./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2018/Problem16.c --full-output --architecture 32bit


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


Checking for ERROR reachability
Using default analysis
Version c3fed411
Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2018/Problem16.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) )

 --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 109d79acc9f0ebf30672589a81cb76b857da77dbea7f7c16d3f17b5b5da23748
--- Real Ultimate output ---
This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41
[2021-12-17 05:29:13,409 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2021-12-17 05:29:13,411 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2021-12-17 05:29:13,445 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2021-12-17 05:29:13,446 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2021-12-17 05:29:13,447 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2021-12-17 05:29:13,448 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2021-12-17 05:29:13,450 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2021-12-17 05:29:13,451 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2021-12-17 05:29:13,452 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2021-12-17 05:29:13,453 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2021-12-17 05:29:13,454 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2021-12-17 05:29:13,454 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2021-12-17 05:29:13,458 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2021-12-17 05:29:13,460 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2021-12-17 05:29:13,461 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2021-12-17 05:29:13,462 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2021-12-17 05:29:13,462 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2021-12-17 05:29:13,464 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2021-12-17 05:29:13,466 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2021-12-17 05:29:13,467 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2021-12-17 05:29:13,469 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2021-12-17 05:29:13,470 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2021-12-17 05:29:13,471 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2021-12-17 05:29:13,473 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2021-12-17 05:29:13,474 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2021-12-17 05:29:13,474 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2021-12-17 05:29:13,475 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2021-12-17 05:29:13,475 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2021-12-17 05:29:13,476 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2021-12-17 05:29:13,476 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2021-12-17 05:29:13,477 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2021-12-17 05:29:13,478 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2021-12-17 05:29:13,478 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2021-12-17 05:29:13,479 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2021-12-17 05:29:13,480 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2021-12-17 05:29:13,480 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2021-12-17 05:29:13,480 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2021-12-17 05:29:13,481 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2021-12-17 05:29:13,481 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2021-12-17 05:29:13,482 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2021-12-17 05:29:13,488 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf
[2021-12-17 05:29:13,508 INFO  L113        SettingsManager]: Loading preferences was successful
[2021-12-17 05:29:13,508 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2021-12-17 05:29:13,508 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2021-12-17 05:29:13,509 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2021-12-17 05:29:13,509 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2021-12-17 05:29:13,510 INFO  L138        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2021-12-17 05:29:13,510 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2021-12-17 05:29:13,510 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2021-12-17 05:29:13,510 INFO  L138        SettingsManager]:  * Use SBE=true
[2021-12-17 05:29:13,511 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2021-12-17 05:29:13,511 INFO  L138        SettingsManager]:  * sizeof long=4
[2021-12-17 05:29:13,511 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2021-12-17 05:29:13,511 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2021-12-17 05:29:13,511 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2021-12-17 05:29:13,511 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2021-12-17 05:29:13,512 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2021-12-17 05:29:13,512 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2021-12-17 05:29:13,512 INFO  L138        SettingsManager]:  * sizeof long double=12
[2021-12-17 05:29:13,512 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2021-12-17 05:29:13,512 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2021-12-17 05:29:13,513 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2021-12-17 05:29:13,513 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2021-12-17 05:29:13,513 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2021-12-17 05:29:13,513 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2021-12-17 05:29:13,513 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2021-12-17 05:29:13,513 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2021-12-17 05:29:13,514 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2021-12-17 05:29:13,514 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2021-12-17 05:29:13,514 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2021-12-17 05:29:13,514 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2021-12-17 05:29:13,514 INFO  L138        SettingsManager]:  * Large block encoding in concurrent analysis=OFF
[2021-12-17 05:29:13,515 INFO  L138        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2021-12-17 05:29:13,515 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2021-12-17 05:29:13,515 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2021-12-17 05:29:13,515 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
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.plugins.generator.cacsl2boogietranslator: Entry function -> main
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) )


Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 109d79acc9f0ebf30672589a81cb76b857da77dbea7f7c16d3f17b5b5da23748
[2021-12-17 05:29:13,776 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2021-12-17 05:29:13,803 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2021-12-17 05:29:13,806 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2021-12-17 05:29:13,807 INFO  L271        PluginConnector]: Initializing CDTParser...
[2021-12-17 05:29:13,808 INFO  L275        PluginConnector]: CDTParser initialized
[2021-12-17 05:29:13,809 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2018/Problem16.c
[2021-12-17 05:29:13,863 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ccceda59/c0d17a4f4e574abfa377c40ba7570ee6/FLAGec9067485
[2021-12-17 05:29:17,428 INFO  L306              CDTParser]: Found 1 translation units.
[2021-12-17 05:29:17,429 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2018/Problem16.c
[2021-12-17 05:29:17,820 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ccceda59/c0d17a4f4e574abfa377c40ba7570ee6/FLAGec9067485
[2021-12-17 05:29:17,986 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ccceda59/c0d17a4f4e574abfa377c40ba7570ee6
[2021-12-17 05:29:17,988 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2021-12-17 05:29:17,989 INFO  L131        ToolchainWalker]: Walking toolchain with 6 elements.
[2021-12-17 05:29:17,990 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2021-12-17 05:29:17,990 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2021-12-17 05:29:17,995 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2021-12-17 05:29:17,996 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 05:29:17" (1/1) ...
[2021-12-17 05:29:17,997 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f13e116 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:29:17, skipping insertion in model container
[2021-12-17 05:29:17,997 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 05:29:17" (1/1) ...
[2021-12-17 05:29:18,003 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2021-12-17 05:29:20,065 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2021-12-17 05:29:20,766 WARN  L230   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2018/Problem16.c[778,791]
[2021-12-17 05:29:20,859 WARN  L230   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2018/Problem16.c[817,830]
[2021-12-17 05:31:24,482 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2021-12-17 05:31:24,506 INFO  L203         MainTranslator]: Completed pre-run
[2021-12-17 05:31:24,530 WARN  L230   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2018/Problem16.c[778,791]
[2021-12-17 05:31:24,531 WARN  L230   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2018/Problem16.c[817,830]
[2021-12-17 05:31:28,735 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2021-12-17 05:31:31,747 INFO  L208         MainTranslator]: Completed translation
[2021-12-17 05:31:31,747 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:31:31 WrapperNode
[2021-12-17 05:31:31,748 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2021-12-17 05:31:31,749 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2021-12-17 05:31:31,749 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2021-12-17 05:31:31,749 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2021-12-17 05:31:31,755 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:31:31" (1/1) ...
[2021-12-17 05:31:33,634 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:31:31" (1/1) ...
[2021-12-17 05:31:38,333 INFO  L137                Inliner]: procedures = 1385, calls = 1376, calls flagged for inlining = 1272, calls inlined = 1272, statements flattened = 632995
[2021-12-17 05:31:38,333 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2021-12-17 05:31:38,334 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2021-12-17 05:31:38,334 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2021-12-17 05:31:38,334 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2021-12-17 05:31:38,342 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:31:31" (1/1) ...
[2021-12-17 05:31:38,342 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:31:31" (1/1) ...
[2021-12-17 05:31:39,210 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:31:31" (1/1) ...
[2021-12-17 05:31:39,211 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:31:31" (1/1) ...
[2021-12-17 05:31:41,581 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:31:31" (1/1) ...
[2021-12-17 05:31:41,983 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:31:31" (1/1) ...
[2021-12-17 05:31:43,167 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:31:31" (1/1) ...
[2021-12-17 05:31:44,181 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2021-12-17 05:31:44,182 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2021-12-17 05:31:44,182 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2021-12-17 05:31:44,182 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2021-12-17 05:31:44,184 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:31:31" (1/1) ...
[2021-12-17 05:31:44,190 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2021-12-17 05:31:44,197 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2021-12-17 05:31:44,210 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)
[2021-12-17 05:31:44,213 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
[2021-12-17 05:31:44,239 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2021-12-17 05:31:44,240 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2021-12-17 05:31:44,240 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2021-12-17 05:31:44,240 INFO  L130     BoogieDeclarations]: Found specification of procedure reach_error_a
[2021-12-17 05:31:44,240 INFO  L138     BoogieDeclarations]: Found implementation of procedure reach_error_a
[2021-12-17 05:31:44,241 INFO  L130     BoogieDeclarations]: Found specification of procedure reach_error_b
[2021-12-17 05:31:44,241 INFO  L138     BoogieDeclarations]: Found implementation of procedure reach_error_b
[2021-12-17 05:31:44,241 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2021-12-17 05:31:45,047 INFO  L236             CfgBuilder]: Building ICFG
[2021-12-17 05:31:45,048 INFO  L262             CfgBuilder]: Building CFG for each procedure with an implementation
[2021-12-17 05:32:50,549 INFO  L277             CfgBuilder]: Performing block encoding
[2021-12-17 05:32:50,597 INFO  L296             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2021-12-17 05:32:50,597 INFO  L301             CfgBuilder]: Removed 1 assume(true) statements.
[2021-12-17 05:32:50,606 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 05:32:50 BoogieIcfgContainer
[2021-12-17 05:32:50,606 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2021-12-17 05:32:50,607 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2021-12-17 05:32:50,607 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2021-12-17 05:32:50,610 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2021-12-17 05:32:50,612 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 05:29:17" (1/3) ...
[2021-12-17 05:32:50,612 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69d7dd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 05:32:50, skipping insertion in model container
[2021-12-17 05:32:50,613 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:31:31" (2/3) ...
[2021-12-17 05:32:50,613 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69d7dd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 05:32:50, skipping insertion in model container
[2021-12-17 05:32:50,613 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 05:32:50" (3/3) ...
[2021-12-17 05:32:50,614 INFO  L111   eAbstractionObserver]: Analyzing ICFG Problem16.c
[2021-12-17 05:32:50,618 INFO  L204   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2021-12-17 05:32:50,619 INFO  L163   ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations.
[2021-12-17 05:32:50,678 INFO  L338      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2021-12-17 05:32:50,685 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
[2021-12-17 05:32:50,686 INFO  L340      AbstractCegarLoop]: Starting to check reachability of 2 error locations.
[2021-12-17 05:32:50,805 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 8618 states, 8513 states have (on average 1.850111594032656) internal successors, (15750), 8515 states have internal predecessors, (15750), 100 states have call successors, (100), 2 states have call predecessors, (100), 2 states have return successors, (100), 100 states have call predecessors, (100), 100 states have call successors, (100)
[2021-12-17 05:32:50,821 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 14
[2021-12-17 05:32:50,821 INFO  L506         BasicCegarLoop]: Found error trace
[2021-12-17 05:32:50,822 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-12-17 05:32:50,823 INFO  L402      AbstractCegarLoop]: === Iteration 1 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-12-17 05:32:50,827 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-12-17 05:32:50,827 INFO  L85        PathProgramCache]: Analyzing trace with hash 2026736529, now seen corresponding path program 1 times
[2021-12-17 05:32:50,835 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-12-17 05:32:50,835 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204763565]
[2021-12-17 05:32:50,835 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-12-17 05:32:50,836 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-12-17 05:32:51,122 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-12-17 05:32:51,332 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-12-17 05:32:51,332 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-12-17 05:32:51,333 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204763565]
[2021-12-17 05:32:51,333 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204763565] provided 1 perfect and 0 imperfect interpolant sequences
[2021-12-17 05:32:51,334 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-12-17 05:32:51,334 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2021-12-17 05:32:51,335 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988243623]
[2021-12-17 05:32:51,336 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-12-17 05:32:51,339 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2021-12-17 05:32:51,339 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-12-17 05:32:51,379 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2021-12-17 05:32:51,380 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2021-12-17 05:32:51,403 INFO  L87              Difference]: Start difference. First operand  has 8618 states, 8513 states have (on average 1.850111594032656) internal successors, (15750), 8515 states have internal predecessors, (15750), 100 states have call successors, (100), 2 states have call predecessors, (100), 2 states have return successors, (100), 100 states have call predecessors, (100), 100 states have call successors, (100) Second operand  has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-17 05:33:16,327 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-12-17 05:33:16,328 INFO  L93              Difference]: Finished difference Result 19853 states and 36836 transitions.
[2021-12-17 05:33:16,336 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2021-12-17 05:33:16,337 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13
[2021-12-17 05:33:16,337 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-12-17 05:33:16,397 INFO  L225             Difference]: With dead ends: 19853
[2021-12-17 05:33:16,397 INFO  L226             Difference]: Without dead ends: 11228
[2021-12-17 05:33:16,412 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2021-12-17 05:33:16,417 INFO  L933         BasicCegarLoop]: 14954 mSDtfsCounter, 3239 mSDsluCounter, 11506 mSDsCounter, 0 mSdLazyCounter, 25181 mSolverCounterSat, 623 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3239 SdHoareTripleChecker+Valid, 26460 SdHoareTripleChecker+Invalid, 25804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 623 IncrementalHoareTripleChecker+Valid, 25181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.3s IncrementalHoareTripleChecker+Time
[2021-12-17 05:33:16,418 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [3239 Valid, 26460 Invalid, 25804 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [623 Valid, 25181 Invalid, 0 Unknown, 0 Unchecked, 24.3s Time]
[2021-12-17 05:33:16,448 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 11228 states.
[2021-12-17 05:33:16,668 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 11228 to 10284.
[2021-12-17 05:33:16,704 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 10284 states, 10182 states have (on average 1.8511098016106855) internal successors, (18848), 10281 states have internal predecessors, (18848), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-17 05:33:16,746 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 10284 states to 10284 states and 18948 transitions.
[2021-12-17 05:33:16,748 INFO  L78                 Accepts]: Start accepts. Automaton has 10284 states and 18948 transitions. Word has length 13
[2021-12-17 05:33:16,748 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-12-17 05:33:16,749 INFO  L470      AbstractCegarLoop]: Abstraction has 10284 states and 18948 transitions.
[2021-12-17 05:33:16,749 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-17 05:33:16,750 INFO  L276                IsEmpty]: Start isEmpty. Operand 10284 states and 18948 transitions.
[2021-12-17 05:33:16,757 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 21
[2021-12-17 05:33:16,757 INFO  L506         BasicCegarLoop]: Found error trace
[2021-12-17 05:33:16,757 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-12-17 05:33:16,757 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2021-12-17 05:33:16,758 INFO  L402      AbstractCegarLoop]: === Iteration 2 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-12-17 05:33:16,760 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-12-17 05:33:16,760 INFO  L85        PathProgramCache]: Analyzing trace with hash -93322037, now seen corresponding path program 1 times
[2021-12-17 05:33:16,761 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-12-17 05:33:16,761 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092330222]
[2021-12-17 05:33:16,761 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-12-17 05:33:16,762 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-12-17 05:33:16,832 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-12-17 05:33:16,970 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-12-17 05:33:16,970 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-12-17 05:33:16,971 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092330222]
[2021-12-17 05:33:16,971 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092330222] provided 1 perfect and 0 imperfect interpolant sequences
[2021-12-17 05:33:16,971 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-12-17 05:33:16,971 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2021-12-17 05:33:16,972 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370683939]
[2021-12-17 05:33:16,972 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-12-17 05:33:16,973 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2021-12-17 05:33:16,973 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-12-17 05:33:16,974 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2021-12-17 05:33:16,974 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2021-12-17 05:33:16,974 INFO  L87              Difference]: Start difference. First operand 10284 states and 18948 transitions. Second operand  has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-17 05:33:49,047 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-12-17 05:33:49,047 INFO  L93              Difference]: Finished difference Result 28172 states and 51666 transitions.
[2021-12-17 05:33:49,048 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2021-12-17 05:33:49,048 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20
[2021-12-17 05:33:49,048 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-12-17 05:33:49,102 INFO  L225             Difference]: With dead ends: 28172
[2021-12-17 05:33:49,103 INFO  L226             Difference]: Without dead ends: 17890
[2021-12-17 05:33:49,118 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2021-12-17 05:33:49,119 INFO  L933         BasicCegarLoop]: 18437 mSDtfsCounter, 8263 mSDsluCounter, 12977 mSDsCounter, 0 mSdLazyCounter, 33252 mSolverCounterSat, 1716 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8263 SdHoareTripleChecker+Valid, 31414 SdHoareTripleChecker+Invalid, 34968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1716 IncrementalHoareTripleChecker+Valid, 33252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.5s IncrementalHoareTripleChecker+Time
[2021-12-17 05:33:49,120 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [8263 Valid, 31414 Invalid, 34968 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1716 Valid, 33252 Invalid, 0 Unknown, 0 Unchecked, 31.5s Time]
[2021-12-17 05:33:49,139 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 17890 states.
[2021-12-17 05:33:49,357 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 17890 to 15292.
[2021-12-17 05:33:49,384 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 15292 states, 15190 states have (on average 1.8283080974325214) internal successors, (27772), 15289 states have internal predecessors, (27772), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-17 05:33:49,415 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 15292 states to 15292 states and 27872 transitions.
[2021-12-17 05:33:49,417 INFO  L78                 Accepts]: Start accepts. Automaton has 15292 states and 27872 transitions. Word has length 20
[2021-12-17 05:33:49,417 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-12-17 05:33:49,420 INFO  L470      AbstractCegarLoop]: Abstraction has 15292 states and 27872 transitions.
[2021-12-17 05:33:49,420 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-17 05:33:49,420 INFO  L276                IsEmpty]: Start isEmpty. Operand 15292 states and 27872 transitions.
[2021-12-17 05:33:49,424 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 34
[2021-12-17 05:33:49,425 INFO  L506         BasicCegarLoop]: Found error trace
[2021-12-17 05:33:49,425 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-12-17 05:33:49,425 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2021-12-17 05:33:49,426 INFO  L402      AbstractCegarLoop]: === Iteration 3 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-12-17 05:33:49,426 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-12-17 05:33:49,431 INFO  L85        PathProgramCache]: Analyzing trace with hash 2128878770, now seen corresponding path program 1 times
[2021-12-17 05:33:49,431 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-12-17 05:33:49,431 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309723882]
[2021-12-17 05:33:49,431 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-12-17 05:33:49,432 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-12-17 05:33:49,498 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-12-17 05:33:49,585 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-12-17 05:33:49,586 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-12-17 05:33:49,586 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309723882]
[2021-12-17 05:33:49,587 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309723882] provided 1 perfect and 0 imperfect interpolant sequences
[2021-12-17 05:33:49,587 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-12-17 05:33:49,587 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2021-12-17 05:33:49,587 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012833145]
[2021-12-17 05:33:49,588 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-12-17 05:33:49,588 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2021-12-17 05:33:49,589 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-12-17 05:33:49,589 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-12-17 05:33:49,589 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-12-17 05:33:49,590 INFO  L87              Difference]: Start difference. First operand 15292 states and 27872 transitions. Second operand  has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-17 05:33:50,451 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-12-17 05:33:50,451 INFO  L93              Difference]: Finished difference Result 44345 states and 80786 transitions.
[2021-12-17 05:33:50,451 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2021-12-17 05:33:50,451 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33
[2021-12-17 05:33:50,451 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-12-17 05:33:50,511 INFO  L225             Difference]: With dead ends: 44345
[2021-12-17 05:33:50,511 INFO  L226             Difference]: Without dead ends: 29055
[2021-12-17 05:33:50,542 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-12-17 05:33:50,543 INFO  L933         BasicCegarLoop]: 16236 mSDtfsCounter, 14909 mSDsluCounter, 15334 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14909 SdHoareTripleChecker+Valid, 31570 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time
[2021-12-17 05:33:50,544 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [14909 Valid, 31570 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time]
[2021-12-17 05:33:50,575 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 29055 states.
[2021-12-17 05:33:50,980 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 29055 to 28947.
[2021-12-17 05:33:51,030 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 28947 states, 28845 states have (on average 1.826486392789045) internal successors, (52685), 28944 states have internal predecessors, (52685), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-17 05:33:51,090 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 28947 states to 28947 states and 52785 transitions.
[2021-12-17 05:33:51,091 INFO  L78                 Accepts]: Start accepts. Automaton has 28947 states and 52785 transitions. Word has length 33
[2021-12-17 05:33:51,092 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-12-17 05:33:51,092 INFO  L470      AbstractCegarLoop]: Abstraction has 28947 states and 52785 transitions.
[2021-12-17 05:33:51,092 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-17 05:33:51,092 INFO  L276                IsEmpty]: Start isEmpty. Operand 28947 states and 52785 transitions.
[2021-12-17 05:33:51,094 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 35
[2021-12-17 05:33:51,094 INFO  L506         BasicCegarLoop]: Found error trace
[2021-12-17 05:33:51,094 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-12-17 05:33:51,095 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2021-12-17 05:33:51,095 INFO  L402      AbstractCegarLoop]: === Iteration 4 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-12-17 05:33:51,096 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-12-17 05:33:51,096 INFO  L85        PathProgramCache]: Analyzing trace with hash -495105420, now seen corresponding path program 1 times
[2021-12-17 05:33:51,096 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-12-17 05:33:51,096 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593936190]
[2021-12-17 05:33:51,096 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-12-17 05:33:51,097 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-12-17 05:33:51,156 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-12-17 05:33:51,281 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-12-17 05:33:51,282 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-12-17 05:33:51,282 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593936190]
[2021-12-17 05:33:51,282 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593936190] provided 1 perfect and 0 imperfect interpolant sequences
[2021-12-17 05:33:51,282 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-12-17 05:33:51,283 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2021-12-17 05:33:51,283 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400968710]
[2021-12-17 05:33:51,283 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-12-17 05:33:51,284 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2021-12-17 05:33:51,284 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-12-17 05:33:51,284 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2021-12-17 05:33:51,284 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2021-12-17 05:33:51,285 INFO  L87              Difference]: Start difference. First operand 28947 states and 52785 transitions. Second operand  has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-17 05:34:17,890 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-12-17 05:34:17,895 INFO  L93              Difference]: Finished difference Result 73823 states and 134243 transitions.
[2021-12-17 05:34:17,896 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2021-12-17 05:34:17,896 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34
[2021-12-17 05:34:17,896 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-12-17 05:34:18,000 INFO  L225             Difference]: With dead ends: 73823
[2021-12-17 05:34:18,001 INFO  L226             Difference]: Without dead ends: 44878
[2021-12-17 05:34:18,033 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2021-12-17 05:34:18,040 INFO  L933         BasicCegarLoop]: 20218 mSDtfsCounter, 18209 mSDsluCounter, 11876 mSDsCounter, 0 mSdLazyCounter, 21782 mSolverCounterSat, 2239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18209 SdHoareTripleChecker+Valid, 32094 SdHoareTripleChecker+Invalid, 24021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2239 IncrementalHoareTripleChecker+Valid, 21782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.0s IncrementalHoareTripleChecker+Time
[2021-12-17 05:34:18,041 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [18209 Valid, 32094 Invalid, 24021 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2239 Valid, 21782 Invalid, 0 Unknown, 0 Unchecked, 26.0s Time]
[2021-12-17 05:34:18,076 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 44878 states.
[2021-12-17 05:34:18,531 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 44878 to 39707.
[2021-12-17 05:34:18,588 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 39707 states, 39605 states have (on average 1.8132811513697766) internal successors, (71815), 39704 states have internal predecessors, (71815), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-17 05:34:18,677 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 39707 states to 39707 states and 71915 transitions.
[2021-12-17 05:34:18,678 INFO  L78                 Accepts]: Start accepts. Automaton has 39707 states and 71915 transitions. Word has length 34
[2021-12-17 05:34:18,678 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-12-17 05:34:18,678 INFO  L470      AbstractCegarLoop]: Abstraction has 39707 states and 71915 transitions.
[2021-12-17 05:34:18,678 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-17 05:34:18,678 INFO  L276                IsEmpty]: Start isEmpty. Operand 39707 states and 71915 transitions.
[2021-12-17 05:34:18,681 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 38
[2021-12-17 05:34:18,681 INFO  L506         BasicCegarLoop]: Found error trace
[2021-12-17 05:34:18,681 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-12-17 05:34:18,682 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2021-12-17 05:34:18,682 INFO  L402      AbstractCegarLoop]: === Iteration 5 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-12-17 05:34:18,682 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-12-17 05:34:18,682 INFO  L85        PathProgramCache]: Analyzing trace with hash -1899292210, now seen corresponding path program 1 times
[2021-12-17 05:34:18,683 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-12-17 05:34:18,683 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981988715]
[2021-12-17 05:34:18,683 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-12-17 05:34:18,683 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-12-17 05:34:18,758 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-12-17 05:34:18,827 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-12-17 05:34:18,828 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-12-17 05:34:18,828 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981988715]
[2021-12-17 05:34:18,828 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981988715] provided 1 perfect and 0 imperfect interpolant sequences
[2021-12-17 05:34:18,828 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-12-17 05:34:18,828 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2021-12-17 05:34:18,828 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551297583]
[2021-12-17 05:34:18,829 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-12-17 05:34:18,829 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2021-12-17 05:34:18,829 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-12-17 05:34:18,830 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-12-17 05:34:18,830 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-12-17 05:34:18,830 INFO  L87              Difference]: Start difference. First operand 39707 states and 71915 transitions. Second operand  has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-17 05:34:21,146 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-12-17 05:34:21,146 INFO  L93              Difference]: Finished difference Result 116839 states and 211508 transitions.
[2021-12-17 05:34:21,147 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2021-12-17 05:34:21,147 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37
[2021-12-17 05:34:21,147 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-12-17 05:34:21,374 INFO  L225             Difference]: With dead ends: 116839
[2021-12-17 05:34:21,374 INFO  L226             Difference]: Without dead ends: 77134
[2021-12-17 05:34:21,430 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
[2021-12-17 05:34:21,430 INFO  L933         BasicCegarLoop]: 18302 mSDtfsCounter, 14826 mSDsluCounter, 14948 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 455 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14826 SdHoareTripleChecker+Valid, 33250 SdHoareTripleChecker+Invalid, 967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 455 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time
[2021-12-17 05:34:21,431 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [14826 Valid, 33250 Invalid, 967 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [455 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time]
[2021-12-17 05:34:21,497 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 77134 states.
[2021-12-17 05:34:22,443 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 77134 to 76972.
[2021-12-17 05:34:22,532 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 76972 states, 76870 states have (on average 1.810342136073891) internal successors, (139161), 76969 states have internal predecessors, (139161), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-17 05:34:22,699 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 76972 states to 76972 states and 139261 transitions.
[2021-12-17 05:34:22,699 INFO  L78                 Accepts]: Start accepts. Automaton has 76972 states and 139261 transitions. Word has length 37
[2021-12-17 05:34:22,700 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-12-17 05:34:22,700 INFO  L470      AbstractCegarLoop]: Abstraction has 76972 states and 139261 transitions.
[2021-12-17 05:34:22,700 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-17 05:34:22,700 INFO  L276                IsEmpty]: Start isEmpty. Operand 76972 states and 139261 transitions.
[2021-12-17 05:34:22,703 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 39
[2021-12-17 05:34:22,703 INFO  L506         BasicCegarLoop]: Found error trace
[2021-12-17 05:34:22,703 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-12-17 05:34:22,703 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2021-12-17 05:34:22,704 INFO  L402      AbstractCegarLoop]: === Iteration 6 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-12-17 05:34:22,704 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-12-17 05:34:22,704 INFO  L85        PathProgramCache]: Analyzing trace with hash 1250809940, now seen corresponding path program 1 times
[2021-12-17 05:34:22,704 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-12-17 05:34:22,705 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256047967]
[2021-12-17 05:34:22,705 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-12-17 05:34:22,705 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-12-17 05:34:22,764 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-12-17 05:34:22,818 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-12-17 05:34:22,818 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-12-17 05:34:22,818 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256047967]
[2021-12-17 05:34:22,818 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256047967] provided 1 perfect and 0 imperfect interpolant sequences
[2021-12-17 05:34:22,818 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-12-17 05:34:22,819 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2021-12-17 05:34:22,819 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960737437]
[2021-12-17 05:34:22,819 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-12-17 05:34:22,819 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2021-12-17 05:34:22,819 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-12-17 05:34:22,820 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-12-17 05:34:22,820 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-12-17 05:34:22,820 INFO  L87              Difference]: Start difference. First operand 76972 states and 139261 transitions. Second operand  has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 2 states have internal predecessors, (37), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-17 05:34:24,430 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-12-17 05:34:24,430 INFO  L93              Difference]: Finished difference Result 229406 states and 415055 transitions.
[2021-12-17 05:34:24,433 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2021-12-17 05:34:24,433 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 2 states have internal predecessors, (37), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38
[2021-12-17 05:34:24,433 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-12-17 05:34:24,686 INFO  L225             Difference]: With dead ends: 229406
[2021-12-17 05:34:24,686 INFO  L226             Difference]: Without dead ends: 152436
[2021-12-17 05:34:24,750 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-12-17 05:34:24,751 INFO  L933         BasicCegarLoop]: 16747 mSDtfsCounter, 15326 mSDsluCounter, 15512 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15326 SdHoareTripleChecker+Valid, 32259 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2021-12-17 05:34:24,751 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [15326 Valid, 32259 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time]
[2021-12-17 05:34:24,851 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 152436 states.
[2021-12-17 05:34:26,181 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 152436 to 152328.
[2021-12-17 05:34:26,341 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 152328 states, 152226 states have (on average 1.8099404832288835) internal successors, (275520), 152325 states have internal predecessors, (275520), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-17 05:34:26,683 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 152328 states to 152328 states and 275620 transitions.
[2021-12-17 05:34:26,683 INFO  L78                 Accepts]: Start accepts. Automaton has 152328 states and 275620 transitions. Word has length 38
[2021-12-17 05:34:26,684 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-12-17 05:34:26,684 INFO  L470      AbstractCegarLoop]: Abstraction has 152328 states and 275620 transitions.
[2021-12-17 05:34:26,684 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 2 states have internal predecessors, (37), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-17 05:34:26,685 INFO  L276                IsEmpty]: Start isEmpty. Operand 152328 states and 275620 transitions.
[2021-12-17 05:34:26,690 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 39
[2021-12-17 05:34:26,690 INFO  L506         BasicCegarLoop]: Found error trace
[2021-12-17 05:34:26,691 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-12-17 05:34:26,691 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5
[2021-12-17 05:34:26,691 INFO  L402      AbstractCegarLoop]: === Iteration 7 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-12-17 05:34:26,691 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-12-17 05:34:26,692 INFO  L85        PathProgramCache]: Analyzing trace with hash 1282966305, now seen corresponding path program 1 times
[2021-12-17 05:34:26,692 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-12-17 05:34:26,692 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156560413]
[2021-12-17 05:34:26,692 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-12-17 05:34:26,692 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-12-17 05:34:27,234 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-12-17 05:34:27,343 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-12-17 05:34:27,343 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-12-17 05:34:27,343 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156560413]
[2021-12-17 05:34:27,344 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156560413] provided 1 perfect and 0 imperfect interpolant sequences
[2021-12-17 05:34:27,344 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-12-17 05:34:27,344 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2021-12-17 05:34:27,344 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524487090]
[2021-12-17 05:34:27,344 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-12-17 05:34:27,345 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2021-12-17 05:34:27,345 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-12-17 05:34:27,345 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-12-17 05:34:27,345 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-12-17 05:34:27,346 INFO  L87              Difference]: Start difference. First operand 152328 states and 275620 transitions. Second operand  has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 2 states have internal predecessors, (37), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-17 05:34:29,709 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-12-17 05:34:29,710 INFO  L93              Difference]: Finished difference Result 453996 states and 821418 transitions.
[2021-12-17 05:34:29,710 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2021-12-17 05:34:29,710 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 2 states have internal predecessors, (37), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38
[2021-12-17 05:34:29,710 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-12-17 05:34:30,346 INFO  L225             Difference]: With dead ends: 453996
[2021-12-17 05:34:30,346 INFO  L226             Difference]: Without dead ends: 301670
[2021-12-17 05:34:30,467 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-12-17 05:34:30,468 INFO  L933         BasicCegarLoop]: 15903 mSDtfsCounter, 15467 mSDsluCounter, 15624 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15467 SdHoareTripleChecker+Valid, 31527 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2021-12-17 05:34:30,468 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [15467 Valid, 31527 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time]
[2021-12-17 05:34:30,691 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 301670 states.