/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=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/product-lines/minepump_spec3_product26.cil.c


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


This is Ultimate 0.1.25-177f698
[2020-08-21 20:23:46,003 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-08-21 20:23:46,006 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-08-21 20:23:46,050 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-08-21 20:23:46,051 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-08-21 20:23:46,064 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-08-21 20:23:46,065 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-08-21 20:23:46,068 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2020-08-21 20:23:46,070 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-08-21 20:23:46,073 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-08-21 20:23:46,074 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2020-08-21 20:23:46,078 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-08-21 20:23:46,078 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-08-21 20:23:46,079 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-08-21 20:23:46,082 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-08-21 20:23:46,084 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-08-21 20:23:46,084 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-08-21 20:23:46,088 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-08-21 20:23:46,090 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-08-21 20:23:46,094 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-08-21 20:23:46,095 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-08-21 20:23:46,096 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-08-21 20:23:46,097 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-08-21 20:23:46,098 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-08-21 20:23:46,100 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-08-21 20:23:46,100 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-08-21 20:23:46,100 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-08-21 20:23:46,101 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-08-21 20:23:46,102 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-08-21 20:23:46,102 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-08-21 20:23:46,103 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-08-21 20:23:46,103 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-08-21 20:23:46,104 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-08-21 20:23:46,105 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2020-08-21 20:23:46,106 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-08-21 20:23:46,106 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2020-08-21 20:23:46,106 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-08-21 20:23:46,107 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-08-21 20:23:46,107 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2020-08-21 20:23:46,108 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2020-08-21 20:23:46,108 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-08-21 20:23:46,109 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
[2020-08-21 20:23:46,132 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-08-21 20:23:46,132 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-08-21 20:23:46,133 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-08-21 20:23:46,134 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-08-21 20:23:46,134 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-08-21 20:23:46,134 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-08-21 20:23:46,134 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-08-21 20:23:46,135 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-08-21 20:23:46,135 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-08-21 20:23:46,135 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-08-21 20:23:46,135 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-08-21 20:23:46,135 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-08-21 20:23:46,136 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-08-21 20:23:46,136 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-08-21 20:23:46,136 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-08-21 20:23:46,136 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-08-21 20:23:46,136 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-08-21 20:23:46,137 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-08-21 20:23:46,137 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-08-21 20:23:46,137 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-08-21 20:23:46,137 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-08-21 20:23:46,137 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-08-21 20:23:46,138 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-08-21 20:23:46,138 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-08-21 20:23:46,138 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-08-21 20:23:46,138 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-08-21 20:23:46,138 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-08-21 20:23:46,139 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-08-21 20:23:46,139 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-08-21 20:23:46,139 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=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;
[2020-08-21 20:23:46,452 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2020-08-21 20:23:46,465 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-08-21 20:23:46,469 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-08-21 20:23:46,471 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-08-21 20:23:46,472 INFO  L275        PluginConnector]: CDTParser initialized
[2020-08-21 20:23:46,472 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec3_product26.cil.c
[2020-08-21 20:23:46,560 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ec2309b7d/dd3ff61b122b40079587c3e85ad24d7c/FLAG5f7696d63
[2020-08-21 20:23:47,165 INFO  L306              CDTParser]: Found 1 translation units.
[2020-08-21 20:23:47,168 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec3_product26.cil.c
[2020-08-21 20:23:47,185 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ec2309b7d/dd3ff61b122b40079587c3e85ad24d7c/FLAG5f7696d63
[2020-08-21 20:23:47,424 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ec2309b7d/dd3ff61b122b40079587c3e85ad24d7c
[2020-08-21 20:23:47,432 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-08-21 20:23:47,433 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-08-21 20:23:47,434 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-08-21 20:23:47,434 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-08-21 20:23:47,438 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-08-21 20:23:47,439 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 08:23:47" (1/1) ...
[2020-08-21 20:23:47,442 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b8831ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:23:47, skipping insertion in model container
[2020-08-21 20:23:47,442 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 08:23:47" (1/1) ...
[2020-08-21 20:23:47,450 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-08-21 20:23:47,518 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-08-21 20:23:47,988 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-08-21 20:23:48,001 INFO  L203         MainTranslator]: Completed pre-run
[2020-08-21 20:23:48,131 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-08-21 20:23:48,174 INFO  L208         MainTranslator]: Completed translation
[2020-08-21 20:23:48,176 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:23:48 WrapperNode
[2020-08-21 20:23:48,176 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-08-21 20:23:48,177 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-08-21 20:23:48,177 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-08-21 20:23:48,177 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-08-21 20:23:48,188 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:23:48" (1/1) ...
[2020-08-21 20:23:48,189 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:23:48" (1/1) ...
[2020-08-21 20:23:48,208 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:23:48" (1/1) ...
[2020-08-21 20:23:48,208 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:23:48" (1/1) ...
[2020-08-21 20:23:48,237 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:23:48" (1/1) ...
[2020-08-21 20:23:48,247 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:23:48" (1/1) ...
[2020-08-21 20:23:48,253 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:23:48" (1/1) ...
[2020-08-21 20:23:48,261 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-08-21 20:23:48,261 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-08-21 20:23:48,261 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-08-21 20:23:48,262 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-08-21 20:23:48,263 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:23:48" (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
[2020-08-21 20:23:48,324 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-08-21 20:23:48,324 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-08-21 20:23:48,324 INFO  L138     BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int
[2020-08-21 20:23:48,325 INFO  L138     BoogieDeclarations]: Found implementation of procedure cleanup
[2020-08-21 20:23:48,325 INFO  L138     BoogieDeclarations]: Found implementation of procedure Specification2
[2020-08-21 20:23:48,325 INFO  L138     BoogieDeclarations]: Found implementation of procedure setup
[2020-08-21 20:23:48,325 INFO  L138     BoogieDeclarations]: Found implementation of procedure runTest
[2020-08-21 20:23:48,325 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-08-21 20:23:48,325 INFO  L138     BoogieDeclarations]: Found implementation of procedure select_one
[2020-08-21 20:23:48,326 INFO  L138     BoogieDeclarations]: Found implementation of procedure select_features
[2020-08-21 20:23:48,326 INFO  L138     BoogieDeclarations]: Found implementation of procedure select_helpers
[2020-08-21 20:23:48,326 INFO  L138     BoogieDeclarations]: Found implementation of procedure valid_product
[2020-08-21 20:23:48,326 INFO  L138     BoogieDeclarations]: Found implementation of procedure lowerWaterLevel
[2020-08-21 20:23:48,326 INFO  L138     BoogieDeclarations]: Found implementation of procedure waterRise
[2020-08-21 20:23:48,326 INFO  L138     BoogieDeclarations]: Found implementation of procedure changeMethaneLevel
[2020-08-21 20:23:48,327 INFO  L138     BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical
[2020-08-21 20:23:48,327 INFO  L138     BoogieDeclarations]: Found implementation of procedure printEnvironment
[2020-08-21 20:23:48,327 INFO  L138     BoogieDeclarations]: Found implementation of procedure getWaterLevel
[2020-08-21 20:23:48,327 INFO  L138     BoogieDeclarations]: Found implementation of procedure isLowWaterSensorDry
[2020-08-21 20:23:48,327 INFO  L138     BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set
[2020-08-21 20:23:48,327 INFO  L138     BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free
[2020-08-21 20:23:48,328 INFO  L138     BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset
[2020-08-21 20:23:48,328 INFO  L138     BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt
[2020-08-21 20:23:48,328 INFO  L138     BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg
[2020-08-21 20:23:48,328 INFO  L138     BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype
[2020-08-21 20:23:48,328 INFO  L138     BoogieDeclarations]: Found implementation of procedure __automaton_fail
[2020-08-21 20:23:48,328 INFO  L138     BoogieDeclarations]: Found implementation of procedure timeShift
[2020-08-21 20:23:48,329 INFO  L138     BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base
[2020-08-21 20:23:48,329 INFO  L138     BoogieDeclarations]: Found implementation of procedure processEnvironment
[2020-08-21 20:23:48,329 INFO  L138     BoogieDeclarations]: Found implementation of procedure activatePump__wrappee__lowWaterSensor
[2020-08-21 20:23:48,329 INFO  L138     BoogieDeclarations]: Found implementation of procedure activatePump
[2020-08-21 20:23:48,329 INFO  L138     BoogieDeclarations]: Found implementation of procedure deactivatePump
[2020-08-21 20:23:48,329 INFO  L138     BoogieDeclarations]: Found implementation of procedure isMethaneAlarm
[2020-08-21 20:23:48,330 INFO  L138     BoogieDeclarations]: Found implementation of procedure isPumpRunning
[2020-08-21 20:23:48,330 INFO  L138     BoogieDeclarations]: Found implementation of procedure printPump
[2020-08-21 20:23:48,330 INFO  L138     BoogieDeclarations]: Found implementation of procedure isLowWaterLevel
[2020-08-21 20:23:48,330 INFO  L138     BoogieDeclarations]: Found implementation of procedure startSystem
[2020-08-21 20:23:48,330 INFO  L138     BoogieDeclarations]: Found implementation of procedure test
[2020-08-21 20:23:48,330 INFO  L138     BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification3_spec__1
[2020-08-21 20:23:48,330 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-08-21 20:23:48,331 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-08-21 20:23:48,331 INFO  L130     BoogieDeclarations]: Found specification of procedure printf
[2020-08-21 20:23:48,331 INFO  L130     BoogieDeclarations]: Found specification of procedure timeShift
[2020-08-21 20:23:48,331 INFO  L130     BoogieDeclarations]: Found specification of procedure cleanup
[2020-08-21 20:23:48,331 INFO  L130     BoogieDeclarations]: Found specification of procedure printPump
[2020-08-21 20:23:48,331 INFO  L130     BoogieDeclarations]: Found specification of procedure waterRise
[2020-08-21 20:23:48,332 INFO  L130     BoogieDeclarations]: Found specification of procedure changeMethaneLevel
[2020-08-21 20:23:48,332 INFO  L130     BoogieDeclarations]: Found specification of procedure Specification2
[2020-08-21 20:23:48,332 INFO  L130     BoogieDeclarations]: Found specification of procedure setup
[2020-08-21 20:23:48,332 INFO  L130     BoogieDeclarations]: Found specification of procedure test
[2020-08-21 20:23:48,332 INFO  L130     BoogieDeclarations]: Found specification of procedure runTest
[2020-08-21 20:23:48,332 INFO  L130     BoogieDeclarations]: Found specification of procedure select_helpers
[2020-08-21 20:23:48,332 INFO  L130     BoogieDeclarations]: Found specification of procedure select_features
[2020-08-21 20:23:48,333 INFO  L130     BoogieDeclarations]: Found specification of procedure valid_product
[2020-08-21 20:23:48,333 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-08-21 20:23:48,333 INFO  L130     BoogieDeclarations]: Found specification of procedure select_one
[2020-08-21 20:23:48,333 INFO  L130     BoogieDeclarations]: Found specification of procedure lowerWaterLevel
[2020-08-21 20:23:48,333 INFO  L130     BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical
[2020-08-21 20:23:48,333 INFO  L130     BoogieDeclarations]: Found specification of procedure getWaterLevel
[2020-08-21 20:23:48,334 INFO  L130     BoogieDeclarations]: Found specification of procedure printEnvironment
[2020-08-21 20:23:48,334 INFO  L130     BoogieDeclarations]: Found specification of procedure isLowWaterSensorDry
[2020-08-21 20:23:48,334 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2020-08-21 20:23:48,334 INFO  L130     BoogieDeclarations]: Found specification of procedure __assert_fail
[2020-08-21 20:23:48,334 INFO  L130     BoogieDeclarations]: Found specification of procedure malloc
[2020-08-21 20:23:48,334 INFO  L130     BoogieDeclarations]: Found specification of procedure free
[2020-08-21 20:23:48,335 INFO  L130     BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set
[2020-08-21 20:23:48,335 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap
[2020-08-21 20:23:48,335 INFO  L130     BoogieDeclarations]: Found specification of procedure write~$Pointer$
[2020-08-21 20:23:48,335 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2020-08-21 20:23:48,335 INFO  L130     BoogieDeclarations]: Found specification of procedure read~$Pointer$
[2020-08-21 20:23:48,335 INFO  L130     BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free
[2020-08-21 20:23:48,335 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2020-08-21 20:23:48,336 INFO  L130     BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset
[2020-08-21 20:23:48,336 INFO  L130     BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int
[2020-08-21 20:23:48,336 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2020-08-21 20:23:48,336 INFO  L130     BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt
[2020-08-21 20:23:48,336 INFO  L130     BoogieDeclarations]: Found specification of procedure __utac__get_this_arg
[2020-08-21 20:23:48,336 INFO  L130     BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype
[2020-08-21 20:23:48,337 INFO  L130     BoogieDeclarations]: Found specification of procedure __automaton_fail
[2020-08-21 20:23:48,337 INFO  L130     BoogieDeclarations]: Found specification of procedure activatePump
[2020-08-21 20:23:48,337 INFO  L130     BoogieDeclarations]: Found specification of procedure deactivatePump
[2020-08-21 20:23:48,337 INFO  L130     BoogieDeclarations]: Found specification of procedure isPumpRunning
[2020-08-21 20:23:48,337 INFO  L130     BoogieDeclarations]: Found specification of procedure startSystem
[2020-08-21 20:23:48,337 INFO  L130     BoogieDeclarations]: Found specification of procedure __utac_acc__Specification3_spec__1
[2020-08-21 20:23:48,338 INFO  L130     BoogieDeclarations]: Found specification of procedure processEnvironment
[2020-08-21 20:23:48,338 INFO  L130     BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base
[2020-08-21 20:23:48,338 INFO  L130     BoogieDeclarations]: Found specification of procedure isLowWaterLevel
[2020-08-21 20:23:48,338 INFO  L130     BoogieDeclarations]: Found specification of procedure activatePump__wrappee__lowWaterSensor
[2020-08-21 20:23:48,338 INFO  L130     BoogieDeclarations]: Found specification of procedure isMethaneAlarm
[2020-08-21 20:23:48,338 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-08-21 20:23:48,338 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2020-08-21 20:23:48,339 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-08-21 20:23:49,541 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-08-21 20:23:49,541 INFO  L295             CfgBuilder]: Removed 5 assume(true) statements.
[2020-08-21 20:23:49,549 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 08:23:49 BoogieIcfgContainer
[2020-08-21 20:23:49,550 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-08-21 20:23:49,551 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-08-21 20:23:49,551 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-08-21 20:23:49,555 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-08-21 20:23:49,555 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 08:23:47" (1/3) ...
[2020-08-21 20:23:49,556 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@100ef9e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 08:23:49, skipping insertion in model container
[2020-08-21 20:23:49,557 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:23:48" (2/3) ...
[2020-08-21 20:23:49,557 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@100ef9e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 08:23:49, skipping insertion in model container
[2020-08-21 20:23:49,557 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 08:23:49" (3/3) ...
[2020-08-21 20:23:49,560 INFO  L109   eAbstractionObserver]: Analyzing ICFG minepump_spec3_product26.cil.c
[2020-08-21 20:23:49,571 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-08-21 20:23:49,578 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-08-21 20:23:49,589 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-08-21 20:23:49,609 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-08-21 20:23:49,610 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-08-21 20:23:49,610 INFO  L377      AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-08-21 20:23:49,610 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-08-21 20:23:49,610 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-08-21 20:23:49,611 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-08-21 20:23:49,611 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-08-21 20:23:49,611 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-08-21 20:23:49,633 INFO  L276                IsEmpty]: Start isEmpty. Operand 168 states.
[2020-08-21 20:23:49,643 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 53
[2020-08-21 20:23:49,643 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-21 20:23:49,645 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]
[2020-08-21 20:23:49,645 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 20:23:49,651 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 20:23:49,652 INFO  L82        PathProgramCache]: Analyzing trace with hash 1563256651, now seen corresponding path program 1 times
[2020-08-21 20:23:49,660 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 20:23:49,661 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1661047805]
[2020-08-21 20:23:49,661 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 20:23:49,986 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 20:23:50,432 WARN  L193               SmtUtils]: Spent 311.00 ms on a formula simplification that was a NOOP. DAG size: 184
[2020-08-21 20:23:50,433 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 20:23:50,444 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 20:23:50,500 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2020-08-21 20:23:50,501 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 20:23:50,507 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9
[2020-08-21 20:23:50,513 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 20:23:50,515 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12
[2020-08-21 20:23:50,518 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 20:23:50,523 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18
[2020-08-21 20:23:50,524 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 20:23:50,526 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32
[2020-08-21 20:23:50,529 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 20:23:50,530 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38
[2020-08-21 20:23:50,533 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 20:23:50,537 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44
[2020-08-21 20:23:50,538 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 20:23:50,565 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-21 20:23:50,567 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1661047805]
[2020-08-21 20:23:50,569 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-21 20:23:50,570 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-08-21 20:23:50,571 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423056370]
[2020-08-21 20:23:50,579 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-08-21 20:23:50,580 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 20:23:50,598 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-08-21 20:23:50,599 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-08-21 20:23:50,602 INFO  L87              Difference]: Start difference. First operand 168 states. Second operand 3 states.
[2020-08-21 20:23:51,742 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-21 20:23:51,742 INFO  L93              Difference]: Finished difference Result 268 states and 351 transitions.
[2020-08-21 20:23:51,744 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-08-21 20:23:51,745 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 52
[2020-08-21 20:23:51,746 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-21 20:23:51,767 INFO  L225             Difference]: With dead ends: 268
[2020-08-21 20:23:51,767 INFO  L226             Difference]: Without dead ends: 145
[2020-08-21 20:23:51,775 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-08-21 20:23:51,796 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 145 states.
[2020-08-21 20:23:51,866 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 114.
[2020-08-21 20:23:51,867 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 114 states.
[2020-08-21 20:23:51,870 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 132 transitions.
[2020-08-21 20:23:51,872 INFO  L78                 Accepts]: Start accepts. Automaton has 114 states and 132 transitions. Word has length 52
[2020-08-21 20:23:51,872 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-21 20:23:51,872 INFO  L479      AbstractCegarLoop]: Abstraction has 114 states and 132 transitions.
[2020-08-21 20:23:51,872 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-08-21 20:23:51,873 INFO  L276                IsEmpty]: Start isEmpty. Operand 114 states and 132 transitions.
[2020-08-21 20:23:51,876 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 54
[2020-08-21 20:23:51,877 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-21 20:23:51,877 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]
[2020-08-21 20:23:51,877 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-08-21 20:23:51,877 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 20:23:51,878 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 20:23:51,878 INFO  L82        PathProgramCache]: Analyzing trace with hash 129011283, now seen corresponding path program 1 times
[2020-08-21 20:23:51,878 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 20:23:51,878 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [385707210]
[2020-08-21 20:23:51,879 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 20:23:51,924 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 20:23:52,198 WARN  L193               SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 184
[2020-08-21 20:23:52,200 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 20:23:52,205 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 20:23:52,223 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2020-08-21 20:23:52,224 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 20:23:52,225 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9
[2020-08-21 20:23:52,226 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 20:23:52,226 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12
[2020-08-21 20:23:52,227 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 20:23:52,228 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18
[2020-08-21 20:23:52,229 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 20:23:52,230 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33
[2020-08-21 20:23:52,230 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 20:23:52,231 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39
[2020-08-21 20:23:52,232 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 20:23:52,233 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45
[2020-08-21 20:23:52,234 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 20:23:52,241 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-21 20:23:52,242 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [385707210]
[2020-08-21 20:23:52,242 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-21 20:23:52,242 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-21 20:23:52,242 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817027348]
[2020-08-21 20:23:52,244 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-21 20:23:52,245 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 20:23:52,245 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-21 20:23:52,245 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-21 20:23:52,245 INFO  L87              Difference]: Start difference. First operand 114 states and 132 transitions. Second operand 4 states.
[2020-08-21 20:23:52,688 WARN  L193               SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 187
[2020-08-21 20:23:53,392 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-21 20:23:53,393 INFO  L93              Difference]: Finished difference Result 197 states and 238 transitions.
[2020-08-21 20:23:53,393 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-08-21 20:23:53,394 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 53
[2020-08-21 20:23:53,394 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-21 20:23:53,396 INFO  L225             Difference]: With dead ends: 197
[2020-08-21 20:23:53,396 INFO  L226             Difference]: Without dead ends: 129
[2020-08-21 20:23:53,398 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
[2020-08-21 20:23:53,399 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 129 states.
[2020-08-21 20:23:53,432 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 105.
[2020-08-21 20:23:53,432 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 105 states.
[2020-08-21 20:23:53,434 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 120 transitions.
[2020-08-21 20:23:53,434 INFO  L78                 Accepts]: Start accepts. Automaton has 105 states and 120 transitions. Word has length 53
[2020-08-21 20:23:53,434 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-21 20:23:53,434 INFO  L479      AbstractCegarLoop]: Abstraction has 105 states and 120 transitions.
[2020-08-21 20:23:53,434 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-21 20:23:53,435 INFO  L276                IsEmpty]: Start isEmpty. Operand 105 states and 120 transitions.
[2020-08-21 20:23:53,437 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 59
[2020-08-21 20:23:53,437 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-21 20:23:53,437 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]
[2020-08-21 20:23:53,437 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-08-21 20:23:53,437 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 20:23:53,438 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 20:23:53,438 INFO  L82        PathProgramCache]: Analyzing trace with hash 1511338084, now seen corresponding path program 1 times
[2020-08-21 20:23:53,438 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 20:23:53,438 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1109298269]
[2020-08-21 20:23:53,439 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 20:23:53,469 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 20:23:53,740 WARN  L193               SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 184
[2020-08-21 20:23:53,742 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 20:23:53,757 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 20:23:53,829 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2020-08-21 20:23:53,830 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 20:23:53,833 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9
[2020-08-21 20:23:53,833 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 20:23:53,837 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12
[2020-08-21 20:23:53,838 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 20:23:53,855 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18
[2020-08-21 20:23:53,857 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 20:23:53,858 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38
[2020-08-21 20:23:53,859 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 20:23:53,860 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44
[2020-08-21 20:23:53,861 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 20:23:53,862 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50
[2020-08-21 20:23:53,862 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 20:23:53,871 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-21 20:23:53,871 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1109298269]
[2020-08-21 20:23:53,872 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-21 20:23:53,872 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2020-08-21 20:23:53,872 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296480611]
[2020-08-21 20:23:53,873 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 8 states
[2020-08-21 20:23:53,873 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 20:23:53,873 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2020-08-21 20:23:53,874 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2020-08-21 20:23:53,874 INFO  L87              Difference]: Start difference. First operand 105 states and 120 transitions. Second operand 8 states.
[2020-08-21 20:23:54,276 WARN  L193               SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 186
[2020-08-21 20:23:54,562 WARN  L193               SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 188
[2020-08-21 20:23:54,812 WARN  L193               SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 188
[2020-08-21 20:23:55,048 WARN  L193               SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 188
[2020-08-21 20:23:56,014 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-21 20:23:56,015 INFO  L93              Difference]: Finished difference Result 210 states and 256 transitions.
[2020-08-21 20:23:56,021 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2020-08-21 20:23:56,021 INFO  L78                 Accepts]: Start accepts. Automaton has 8 states. Word has length 58
[2020-08-21 20:23:56,022 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-21 20:23:56,024 INFO  L225             Difference]: With dead ends: 210
[2020-08-21 20:23:56,024 INFO  L226             Difference]: Without dead ends: 129
[2020-08-21 20:23:56,025 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
[2020-08-21 20:23:56,026 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 129 states.
[2020-08-21 20:23:56,054 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 105.
[2020-08-21 20:23:56,054 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 105 states.
[2020-08-21 20:23:56,055 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 119 transitions.
[2020-08-21 20:23:56,056 INFO  L78                 Accepts]: Start accepts. Automaton has 105 states and 119 transitions. Word has length 58
[2020-08-21 20:23:56,056 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-21 20:23:56,056 INFO  L479      AbstractCegarLoop]: Abstraction has 105 states and 119 transitions.
[2020-08-21 20:23:56,056 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 8 states.
[2020-08-21 20:23:56,056 INFO  L276                IsEmpty]: Start isEmpty. Operand 105 states and 119 transitions.
[2020-08-21 20:23:56,058 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 67
[2020-08-21 20:23:56,058 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-21 20:23:56,058 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]
[2020-08-21 20:23:56,058 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-08-21 20:23:56,058 INFO  L427      AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 20:23:56,059 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 20:23:56,059 INFO  L82        PathProgramCache]: Analyzing trace with hash -1273380087, now seen corresponding path program 1 times
[2020-08-21 20:23:56,059 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 20:23:56,059 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1485790599]
[2020-08-21 20:23:56,059 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 20:23:56,088 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 20:23:56,338 WARN  L193               SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 184
[2020-08-21 20:23:56,339 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 20:23:56,352 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 20:23:56,367 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2020-08-21 20:23:56,368 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 20:23:56,369 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9
[2020-08-21 20:23:56,370 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 20:23:56,371 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12
[2020-08-21 20:23:56,372 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 20:23:56,374 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18
[2020-08-21 20:23:56,375 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 20:23:56,385 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36
[2020-08-21 20:23:56,386 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 20:23:56,388 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2020-08-21 20:23:56,389 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 20:23:56,390 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46
[2020-08-21 20:23:56,390 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 20:23:56,392 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52
[2020-08-21 20:23:56,393 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 20:23:56,404 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58
[2020-08-21 20:23:56,405 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 20:23:56,416 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-21 20:23:56,417 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1485790599]
[2020-08-21 20:23:56,417 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-21 20:23:56,417 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2020-08-21 20:23:56,417 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336667746]
[2020-08-21 20:23:56,418 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 8 states
[2020-08-21 20:23:56,418 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 20:23:56,418 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2020-08-21 20:23:56,419 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2020-08-21 20:23:56,419 INFO  L87              Difference]: Start difference. First operand 105 states and 119 transitions. Second operand 8 states.
[2020-08-21 20:23:56,837 WARN  L193               SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 186
[2020-08-21 20:23:58,065 WARN  L193               SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 188
[2020-08-21 20:23:58,394 WARN  L193               SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 188
[2020-08-21 20:23:58,663 WARN  L193               SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 188
[2020-08-21 20:23:58,907 WARN  L193               SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 186
[2020-08-21 20:23:59,525 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-21 20:23:59,525 INFO  L93              Difference]: Finished difference Result 314 states and 408 transitions.
[2020-08-21 20:23:59,526 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. 
[2020-08-21 20:23:59,526 INFO  L78                 Accepts]: Start accepts. Automaton has 8 states. Word has length 66
[2020-08-21 20:23:59,526 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-21 20:23:59,530 INFO  L225             Difference]: With dead ends: 314
[2020-08-21 20:23:59,530 INFO  L226             Difference]: Without dead ends: 233
[2020-08-21 20:23:59,531 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182
[2020-08-21 20:23:59,532 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 233 states.
[2020-08-21 20:23:59,584 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 184.
[2020-08-21 20:23:59,584 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 184 states.
[2020-08-21 20:23:59,586 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 215 transitions.
[2020-08-21 20:23:59,586 INFO  L78                 Accepts]: Start accepts. Automaton has 184 states and 215 transitions. Word has length 66
[2020-08-21 20:23:59,587 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-21 20:23:59,587 INFO  L479      AbstractCegarLoop]: Abstraction has 184 states and 215 transitions.
[2020-08-21 20:23:59,587 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 8 states.
[2020-08-21 20:23:59,587 INFO  L276                IsEmpty]: Start isEmpty. Operand 184 states and 215 transitions.
[2020-08-21 20:23:59,589 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 71
[2020-08-21 20:23:59,590 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-21 20:23:59,590 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]
[2020-08-21 20:23:59,590 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2020-08-21 20:23:59,590 INFO  L427      AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 20:23:59,590 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 20:23:59,591 INFO  L82        PathProgramCache]: Analyzing trace with hash -1502182801, now seen corresponding path program 1 times
[2020-08-21 20:23:59,591 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 20:23:59,591 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1199870095]
[2020-08-21 20:23:59,591 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 20:23:59,616 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 20:23:59,858 WARN  L193               SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 184
[2020-08-21 20:23:59,859 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 20:23:59,870 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 20:23:59,883 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2020-08-21 20:23:59,883 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 20:23:59,884 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9
[2020-08-21 20:23:59,885 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 20:23:59,886 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12
[2020-08-21 20:23:59,887 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 20:23:59,888 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18
[2020-08-21 20:23:59,888 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 20:23:59,911 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35
[2020-08-21 20:23:59,912 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 20:23:59,925 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40
[2020-08-21 20:23:59,926 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 20:23:59,927 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2020-08-21 20:23:59,927 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 20:23:59,928 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50
[2020-08-21 20:23:59,929 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 20:23:59,930 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56
[2020-08-21 20:23:59,930 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 20:23:59,931 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62
[2020-08-21 20:23:59,932 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 20:23:59,940 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-21 20:23:59,940 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1199870095]
[2020-08-21 20:23:59,940 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-21 20:23:59,941 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2020-08-21 20:23:59,941 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46605733]
[2020-08-21 20:23:59,941 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 6 states
[2020-08-21 20:23:59,942 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 20:23:59,942 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2020-08-21 20:23:59,942 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2020-08-21 20:23:59,942 INFO  L87              Difference]: Start difference. First operand 184 states and 215 transitions. Second operand 6 states.
[2020-08-21 20:24:00,250 WARN  L193               SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 186
[2020-08-21 20:24:00,853 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-21 20:24:00,853 INFO  L93              Difference]: Finished difference Result 306 states and 373 transitions.
[2020-08-21 20:24:00,854 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2020-08-21 20:24:00,854 INFO  L78                 Accepts]: Start accepts. Automaton has 6 states. Word has length 70
[2020-08-21 20:24:00,855 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-21 20:24:00,857 INFO  L225             Difference]: With dead ends: 306
[2020-08-21 20:24:00,857 INFO  L226             Difference]: Without dead ends: 146
[2020-08-21 20:24:00,859 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
[2020-08-21 20:24:00,860 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 146 states.
[2020-08-21 20:24:00,885 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 133.
[2020-08-21 20:24:00,885 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 133 states.
[2020-08-21 20:24:00,886 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 148 transitions.
[2020-08-21 20:24:00,886 INFO  L78                 Accepts]: Start accepts. Automaton has 133 states and 148 transitions. Word has length 70
[2020-08-21 20:24:00,887 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-21 20:24:00,887 INFO  L479      AbstractCegarLoop]: Abstraction has 133 states and 148 transitions.
[2020-08-21 20:24:00,887 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 6 states.
[2020-08-21 20:24:00,887 INFO  L276                IsEmpty]: Start isEmpty. Operand 133 states and 148 transitions.
[2020-08-21 20:24:00,888 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 71
[2020-08-21 20:24:00,888 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-21 20:24:00,889 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]
[2020-08-21 20:24:00,889 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2020-08-21 20:24:00,889 INFO  L427      AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 20:24:00,889 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 20:24:00,889 INFO  L82        PathProgramCache]: Analyzing trace with hash 1264318339, now seen corresponding path program 1 times
[2020-08-21 20:24:00,890 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 20:24:00,890 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [873833275]
[2020-08-21 20:24:00,890 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 20:24:00,946 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2020-08-21 20:24:00,949 INFO  L174   FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace
[2020-08-21 20:24:00,949 INFO  L520         BasicCegarLoop]: Counterexample might be feasible
[2020-08-21 20:24:00,954 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5
[2020-08-21 20:24:00,976 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 08:24:00 BoogieIcfgContainer
[2020-08-21 20:24:00,976 INFO  L132        PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-08-21 20:24:00,978 INFO  L168              Benchmark]: Toolchain (without parser) took 13544.96 ms. Allocated memory was 147.3 MB in the beginning and 452.5 MB in the end (delta: 305.1 MB). Free memory was 101.4 MB in the beginning and 348.9 MB in the end (delta: -247.5 MB). Peak memory consumption was 57.7 MB. Max. memory is 7.1 GB.
[2020-08-21 20:24:00,979 INFO  L168              Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 147.3 MB. Free memory was 120.6 MB in the beginning and 120.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB.
[2020-08-21 20:24:00,980 INFO  L168              Benchmark]: CACSL2BoogieTranslator took 742.09 ms. Allocated memory was 147.3 MB in the beginning and 202.9 MB in the end (delta: 55.6 MB). Free memory was 101.2 MB in the beginning and 170.0 MB in the end (delta: -68.8 MB). Peak memory consumption was 22.4 MB. Max. memory is 7.1 GB.
[2020-08-21 20:24:00,981 INFO  L168              Benchmark]: Boogie Preprocessor took 84.33 ms. Allocated memory is still 202.9 MB. Free memory was 170.0 MB in the beginning and 166.1 MB in the end (delta: 3.9 MB). Peak memory consumption was 3.9 MB. Max. memory is 7.1 GB.
[2020-08-21 20:24:00,982 INFO  L168              Benchmark]: RCFGBuilder took 1288.33 ms. Allocated memory was 202.9 MB in the beginning and 235.9 MB in the end (delta: 33.0 MB). Free memory was 166.1 MB in the beginning and 195.4 MB in the end (delta: -29.3 MB). Peak memory consumption was 82.2 MB. Max. memory is 7.1 GB.
[2020-08-21 20:24:00,983 INFO  L168              Benchmark]: TraceAbstraction took 11425.26 ms. Allocated memory was 235.9 MB in the beginning and 452.5 MB in the end (delta: 216.5 MB). Free memory was 195.4 MB in the beginning and 348.9 MB in the end (delta: -153.5 MB). Peak memory consumption was 63.1 MB. Max. memory is 7.1 GB.
[2020-08-21 20:24:00,986 INFO  L336   ainManager$Toolchain]: #######################  End [Toolchain 1] #######################
 --- Results ---
 * Results from de.uni_freiburg.informatik.ultimate.core:
  - StatisticsResult: Toolchain Benchmarks
    Benchmark results are:
 * CDTParser took 0.32 ms. Allocated memory is still 147.3 MB. Free memory was 120.6 MB in the beginning and 120.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB.
 * CACSL2BoogieTranslator took 742.09 ms. Allocated memory was 147.3 MB in the beginning and 202.9 MB in the end (delta: 55.6 MB). Free memory was 101.2 MB in the beginning and 170.0 MB in the end (delta: -68.8 MB). Peak memory consumption was 22.4 MB. Max. memory is 7.1 GB.
 * Boogie Preprocessor took 84.33 ms. Allocated memory is still 202.9 MB. Free memory was 170.0 MB in the beginning and 166.1 MB in the end (delta: 3.9 MB). Peak memory consumption was 3.9 MB. Max. memory is 7.1 GB.
 * RCFGBuilder took 1288.33 ms. Allocated memory was 202.9 MB in the beginning and 235.9 MB in the end (delta: 33.0 MB). Free memory was 166.1 MB in the beginning and 195.4 MB in the end (delta: -29.3 MB). Peak memory consumption was 82.2 MB. Max. memory is 7.1 GB.
 * TraceAbstraction took 11425.26 ms. Allocated memory was 235.9 MB in the beginning and 452.5 MB in the end (delta: 216.5 MB). Free memory was 195.4 MB in the beginning and 348.9 MB in the end (delta: -153.5 MB). Peak memory consumption was 63.1 MB. Max. memory is 7.1 GB.
 * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
  - CounterExampleResult [Line: 643]: a call of __VERIFIER_error() is reachable
    a call of __VERIFIER_error() is reachable
We found a FailurePath: 
[L40]               int cleanupTimeShifts  =    4;
[L184]              int waterLevel  =    1;
[L185]              int methaneLevelCritical  =    0;
[L442]              static struct __ACC__ERR *head  =    (struct __ACC__ERR *)0;
[L652]              int pumpRunning  =    0;
[L653]              int systemActive  =    1;
[L121]              int retValue_acc ;
[L122]              int tmp ;
[L126]  FCALL       select_helpers()
[L127]  FCALL       select_features()
[L128]  CALL, EXPR  valid_product()
[L170]              int retValue_acc ;
[L173]              retValue_acc = 1
[L174]              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()
[L832]              int splverifierCounter ;
[L833]              int tmp ;
[L834]              int tmp___0 ;
[L835]              int tmp___1 ;
[L836]              int tmp___2 ;
[L839]              splverifierCounter = 0
[L841]  COND TRUE   1
[L843]  COND TRUE   splverifierCounter < 4
[L849]              tmp = __VERIFIER_nondet_int()
[L851]  COND TRUE   \read(tmp)
[L853]  CALL        waterRise()
[L202]  COND TRUE   waterLevel < 2
[L203]              waterLevel = waterLevel + 1
[L853]  RET         waterRise()
[L859]              tmp___0 = __VERIFIER_nondet_int()
[L861]  COND FALSE  !(\read(tmp___0))
[L869]              tmp___2 = __VERIFIER_nondet_int()
[L871]  COND FALSE  !(\read(tmp___2))
[L877]              tmp___1 = __VERIFIER_nondet_int()
[L879]  COND TRUE   \read(tmp___1)
[L886]  CALL        timeShift()
[L660]  COND FALSE  !(\read(pumpRunning))
[L667]  COND TRUE   \read(systemActive)
[L669]  CALL        processEnvironment()
[L689]              int tmp ;
[L692]  COND FALSE  !(\read(pumpRunning))
[L707]  FCALL       processEnvironment__wrappee__base()
[L669]  RET         processEnvironment()
[L675]  CALL        __utac_acc__Specification3_spec__1()
[L899]              int tmp ;
[L900]              int tmp___0 ;
[L901]              int tmp___1 ;
[L905]  CALL, EXPR  isMethaneLevelCritical()
[L223]              int retValue_acc ;
[L226]              retValue_acc = methaneLevelCritical
[L227]              return (retValue_acc);
[L905]  RET, EXPR   isMethaneLevelCritical()
[L905]              tmp = isMethaneLevelCritical()
[L907]  COND FALSE  !(\read(tmp))
[L911]  CALL, EXPR  getWaterLevel()
[L255]              int retValue_acc ;
[L258]              retValue_acc = waterLevel
[L259]              return (retValue_acc);
[L911]  RET, EXPR   getWaterLevel()
[L911]              tmp___0 = getWaterLevel()
[L913]  COND TRUE   tmp___0 == 2
[L915]  CALL, EXPR  isPumpRunning()
[L759]              int retValue_acc ;
[L762]              retValue_acc = pumpRunning
[L763]              return (retValue_acc);
[L915]  RET, EXPR   isPumpRunning()
[L915]              tmp___1 = isPumpRunning()
[L917]  COND FALSE  !(\read(tmp___1))
[L921]  CALL        __automaton_fail()
[L643]              __VERIFIER_error()

  - StatisticsResult: Ultimate Automizer benchmark data
    CFG has 39 procedures, 228 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 11.3s, OverallIterations: 6, TraceHistogramMax: 1, AutomataDifference: 8.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 460 SDtfs, 744 SDslu, 251 SDs, 0 SdLazy, 1382 SolverSat, 489 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.7s 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, 1.8s 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...