/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/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_valuebound2.c


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


This is Ultimate 0.2.2-dev-34549b5
[2022-04-06 06:08:02,287 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2022-04-06 06:08:02,289 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2022-04-06 06:08:02,323 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2022-04-06 06:08:02,323 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2022-04-06 06:08:02,324 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2022-04-06 06:08:02,326 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2022-04-06 06:08:02,328 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2022-04-06 06:08:02,329 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2022-04-06 06:08:02,332 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2022-04-06 06:08:02,333 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2022-04-06 06:08:02,334 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2022-04-06 06:08:02,334 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2022-04-06 06:08:02,336 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2022-04-06 06:08:02,336 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2022-04-06 06:08:02,338 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2022-04-06 06:08:02,339 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2022-04-06 06:08:02,339 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2022-04-06 06:08:02,341 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2022-04-06 06:08:02,345 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2022-04-06 06:08:02,346 INFO  L181        SettingsManager]: Resetting HornVerifier preferences to default values
[2022-04-06 06:08:02,347 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2022-04-06 06:08:02,347 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2022-04-06 06:08:02,348 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2022-04-06 06:08:02,349 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2022-04-06 06:08:02,353 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2022-04-06 06:08:02,353 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2022-04-06 06:08:02,354 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2022-04-06 06:08:02,354 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2022-04-06 06:08:02,354 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2022-04-06 06:08:02,356 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2022-04-06 06:08:02,356 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2022-04-06 06:08:02,357 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2022-04-06 06:08:02,357 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2022-04-06 06:08:02,358 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2022-04-06 06:08:02,358 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2022-04-06 06:08:02,358 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2022-04-06 06:08:02,359 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2022-04-06 06:08:02,359 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2022-04-06 06:08:02,359 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2022-04-06 06:08:02,360 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2022-04-06 06:08:02,361 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2022-04-06 06:08:02,361 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf
[2022-04-06 06:08:02,368 INFO  L113        SettingsManager]: Loading preferences was successful
[2022-04-06 06:08:02,369 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2022-04-06 06:08:02,369 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2022-04-06 06:08:02,369 INFO  L138        SettingsManager]:  * sizeof long=4
[2022-04-06 06:08:02,370 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2022-04-06 06:08:02,370 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2022-04-06 06:08:02,370 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2022-04-06 06:08:02,370 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2022-04-06 06:08:02,370 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2022-04-06 06:08:02,371 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2022-04-06 06:08:02,371 INFO  L138        SettingsManager]:  * sizeof long double=12
[2022-04-06 06:08:02,371 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2022-04-06 06:08:02,371 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2022-04-06 06:08:02,371 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2022-04-06 06:08:02,371 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2022-04-06 06:08:02,371 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2022-04-06 06:08:02,371 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2022-04-06 06:08:02,371 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2022-04-06 06:08:02,372 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-04-06 06:08:02,372 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2022-04-06 06:08:02,372 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2022-04-06 06:08:02,372 INFO  L136        SettingsManager]: Preferences of IcfgTransformer differ from their defaults:
[2022-04-06 06:08:02,372 INFO  L138        SettingsManager]:  * TransformationType=LOOP_ACCELERATION_JORDAN
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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN;
[2022-04-06 06:08:02,553 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2022-04-06 06:08:02,582 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2022-04-06 06:08:02,584 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2022-04-06 06:08:02,585 INFO  L271        PluginConnector]: Initializing CDTParser...
[2022-04-06 06:08:02,585 INFO  L275        PluginConnector]: CDTParser initialized
[2022-04-06 06:08:02,586 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_valuebound2.c
[2022-04-06 06:08:02,628 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/645f78848/dee9ad219bc14149b31f1acb6d469847/FLAGcaa2efdb6
[2022-04-06 06:08:02,999 INFO  L306              CDTParser]: Found 1 translation units.
[2022-04-06 06:08:02,999 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_valuebound2.c
[2022-04-06 06:08:03,004 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/645f78848/dee9ad219bc14149b31f1acb6d469847/FLAGcaa2efdb6
[2022-04-06 06:08:03,018 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/645f78848/dee9ad219bc14149b31f1acb6d469847
[2022-04-06 06:08:03,019 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2022-04-06 06:08:03,021 INFO  L131        ToolchainWalker]: Walking toolchain with 5 elements.
[2022-04-06 06:08:03,023 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2022-04-06 06:08:03,023 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2022-04-06 06:08:03,026 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2022-04-06 06:08:03,027 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 06:08:03" (1/1) ...
[2022-04-06 06:08:03,028 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72e7e52f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:08:03, skipping insertion in model container
[2022-04-06 06:08:03,028 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 06:08:03" (1/1) ...
[2022-04-06 06:08:03,033 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2022-04-06 06:08:03,043 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2022-04-06 06:08:03,187 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/cohendiv-ll_valuebound2.c[576,589]
[2022-04-06 06:08:03,205 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-04-06 06:08:03,212 INFO  L203         MainTranslator]: Completed pre-run
[2022-04-06 06:08:03,221 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/cohendiv-ll_valuebound2.c[576,589]
[2022-04-06 06:08:03,235 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-04-06 06:08:03,245 INFO  L208         MainTranslator]: Completed translation
[2022-04-06 06:08:03,246 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:08:03 WrapperNode
[2022-04-06 06:08:03,246 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2022-04-06 06:08:03,248 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2022-04-06 06:08:03,248 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2022-04-06 06:08:03,248 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2022-04-06 06:08:03,257 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:08:03" (1/1) ...
[2022-04-06 06:08:03,257 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:08:03" (1/1) ...
[2022-04-06 06:08:03,262 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:08:03" (1/1) ...
[2022-04-06 06:08:03,262 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:08:03" (1/1) ...
[2022-04-06 06:08:03,270 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:08:03" (1/1) ...
[2022-04-06 06:08:03,274 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:08:03" (1/1) ...
[2022-04-06 06:08:03,283 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:08:03" (1/1) ...
[2022-04-06 06:08:03,284 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2022-04-06 06:08:03,285 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2022-04-06 06:08:03,285 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2022-04-06 06:08:03,285 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2022-04-06 06:08:03,286 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:08:03" (1/1) ...
[2022-04-06 06:08:03,291 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-04-06 06:08:03,297 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-04-06 06:08:03,306 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)
[2022-04-06 06:08:03,333 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
[2022-04-06 06:08:03,341 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2022-04-06 06:08:03,342 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2022-04-06 06:08:03,342 INFO  L138     BoogieDeclarations]: Found implementation of procedure reach_error
[2022-04-06 06:08:03,342 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2022-04-06 06:08:03,343 INFO  L138     BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2022-04-06 06:08:03,343 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2022-04-06 06:08:03,343 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2022-04-06 06:08:03,343 INFO  L130     BoogieDeclarations]: Found specification of procedure __assert_fail
[2022-04-06 06:08:03,343 INFO  L130     BoogieDeclarations]: Found specification of procedure reach_error
[2022-04-06 06:08:03,343 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2022-04-06 06:08:03,343 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2022-04-06 06:08:03,343 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2022-04-06 06:08:03,343 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2022-04-06 06:08:03,344 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2022-04-06 06:08:03,344 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2022-04-06 06:08:03,345 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2022-04-06 06:08:03,345 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2022-04-06 06:08:03,345 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2022-04-06 06:08:03,345 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2022-04-06 06:08:03,345 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2022-04-06 06:08:03,391 INFO  L234             CfgBuilder]: Building ICFG
[2022-04-06 06:08:03,392 INFO  L260             CfgBuilder]: Building CFG for each procedure with an implementation
[2022-04-06 06:08:03,535 INFO  L275             CfgBuilder]: Performing block encoding
[2022-04-06 06:08:03,539 INFO  L294             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2022-04-06 06:08:03,539 INFO  L299             CfgBuilder]: Removed 2 assume(true) statements.
[2022-04-06 06:08:03,540 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 06:08:03 BoogieIcfgContainer
[2022-04-06 06:08:03,540 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2022-04-06 06:08:03,541 INFO  L113        PluginConnector]: ------------------------IcfgTransformer----------------------------
[2022-04-06 06:08:03,541 INFO  L271        PluginConnector]: Initializing IcfgTransformer...
[2022-04-06 06:08:03,542 INFO  L275        PluginConnector]: IcfgTransformer initialized
[2022-04-06 06:08:03,543 INFO  L185        PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 06:08:03" (1/1) ...
[2022-04-06 06:08:03,549 INFO  L168   ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN
[2022-04-06 06:08:03,560 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 06:08:03 BasicIcfg
[2022-04-06 06:08:03,560 INFO  L132        PluginConnector]: ------------------------ END IcfgTransformer----------------------------
[2022-04-06 06:08:03,561 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2022-04-06 06:08:03,561 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2022-04-06 06:08:03,563 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2022-04-06 06:08:03,563 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 06:08:03" (1/4) ...
[2022-04-06 06:08:03,563 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cafc9e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 06:08:03, skipping insertion in model container
[2022-04-06 06:08:03,564 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:08:03" (2/4) ...
[2022-04-06 06:08:03,564 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cafc9e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 06:08:03, skipping insertion in model container
[2022-04-06 06:08:03,564 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 06:08:03" (3/4) ...
[2022-04-06 06:08:03,564 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cafc9e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 06:08:03, skipping insertion in model container
[2022-04-06 06:08:03,564 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 06:08:03" (4/4) ...
[2022-04-06 06:08:03,565 INFO  L111   eAbstractionObserver]: Analyzing ICFG cohendiv-ll_valuebound2.cJordan
[2022-04-06 06:08:03,568 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION
[2022-04-06 06:08:03,568 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2022-04-06 06:08:03,593 INFO  L339      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2022-04-06 06:08:03,598 INFO  L340      AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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
[2022-04-06 06:08:03,598 INFO  L341      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2022-04-06 06:08:03,606 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12)
[2022-04-06 06:08:03,611 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 29
[2022-04-06 06:08:03,611 INFO  L491         BasicCegarLoop]: Found error trace
[2022-04-06 06:08:03,611 INFO  L499         BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-04-06 06:08:03,612 INFO  L403      AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-04-06 06:08:03,615 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-04-06 06:08:03,615 INFO  L85        PathProgramCache]: Analyzing trace with hash 795680375, now seen corresponding path program 1 times
[2022-04-06 06:08:03,621 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-04-06 06:08:03,621 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623456215]
[2022-04-06 06:08:03,621 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-04-06 06:08:03,622 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-04-06 06:08:03,717 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-04-06 06:08:03,782 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-04-06 06:08:03,791 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-04-06 06:08:03,806 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-04-06 06:08:03,807 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-04-06 06:08:03,814 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12
[2022-04-06 06:08:03,815 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-04-06 06:08:03,820 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17
[2022-04-06 06:08:03,824 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-04-06 06:08:03,829 INFO  L134       CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked.
[2022-04-06 06:08:03,830 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-04-06 06:08:03,830 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623456215]
[2022-04-06 06:08:03,831 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623456215] provided 1 perfect and 0 imperfect interpolant sequences
[2022-04-06 06:08:03,831 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-04-06 06:08:03,831 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2022-04-06 06:08:03,832 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619064464]
[2022-04-06 06:08:03,832 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-04-06 06:08:03,836 INFO  L554      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-04-06 06:08:03,836 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-04-06 06:08:03,861 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-04-06 06:08:03,862 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-04-06 06:08:03,864 INFO  L87              Difference]: Start difference. First operand  has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand  has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4)
[2022-04-06 06:08:03,935 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-04-06 06:08:03,935 INFO  L93              Difference]: Finished difference Result 39 states and 48 transitions.
[2022-04-06 06:08:03,936 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-04-06 06:08:03,937 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28
[2022-04-06 06:08:03,937 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-04-06 06:08:03,944 INFO  L225             Difference]: With dead ends: 39
[2022-04-06 06:08:03,944 INFO  L226             Difference]: Without dead ends: 34
[2022-04-06 06:08:03,945 INFO  L912         BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-04-06 06:08:03,949 INFO  L913         BasicCegarLoop]: 38 mSDtfsCounter, 21 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-04-06 06:08:03,950 INFO  L914         BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 41 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-04-06 06:08:03,961 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 34 states.
[2022-04-06 06:08:03,974 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34.
[2022-04-06 06:08:03,975 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 34 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10)
[2022-04-06 06:08:03,977 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions.
[2022-04-06 06:08:03,978 INFO  L78                 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 28
[2022-04-06 06:08:03,979 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-04-06 06:08:03,979 INFO  L478      AbstractCegarLoop]: Abstraction has 34 states and 43 transitions.
[2022-04-06 06:08:03,980 INFO  L479      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4)
[2022-04-06 06:08:03,980 INFO  L276                IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions.
[2022-04-06 06:08:03,981 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 29
[2022-04-06 06:08:03,981 INFO  L491         BasicCegarLoop]: Found error trace
[2022-04-06 06:08:03,981 INFO  L499         BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-04-06 06:08:03,982 WARN  L460      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2022-04-06 06:08:03,982 INFO  L403      AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-04-06 06:08:03,983 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-04-06 06:08:03,983 INFO  L85        PathProgramCache]: Analyzing trace with hash 797557208, now seen corresponding path program 1 times
[2022-04-06 06:08:03,983 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-04-06 06:08:03,983 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993969477]
[2022-04-06 06:08:03,984 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-04-06 06:08:03,984 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-04-06 06:08:04,013 ERROR L245   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-04-06 06:08:04,013 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2147298769]
[2022-04-06 06:08:04,013 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-04-06 06:08:04,013 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-04-06 06:08:04,014 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-04-06 06:08:04,015 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)
[2022-04-06 06:08:04,016 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2022-04-06 06:08:04,057 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-04-06 06:08:04,058 INFO  L263         TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 17 conjunts are in the unsatisfiable core
[2022-04-06 06:08:04,062 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-04-06 06:08:04,269 INFO  L134       CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2022-04-06 06:08:04,269 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2022-04-06 06:08:04,269 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-04-06 06:08:04,269 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993969477]
[2022-04-06 06:08:04,270 WARN  L310   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-04-06 06:08:04,270 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147298769]
[2022-04-06 06:08:04,270 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147298769] provided 1 perfect and 0 imperfect interpolant sequences
[2022-04-06 06:08:04,270 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-04-06 06:08:04,270 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9
[2022-04-06 06:08:04,271 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273305827]
[2022-04-06 06:08:04,271 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-04-06 06:08:04,271 INFO  L554      AbstractCegarLoop]: INTERPOLANT automaton has 9 states
[2022-04-06 06:08:04,271 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-04-06 06:08:04,272 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2022-04-06 06:08:04,272 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72
[2022-04-06 06:08:04,272 INFO  L87              Difference]: Start difference. First operand 34 states and 43 transitions. Second operand  has 9 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4)
[2022-04-06 06:08:04,384 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-04-06 06:08:04,385 INFO  L93              Difference]: Finished difference Result 43 states and 54 transitions.
[2022-04-06 06:08:04,385 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2022-04-06 06:08:04,385 INFO  L78                 Accepts]: Start accepts. Automaton has  has 9 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28
[2022-04-06 06:08:04,385 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-04-06 06:08:04,386 INFO  L225             Difference]: With dead ends: 43
[2022-04-06 06:08:04,386 INFO  L226             Difference]: Without dead ends: 43
[2022-04-06 06:08:04,386 INFO  L912         BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2022-04-06 06:08:04,387 INFO  L913         BasicCegarLoop]: 36 mSDtfsCounter, 28 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-04-06 06:08:04,387 INFO  L914         BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 169 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-04-06 06:08:04,388 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 43 states.
[2022-04-06 06:08:04,392 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40.
[2022-04-06 06:08:04,392 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 40 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 24 states have internal predecessors, (25), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11)
[2022-04-06 06:08:04,395 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions.
[2022-04-06 06:08:04,395 INFO  L78                 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 28
[2022-04-06 06:08:04,395 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-04-06 06:08:04,395 INFO  L478      AbstractCegarLoop]: Abstraction has 40 states and 49 transitions.
[2022-04-06 06:08:04,395 INFO  L479      AbstractCegarLoop]: INTERPOLANT automaton has  has 9 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4)
[2022-04-06 06:08:04,395 INFO  L276                IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions.
[2022-04-06 06:08:04,396 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 34
[2022-04-06 06:08:04,396 INFO  L491         BasicCegarLoop]: Found error trace
[2022-04-06 06:08:04,396 INFO  L499         BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-04-06 06:08:04,415 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2022-04-06 06:08:04,597 WARN  L460      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-04-06 06:08:04,597 INFO  L403      AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-04-06 06:08:04,598 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-04-06 06:08:04,598 INFO  L85        PathProgramCache]: Analyzing trace with hash 648866686, now seen corresponding path program 1 times
[2022-04-06 06:08:04,598 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-04-06 06:08:04,598 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501476326]
[2022-04-06 06:08:04,598 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-04-06 06:08:04,598 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-04-06 06:08:04,607 ERROR L245   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-04-06 06:08:04,608 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1338360300]
[2022-04-06 06:08:04,608 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-04-06 06:08:04,608 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-04-06 06:08:04,608 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-04-06 06:08:04,611 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)
[2022-04-06 06:08:04,613 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2022-04-06 06:08:04,646 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-04-06 06:08:04,647 INFO  L263         TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core
[2022-04-06 06:08:04,649 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-04-06 06:08:04,784 INFO  L134       CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2022-04-06 06:08:04,785 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2022-04-06 06:08:04,785 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-04-06 06:08:04,785 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501476326]
[2022-04-06 06:08:04,785 WARN  L310   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-04-06 06:08:04,785 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338360300]
[2022-04-06 06:08:04,785 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338360300] provided 1 perfect and 0 imperfect interpolant sequences
[2022-04-06 06:08:04,785 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-04-06 06:08:04,786 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9
[2022-04-06 06:08:04,786 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269538962]
[2022-04-06 06:08:04,786 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-04-06 06:08:04,786 INFO  L554      AbstractCegarLoop]: INTERPOLANT automaton has 9 states
[2022-04-06 06:08:04,786 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-04-06 06:08:04,787 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2022-04-06 06:08:04,787 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72
[2022-04-06 06:08:04,787 INFO  L87              Difference]: Start difference. First operand 40 states and 49 transitions. Second operand  has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5)
[2022-04-06 06:08:04,911 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-04-06 06:08:04,912 INFO  L93              Difference]: Finished difference Result 55 states and 70 transitions.
[2022-04-06 06:08:04,912 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2022-04-06 06:08:04,912 INFO  L78                 Accepts]: Start accepts. Automaton has  has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 33
[2022-04-06 06:08:04,912 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-04-06 06:08:04,914 INFO  L225             Difference]: With dead ends: 55
[2022-04-06 06:08:04,914 INFO  L226             Difference]: Without dead ends: 54
[2022-04-06 06:08:04,914 INFO  L912         BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2022-04-06 06:08:04,916 INFO  L913         BasicCegarLoop]: 39 mSDtfsCounter, 45 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-04-06 06:08:04,916 INFO  L914         BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 166 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-04-06 06:08:04,917 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 54 states.
[2022-04-06 06:08:04,921 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53.
[2022-04-06 06:08:04,921 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 53 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 18 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16)
[2022-04-06 06:08:04,922 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 67 transitions.
[2022-04-06 06:08:04,923 INFO  L78                 Accepts]: Start accepts. Automaton has 53 states and 67 transitions. Word has length 33
[2022-04-06 06:08:04,923 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-04-06 06:08:04,923 INFO  L478      AbstractCegarLoop]: Abstraction has 53 states and 67 transitions.
[2022-04-06 06:08:04,923 INFO  L479      AbstractCegarLoop]: INTERPOLANT automaton has  has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5)
[2022-04-06 06:08:04,923 INFO  L276                IsEmpty]: Start isEmpty. Operand 53 states and 67 transitions.
[2022-04-06 06:08:04,924 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 41
[2022-04-06 06:08:04,924 INFO  L491         BasicCegarLoop]: Found error trace
[2022-04-06 06:08:04,925 INFO  L499         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-04-06 06:08:04,940 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0
[2022-04-06 06:08:05,131 WARN  L460      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2
[2022-04-06 06:08:05,132 INFO  L403      AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-04-06 06:08:05,132 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-04-06 06:08:05,132 INFO  L85        PathProgramCache]: Analyzing trace with hash 619469170, now seen corresponding path program 1 times
[2022-04-06 06:08:05,132 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-04-06 06:08:05,133 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378619255]
[2022-04-06 06:08:05,133 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-04-06 06:08:05,133 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-04-06 06:08:05,140 ERROR L245   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-04-06 06:08:05,141 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [629492962]
[2022-04-06 06:08:05,141 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-04-06 06:08:05,141 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-04-06 06:08:05,141 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-04-06 06:08:05,142 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)
[2022-04-06 06:08:05,147 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2022-04-06 06:08:05,231 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-04-06 06:08:05,232 INFO  L263         TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core
[2022-04-06 06:08:05,234 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-04-06 06:08:05,389 INFO  L134       CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked.
[2022-04-06 06:08:05,389 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-04-06 06:08:05,511 INFO  L134       CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked.
[2022-04-06 06:08:05,512 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-04-06 06:08:05,512 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378619255]
[2022-04-06 06:08:05,512 WARN  L310   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-04-06 06:08:05,512 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629492962]
[2022-04-06 06:08:05,512 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [629492962] provided 1 perfect and 1 imperfect interpolant sequences
[2022-04-06 06:08:05,512 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2022-04-06 06:08:05,512 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 11
[2022-04-06 06:08:05,513 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734897886]
[2022-04-06 06:08:05,513 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-04-06 06:08:05,513 INFO  L554      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2022-04-06 06:08:05,513 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-04-06 06:08:05,513 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2022-04-06 06:08:05,514 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110
[2022-04-06 06:08:05,514 INFO  L87              Difference]: Start difference. First operand 53 states and 67 transitions. Second operand  has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6)
[2022-04-06 06:08:05,558 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-04-06 06:08:05,558 INFO  L93              Difference]: Finished difference Result 57 states and 70 transitions.
[2022-04-06 06:08:05,560 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2022-04-06 06:08:05,560 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 40
[2022-04-06 06:08:05,560 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-04-06 06:08:05,561 INFO  L225             Difference]: With dead ends: 57
[2022-04-06 06:08:05,561 INFO  L226             Difference]: Without dead ends: 57
[2022-04-06 06:08:05,561 INFO  L912         BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132
[2022-04-06 06:08:05,562 INFO  L913         BasicCegarLoop]: 33 mSDtfsCounter, 10 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-04-06 06:08:05,562 INFO  L914         BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 102 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-04-06 06:08:05,562 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 57 states.
[2022-04-06 06:08:05,566 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57.
[2022-04-06 06:08:05,566 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 57 states, 32 states have (on average 1.125) internal successors, (36), 33 states have internal predecessors, (36), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16)
[2022-04-06 06:08:05,567 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 70 transitions.
[2022-04-06 06:08:05,567 INFO  L78                 Accepts]: Start accepts. Automaton has 57 states and 70 transitions. Word has length 40
[2022-04-06 06:08:05,567 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-04-06 06:08:05,568 INFO  L478      AbstractCegarLoop]: Abstraction has 57 states and 70 transitions.
[2022-04-06 06:08:05,568 INFO  L479      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6)
[2022-04-06 06:08:05,568 INFO  L276                IsEmpty]: Start isEmpty. Operand 57 states and 70 transitions.
[2022-04-06 06:08:05,568 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 51
[2022-04-06 06:08:05,568 INFO  L491         BasicCegarLoop]: Found error trace
[2022-04-06 06:08:05,569 INFO  L499         BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-04-06 06:08:05,587 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0
[2022-04-06 06:08:05,783 WARN  L460      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-04-06 06:08:05,784 INFO  L403      AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-04-06 06:08:05,784 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-04-06 06:08:05,784 INFO  L85        PathProgramCache]: Analyzing trace with hash -574143214, now seen corresponding path program 1 times
[2022-04-06 06:08:05,784 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-04-06 06:08:05,784 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110276649]
[2022-04-06 06:08:05,784 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-04-06 06:08:05,784 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-04-06 06:08:05,796 ERROR L245   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-04-06 06:08:05,796 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1255895559]
[2022-04-06 06:08:05,796 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-04-06 06:08:05,796 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-04-06 06:08:05,797 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-04-06 06:08:05,799 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)
[2022-04-06 06:08:05,800 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2022-04-06 06:08:05,834 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-04-06 06:08:05,835 INFO  L263         TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 9 conjunts are in the unsatisfiable core
[2022-04-06 06:08:05,836 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-04-06 06:08:05,951 INFO  L134       CoverageAnalysis]: Checked inductivity of 44 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked.
[2022-04-06 06:08:05,952 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2022-04-06 06:08:05,952 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-04-06 06:08:05,953 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110276649]
[2022-04-06 06:08:05,953 WARN  L310   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-04-06 06:08:05,953 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255895559]
[2022-04-06 06:08:05,953 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255895559] provided 1 perfect and 0 imperfect interpolant sequences
[2022-04-06 06:08:05,953 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-04-06 06:08:05,953 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2022-04-06 06:08:05,953 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390416746]
[2022-04-06 06:08:05,953 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-04-06 06:08:05,954 INFO  L554      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2022-04-06 06:08:05,955 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-04-06 06:08:05,955 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2022-04-06 06:08:05,956 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56
[2022-04-06 06:08:05,956 INFO  L87              Difference]: Start difference. First operand 57 states and 70 transitions. Second operand  has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8)
[2022-04-06 06:08:06,040 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-04-06 06:08:06,041 INFO  L93              Difference]: Finished difference Result 61 states and 73 transitions.
[2022-04-06 06:08:06,041 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2022-04-06 06:08:06,041 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 50
[2022-04-06 06:08:06,041 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-04-06 06:08:06,042 INFO  L225             Difference]: With dead ends: 61
[2022-04-06 06:08:06,042 INFO  L226             Difference]: Without dead ends: 61
[2022-04-06 06:08:06,042 INFO  L912         BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110
[2022-04-06 06:08:06,043 INFO  L913         BasicCegarLoop]: 34 mSDtfsCounter, 16 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-04-06 06:08:06,043 INFO  L914         BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 160 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-04-06 06:08:06,043 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 61 states.
[2022-04-06 06:08:06,047 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61.
[2022-04-06 06:08:06,047 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 61 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 36 states have internal predecessors, (39), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16)
[2022-04-06 06:08:06,048 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions.
[2022-04-06 06:08:06,048 INFO  L78                 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 50
[2022-04-06 06:08:06,048 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-04-06 06:08:06,048 INFO  L478      AbstractCegarLoop]: Abstraction has 61 states and 73 transitions.
[2022-04-06 06:08:06,048 INFO  L479      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8)
[2022-04-06 06:08:06,048 INFO  L276                IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions.
[2022-04-06 06:08:06,049 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 57
[2022-04-06 06:08:06,049 INFO  L491         BasicCegarLoop]: Found error trace
[2022-04-06 06:08:06,049 INFO  L499         BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-04-06 06:08:06,066 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0
[2022-04-06 06:08:06,266 WARN  L460      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-04-06 06:08:06,266 INFO  L403      AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-04-06 06:08:06,266 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-04-06 06:08:06,266 INFO  L85        PathProgramCache]: Analyzing trace with hash -810208713, now seen corresponding path program 1 times
[2022-04-06 06:08:06,267 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-04-06 06:08:06,267 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942873807]
[2022-04-06 06:08:06,267 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-04-06 06:08:06,267 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-04-06 06:08:06,277 ERROR L245   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-04-06 06:08:06,278 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1122833399]
[2022-04-06 06:08:06,278 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-04-06 06:08:06,278 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-04-06 06:08:06,278 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-04-06 06:08:06,279 INFO  L229       MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-04-06 06:08:06,280 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process
[2022-04-06 06:08:06,317 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-04-06 06:08:06,318 INFO  L263         TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 9 conjunts are in the unsatisfiable core
[2022-04-06 06:08:06,320 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-04-06 06:08:06,416 INFO  L134       CoverageAnalysis]: Checked inductivity of 62 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked.
[2022-04-06 06:08:06,416 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-04-06 06:08:06,569 INFO  L134       CoverageAnalysis]: Checked inductivity of 62 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked.
[2022-04-06 06:08:06,569 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-04-06 06:08:06,569 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942873807]
[2022-04-06 06:08:06,569 WARN  L310   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-04-06 06:08:06,570 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122833399]
[2022-04-06 06:08:06,570 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122833399] provided 0 perfect and 2 imperfect interpolant sequences
[2022-04-06 06:08:06,570 INFO  L184   FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2022-04-06 06:08:06,570 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10
[2022-04-06 06:08:06,570 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599727779]
[2022-04-06 06:08:06,570 INFO  L85    oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2022-04-06 06:08:06,570 INFO  L554      AbstractCegarLoop]: INTERPOLANT automaton has 10 states
[2022-04-06 06:08:06,571 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-04-06 06:08:06,571 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2022-04-06 06:08:06,571 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90
[2022-04-06 06:08:06,571 INFO  L87              Difference]: Start difference. First operand 61 states and 73 transitions. Second operand  has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12)
[2022-04-06 06:08:06,680 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-04-06 06:08:06,681 INFO  L93              Difference]: Finished difference Result 65 states and 76 transitions.
[2022-04-06 06:08:06,681 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2022-04-06 06:08:06,681 INFO  L78                 Accepts]: Start accepts. Automaton has  has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 56
[2022-04-06 06:08:06,681 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-04-06 06:08:06,682 INFO  L225             Difference]: With dead ends: 65
[2022-04-06 06:08:06,682 INFO  L226             Difference]: Without dead ends: 65
[2022-04-06 06:08:06,682 INFO  L912         BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156
[2022-04-06 06:08:06,683 INFO  L913         BasicCegarLoop]: 28 mSDtfsCounter, 24 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-04-06 06:08:06,683 INFO  L914         BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 140 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-04-06 06:08:06,683 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 65 states.
[2022-04-06 06:08:06,686 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65.
[2022-04-06 06:08:06,687 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 65 states, 38 states have (on average 1.105263157894737) internal successors, (42), 39 states have internal predecessors, (42), 18 states have call successors, (18), 9 states have call predecessors, (18), 8 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16)
[2022-04-06 06:08:06,687 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 76 transitions.
[2022-04-06 06:08:06,687 INFO  L78                 Accepts]: Start accepts. Automaton has 65 states and 76 transitions. Word has length 56
[2022-04-06 06:08:06,688 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-04-06 06:08:06,688 INFO  L478      AbstractCegarLoop]: Abstraction has 65 states and 76 transitions.
[2022-04-06 06:08:06,688 INFO  L479      AbstractCegarLoop]: INTERPOLANT automaton has  has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12)
[2022-04-06 06:08:06,688 INFO  L276                IsEmpty]: Start isEmpty. Operand 65 states and 76 transitions.
[2022-04-06 06:08:06,689 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 64
[2022-04-06 06:08:06,689 INFO  L491         BasicCegarLoop]: Found error trace
[2022-04-06 06:08:06,689 INFO  L499         BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-04-06 06:08:06,707 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0
[2022-04-06 06:08:06,903 WARN  L460      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-04-06 06:08:06,904 INFO  L403      AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-04-06 06:08:06,904 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-04-06 06:08:06,904 INFO  L85        PathProgramCache]: Analyzing trace with hash -1603019557, now seen corresponding path program 1 times
[2022-04-06 06:08:06,904 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-04-06 06:08:06,904 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925904512]
[2022-04-06 06:08:06,904 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-04-06 06:08:06,905 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-04-06 06:08:06,912 ERROR L245   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-04-06 06:08:06,912 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1658460924]
[2022-04-06 06:08:06,912 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-04-06 06:08:06,912 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-04-06 06:08:06,912 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-04-06 06:08:06,913 INFO  L229       MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-04-06 06:08:06,916 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process
[2022-04-06 06:08:06,953 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-04-06 06:08:06,954 INFO  L263         TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 19 conjunts are in the unsatisfiable core
[2022-04-06 06:08:06,956 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-04-06 06:08:07,146 INFO  L134       CoverageAnalysis]: Checked inductivity of 87 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked.
[2022-04-06 06:08:07,147 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-04-06 06:08:07,296 INFO  L134       CoverageAnalysis]: Checked inductivity of 87 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked.
[2022-04-06 06:08:07,296 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-04-06 06:08:07,296 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925904512]
[2022-04-06 06:08:07,296 WARN  L310   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-04-06 06:08:07,296 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658460924]
[2022-04-06 06:08:07,296 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658460924] provided 1 perfect and 1 imperfect interpolant sequences
[2022-04-06 06:08:07,297 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2022-04-06 06:08:07,297 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 12
[2022-04-06 06:08:07,297 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689842241]
[2022-04-06 06:08:07,297 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-04-06 06:08:07,297 INFO  L554      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2022-04-06 06:08:07,297 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-04-06 06:08:07,298 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2022-04-06 06:08:07,298 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132
[2022-04-06 06:08:07,298 INFO  L87              Difference]: Start difference. First operand 65 states and 76 transitions. Second operand  has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10)
[2022-04-06 06:08:07,522 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-04-06 06:08:07,522 INFO  L93              Difference]: Finished difference Result 63 states and 74 transitions.
[2022-04-06 06:08:07,523 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2022-04-06 06:08:07,523 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 63
[2022-04-06 06:08:07,523 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-04-06 06:08:07,523 INFO  L225             Difference]: With dead ends: 63
[2022-04-06 06:08:07,523 INFO  L226             Difference]: Without dead ends: 0
[2022-04-06 06:08:07,524 INFO  L912         BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182
[2022-04-06 06:08:07,524 INFO  L913         BasicCegarLoop]: 29 mSDtfsCounter, 17 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2022-04-06 06:08:07,524 INFO  L914         BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 110 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2022-04-06 06:08:07,525 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 0 states.
[2022-04-06 06:08:07,525 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0.
[2022-04-06 06:08:07,525 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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)
[2022-04-06 06:08:07,525 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions.
[2022-04-06 06:08:07,525 INFO  L78                 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 63
[2022-04-06 06:08:07,525 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-04-06 06:08:07,525 INFO  L478      AbstractCegarLoop]: Abstraction has 0 states and 0 transitions.
[2022-04-06 06:08:07,525 INFO  L479      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10)
[2022-04-06 06:08:07,525 INFO  L276                IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions.
[2022-04-06 06:08:07,525 INFO  L282                IsEmpty]: Finished isEmpty. No accepting run.
[2022-04-06 06:08:07,527 INFO  L788   garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining)
[2022-04-06 06:08:07,543 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0
[2022-04-06 06:08:07,728 WARN  L460      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-04-06 06:08:07,730 INFO  L719         BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1]
[2022-04-06 06:08:07,731 INFO  L178   ceAbstractionStarter]: Computing trace abstraction results
[2022-04-06 06:08:07,733 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 06:08:07 BasicIcfg
[2022-04-06 06:08:07,733 INFO  L132        PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2022-04-06 06:08:07,733 INFO  L158              Benchmark]: Toolchain (without parser) took 4712.26ms. Allocated memory was 180.4MB in the beginning and 220.2MB in the end (delta: 39.8MB). Free memory was 128.6MB in the beginning and 132.3MB in the end (delta: -3.7MB). Peak memory consumption was 37.2MB. Max. memory is 8.0GB.
[2022-04-06 06:08:07,733 INFO  L158              Benchmark]: CDTParser took 0.09ms. Allocated memory is still 180.4MB. Free memory is still 144.8MB. There was no memory consumed. Max. memory is 8.0GB.
[2022-04-06 06:08:07,734 INFO  L158              Benchmark]: CACSL2BoogieTranslator took 223.05ms. Allocated memory is still 180.4MB. Free memory was 128.5MB in the beginning and 156.0MB in the end (delta: -27.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB.
[2022-04-06 06:08:07,734 INFO  L158              Benchmark]: Boogie Preprocessor took 36.28ms. Allocated memory is still 180.4MB. Free memory was 156.0MB in the beginning and 154.5MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB.
[2022-04-06 06:08:07,734 INFO  L158              Benchmark]: RCFGBuilder took 255.80ms. Allocated memory is still 180.4MB. Free memory was 154.5MB in the beginning and 144.0MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB.
[2022-04-06 06:08:07,734 INFO  L158              Benchmark]: IcfgTransformer took 19.28ms. Allocated memory is still 180.4MB. Free memory was 144.0MB in the beginning and 142.5MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB.
[2022-04-06 06:08:07,734 INFO  L158              Benchmark]: TraceAbstraction took 4171.79ms. Allocated memory was 180.4MB in the beginning and 220.2MB in the end (delta: 39.8MB). Free memory was 141.9MB in the beginning and 132.3MB in the end (delta: 9.6MB). Peak memory consumption was 49.9MB. Max. memory is 8.0GB.
[2022-04-06 06:08:07,735 INFO  L339   ainManager$Toolchain]: #######################  End [Toolchain 1] #######################
 --- Results ---
 * Results from de.uni_freiburg.informatik.ultimate.core:
  - StatisticsResult: Toolchain Benchmarks
    Benchmark results are:
 * CDTParser took 0.09ms. Allocated memory is still 180.4MB. Free memory is still 144.8MB. There was no memory consumed. Max. memory is 8.0GB.
 * CACSL2BoogieTranslator took 223.05ms. Allocated memory is still 180.4MB. Free memory was 128.5MB in the beginning and 156.0MB in the end (delta: -27.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB.
 * Boogie Preprocessor took 36.28ms. Allocated memory is still 180.4MB. Free memory was 156.0MB in the beginning and 154.5MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB.
 * RCFGBuilder took 255.80ms. Allocated memory is still 180.4MB. Free memory was 154.5MB in the beginning and 144.0MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB.
 * IcfgTransformer took 19.28ms. Allocated memory is still 180.4MB. Free memory was 144.0MB in the beginning and 142.5MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB.
 * TraceAbstraction took 4171.79ms. Allocated memory was 180.4MB in the beginning and 220.2MB in the end (delta: 39.8MB). Free memory was 141.9MB in the beginning and 132.3MB in the end (delta: 9.6MB). Peak memory consumption was 49.9MB. Max. memory is 8.0GB.
 * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
  - StatisticsResult: ErrorAutomatonStatistics
    NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0
  - PositiveResult [Line: 17]: call to reach_error is unreachable
    For all program executions holds that call to reach_error is unreachable at this location
  - StatisticsResult: Ultimate Automizer benchmark data
    CFG has 5 procedures, 39 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 4.1s, OverallIterations: 7, TraceHistogramMax: 7, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 200 SdHoareTripleChecker+Valid, 0.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 161 mSDsluCounter, 888 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 651 mSDsCounter, 96 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 652 IncrementalHoareTripleChecker+Invalid, 748 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 96 mSolverCounterUnsat, 237 mSDtfsCounter, 652 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 446 GetRequests, 382 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=65occurred in iteration=6, InterpolantAutomatonStates: 47, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 298 NumberOfCodeBlocks, 298 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 447 ConstructedInterpolants, 0 QuantifiedInterpolants, 1174 SizeOfPredicates, 24 NumberOfNonLiveVariables, 745 ConjunctsInSsa, 90 ConjunctsInUnsatCore, 10 InterpolantComputations, 6 PerfectInterpolantSequences, 400/420 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available
  - AllSpecificationsHoldResult: All specifications hold
    1 specifications checked. All of them hold
RESULT: Ultimate proved your program to be correct!
[2022-04-06 06:08:07,762 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0
Received shutdown request...