/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=HIGHLEXORDER --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c


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


This is Ultimate 0.1.25-177f698
[2020-08-21 19:07:20,310 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-08-21 19:07:20,313 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-08-21 19:07:20,357 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-08-21 19:07:20,358 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-08-21 19:07:20,369 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-08-21 19:07:20,370 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-08-21 19:07:20,373 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2020-08-21 19:07:20,375 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-08-21 19:07:20,376 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-08-21 19:07:20,378 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2020-08-21 19:07:20,381 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-08-21 19:07:20,383 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-08-21 19:07:20,386 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-08-21 19:07:20,387 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-08-21 19:07:20,389 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-08-21 19:07:20,390 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-08-21 19:07:20,392 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-08-21 19:07:20,393 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-08-21 19:07:20,398 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-08-21 19:07:20,404 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-08-21 19:07:20,405 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-08-21 19:07:20,406 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-08-21 19:07:20,408 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-08-21 19:07:20,414 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-08-21 19:07:20,414 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-08-21 19:07:20,415 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-08-21 19:07:20,418 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-08-21 19:07:20,418 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-08-21 19:07:20,420 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-08-21 19:07:20,420 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-08-21 19:07:20,421 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-08-21 19:07:20,422 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-08-21 19:07:20,423 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2020-08-21 19:07:20,424 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-08-21 19:07:20,424 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2020-08-21 19:07:20,425 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-08-21 19:07:20,425 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-08-21 19:07:20,425 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2020-08-21 19:07:20,427 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-08-21 19:07:20,428 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 19:07:20,472 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-08-21 19:07:20,472 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-08-21 19:07:20,474 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-08-21 19:07:20,474 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-08-21 19:07:20,474 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-08-21 19:07:20,474 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-08-21 19:07:20,474 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-08-21 19:07:20,475 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-08-21 19:07:20,475 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-08-21 19:07:20,476 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-08-21 19:07:20,477 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-08-21 19:07:20,477 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-08-21 19:07:20,477 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-08-21 19:07:20,478 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-08-21 19:07:20,478 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-08-21 19:07:20,478 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-08-21 19:07:20,478 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-08-21 19:07:20,479 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-08-21 19:07:20,479 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-08-21 19:07:20,479 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-08-21 19:07:20,479 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-08-21 19:07:20,480 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-08-21 19:07:20,480 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-08-21 19:07:20,480 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-08-21 19:07:20,480 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-08-21 19:07:20,480 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-08-21 19:07:20,481 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-08-21 19:07:20,481 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-08-21 19:07:20,481 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-08-21 19:07:20,481 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=HIGHLEXORDER;log-additional-information=true;
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=HIGHLEXORDER;log-additional-information=true;
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=HIGHLEXORDER;log-additional-information=true;
[2020-08-21 19:07:20,859 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2020-08-21 19:07:20,877 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-08-21 19:07:20,881 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-08-21 19:07:20,882 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-08-21 19:07:20,883 INFO  L275        PluginConnector]: CDTParser initialized
[2020-08-21 19:07:20,884 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c
[2020-08-21 19:07:20,939 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/37d05b235/aeb11c8c94464c079e98d261547c503c/FLAG19cdf9010
[2020-08-21 19:07:21,682 INFO  L306              CDTParser]: Found 1 translation units.
[2020-08-21 19:07:21,683 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c
[2020-08-21 19:07:21,716 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/37d05b235/aeb11c8c94464c079e98d261547c503c/FLAG19cdf9010
[2020-08-21 19:07:21,810 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/37d05b235/aeb11c8c94464c079e98d261547c503c
[2020-08-21 19:07:21,818 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-08-21 19:07:21,819 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-08-21 19:07:21,820 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-08-21 19:07:21,820 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-08-21 19:07:21,824 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-08-21 19:07:21,825 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 07:07:21" (1/1) ...
[2020-08-21 19:07:21,828 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7759d65d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:07:21, skipping insertion in model container
[2020-08-21 19:07:21,828 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 07:07:21" (1/1) ...
[2020-08-21 19:07:21,835 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-08-21 19:07:21,988 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-08-21 19:07:23,464 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-08-21 19:07:23,488 INFO  L203         MainTranslator]: Completed pre-run
[2020-08-21 19:07:24,466 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-08-21 19:07:24,497 INFO  L208         MainTranslator]: Completed translation
[2020-08-21 19:07:24,499 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:07:24 WrapperNode
[2020-08-21 19:07:24,499 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-08-21 19:07:24,500 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-08-21 19:07:24,500 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-08-21 19:07:24,500 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-08-21 19:07:24,517 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:07:24" (1/1) ...
[2020-08-21 19:07:24,520 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:07:24" (1/1) ...
[2020-08-21 19:07:24,592 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:07:24" (1/1) ...
[2020-08-21 19:07:24,596 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:07:24" (1/1) ...
[2020-08-21 19:07:24,691 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:07:24" (1/1) ...
[2020-08-21 19:07:24,725 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:07:24" (1/1) ...
[2020-08-21 19:07:24,739 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:07:24" (1/1) ...
[2020-08-21 19:07:24,771 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-08-21 19:07:24,772 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-08-21 19:07:24,772 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-08-21 19:07:24,772 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-08-21 19:07:24,774 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:07:24" (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 19:07:24,864 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-08-21 19:07:24,865 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-08-21 19:07:24,865 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2020-08-21 19:07:24,866 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-08-21 19:07:24,866 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-08-21 19:07:24,867 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char
[2020-08-21 19:07:24,867 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar
[2020-08-21 19:07:24,867 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool
[2020-08-21 19:07:24,868 INFO  L130     BoogieDeclarations]: Found specification of procedure assert
[2020-08-21 19:07:24,869 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2020-08-21 19:07:24,869 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2020-08-21 19:07:24,870 INFO  L130     BoogieDeclarations]: Found specification of procedure read
[2020-08-21 19:07:24,870 INFO  L130     BoogieDeclarations]: Found specification of procedure write
[2020-08-21 19:07:24,870 INFO  L130     BoogieDeclarations]: Found specification of procedure node1
[2020-08-21 19:07:24,871 INFO  L130     BoogieDeclarations]: Found specification of procedure node2
[2020-08-21 19:07:24,872 INFO  L130     BoogieDeclarations]: Found specification of procedure node3
[2020-08-21 19:07:24,873 INFO  L130     BoogieDeclarations]: Found specification of procedure node4
[2020-08-21 19:07:24,873 INFO  L130     BoogieDeclarations]: Found specification of procedure init
[2020-08-21 19:07:24,873 INFO  L130     BoogieDeclarations]: Found specification of procedure check
[2020-08-21 19:07:24,874 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-08-21 19:07:24,874 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-08-21 19:07:24,874 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-08-21 19:07:28,215 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-08-21 19:07:28,216 INFO  L295             CfgBuilder]: Removed 0 assume(true) statements.
[2020-08-21 19:07:28,231 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 07:07:28 BoogieIcfgContainer
[2020-08-21 19:07:28,232 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-08-21 19:07:28,233 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-08-21 19:07:28,234 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-08-21 19:07:28,237 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-08-21 19:07:28,237 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 07:07:21" (1/3) ...
[2020-08-21 19:07:28,238 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9310b9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 07:07:28, skipping insertion in model container
[2020-08-21 19:07:28,238 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:07:24" (2/3) ...
[2020-08-21 19:07:28,239 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9310b9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 07:07:28, skipping insertion in model container
[2020-08-21 19:07:28,239 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 07:07:28" (3/3) ...
[2020-08-21 19:07:28,242 INFO  L109   eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c
[2020-08-21 19:07:28,252 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-08-21 19:07:28,265 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 12 error locations.
[2020-08-21 19:07:28,281 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 12 error locations.
[2020-08-21 19:07:28,318 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-08-21 19:07:28,318 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-08-21 19:07:28,318 INFO  L377      AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-08-21 19:07:28,319 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-08-21 19:07:28,319 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-08-21 19:07:28,319 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-08-21 19:07:28,319 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-08-21 19:07:28,319 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-08-21 19:07:28,366 INFO  L276                IsEmpty]: Start isEmpty. Operand 1016 states.
[2020-08-21 19:07:28,406 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 325
[2020-08-21 19:07:28,407 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-21 19:07:28,409 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:07:28,410 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 19:07:28,417 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 19:07:28,417 INFO  L82        PathProgramCache]: Analyzing trace with hash -179235525, now seen corresponding path program 1 times
[2020-08-21 19:07:28,427 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 19:07:28,427 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [334435060]
[2020-08-21 19:07:28,428 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 19:07:29,253 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 19:07:30,511 WARN  L193               SmtUtils]: Spent 689.00 ms on a formula simplification that was a NOOP. DAG size: 322
[2020-08-21 19:07:30,514 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 19:07:30,522 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 19:07:30,724 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 19:07:30,725 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [334435060]
[2020-08-21 19:07:30,728 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-21 19:07:30,728 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-21 19:07:30,729 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423875339]
[2020-08-21 19:07:30,737 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-21 19:07:30,738 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 19:07:30,761 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-21 19:07:30,762 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-21 19:07:30,766 INFO  L87              Difference]: Start difference. First operand 1016 states. Second operand 4 states.
[2020-08-21 19:07:31,588 WARN  L193               SmtUtils]: Spent 720.00 ms on a formula simplification that was a NOOP. DAG size: 323
[2020-08-21 19:07:39,127 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-21 19:07:39,127 INFO  L93              Difference]: Finished difference Result 1776 states and 3147 transitions.
[2020-08-21 19:07:39,128 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-08-21 19:07:39,130 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 324
[2020-08-21 19:07:39,132 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-21 19:07:39,163 INFO  L225             Difference]: With dead ends: 1776
[2020-08-21 19:07:39,164 INFO  L226             Difference]: Without dead ends: 1481
[2020-08-21 19:07:39,171 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2020-08-21 19:07:39,196 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1481 states.
[2020-08-21 19:07:39,307 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1481 to 1479.
[2020-08-21 19:07:39,308 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1479 states.
[2020-08-21 19:07:39,317 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1479 states to 1479 states and 2266 transitions.
[2020-08-21 19:07:39,319 INFO  L78                 Accepts]: Start accepts. Automaton has 1479 states and 2266 transitions. Word has length 324
[2020-08-21 19:07:39,321 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-21 19:07:39,321 INFO  L479      AbstractCegarLoop]: Abstraction has 1479 states and 2266 transitions.
[2020-08-21 19:07:39,321 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-21 19:07:39,322 INFO  L276                IsEmpty]: Start isEmpty. Operand 1479 states and 2266 transitions.
[2020-08-21 19:07:39,330 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 325
[2020-08-21 19:07:39,330 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-21 19:07:39,331 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:07:39,331 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-08-21 19:07:39,332 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 19:07:39,332 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 19:07:39,332 INFO  L82        PathProgramCache]: Analyzing trace with hash -220420006, now seen corresponding path program 1 times
[2020-08-21 19:07:39,333 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 19:07:39,333 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1692232895]
[2020-08-21 19:07:39,333 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 19:07:39,626 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 19:07:40,606 WARN  L193               SmtUtils]: Spent 716.00 ms on a formula simplification that was a NOOP. DAG size: 322
[2020-08-21 19:07:40,608 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 19:07:40,618 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 19:07:40,936 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 19:07:40,937 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1692232895]
[2020-08-21 19:07:40,938 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-21 19:07:40,938 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-21 19:07:40,939 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724153370]
[2020-08-21 19:07:40,945 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-21 19:07:40,945 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 19:07:40,946 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-21 19:07:40,946 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-21 19:07:40,946 INFO  L87              Difference]: Start difference. First operand 1479 states and 2266 transitions. Second operand 4 states.
[2020-08-21 19:07:41,562 WARN  L193               SmtUtils]: Spent 557.00 ms on a formula simplification that was a NOOP. DAG size: 323
[2020-08-21 19:07:48,310 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-21 19:07:48,311 INFO  L93              Difference]: Finished difference Result 2852 states and 4423 transitions.
[2020-08-21 19:07:48,312 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-08-21 19:07:48,312 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 324
[2020-08-21 19:07:48,313 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-21 19:07:48,326 INFO  L225             Difference]: With dead ends: 2852
[2020-08-21 19:07:48,327 INFO  L226             Difference]: Without dead ends: 2439
[2020-08-21 19:07:48,331 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2020-08-21 19:07:48,336 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2439 states.
[2020-08-21 19:07:48,405 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2439 to 2437.
[2020-08-21 19:07:48,406 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 2437 states.
[2020-08-21 19:07:48,418 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2437 states to 2437 states and 3757 transitions.
[2020-08-21 19:07:48,418 INFO  L78                 Accepts]: Start accepts. Automaton has 2437 states and 3757 transitions. Word has length 324
[2020-08-21 19:07:48,419 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-21 19:07:48,419 INFO  L479      AbstractCegarLoop]: Abstraction has 2437 states and 3757 transitions.
[2020-08-21 19:07:48,419 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-21 19:07:48,420 INFO  L276                IsEmpty]: Start isEmpty. Operand 2437 states and 3757 transitions.
[2020-08-21 19:07:48,428 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 325
[2020-08-21 19:07:48,428 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-21 19:07:48,429 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:07:48,429 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-08-21 19:07:48,430 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 19:07:48,430 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 19:07:48,430 INFO  L82        PathProgramCache]: Analyzing trace with hash -578874774, now seen corresponding path program 1 times
[2020-08-21 19:07:48,430 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 19:07:48,431 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1994240008]
[2020-08-21 19:07:48,431 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 19:07:48,810 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 19:07:49,588 WARN  L193               SmtUtils]: Spent 543.00 ms on a formula simplification that was a NOOP. DAG size: 322
[2020-08-21 19:07:49,589 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 19:07:49,599 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 19:07:49,889 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 19:07:49,889 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1994240008]
[2020-08-21 19:07:49,890 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-21 19:07:49,890 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-08-21 19:07:49,890 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766051445]
[2020-08-21 19:07:49,891 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-08-21 19:07:49,892 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 19:07:49,893 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-08-21 19:07:49,893 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-08-21 19:07:49,893 INFO  L87              Difference]: Start difference. First operand 2437 states and 3757 transitions. Second operand 5 states.
[2020-08-21 19:07:59,416 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-21 19:07:59,416 INFO  L93              Difference]: Finished difference Result 7199 states and 11086 transitions.
[2020-08-21 19:07:59,417 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-08-21 19:07:59,417 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 324
[2020-08-21 19:07:59,418 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-21 19:07:59,440 INFO  L225             Difference]: With dead ends: 7199
[2020-08-21 19:07:59,440 INFO  L226             Difference]: Without dead ends: 4777
[2020-08-21 19:07:59,446 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2020-08-21 19:07:59,453 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 4777 states.
[2020-08-21 19:07:59,608 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 4777 to 4653.
[2020-08-21 19:07:59,608 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 4653 states.
[2020-08-21 19:07:59,624 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4653 states to 4653 states and 7163 transitions.
[2020-08-21 19:07:59,624 INFO  L78                 Accepts]: Start accepts. Automaton has 4653 states and 7163 transitions. Word has length 324
[2020-08-21 19:07:59,625 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-21 19:07:59,625 INFO  L479      AbstractCegarLoop]: Abstraction has 4653 states and 7163 transitions.
[2020-08-21 19:07:59,625 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-08-21 19:07:59,626 INFO  L276                IsEmpty]: Start isEmpty. Operand 4653 states and 7163 transitions.
[2020-08-21 19:07:59,643 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 327
[2020-08-21 19:07:59,643 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-21 19:07:59,643 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:07:59,644 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-08-21 19:07:59,646 INFO  L427      AbstractCegarLoop]: === Iteration 4 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 19:07:59,647 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 19:07:59,647 INFO  L82        PathProgramCache]: Analyzing trace with hash 76253758, now seen corresponding path program 1 times
[2020-08-21 19:07:59,648 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 19:07:59,648 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [977679307]
[2020-08-21 19:07:59,649 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 19:07:59,843 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 19:08:00,459 WARN  L193               SmtUtils]: Spent 489.00 ms on a formula simplification that was a NOOP. DAG size: 322
[2020-08-21 19:08:00,460 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 19:08:00,466 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 19:08:00,653 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 19:08:00,654 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [977679307]
[2020-08-21 19:08:00,654 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-21 19:08:00,654 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-21 19:08:00,655 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334380819]
[2020-08-21 19:08:00,656 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-21 19:08:00,656 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 19:08:00,656 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-21 19:08:00,657 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-21 19:08:00,657 INFO  L87              Difference]: Start difference. First operand 4653 states and 7163 transitions. Second operand 4 states.
[2020-08-21 19:08:11,766 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-21 19:08:11,766 INFO  L93              Difference]: Finished difference Result 13649 states and 20959 transitions.
[2020-08-21 19:08:11,767 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-08-21 19:08:11,768 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 326
[2020-08-21 19:08:11,768 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-21 19:08:11,808 INFO  L225             Difference]: With dead ends: 13649
[2020-08-21 19:08:11,808 INFO  L226             Difference]: Without dead ends: 9125
[2020-08-21 19:08:11,817 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-21 19:08:11,828 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9125 states.
[2020-08-21 19:08:12,150 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9125 to 9001.
[2020-08-21 19:08:12,150 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 9001 states.
[2020-08-21 19:08:12,166 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 9001 states to 9001 states and 13804 transitions.
[2020-08-21 19:08:12,167 INFO  L78                 Accepts]: Start accepts. Automaton has 9001 states and 13804 transitions. Word has length 326
[2020-08-21 19:08:12,167 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-21 19:08:12,167 INFO  L479      AbstractCegarLoop]: Abstraction has 9001 states and 13804 transitions.
[2020-08-21 19:08:12,167 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-21 19:08:12,167 INFO  L276                IsEmpty]: Start isEmpty. Operand 9001 states and 13804 transitions.
[2020-08-21 19:08:12,185 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 327
[2020-08-21 19:08:12,185 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-21 19:08:12,186 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:08:12,186 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2020-08-21 19:08:12,190 INFO  L427      AbstractCegarLoop]: === Iteration 5 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 19:08:12,190 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 19:08:12,190 INFO  L82        PathProgramCache]: Analyzing trace with hash -1985882685, now seen corresponding path program 1 times
[2020-08-21 19:08:12,191 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 19:08:12,191 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [148254340]
[2020-08-21 19:08:12,191 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 19:08:12,241 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 19:08:12,828 WARN  L193               SmtUtils]: Spent 509.00 ms on a formula simplification that was a NOOP. DAG size: 322
[2020-08-21 19:08:12,829 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 19:08:12,836 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 19:08:12,957 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 19:08:12,958 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [148254340]
[2020-08-21 19:08:12,958 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-21 19:08:12,958 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-21 19:08:12,958 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532757743]
[2020-08-21 19:08:12,959 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-21 19:08:12,959 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 19:08:12,960 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-21 19:08:12,960 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-21 19:08:12,960 INFO  L87              Difference]: Start difference. First operand 9001 states and 13804 transitions. Second operand 4 states.