/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c


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


This is Ultimate 0.1.25-5644d1e-m
[2020-08-18 12:19:29,631 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-08-18 12:19:29,633 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-08-18 12:19:29,657 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-08-18 12:19:29,657 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-08-18 12:19:29,658 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-08-18 12:19:29,660 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-08-18 12:19:29,662 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2020-08-18 12:19:29,663 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-08-18 12:19:29,664 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-08-18 12:19:29,665 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2020-08-18 12:19:29,666 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-08-18 12:19:29,666 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-08-18 12:19:29,667 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-08-18 12:19:29,668 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-08-18 12:19:29,669 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-08-18 12:19:29,670 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-08-18 12:19:29,671 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-08-18 12:19:29,673 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-08-18 12:19:29,675 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-08-18 12:19:29,678 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-08-18 12:19:29,680 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-08-18 12:19:29,683 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-08-18 12:19:29,685 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-08-18 12:19:29,687 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-08-18 12:19:29,687 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-08-18 12:19:29,687 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-08-18 12:19:29,691 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-08-18 12:19:29,691 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-08-18 12:19:29,692 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-08-18 12:19:29,693 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-08-18 12:19:29,696 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-08-18 12:19:29,697 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-08-18 12:19:29,698 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2020-08-18 12:19:29,699 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-08-18 12:19:29,700 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2020-08-18 12:19:29,700 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
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[2020-08-18 12:19:29,701 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2020-08-18 12:19:29,712 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-08-18 12:19:29,713 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf
[2020-08-18 12:19:29,736 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-08-18 12:19:29,737 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-08-18 12:19:29,738 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-08-18 12:19:29,738 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-08-18 12:19:29,738 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-08-18 12:19:29,738 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-08-18 12:19:29,739 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-08-18 12:19:29,744 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-08-18 12:19:29,744 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-08-18 12:19:29,744 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-08-18 12:19:29,745 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-08-18 12:19:29,745 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-08-18 12:19:29,745 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-08-18 12:19:29,745 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-08-18 12:19:29,745 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-08-18 12:19:29,745 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-08-18 12:19:29,746 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-08-18 12:19:29,746 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-08-18 12:19:29,746 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-08-18 12:19:29,746 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-08-18 12:19:29,746 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-08-18 12:19:29,747 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-08-18 12:19:29,747 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-08-18 12:19:29,747 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-08-18 12:19:29,747 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-08-18 12:19:29,747 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-08-18 12:19:29,748 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-08-18 12:19:29,748 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-08-18 12:19:29,748 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-08-18 12:19:29,748 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLEST;
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLEST;
[2020-08-18 12:19:30,070 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2020-08-18 12:19:30,081 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-08-18 12:19:30,085 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-08-18 12:19:30,088 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-08-18 12:19:30,088 INFO  L275        PluginConnector]: CDTParser initialized
[2020-08-18 12:19:30,089 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c
[2020-08-18 12:19:30,169 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/77ab0d187/7c82288c1b2741518eefda958047e2f8/FLAG28903e2d3
[2020-08-18 12:19:30,943 INFO  L306              CDTParser]: Found 1 translation units.
[2020-08-18 12:19:30,944 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c
[2020-08-18 12:19:30,989 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/77ab0d187/7c82288c1b2741518eefda958047e2f8/FLAG28903e2d3
[2020-08-18 12:19:31,091 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/77ab0d187/7c82288c1b2741518eefda958047e2f8
[2020-08-18 12:19:31,103 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-08-18 12:19:31,106 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-08-18 12:19:31,107 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-08-18 12:19:31,107 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-08-18 12:19:31,111 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-08-18 12:19:31,112 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 12:19:31" (1/1) ...
[2020-08-18 12:19:31,116 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c3a0ef9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:19:31, skipping insertion in model container
[2020-08-18 12:19:31,117 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 12:19:31" (1/1) ...
[2020-08-18 12:19:31,126 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-08-18 12:19:31,327 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-08-18 12:19:32,971 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-08-18 12:19:32,998 INFO  L203         MainTranslator]: Completed pre-run
[2020-08-18 12:19:34,680 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-08-18 12:19:34,718 INFO  L208         MainTranslator]: Completed translation
[2020-08-18 12:19:34,719 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:19:34 WrapperNode
[2020-08-18 12:19:34,719 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-08-18 12:19:34,720 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-08-18 12:19:34,720 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-08-18 12:19:34,721 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-08-18 12:19:34,738 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:19:34" (1/1) ...
[2020-08-18 12:19:34,740 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:19:34" (1/1) ...
[2020-08-18 12:19:34,796 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:19:34" (1/1) ...
[2020-08-18 12:19:34,800 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:19:34" (1/1) ...
[2020-08-18 12:19:34,873 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:19:34" (1/1) ...
[2020-08-18 12:19:34,911 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:19:34" (1/1) ...
[2020-08-18 12:19:34,927 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:19:34" (1/1) ...
[2020-08-18 12:19:34,948 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-08-18 12:19:34,949 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-08-18 12:19:34,949 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-08-18 12:19:34,949 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-08-18 12:19:34,951 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:19:34" (1/1) ...
No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-08-18 12:19:35,022 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-08-18 12:19:35,023 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-08-18 12:19:35,023 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2020-08-18 12:19:35,023 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-08-18 12:19:35,023 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-08-18 12:19:35,024 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char
[2020-08-18 12:19:35,024 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar
[2020-08-18 12:19:35,024 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool
[2020-08-18 12:19:35,024 INFO  L130     BoogieDeclarations]: Found specification of procedure assert
[2020-08-18 12:19:35,024 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2020-08-18 12:19:35,025 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2020-08-18 12:19:35,025 INFO  L130     BoogieDeclarations]: Found specification of procedure read
[2020-08-18 12:19:35,025 INFO  L130     BoogieDeclarations]: Found specification of procedure write
[2020-08-18 12:19:35,025 INFO  L130     BoogieDeclarations]: Found specification of procedure node1
[2020-08-18 12:19:35,025 INFO  L130     BoogieDeclarations]: Found specification of procedure node2
[2020-08-18 12:19:35,026 INFO  L130     BoogieDeclarations]: Found specification of procedure node3
[2020-08-18 12:19:35,026 INFO  L130     BoogieDeclarations]: Found specification of procedure node4
[2020-08-18 12:19:35,026 INFO  L130     BoogieDeclarations]: Found specification of procedure node5
[2020-08-18 12:19:35,026 INFO  L130     BoogieDeclarations]: Found specification of procedure init
[2020-08-18 12:19:35,027 INFO  L130     BoogieDeclarations]: Found specification of procedure check
[2020-08-18 12:19:35,027 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-08-18 12:19:35,027 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-08-18 12:19:35,027 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-08-18 12:19:39,564 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-08-18 12:19:39,564 INFO  L295             CfgBuilder]: Removed 0 assume(true) statements.
[2020-08-18 12:19:39,586 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 12:19:39 BoogieIcfgContainer
[2020-08-18 12:19:39,587 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-08-18 12:19:39,588 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-08-18 12:19:39,588 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-08-18 12:19:39,592 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-08-18 12:19:39,592 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 12:19:31" (1/3) ...
[2020-08-18 12:19:39,593 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e86835d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 12:19:39, skipping insertion in model container
[2020-08-18 12:19:39,594 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:19:34" (2/3) ...
[2020-08-18 12:19:39,594 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e86835d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 12:19:39, skipping insertion in model container
[2020-08-18 12:19:39,594 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 12:19:39" (3/3) ...
[2020-08-18 12:19:39,596 INFO  L109   eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c
[2020-08-18 12:19:39,606 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-08-18 12:19:39,618 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations.
[2020-08-18 12:19:39,631 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 2 error locations.
[2020-08-18 12:19:39,666 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-08-18 12:19:39,666 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-08-18 12:19:39,666 INFO  L377      AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-08-18 12:19:39,666 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-08-18 12:19:39,667 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-08-18 12:19:39,667 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-08-18 12:19:39,667 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-08-18 12:19:39,667 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-08-18 12:19:39,708 INFO  L276                IsEmpty]: Start isEmpty. Operand 1506 states.
[2020-08-18 12:19:39,753 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 494
[2020-08-18 12:19:39,753 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 12:19:39,755 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-18 12:19:39,755 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 12:19:39,761 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 12:19:39,762 INFO  L82        PathProgramCache]: Analyzing trace with hash 1738290825, now seen corresponding path program 1 times
[2020-08-18 12:19:39,771 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 12:19:39,771 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1129765590]
[2020-08-18 12:19:39,772 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 12:19:41,527 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 12:19:43,086 WARN  L193               SmtUtils]: Spent 902.00 ms on a formula simplification that was a NOOP. DAG size: 400
[2020-08-18 12:19:43,089 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 12:19:43,103 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 12:19:44,035 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-18 12:19:44,036 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1129765590]
[2020-08-18 12:19:44,038 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 12:19:44,038 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-08-18 12:19:44,039 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148399536]
[2020-08-18 12:19:44,045 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-08-18 12:19:44,046 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 12:19:44,059 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-08-18 12:19:44,059 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-08-18 12:19:44,061 INFO  L87              Difference]: Start difference. First operand 1506 states. Second operand 5 states.
[2020-08-18 12:20:00,673 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 12:20:00,674 INFO  L93              Difference]: Finished difference Result 4460 states and 8053 transitions.
[2020-08-18 12:20:00,675 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2020-08-18 12:20:00,676 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 493
[2020-08-18 12:20:00,678 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 12:20:00,722 INFO  L225             Difference]: With dead ends: 4460
[2020-08-18 12:20:00,722 INFO  L226             Difference]: Without dead ends: 2963
[2020-08-18 12:20:00,733 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2020-08-18 12:20:00,755 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2963 states.
[2020-08-18 12:20:00,929 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2963 to 2906.
[2020-08-18 12:20:00,930 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 2906 states.
[2020-08-18 12:20:00,943 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2906 states to 2906 states and 4772 transitions.
[2020-08-18 12:20:00,945 INFO  L78                 Accepts]: Start accepts. Automaton has 2906 states and 4772 transitions. Word has length 493
[2020-08-18 12:20:00,947 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 12:20:00,947 INFO  L479      AbstractCegarLoop]: Abstraction has 2906 states and 4772 transitions.
[2020-08-18 12:20:00,947 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-08-18 12:20:00,947 INFO  L276                IsEmpty]: Start isEmpty. Operand 2906 states and 4772 transitions.
[2020-08-18 12:20:00,961 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 496
[2020-08-18 12:20:00,962 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 12:20:00,962 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-18 12:20:00,963 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-08-18 12:20:00,963 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 12:20:00,963 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 12:20:00,964 INFO  L82        PathProgramCache]: Analyzing trace with hash -1236769392, now seen corresponding path program 1 times
[2020-08-18 12:20:00,964 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 12:20:00,964 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [467618879]
[2020-08-18 12:20:00,965 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 12:20:01,241 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 12:20:02,647 WARN  L193               SmtUtils]: Spent 1.06 s on a formula simplification that was a NOOP. DAG size: 400
[2020-08-18 12:20:02,650 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 12:20:02,662 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 12:20:03,089 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-18 12:20:03,089 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [467618879]
[2020-08-18 12:20:03,090 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 12:20:03,090 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-18 12:20:03,090 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550076280]
[2020-08-18 12:20:03,094 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-18 12:20:03,094 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 12:20:03,094 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-18 12:20:03,094 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-18 12:20:03,095 INFO  L87              Difference]: Start difference. First operand 2906 states and 4772 transitions. Second operand 4 states.
[2020-08-18 12:20:22,658 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 12:20:22,658 INFO  L93              Difference]: Finished difference Result 8439 states and 13819 transitions.
[2020-08-18 12:20:22,663 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-08-18 12:20:22,664 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 495
[2020-08-18 12:20:22,665 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 12:20:22,695 INFO  L225             Difference]: With dead ends: 8439
[2020-08-18 12:20:22,695 INFO  L226             Difference]: Without dead ends: 5747
[2020-08-18 12:20:22,702 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-18 12:20:22,710 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5747 states.
[2020-08-18 12:20:22,905 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5747 to 5692.
[2020-08-18 12:20:22,905 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 5692 states.
[2020-08-18 12:20:22,928 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5692 states to 5692 states and 9324 transitions.
[2020-08-18 12:20:22,928 INFO  L78                 Accepts]: Start accepts. Automaton has 5692 states and 9324 transitions. Word has length 495
[2020-08-18 12:20:22,931 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 12:20:22,931 INFO  L479      AbstractCegarLoop]: Abstraction has 5692 states and 9324 transitions.
[2020-08-18 12:20:22,931 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-18 12:20:22,931 INFO  L276                IsEmpty]: Start isEmpty. Operand 5692 states and 9324 transitions.
[2020-08-18 12:20:22,956 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 497
[2020-08-18 12:20:22,956 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 12:20:22,958 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-18 12:20:22,961 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-08-18 12:20:22,962 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 12:20:22,962 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 12:20:22,963 INFO  L82        PathProgramCache]: Analyzing trace with hash -1780546784, now seen corresponding path program 1 times
[2020-08-18 12:20:22,963 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 12:20:22,963 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [616665521]
[2020-08-18 12:20:22,963 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 12:20:23,037 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 12:20:24,086 WARN  L193               SmtUtils]: Spent 884.00 ms on a formula simplification that was a NOOP. DAG size: 400
[2020-08-18 12:20:24,090 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 12:20:24,099 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 12:20:24,293 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-18 12:20:24,293 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [616665521]
[2020-08-18 12:20:24,294 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 12:20:24,294 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-18 12:20:24,294 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206797562]
[2020-08-18 12:20:24,295 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-18 12:20:24,295 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 12:20:24,296 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-18 12:20:24,296 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-18 12:20:24,296 INFO  L87              Difference]: Start difference. First operand 5692 states and 9324 transitions. Second operand 4 states.