/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInlineTransformed.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_LAZY.epf -i ../../../trunk/examples/svcomp/nla-digbench/hard2.c


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


This is Ultimate 0.2.2-dev-a10ec3b
[2022-01-10 14:37:50,997 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2022-01-10 14:37:50,998 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2022-01-10 14:37:51,050 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2022-01-10 14:37:51,050 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2022-01-10 14:37:51,051 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2022-01-10 14:37:51,052 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2022-01-10 14:37:51,053 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2022-01-10 14:37:51,054 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2022-01-10 14:37:51,060 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
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[2022-01-10 14:37:51,061 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2022-01-10 14:37:51,061 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2022-01-10 14:37:51,062 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2022-01-10 14:37:51,063 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2022-01-10 14:37:51,064 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2022-01-10 14:37:51,064 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2022-01-10 14:37:51,065 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2022-01-10 14:37:51,066 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2022-01-10 14:37:51,067 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2022-01-10 14:37:51,068 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2022-01-10 14:37:51,074 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2022-01-10 14:37:51,074 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2022-01-10 14:37:51,075 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2022-01-10 14:37:51,076 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2022-01-10 14:37:51,076 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2022-01-10 14:37:51,077 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2022-01-10 14:37:51,077 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2022-01-10 14:37:51,077 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2022-01-10 14:37:51,078 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2022-01-10 14:37:51,078 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2022-01-10 14:37:51,078 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2022-01-10 14:37:51,079 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2022-01-10 14:37:51,079 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2022-01-10 14:37:51,080 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2022-01-10 14:37:51,080 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2022-01-10 14:37:51,081 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2022-01-10 14:37:51,081 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2022-01-10 14:37:51,081 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2022-01-10 14:37:51,081 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2022-01-10 14:37:51,082 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2022-01-10 14:37:51,083 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_LAZY.epf
[2022-01-10 14:37:51,100 INFO  L113        SettingsManager]: Loading preferences was successful
[2022-01-10 14:37:51,101 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2022-01-10 14:37:51,101 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2022-01-10 14:37:51,101 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2022-01-10 14:37:51,102 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2022-01-10 14:37:51,102 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2022-01-10 14:37:51,102 INFO  L138        SettingsManager]:  * Use SBE=true
[2022-01-10 14:37:51,102 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2022-01-10 14:37:51,103 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2022-01-10 14:37:51,103 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2022-01-10 14:37:51,103 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2022-01-10 14:37:51,103 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2022-01-10 14:37:51,103 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2022-01-10 14:37:51,103 INFO  L138        SettingsManager]:  * Adapt memory model on pointer casts if necessary=true
[2022-01-10 14:37:51,104 INFO  L138        SettingsManager]:  * Use bitvectors instead of ints=true
[2022-01-10 14:37:51,104 INFO  L138        SettingsManager]:  * Memory model=HoenickeLindenmann_4ByteResolution
[2022-01-10 14:37:51,104 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2022-01-10 14:37:51,104 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2022-01-10 14:37:51,104 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2022-01-10 14:37:51,104 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2022-01-10 14:37:51,104 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2022-01-10 14:37:51,104 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-01-10 14:37:51,105 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2022-01-10 14:37:51,105 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2022-01-10 14:37:51,105 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2022-01-10 14:37:51,105 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2022-01-10 14:37:51,105 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2022-01-10 14:37:51,105 INFO  L138        SettingsManager]:  * Large block encoding in concurrent analysis=OFF
[2022-01-10 14:37:51,106 INFO  L138        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2022-01-10 14:37:51,106 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2022-01-10 14:37:51,106 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2022-01-10 14:37:51,106 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2022-01-10 14:37:51,106 INFO  L136        SettingsManager]: Preferences of IcfgTransformer differ from their defaults:
[2022-01-10 14:37:51,107 INFO  L138        SettingsManager]:  * TransformationType=BV_TO_INT_LAZY
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int)
WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN;
[2022-01-10 14:37:51,290 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2022-01-10 14:37:51,307 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2022-01-10 14:37:51,308 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2022-01-10 14:37:51,309 INFO  L271        PluginConnector]: Initializing CDTParser...
[2022-01-10 14:37:51,310 INFO  L275        PluginConnector]: CDTParser initialized
[2022-01-10 14:37:51,311 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/hard2.c
[2022-01-10 14:37:51,357 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a01514fb/7605d322d7c945c387c59dee8f6617a2/FLAG34ebd84d6
[2022-01-10 14:37:51,737 INFO  L306              CDTParser]: Found 1 translation units.
[2022-01-10 14:37:51,737 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/hard2.c
[2022-01-10 14:37:51,744 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a01514fb/7605d322d7c945c387c59dee8f6617a2/FLAG34ebd84d6
[2022-01-10 14:37:51,752 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a01514fb/7605d322d7c945c387c59dee8f6617a2
[2022-01-10 14:37:51,754 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2022-01-10 14:37:51,756 INFO  L131        ToolchainWalker]: Walking toolchain with 6 elements.
[2022-01-10 14:37:51,758 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2022-01-10 14:37:51,758 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2022-01-10 14:37:51,762 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2022-01-10 14:37:51,762 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 02:37:51" (1/1) ...
[2022-01-10 14:37:51,763 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@93529cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:37:51, skipping insertion in model container
[2022-01-10 14:37:51,763 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 02:37:51" (1/1) ...
[2022-01-10 14:37:51,768 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2022-01-10 14:37:51,779 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2022-01-10 14:37:51,905 WARN  L230   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/hard2.c[526,539]
[2022-01-10 14:37:51,920 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-01-10 14:37:51,928 INFO  L203         MainTranslator]: Completed pre-run
[2022-01-10 14:37:51,942 WARN  L230   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/hard2.c[526,539]
[2022-01-10 14:37:51,950 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-01-10 14:37:51,959 INFO  L208         MainTranslator]: Completed translation
[2022-01-10 14:37:51,959 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:37:51 WrapperNode
[2022-01-10 14:37:51,959 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2022-01-10 14:37:51,960 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2022-01-10 14:37:51,960 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2022-01-10 14:37:51,960 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2022-01-10 14:37:51,965 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:37:51" (1/1) ...
[2022-01-10 14:37:51,970 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:37:51" (1/1) ...
[2022-01-10 14:37:51,981 INFO  L137                Inliner]: procedures = 14, calls = 14, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 86
[2022-01-10 14:37:51,981 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2022-01-10 14:37:51,982 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2022-01-10 14:37:51,982 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2022-01-10 14:37:51,982 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2022-01-10 14:37:51,986 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:37:51" (1/1) ...
[2022-01-10 14:37:51,986 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:37:51" (1/1) ...
[2022-01-10 14:37:51,988 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:37:51" (1/1) ...
[2022-01-10 14:37:51,988 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:37:51" (1/1) ...
[2022-01-10 14:37:51,991 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:37:51" (1/1) ...
[2022-01-10 14:37:51,993 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:37:51" (1/1) ...
[2022-01-10 14:37:51,994 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:37:51" (1/1) ...
[2022-01-10 14:37:51,995 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2022-01-10 14:37:51,996 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2022-01-10 14:37:51,996 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2022-01-10 14:37:51,996 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2022-01-10 14:37:52,003 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:37:51" (1/1) ...
[2022-01-10 14:37:52,008 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-01-10 14:37:52,017 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-10 14:37:52,027 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 14:37:52,029 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 14:37:52,057 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2022-01-10 14:37:52,057 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1
[2022-01-10 14:37:52,057 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2022-01-10 14:37:52,057 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2022-01-10 14:37:52,102 INFO  L234             CfgBuilder]: Building ICFG
[2022-01-10 14:37:52,103 INFO  L260             CfgBuilder]: Building CFG for each procedure with an implementation
[2022-01-10 14:37:52,380 INFO  L275             CfgBuilder]: Performing block encoding
[2022-01-10 14:37:52,385 INFO  L294             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2022-01-10 14:37:52,385 INFO  L299             CfgBuilder]: Removed 2 assume(true) statements.
[2022-01-10 14:37:52,386 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 02:37:52 BoogieIcfgContainer
[2022-01-10 14:37:52,386 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2022-01-10 14:37:52,387 INFO  L113        PluginConnector]: ------------------------IcfgTransformer----------------------------
[2022-01-10 14:37:52,387 INFO  L271        PluginConnector]: Initializing IcfgTransformer...
[2022-01-10 14:37:52,389 INFO  L275        PluginConnector]: IcfgTransformer initialized
[2022-01-10 14:37:52,391 INFO  L185        PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 02:37:52" (1/1) ...
[2022-01-10 14:37:52,461 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 02:37:52 BasicIcfg
[2022-01-10 14:37:52,462 INFO  L132        PluginConnector]: ------------------------ END IcfgTransformer----------------------------
[2022-01-10 14:37:52,463 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2022-01-10 14:37:52,463 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2022-01-10 14:37:52,465 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2022-01-10 14:37:52,465 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 02:37:51" (1/4) ...
[2022-01-10 14:37:52,465 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17f4bc3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 02:37:52, skipping insertion in model container
[2022-01-10 14:37:52,465 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:37:51" (2/4) ...
[2022-01-10 14:37:52,466 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17f4bc3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 02:37:52, skipping insertion in model container
[2022-01-10 14:37:52,466 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 02:37:52" (3/4) ...
[2022-01-10 14:37:52,466 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17f4bc3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 02:37:52, skipping insertion in model container
[2022-01-10 14:37:52,466 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 02:37:52" (4/4) ...
[2022-01-10 14:37:52,467 INFO  L111   eAbstractionObserver]: Analyzing ICFG hard2.cTransformedIcfg
[2022-01-10 14:37:52,470 INFO  L204   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2022-01-10 14:37:52,470 INFO  L163   ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations.
[2022-01-10 14:37:52,513 INFO  L338      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2022-01-10 14:37:52,517 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 14:37:52,517 INFO  L340      AbstractCegarLoop]: Starting to check reachability of 7 error locations.
[2022-01-10 14:37:52,529 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 39 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 38 states have internal predecessors, (52), 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 14:37:52,532 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 6
[2022-01-10 14:37:52,532 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 14:37:52,532 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1]
[2022-01-10 14:37:52,533 INFO  L402      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] ===
[2022-01-10 14:37:52,537 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 14:37:52,537 INFO  L85        PathProgramCache]: Analyzing trace with hash 146042562, now seen corresponding path program 1 times
[2022-01-10 14:37:52,542 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 14:37:52,543 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227137489]
[2022-01-10 14:37:52,543 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 14:37:52,544 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 14:37:52,629 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 14:37:52,707 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 14:37:52,707 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 14:37:52,708 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227137489]
[2022-01-10 14:37:52,709 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227137489] provided 1 perfect and 0 imperfect interpolant sequences
[2022-01-10 14:37:52,709 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-01-10 14:37:52,709 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2022-01-10 14:37:52,710 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747973019]
[2022-01-10 14:37:52,712 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-10 14:37:52,715 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2022-01-10 14:37:52,715 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-10 14:37:52,736 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2022-01-10 14:37:52,737 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2022-01-10 14:37:52,739 INFO  L87              Difference]: Start difference. First operand  has 39 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 38 states have internal predecessors, (52), 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 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 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 14:37:52,842 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 14:37:52,842 INFO  L93              Difference]: Finished difference Result 98 states and 133 transitions.
[2022-01-10 14:37:52,843 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2022-01-10 14:37:52,844 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 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 5
[2022-01-10 14:37:52,845 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 14:37:52,850 INFO  L225             Difference]: With dead ends: 98
[2022-01-10 14:37:52,850 INFO  L226             Difference]: Without dead ends: 53
[2022-01-10 14:37:52,852 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2022-01-10 14:37:52,855 INFO  L933         BasicCegarLoop]: 34 mSDtfsCounter, 53 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-01-10 14:37:52,856 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 64 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-01-10 14:37:52,875 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 53 states.
[2022-01-10 14:37:52,888 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 33.
[2022-01-10 14:37:52,889 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 33 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 32 states have internal predecessors, (35), 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 14:37:52,890 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions.
[2022-01-10 14:37:52,891 INFO  L78                 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 5
[2022-01-10 14:37:52,891 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 14:37:52,891 INFO  L470      AbstractCegarLoop]: Abstraction has 33 states and 35 transitions.
[2022-01-10 14:37:52,892 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 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 14:37:52,892 INFO  L276                IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions.
[2022-01-10 14:37:52,892 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8
[2022-01-10 14:37:52,892 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 14:37:52,892 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1]
[2022-01-10 14:37:52,893 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2022-01-10 14:37:52,893 INFO  L402      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] ===
[2022-01-10 14:37:52,895 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 14:37:52,895 INFO  L85        PathProgramCache]: Analyzing trace with hash -1386982358, now seen corresponding path program 1 times
[2022-01-10 14:37:52,895 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 14:37:52,896 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060549329]
[2022-01-10 14:37:52,896 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 14:37:52,896 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 14:37:52,922 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 14:37:52,971 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 14:37:52,971 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 14:37:52,971 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060549329]
[2022-01-10 14:37:52,972 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060549329] provided 1 perfect and 0 imperfect interpolant sequences
[2022-01-10 14:37:52,972 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-01-10 14:37:52,972 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2022-01-10 14:37:52,972 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545296483]
[2022-01-10 14:37:52,972 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-10 14:37:52,973 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2022-01-10 14:37:52,973 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-10 14:37:52,973 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2022-01-10 14:37:52,974 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2022-01-10 14:37:52,974 INFO  L87              Difference]: Start difference. First operand 33 states and 35 transitions. Second operand  has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 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 14:37:53,085 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 14:37:53,085 INFO  L93              Difference]: Finished difference Result 53 states and 56 transitions.
[2022-01-10 14:37:53,085 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2022-01-10 14:37:53,086 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 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 14:37:53,086 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 14:37:53,086 INFO  L225             Difference]: With dead ends: 53
[2022-01-10 14:37:53,086 INFO  L226             Difference]: Without dead ends: 51
[2022-01-10 14:37:53,087 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2022-01-10 14:37:53,088 INFO  L933         BasicCegarLoop]: 26 mSDtfsCounter, 38 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-01-10 14:37:53,088 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 50 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-01-10 14:37:53,089 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 51 states.
[2022-01-10 14:37:53,091 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 31.
[2022-01-10 14:37:53,092 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 31 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 30 states have internal predecessors, (33), 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 14:37:53,092 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions.
[2022-01-10 14:37:53,092 INFO  L78                 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 7
[2022-01-10 14:37:53,092 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 14:37:53,092 INFO  L470      AbstractCegarLoop]: Abstraction has 31 states and 33 transitions.
[2022-01-10 14:37:53,093 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 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 14:37:53,093 INFO  L276                IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions.
[2022-01-10 14:37:53,093 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10
[2022-01-10 14:37:53,093 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 14:37:53,093 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 14:37:53,093 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2022-01-10 14:37:53,093 INFO  L402      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] ===
[2022-01-10 14:37:53,094 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 14:37:53,094 INFO  L85        PathProgramCache]: Analyzing trace with hash -1450147470, now seen corresponding path program 1 times
[2022-01-10 14:37:53,094 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 14:37:53,094 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779029338]
[2022-01-10 14:37:53,094 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 14:37:53,095 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 14:37:53,105 ERROR L247   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-01-10 14:37:53,106 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1354571969]
[2022-01-10 14:37:53,106 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 14:37:53,106 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-10 14:37:53,106 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-10 14:37:53,107 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 14:37:53,112 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 14:37:53,158 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 14:37:53,159 INFO  L263         TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 9 conjunts are in the unsatisfiable core
[2022-01-10 14:37:53,163 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 14:37:53,249 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 14:37:53,249 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2022-01-10 14:37:53,249 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 14:37:53,249 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779029338]
[2022-01-10 14:37:53,250 WARN  L312   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-01-10 14:37:53,250 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354571969]
[2022-01-10 14:37:53,250 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354571969] provided 1 perfect and 0 imperfect interpolant sequences
[2022-01-10 14:37:53,250 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-01-10 14:37:53,250 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2022-01-10 14:37:53,250 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924540465]
[2022-01-10 14:37:53,250 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-10 14:37:53,251 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2022-01-10 14:37:53,251 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-10 14:37:53,251 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2022-01-10 14:37:53,251 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2022-01-10 14:37:53,252 INFO  L87              Difference]: Start difference. First operand 31 states and 33 transitions. Second operand  has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 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 14:37:53,330 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 14:37:53,331 INFO  L93              Difference]: Finished difference Result 74 states and 80 transitions.
[2022-01-10 14:37:53,331 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2022-01-10 14:37:53,331 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 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) Word has length 9
[2022-01-10 14:37:53,331 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 14:37:53,333 INFO  L225             Difference]: With dead ends: 74
[2022-01-10 14:37:53,333 INFO  L226             Difference]: Without dead ends: 51
[2022-01-10 14:37:53,333 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2022-01-10 14:37:53,336 INFO  L933         BasicCegarLoop]: 24 mSDtfsCounter, 26 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-01-10 14:37:53,337 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 52 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-01-10 14:37:53,337 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 51 states.
[2022-01-10 14:37:53,346 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47.
[2022-01-10 14:37:53,347 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 47 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 46 states have internal predecessors, (51), 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 14:37:53,349 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions.
[2022-01-10 14:37:53,350 INFO  L78                 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 9
[2022-01-10 14:37:53,350 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 14:37:53,350 INFO  L470      AbstractCegarLoop]: Abstraction has 47 states and 51 transitions.
[2022-01-10 14:37:53,350 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 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 14:37:53,350 INFO  L276                IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions.
[2022-01-10 14:37:53,350 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 14
[2022-01-10 14:37:53,350 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 14:37:53,351 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 14:37:53,367 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0
[2022-01-10 14:37:53,559 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-10 14:37:53,560 INFO  L402      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] ===
[2022-01-10 14:37:53,560 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 14:37:53,560 INFO  L85        PathProgramCache]: Analyzing trace with hash -2083542864, now seen corresponding path program 1 times
[2022-01-10 14:37:53,560 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 14:37:53,560 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938599799]
[2022-01-10 14:37:53,561 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 14:37:53,561 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 14:37:53,578 ERROR L247   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-01-10 14:37:53,579 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1163731200]
[2022-01-10 14:37:53,579 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 14:37:53,579 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-10 14:37:53,579 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-10 14:37:53,585 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 14:37:53,587 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 14:37:53,640 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 14:37:53,641 INFO  L263         TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 9 conjunts are in the unsatisfiable core
[2022-01-10 14:37:53,642 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 14:37:53,864 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 14:37:53,864 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2022-01-10 14:37:53,864 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 14:37:53,866 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938599799]
[2022-01-10 14:37:53,866 WARN  L312   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-01-10 14:37:53,866 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163731200]
[2022-01-10 14:37:53,871 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163731200] provided 1 perfect and 0 imperfect interpolant sequences
[2022-01-10 14:37:53,873 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-01-10 14:37:53,873 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2022-01-10 14:37:53,873 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082183836]
[2022-01-10 14:37:53,874 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-10 14:37:53,874 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2022-01-10 14:37:53,874 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-10 14:37:53,874 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2022-01-10 14:37:53,875 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2022-01-10 14:37:53,875 INFO  L87              Difference]: Start difference. First operand 47 states and 51 transitions. Second operand  has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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 14:37:53,943 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 14:37:53,944 INFO  L93              Difference]: Finished difference Result 66 states and 71 transitions.
[2022-01-10 14:37:53,944 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2022-01-10 14:37:53,944 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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 14:37:53,945 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 14:37:53,945 INFO  L225             Difference]: With dead ends: 66
[2022-01-10 14:37:53,945 INFO  L226             Difference]: Without dead ends: 54
[2022-01-10 14:37:53,946 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2022-01-10 14:37:53,946 INFO  L933         BasicCegarLoop]: 21 mSDtfsCounter, 32 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-01-10 14:37:53,947 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 45 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-01-10 14:37:53,947 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 54 states.
[2022-01-10 14:37:53,951 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48.
[2022-01-10 14:37:53,951 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 48 states, 43 states have (on average 1.2325581395348837) internal successors, (53), 47 states have internal predecessors, (53), 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 14:37:53,951 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions.
[2022-01-10 14:37:53,951 INFO  L78                 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 13
[2022-01-10 14:37:53,951 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 14:37:53,952 INFO  L470      AbstractCegarLoop]: Abstraction has 48 states and 53 transitions.
[2022-01-10 14:37:53,952 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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 14:37:53,952 INFO  L276                IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions.
[2022-01-10 14:37:53,952 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 18
[2022-01-10 14:37:53,952 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 14:37:53,952 INFO  L514         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 14:37:53,961 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0
[2022-01-10 14:37:54,156 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,SelfDestructingSolverStorable3
[2022-01-10 14:37:54,158 INFO  L402      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] ===
[2022-01-10 14:37:54,159 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 14:37:54,159 INFO  L85        PathProgramCache]: Analyzing trace with hash 323653658, now seen corresponding path program 1 times
[2022-01-10 14:37:54,159 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 14:37:54,159 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522541736]
[2022-01-10 14:37:54,159 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 14:37:54,159 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 14:37:54,168 ERROR L247   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-01-10 14:37:54,168 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1147504388]
[2022-01-10 14:37:54,168 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 14:37:54,168 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-10 14:37:54,168 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-10 14:37:54,169 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 14:37:54,170 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 14:37:54,220 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 14:37:54,223 INFO  L263         TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 15 conjunts are in the unsatisfiable core
[2022-01-10 14:37:54,225 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 14:37:54,363 INFO  L134       CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 14:37:54,363 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-01-10 14:37:54,453 INFO  L134       CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 14:37:54,453 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 14:37:54,453 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522541736]
[2022-01-10 14:37:54,453 WARN  L312   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-01-10 14:37:54,453 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147504388]
[2022-01-10 14:37:54,454 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147504388] provided 0 perfect and 2 imperfect interpolant sequences
[2022-01-10 14:37:54,454 INFO  L186   FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2022-01-10 14:37:54,454 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7
[2022-01-10 14:37:54,454 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033512285]
[2022-01-10 14:37:54,454 INFO  L85    oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2022-01-10 14:37:54,454 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2022-01-10 14:37:54,454 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-10 14:37:54,455 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2022-01-10 14:37:54,455 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42
[2022-01-10 14:37:54,455 INFO  L87              Difference]: Start difference. First operand 48 states and 53 transitions. Second operand  has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 14:37:56,604 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 14:37:56,757 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 14:37:56,757 INFO  L93              Difference]: Finished difference Result 125 states and 144 transitions.
[2022-01-10 14:37:56,758 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2022-01-10 14:37:56,758 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17
[2022-01-10 14:37:56,758 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 14:37:56,758 INFO  L225             Difference]: With dead ends: 125
[2022-01-10 14:37:56,759 INFO  L226             Difference]: Without dead ends: 85
[2022-01-10 14:37:56,759 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90
[2022-01-10 14:37:56,759 INFO  L933         BasicCegarLoop]: 25 mSDtfsCounter, 58 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 49 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time
[2022-01-10 14:37:56,760 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 89 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 76 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time]
[2022-01-10 14:37:56,760 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 85 states.
[2022-01-10 14:37:56,765 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 73.
[2022-01-10 14:37:56,766 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 73 states, 69 states have (on average 1.1594202898550725) internal successors, (80), 72 states have internal predecessors, (80), 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 14:37:56,766 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 80 transitions.
[2022-01-10 14:37:56,766 INFO  L78                 Accepts]: Start accepts. Automaton has 73 states and 80 transitions. Word has length 17
[2022-01-10 14:37:56,766 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 14:37:56,767 INFO  L470      AbstractCegarLoop]: Abstraction has 73 states and 80 transitions.
[2022-01-10 14:37:56,767 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 14:37:56,767 INFO  L276                IsEmpty]: Start isEmpty. Operand 73 states and 80 transitions.
[2022-01-10 14:37:56,767 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 29
[2022-01-10 14:37:56,767 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 14:37:56,767 INFO  L514         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 14:37:56,786 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 14:37:56,976 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-10 14:37:56,977 INFO  L402      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] ===
[2022-01-10 14:37:56,977 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 14:37:56,978 INFO  L85        PathProgramCache]: Analyzing trace with hash -249068893, now seen corresponding path program 1 times
[2022-01-10 14:37:56,978 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 14:37:56,978 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104251538]
[2022-01-10 14:37:56,978 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 14:37:56,978 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 14:37:56,988 ERROR L247   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-01-10 14:37:56,988 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1397998733]
[2022-01-10 14:37:56,988 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 14:37:56,988 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-10 14:37:56,988 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-10 14:37:56,989 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 14:37:56,990 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 14:37:57,118 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 14:37:57,120 INFO  L263         TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 35 conjunts are in the unsatisfiable core
[2022-01-10 14:37:57,122 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 14:38:19,361 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 14:38:19,361 INFO  L328         TraceCheckSpWp]: Computing backward predicates...