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


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


This is Ultimate 0.2.2-dev-a10ec3b
[2022-01-10 08:38:40,480 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2022-01-10 08:38:40,481 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2022-01-10 08:38:40,505 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2022-01-10 08:38:40,505 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2022-01-10 08:38:40,538 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2022-01-10 08:38:40,539 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2022-01-10 08:38:40,541 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2022-01-10 08:38:40,542 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2022-01-10 08:38:40,543 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
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[2022-01-10 08:38:40,544 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2022-01-10 08:38:40,544 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2022-01-10 08:38:40,545 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2022-01-10 08:38:40,546 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2022-01-10 08:38:40,546 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2022-01-10 08:38:40,551 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2022-01-10 08:38:40,553 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2022-01-10 08:38:40,558 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2022-01-10 08:38:40,560 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2022-01-10 08:38:40,561 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2022-01-10 08:38:40,562 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2022-01-10 08:38:40,563 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2022-01-10 08:38:40,568 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2022-01-10 08:38:40,569 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2022-01-10 08:38:40,569 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2022-01-10 08:38:40,570 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2022-01-10 08:38:40,570 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2022-01-10 08:38:40,571 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2022-01-10 08:38:40,571 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2022-01-10 08:38:40,571 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2022-01-10 08:38:40,572 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2022-01-10 08:38:40,573 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2022-01-10 08:38:40,574 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2022-01-10 08:38:40,574 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2022-01-10 08:38:40,574 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2022-01-10 08:38:40,574 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2022-01-10 08:38:40,575 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2022-01-10 08:38:40,575 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2022-01-10 08:38:40,575 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2022-01-10 08:38:40,577 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_BITWISE.epf
[2022-01-10 08:38:40,598 INFO  L113        SettingsManager]: Loading preferences was successful
[2022-01-10 08:38:40,599 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2022-01-10 08:38:40,599 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2022-01-10 08:38:40,599 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2022-01-10 08:38:40,600 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2022-01-10 08:38:40,600 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2022-01-10 08:38:40,600 INFO  L138        SettingsManager]:  * Use SBE=true
[2022-01-10 08:38:40,600 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2022-01-10 08:38:40,600 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2022-01-10 08:38:40,600 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2022-01-10 08:38:40,600 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2022-01-10 08:38:40,600 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2022-01-10 08:38:40,600 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2022-01-10 08:38:40,600 INFO  L138        SettingsManager]:  * Adapt memory model on pointer casts if necessary=true
[2022-01-10 08:38:40,600 INFO  L138        SettingsManager]:  * Use bitvectors instead of ints=true
[2022-01-10 08:38:40,600 INFO  L138        SettingsManager]:  * Memory model=HoenickeLindenmann_4ByteResolution
[2022-01-10 08:38:40,601 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2022-01-10 08:38:40,601 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2022-01-10 08:38:40,601 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2022-01-10 08:38:40,601 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2022-01-10 08:38:40,601 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2022-01-10 08:38:40,601 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-01-10 08:38:40,601 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2022-01-10 08:38:40,601 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2022-01-10 08:38:40,601 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2022-01-10 08:38:40,601 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2022-01-10 08:38:40,601 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2022-01-10 08:38:40,602 INFO  L138        SettingsManager]:  * Large block encoding in concurrent analysis=OFF
[2022-01-10 08:38:40,602 INFO  L138        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2022-01-10 08:38:40,602 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2022-01-10 08:38:40,602 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2022-01-10 08:38:40,602 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2022-01-10 08:38:40,602 INFO  L136        SettingsManager]: Preferences of IcfgTransformer differ from their defaults:
[2022-01-10 08:38:40,602 INFO  L138        SettingsManager]:  * TransformationType=BV_TO_INT_BITWISE
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int)
WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN;
[2022-01-10 08:38:40,792 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2022-01-10 08:38:40,805 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2022-01-10 08:38:40,807 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2022-01-10 08:38:40,807 INFO  L271        PluginConnector]: Initializing CDTParser...
[2022-01-10 08:38:40,809 INFO  L275        PluginConnector]: CDTParser initialized
[2022-01-10 08:38:40,810 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/gauss_sum.i
[2022-01-10 08:38:40,853 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8b0d328f/2ffff2d68c2f4efc8b72bedaf26928a6/FLAGcdded235a
[2022-01-10 08:38:41,159 INFO  L306              CDTParser]: Found 1 translation units.
[2022-01-10 08:38:41,159 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/gauss_sum.i
[2022-01-10 08:38:41,172 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8b0d328f/2ffff2d68c2f4efc8b72bedaf26928a6/FLAGcdded235a
[2022-01-10 08:38:41,588 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8b0d328f/2ffff2d68c2f4efc8b72bedaf26928a6
[2022-01-10 08:38:41,590 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2022-01-10 08:38:41,591 INFO  L131        ToolchainWalker]: Walking toolchain with 6 elements.
[2022-01-10 08:38:41,592 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2022-01-10 08:38:41,592 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2022-01-10 08:38:41,594 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2022-01-10 08:38:41,595 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 08:38:41" (1/1) ...
[2022-01-10 08:38:41,596 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@193aca08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:38:41, skipping insertion in model container
[2022-01-10 08:38:41,596 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 08:38:41" (1/1) ...
[2022-01-10 08:38:41,600 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2022-01-10 08:38:41,609 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2022-01-10 08:38:41,706 WARN  L230   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-new/gauss_sum.i[891,904]
[2022-01-10 08:38:41,714 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-01-10 08:38:41,724 INFO  L203         MainTranslator]: Completed pre-run
[2022-01-10 08:38:41,734 WARN  L230   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-new/gauss_sum.i[891,904]
[2022-01-10 08:38:41,736 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-01-10 08:38:41,744 INFO  L208         MainTranslator]: Completed translation
[2022-01-10 08:38:41,744 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:38:41 WrapperNode
[2022-01-10 08:38:41,744 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2022-01-10 08:38:41,745 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2022-01-10 08:38:41,745 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2022-01-10 08:38:41,745 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2022-01-10 08:38:41,759 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:38:41" (1/1) ...
[2022-01-10 08:38:41,765 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:38:41" (1/1) ...
[2022-01-10 08:38:41,778 INFO  L137                Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 36
[2022-01-10 08:38:41,778 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2022-01-10 08:38:41,779 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2022-01-10 08:38:41,779 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2022-01-10 08:38:41,779 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2022-01-10 08:38:41,784 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:38:41" (1/1) ...
[2022-01-10 08:38:41,784 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:38:41" (1/1) ...
[2022-01-10 08:38:41,787 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:38:41" (1/1) ...
[2022-01-10 08:38:41,788 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:38:41" (1/1) ...
[2022-01-10 08:38:41,798 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:38:41" (1/1) ...
[2022-01-10 08:38:41,800 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:38:41" (1/1) ...
[2022-01-10 08:38:41,805 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:38:41" (1/1) ...
[2022-01-10 08:38:41,811 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2022-01-10 08:38:41,812 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2022-01-10 08:38:41,812 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2022-01-10 08:38:41,812 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2022-01-10 08:38:41,813 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:38:41" (1/1) ...
[2022-01-10 08:38:41,817 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-01-10 08:38:41,825 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-10 08:38:41,835 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2022-01-10 08:38:41,853 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2022-01-10 08:38:41,860 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2022-01-10 08:38:41,861 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1
[2022-01-10 08:38:41,861 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2022-01-10 08:38:41,861 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2022-01-10 08:38:41,903 INFO  L234             CfgBuilder]: Building ICFG
[2022-01-10 08:38:41,904 INFO  L260             CfgBuilder]: Building CFG for each procedure with an implementation
[2022-01-10 08:38:41,982 INFO  L275             CfgBuilder]: Performing block encoding
[2022-01-10 08:38:41,986 INFO  L294             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2022-01-10 08:38:41,986 INFO  L299             CfgBuilder]: Removed 1 assume(true) statements.
[2022-01-10 08:38:41,987 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 08:38:41 BoogieIcfgContainer
[2022-01-10 08:38:41,988 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2022-01-10 08:38:41,988 INFO  L113        PluginConnector]: ------------------------IcfgTransformer----------------------------
[2022-01-10 08:38:41,988 INFO  L271        PluginConnector]: Initializing IcfgTransformer...
[2022-01-10 08:38:41,989 INFO  L275        PluginConnector]: IcfgTransformer initialized
[2022-01-10 08:38:41,991 INFO  L185        PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 08:38:41" (1/1) ...
[2022-01-10 08:38:42,027 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 08:38:42 BasicIcfg
[2022-01-10 08:38:42,028 INFO  L132        PluginConnector]: ------------------------ END IcfgTransformer----------------------------
[2022-01-10 08:38:42,043 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2022-01-10 08:38:42,043 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2022-01-10 08:38:42,045 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2022-01-10 08:38:42,046 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 08:38:41" (1/4) ...
[2022-01-10 08:38:42,046 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f2e15ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 08:38:42, skipping insertion in model container
[2022-01-10 08:38:42,046 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:38:41" (2/4) ...
[2022-01-10 08:38:42,046 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f2e15ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 08:38:42, skipping insertion in model container
[2022-01-10 08:38:42,047 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 08:38:41" (3/4) ...
[2022-01-10 08:38:42,047 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f2e15ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 08:38:42, skipping insertion in model container
[2022-01-10 08:38:42,047 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 08:38:42" (4/4) ...
[2022-01-10 08:38:42,048 INFO  L111   eAbstractionObserver]: Analyzing ICFG gauss_sum.iTransformedIcfg
[2022-01-10 08:38:42,051 INFO  L204   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2022-01-10 08:38:42,051 INFO  L163   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2022-01-10 08:38:42,113 INFO  L338      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2022-01-10 08:38:42,121 INFO  L339      AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR
[2022-01-10 08:38:42,121 INFO  L340      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2022-01-10 08:38:42,131 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 08:38:42,135 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8
[2022-01-10 08:38:42,135 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 08:38:42,135 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1]
[2022-01-10 08:38:42,136 INFO  L402      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 08:38:42,142 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 08:38:42,142 INFO  L85        PathProgramCache]: Analyzing trace with hash 429766571, now seen corresponding path program 1 times
[2022-01-10 08:38:42,148 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 08:38:42,149 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599255152]
[2022-01-10 08:38:42,149 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 08:38:42,149 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 08:38:42,240 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 08:38:42,282 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 08:38:42,282 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 08:38:42,283 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599255152]
[2022-01-10 08:38:42,284 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599255152] provided 1 perfect and 0 imperfect interpolant sequences
[2022-01-10 08:38:42,284 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-01-10 08:38:42,284 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2022-01-10 08:38:42,285 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925587851]
[2022-01-10 08:38:42,286 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-10 08:38:42,288 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 2 states
[2022-01-10 08:38:42,289 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-10 08:38:42,310 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2022-01-10 08:38:42,311 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2022-01-10 08:38:42,313 INFO  L87              Difference]: Start difference. First operand  has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand  has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 08:38:42,322 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 08:38:42,322 INFO  L93              Difference]: Finished difference Result 21 states and 24 transitions.
[2022-01-10 08:38:42,323 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. 
[2022-01-10 08:38:42,324 INFO  L78                 Accepts]: Start accepts. Automaton has  has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7
[2022-01-10 08:38:42,324 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 08:38:42,328 INFO  L225             Difference]: With dead ends: 21
[2022-01-10 08:38:42,328 INFO  L226             Difference]: Without dead ends: 9
[2022-01-10 08:38:42,331 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2022-01-10 08:38:42,334 INFO  L933         BasicCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-01-10 08:38:42,335 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-01-10 08:38:42,347 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9 states.
[2022-01-10 08:38:42,359 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9.
[2022-01-10 08:38:42,360 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 08:38:42,360 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions.
[2022-01-10 08:38:42,361 INFO  L78                 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7
[2022-01-10 08:38:42,361 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 08:38:42,362 INFO  L470      AbstractCegarLoop]: Abstraction has 9 states and 9 transitions.
[2022-01-10 08:38:42,362 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 08:38:42,363 INFO  L276                IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions.
[2022-01-10 08:38:42,363 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8
[2022-01-10 08:38:42,363 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 08:38:42,363 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1]
[2022-01-10 08:38:42,364 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2022-01-10 08:38:42,364 INFO  L402      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 08:38:42,366 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 08:38:42,367 INFO  L85        PathProgramCache]: Analyzing trace with hash 429796362, now seen corresponding path program 1 times
[2022-01-10 08:38:42,367 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 08:38:42,367 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110730135]
[2022-01-10 08:38:42,367 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 08:38:42,367 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 08:38:42,396 ERROR L247   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-01-10 08:38:42,396 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [909513182]
[2022-01-10 08:38:42,396 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 08:38:42,397 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-10 08:38:42,397 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-10 08:38:42,398 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-01-10 08:38:42,399 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2022-01-10 08:38:42,447 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 08:38:42,449 INFO  L263         TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 4 conjunts are in the unsatisfiable core
[2022-01-10 08:38:42,451 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 08:38:42,530 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 08:38:42,531 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2022-01-10 08:38:42,531 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 08:38:42,531 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110730135]
[2022-01-10 08:38:42,531 WARN  L312   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-01-10 08:38:42,531 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909513182]
[2022-01-10 08:38:42,531 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [909513182] provided 1 perfect and 0 imperfect interpolant sequences
[2022-01-10 08:38:42,532 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-01-10 08:38:42,532 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2022-01-10 08:38:42,532 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039958535]
[2022-01-10 08:38:42,532 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-10 08:38:42,533 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-01-10 08:38:42,533 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-10 08:38:42,533 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-01-10 08:38:42,533 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-01-10 08:38:42,534 INFO  L87              Difference]: Start difference. First operand 9 states and 9 transitions. Second operand  has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 08:38:42,545 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 08:38:42,546 INFO  L93              Difference]: Finished difference Result 15 states and 15 transitions.
[2022-01-10 08:38:42,546 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-01-10 08:38:42,546 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7
[2022-01-10 08:38:42,546 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 08:38:42,546 INFO  L225             Difference]: With dead ends: 15
[2022-01-10 08:38:42,547 INFO  L226             Difference]: Without dead ends: 11
[2022-01-10 08:38:42,547 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-01-10 08:38:42,549 INFO  L933         BasicCegarLoop]: 7 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-01-10 08:38:42,549 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 10 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-01-10 08:38:42,551 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 11 states.
[2022-01-10 08:38:42,553 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 10.
[2022-01-10 08:38:42,553 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 08:38:42,553 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions.
[2022-01-10 08:38:42,553 INFO  L78                 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 7
[2022-01-10 08:38:42,553 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 08:38:42,554 INFO  L470      AbstractCegarLoop]: Abstraction has 10 states and 10 transitions.
[2022-01-10 08:38:42,554 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 08:38:42,554 INFO  L276                IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions.
[2022-01-10 08:38:42,554 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10
[2022-01-10 08:38:42,554 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 08:38:42,554 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 08:38:42,572 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2022-01-10 08:38:42,773 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-10 08:38:42,773 INFO  L402      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 08:38:42,774 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 08:38:42,774 INFO  L85        PathProgramCache]: Analyzing trace with hash 746844845, now seen corresponding path program 1 times
[2022-01-10 08:38:42,774 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 08:38:42,774 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223832702]
[2022-01-10 08:38:42,774 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 08:38:42,774 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 08:38:42,786 ERROR L247   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-01-10 08:38:42,786 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1625055349]
[2022-01-10 08:38:42,786 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 08:38:42,786 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-10 08:38:42,786 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-10 08:38:42,790 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-01-10 08:38:42,795 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2022-01-10 08:38:42,842 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 08:38:42,848 INFO  L263         TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 18 conjunts are in the unsatisfiable core
[2022-01-10 08:38:42,849 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 08:38:43,127 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 08:38:43,127 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-01-10 08:38:53,235 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 08:38:53,235 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 08:38:53,235 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223832702]
[2022-01-10 08:38:53,236 WARN  L312   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-01-10 08:38:53,236 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625055349]
[2022-01-10 08:38:53,236 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625055349] provided 0 perfect and 2 imperfect interpolant sequences
[2022-01-10 08:38:53,236 INFO  L186   FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2022-01-10 08:38:53,236 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11
[2022-01-10 08:38:53,236 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523868664]
[2022-01-10 08:38:53,236 INFO  L85    oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2022-01-10 08:38:53,237 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 11 states
[2022-01-10 08:38:53,237 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-10 08:38:53,237 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2022-01-10 08:38:53,237 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=80, Unknown=1, NotChecked=0, Total=110
[2022-01-10 08:38:53,238 INFO  L87              Difference]: Start difference. First operand 10 states and 10 transitions. Second operand  has 11 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 08:38:55,430 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 08:38:55,430 INFO  L93              Difference]: Finished difference Result 20 states and 21 transitions.
[2022-01-10 08:38:55,431 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. 
[2022-01-10 08:38:55,431 INFO  L78                 Accepts]: Start accepts. Automaton has  has 11 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9
[2022-01-10 08:38:55,431 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 08:38:55,431 INFO  L225             Difference]: With dead ends: 20
[2022-01-10 08:38:55,431 INFO  L226             Difference]: Without dead ends: 14
[2022-01-10 08:38:55,432 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=62, Invalid=147, Unknown=1, NotChecked=0, Total=210
[2022-01-10 08:38:55,432 INFO  L933         BasicCegarLoop]: 5 mSDtfsCounter, 7 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time
[2022-01-10 08:38:55,433 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 24 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time]
[2022-01-10 08:38:55,433 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 14 states.
[2022-01-10 08:38:55,436 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14.
[2022-01-10 08:38:55,436 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 14 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 13 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 08:38:55,436 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions.
[2022-01-10 08:38:55,436 INFO  L78                 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 9
[2022-01-10 08:38:55,436 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 08:38:55,436 INFO  L470      AbstractCegarLoop]: Abstraction has 14 states and 14 transitions.
[2022-01-10 08:38:55,436 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 11 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 08:38:55,437 INFO  L276                IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions.
[2022-01-10 08:38:55,437 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 14
[2022-01-10 08:38:55,437 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 08:38:55,437 INFO  L514         BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 08:38:55,453 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0
[2022-01-10 08:38:55,637 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2
[2022-01-10 08:38:55,638 INFO  L402      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 08:38:55,638 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 08:38:55,638 INFO  L85        PathProgramCache]: Analyzing trace with hash 614357427, now seen corresponding path program 2 times
[2022-01-10 08:38:55,638 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 08:38:55,638 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361777678]
[2022-01-10 08:38:55,639 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 08:38:55,639 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 08:38:55,660 ERROR L247   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-01-10 08:38:55,660 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1376400882]
[2022-01-10 08:38:55,660 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2022-01-10 08:38:55,661 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-10 08:38:55,661 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-10 08:38:55,662 INFO  L229       MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-01-10 08:38:55,663 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2022-01-10 08:38:55,768 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2022-01-10 08:38:55,769 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-01-10 08:38:55,770 INFO  L263         TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 34 conjunts are in the unsatisfiable core
[2022-01-10 08:38:55,771 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 08:38:56,060 INFO  L134       CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 08:38:56,060 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-01-10 08:39:19,277 INFO  L134       CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 08:39:19,277 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 08:39:19,277 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361777678]
[2022-01-10 08:39:19,277 WARN  L312   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-01-10 08:39:19,277 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376400882]
[2022-01-10 08:39:19,277 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376400882] provided 0 perfect and 2 imperfect interpolant sequences
[2022-01-10 08:39:19,277 INFO  L186   FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2022-01-10 08:39:19,278 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19
[2022-01-10 08:39:19,278 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578164615]
[2022-01-10 08:39:19,278 INFO  L85    oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2022-01-10 08:39:19,278 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 19 states
[2022-01-10 08:39:19,278 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-10 08:39:19,278 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants.
[2022-01-10 08:39:19,279 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=272, Unknown=2, NotChecked=0, Total=342
[2022-01-10 08:39:19,279 INFO  L87              Difference]: Start difference. First operand 14 states and 14 transitions. Second operand  has 19 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 08:39:32,396 WARN  L228               SmtUtils]: Spent 11.54s on a formula simplification that was a NOOP. DAG size: 64 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)
[2022-01-10 08:39:45,735 WARN  L228               SmtUtils]: Spent 7.54s on a formula simplification that was a NOOP. DAG size: 50 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)
[2022-01-10 08:40:00,125 WARN  L534   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []
[2022-01-10 08:40:00,128 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 08:40:00,129 INFO  L93              Difference]: Finished difference Result 28 states and 31 transitions.
[2022-01-10 08:40:00,129 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. 
[2022-01-10 08:40:00,129 INFO  L78                 Accepts]: Start accepts. Automaton has  has 19 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13
[2022-01-10 08:40:00,129 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 08:40:00,129 INFO  L225             Difference]: With dead ends: 28
[2022-01-10 08:40:00,130 INFO  L226             Difference]: Without dead ends: 22
[2022-01-10 08:40:00,130 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 53.4s TimeCoverageRelationStatistics Valid=189, Invalid=621, Unknown=2, NotChecked=0, Total=812
[2022-01-10 08:40:00,131 INFO  L933         BasicCegarLoop]: 5 mSDtfsCounter, 23 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 25 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time
[2022-01-10 08:40:00,131 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 35 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 114 Invalid, 1 Unknown, 0 Unchecked, 4.4s Time]
[2022-01-10 08:40:00,131 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 22 states.
[2022-01-10 08:40:00,134 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22.
[2022-01-10 08:40:00,134 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 22 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 21 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 08:40:00,134 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions.
[2022-01-10 08:40:00,134 INFO  L78                 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 13
[2022-01-10 08:40:00,134 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 08:40:00,134 INFO  L470      AbstractCegarLoop]: Abstraction has 22 states and 22 transitions.
[2022-01-10 08:40:00,135 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 19 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 08:40:00,135 INFO  L276                IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions.
[2022-01-10 08:40:00,135 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2022-01-10 08:40:00,141 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 08:40:00,141 INFO  L514         BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 08:40:00,145 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0
[2022-01-10 08:40:00,341 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-10 08:40:00,342 INFO  L402      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 08:40:00,342 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 08:40:00,342 INFO  L85        PathProgramCache]: Analyzing trace with hash 1809829567, now seen corresponding path program 3 times
[2022-01-10 08:40:00,342 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 08:40:00,342 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153791149]
[2022-01-10 08:40:00,342 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 08:40:00,343 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 08:40:00,365 ERROR L247   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-01-10 08:40:00,365 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1775697635]
[2022-01-10 08:40:00,365 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2022-01-10 08:40:00,365 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-10 08:40:00,365 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-10 08:40:00,369 INFO  L229       MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-01-10 08:40:00,370 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2022-01-10 08:40:01,871 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s)
[2022-01-10 08:40:01,871 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-01-10 08:40:01,874 INFO  L263         TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 69 conjunts are in the unsatisfiable core
[2022-01-10 08:40:01,876 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 08:40:02,436 INFO  L134       CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 08:40:02,437 INFO  L328         TraceCheckSpWp]: Computing backward predicates...