/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/product-lines/minepump_spec3_product18.cil.c


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


This is Ultimate 0.1.25-5644d1e-m
[2020-08-18 20:56:15,318 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-08-18 20:56:15,323 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-08-18 20:56:15,366 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-08-18 20:56:15,367 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-08-18 20:56:15,376 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-08-18 20:56:15,378 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-08-18 20:56:15,381 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2020-08-18 20:56:15,384 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-08-18 20:56:15,387 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-08-18 20:56:15,388 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2020-08-18 20:56:15,389 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-08-18 20:56:15,389 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-08-18 20:56:15,392 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-08-18 20:56:15,394 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-08-18 20:56:15,395 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-08-18 20:56:15,397 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-08-18 20:56:15,398 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-08-18 20:56:15,399 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-08-18 20:56:15,405 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-08-18 20:56:15,406 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-08-18 20:56:15,409 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-08-18 20:56:15,410 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-08-18 20:56:15,411 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-08-18 20:56:15,423 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-08-18 20:56:15,424 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-08-18 20:56:15,427 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-08-18 20:56:15,428 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-08-18 20:56:15,428 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-08-18 20:56:15,432 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-08-18 20:56:15,433 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-08-18 20:56:15,433 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-08-18 20:56:15,437 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-08-18 20:56:15,438 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2020-08-18 20:56:15,439 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-08-18 20:56:15,439 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2020-08-18 20:56:15,442 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-08-18 20:56:15,442 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-08-18 20:56:15,443 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2020-08-18 20:56:15,443 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2020-08-18 20:56:15,444 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-08-18 20:56:15,445 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf
[2020-08-18 20:56:15,482 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-08-18 20:56:15,483 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-08-18 20:56:15,485 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-08-18 20:56:15,485 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-08-18 20:56:15,485 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-08-18 20:56:15,485 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-08-18 20:56:15,486 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-08-18 20:56:15,486 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-08-18 20:56:15,486 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-08-18 20:56:15,486 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-08-18 20:56:15,487 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-08-18 20:56:15,487 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-08-18 20:56:15,488 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-08-18 20:56:15,488 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-08-18 20:56:15,488 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-08-18 20:56:15,488 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-08-18 20:56:15,489 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-08-18 20:56:15,489 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-08-18 20:56:15,489 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-08-18 20:56:15,489 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-08-18 20:56:15,490 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-08-18 20:56:15,490 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-08-18 20:56:15,490 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-08-18 20:56:15,490 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-08-18 20:56:15,490 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-08-18 20:56:15,491 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-08-18 20:56:15,491 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-08-18 20:56:15,491 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-08-18 20:56:15,491 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-08-18 20:56:15,491 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=DEEPEST;
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=DEEPEST;
[2020-08-18 20:56:15,773 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2020-08-18 20:56:15,792 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-08-18 20:56:15,804 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-08-18 20:56:15,806 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-08-18 20:56:15,807 INFO  L275        PluginConnector]: CDTParser initialized
[2020-08-18 20:56:15,808 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec3_product18.cil.c
[2020-08-18 20:56:15,870 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fe2ce0547/bfad457c1da24b1dbcbc873c686b0a99/FLAG57302c2d4
[2020-08-18 20:56:16,346 INFO  L306              CDTParser]: Found 1 translation units.
[2020-08-18 20:56:16,347 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec3_product18.cil.c
[2020-08-18 20:56:16,372 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fe2ce0547/bfad457c1da24b1dbcbc873c686b0a99/FLAG57302c2d4
[2020-08-18 20:56:16,722 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fe2ce0547/bfad457c1da24b1dbcbc873c686b0a99
[2020-08-18 20:56:16,731 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-08-18 20:56:16,733 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-08-18 20:56:16,734 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-08-18 20:56:16,735 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-08-18 20:56:16,739 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-08-18 20:56:16,740 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 08:56:16" (1/1) ...
[2020-08-18 20:56:16,743 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76127e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:56:16, skipping insertion in model container
[2020-08-18 20:56:16,744 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 08:56:16" (1/1) ...
[2020-08-18 20:56:16,752 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-08-18 20:56:16,802 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-08-18 20:56:17,268 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-08-18 20:56:17,282 INFO  L203         MainTranslator]: Completed pre-run
[2020-08-18 20:56:17,360 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-08-18 20:56:17,397 INFO  L208         MainTranslator]: Completed translation
[2020-08-18 20:56:17,397 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:56:17 WrapperNode
[2020-08-18 20:56:17,398 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-08-18 20:56:17,398 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-08-18 20:56:17,399 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-08-18 20:56:17,399 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-08-18 20:56:17,416 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:56:17" (1/1) ...
[2020-08-18 20:56:17,417 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:56:17" (1/1) ...
[2020-08-18 20:56:17,436 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:56:17" (1/1) ...
[2020-08-18 20:56:17,437 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:56:17" (1/1) ...
[2020-08-18 20:56:17,471 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:56:17" (1/1) ...
[2020-08-18 20:56:17,485 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:56:17" (1/1) ...
[2020-08-18 20:56:17,491 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:56:17" (1/1) ...
[2020-08-18 20:56:17,499 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-08-18 20:56:17,500 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-08-18 20:56:17,500 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-08-18 20:56:17,500 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-08-18 20:56:17,501 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:56:17" (1/1) ...
No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-08-18 20:56:17,586 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-08-18 20:56:17,586 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-08-18 20:56:17,586 INFO  L138     BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int
[2020-08-18 20:56:17,586 INFO  L138     BoogieDeclarations]: Found implementation of procedure cleanup
[2020-08-18 20:56:17,587 INFO  L138     BoogieDeclarations]: Found implementation of procedure Specification2
[2020-08-18 20:56:17,587 INFO  L138     BoogieDeclarations]: Found implementation of procedure setup
[2020-08-18 20:56:17,587 INFO  L138     BoogieDeclarations]: Found implementation of procedure runTest
[2020-08-18 20:56:17,588 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-08-18 20:56:17,588 INFO  L138     BoogieDeclarations]: Found implementation of procedure lowerWaterLevel
[2020-08-18 20:56:17,588 INFO  L138     BoogieDeclarations]: Found implementation of procedure waterRise
[2020-08-18 20:56:17,589 INFO  L138     BoogieDeclarations]: Found implementation of procedure changeMethaneLevel
[2020-08-18 20:56:17,590 INFO  L138     BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical
[2020-08-18 20:56:17,590 INFO  L138     BoogieDeclarations]: Found implementation of procedure printEnvironment
[2020-08-18 20:56:17,590 INFO  L138     BoogieDeclarations]: Found implementation of procedure getWaterLevel
[2020-08-18 20:56:17,590 INFO  L138     BoogieDeclarations]: Found implementation of procedure isLowWaterSensorDry
[2020-08-18 20:56:17,591 INFO  L138     BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set
[2020-08-18 20:56:17,591 INFO  L138     BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free
[2020-08-18 20:56:17,591 INFO  L138     BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset
[2020-08-18 20:56:17,592 INFO  L138     BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt
[2020-08-18 20:56:17,592 INFO  L138     BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg
[2020-08-18 20:56:17,592 INFO  L138     BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype
[2020-08-18 20:56:17,592 INFO  L138     BoogieDeclarations]: Found implementation of procedure timeShift
[2020-08-18 20:56:17,593 INFO  L138     BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base
[2020-08-18 20:56:17,593 INFO  L138     BoogieDeclarations]: Found implementation of procedure processEnvironment
[2020-08-18 20:56:17,593 INFO  L138     BoogieDeclarations]: Found implementation of procedure activatePump
[2020-08-18 20:56:17,594 INFO  L138     BoogieDeclarations]: Found implementation of procedure deactivatePump
[2020-08-18 20:56:17,594 INFO  L138     BoogieDeclarations]: Found implementation of procedure isMethaneAlarm
[2020-08-18 20:56:17,594 INFO  L138     BoogieDeclarations]: Found implementation of procedure isPumpRunning
[2020-08-18 20:56:17,595 INFO  L138     BoogieDeclarations]: Found implementation of procedure printPump
[2020-08-18 20:56:17,595 INFO  L138     BoogieDeclarations]: Found implementation of procedure isLowWaterLevel
[2020-08-18 20:56:17,595 INFO  L138     BoogieDeclarations]: Found implementation of procedure startSystem
[2020-08-18 20:56:17,595 INFO  L138     BoogieDeclarations]: Found implementation of procedure test
[2020-08-18 20:56:17,595 INFO  L138     BoogieDeclarations]: Found implementation of procedure select_one
[2020-08-18 20:56:17,595 INFO  L138     BoogieDeclarations]: Found implementation of procedure select_features
[2020-08-18 20:56:17,596 INFO  L138     BoogieDeclarations]: Found implementation of procedure select_helpers
[2020-08-18 20:56:17,596 INFO  L138     BoogieDeclarations]: Found implementation of procedure valid_product
[2020-08-18 20:56:17,596 INFO  L138     BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification3_spec__1
[2020-08-18 20:56:17,596 INFO  L138     BoogieDeclarations]: Found implementation of procedure __automaton_fail
[2020-08-18 20:56:17,596 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-08-18 20:56:17,597 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-08-18 20:56:17,597 INFO  L130     BoogieDeclarations]: Found specification of procedure printf
[2020-08-18 20:56:17,597 INFO  L130     BoogieDeclarations]: Found specification of procedure timeShift
[2020-08-18 20:56:17,597 INFO  L130     BoogieDeclarations]: Found specification of procedure cleanup
[2020-08-18 20:56:17,597 INFO  L130     BoogieDeclarations]: Found specification of procedure printPump
[2020-08-18 20:56:17,597 INFO  L130     BoogieDeclarations]: Found specification of procedure waterRise
[2020-08-18 20:56:17,599 INFO  L130     BoogieDeclarations]: Found specification of procedure changeMethaneLevel
[2020-08-18 20:56:17,599 INFO  L130     BoogieDeclarations]: Found specification of procedure Specification2
[2020-08-18 20:56:17,599 INFO  L130     BoogieDeclarations]: Found specification of procedure setup
[2020-08-18 20:56:17,599 INFO  L130     BoogieDeclarations]: Found specification of procedure test
[2020-08-18 20:56:17,599 INFO  L130     BoogieDeclarations]: Found specification of procedure runTest
[2020-08-18 20:56:17,599 INFO  L130     BoogieDeclarations]: Found specification of procedure select_helpers
[2020-08-18 20:56:17,600 INFO  L130     BoogieDeclarations]: Found specification of procedure select_features
[2020-08-18 20:56:17,600 INFO  L130     BoogieDeclarations]: Found specification of procedure valid_product
[2020-08-18 20:56:17,600 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-08-18 20:56:17,600 INFO  L130     BoogieDeclarations]: Found specification of procedure lowerWaterLevel
[2020-08-18 20:56:17,600 INFO  L130     BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical
[2020-08-18 20:56:17,601 INFO  L130     BoogieDeclarations]: Found specification of procedure getWaterLevel
[2020-08-18 20:56:17,601 INFO  L130     BoogieDeclarations]: Found specification of procedure printEnvironment
[2020-08-18 20:56:17,601 INFO  L130     BoogieDeclarations]: Found specification of procedure isLowWaterSensorDry
[2020-08-18 20:56:17,601 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2020-08-18 20:56:17,601 INFO  L130     BoogieDeclarations]: Found specification of procedure __assert_fail
[2020-08-18 20:56:17,602 INFO  L130     BoogieDeclarations]: Found specification of procedure malloc
[2020-08-18 20:56:17,602 INFO  L130     BoogieDeclarations]: Found specification of procedure free
[2020-08-18 20:56:17,602 INFO  L130     BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set
[2020-08-18 20:56:17,602 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap
[2020-08-18 20:56:17,602 INFO  L130     BoogieDeclarations]: Found specification of procedure write~$Pointer$
[2020-08-18 20:56:17,602 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2020-08-18 20:56:17,602 INFO  L130     BoogieDeclarations]: Found specification of procedure read~$Pointer$
[2020-08-18 20:56:17,603 INFO  L130     BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free
[2020-08-18 20:56:17,603 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2020-08-18 20:56:17,603 INFO  L130     BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset
[2020-08-18 20:56:17,603 INFO  L130     BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int
[2020-08-18 20:56:17,604 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2020-08-18 20:56:17,604 INFO  L130     BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt
[2020-08-18 20:56:17,605 INFO  L130     BoogieDeclarations]: Found specification of procedure __utac__get_this_arg
[2020-08-18 20:56:17,605 INFO  L130     BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype
[2020-08-18 20:56:17,607 INFO  L130     BoogieDeclarations]: Found specification of procedure activatePump
[2020-08-18 20:56:17,607 INFO  L130     BoogieDeclarations]: Found specification of procedure deactivatePump
[2020-08-18 20:56:17,607 INFO  L130     BoogieDeclarations]: Found specification of procedure isPumpRunning
[2020-08-18 20:56:17,607 INFO  L130     BoogieDeclarations]: Found specification of procedure startSystem
[2020-08-18 20:56:17,607 INFO  L130     BoogieDeclarations]: Found specification of procedure __utac_acc__Specification3_spec__1
[2020-08-18 20:56:17,607 INFO  L130     BoogieDeclarations]: Found specification of procedure processEnvironment
[2020-08-18 20:56:17,607 INFO  L130     BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base
[2020-08-18 20:56:17,608 INFO  L130     BoogieDeclarations]: Found specification of procedure isLowWaterLevel
[2020-08-18 20:56:17,608 INFO  L130     BoogieDeclarations]: Found specification of procedure isMethaneAlarm
[2020-08-18 20:56:17,608 INFO  L130     BoogieDeclarations]: Found specification of procedure select_one
[2020-08-18 20:56:17,608 INFO  L130     BoogieDeclarations]: Found specification of procedure __automaton_fail
[2020-08-18 20:56:17,609 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-08-18 20:56:17,609 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2020-08-18 20:56:17,609 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-08-18 20:56:18,739 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-08-18 20:56:18,740 INFO  L295             CfgBuilder]: Removed 5 assume(true) statements.
[2020-08-18 20:56:18,745 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 08:56:18 BoogieIcfgContainer
[2020-08-18 20:56:18,745 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-08-18 20:56:18,746 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-08-18 20:56:18,747 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-08-18 20:56:18,750 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-08-18 20:56:18,750 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 08:56:16" (1/3) ...
[2020-08-18 20:56:18,751 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f3d89a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 08:56:18, skipping insertion in model container
[2020-08-18 20:56:18,751 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:56:17" (2/3) ...
[2020-08-18 20:56:18,752 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f3d89a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 08:56:18, skipping insertion in model container
[2020-08-18 20:56:18,752 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 08:56:18" (3/3) ...
[2020-08-18 20:56:18,753 INFO  L109   eAbstractionObserver]: Analyzing ICFG minepump_spec3_product18.cil.c
[2020-08-18 20:56:18,764 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-08-18 20:56:18,772 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-08-18 20:56:18,785 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-08-18 20:56:18,805 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-08-18 20:56:18,805 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-08-18 20:56:18,805 INFO  L377      AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-08-18 20:56:18,805 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-08-18 20:56:18,805 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-08-18 20:56:18,805 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-08-18 20:56:18,805 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-08-18 20:56:18,805 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-08-18 20:56:18,827 INFO  L276                IsEmpty]: Start isEmpty. Operand 160 states.
[2020-08-18 20:56:18,837 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 53
[2020-08-18 20:56:18,837 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 20:56:18,838 INFO  L422         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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-18 20:56:18,839 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 20:56:18,844 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 20:56:18,844 INFO  L82        PathProgramCache]: Analyzing trace with hash 144675927, now seen corresponding path program 1 times
[2020-08-18 20:56:18,852 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 20:56:18,853 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [750627416]
[2020-08-18 20:56:18,853 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 20:56:19,125 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 20:56:19,513 WARN  L193               SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 184
[2020-08-18 20:56:19,515 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 20:56:19,527 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 20:56:19,574 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2020-08-18 20:56:19,575 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 20:56:19,577 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9
[2020-08-18 20:56:19,578 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 20:56:19,580 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12
[2020-08-18 20:56:19,581 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 20:56:19,583 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18
[2020-08-18 20:56:19,584 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 20:56:19,585 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32
[2020-08-18 20:56:19,587 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 20:56:19,589 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38
[2020-08-18 20:56:19,590 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 20:56:19,596 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44
[2020-08-18 20:56:19,597 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 20:56:19,625 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-18 20:56:19,626 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [750627416]
[2020-08-18 20:56:19,628 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 20:56:19,628 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-08-18 20:56:19,629 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905667043]
[2020-08-18 20:56:19,635 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-08-18 20:56:19,636 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 20:56:19,651 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-08-18 20:56:19,652 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-08-18 20:56:19,655 INFO  L87              Difference]: Start difference. First operand 160 states. Second operand 3 states.
[2020-08-18 20:56:20,736 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 20:56:20,736 INFO  L93              Difference]: Finished difference Result 268 states and 351 transitions.
[2020-08-18 20:56:20,737 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-08-18 20:56:20,739 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 52
[2020-08-18 20:56:20,739 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 20:56:20,752 INFO  L225             Difference]: With dead ends: 268
[2020-08-18 20:56:20,752 INFO  L226             Difference]: Without dead ends: 145
[2020-08-18 20:56:20,756 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-08-18 20:56:20,771 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 145 states.
[2020-08-18 20:56:20,835 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 114.
[2020-08-18 20:56:20,837 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 114 states.
[2020-08-18 20:56:20,838 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 132 transitions.
[2020-08-18 20:56:20,841 INFO  L78                 Accepts]: Start accepts. Automaton has 114 states and 132 transitions. Word has length 52
[2020-08-18 20:56:20,841 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 20:56:20,841 INFO  L479      AbstractCegarLoop]: Abstraction has 114 states and 132 transitions.
[2020-08-18 20:56:20,841 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-08-18 20:56:20,842 INFO  L276                IsEmpty]: Start isEmpty. Operand 114 states and 132 transitions.
[2020-08-18 20:56:20,845 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 54
[2020-08-18 20:56:20,845 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 20:56:20,846 INFO  L422         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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-18 20:56:20,846 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-08-18 20:56:20,846 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 20:56:20,847 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 20:56:20,847 INFO  L82        PathProgramCache]: Analyzing trace with hash -274604967, now seen corresponding path program 1 times
[2020-08-18 20:56:20,847 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 20:56:20,848 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [771932326]
[2020-08-18 20:56:20,848 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 20:56:20,910 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 20:56:21,254 WARN  L193               SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 184
[2020-08-18 20:56:21,256 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 20:56:21,261 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 20:56:21,279 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2020-08-18 20:56:21,280 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 20:56:21,281 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9
[2020-08-18 20:56:21,282 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 20:56:21,282 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12
[2020-08-18 20:56:21,283 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 20:56:21,284 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18
[2020-08-18 20:56:21,285 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 20:56:21,286 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33
[2020-08-18 20:56:21,286 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 20:56:21,288 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39
[2020-08-18 20:56:21,288 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 20:56:21,289 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45
[2020-08-18 20:56:21,290 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 20:56:21,297 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-18 20:56:21,298 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [771932326]
[2020-08-18 20:56:21,298 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 20:56:21,298 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-18 20:56:21,299 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78655916]
[2020-08-18 20:56:21,300 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-18 20:56:21,301 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 20:56:21,301 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-18 20:56:21,301 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-18 20:56:21,301 INFO  L87              Difference]: Start difference. First operand 114 states and 132 transitions. Second operand 4 states.
[2020-08-18 20:56:21,698 WARN  L193               SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 187
[2020-08-18 20:56:22,323 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 20:56:22,324 INFO  L93              Difference]: Finished difference Result 197 states and 238 transitions.
[2020-08-18 20:56:22,324 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-08-18 20:56:22,325 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 53
[2020-08-18 20:56:22,325 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 20:56:22,327 INFO  L225             Difference]: With dead ends: 197
[2020-08-18 20:56:22,328 INFO  L226             Difference]: Without dead ends: 129
[2020-08-18 20:56:22,329 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2020-08-18 20:56:22,330 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 129 states.
[2020-08-18 20:56:22,376 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 105.
[2020-08-18 20:56:22,376 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 105 states.
[2020-08-18 20:56:22,377 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 120 transitions.
[2020-08-18 20:56:22,377 INFO  L78                 Accepts]: Start accepts. Automaton has 105 states and 120 transitions. Word has length 53
[2020-08-18 20:56:22,377 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 20:56:22,378 INFO  L479      AbstractCegarLoop]: Abstraction has 105 states and 120 transitions.
[2020-08-18 20:56:22,378 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-18 20:56:22,378 INFO  L276                IsEmpty]: Start isEmpty. Operand 105 states and 120 transitions.
[2020-08-18 20:56:22,383 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 59
[2020-08-18 20:56:22,383 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 20:56:22,383 INFO  L422         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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-18 20:56:22,384 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-08-18 20:56:22,384 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 20:56:22,384 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 20:56:22,384 INFO  L82        PathProgramCache]: Analyzing trace with hash 245025236, now seen corresponding path program 1 times
[2020-08-18 20:56:22,384 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 20:56:22,384 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [235059450]
[2020-08-18 20:56:22,385 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 20:56:22,450 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 20:56:22,752 WARN  L193               SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 184
[2020-08-18 20:56:22,754 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 20:56:22,768 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 20:56:22,795 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2020-08-18 20:56:22,796 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 20:56:22,797 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9
[2020-08-18 20:56:22,798 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 20:56:22,801 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12
[2020-08-18 20:56:22,803 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 20:56:22,820 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18
[2020-08-18 20:56:22,821 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 20:56:22,823 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38
[2020-08-18 20:56:22,824 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 20:56:22,825 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44
[2020-08-18 20:56:22,826 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 20:56:22,828 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50
[2020-08-18 20:56:22,829 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 20:56:22,843 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-18 20:56:22,843 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [235059450]
[2020-08-18 20:56:22,844 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 20:56:22,844 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2020-08-18 20:56:22,845 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744355920]
[2020-08-18 20:56:22,845 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 8 states
[2020-08-18 20:56:22,846 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 20:56:22,849 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2020-08-18 20:56:22,849 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2020-08-18 20:56:22,849 INFO  L87              Difference]: Start difference. First operand 105 states and 120 transitions. Second operand 8 states.
[2020-08-18 20:56:23,209 WARN  L193               SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 186
[2020-08-18 20:56:23,497 WARN  L193               SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 188
[2020-08-18 20:56:23,750 WARN  L193               SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 188
[2020-08-18 20:56:23,981 WARN  L193               SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 188
[2020-08-18 20:56:24,944 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 20:56:24,945 INFO  L93              Difference]: Finished difference Result 210 states and 256 transitions.
[2020-08-18 20:56:24,945 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2020-08-18 20:56:24,946 INFO  L78                 Accepts]: Start accepts. Automaton has 8 states. Word has length 58
[2020-08-18 20:56:24,947 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 20:56:24,948 INFO  L225             Difference]: With dead ends: 210
[2020-08-18 20:56:24,949 INFO  L226             Difference]: Without dead ends: 129
[2020-08-18 20:56:24,950 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132
[2020-08-18 20:56:24,951 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 129 states.
[2020-08-18 20:56:24,979 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 105.
[2020-08-18 20:56:24,980 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 105 states.
[2020-08-18 20:56:24,980 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 119 transitions.
[2020-08-18 20:56:24,981 INFO  L78                 Accepts]: Start accepts. Automaton has 105 states and 119 transitions. Word has length 58
[2020-08-18 20:56:24,981 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 20:56:24,981 INFO  L479      AbstractCegarLoop]: Abstraction has 105 states and 119 transitions.
[2020-08-18 20:56:24,981 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 8 states.
[2020-08-18 20:56:24,981 INFO  L276                IsEmpty]: Start isEmpty. Operand 105 states and 119 transitions.
[2020-08-18 20:56:24,983 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 67
[2020-08-18 20:56:24,983 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 20:56:24,983 INFO  L422         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, 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]
[2020-08-18 20:56:24,983 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-08-18 20:56:24,984 INFO  L427      AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 20:56:24,984 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 20:56:24,984 INFO  L82        PathProgramCache]: Analyzing trace with hash -1490172925, now seen corresponding path program 1 times
[2020-08-18 20:56:24,984 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 20:56:24,985 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1894261196]
[2020-08-18 20:56:24,985 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 20:56:25,011 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 20:56:25,287 WARN  L193               SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 184
[2020-08-18 20:56:25,289 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 20:56:25,304 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 20:56:25,325 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2020-08-18 20:56:25,328 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 20:56:25,330 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9
[2020-08-18 20:56:25,332 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 20:56:25,333 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12
[2020-08-18 20:56:25,334 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 20:56:25,336 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18
[2020-08-18 20:56:25,336 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 20:56:25,345 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36
[2020-08-18 20:56:25,347 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 20:56:25,348 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2020-08-18 20:56:25,348 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 20:56:25,349 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46
[2020-08-18 20:56:25,350 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 20:56:25,351 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52
[2020-08-18 20:56:25,352 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 20:56:25,363 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58
[2020-08-18 20:56:25,364 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 20:56:25,374 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-18 20:56:25,374 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1894261196]
[2020-08-18 20:56:25,374 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 20:56:25,375 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2020-08-18 20:56:25,375 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377361779]
[2020-08-18 20:56:25,375 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 8 states
[2020-08-18 20:56:25,376 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 20:56:25,376 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2020-08-18 20:56:25,376 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2020-08-18 20:56:25,376 INFO  L87              Difference]: Start difference. First operand 105 states and 119 transitions. Second operand 8 states.
[2020-08-18 20:56:25,736 WARN  L193               SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 186
[2020-08-18 20:56:27,022 WARN  L193               SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 188
[2020-08-18 20:56:27,363 WARN  L193               SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 188
[2020-08-18 20:56:27,608 WARN  L193               SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 188
[2020-08-18 20:56:27,865 WARN  L193               SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 186
[2020-08-18 20:56:28,435 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 20:56:28,435 INFO  L93              Difference]: Finished difference Result 314 states and 408 transitions.
[2020-08-18 20:56:28,438 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. 
[2020-08-18 20:56:28,439 INFO  L78                 Accepts]: Start accepts. Automaton has 8 states. Word has length 66
[2020-08-18 20:56:28,440 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 20:56:28,462 INFO  L225             Difference]: With dead ends: 314
[2020-08-18 20:56:28,462 INFO  L226             Difference]: Without dead ends: 233
[2020-08-18 20:56:28,463 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182
[2020-08-18 20:56:28,464 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 233 states.
[2020-08-18 20:56:28,507 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 184.
[2020-08-18 20:56:28,507 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 184 states.
[2020-08-18 20:56:28,508 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 215 transitions.
[2020-08-18 20:56:28,509 INFO  L78                 Accepts]: Start accepts. Automaton has 184 states and 215 transitions. Word has length 66
[2020-08-18 20:56:28,509 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 20:56:28,509 INFO  L479      AbstractCegarLoop]: Abstraction has 184 states and 215 transitions.
[2020-08-18 20:56:28,510 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 8 states.
[2020-08-18 20:56:28,510 INFO  L276                IsEmpty]: Start isEmpty. Operand 184 states and 215 transitions.
[2020-08-18 20:56:28,512 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 71
[2020-08-18 20:56:28,512 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 20:56:28,512 INFO  L422         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, 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]
[2020-08-18 20:56:28,513 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2020-08-18 20:56:28,513 INFO  L427      AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 20:56:28,513 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 20:56:28,513 INFO  L82        PathProgramCache]: Analyzing trace with hash -123378135, now seen corresponding path program 1 times
[2020-08-18 20:56:28,514 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 20:56:28,514 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [145559724]
[2020-08-18 20:56:28,514 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 20:56:28,537 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 20:56:28,791 WARN  L193               SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 184
[2020-08-18 20:56:28,792 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 20:56:28,808 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 20:56:28,841 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2020-08-18 20:56:28,842 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 20:56:28,844 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9
[2020-08-18 20:56:28,845 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 20:56:28,846 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12
[2020-08-18 20:56:28,846 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 20:56:28,848 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18
[2020-08-18 20:56:28,848 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 20:56:28,856 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35
[2020-08-18 20:56:28,857 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 20:56:28,865 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40
[2020-08-18 20:56:28,866 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 20:56:28,867 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2020-08-18 20:56:28,868 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 20:56:28,869 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50
[2020-08-18 20:56:28,870 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 20:56:28,871 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56
[2020-08-18 20:56:28,872 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 20:56:28,873 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62
[2020-08-18 20:56:28,873 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 20:56:28,883 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-18 20:56:28,884 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [145559724]
[2020-08-18 20:56:28,884 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 20:56:28,884 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2020-08-18 20:56:28,885 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140879104]
[2020-08-18 20:56:28,885 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 6 states
[2020-08-18 20:56:28,885 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 20:56:28,886 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2020-08-18 20:56:28,886 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2020-08-18 20:56:28,886 INFO  L87              Difference]: Start difference. First operand 184 states and 215 transitions. Second operand 6 states.
[2020-08-18 20:56:29,206 WARN  L193               SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 186
[2020-08-18 20:56:29,807 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 20:56:29,807 INFO  L93              Difference]: Finished difference Result 306 states and 373 transitions.
[2020-08-18 20:56:29,808 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2020-08-18 20:56:29,808 INFO  L78                 Accepts]: Start accepts. Automaton has 6 states. Word has length 70
[2020-08-18 20:56:29,808 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 20:56:29,810 INFO  L225             Difference]: With dead ends: 306
[2020-08-18 20:56:29,810 INFO  L226             Difference]: Without dead ends: 146
[2020-08-18 20:56:29,812 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72
[2020-08-18 20:56:29,813 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 146 states.
[2020-08-18 20:56:29,839 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 133.
[2020-08-18 20:56:29,839 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 133 states.
[2020-08-18 20:56:29,840 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 148 transitions.
[2020-08-18 20:56:29,841 INFO  L78                 Accepts]: Start accepts. Automaton has 133 states and 148 transitions. Word has length 70
[2020-08-18 20:56:29,841 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 20:56:29,841 INFO  L479      AbstractCegarLoop]: Abstraction has 133 states and 148 transitions.
[2020-08-18 20:56:29,841 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 6 states.
[2020-08-18 20:56:29,841 INFO  L276                IsEmpty]: Start isEmpty. Operand 133 states and 148 transitions.
[2020-08-18 20:56:29,843 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 71
[2020-08-18 20:56:29,843 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 20:56:29,843 INFO  L422         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, 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]
[2020-08-18 20:56:29,843 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2020-08-18 20:56:29,844 INFO  L427      AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 20:56:29,844 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 20:56:29,844 INFO  L82        PathProgramCache]: Analyzing trace with hash 2126179389, now seen corresponding path program 1 times
[2020-08-18 20:56:29,844 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 20:56:29,844 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [373692259]
[2020-08-18 20:56:29,845 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 20:56:29,901 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2020-08-18 20:56:29,906 INFO  L174   FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace
[2020-08-18 20:56:29,906 INFO  L520         BasicCegarLoop]: Counterexample might be feasible
[2020-08-18 20:56:29,910 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5
[2020-08-18 20:56:29,933 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 08:56:29 BoogieIcfgContainer
[2020-08-18 20:56:29,934 INFO  L132        PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-08-18 20:56:29,936 INFO  L168              Benchmark]: Toolchain (without parser) took 13202.62 ms. Allocated memory was 141.6 MB in the beginning and 485.5 MB in the end (delta: 343.9 MB). Free memory was 101.9 MB in the beginning and 419.1 MB in the end (delta: -317.2 MB). Peak memory consumption was 26.8 MB. Max. memory is 7.1 GB.
[2020-08-18 20:56:29,937 INFO  L168              Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 141.6 MB. Free memory was 121.9 MB in the beginning and 121.4 MB in the end (delta: 419.4 kB). Peak memory consumption was 419.4 kB. Max. memory is 7.1 GB.
[2020-08-18 20:56:29,938 INFO  L168              Benchmark]: CACSL2BoogieTranslator took 663.68 ms. Allocated memory was 141.6 MB in the beginning and 204.5 MB in the end (delta: 62.9 MB). Free memory was 101.9 MB in the beginning and 172.4 MB in the end (delta: -70.5 MB). Peak memory consumption was 24.4 MB. Max. memory is 7.1 GB.
[2020-08-18 20:56:29,938 INFO  L168              Benchmark]: Boogie Preprocessor took 101.05 ms. Allocated memory is still 204.5 MB. Free memory was 172.4 MB in the beginning and 167.8 MB in the end (delta: 4.6 MB). Peak memory consumption was 4.6 MB. Max. memory is 7.1 GB.
[2020-08-18 20:56:29,939 INFO  L168              Benchmark]: RCFGBuilder took 1245.40 ms. Allocated memory was 204.5 MB in the beginning and 233.8 MB in the end (delta: 29.4 MB). Free memory was 167.8 MB in the beginning and 191.7 MB in the end (delta: -23.9 MB). Peak memory consumption was 79.1 MB. Max. memory is 7.1 GB.
[2020-08-18 20:56:29,940 INFO  L168              Benchmark]: TraceAbstraction took 11187.31 ms. Allocated memory was 233.8 MB in the beginning and 485.5 MB in the end (delta: 251.7 MB). Free memory was 191.7 MB in the beginning and 419.1 MB in the end (delta: -227.4 MB). Peak memory consumption was 24.3 MB. Max. memory is 7.1 GB.
[2020-08-18 20:56:29,944 INFO  L336   ainManager$Toolchain]: #######################  End [Toolchain 1] #######################
 --- Results ---
 * Results from de.uni_freiburg.informatik.ultimate.core:
  - StatisticsResult: Toolchain Benchmarks
    Benchmark results are:
 * CDTParser took 0.18 ms. Allocated memory is still 141.6 MB. Free memory was 121.9 MB in the beginning and 121.4 MB in the end (delta: 419.4 kB). Peak memory consumption was 419.4 kB. Max. memory is 7.1 GB.
 * CACSL2BoogieTranslator took 663.68 ms. Allocated memory was 141.6 MB in the beginning and 204.5 MB in the end (delta: 62.9 MB). Free memory was 101.9 MB in the beginning and 172.4 MB in the end (delta: -70.5 MB). Peak memory consumption was 24.4 MB. Max. memory is 7.1 GB.
 * Boogie Preprocessor took 101.05 ms. Allocated memory is still 204.5 MB. Free memory was 172.4 MB in the beginning and 167.8 MB in the end (delta: 4.6 MB). Peak memory consumption was 4.6 MB. Max. memory is 7.1 GB.
 * RCFGBuilder took 1245.40 ms. Allocated memory was 204.5 MB in the beginning and 233.8 MB in the end (delta: 29.4 MB). Free memory was 167.8 MB in the beginning and 191.7 MB in the end (delta: -23.9 MB). Peak memory consumption was 79.1 MB. Max. memory is 7.1 GB.
 * TraceAbstraction took 11187.31 ms. Allocated memory was 233.8 MB in the beginning and 485.5 MB in the end (delta: 251.7 MB). Free memory was 191.7 MB in the beginning and 419.1 MB in the end (delta: -227.4 MB). Peak memory consumption was 24.3 MB. Max. memory is 7.1 GB.
 * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
  - CounterExampleResult [Line: 910]: a call of __VERIFIER_error() is reachable
    a call of __VERIFIER_error() is reachable
We found a FailurePath: 
[L40]               int cleanupTimeShifts  =    4;
[L149]              int waterLevel  =    1;
[L150]              int methaneLevelCritical  =    0;
[L407]              static struct __ACC__ERR *head  =    (struct __ACC__ERR *)0;
[L608]              int pumpRunning  =    0;
[L609]              int systemActive  =    1;
[L121]              int retValue_acc ;
[L122]              int tmp ;
[L126]  FCALL       select_helpers()
[L127]  FCALL       select_features()
[L128]  CALL, EXPR  valid_product()
[L862]              int retValue_acc ;
[L865]              retValue_acc = 1
[L866]              return (retValue_acc);
[L128]  RET, EXPR   valid_product()
[L128]              tmp = valid_product()
[L130]  COND TRUE   \read(tmp)
[L132]  FCALL       setup()
[L133]  CALL        runTest()
[L112]  CALL        test()
[L770]              int splverifierCounter ;
[L771]              int tmp ;
[L772]              int tmp___0 ;
[L773]              int tmp___1 ;
[L774]              int tmp___2 ;
[L777]              splverifierCounter = 0
[L779]  COND TRUE   1
[L781]  COND TRUE   splverifierCounter < 4
[L787]              tmp = __VERIFIER_nondet_int()
[L789]  COND TRUE   \read(tmp)
[L791]  CALL        waterRise()
[L167]  COND TRUE   waterLevel < 2
[L168]              waterLevel = waterLevel + 1
[L791]  RET         waterRise()
[L797]              tmp___0 = __VERIFIER_nondet_int()
[L799]  COND FALSE  !(\read(tmp___0))
[L807]              tmp___2 = __VERIFIER_nondet_int()
[L809]  COND FALSE  !(\read(tmp___2))
[L815]              tmp___1 = __VERIFIER_nondet_int()
[L817]  COND TRUE   \read(tmp___1)
[L824]  CALL        timeShift()
[L616]  COND FALSE  !(\read(pumpRunning))
[L623]  COND TRUE   \read(systemActive)
[L625]  CALL        processEnvironment()
[L645]              int tmp ;
[L648]  COND FALSE  !(\read(pumpRunning))
[L663]  FCALL       processEnvironment__wrappee__base()
[L625]  RET         processEnvironment()
[L631]  CALL        __utac_acc__Specification3_spec__1()
[L873]              int tmp ;
[L874]              int tmp___0 ;
[L875]              int tmp___1 ;
[L879]  CALL, EXPR  isMethaneLevelCritical()
[L188]              int retValue_acc ;
[L191]              retValue_acc = methaneLevelCritical
[L192]              return (retValue_acc);
[L879]  RET, EXPR   isMethaneLevelCritical()
[L879]              tmp = isMethaneLevelCritical()
[L881]  COND FALSE  !(\read(tmp))
[L885]  CALL, EXPR  getWaterLevel()
[L220]              int retValue_acc ;
[L223]              retValue_acc = waterLevel
[L224]              return (retValue_acc);
[L885]  RET, EXPR   getWaterLevel()
[L885]              tmp___0 = getWaterLevel()
[L887]  COND TRUE   tmp___0 == 2
[L889]  CALL, EXPR  isPumpRunning()
[L697]              int retValue_acc ;
[L700]              retValue_acc = pumpRunning
[L701]              return (retValue_acc);
[L889]  RET, EXPR   isPumpRunning()
[L889]              tmp___1 = isPumpRunning()
[L891]  COND FALSE  !(\read(tmp___1))
[L895]  CALL        __automaton_fail()
[L910]              __VERIFIER_error()

  - StatisticsResult: Ultimate Automizer benchmark data
    CFG has 38 procedures, 221 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 11.1s, OverallIterations: 6, TraceHistogramMax: 1, AutomataDifference: 8.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 466 SDtfs, 633 SDslu, 262 SDs, 0 SdLazy, 1390 SolverSat, 396 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 134 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 3.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=184occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 5 MinimizatonAttempts, 141 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.9s InterpolantComputationTime, 369 NumberOfCodeBlocks, 369 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 294 ConstructedInterpolants, 0 QuantifiedInterpolants, 83938 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available
RESULT: Ultimate proved your program to be incorrect!
Received shutdown request...