unwindbound1.iTransformedIcfg
[2022-01-10 20:50:49,874 INFO  L204   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2022-01-10 20:50:49,874 INFO  L163   ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations.
[2022-01-10 20:50:49,914 INFO  L338      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2022-01-10 20:50:49,923 INFO  L339      AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR
[2022-01-10 20:50:49,923 INFO  L340      AbstractCegarLoop]: Starting to check reachability of 4 error locations.
[2022-01-10 20:50:49,933 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 32 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 31 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 20:50:49,935 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 11
[2022-01-10 20:50:49,935 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 20:50:49,936 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 20:50:49,937 INFO  L402      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] ===
[2022-01-10 20:50:49,941 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 20:50:49,941 INFO  L85        PathProgramCache]: Analyzing trace with hash -201335764, now seen corresponding path program 1 times
[2022-01-10 20:50:49,948 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 20:50:49,949 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126533067]
[2022-01-10 20:50:49,949 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 20:50:49,950 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 20:50:50,039 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 20:50:50,086 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 20:50:50,086 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 20:50:50,086 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126533067]
[2022-01-10 20:50:50,087 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126533067] provided 1 perfect and 0 imperfect interpolant sequences
[2022-01-10 20:50:50,087 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-01-10 20:50:50,088 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2022-01-10 20:50:50,089 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16946125]
[2022-01-10 20:50:50,089 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-10 20:50:50,091 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 2 states
[2022-01-10 20:50:50,092 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-10 20:50:50,114 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2022-01-10 20:50:50,115 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2022-01-10 20:50:50,117 INFO  L87              Difference]: Start difference. First operand  has 32 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 31 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand  has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 20:50:50,130 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 20:50:50,130 INFO  L93              Difference]: Finished difference Result 61 states and 82 transitions.
[2022-01-10 20:50:50,131 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. 
[2022-01-10 20:50:50,132 INFO  L78                 Accepts]: Start accepts. Automaton has  has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10
[2022-01-10 20:50:50,132 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 20:50:50,139 INFO  L225             Difference]: With dead ends: 61
[2022-01-10 20:50:50,139 INFO  L226             Difference]: Without dead ends: 28
[2022-01-10 20:50:50,141 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2022-01-10 20:50:50,144 INFO  L933         BasicCegarLoop]: 36 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, 36 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-01-10 20:50:50,145 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-01-10 20:50:50,160 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 28 states.
[2022-01-10 20:50:50,170 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28.
[2022-01-10 20:50:50,171 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 28 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 27 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 20:50:50,172 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions.
[2022-01-10 20:50:50,173 INFO  L78                 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 10
[2022-01-10 20:50:50,173 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 20:50:50,174 INFO  L470      AbstractCegarLoop]: Abstraction has 28 states and 31 transitions.
[2022-01-10 20:50:50,174 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 20:50:50,175 INFO  L276                IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions.
[2022-01-10 20:50:50,176 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 11
[2022-01-10 20:50:50,176 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 20:50:50,176 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 20:50:50,177 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2022-01-10 20:50:50,177 INFO  L402      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] ===
[2022-01-10 20:50:50,178 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 20:50:50,179 INFO  L85        PathProgramCache]: Analyzing trace with hash 1570103722, now seen corresponding path program 1 times
[2022-01-10 20:50:50,179 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 20:50:50,179 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076749260]
[2022-01-10 20:50:50,179 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 20:50:50,180 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 20:50:50,210 ERROR L247   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-01-10 20:50:50,211 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1504814366]
[2022-01-10 20:50:50,211 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 20:50:50,211 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-10 20:50:50,212 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-10 20:50:50,216 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-01-10 20:50:50,217 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2022-01-10 20:50:56,746 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 20:50:56,751 INFO  L263         TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 26 conjunts are in the unsatisfiable core
[2022-01-10 20:50:56,764 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 20:50:58,301 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 20:50:58,301 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2022-01-10 20:50:58,302 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 20:50:58,302 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076749260]
[2022-01-10 20:50:58,302 WARN  L312   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-01-10 20:50:58,302 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504814366]
[2022-01-10 20:50:58,302 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504814366] provided 1 perfect and 0 imperfect interpolant sequences
[2022-01-10 20:50:58,302 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-01-10 20:50:58,302 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2022-01-10 20:50:58,303 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031894473]
[2022-01-10 20:50:58,303 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-10 20:50:58,303 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2022-01-10 20:50:58,304 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-10 20:50:58,304 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2022-01-10 20:50:58,304 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56
[2022-01-10 20:50:58,304 INFO  L87              Difference]: Start difference. First operand 28 states and 31 transitions. Second operand  has 8 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 20:51:01,999 WARN  L534   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []
[2022-01-10 20:51:04,445 WARN  L534   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []
[2022-01-10 20:51:06,908 WARN  L534   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []
[2022-01-10 20:51:09,587 WARN  L534   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []
[2022-01-10 20:51:09,987 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 20:51:09,987 INFO  L93              Difference]: Finished difference Result 74 states and 83 transitions.
[2022-01-10 20:51:09,987 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2022-01-10 20:51:09,988 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10
[2022-01-10 20:51:09,988 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 20:51:09,988 INFO  L225             Difference]: With dead ends: 74
[2022-01-10 20:51:09,989 INFO  L226             Difference]: Without dead ends: 72
[2022-01-10 20:51:09,989 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156
[2022-01-10 20:51:09,990 INFO  L933         BasicCegarLoop]: 17 mSDtfsCounter, 154 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 45 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.0s IncrementalHoareTripleChecker+Time
[2022-01-10 20:51:09,990 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 88 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 49 Invalid, 4 Unknown, 0 Unchecked, 11.0s Time]
[2022-01-10 20:51:09,991 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 72 states.
[2022-01-10 20:51:09,995 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 31.
[2022-01-10 20:51:09,995 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 31 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 30 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 20:51:09,996 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions.
[2022-01-10 20:51:09,996 INFO  L78                 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 10
[2022-01-10 20:51:09,996 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 20:51:09,996 INFO  L470      AbstractCegarLoop]: Abstraction has 31 states and 34 transitions.
[2022-01-10 20:51:09,996 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 20:51:09,996 INFO  L276                IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions.
[2022-01-10 20:51:09,997 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 13
[2022-01-10 20:51:09,997 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 20:51:09,997 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 20:51:10,006 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2022-01-10 20:51:10,203 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 20:51:10,204 INFO  L402      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] ===
[2022-01-10 20:51:10,204 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 20:51:10,204 INFO  L85        PathProgramCache]: Analyzing trace with hash 1336191469, now seen corresponding path program 1 times
[2022-01-10 20:51:10,204 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 20:51:10,205 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345793785]
[2022-01-10 20:51:10,205 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 20:51:10,205 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 20:51:10,219 ERROR L247   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-01-10 20:51:10,219 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [686741985]
[2022-01-10 20:51:10,219 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 20:51:10,219 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-10 20:51:10,219 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-10 20:51:10,222 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-01-10 20:51:10,223 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2022-01-10 20:51:10,306 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 20:51:10,308 INFO  L263         TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 5 conjunts are in the unsatisfiable core
[2022-01-10 20:51:10,309 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 20:51:10,356 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 20:51:10,357 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2022-01-10 20:51:10,357 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 20:51:10,357 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345793785]
[2022-01-10 20:51:10,357 WARN  L312   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-01-10 20:51:10,357 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686741985]
[2022-01-10 20:51:10,357 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [686741985] provided 1 perfect and 0 imperfect interpolant sequences
[2022-01-10 20:51:10,357 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-01-10 20:51:10,357 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2022-01-10 20:51:10,357 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604999282]
[2022-01-10 20:51:10,358 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-10 20:51:10,358 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2022-01-10 20:51:10,358 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-10 20:51:10,358 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2022-01-10 20:51:10,358 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2022-01-10 20:51:10,358 INFO  L87              Difference]: Start difference. First operand 31 states and 34 transitions. Second operand  has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 20:51:10,549 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 20:51:10,549 INFO  L93              Difference]: Finished difference Result 48 states and 54 transitions.
[2022-01-10 20:51:10,550 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2022-01-10 20:51:10,550 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12
[2022-01-10 20:51:10,550 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 20:51:10,550 INFO  L225             Difference]: With dead ends: 48
[2022-01-10 20:51:10,551 INFO  L226             Difference]: Without dead ends: 46
[2022-01-10 20:51:10,551 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2022-01-10 20:51:10,552 INFO  L933         BasicCegarLoop]: 29 mSDtfsCounter, 29 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2022-01-10 20:51:10,552 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 62 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2022-01-10 20:51:10,552 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 46 states.
[2022-01-10 20:51:10,556 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 33.
[2022-01-10 20:51:10,556 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 33 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 32 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 20:51:10,556 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions.
[2022-01-10 20:51:10,557 INFO  L78                 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 12
[2022-01-10 20:51:10,557 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 20:51:10,557 INFO  L470      AbstractCegarLoop]: Abstraction has 33 states and 36 transitions.
[2022-01-10 20:51:10,557 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 20:51:10,557 INFO  L276                IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions.
[2022-01-10 20:51:10,557 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 15
[2022-01-10 20:51:10,557 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 20:51:10,557 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 20:51:10,576 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0
[2022-01-10 20:51:10,767 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 20:51:10,768 INFO  L402      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] ===
[2022-01-10 20:51:10,768 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 20:51:10,768 INFO  L85        PathProgramCache]: Analyzing trace with hash -115184112, now seen corresponding path program 1 times
[2022-01-10 20:51:10,768 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 20:51:10,768 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959516162]
[2022-01-10 20:51:10,769 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 20:51:10,769 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 20:51:10,777 ERROR L247   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-01-10 20:51:10,778 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1749635266]
[2022-01-10 20:51:10,778 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 20:51:10,778 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-10 20:51:10,778 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-10 20:51:10,783 INFO  L229       MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-01-10 20:51:10,784 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2022-01-10 20:51:10,971 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 20:51:10,972 INFO  L263         TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 18 conjunts are in the unsatisfiable core
[2022-01-10 20:51:10,974 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 20:51:44,225 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 20:51:44,225 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2022-01-10 20:51:44,226 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 20:51:44,226 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959516162]
[2022-01-10 20:51:44,226 WARN  L312   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-01-10 20:51:44,226 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749635266]
[2022-01-10 20:51:44,226 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749635266] provided 1 perfect and 0 imperfect interpolant sequences
[2022-01-10 20:51:44,226 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-01-10 20:51:44,226 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2022-01-10 20:51:44,226 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081790709]
[2022-01-10 20:51:44,226 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-10 20:51:44,227 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2022-01-10 20:51:44,227 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-10 20:51:44,227 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2022-01-10 20:51:44,227 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56
[2022-01-10 20:51:44,227 INFO  L87              Difference]: Start difference. First operand 33 states and 36 transitions. Second operand  has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 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 20:51:46,259 WARN  L534   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []
[2022-01-10 20:52:03,191 WARN  L228               SmtUtils]: Spent 12.09s on a formula simplification. DAG size of input: 64 DAG size of output: 58 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)
[2022-01-10 20:52:05,526 WARN  L534   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []
[2022-01-10 20:52:08,320 WARN  L534   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []
[2022-01-10 20:52:09,595 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 20:52:09,595 INFO  L93              Difference]: Finished difference Result 46 states and 52 transitions.
[2022-01-10 20:52:09,595 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2022-01-10 20:52:09,595 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 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) Word has length 14
[2022-01-10 20:52:09,596 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 20:52:09,596 INFO  L225             Difference]: With dead ends: 46
[2022-01-10 20:52:09,596 INFO  L226             Difference]: Without dead ends: 42
[2022-01-10 20:52:09,598 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 28.9s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156
[2022-01-10 20:52:09,598 INFO  L933         BasicCegarLoop]: 16 mSDtfsCounter, 99 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 35 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time
[2022-01-10 20:52:09,599 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 46 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 49 Invalid, 2 Unknown, 0 Unchecked, 8.9s Time]
[2022-01-10 20:52:09,599 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 42 states.
[2022-01-10 20:52:09,605 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 37.
[2022-01-10 20:52:09,605 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 37 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 36 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 20:52:09,606 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions.
[2022-01-10 20:52:09,606 INFO  L78                 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 14
[2022-01-10 20:52:09,606 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 20:52:09,606 INFO  L470      AbstractCegarLoop]: Abstraction has 37 states and 40 transitions.
[2022-01-10 20:52:09,606 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 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 20:52:09,606 INFO  L276                IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions.
[2022-01-10 20:52:09,606 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 23
[2022-01-10 20:52:09,606 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 20:52:09,607 INFO  L514         BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 20:52:09,613 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0
[2022-01-10 20:52:09,807 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-10 20:52:09,807 INFO  L402      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] ===
[2022-01-10 20:52:09,808 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 20:52:09,808 INFO  L85        PathProgramCache]: Analyzing trace with hash -1443840389, now seen corresponding path program 1 times
[2022-01-10 20:52:09,808 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 20:52:09,808 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877985248]
[2022-01-10 20:52:09,808 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 20:52:09,808 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 20:52:09,824 ERROR L247   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-01-10 20:52:09,824 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [333483493]
[2022-01-10 20:52:09,824 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 20:52:09,824 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-10 20:52:09,824 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-10 20:52:09,827 INFO  L229       MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-01-10 20:52:09,827 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2022-01-10 20:52:10,055 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 20:52:10,056 INFO  L263         TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 9 conjunts are in the unsatisfiable core
[2022-01-10 20:52:10,062 INFO  L286         TraceCheckSpWp]: Computing forward predicates...