/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/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound5.c


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


This is Ultimate 0.2.2-dev-a10ec3b
[2022-01-10 03:04:16,934 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2022-01-10 03:04:16,936 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2022-01-10 03:04:16,954 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2022-01-10 03:04:16,955 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2022-01-10 03:04:16,987 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2022-01-10 03:04:16,989 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2022-01-10 03:04:16,990 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2022-01-10 03:04:16,990 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2022-01-10 03:04:16,991 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
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[2022-01-10 03:04:16,992 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2022-01-10 03:04:16,992 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2022-01-10 03:04:16,993 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2022-01-10 03:04:16,994 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2022-01-10 03:04:16,995 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2022-01-10 03:04:16,996 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2022-01-10 03:04:16,996 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2022-01-10 03:04:16,997 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2022-01-10 03:04:16,998 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2022-01-10 03:04:16,999 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2022-01-10 03:04:17,002 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2022-01-10 03:04:17,002 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2022-01-10 03:04:17,003 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2022-01-10 03:04:17,004 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2022-01-10 03:04:17,004 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2022-01-10 03:04:17,005 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2022-01-10 03:04:17,005 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2022-01-10 03:04:17,005 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2022-01-10 03:04:17,006 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2022-01-10 03:04:17,006 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2022-01-10 03:04:17,007 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2022-01-10 03:04:17,007 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2022-01-10 03:04:17,007 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2022-01-10 03:04:17,008 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2022-01-10 03:04:17,008 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2022-01-10 03:04:17,009 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2022-01-10 03:04:17,009 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2022-01-10 03:04:17,009 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2022-01-10 03:04:17,010 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2022-01-10 03:04:17,010 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2022-01-10 03:04:17,017 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf
[2022-01-10 03:04:17,048 INFO  L113        SettingsManager]: Loading preferences was successful
[2022-01-10 03:04:17,048 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2022-01-10 03:04:17,048 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2022-01-10 03:04:17,048 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2022-01-10 03:04:17,049 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2022-01-10 03:04:17,049 INFO  L138        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2022-01-10 03:04:17,049 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2022-01-10 03:04:17,049 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2022-01-10 03:04:17,049 INFO  L138        SettingsManager]:  * Use SBE=true
[2022-01-10 03:04:17,050 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2022-01-10 03:04:17,050 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2022-01-10 03:04:17,050 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2022-01-10 03:04:17,050 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2022-01-10 03:04:17,050 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2022-01-10 03:04:17,050 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2022-01-10 03:04:17,050 INFO  L138        SettingsManager]:  * Adapt memory model on pointer casts if necessary=true
[2022-01-10 03:04:17,050 INFO  L138        SettingsManager]:  * Use bitvectors instead of ints=true
[2022-01-10 03:04:17,050 INFO  L138        SettingsManager]:  * Memory model=HoenickeLindenmann_4ByteResolution
[2022-01-10 03:04:17,050 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2022-01-10 03:04:17,050 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2022-01-10 03:04:17,050 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2022-01-10 03:04:17,051 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2022-01-10 03:04:17,051 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2022-01-10 03:04:17,051 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-01-10 03:04:17,051 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2022-01-10 03:04:17,051 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2022-01-10 03:04:17,051 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2022-01-10 03:04:17,051 INFO  L138        SettingsManager]:  * Trace refinement strategy=WOLF
[2022-01-10 03:04:17,051 INFO  L138        SettingsManager]:  * Command for external solver=cvc4 --incremental --print-success --lang smt 
[2022-01-10 03:04:17,051 INFO  L138        SettingsManager]:  * Large block encoding in concurrent analysis=OFF
[2022-01-10 03:04:17,051 INFO  L138        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2022-01-10 03:04:17,051 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2022-01-10 03:04:17,052 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2022-01-10 03:04:17,052 INFO  L138        SettingsManager]:  * Logic for external solver=AUFBV
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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN;
[2022-01-10 03:04:17,207 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2022-01-10 03:04:17,220 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2022-01-10 03:04:17,222 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2022-01-10 03:04:17,223 INFO  L271        PluginConnector]: Initializing CDTParser...
[2022-01-10 03:04:17,223 INFO  L275        PluginConnector]: CDTParser initialized
[2022-01-10 03:04:17,224 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound5.c
[2022-01-10 03:04:17,262 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59c2b5d04/5802dba2560742698524790144312b0b/FLAG6886d84e2
[2022-01-10 03:04:17,708 INFO  L306              CDTParser]: Found 1 translation units.
[2022-01-10 03:04:17,708 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound5.c
[2022-01-10 03:04:17,713 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59c2b5d04/5802dba2560742698524790144312b0b/FLAG6886d84e2
[2022-01-10 03:04:17,724 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59c2b5d04/5802dba2560742698524790144312b0b
[2022-01-10 03:04:17,726 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2022-01-10 03:04:17,727 INFO  L131        ToolchainWalker]: Walking toolchain with 5 elements.
[2022-01-10 03:04:17,730 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2022-01-10 03:04:17,731 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2022-01-10 03:04:17,733 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2022-01-10 03:04:17,734 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 03:04:17" (1/1) ...
[2022-01-10 03:04:17,735 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71c68d55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:04:17, skipping insertion in model container
[2022-01-10 03:04:17,735 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 03:04:17" (1/1) ...
[2022-01-10 03:04:17,739 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2022-01-10 03:04:17,759 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2022-01-10 03:04:17,920 WARN  L230   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound5.c[525,538]
[2022-01-10 03:04:17,966 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-01-10 03:04:17,975 INFO  L203         MainTranslator]: Completed pre-run
[2022-01-10 03:04:17,987 WARN  L230   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound5.c[525,538]
[2022-01-10 03:04:18,013 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-01-10 03:04:18,030 INFO  L208         MainTranslator]: Completed translation
[2022-01-10 03:04:18,031 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:04:18 WrapperNode
[2022-01-10 03:04:18,031 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2022-01-10 03:04:18,032 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2022-01-10 03:04:18,032 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2022-01-10 03:04:18,032 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2022-01-10 03:04:18,037 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:04:18" (1/1) ...
[2022-01-10 03:04:18,045 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:04:18" (1/1) ...
[2022-01-10 03:04:18,059 INFO  L137                Inliner]: procedures = 14, calls = 18, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 53
[2022-01-10 03:04:18,059 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2022-01-10 03:04:18,060 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2022-01-10 03:04:18,060 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2022-01-10 03:04:18,060 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2022-01-10 03:04:18,066 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:04:18" (1/1) ...
[2022-01-10 03:04:18,066 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:04:18" (1/1) ...
[2022-01-10 03:04:18,070 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:04:18" (1/1) ...
[2022-01-10 03:04:18,071 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:04:18" (1/1) ...
[2022-01-10 03:04:18,079 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:04:18" (1/1) ...
[2022-01-10 03:04:18,082 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:04:18" (1/1) ...
[2022-01-10 03:04:18,083 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:04:18" (1/1) ...
[2022-01-10 03:04:18,084 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2022-01-10 03:04:18,085 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2022-01-10 03:04:18,085 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2022-01-10 03:04:18,085 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2022-01-10 03:04:18,086 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:04:18" (1/1) ...
[2022-01-10 03:04:18,091 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-01-10 03:04:18,101 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-10 03:04:18,125 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 03:04:18,134 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 03:04:18,164 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2022-01-10 03:04:18,165 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1
[2022-01-10 03:04:18,165 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2022-01-10 03:04:18,165 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2022-01-10 03:04:18,165 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2022-01-10 03:04:18,165 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2022-01-10 03:04:18,165 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2022-01-10 03:04:18,165 INFO  L138     BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2022-01-10 03:04:18,211 INFO  L234             CfgBuilder]: Building ICFG
[2022-01-10 03:04:18,213 INFO  L260             CfgBuilder]: Building CFG for each procedure with an implementation
[2022-01-10 03:04:18,383 INFO  L275             CfgBuilder]: Performing block encoding
[2022-01-10 03:04:18,403 INFO  L294             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2022-01-10 03:04:18,403 INFO  L299             CfgBuilder]: Removed 2 assume(true) statements.
[2022-01-10 03:04:18,404 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 03:04:18 BoogieIcfgContainer
[2022-01-10 03:04:18,404 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2022-01-10 03:04:18,405 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2022-01-10 03:04:18,406 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2022-01-10 03:04:18,418 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2022-01-10 03:04:18,419 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 03:04:17" (1/3) ...
[2022-01-10 03:04:18,419 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25ef458b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 03:04:18, skipping insertion in model container
[2022-01-10 03:04:18,419 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:04:18" (2/3) ...
[2022-01-10 03:04:18,420 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25ef458b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 03:04:18, skipping insertion in model container
[2022-01-10 03:04:18,420 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 03:04:18" (3/3) ...
[2022-01-10 03:04:18,421 INFO  L111   eAbstractionObserver]: Analyzing ICFG dijkstra-u_valuebound5.c
[2022-01-10 03:04:18,424 INFO  L204   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2022-01-10 03:04:18,424 INFO  L163   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2022-01-10 03:04:18,475 INFO  L338      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2022-01-10 03:04:18,483 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 03:04:18,483 INFO  L340      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2022-01-10 03:04:18,496 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 33 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11)
[2022-01-10 03:04:18,500 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 20
[2022-01-10 03:04:18,500 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 03:04:18,501 INFO  L514         BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 03:04:18,501 INFO  L402      AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 03:04:18,509 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 03:04:18,509 INFO  L85        PathProgramCache]: Analyzing trace with hash -645822239, now seen corresponding path program 1 times
[2022-01-10 03:04:18,517 INFO  L121   FreeRefinementEngine]: Executing refinement strategy WOLF
[2022-01-10 03:04:18,518 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [687631640]
[2022-01-10 03:04:18,519 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 03:04:18,519 INFO  L168          SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3
[2022-01-10 03:04:18,519 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat
[2022-01-10 03:04:18,521 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null)
[2022-01-10 03:04:18,535 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process
[2022-01-10 03:04:18,595 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 03:04:18,602 INFO  L263         TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 1 conjunts are in the unsatisfiable core
[2022-01-10 03:04:18,605 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 03:04:18,672 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2022-01-10 03:04:18,672 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2022-01-10 03:04:18,672 INFO  L139   FreeRefinementEngine]: Strategy WOLF found an infeasible trace
[2022-01-10 03:04:18,673 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [687631640]
[2022-01-10 03:04:18,673 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleMathsat [687631640] provided 1 perfect and 0 imperfect interpolant sequences
[2022-01-10 03:04:18,673 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-01-10 03:04:18,674 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2022-01-10 03:04:18,675 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141538912]
[2022-01-10 03:04:18,675 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-10 03:04:18,678 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 2 states
[2022-01-10 03:04:18,679 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF
[2022-01-10 03:04:18,707 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2022-01-10 03:04:18,708 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2022-01-10 03:04:18,709 INFO  L87              Difference]: Start difference. First operand  has 33 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand  has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2)
[2022-01-10 03:04:18,730 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 03:04:18,730 INFO  L93              Difference]: Finished difference Result 63 states and 107 transitions.
[2022-01-10 03:04:18,731 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. 
[2022-01-10 03:04:18,732 INFO  L78                 Accepts]: Start accepts. Automaton has  has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19
[2022-01-10 03:04:18,732 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 03:04:18,737 INFO  L225             Difference]: With dead ends: 63
[2022-01-10 03:04:18,737 INFO  L226             Difference]: Without dead ends: 29
[2022-01-10 03:04:18,740 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 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 03:04:18,743 INFO  L933         BasicCegarLoop]: 44 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, 44 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 03:04:18,743 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-01-10 03:04:18,754 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 29 states.
[2022-01-10 03:04:18,770 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29.
[2022-01-10 03:04:18,771 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 29 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10)
[2022-01-10 03:04:18,772 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions.
[2022-01-10 03:04:18,773 INFO  L78                 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 19
[2022-01-10 03:04:18,773 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 03:04:18,773 INFO  L470      AbstractCegarLoop]: Abstraction has 29 states and 40 transitions.
[2022-01-10 03:04:18,773 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2)
[2022-01-10 03:04:18,773 INFO  L276                IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions.
[2022-01-10 03:04:18,774 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 21
[2022-01-10 03:04:18,774 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 03:04:18,774 INFO  L514         BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 03:04:18,782 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0
[2022-01-10 03:04:18,984 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3
[2022-01-10 03:04:18,985 INFO  L402      AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 03:04:18,988 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 03:04:18,989 INFO  L85        PathProgramCache]: Analyzing trace with hash -1757085840, now seen corresponding path program 1 times
[2022-01-10 03:04:18,991 INFO  L121   FreeRefinementEngine]: Executing refinement strategy WOLF
[2022-01-10 03:04:18,991 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [633571766]
[2022-01-10 03:04:18,991 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 03:04:18,992 INFO  L168          SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3
[2022-01-10 03:04:18,992 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat
[2022-01-10 03:04:18,994 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null)
[2022-01-10 03:04:18,996 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process
[2022-01-10 03:04:19,060 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 03:04:19,061 INFO  L263         TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 10 conjunts are in the unsatisfiable core
[2022-01-10 03:04:19,063 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 03:04:19,371 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-01-10 03:04:19,371 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-01-10 03:04:19,535 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2022-01-10 03:04:19,536 INFO  L139   FreeRefinementEngine]: Strategy WOLF found an infeasible trace
[2022-01-10 03:04:19,536 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [633571766]
[2022-01-10 03:04:19,536 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleMathsat [633571766] provided 1 perfect and 1 imperfect interpolant sequences
[2022-01-10 03:04:19,536 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2022-01-10 03:04:19,536 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 13
[2022-01-10 03:04:19,537 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045134201]
[2022-01-10 03:04:19,537 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-10 03:04:19,538 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2022-01-10 03:04:19,538 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF
[2022-01-10 03:04:19,538 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2022-01-10 03:04:19,538 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156
[2022-01-10 03:04:19,539 INFO  L87              Difference]: Start difference. First operand 29 states and 40 transitions. Second operand  has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2)
[2022-01-10 03:04:21,234 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 03:04:21,234 INFO  L93              Difference]: Finished difference Result 48 states and 68 transitions.
[2022-01-10 03:04:21,247 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2022-01-10 03:04:21,248 INFO  L78                 Accepts]: Start accepts. Automaton has  has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20
[2022-01-10 03:04:21,248 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 03:04:21,249 INFO  L225             Difference]: With dead ends: 48
[2022-01-10 03:04:21,249 INFO  L226             Difference]: Without dead ends: 46
[2022-01-10 03:04:21,250 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182
[2022-01-10 03:04:21,250 INFO  L933         BasicCegarLoop]: 49 mSDtfsCounter, 10 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time
[2022-01-10 03:04:21,251 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 168 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time]
[2022-01-10 03:04:21,251 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 46 states.
[2022-01-10 03:04:21,257 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 37.
[2022-01-10 03:04:21,258 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 37 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 23 states have internal predecessors, (26), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11)
[2022-01-10 03:04:21,260 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 49 transitions.
[2022-01-10 03:04:21,260 INFO  L78                 Accepts]: Start accepts. Automaton has 37 states and 49 transitions. Word has length 20
[2022-01-10 03:04:21,261 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 03:04:21,261 INFO  L470      AbstractCegarLoop]: Abstraction has 37 states and 49 transitions.
[2022-01-10 03:04:21,261 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2)
[2022-01-10 03:04:21,261 INFO  L276                IsEmpty]: Start isEmpty. Operand 37 states and 49 transitions.
[2022-01-10 03:04:21,261 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 23
[2022-01-10 03:04:21,262 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 03:04:21,262 INFO  L514         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 03:04:21,270 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0
[2022-01-10 03:04:21,468 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3
[2022-01-10 03:04:21,468 INFO  L402      AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 03:04:21,469 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 03:04:21,469 INFO  L85        PathProgramCache]: Analyzing trace with hash -332038773, now seen corresponding path program 1 times
[2022-01-10 03:04:21,469 INFO  L121   FreeRefinementEngine]: Executing refinement strategy WOLF
[2022-01-10 03:04:21,469 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [124730074]
[2022-01-10 03:04:21,469 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 03:04:21,469 INFO  L168          SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3
[2022-01-10 03:04:21,470 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat
[2022-01-10 03:04:21,471 INFO  L229       MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null)
[2022-01-10 03:04:21,472 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process
[2022-01-10 03:04:21,492 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 03:04:21,494 INFO  L263         TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 11 conjunts are in the unsatisfiable core
[2022-01-10 03:04:21,495 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 03:04:21,872 INFO  L134       CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-01-10 03:04:21,873 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-01-10 03:04:22,379 INFO  L134       CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2022-01-10 03:04:22,380 INFO  L139   FreeRefinementEngine]: Strategy WOLF found an infeasible trace
[2022-01-10 03:04:22,380 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [124730074]
[2022-01-10 03:04:22,380 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleMathsat [124730074] provided 0 perfect and 2 imperfect interpolant sequences
[2022-01-10 03:04:22,380 INFO  L186   FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2022-01-10 03:04:22,380 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 15
[2022-01-10 03:04:22,380 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279903674]
[2022-01-10 03:04:22,381 INFO  L85    oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2022-01-10 03:04:22,381 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 15 states
[2022-01-10 03:04:22,381 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF
[2022-01-10 03:04:22,381 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants.
[2022-01-10 03:04:22,382 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210
[2022-01-10 03:04:22,382 INFO  L87              Difference]: Start difference. First operand 37 states and 49 transitions. Second operand  has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 12 states have internal predecessors, (25), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4)
[2022-01-10 03:04:26,350 WARN  L534   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers []
[2022-01-10 03:04:28,356 WARN  L534   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers []
[2022-01-10 03:04:31,358 WARN  L534   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers []
[2022-01-10 03:04:33,364 WARN  L534   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers []
[2022-01-10 03:04:38,803 WARN  L534   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers []
[2022-01-10 03:04:40,805 WARN  L534   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers []
[2022-01-10 03:04:43,213 WARN  L534   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers []
[2022-01-10 03:04:45,215 WARN  L534   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers []
[2022-01-10 03:04:47,920 WARN  L534   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers []
[2022-01-10 03:04:49,922 WARN  L534   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers []
[2022-01-10 03:04:49,923 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 03:04:49,923 INFO  L93              Difference]: Finished difference Result 129 states and 205 transitions.
[2022-01-10 03:04:49,948 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. 
[2022-01-10 03:04:49,949 INFO  L78                 Accepts]: Start accepts. Automaton has  has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 12 states have internal predecessors, (25), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 22
[2022-01-10 03:04:49,949 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 03:04:49,950 INFO  L225             Difference]: With dead ends: 129
[2022-01-10 03:04:49,951 INFO  L226             Difference]: Without dead ends: 109
[2022-01-10 03:04:49,951 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506
[2022-01-10 03:04:49,952 INFO  L933         BasicCegarLoop]: 73 mSDtfsCounter, 66 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 184 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.9s IncrementalHoareTripleChecker+Time
[2022-01-10 03:04:49,952 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 597 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 440 Invalid, 10 Unknown, 0 Unchecked, 26.9s Time]
[2022-01-10 03:04:49,953 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 109 states.
[2022-01-10 03:04:49,967 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 75.
[2022-01-10 03:04:49,967 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 75 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 41 states have internal predecessors, (46), 33 states have call successors, (33), 4 states have call predecessors, (33), 4 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31)
[2022-01-10 03:04:49,968 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 110 transitions.
[2022-01-10 03:04:49,968 INFO  L78                 Accepts]: Start accepts. Automaton has 75 states and 110 transitions. Word has length 22
[2022-01-10 03:04:49,969 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 03:04:49,969 INFO  L470      AbstractCegarLoop]: Abstraction has 75 states and 110 transitions.
[2022-01-10 03:04:49,969 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 12 states have internal predecessors, (25), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4)
[2022-01-10 03:04:49,969 INFO  L276                IsEmpty]: Start isEmpty. Operand 75 states and 110 transitions.
[2022-01-10 03:04:49,970 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 31
[2022-01-10 03:04:49,970 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 03:04:49,970 INFO  L514         BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 03:04:49,979 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0
[2022-01-10 03:04:50,182 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3
[2022-01-10 03:04:50,183 INFO  L402      AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 03:04:50,183 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 03:04:50,183 INFO  L85        PathProgramCache]: Analyzing trace with hash 1041809680, now seen corresponding path program 1 times
[2022-01-10 03:04:50,184 INFO  L121   FreeRefinementEngine]: Executing refinement strategy WOLF
[2022-01-10 03:04:50,188 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2124595773]
[2022-01-10 03:04:50,188 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 03:04:50,188 INFO  L168          SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3
[2022-01-10 03:04:50,188 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat
[2022-01-10 03:04:50,190 INFO  L229       MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null)
[2022-01-10 03:04:50,191 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process
[2022-01-10 03:04:50,338 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 03:04:50,354 INFO  L263         TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core
[2022-01-10 03:04:50,356 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 03:04:50,664 INFO  L134       CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked.
[2022-01-10 03:04:50,664 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-01-10 03:04:53,814 INFO  L139   FreeRefinementEngine]: Strategy WOLF found an infeasible trace
[2022-01-10 03:04:53,814 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2124595773]
[2022-01-10 03:04:53,814 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleMathsat [2124595773] provided 0 perfect and 1 imperfect interpolant sequences
[2022-01-10 03:04:53,814 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2069738981]
[2022-01-10 03:04:53,814 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 03:04:53,815 INFO  L168          SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt
[2022-01-10 03:04:53,815 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4
[2022-01-10 03:04:53,816 INFO  L229       MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null)
[2022-01-10 03:04:53,817 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process
[2022-01-10 03:04:54,065 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 03:04:54,067 INFO  L263         TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core
[2022-01-10 03:04:54,069 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 03:04:55,246 INFO  L134       CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked.
[2022-01-10 03:04:55,247 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2022-01-10 03:04:55,247 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2069738981] provided 1 perfect and 0 imperfect interpolant sequences
[2022-01-10 03:04:55,247 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2022-01-10 03:04:55,247 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9
[2022-01-10 03:04:55,247 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454887268]
[2022-01-10 03:04:55,247 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-10 03:04:55,248 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2022-01-10 03:04:55,248 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF
[2022-01-10 03:04:55,248 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2022-01-10 03:04:55,248 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132
[2022-01-10 03:04:55,248 INFO  L87              Difference]: Start difference. First operand 75 states and 110 transitions. Second operand  has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4)
[2022-01-10 03:04:57,210 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 03:04:57,210 INFO  L93              Difference]: Finished difference Result 96 states and 138 transitions.
[2022-01-10 03:04:57,222 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2022-01-10 03:04:57,223 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30
[2022-01-10 03:04:57,223 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 03:04:57,225 INFO  L225             Difference]: With dead ends: 96
[2022-01-10 03:04:57,225 INFO  L226             Difference]: Without dead ends: 76
[2022-01-10 03:04:57,225 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156
[2022-01-10 03:04:57,226 INFO  L933         BasicCegarLoop]: 45 mSDtfsCounter, 7 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time
[2022-01-10 03:04:57,226 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 153 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time]
[2022-01-10 03:04:57,227 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 76 states.
[2022-01-10 03:04:57,236 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76.
[2022-01-10 03:04:57,237 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 76 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 41 states have internal predecessors, (46), 34 states have call successors, (34), 4 states have call predecessors, (34), 4 states have return successors, (32), 30 states have call predecessors, (32), 32 states have call successors, (32)
[2022-01-10 03:04:57,238 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 112 transitions.
[2022-01-10 03:04:57,238 INFO  L78                 Accepts]: Start accepts. Automaton has 76 states and 112 transitions. Word has length 30
[2022-01-10 03:04:57,238 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 03:04:57,238 INFO  L470      AbstractCegarLoop]: Abstraction has 76 states and 112 transitions.
[2022-01-10 03:04:57,239 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4)
[2022-01-10 03:04:57,239 INFO  L276                IsEmpty]: Start isEmpty. Operand 76 states and 112 transitions.
[2022-01-10 03:04:57,239 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 30
[2022-01-10 03:04:57,239 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 03:04:57,239 INFO  L514         BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 03:04:57,250 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0
[2022-01-10 03:04:57,454 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (6)] Ended with exit code 0
[2022-01-10 03:04:57,654 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt
[2022-01-10 03:04:57,654 INFO  L402      AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 03:04:57,655 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 03:04:57,655 INFO  L85        PathProgramCache]: Analyzing trace with hash -1015454531, now seen corresponding path program 1 times
[2022-01-10 03:04:57,655 INFO  L121   FreeRefinementEngine]: Executing refinement strategy WOLF
[2022-01-10 03:04:57,655 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [447521431]
[2022-01-10 03:04:57,655 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 03:04:57,655 INFO  L168          SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3
[2022-01-10 03:04:57,655 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat
[2022-01-10 03:04:57,658 INFO  L229       MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null)
[2022-01-10 03:04:57,659 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process
[2022-01-10 03:04:57,713 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 03:04:57,717 INFO  L263         TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 12 conjunts are in the unsatisfiable core
[2022-01-10 03:04:57,719 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 03:04:58,326 INFO  L134       CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-01-10 03:04:58,326 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-01-10 03:05:02,524 INFO  L134       CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2022-01-10 03:05:02,524 INFO  L139   FreeRefinementEngine]: Strategy WOLF found an infeasible trace
[2022-01-10 03:05:02,524 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [447521431]
[2022-01-10 03:05:02,524 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleMathsat [447521431] provided 0 perfect and 2 imperfect interpolant sequences
[2022-01-10 03:05:02,524 INFO  L186   FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2022-01-10 03:05:02,525 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 15
[2022-01-10 03:05:02,525 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979425348]
[2022-01-10 03:05:02,525 INFO  L85    oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2022-01-10 03:05:02,525 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 15 states
[2022-01-10 03:05:02,525 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF
[2022-01-10 03:05:02,526 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants.
[2022-01-10 03:05:02,526 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210
[2022-01-10 03:05:02,526 INFO  L87              Difference]: Start difference. First operand 76 states and 112 transitions. Second operand  has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 12 states have internal predecessors, (32), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6)
[2022-01-10 03:05:07,047 WARN  L534   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers []
[2022-01-10 03:05:09,378 WARN  L534   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers []
[2022-01-10 03:05:12,256 WARN  L534   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers []
[2022-01-10 03:05:15,669 WARN  L534   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers []
[2022-01-10 03:05:21,003 WARN  L534   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers []
[2022-01-10 03:05:23,006 WARN  L534   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers []
[2022-01-10 03:05:26,222 WARN  L534   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers []
[2022-01-10 03:05:28,225 WARN  L534   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers []
[2022-01-10 03:05:31,946 WARN  L534   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers []
[2022-01-10 03:05:33,949 WARN  L534   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers []
[2022-01-10 03:05:34,049 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 03:05:34,049 INFO  L93              Difference]: Finished difference Result 152 states and 228 transitions.
[2022-01-10 03:05:34,050 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. 
[2022-01-10 03:05:34,050 INFO  L78                 Accepts]: Start accepts. Automaton has  has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 12 states have internal predecessors, (32), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 29
[2022-01-10 03:05:34,050 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 03:05:34,052 INFO  L225             Difference]: With dead ends: 152
[2022-01-10 03:05:34,052 INFO  L226             Difference]: Without dead ends: 110
[2022-01-10 03:05:34,052 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306
[2022-01-10 03:05:34,053 INFO  L933         BasicCegarLoop]: 70 mSDtfsCounter, 47 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 108 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.2s IncrementalHoareTripleChecker+Time
[2022-01-10 03:05:34,053 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 511 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 335 Invalid, 10 Unknown, 0 Unchecked, 30.2s Time]
[2022-01-10 03:05:34,053 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 110 states.
[2022-01-10 03:05:34,079 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 96.
[2022-01-10 03:05:34,079 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 96 states, 44 states have (on average 1.1590909090909092) internal successors, (51), 47 states have internal predecessors, (51), 45 states have call successors, (45), 6 states have call predecessors, (45), 6 states have return successors, (44), 42 states have call predecessors, (44), 44 states have call successors, (44)
[2022-01-10 03:05:34,096 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 140 transitions.
[2022-01-10 03:05:34,096 INFO  L78                 Accepts]: Start accepts. Automaton has 96 states and 140 transitions. Word has length 29
[2022-01-10 03:05:34,097 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 03:05:34,097 INFO  L470      AbstractCegarLoop]: Abstraction has 96 states and 140 transitions.
[2022-01-10 03:05:34,097 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 12 states have internal predecessors, (32), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6)
[2022-01-10 03:05:34,097 INFO  L276                IsEmpty]: Start isEmpty. Operand 96 states and 140 transitions.
[2022-01-10 03:05:34,101 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 38
[2022-01-10 03:05:34,102 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 03:05:34,102 INFO  L514         BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 03:05:34,111 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0
[2022-01-10 03:05:34,302 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3
[2022-01-10 03:05:34,302 INFO  L402      AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 03:05:34,303 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 03:05:34,303 INFO  L85        PathProgramCache]: Analyzing trace with hash 471295704, now seen corresponding path program 1 times
[2022-01-10 03:05:34,303 INFO  L121   FreeRefinementEngine]: Executing refinement strategy WOLF
[2022-01-10 03:05:34,303 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1537700196]
[2022-01-10 03:05:34,303 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 03:05:34,303 INFO  L168          SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3
[2022-01-10 03:05:34,303 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat
[2022-01-10 03:05:34,305 INFO  L229       MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null)
[2022-01-10 03:05:34,305 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process
[2022-01-10 03:05:34,516 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 03:05:34,546 INFO  L263         TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core
[2022-01-10 03:05:34,548 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 03:05:35,254 INFO  L134       CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked.
[2022-01-10 03:05:35,255 INFO  L328         TraceCheckSpWp]: Computing backward predicates...