/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInlineTransformed.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_NONE.epf -i ../../../trunk/examples/svcomp/ldv-regression/test25-1.c


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


This is Ultimate 0.2.2-dev-a10ec3b
[2022-01-10 23:32:31,085 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2022-01-10 23:32:31,087 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2022-01-10 23:32:31,137 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2022-01-10 23:32:31,137 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2022-01-10 23:32:31,142 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2022-01-10 23:32:31,144 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
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[2022-01-10 23:32:31,151 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
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[2022-01-10 23:32:31,153 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2022-01-10 23:32:31,154 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2022-01-10 23:32:31,155 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2022-01-10 23:32:31,157 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2022-01-10 23:32:31,159 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2022-01-10 23:32:31,160 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2022-01-10 23:32:31,162 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2022-01-10 23:32:31,166 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2022-01-10 23:32:31,167 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2022-01-10 23:32:31,168 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2022-01-10 23:32:31,169 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2022-01-10 23:32:31,170 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2022-01-10 23:32:31,175 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2022-01-10 23:32:31,175 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2022-01-10 23:32:31,175 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2022-01-10 23:32:31,176 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2022-01-10 23:32:31,177 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2022-01-10 23:32:31,177 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2022-01-10 23:32:31,178 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2022-01-10 23:32:31,178 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2022-01-10 23:32:31,179 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2022-01-10 23:32:31,180 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2022-01-10 23:32:31,181 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2022-01-10 23:32:31,181 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2022-01-10 23:32:31,181 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2022-01-10 23:32:31,182 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2022-01-10 23:32:31,182 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2022-01-10 23:32:31,183 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2022-01-10 23:32:31,184 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_NONE.epf
[2022-01-10 23:32:31,209 INFO  L113        SettingsManager]: Loading preferences was successful
[2022-01-10 23:32:31,209 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2022-01-10 23:32:31,209 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2022-01-10 23:32:31,209 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2022-01-10 23:32:31,210 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2022-01-10 23:32:31,210 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2022-01-10 23:32:31,210 INFO  L138        SettingsManager]:  * Use SBE=true
[2022-01-10 23:32:31,210 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2022-01-10 23:32:31,211 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2022-01-10 23:32:31,211 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2022-01-10 23:32:31,211 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2022-01-10 23:32:31,211 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2022-01-10 23:32:31,212 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2022-01-10 23:32:31,212 INFO  L138        SettingsManager]:  * Adapt memory model on pointer casts if necessary=true
[2022-01-10 23:32:31,212 INFO  L138        SettingsManager]:  * Use bitvectors instead of ints=true
[2022-01-10 23:32:31,212 INFO  L138        SettingsManager]:  * Memory model=HoenickeLindenmann_4ByteResolution
[2022-01-10 23:32:31,212 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2022-01-10 23:32:31,212 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2022-01-10 23:32:31,212 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2022-01-10 23:32:31,212 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2022-01-10 23:32:31,212 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2022-01-10 23:32:31,212 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-01-10 23:32:31,213 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2022-01-10 23:32:31,213 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2022-01-10 23:32:31,213 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2022-01-10 23:32:31,213 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2022-01-10 23:32:31,213 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2022-01-10 23:32:31,213 INFO  L138        SettingsManager]:  * Large block encoding in concurrent analysis=OFF
[2022-01-10 23:32:31,213 INFO  L138        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2022-01-10 23:32:31,213 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2022-01-10 23:32:31,213 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2022-01-10 23:32:31,214 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2022-01-10 23:32:31,214 INFO  L136        SettingsManager]: Preferences of IcfgTransformer differ from their defaults:
[2022-01-10 23:32:31,214 INFO  L138        SettingsManager]:  * TransformationType=BV_TO_INT_NONE
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int)
WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN;
[2022-01-10 23:32:31,406 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2022-01-10 23:32:31,428 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2022-01-10 23:32:31,430 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2022-01-10 23:32:31,431 INFO  L271        PluginConnector]: Initializing CDTParser...
[2022-01-10 23:32:31,431 INFO  L275        PluginConnector]: CDTParser initialized
[2022-01-10 23:32:31,432 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test25-1.c
[2022-01-10 23:32:31,488 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe1e152d1/510b77dea2534f4aa492dbce5d47ed7b/FLAG69c167fc2
[2022-01-10 23:32:31,854 INFO  L306              CDTParser]: Found 1 translation units.
[2022-01-10 23:32:31,855 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test25-1.c
[2022-01-10 23:32:31,859 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe1e152d1/510b77dea2534f4aa492dbce5d47ed7b/FLAG69c167fc2
[2022-01-10 23:32:31,881 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe1e152d1/510b77dea2534f4aa492dbce5d47ed7b
[2022-01-10 23:32:31,883 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2022-01-10 23:32:31,884 INFO  L131        ToolchainWalker]: Walking toolchain with 6 elements.
[2022-01-10 23:32:31,885 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2022-01-10 23:32:31,885 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2022-01-10 23:32:31,888 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2022-01-10 23:32:31,888 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 11:32:31" (1/1) ...
[2022-01-10 23:32:31,889 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16967371 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:32:31, skipping insertion in model container
[2022-01-10 23:32:31,889 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 11:32:31" (1/1) ...
[2022-01-10 23:32:31,893 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2022-01-10 23:32:31,902 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2022-01-10 23:32:32,074 WARN  L230   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test25-1.c[936,949]
[2022-01-10 23:32:32,076 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-01-10 23:32:32,085 INFO  L203         MainTranslator]: Completed pre-run
[2022-01-10 23:32:32,106 WARN  L230   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test25-1.c[936,949]
[2022-01-10 23:32:32,111 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-01-10 23:32:32,124 INFO  L208         MainTranslator]: Completed translation
[2022-01-10 23:32:32,124 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:32:32 WrapperNode
[2022-01-10 23:32:32,124 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2022-01-10 23:32:32,125 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2022-01-10 23:32:32,125 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2022-01-10 23:32:32,126 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2022-01-10 23:32:32,130 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:32:32" (1/1) ...
[2022-01-10 23:32:32,143 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:32:32" (1/1) ...
[2022-01-10 23:32:32,162 INFO  L137                Inliner]: procedures = 18, calls = 26, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 85
[2022-01-10 23:32:32,163 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2022-01-10 23:32:32,163 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2022-01-10 23:32:32,163 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2022-01-10 23:32:32,164 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2022-01-10 23:32:32,169 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:32:32" (1/1) ...
[2022-01-10 23:32:32,169 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:32:32" (1/1) ...
[2022-01-10 23:32:32,174 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:32:32" (1/1) ...
[2022-01-10 23:32:32,174 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:32:32" (1/1) ...
[2022-01-10 23:32:32,187 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:32:32" (1/1) ...
[2022-01-10 23:32:32,190 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:32:32" (1/1) ...
[2022-01-10 23:32:32,196 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:32:32" (1/1) ...
[2022-01-10 23:32:32,199 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2022-01-10 23:32:32,200 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2022-01-10 23:32:32,200 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2022-01-10 23:32:32,200 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2022-01-10 23:32:32,201 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:32:32" (1/1) ...
[2022-01-10 23:32:32,206 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-01-10 23:32:32,220 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-10 23:32:32,240 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 23:32:32,260 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 23:32:32,274 INFO  L130     BoogieDeclarations]: Found specification of procedure read~$Pointer$
[2022-01-10 23:32:32,275 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2022-01-10 23:32:32,275 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1
[2022-01-10 23:32:32,275 INFO  L130     BoogieDeclarations]: Found specification of procedure write~$Pointer$
[2022-01-10 23:32:32,275 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2022-01-10 23:32:32,275 INFO  L130     BoogieDeclarations]: Found specification of procedure read~intINTTYPE4
[2022-01-10 23:32:32,275 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2022-01-10 23:32:32,275 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2022-01-10 23:32:32,275 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2022-01-10 23:32:32,275 INFO  L130     BoogieDeclarations]: Found specification of procedure write~intINTTYPE4
[2022-01-10 23:32:32,342 INFO  L234             CfgBuilder]: Building ICFG
[2022-01-10 23:32:32,343 INFO  L260             CfgBuilder]: Building CFG for each procedure with an implementation
[2022-01-10 23:32:32,475 INFO  L275             CfgBuilder]: Performing block encoding
[2022-01-10 23:32:32,479 INFO  L294             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2022-01-10 23:32:32,479 INFO  L299             CfgBuilder]: Removed 2 assume(true) statements.
[2022-01-10 23:32:32,480 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 11:32:32 BoogieIcfgContainer
[2022-01-10 23:32:32,480 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2022-01-10 23:32:32,481 INFO  L113        PluginConnector]: ------------------------IcfgTransformer----------------------------
[2022-01-10 23:32:32,481 INFO  L271        PluginConnector]: Initializing IcfgTransformer...
[2022-01-10 23:32:32,482 INFO  L275        PluginConnector]: IcfgTransformer initialized
[2022-01-10 23:32:32,483 INFO  L185        PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 11:32:32" (1/1) ...
[2022-01-10 23:32:32,601 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 11:32:32 BasicIcfg
[2022-01-10 23:32:32,602 INFO  L132        PluginConnector]: ------------------------ END IcfgTransformer----------------------------
[2022-01-10 23:32:32,615 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2022-01-10 23:32:32,615 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2022-01-10 23:32:32,617 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2022-01-10 23:32:32,618 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 11:32:31" (1/4) ...
[2022-01-10 23:32:32,618 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27cf766c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 11:32:32, skipping insertion in model container
[2022-01-10 23:32:32,618 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:32:32" (2/4) ...
[2022-01-10 23:32:32,618 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27cf766c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 11:32:32, skipping insertion in model container
[2022-01-10 23:32:32,618 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 11:32:32" (3/4) ...
[2022-01-10 23:32:32,619 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27cf766c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 11:32:32, skipping insertion in model container
[2022-01-10 23:32:32,619 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 11:32:32" (4/4) ...
[2022-01-10 23:32:32,619 INFO  L111   eAbstractionObserver]: Analyzing ICFG test25-1.cTransformedIcfg
[2022-01-10 23:32:32,623 INFO  L204   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2022-01-10 23:32:32,624 INFO  L163   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2022-01-10 23:32:32,656 INFO  L338      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2022-01-10 23:32:32,663 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 23:32:32,663 INFO  L340      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2022-01-10 23:32:32,673 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 17 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 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 23:32:32,677 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 11
[2022-01-10 23:32:32,677 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 23:32:32,677 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 23:32:32,678 INFO  L402      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 23:32:32,682 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 23:32:32,682 INFO  L85        PathProgramCache]: Analyzing trace with hash -1659260562, now seen corresponding path program 1 times
[2022-01-10 23:32:32,688 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 23:32:32,688 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616157084]
[2022-01-10 23:32:32,688 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 23:32:32,689 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 23:32:32,770 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 23:32:32,806 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 23:32:32,807 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 23:32:32,807 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616157084]
[2022-01-10 23:32:32,808 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616157084] provided 1 perfect and 0 imperfect interpolant sequences
[2022-01-10 23:32:32,808 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-01-10 23:32:32,809 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2022-01-10 23:32:32,811 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573778112]
[2022-01-10 23:32:32,813 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-10 23:32:32,816 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 2 states
[2022-01-10 23:32:32,816 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-10 23:32:32,838 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2022-01-10 23:32:32,839 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2022-01-10 23:32:32,840 INFO  L87              Difference]: Start difference. First operand  has 17 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand  has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 23:32:32,850 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 23:32:32,851 INFO  L93              Difference]: Finished difference Result 30 states and 40 transitions.
[2022-01-10 23:32:32,851 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. 
[2022-01-10 23:32:32,852 INFO  L78                 Accepts]: Start accepts. Automaton has  has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10
[2022-01-10 23:32:32,853 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 23:32:32,857 INFO  L225             Difference]: With dead ends: 30
[2022-01-10 23:32:32,858 INFO  L226             Difference]: Without dead ends: 13
[2022-01-10 23:32:32,860 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 23:32:32,862 INFO  L933         BasicCegarLoop]: 20 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, 20 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 23:32:32,863 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-01-10 23:32:32,874 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 13 states.
[2022-01-10 23:32:32,881 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13.
[2022-01-10 23:32:32,883 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 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 23:32:32,883 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions.
[2022-01-10 23:32:32,884 INFO  L78                 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10
[2022-01-10 23:32:32,885 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 23:32:32,885 INFO  L470      AbstractCegarLoop]: Abstraction has 13 states and 14 transitions.
[2022-01-10 23:32:32,885 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 23:32:32,886 INFO  L276                IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions.
[2022-01-10 23:32:32,887 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 12
[2022-01-10 23:32:32,887 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 23:32:32,887 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 23:32:32,887 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2022-01-10 23:32:32,887 INFO  L402      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 23:32:32,888 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 23:32:32,888 INFO  L85        PathProgramCache]: Analyzing trace with hash -1675491771, now seen corresponding path program 1 times
[2022-01-10 23:32:32,888 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 23:32:32,888 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087034301]
[2022-01-10 23:32:32,888 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 23:32:32,889 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 23:32:32,983 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 23:32:33,057 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 23:32:33,058 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 23:32:33,058 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087034301]
[2022-01-10 23:32:33,058 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087034301] provided 1 perfect and 0 imperfect interpolant sequences
[2022-01-10 23:32:33,058 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-01-10 23:32:33,059 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2022-01-10 23:32:33,059 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168798404]
[2022-01-10 23:32:33,059 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-10 23:32:33,060 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-01-10 23:32:33,060 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-10 23:32:33,061 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-01-10 23:32:33,061 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-01-10 23:32:33,061 INFO  L87              Difference]: Start difference. First operand 13 states and 14 transitions. Second operand  has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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 23:32:33,098 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 23:32:33,098 INFO  L93              Difference]: Finished difference Result 24 states and 26 transitions.
[2022-01-10 23:32:33,099 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-01-10 23:32:33,100 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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 11
[2022-01-10 23:32:33,100 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 23:32:33,100 INFO  L225             Difference]: With dead ends: 24
[2022-01-10 23:32:33,100 INFO  L226             Difference]: Without dead ends: 15
[2022-01-10 23:32:33,101 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 23:32:33,102 INFO  L933         BasicCegarLoop]: 12 mSDtfsCounter, 1 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-01-10 23:32:33,103 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 22 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-01-10 23:32:33,103 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 15 states.
[2022-01-10 23:32:33,106 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14.
[2022-01-10 23:32:33,106 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 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 23:32:33,107 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions.
[2022-01-10 23:32:33,108 INFO  L78                 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11
[2022-01-10 23:32:33,108 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 23:32:33,110 INFO  L470      AbstractCegarLoop]: Abstraction has 14 states and 15 transitions.
[2022-01-10 23:32:33,110 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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 23:32:33,110 INFO  L276                IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions.
[2022-01-10 23:32:33,110 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 14
[2022-01-10 23:32:33,111 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 23:32:33,111 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 23:32:33,111 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2022-01-10 23:32:33,111 INFO  L402      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 23:32:33,111 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 23:32:33,111 INFO  L85        PathProgramCache]: Analyzing trace with hash 1724963490, now seen corresponding path program 1 times
[2022-01-10 23:32:33,112 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 23:32:33,112 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216369064]
[2022-01-10 23:32:33,112 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 23:32:33,112 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 23:32:33,206 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 23:32:33,263 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 23:32:33,263 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 23:32:33,263 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216369064]
[2022-01-10 23:32:33,264 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216369064] provided 0 perfect and 1 imperfect interpolant sequences
[2022-01-10 23:32:33,265 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895968349]
[2022-01-10 23:32:33,265 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 23:32:33,265 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-10 23:32:33,265 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-10 23:32:33,266 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 23:32:33,267 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 23:32:33,576 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 23:32:33,579 INFO  L263         TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 7 conjunts are in the unsatisfiable core
[2022-01-10 23:32:33,582 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 23:32:33,711 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 23:32:33,711 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-01-10 23:32:33,749 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 23:32:33,749 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [895968349] provided 0 perfect and 2 imperfect interpolant sequences
[2022-01-10 23:32:33,749 INFO  L186   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-01-10 23:32:33,749 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7
[2022-01-10 23:32:33,749 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953881432]
[2022-01-10 23:32:33,750 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-01-10 23:32:33,750 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2022-01-10 23:32:33,750 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-10 23:32:33,750 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2022-01-10 23:32:33,750 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42
[2022-01-10 23:32:33,751 INFO  L87              Difference]: Start difference. First operand 14 states and 15 transitions. Second operand  has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 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 23:32:33,852 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 23:32:33,852 INFO  L93              Difference]: Finished difference Result 29 states and 33 transitions.
[2022-01-10 23:32:33,853 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2022-01-10 23:32:33,853 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 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 23:32:33,853 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 23:32:33,853 INFO  L225             Difference]: With dead ends: 29
[2022-01-10 23:32:33,854 INFO  L226             Difference]: Without dead ends: 20
[2022-01-10 23:32:33,854 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56
[2022-01-10 23:32:33,855 INFO  L933         BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-01-10 23:32:33,855 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 32 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-01-10 23:32:33,855 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 20 states.
[2022-01-10 23:32:33,858 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20.
[2022-01-10 23:32:33,858 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 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 23:32:33,858 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions.
[2022-01-10 23:32:33,859 INFO  L78                 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 13
[2022-01-10 23:32:33,859 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 23:32:33,859 INFO  L470      AbstractCegarLoop]: Abstraction has 20 states and 21 transitions.
[2022-01-10 23:32:33,859 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 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 23:32:33,859 INFO  L276                IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions.
[2022-01-10 23:32:33,859 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 20
[2022-01-10 23:32:33,859 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 23:32:33,860 INFO  L514         BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 23:32:33,867 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 23:32:34,064 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 23:32:34,065 INFO  L402      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 23:32:34,065 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 23:32:34,065 INFO  L85        PathProgramCache]: Analyzing trace with hash 641909817, now seen corresponding path program 2 times
[2022-01-10 23:32:34,065 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 23:32:34,066 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209466470]
[2022-01-10 23:32:34,066 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 23:32:34,066 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 23:32:34,167 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 23:32:34,286 INFO  L134       CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 23:32:34,287 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 23:32:34,287 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209466470]
[2022-01-10 23:32:34,287 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209466470] provided 0 perfect and 1 imperfect interpolant sequences
[2022-01-10 23:32:34,287 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714844903]
[2022-01-10 23:32:34,287 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2022-01-10 23:32:34,287 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-10 23:32:34,287 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-10 23:32:34,288 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 23:32:34,308 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 23:32:34,523 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s)
[2022-01-10 23:32:34,524 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-01-10 23:32:34,526 INFO  L263         TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 33 conjunts are in the unsatisfiable core
[2022-01-10 23:32:34,530 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 23:32:35,319 INFO  L173   IndexEqualityManager]: detected equality via solver
[2022-01-10 23:32:35,324 INFO  L353             Elim1Store]: treesize reduction 0, result has 100.0 percent of original size
[2022-01-10 23:32:35,326 INFO  L387             Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 142 treesize of output 27
[2022-01-10 23:32:35,458 INFO  L134       CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked.
[2022-01-10 23:32:35,458 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2022-01-10 23:32:35,461 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [714844903] provided 1 perfect and 0 imperfect interpolant sequences
[2022-01-10 23:32:35,462 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2022-01-10 23:32:35,462 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11
[2022-01-10 23:32:35,462 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685685162]
[2022-01-10 23:32:35,462 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-10 23:32:35,462 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2022-01-10 23:32:35,462 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-10 23:32:35,463 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2022-01-10 23:32:35,464 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110
[2022-01-10 23:32:35,464 INFO  L87              Difference]: Start difference. First operand 20 states and 21 transitions. Second operand  has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 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 23:32:35,556 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 23:32:35,556 INFO  L93              Difference]: Finished difference Result 27 states and 28 transitions.
[2022-01-10 23:32:35,558 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2022-01-10 23:32:35,559 INFO  L78                 Accepts]: Start accepts. Automaton has  has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 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 19
[2022-01-10 23:32:35,560 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 23:32:35,560 INFO  L225             Difference]: With dead ends: 27
[2022-01-10 23:32:35,560 INFO  L226             Difference]: Without dead ends: 22
[2022-01-10 23:32:35,560 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132
[2022-01-10 23:32:35,561 INFO  L933         BasicCegarLoop]: 9 mSDtfsCounter, 1 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-01-10 23:32:35,561 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 28 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 8 Unchecked, 0.0s Time]
[2022-01-10 23:32:35,561 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 22 states.
[2022-01-10 23:32:35,563 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22.
[2022-01-10 23:32:35,564 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 22 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 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 23:32:35,564 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions.
[2022-01-10 23:32:35,564 INFO  L78                 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 19
[2022-01-10 23:32:35,564 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 23:32:35,564 INFO  L470      AbstractCegarLoop]: Abstraction has 22 states and 23 transitions.
[2022-01-10 23:32:35,564 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 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 23:32:35,564 INFO  L276                IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions.
[2022-01-10 23:32:35,565 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2022-01-10 23:32:35,565 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 23:32:35,565 INFO  L514         BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 23:32:35,578 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 23:32:35,771 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 23:32:35,772 INFO  L402      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 23:32:35,772 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 23:32:35,772 INFO  L85        PathProgramCache]: Analyzing trace with hash -772631107, now seen corresponding path program 1 times
[2022-01-10 23:32:35,772 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 23:32:35,772 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644997665]
[2022-01-10 23:32:35,772 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 23:32:35,772 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 23:32:35,842 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 23:32:35,913 INFO  L134       CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2022-01-10 23:32:35,914 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 23:32:35,914 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644997665]
[2022-01-10 23:32:35,914 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644997665] provided 0 perfect and 1 imperfect interpolant sequences
[2022-01-10 23:32:35,914 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558326646]
[2022-01-10 23:32:35,914 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 23:32:35,914 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-10 23:32:35,914 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-10 23:32:35,915 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 23:32:35,916 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 23:32:37,269 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 23:32:37,272 INFO  L263         TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 19 conjunts are in the unsatisfiable core
[2022-01-10 23:32:37,273 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 23:32:38,166 INFO  L134       CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2022-01-10 23:32:38,166 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-01-10 23:32:39,355 INFO  L134       CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2022-01-10 23:32:39,355 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558326646] provided 0 perfect and 2 imperfect interpolant sequences
[2022-01-10 23:32:39,355 INFO  L186   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-01-10 23:32:39,356 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 17
[2022-01-10 23:32:39,356 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626467683]
[2022-01-10 23:32:39,356 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-01-10 23:32:39,356 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 17 states
[2022-01-10 23:32:39,356 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-10 23:32:39,356 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants.
[2022-01-10 23:32:39,357 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272
[2022-01-10 23:32:39,357 INFO  L87              Difference]: Start difference. First operand 22 states and 23 transitions. Second operand  has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 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 23:32:45,334 WARN  L228               SmtUtils]: Spent 5.46s on a formula simplification that was a NOOP. DAG size: 37 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)
[2022-01-10 23:32:57,698 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 23:32:57,702 INFO  L93              Difference]: Finished difference Result 43 states and 49 transitions.
[2022-01-10 23:32:57,703 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. 
[2022-01-10 23:32:57,703 INFO  L78                 Accepts]: Start accepts. Automaton has  has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 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 21
[2022-01-10 23:32:57,703 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 23:32:57,704 INFO  L225             Difference]: With dead ends: 43
[2022-01-10 23:32:57,704 INFO  L226             Difference]: Without dead ends: 32
[2022-01-10 23:32:57,704 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 19.2s TimeCoverageRelationStatistics Valid=165, Invalid=340, Unknown=1, NotChecked=0, Total=506
[2022-01-10 23:32:57,704 INFO  L933         BasicCegarLoop]: 12 mSDtfsCounter, 14 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time
[2022-01-10 23:32:57,705 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 122 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 42 Invalid, 0 Unknown, 22 Unchecked, 0.4s Time]
[2022-01-10 23:32:57,705 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 32 states.
[2022-01-10 23:32:57,709 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32.
[2022-01-10 23:32:57,709 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 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 23:32:57,709 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions.
[2022-01-10 23:32:57,710 INFO  L78                 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 21
[2022-01-10 23:32:57,710 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 23:32:57,710 INFO  L470      AbstractCegarLoop]: Abstraction has 32 states and 33 transitions.
[2022-01-10 23:32:57,710 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 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 23:32:57,710 INFO  L276                IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions.
[2022-01-10 23:32:57,710 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 32
[2022-01-10 23:32:57,710 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 23:32:57,710 INFO  L514         BasicCegarLoop]: trace histogram [9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 23:32:57,720 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 23:32:57,918 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 23:32:57,919 INFO  L402      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 23:32:57,919 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 23:32:57,919 INFO  L85        PathProgramCache]: Analyzing trace with hash -2129868338, now seen corresponding path program 2 times
[2022-01-10 23:32:57,919 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 23:32:57,919 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524755196]
[2022-01-10 23:32:57,920 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 23:32:57,920 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 23:32:58,033 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 23:32:58,188 INFO  L134       CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2022-01-10 23:32:58,188 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 23:32:58,188 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524755196]
[2022-01-10 23:32:58,189 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524755196] provided 0 perfect and 1 imperfect interpolant sequences
[2022-01-10 23:32:58,189 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870534061]
[2022-01-10 23:32:58,189 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2022-01-10 23:32:58,189 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-10 23:32:58,189 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-10 23:32:58,192 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 23:32:58,193 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 23:33:15,238 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2022-01-10 23:33:15,238 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-01-10 23:33:15,256 INFO  L263         TraceCheckSpWp]: Trace formula consists of 657 conjuncts, 40 conjunts are in the unsatisfiable core
[2022-01-10 23:33:15,258 INFO  L286         TraceCheckSpWp]: Computing forward predicates...