/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/bresenham-ll_valuebound100.c


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


This is Ultimate 0.2.1-dev-6253b08
[2021-05-06 07:09:50,836 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2021-05-06 07:09:50,838 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2021-05-06 07:09:50,860 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2021-05-06 07:09:50,861 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2021-05-06 07:09:50,862 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2021-05-06 07:09:50,863 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2021-05-06 07:09:50,865 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2021-05-06 07:09:50,866 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2021-05-06 07:09:50,867 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2021-05-06 07:09:50,867 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2021-05-06 07:09:50,868 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2021-05-06 07:09:50,869 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2021-05-06 07:09:50,869 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2021-05-06 07:09:50,870 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2021-05-06 07:09:50,871 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2021-05-06 07:09:50,872 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2021-05-06 07:09:50,873 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2021-05-06 07:09:50,874 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2021-05-06 07:09:50,887 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2021-05-06 07:09:50,890 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2021-05-06 07:09:50,892 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2021-05-06 07:09:50,898 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2021-05-06 07:09:50,900 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2021-05-06 07:09:50,908 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2021-05-06 07:09:50,908 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2021-05-06 07:09:50,908 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2021-05-06 07:09:50,909 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2021-05-06 07:09:50,909 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2021-05-06 07:09:50,910 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2021-05-06 07:09:50,910 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2021-05-06 07:09:50,911 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2021-05-06 07:09:50,912 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2021-05-06 07:09:50,912 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2021-05-06 07:09:50,913 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2021-05-06 07:09:50,913 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2021-05-06 07:09:50,914 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2021-05-06 07:09:50,914 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2021-05-06 07:09:50,914 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2021-05-06 07:09:50,915 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2021-05-06 07:09:50,916 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2021-05-06 07:09:50,919 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf
[2021-05-06 07:09:50,928 INFO  L113        SettingsManager]: Loading preferences was successful
[2021-05-06 07:09:50,928 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2021-05-06 07:09:50,929 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2021-05-06 07:09:50,929 INFO  L138        SettingsManager]:  * sizeof long=4
[2021-05-06 07:09:50,929 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2021-05-06 07:09:50,929 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2021-05-06 07:09:50,929 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2021-05-06 07:09:50,930 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2021-05-06 07:09:50,930 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2021-05-06 07:09:50,930 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2021-05-06 07:09:50,930 INFO  L138        SettingsManager]:  * sizeof long double=12
[2021-05-06 07:09:50,930 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2021-05-06 07:09:50,930 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2021-05-06 07:09:50,930 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2021-05-06 07:09:50,931 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2021-05-06 07:09:50,931 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2021-05-06 07:09:50,931 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2021-05-06 07:09:50,931 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2021-05-06 07:09:50,931 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2021-05-06 07:09:50,931 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2021-05-06 07:09:50,931 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2021-05-06 07:09:50,932 INFO  L136        SettingsManager]: Preferences of IcfgTransformer differ from their defaults:
[2021-05-06 07:09:50,932 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN;
[2021-05-06 07:09:51,147 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2021-05-06 07:09:51,173 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2021-05-06 07:09:51,174 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2021-05-06 07:09:51,175 INFO  L271        PluginConnector]: Initializing CDTParser...
[2021-05-06 07:09:51,175 INFO  L275        PluginConnector]: CDTParser initialized
[2021-05-06 07:09:51,176 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_valuebound100.c
[2021-05-06 07:09:51,224 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/142258059/6883c73a97604e879cbf1e9708d4b0b0/FLAG4b70e55e1
[2021-05-06 07:09:51,567 INFO  L306              CDTParser]: Found 1 translation units.
[2021-05-06 07:09:51,568 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_valuebound100.c
[2021-05-06 07:09:51,572 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/142258059/6883c73a97604e879cbf1e9708d4b0b0/FLAG4b70e55e1
[2021-05-06 07:09:51,978 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/142258059/6883c73a97604e879cbf1e9708d4b0b0
[2021-05-06 07:09:51,980 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2021-05-06 07:09:51,981 INFO  L131        ToolchainWalker]: Walking toolchain with 5 elements.
[2021-05-06 07:09:51,989 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2021-05-06 07:09:51,989 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2021-05-06 07:09:51,991 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2021-05-06 07:09:51,992 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 07:09:51" (1/1) ...
[2021-05-06 07:09:51,993 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6607eb42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:09:51, skipping insertion in model container
[2021-05-06 07:09:51,993 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 07:09:51" (1/1) ...
[2021-05-06 07:09:52,000 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2021-05-06 07:09:52,010 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2021-05-06 07:09:52,110 WARN  L224   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/bresenham-ll_valuebound100.c[597,610]
[2021-05-06 07:09:52,142 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2021-05-06 07:09:52,147 INFO  L203         MainTranslator]: Completed pre-run
[2021-05-06 07:09:52,156 WARN  L224   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/bresenham-ll_valuebound100.c[597,610]
[2021-05-06 07:09:52,174 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2021-05-06 07:09:52,220 INFO  L208         MainTranslator]: Completed translation
[2021-05-06 07:09:52,221 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:09:52 WrapperNode
[2021-05-06 07:09:52,221 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2021-05-06 07:09:52,221 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2021-05-06 07:09:52,221 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2021-05-06 07:09:52,222 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2021-05-06 07:09:52,235 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:09:52" (1/1) ...
[2021-05-06 07:09:52,236 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:09:52" (1/1) ...
[2021-05-06 07:09:52,245 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:09:52" (1/1) ...
[2021-05-06 07:09:52,245 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:09:52" (1/1) ...
[2021-05-06 07:09:52,254 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:09:52" (1/1) ...
[2021-05-06 07:09:52,257 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:09:52" (1/1) ...
[2021-05-06 07:09:52,261 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:09:52" (1/1) ...
[2021-05-06 07:09:52,264 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2021-05-06 07:09:52,265 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2021-05-06 07:09:52,265 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2021-05-06 07:09:52,266 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2021-05-06 07:09:52,266 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:09:52" (1/1) ...
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2021-05-06 07:09:52,319 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2021-05-06 07:09:52,320 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2021-05-06 07:09:52,320 INFO  L138     BoogieDeclarations]: Found implementation of procedure reach_error
[2021-05-06 07:09:52,320 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2021-05-06 07:09:52,320 INFO  L138     BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2021-05-06 07:09:52,320 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2021-05-06 07:09:52,320 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2021-05-06 07:09:52,320 INFO  L130     BoogieDeclarations]: Found specification of procedure __assert_fail
[2021-05-06 07:09:52,321 INFO  L130     BoogieDeclarations]: Found specification of procedure reach_error
[2021-05-06 07:09:52,321 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2021-05-06 07:09:52,321 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2021-05-06 07:09:52,321 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2021-05-06 07:09:52,321 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2021-05-06 07:09:52,321 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2021-05-06 07:09:52,321 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2021-05-06 07:09:52,322 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2021-05-06 07:09:52,322 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2021-05-06 07:09:52,322 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2021-05-06 07:09:52,322 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2021-05-06 07:09:52,322 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2021-05-06 07:09:52,525 INFO  L294             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2021-05-06 07:09:52,525 INFO  L299             CfgBuilder]: Removed 1 assume(true) statements.
[2021-05-06 07:09:52,526 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:09:52 BoogieIcfgContainer
[2021-05-06 07:09:52,526 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2021-05-06 07:09:52,527 INFO  L113        PluginConnector]: ------------------------IcfgTransformer----------------------------
[2021-05-06 07:09:52,527 INFO  L271        PluginConnector]: Initializing IcfgTransformer...
[2021-05-06 07:09:52,527 INFO  L275        PluginConnector]: IcfgTransformer initialized
[2021-05-06 07:09:52,529 INFO  L185        PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:09:52" (1/1) ...
[2021-05-06 07:09:52,538 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 07:09:52 BasicIcfg
[2021-05-06 07:09:52,538 INFO  L132        PluginConnector]: ------------------------ END IcfgTransformer----------------------------
[2021-05-06 07:09:52,539 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2021-05-06 07:09:52,539 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2021-05-06 07:09:52,541 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2021-05-06 07:09:52,541 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 07:09:51" (1/4) ...
[2021-05-06 07:09:52,542 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d3a107f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 07:09:52, skipping insertion in model container
[2021-05-06 07:09:52,542 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:09:52" (2/4) ...
[2021-05-06 07:09:52,542 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d3a107f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 07:09:52, skipping insertion in model container
[2021-05-06 07:09:52,542 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:09:52" (3/4) ...
[2021-05-06 07:09:52,542 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d3a107f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 07:09:52, skipping insertion in model container
[2021-05-06 07:09:52,542 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 07:09:52" (4/4) ...
[2021-05-06 07:09:52,543 INFO  L111   eAbstractionObserver]: Analyzing ICFG bresenham-ll_valuebound100.cJordan
[2021-05-06 07:09:52,546 INFO  L149   ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION
[2021-05-06 07:09:52,548 INFO  L161   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2021-05-06 07:09:52,558 INFO  L253      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2021-05-06 07:09:52,569 INFO  L376      AbstractCegarLoop]: Interprodecural is true
[2021-05-06 07:09:52,569 INFO  L377      AbstractCegarLoop]: Hoare is false
[2021-05-06 07:09:52,569 INFO  L378      AbstractCegarLoop]: Compute interpolants for ForwardPredicates
[2021-05-06 07:09:52,569 INFO  L379      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2021-05-06 07:09:52,569 INFO  L380      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2021-05-06 07:09:52,569 INFO  L381      AbstractCegarLoop]: Difference is false
[2021-05-06 07:09:52,570 INFO  L382      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2021-05-06 07:09:52,570 INFO  L386      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2021-05-06 07:09:52,581 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 32 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6)
[2021-05-06 07:09:52,586 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 24
[2021-05-06 07:09:52,587 INFO  L515         BasicCegarLoop]: Found error trace
[2021-05-06 07:09:52,587 INFO  L523         BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-05-06 07:09:52,587 INFO  L428      AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2021-05-06 07:09:52,590 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-05-06 07:09:52,591 INFO  L82        PathProgramCache]: Analyzing trace with hash -1563578423, now seen corresponding path program 1 times
[2021-05-06 07:09:52,602 INFO  L162   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-05-06 07:09:52,602 INFO  L361   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318645146]
[2021-05-06 07:09:52,602 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-05-06 07:09:52,669 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-05-06 07:09:52,769 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2021-05-06 07:09:52,784 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-05-06 07:09:52,795 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2021-05-06 07:09:52,796 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-05-06 07:09:52,799 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12
[2021-05-06 07:09:52,800 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-05-06 07:09:52,802 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2021-05-06 07:09:52,802 INFO  L179   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-05-06 07:09:52,803 INFO  L361   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318645146]
[2021-05-06 07:09:52,803 INFO  L200   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318645146] provided 1 perfect and 0 imperfect interpolant sequences
[2021-05-06 07:09:52,803 INFO  L226   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2021-05-06 07:09:52,803 INFO  L239   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2021-05-06 07:09:52,804 INFO  L155   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284036587]
[2021-05-06 07:09:52,806 INFO  L460      AbstractCegarLoop]: Interpolant automaton has 3 states
[2021-05-06 07:09:52,807 INFO  L142   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-05-06 07:09:52,814 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-05-06 07:09:52,814 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-05-06 07:09:52,816 INFO  L87              Difference]: Start difference. First operand  has 32 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3)
[2021-05-06 07:09:52,868 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-05-06 07:09:52,868 INFO  L93              Difference]: Finished difference Result 32 states and 35 transitions.
[2021-05-06 07:09:52,869 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2021-05-06 07:09:52,870 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23
[2021-05-06 07:09:52,870 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-05-06 07:09:52,877 INFO  L225             Difference]: With dead ends: 32
[2021-05-06 07:09:52,877 INFO  L226             Difference]: Without dead ends: 27
[2021-05-06 07:09:52,879 INFO  L779         BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-05-06 07:09:52,890 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 27 states.
[2021-05-06 07:09:52,899 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27.
[2021-05-06 07:09:52,900 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 27 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4)
[2021-05-06 07:09:52,901 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions.
[2021-05-06 07:09:52,901 INFO  L78                 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 23
[2021-05-06 07:09:52,901 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-05-06 07:09:52,901 INFO  L480      AbstractCegarLoop]: Abstraction has 27 states and 30 transitions.
[2021-05-06 07:09:52,902 INFO  L481      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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3)
[2021-05-06 07:09:52,902 INFO  L276                IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions.
[2021-05-06 07:09:52,902 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 24
[2021-05-06 07:09:52,903 INFO  L515         BasicCegarLoop]: Found error trace
[2021-05-06 07:09:52,903 INFO  L523         BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-05-06 07:09:52,903 WARN  L517      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2021-05-06 07:09:52,903 INFO  L428      AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2021-05-06 07:09:52,904 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-05-06 07:09:52,904 INFO  L82        PathProgramCache]: Analyzing trace with hash -1863481077, now seen corresponding path program 1 times
[2021-05-06 07:09:52,904 INFO  L162   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-05-06 07:09:52,904 INFO  L361   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527696304]
[2021-05-06 07:09:52,904 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-05-06 07:09:52,920 ERROR L278   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2021-05-06 07:09:52,920 INFO  L361   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [349332642]
[2021-05-06 07:09:52,920 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-05-06 07:09:53,006 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-05-06 07:09:53,009 INFO  L263         TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core
[2021-05-06 07:09:53,013 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2021-05-06 07:09:53,126 WARN  L159       QuantifierPusher]: Ignoring assumption.
[2021-05-06 07:09:53,142 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2021-05-06 07:09:53,142 INFO  L179   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-05-06 07:09:53,142 INFO  L361   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527696304]
[2021-05-06 07:09:53,143 WARN  L340   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown
[2021-05-06 07:09:53,143 INFO  L361   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349332642]
[2021-05-06 07:09:53,143 INFO  L200   FreeRefinementEngine]: IpTcStrategyModuleZ3 [349332642] provided 1 perfect and 0 imperfect interpolant sequences
[2021-05-06 07:09:53,143 INFO  L226   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2021-05-06 07:09:53,143 INFO  L239   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2021-05-06 07:09:53,143 INFO  L155   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684161361]
[2021-05-06 07:09:53,144 INFO  L460      AbstractCegarLoop]: Interpolant automaton has 6 states
[2021-05-06 07:09:53,144 INFO  L142   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-05-06 07:09:53,144 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2021-05-06 07:09:53,145 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2021-05-06 07:09:53,145 INFO  L87              Difference]: Start difference. First operand 27 states and 30 transitions. Second operand  has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3)
[2021-05-06 07:09:53,205 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-05-06 07:09:53,205 INFO  L93              Difference]: Finished difference Result 37 states and 42 transitions.
[2021-05-06 07:09:53,205 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2021-05-06 07:09:53,206 INFO  L78                 Accepts]: Start accepts. Automaton has  has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23
[2021-05-06 07:09:53,213 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-05-06 07:09:53,214 INFO  L225             Difference]: With dead ends: 37
[2021-05-06 07:09:53,214 INFO  L226             Difference]: Without dead ends: 35
[2021-05-06 07:09:53,215 INFO  L779         BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 40.0ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56
[2021-05-06 07:09:53,215 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 35 states.
[2021-05-06 07:09:53,218 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34.
[2021-05-06 07:09:53,218 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 34 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5)
[2021-05-06 07:09:53,219 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions.
[2021-05-06 07:09:53,219 INFO  L78                 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 23
[2021-05-06 07:09:53,220 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-05-06 07:09:53,220 INFO  L480      AbstractCegarLoop]: Abstraction has 34 states and 37 transitions.
[2021-05-06 07:09:53,220 INFO  L481      AbstractCegarLoop]: Interpolant automaton has  has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3)
[2021-05-06 07:09:53,220 INFO  L276                IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions.
[2021-05-06 07:09:53,220 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 33
[2021-05-06 07:09:53,221 INFO  L515         BasicCegarLoop]: Found error trace
[2021-05-06 07:09:53,221 INFO  L523         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-05-06 07:09:53,437 WARN  L517      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1
[2021-05-06 07:09:53,437 INFO  L428      AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2021-05-06 07:09:53,438 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-05-06 07:09:53,438 INFO  L82        PathProgramCache]: Analyzing trace with hash -646008129, now seen corresponding path program 1 times
[2021-05-06 07:09:53,438 INFO  L162   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-05-06 07:09:53,438 INFO  L361   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121100560]
[2021-05-06 07:09:53,438 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-05-06 07:09:53,447 ERROR L278   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2021-05-06 07:09:53,447 INFO  L361   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1101553740]
[2021-05-06 07:09:53,448 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-05-06 07:09:53,507 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-05-06 07:09:53,508 INFO  L263         TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 22 conjunts are in the unsatisfiable core
[2021-05-06 07:09:53,511 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2021-05-06 07:09:53,585 WARN  L159       QuantifierPusher]: Ignoring assumption.
[2021-05-06 07:09:53,588 WARN  L159       QuantifierPusher]: Ignoring assumption.
[2021-05-06 07:09:53,670 WARN  L159       QuantifierPusher]: Ignoring assumption.
[2021-05-06 07:09:53,672 WARN  L159       QuantifierPusher]: Ignoring assumption.
[2021-05-06 07:09:53,682 WARN  L159       QuantifierPusher]: Ignoring assumption.
[2021-05-06 07:09:53,693 INFO  L134       CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2021-05-06 07:09:53,693 INFO  L179   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-05-06 07:09:53,693 INFO  L361   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121100560]
[2021-05-06 07:09:53,693 WARN  L340   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown
[2021-05-06 07:09:53,693 INFO  L361   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101553740]
[2021-05-06 07:09:53,693 INFO  L200   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101553740] provided 0 perfect and 1 imperfect interpolant sequences
[2021-05-06 07:09:53,694 INFO  L226   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2021-05-06 07:09:53,694 INFO  L239   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11
[2021-05-06 07:09:53,694 INFO  L155   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863313843]
[2021-05-06 07:09:53,694 INFO  L460      AbstractCegarLoop]: Interpolant automaton has 11 states
[2021-05-06 07:09:53,694 INFO  L142   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-05-06 07:09:53,695 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2021-05-06 07:09:53,695 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110
[2021-05-06 07:09:53,695 INFO  L87              Difference]: Start difference. First operand 34 states and 37 transitions. Second operand  has 11 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 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)
[2021-05-06 07:09:53,821 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-05-06 07:09:53,822 INFO  L93              Difference]: Finished difference Result 46 states and 52 transitions.
[2021-05-06 07:09:53,822 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. 
[2021-05-06 07:09:53,822 INFO  L78                 Accepts]: Start accepts. Automaton has  has 11 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 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 32
[2021-05-06 07:09:53,823 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-05-06 07:09:53,823 INFO  L225             Difference]: With dead ends: 46
[2021-05-06 07:09:53,823 INFO  L226             Difference]: Without dead ends: 44
[2021-05-06 07:09:53,824 INFO  L779         BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 93.7ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182
[2021-05-06 07:09:53,824 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 44 states.
[2021-05-06 07:09:53,842 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43.
[2021-05-06 07:09:53,842 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 43 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6)
[2021-05-06 07:09:53,845 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions.
[2021-05-06 07:09:53,846 INFO  L78                 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 32
[2021-05-06 07:09:53,846 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-05-06 07:09:53,846 INFO  L480      AbstractCegarLoop]: Abstraction has 43 states and 47 transitions.
[2021-05-06 07:09:53,846 INFO  L481      AbstractCegarLoop]: Interpolant automaton has  has 11 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 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)
[2021-05-06 07:09:53,847 INFO  L276                IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions.
[2021-05-06 07:09:53,848 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 33
[2021-05-06 07:09:53,848 INFO  L515         BasicCegarLoop]: Found error trace
[2021-05-06 07:09:53,848 INFO  L523         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-05-06 07:09:54,068 WARN  L517      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-05-06 07:09:54,069 INFO  L428      AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2021-05-06 07:09:54,069 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-05-06 07:09:54,069 INFO  L82        PathProgramCache]: Analyzing trace with hash 241495552, now seen corresponding path program 1 times
[2021-05-06 07:09:54,070 INFO  L162   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-05-06 07:09:54,070 INFO  L361   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554664047]
[2021-05-06 07:09:54,070 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-05-06 07:09:54,094 ERROR L278   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2021-05-06 07:09:54,095 INFO  L361   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [282236927]
[2021-05-06 07:09:54,095 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-05-06 07:09:54,171 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-05-06 07:09:54,172 INFO  L263         TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 22 conjunts are in the unsatisfiable core
[2021-05-06 07:09:54,173 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2021-05-06 07:09:54,314 WARN  L159       QuantifierPusher]: Ignoring assumption.
[2021-05-06 07:09:54,315 WARN  L159       QuantifierPusher]: Ignoring assumption.
[2021-05-06 07:09:54,323 WARN  L159       QuantifierPusher]: Ignoring assumption.
[2021-05-06 07:09:54,334 INFO  L134       CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2021-05-06 07:09:54,335 INFO  L179   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-05-06 07:09:54,335 INFO  L361   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554664047]
[2021-05-06 07:09:54,335 WARN  L340   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown
[2021-05-06 07:09:54,335 INFO  L361   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282236927]
[2021-05-06 07:09:54,335 INFO  L200   FreeRefinementEngine]: IpTcStrategyModuleZ3 [282236927] provided 0 perfect and 1 imperfect interpolant sequences
[2021-05-06 07:09:54,335 INFO  L226   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2021-05-06 07:09:54,335 INFO  L239   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9
[2021-05-06 07:09:54,335 INFO  L155   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580153287]
[2021-05-06 07:09:54,336 INFO  L460      AbstractCegarLoop]: Interpolant automaton has 9 states
[2021-05-06 07:09:54,336 INFO  L142   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-05-06 07:09:54,336 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2021-05-06 07:09:54,336 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72
[2021-05-06 07:09:54,336 INFO  L87              Difference]: Start difference. First operand 43 states and 47 transitions. Second operand  has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4)
[2021-05-06 07:09:54,450 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-05-06 07:09:54,451 INFO  L93              Difference]: Finished difference Result 54 states and 60 transitions.
[2021-05-06 07:09:54,451 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2021-05-06 07:09:54,451 INFO  L78                 Accepts]: Start accepts. Automaton has  has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32
[2021-05-06 07:09:54,451 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-05-06 07:09:54,452 INFO  L225             Difference]: With dead ends: 54
[2021-05-06 07:09:54,452 INFO  L226             Difference]: Without dead ends: 54
[2021-05-06 07:09:54,452 INFO  L779         BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 121.2ms TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110
[2021-05-06 07:09:54,452 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 54 states.
[2021-05-06 07:09:54,463 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50.
[2021-05-06 07:09:54,464 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 50 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 36 states have internal predecessors, (38), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7)
[2021-05-06 07:09:54,465 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions.
[2021-05-06 07:09:54,465 INFO  L78                 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 32
[2021-05-06 07:09:54,466 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-05-06 07:09:54,466 INFO  L480      AbstractCegarLoop]: Abstraction has 50 states and 54 transitions.
[2021-05-06 07:09:54,466 INFO  L481      AbstractCegarLoop]: Interpolant automaton has  has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4)
[2021-05-06 07:09:54,466 INFO  L276                IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions.
[2021-05-06 07:09:54,467 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 40
[2021-05-06 07:09:54,467 INFO  L515         BasicCegarLoop]: Found error trace
[2021-05-06 07:09:54,467 INFO  L523         BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-05-06 07:09:54,684 WARN  L517      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-05-06 07:09:54,684 INFO  L428      AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2021-05-06 07:09:54,685 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-05-06 07:09:54,685 INFO  L82        PathProgramCache]: Analyzing trace with hash -1661983408, now seen corresponding path program 1 times
[2021-05-06 07:09:54,685 INFO  L162   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-05-06 07:09:54,685 INFO  L361   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461627758]
[2021-05-06 07:09:54,686 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-05-06 07:09:54,700 ERROR L278   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2021-05-06 07:09:54,701 INFO  L361   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1822607517]
[2021-05-06 07:09:54,701 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-05-06 07:09:54,749 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-05-06 07:09:54,751 INFO  L263         TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 26 conjunts are in the unsatisfiable core
[2021-05-06 07:09:54,753 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2021-05-06 07:09:54,825 WARN  L159       QuantifierPusher]: Ignoring assumption.
[2021-05-06 07:09:54,827 WARN  L159       QuantifierPusher]: Ignoring assumption.
[2021-05-06 07:09:54,903 WARN  L159       QuantifierPusher]: Ignoring assumption.
[2021-05-06 07:09:54,904 WARN  L159       QuantifierPusher]: Ignoring assumption.
[2021-05-06 07:09:54,916 WARN  L159       QuantifierPusher]: Ignoring assumption.
[2021-05-06 07:09:54,930 WARN  L159       QuantifierPusher]: Ignoring assumption.
[2021-05-06 07:09:54,942 INFO  L134       CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked.
[2021-05-06 07:09:54,942 INFO  L179   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-05-06 07:09:54,942 INFO  L361   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461627758]
[2021-05-06 07:09:54,942 WARN  L340   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown
[2021-05-06 07:09:54,942 INFO  L361   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822607517]
[2021-05-06 07:09:54,942 INFO  L200   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822607517] provided 0 perfect and 1 imperfect interpolant sequences
[2021-05-06 07:09:54,942 INFO  L226   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2021-05-06 07:09:54,943 INFO  L239   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14
[2021-05-06 07:09:54,943 INFO  L155   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008374689]
[2021-05-06 07:09:54,943 INFO  L460      AbstractCegarLoop]: Interpolant automaton has 14 states
[2021-05-06 07:09:54,943 INFO  L142   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-05-06 07:09:54,943 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants.
[2021-05-06 07:09:54,944 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182
[2021-05-06 07:09:54,944 INFO  L87              Difference]: Start difference. First operand 50 states and 54 transitions. Second operand  has 14 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5)
[2021-05-06 07:09:55,158 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-05-06 07:09:55,158 INFO  L93              Difference]: Finished difference Result 59 states and 64 transitions.
[2021-05-06 07:09:55,158 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. 
[2021-05-06 07:09:55,158 INFO  L78                 Accepts]: Start accepts. Automaton has  has 14 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 39
[2021-05-06 07:09:55,159 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-05-06 07:09:55,159 INFO  L225             Difference]: With dead ends: 59
[2021-05-06 07:09:55,159 INFO  L226             Difference]: Without dead ends: 53
[2021-05-06 07:09:55,159 INFO  L779         BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 190.9ms TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342
[2021-05-06 07:09:55,160 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 53 states.
[2021-05-06 07:09:55,162 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 43.
[2021-05-06 07:09:55,162 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 43 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6)
[2021-05-06 07:09:55,162 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions.
[2021-05-06 07:09:55,162 INFO  L78                 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 39
[2021-05-06 07:09:55,162 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-05-06 07:09:55,162 INFO  L480      AbstractCegarLoop]: Abstraction has 43 states and 47 transitions.
[2021-05-06 07:09:55,163 INFO  L481      AbstractCegarLoop]: Interpolant automaton has  has 14 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5)
[2021-05-06 07:09:55,163 INFO  L276                IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions.
[2021-05-06 07:09:55,163 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 42
[2021-05-06 07:09:55,163 INFO  L515         BasicCegarLoop]: Found error trace
[2021-05-06 07:09:55,163 INFO  L523         BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-05-06 07:09:55,368 WARN  L517      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-05-06 07:09:55,369 INFO  L428      AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2021-05-06 07:09:55,369 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-05-06 07:09:55,369 INFO  L82        PathProgramCache]: Analyzing trace with hash 718222219, now seen corresponding path program 2 times
[2021-05-06 07:09:55,370 INFO  L162   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-05-06 07:09:55,370 INFO  L361   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395107189]
[2021-05-06 07:09:55,370 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-05-06 07:09:55,377 ERROR L278   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2021-05-06 07:09:55,377 INFO  L361   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [339419627]
[2021-05-06 07:09:55,377 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-05-06 07:09:55,428 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2021-05-06 07:09:55,428 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2021-05-06 07:09:55,429 INFO  L263         TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 30 conjunts are in the unsatisfiable core
[2021-05-06 07:09:55,431 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2021-05-06 07:09:55,671 WARN  L159       QuantifierPusher]: Ignoring assumption.
[2021-05-06 07:09:55,675 WARN  L159       QuantifierPusher]: Ignoring assumption.
[2021-05-06 07:09:55,689 WARN  L159       QuantifierPusher]: Ignoring assumption.
[2021-05-06 07:09:55,695 WARN  L159       QuantifierPusher]: Ignoring assumption.
[2021-05-06 07:09:55,701 WARN  L159       QuantifierPusher]: Ignoring assumption.
[2021-05-06 07:09:55,703 WARN  L159       QuantifierPusher]: Ignoring assumption.
[2021-05-06 07:09:55,705 WARN  L159       QuantifierPusher]: Ignoring assumption.
[2021-05-06 07:09:55,708 WARN  L159       QuantifierPusher]: Ignoring assumption.
[2021-05-06 07:09:55,721 WARN  L159       QuantifierPusher]: Ignoring assumption.
[2021-05-06 07:09:55,743 WARN  L159       QuantifierPusher]: Ignoring assumption.
[2021-05-06 07:09:55,757 WARN  L159       QuantifierPusher]: Ignoring assumption.
[2021-05-06 07:09:55,760 INFO  L134       CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked.
[2021-05-06 07:09:55,760 INFO  L179   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-05-06 07:09:55,760 INFO  L361   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395107189]
[2021-05-06 07:09:55,760 WARN  L340   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown
[2021-05-06 07:09:55,760 INFO  L361   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339419627]
[2021-05-06 07:09:55,760 INFO  L200   FreeRefinementEngine]: IpTcStrategyModuleZ3 [339419627] provided 0 perfect and 1 imperfect interpolant sequences
[2021-05-06 07:09:55,760 INFO  L226   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2021-05-06 07:09:55,761 INFO  L239   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12
[2021-05-06 07:09:55,761 INFO  L155   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220301504]
[2021-05-06 07:09:55,761 INFO  L460      AbstractCegarLoop]: Interpolant automaton has 13 states
[2021-05-06 07:09:55,761 INFO  L142   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-05-06 07:09:55,761 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants.
[2021-05-06 07:09:55,762 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156
[2021-05-06 07:09:55,762 INFO  L87              Difference]: Start difference. First operand 43 states and 47 transitions. Second operand  has 13 states, 10 states have (on average 2.6) internal successors, (26), 12 states have internal predecessors, (26), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5)
[2021-05-06 07:10:36,141 WARN  L205               SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37
[2021-05-06 07:10:48,092 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-05-06 07:10:48,093 INFO  L93              Difference]: Finished difference Result 54 states and 63 transitions.
[2021-05-06 07:10:48,093 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. 
[2021-05-06 07:10:48,093 INFO  L78                 Accepts]: Start accepts. Automaton has  has 13 states, 10 states have (on average 2.6) internal successors, (26), 12 states have internal predecessors, (26), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 41
[2021-05-06 07:10:48,093 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-05-06 07:10:48,093 INFO  L225             Difference]: With dead ends: 54
[2021-05-06 07:10:48,094 INFO  L226             Difference]: Without dead ends: 0
[2021-05-06 07:10:48,094 INFO  L779         BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 648.8ms TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272
[2021-05-06 07:10:48,094 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 0 states.
[2021-05-06 07:10:48,094 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0.
[2021-05-06 07:10:48,094 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)
[2021-05-06 07:10:48,094 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions.
[2021-05-06 07:10:48,094 INFO  L78                 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 41
[2021-05-06 07:10:48,094 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-05-06 07:10:48,094 INFO  L480      AbstractCegarLoop]: Abstraction has 0 states and 0 transitions.
[2021-05-06 07:10:48,095 INFO  L481      AbstractCegarLoop]: Interpolant automaton has  has 13 states, 10 states have (on average 2.6) internal successors, (26), 12 states have internal predecessors, (26), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5)
[2021-05-06 07:10:48,095 INFO  L276                IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions.
[2021-05-06 07:10:48,095 INFO  L282                IsEmpty]: Finished isEmpty. No accepting run.
[2021-05-06 07:10:48,301 WARN  L517      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6
[2021-05-06 07:10:48,304 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 07:10:48 BasicIcfg
[2021-05-06 07:10:48,304 INFO  L132        PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2021-05-06 07:10:48,304 INFO  L168              Benchmark]: Toolchain (without parser) took 56323.48 ms. Allocated memory was 198.2 MB in the beginning and 238.0 MB in the end (delta: 39.8 MB). Free memory was 163.6 MB in the beginning and 90.2 MB in the end (delta: 73.4 MB). Peak memory consumption was 113.5 MB. Max. memory is 8.0 GB.
[2021-05-06 07:10:48,305 INFO  L168              Benchmark]: CDTParser took 0.08 ms. Allocated memory is still 198.2 MB. Free memory is still 180.2 MB. There was no memory consumed. Max. memory is 8.0 GB.
[2021-05-06 07:10:48,305 INFO  L168              Benchmark]: CACSL2BoogieTranslator took 232.15 ms. Allocated memory is still 198.2 MB. Free memory was 163.4 MB in the beginning and 181.6 MB in the end (delta: -18.1 MB). Peak memory consumption was 14.1 MB. Max. memory is 8.0 GB.
[2021-05-06 07:10:48,305 INFO  L168              Benchmark]: Boogie Preprocessor took 42.74 ms. Allocated memory is still 198.2 MB. Free memory was 181.6 MB in the beginning and 179.7 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB.
[2021-05-06 07:10:48,305 INFO  L168              Benchmark]: RCFGBuilder took 261.30 ms. Allocated memory is still 198.2 MB. Free memory was 179.7 MB in the beginning and 164.5 MB in the end (delta: 15.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB.
[2021-05-06 07:10:48,305 INFO  L168              Benchmark]: IcfgTransformer took 11.61 ms. Allocated memory is still 198.2 MB. Free memory was 164.5 MB in the beginning and 163.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB.
[2021-05-06 07:10:48,305 INFO  L168              Benchmark]: TraceAbstraction took 55764.87 ms. Allocated memory was 198.2 MB in the beginning and 238.0 MB in the end (delta: 39.8 MB). Free memory was 163.0 MB in the beginning and 90.2 MB in the end (delta: 72.7 MB). Peak memory consumption was 112.0 MB. Max. memory is 8.0 GB.
[2021-05-06 07:10:48,306 INFO  L339   ainManager$Toolchain]: #######################  End [Toolchain 1] #######################
 --- Results ---
 * Results from de.uni_freiburg.informatik.ultimate.core:
  - StatisticsResult: Toolchain Benchmarks
    Benchmark results are:
 * CDTParser took 0.08 ms. Allocated memory is still 198.2 MB. Free memory is still 180.2 MB. There was no memory consumed. Max. memory is 8.0 GB.
 * CACSL2BoogieTranslator took 232.15 ms. Allocated memory is still 198.2 MB. Free memory was 163.4 MB in the beginning and 181.6 MB in the end (delta: -18.1 MB). Peak memory consumption was 14.1 MB. Max. memory is 8.0 GB.
 * Boogie Preprocessor took 42.74 ms. Allocated memory is still 198.2 MB. Free memory was 181.6 MB in the beginning and 179.7 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB.
 * RCFGBuilder took 261.30 ms. Allocated memory is still 198.2 MB. Free memory was 179.7 MB in the beginning and 164.5 MB in the end (delta: 15.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB.
 * IcfgTransformer took 11.61 ms. Allocated memory is still 198.2 MB. Free memory was 164.5 MB in the beginning and 163.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB.
 * TraceAbstraction took 55764.87 ms. Allocated memory was 198.2 MB in the beginning and 238.0 MB in the end (delta: 39.8 MB). Free memory was 163.0 MB in the beginning and 90.2 MB in the end (delta: 72.7 MB). Peak memory consumption was 112.0 MB. Max. memory is 8.0 GB.
 * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
  - PositiveResult [Line: 16]: 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, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 55733.6ms, OverallIterations: 6, TraceHistogramMax: 3, EmptinessCheckTime: 16.0ms, AutomataDifference: 52935.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 145 SDtfs, 100 SDslu, 727 SDs, 0 SdLazy, 833 SolverSat, 39 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 52072.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 188 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 1131.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=50occurred in iteration=4, InterpolantAutomatonStates: 55, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 55.3ms AutomataMinimizationTime, 6 MinimizatonAttempts, 16 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 54.2ms SsaConstructionTime, 163.8ms SatisfiabilityAnalysisTime, 1140.3ms InterpolantComputationTime, 190 NumberOfCodeBlocks, 190 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 184 ConstructedInterpolants, 0 QuantifiedInterpolants, 936 SizeOfPredicates, 23 NumberOfNonLiveVariables, 703 ConjunctsInSsa, 113 ConjunctsInUnsatCore, 6 InterpolantComputations, 2 PerfectInterpolantSequences, 42/60 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!
Received shutdown request...