/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 --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options interpolation-heuristic=FIRST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/sum04-1.i


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


This is Ultimate 0.1.25-c90d42b
[2020-09-24 16:10:20,549 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-09-24 16:10:20,554 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-09-24 16:10:20,603 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-09-24 16:10:20,603 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-09-24 16:10:20,612 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-09-24 16:10:20,614 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-09-24 16:10:20,618 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2020-09-24 16:10:20,621 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-09-24 16:10:20,625 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-09-24 16:10:20,626 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2020-09-24 16:10:20,627 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-09-24 16:10:20,627 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-09-24 16:10:20,631 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-09-24 16:10:20,633 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-09-24 16:10:20,635 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-09-24 16:10:20,637 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-09-24 16:10:20,638 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-09-24 16:10:20,640 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-09-24 16:10:20,650 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-09-24 16:10:20,653 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-09-24 16:10:20,654 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-09-24 16:10:20,655 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-09-24 16:10:20,656 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-09-24 16:10:20,671 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-09-24 16:10:20,671 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-09-24 16:10:20,671 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-09-24 16:10:20,672 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-09-24 16:10:20,673 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-09-24 16:10:20,676 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-09-24 16:10:20,676 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-09-24 16:10:20,677 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-09-24 16:10:20,678 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-09-24 16:10:20,683 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2020-09-24 16:10:20,684 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-09-24 16:10:20,684 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2020-09-24 16:10:20,687 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
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[2020-09-24 16:10:20,687 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2020-09-24 16:10:20,689 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-09-24 16:10:20,691 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
[2020-09-24 16:10:20,734 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-09-24 16:10:20,736 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-09-24 16:10:20,738 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-09-24 16:10:20,739 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-09-24 16:10:20,739 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-09-24 16:10:20,739 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-09-24 16:10:20,739 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-09-24 16:10:20,740 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-09-24 16:10:20,740 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-09-24 16:10:20,740 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-09-24 16:10:20,741 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-09-24 16:10:20,742 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-09-24 16:10:20,742 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-09-24 16:10:20,742 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-09-24 16:10:20,742 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-09-24 16:10:20,743 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-09-24 16:10:20,743 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-09-24 16:10:20,743 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-09-24 16:10:20,743 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-09-24 16:10:20,744 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-09-24 16:10:20,744 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-09-24 16:10:20,744 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-09-24 16:10:20,745 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-09-24 16:10:20,745 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-09-24 16:10:20,745 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-09-24 16:10:20,745 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-09-24 16:10:20,745 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-09-24 16:10:20,746 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-09-24 16:10:20,746 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-09-24 16:10:20,746 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.rcfgbuilder: Size of a code block -> SingleStatement
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 -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true;
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true;
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true;
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true;
[2020-09-24 16:10:21,235 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2020-09-24 16:10:21,255 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-09-24 16:10:21,261 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-09-24 16:10:21,263 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-09-24 16:10:21,264 INFO  L275        PluginConnector]: CDTParser initialized
[2020-09-24 16:10:21,265 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum04-1.i
[2020-09-24 16:10:21,369 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/60490aa53/c214f5b4a2104d2396f72521ee7a1523/FLAG0c31b9deb
[2020-09-24 16:10:21,925 INFO  L306              CDTParser]: Found 1 translation units.
[2020-09-24 16:10:21,926 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum04-1.i
[2020-09-24 16:10:21,934 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/60490aa53/c214f5b4a2104d2396f72521ee7a1523/FLAG0c31b9deb
[2020-09-24 16:10:22,267 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/60490aa53/c214f5b4a2104d2396f72521ee7a1523
[2020-09-24 16:10:22,281 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-09-24 16:10:22,288 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-09-24 16:10:22,289 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-09-24 16:10:22,289 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-09-24 16:10:22,295 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-09-24 16:10:22,296 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 04:10:22" (1/1) ...
[2020-09-24 16:10:22,302 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b1f13a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:22, skipping insertion in model container
[2020-09-24 16:10:22,302 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 04:10:22" (1/1) ...
[2020-09-24 16:10:22,312 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-09-24 16:10:22,340 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-09-24 16:10:22,571 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-09-24 16:10:22,576 INFO  L203         MainTranslator]: Completed pre-run
[2020-09-24 16:10:22,591 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-09-24 16:10:22,606 INFO  L208         MainTranslator]: Completed translation
[2020-09-24 16:10:22,607 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:22 WrapperNode
[2020-09-24 16:10:22,607 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-09-24 16:10:22,608 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-09-24 16:10:22,608 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-09-24 16:10:22,608 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-09-24 16:10:22,621 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:22" (1/1) ...
[2020-09-24 16:10:22,621 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:22" (1/1) ...
[2020-09-24 16:10:22,627 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:22" (1/1) ...
[2020-09-24 16:10:22,627 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:22" (1/1) ...
[2020-09-24 16:10:22,631 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:22" (1/1) ...
[2020-09-24 16:10:22,636 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:22" (1/1) ...
[2020-09-24 16:10:22,637 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:22" (1/1) ...
[2020-09-24 16:10:22,717 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-09-24 16:10:22,718 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-09-24 16:10:22,718 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-09-24 16:10:22,718 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-09-24 16:10:22,721 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:22" (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
[2020-09-24 16:10:22,792 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-09-24 16:10:22,792 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-09-24 16:10:22,792 INFO  L138     BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2020-09-24 16:10:22,793 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-09-24 16:10:22,793 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-09-24 16:10:22,793 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2020-09-24 16:10:22,793 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-09-24 16:10:22,793 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-09-24 16:10:22,794 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-09-24 16:10:22,985 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-09-24 16:10:22,985 INFO  L295             CfgBuilder]: Removed 1 assume(true) statements.
[2020-09-24 16:10:22,990 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 04:10:22 BoogieIcfgContainer
[2020-09-24 16:10:22,990 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-09-24 16:10:22,992 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-09-24 16:10:22,992 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-09-24 16:10:22,995 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-09-24 16:10:22,996 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 04:10:22" (1/3) ...
[2020-09-24 16:10:22,997 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@302464d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 04:10:22, skipping insertion in model container
[2020-09-24 16:10:22,997 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:22" (2/3) ...
[2020-09-24 16:10:22,998 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@302464d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 04:10:22, skipping insertion in model container
[2020-09-24 16:10:22,998 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 04:10:22" (3/3) ...
[2020-09-24 16:10:23,000 INFO  L109   eAbstractionObserver]: Analyzing ICFG sum04-1.i
[2020-09-24 16:10:23,012 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-09-24 16:10:23,022 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-09-24 16:10:23,059 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-09-24 16:10:23,111 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-09-24 16:10:23,111 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-09-24 16:10:23,111 INFO  L377      AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-09-24 16:10:23,111 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-09-24 16:10:23,111 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-09-24 16:10:23,112 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-09-24 16:10:23,112 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-09-24 16:10:23,112 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-09-24 16:10:23,136 INFO  L276                IsEmpty]: Start isEmpty. Operand 24 states.
[2020-09-24 16:10:23,144 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 13
[2020-09-24 16:10:23,144 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 16:10:23,145 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 16:10:23,146 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 16:10:23,156 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 16:10:23,156 INFO  L82        PathProgramCache]: Analyzing trace with hash -649727231, now seen corresponding path program 1 times
[2020-09-24 16:10:23,165 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 16:10:23,166 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1123916851]
[2020-09-24 16:10:23,166 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 16:10:23,254 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 16:10:23,269 FATAL L256   erpolLogProxyWrapper]: Difference in size: 0
[2020-09-24 16:10:23,269 FATAL L256   erpolLogProxyWrapper]: Difference in depth: 0
[2020-09-24 16:10:23,269 FATAL L256   erpolLogProxyWrapper]: Difference in width: 0
[2020-09-24 16:10:23,270 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 16:10:23,270 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 21
[2020-09-24 16:10:23,270 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 16:10:23,270 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 10
[2020-09-24 16:10:23,271 FATAL L256   erpolLogProxyWrapper]: Heuristic: FIRST
[2020-09-24 16:10:23,271 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 16:10:23,271 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 14
[2020-09-24 16:10:23,271 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 16:10:23,272 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 16:10:23,300 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 16:10:23,302 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 16:10:23,304 FATAL L256   erpolLogProxyWrapper]: Difference in size: 0
[2020-09-24 16:10:23,304 FATAL L256   erpolLogProxyWrapper]: Difference in depth: 0
[2020-09-24 16:10:23,304 FATAL L256   erpolLogProxyWrapper]: Difference in width: 0
[2020-09-24 16:10:23,305 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 16:10:23,305 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-09-24 16:10:23,305 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 16:10:23,305 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 2
[2020-09-24 16:10:23,306 FATAL L256   erpolLogProxyWrapper]: Heuristic: FIRST
[2020-09-24 16:10:23,306 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 16:10:23,306 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 16:10:23,306 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 16:10:23,307 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 16:10:23,313 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-24 16:10:23,314 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1123916851]
[2020-09-24 16:10:23,316 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-24 16:10:23,317 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2020-09-24 16:10:23,318 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669859282]
[2020-09-24 16:10:23,324 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 2 states
[2020-09-24 16:10:23,324 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 16:10:23,341 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2020-09-24 16:10:23,342 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2020-09-24 16:10:23,345 INFO  L87              Difference]: Start difference. First operand 24 states. Second operand 2 states.
[2020-09-24 16:10:23,373 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 16:10:23,373 INFO  L93              Difference]: Finished difference Result 35 states and 39 transitions.
[2020-09-24 16:10:23,374 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. 
[2020-09-24 16:10:23,375 INFO  L78                 Accepts]: Start accepts. Automaton has 2 states. Word has length 12
[2020-09-24 16:10:23,376 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 16:10:23,386 INFO  L225             Difference]: With dead ends: 35
[2020-09-24 16:10:23,386 INFO  L226             Difference]: Without dead ends: 18
[2020-09-24 16:10:23,391 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2020-09-24 16:10:23,412 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 18 states.
[2020-09-24 16:10:23,431 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18.
[2020-09-24 16:10:23,433 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 18 states.
[2020-09-24 16:10:23,434 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions.
[2020-09-24 16:10:23,435 INFO  L78                 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 12
[2020-09-24 16:10:23,436 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 16:10:23,436 INFO  L479      AbstractCegarLoop]: Abstraction has 18 states and 19 transitions.
[2020-09-24 16:10:23,436 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 2 states.
[2020-09-24 16:10:23,436 INFO  L276                IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions.
[2020-09-24 16:10:23,437 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 13
[2020-09-24 16:10:23,437 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 16:10:23,437 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 16:10:23,438 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-09-24 16:10:23,438 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 16:10:23,438 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 16:10:23,438 INFO  L82        PathProgramCache]: Analyzing trace with hash -662656525, now seen corresponding path program 1 times
[2020-09-24 16:10:23,439 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 16:10:23,439 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1283495931]
[2020-09-24 16:10:23,439 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 16:10:23,457 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 16:10:23,464 FATAL L256   erpolLogProxyWrapper]: Difference in size: 0
[2020-09-24 16:10:23,464 FATAL L256   erpolLogProxyWrapper]: Difference in depth: 0
[2020-09-24 16:10:23,465 FATAL L256   erpolLogProxyWrapper]: Difference in width: 0
[2020-09-24 16:10:23,465 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 16:10:23,465 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 21
[2020-09-24 16:10:23,465 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 16:10:23,465 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 7
[2020-09-24 16:10:23,466 FATAL L256   erpolLogProxyWrapper]: Heuristic: FIRST
[2020-09-24 16:10:23,466 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-09-24 16:10:23,466 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 13
[2020-09-24 16:10:23,466 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 2
[2020-09-24 16:10:23,466 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 16:10:23,504 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 16:10:23,506 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 16:10:23,507 FATAL L256   erpolLogProxyWrapper]: Difference in size: 0
[2020-09-24 16:10:23,507 FATAL L256   erpolLogProxyWrapper]: Difference in depth: 0
[2020-09-24 16:10:23,508 FATAL L256   erpolLogProxyWrapper]: Difference in width: 0
[2020-09-24 16:10:23,508 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 16:10:23,508 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-09-24 16:10:23,508 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 16:10:23,509 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 1
[2020-09-24 16:10:23,509 FATAL L256   erpolLogProxyWrapper]: Heuristic: FIRST
[2020-09-24 16:10:23,509 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 16:10:23,509 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 16:10:23,510 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 16:10:23,510 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 16:10:23,513 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-24 16:10:23,514 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1283495931]
[2020-09-24 16:10:23,514 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-24 16:10:23,514 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-09-24 16:10:23,515 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592717153]
[2020-09-24 16:10:23,516 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-09-24 16:10:23,517 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 16:10:23,517 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-09-24 16:10:23,517 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-09-24 16:10:23,518 INFO  L87              Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 3 states.
[2020-09-24 16:10:23,563 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 16:10:23,563 INFO  L93              Difference]: Finished difference Result 34 states and 38 transitions.
[2020-09-24 16:10:23,564 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-09-24 16:10:23,564 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 12
[2020-09-24 16:10:23,565 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 16:10:23,566 INFO  L225             Difference]: With dead ends: 34
[2020-09-24 16:10:23,566 INFO  L226             Difference]: Without dead ends: 23
[2020-09-24 16:10:23,567 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-09-24 16:10:23,567 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 23 states.
[2020-09-24 16:10:23,572 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20.
[2020-09-24 16:10:23,572 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 20 states.
[2020-09-24 16:10:23,573 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions.
[2020-09-24 16:10:23,573 INFO  L78                 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 12
[2020-09-24 16:10:23,573 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 16:10:23,574 INFO  L479      AbstractCegarLoop]: Abstraction has 20 states and 21 transitions.
[2020-09-24 16:10:23,574 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-09-24 16:10:23,574 INFO  L276                IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions.
[2020-09-24 16:10:23,575 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 19
[2020-09-24 16:10:23,575 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 16:10:23,575 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 16:10:23,576 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-09-24 16:10:23,576 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 16:10:23,576 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 16:10:23,577 INFO  L82        PathProgramCache]: Analyzing trace with hash 1659803531, now seen corresponding path program 1 times
[2020-09-24 16:10:23,577 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 16:10:23,577 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1242238830]
[2020-09-24 16:10:23,577 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 16:10:23,605 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 16:10:23,621 FATAL L256   erpolLogProxyWrapper]: Difference in size: 0
[2020-09-24 16:10:23,621 FATAL L256   erpolLogProxyWrapper]: Difference in depth: 0
[2020-09-24 16:10:23,621 FATAL L256   erpolLogProxyWrapper]: Difference in width: 0
[2020-09-24 16:10:23,622 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 16:10:23,622 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 27
[2020-09-24 16:10:23,622 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 16:10:23,622 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 15
[2020-09-24 16:10:23,622 FATAL L256   erpolLogProxyWrapper]: Heuristic: FIRST
[2020-09-24 16:10:23,623 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-09-24 16:10:23,623 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 13
[2020-09-24 16:10:23,623 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 8
[2020-09-24 16:10:23,623 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 16:10:23,674 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 16:10:23,676 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 16:10:23,678 FATAL L256   erpolLogProxyWrapper]: Difference in size: 0
[2020-09-24 16:10:23,678 FATAL L256   erpolLogProxyWrapper]: Difference in depth: 0
[2020-09-24 16:10:23,679 FATAL L256   erpolLogProxyWrapper]: Difference in width: 0
[2020-09-24 16:10:23,679 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 16:10:23,679 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-09-24 16:10:23,679 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 16:10:23,679 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 1
[2020-09-24 16:10:23,680 FATAL L256   erpolLogProxyWrapper]: Heuristic: FIRST
[2020-09-24 16:10:23,680 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 16:10:23,680 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 16:10:23,680 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 16:10:23,680 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 16:10:23,685 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-24 16:10:23,685 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1242238830]
[2020-09-24 16:10:23,686 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 16:10:23,686 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5
[2020-09-24 16:10:23,686 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159379740]
[2020-09-24 16:10:23,687 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-09-24 16:10:23,687 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 16:10:23,687 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-09-24 16:10:23,688 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2020-09-24 16:10:23,688 INFO  L87              Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 5 states.
[2020-09-24 16:10:23,791 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 16:10:23,791 INFO  L93              Difference]: Finished difference Result 40 states and 44 transitions.
[2020-09-24 16:10:23,792 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2020-09-24 16:10:23,792 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 18
[2020-09-24 16:10:23,792 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 16:10:23,793 INFO  L225             Difference]: With dead ends: 40
[2020-09-24 16:10:23,793 INFO  L226             Difference]: Without dead ends: 29
[2020-09-24 16:10:23,794 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42
[2020-09-24 16:10:23,795 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 29 states.
[2020-09-24 16:10:23,799 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26.
[2020-09-24 16:10:23,800 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 26 states.
[2020-09-24 16:10:23,801 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions.
[2020-09-24 16:10:23,801 INFO  L78                 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 18
[2020-09-24 16:10:23,801 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 16:10:23,802 INFO  L479      AbstractCegarLoop]: Abstraction has 26 states and 27 transitions.
[2020-09-24 16:10:23,802 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-09-24 16:10:23,802 INFO  L276                IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions.
[2020-09-24 16:10:23,803 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 25
[2020-09-24 16:10:23,803 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 16:10:23,803 INFO  L422         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 16:10:23,803 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-09-24 16:10:23,804 INFO  L427      AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 16:10:23,804 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 16:10:23,804 INFO  L82        PathProgramCache]: Analyzing trace with hash 891941667, now seen corresponding path program 2 times
[2020-09-24 16:10:23,805 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 16:10:23,805 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2047942009]
[2020-09-24 16:10:23,805 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 16:10:23,822 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 16:10:23,848 FATAL L256   erpolLogProxyWrapper]: Difference in size: 0
[2020-09-24 16:10:23,849 FATAL L256   erpolLogProxyWrapper]: Difference in depth: 0
[2020-09-24 16:10:23,849 FATAL L256   erpolLogProxyWrapper]: Difference in width: 0
[2020-09-24 16:10:23,849 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 16:10:23,850 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 33
[2020-09-24 16:10:23,850 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 16:10:23,850 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 26
[2020-09-24 16:10:23,851 FATAL L256   erpolLogProxyWrapper]: Heuristic: FIRST
[2020-09-24 16:10:23,851 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 6
[2020-09-24 16:10:23,851 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 13
[2020-09-24 16:10:23,851 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 14
[2020-09-24 16:10:23,851 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 16:10:23,912 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 16:10:23,913 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 16:10:23,914 FATAL L256   erpolLogProxyWrapper]: Difference in size: 0
[2020-09-24 16:10:23,915 FATAL L256   erpolLogProxyWrapper]: Difference in depth: 0
[2020-09-24 16:10:23,915 FATAL L256   erpolLogProxyWrapper]: Difference in width: 0
[2020-09-24 16:10:23,915 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 16:10:23,915 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-09-24 16:10:23,916 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 16:10:23,916 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 1
[2020-09-24 16:10:23,916 FATAL L256   erpolLogProxyWrapper]: Heuristic: FIRST
[2020-09-24 16:10:23,916 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 16:10:23,917 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 16:10:23,917 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 16:10:23,917 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 16:10:23,921 INFO  L134       CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-24 16:10:23,921 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2047942009]
[2020-09-24 16:10:23,922 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 16:10:23,922 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7
[2020-09-24 16:10:23,922 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480302507]
[2020-09-24 16:10:23,923 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 7 states
[2020-09-24 16:10:23,923 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 16:10:23,923 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2020-09-24 16:10:23,924 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42
[2020-09-24 16:10:23,924 INFO  L87              Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 7 states.
[2020-09-24 16:10:24,084 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 16:10:24,085 INFO  L93              Difference]: Finished difference Result 45 states and 49 transitions.
[2020-09-24 16:10:24,086 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2020-09-24 16:10:24,086 INFO  L78                 Accepts]: Start accepts. Automaton has 7 states. Word has length 24
[2020-09-24 16:10:24,087 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 16:10:24,087 INFO  L225             Difference]: With dead ends: 45
[2020-09-24 16:10:24,088 INFO  L226             Difference]: Without dead ends: 34
[2020-09-24 16:10:24,090 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110
[2020-09-24 16:10:24,091 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 34 states.
[2020-09-24 16:10:24,097 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32.
[2020-09-24 16:10:24,100 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 32 states.
[2020-09-24 16:10:24,102 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions.
[2020-09-24 16:10:24,103 INFO  L78                 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 24
[2020-09-24 16:10:24,103 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 16:10:24,104 INFO  L479      AbstractCegarLoop]: Abstraction has 32 states and 33 transitions.
[2020-09-24 16:10:24,104 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 7 states.
[2020-09-24 16:10:24,104 INFO  L276                IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions.
[2020-09-24 16:10:24,106 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 31
[2020-09-24 16:10:24,106 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 16:10:24,106 INFO  L422         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 16:10:24,106 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2020-09-24 16:10:24,107 INFO  L427      AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 16:10:24,108 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 16:10:24,108 INFO  L82        PathProgramCache]: Analyzing trace with hash 1860713659, now seen corresponding path program 3 times
[2020-09-24 16:10:24,109 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 16:10:24,109 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1194968612]
[2020-09-24 16:10:24,110 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 16:10:24,146 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 16:10:24,177 FATAL L256   erpolLogProxyWrapper]: Difference in size: 0
[2020-09-24 16:10:24,178 FATAL L256   erpolLogProxyWrapper]: Difference in depth: 0
[2020-09-24 16:10:24,178 FATAL L256   erpolLogProxyWrapper]: Difference in width: 0
[2020-09-24 16:10:24,179 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 16:10:24,179 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 39
[2020-09-24 16:10:24,179 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 16:10:24,179 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 31
[2020-09-24 16:10:24,179 FATAL L256   erpolLogProxyWrapper]: Heuristic: FIRST
[2020-09-24 16:10:24,180 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 8
[2020-09-24 16:10:24,180 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 13
[2020-09-24 16:10:24,180 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 20
[2020-09-24 16:10:24,180 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 16:10:24,298 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 16:10:24,299 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 16:10:24,300 FATAL L256   erpolLogProxyWrapper]: Difference in size: 0
[2020-09-24 16:10:24,301 FATAL L256   erpolLogProxyWrapper]: Difference in depth: 0
[2020-09-24 16:10:24,301 FATAL L256   erpolLogProxyWrapper]: Difference in width: 0
[2020-09-24 16:10:24,301 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 16:10:24,301 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-09-24 16:10:24,301 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 16:10:24,302 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 1
[2020-09-24 16:10:24,302 FATAL L256   erpolLogProxyWrapper]: Heuristic: FIRST
[2020-09-24 16:10:24,302 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 16:10:24,302 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 16:10:24,302 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 16:10:24,302 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 16:10:24,306 INFO  L134       CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-24 16:10:24,306 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1194968612]
[2020-09-24 16:10:24,306 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 16:10:24,307 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9
[2020-09-24 16:10:24,307 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938431731]
[2020-09-24 16:10:24,307 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 9 states
[2020-09-24 16:10:24,308 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 16:10:24,308 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2020-09-24 16:10:24,308 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72
[2020-09-24 16:10:24,308 INFO  L87              Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 9 states.
[2020-09-24 16:10:24,468 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 16:10:24,469 INFO  L93              Difference]: Finished difference Result 44 states and 46 transitions.
[2020-09-24 16:10:24,469 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. 
[2020-09-24 16:10:24,470 INFO  L78                 Accepts]: Start accepts. Automaton has 9 states. Word has length 30
[2020-09-24 16:10:24,470 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 16:10:24,471 INFO  L225             Difference]: With dead ends: 44
[2020-09-24 16:10:24,471 INFO  L226             Difference]: Without dead ends: 39
[2020-09-24 16:10:24,472 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210
[2020-09-24 16:10:24,472 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 39 states.
[2020-09-24 16:10:24,481 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36.
[2020-09-24 16:10:24,482 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 36 states.
[2020-09-24 16:10:24,485 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions.
[2020-09-24 16:10:24,485 INFO  L78                 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 30
[2020-09-24 16:10:24,486 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 16:10:24,486 INFO  L479      AbstractCegarLoop]: Abstraction has 36 states and 37 transitions.
[2020-09-24 16:10:24,486 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 9 states.
[2020-09-24 16:10:24,486 INFO  L276                IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions.
[2020-09-24 16:10:24,488 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 36
[2020-09-24 16:10:24,489 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 16:10:24,489 INFO  L422         BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 16:10:24,489 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2020-09-24 16:10:24,489 INFO  L427      AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 16:10:24,490 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 16:10:24,490 INFO  L82        PathProgramCache]: Analyzing trace with hash 1338804338, now seen corresponding path program 1 times
[2020-09-24 16:10:24,491 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 16:10:24,491 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1310070641]
[2020-09-24 16:10:24,491 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 16:10:24,523 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 16:10:24,557 FATAL L256   erpolLogProxyWrapper]: Difference in size: 0
[2020-09-24 16:10:24,557 FATAL L256   erpolLogProxyWrapper]: Difference in depth: 0
[2020-09-24 16:10:24,558 FATAL L256   erpolLogProxyWrapper]: Difference in width: 0
[2020-09-24 16:10:24,558 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 16:10:24,558 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 44
[2020-09-24 16:10:24,558 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 16:10:24,558 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 33
[2020-09-24 16:10:24,559 FATAL L256   erpolLogProxyWrapper]: Heuristic: FIRST
[2020-09-24 16:10:24,559 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 10
[2020-09-24 16:10:24,559 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 13
[2020-09-24 16:10:24,559 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 25
[2020-09-24 16:10:24,560 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 16:10:24,649 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 16:10:24,650 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 16:10:24,651 FATAL L256   erpolLogProxyWrapper]: Difference in size: 0
[2020-09-24 16:10:24,651 FATAL L256   erpolLogProxyWrapper]: Difference in depth: 0
[2020-09-24 16:10:24,651 FATAL L256   erpolLogProxyWrapper]: Difference in width: 0
[2020-09-24 16:10:24,652 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 16:10:24,652 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-09-24 16:10:24,652 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 16:10:24,652 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 1
[2020-09-24 16:10:24,653 FATAL L256   erpolLogProxyWrapper]: Heuristic: FIRST
[2020-09-24 16:10:24,653 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 16:10:24,653 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 16:10:24,653 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 16:10:24,653 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 16:10:24,657 INFO  L134       CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-24 16:10:24,658 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1310070641]
[2020-09-24 16:10:24,658 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 16:10:24,658 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11
[2020-09-24 16:10:24,658 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484149820]
[2020-09-24 16:10:24,659 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 11 states
[2020-09-24 16:10:24,659 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 16:10:24,659 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2020-09-24 16:10:24,660 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110
[2020-09-24 16:10:24,660 INFO  L87              Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 11 states.
[2020-09-24 16:10:24,809 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 16:10:24,809 INFO  L93              Difference]: Finished difference Result 49 states and 52 transitions.
[2020-09-24 16:10:24,810 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. 
[2020-09-24 16:10:24,810 INFO  L78                 Accepts]: Start accepts. Automaton has 11 states. Word has length 35
[2020-09-24 16:10:24,810 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 16:10:24,813 INFO  L225             Difference]: With dead ends: 49
[2020-09-24 16:10:24,813 INFO  L226             Difference]: Without dead ends: 44
[2020-09-24 16:10:24,814 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342
[2020-09-24 16:10:24,815 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 44 states.
[2020-09-24 16:10:24,820 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41.
[2020-09-24 16:10:24,820 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 41 states.
[2020-09-24 16:10:24,821 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions.
[2020-09-24 16:10:24,822 INFO  L78                 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 35
[2020-09-24 16:10:24,822 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 16:10:24,822 INFO  L479      AbstractCegarLoop]: Abstraction has 41 states and 43 transitions.
[2020-09-24 16:10:24,822 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 11 states.
[2020-09-24 16:10:24,822 INFO  L276                IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions.
[2020-09-24 16:10:24,823 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 41
[2020-09-24 16:10:24,823 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 16:10:24,824 INFO  L422         BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 16:10:24,824 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5
[2020-09-24 16:10:24,824 INFO  L427      AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 16:10:24,824 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 16:10:24,825 INFO  L82        PathProgramCache]: Analyzing trace with hash -1859782885, now seen corresponding path program 2 times
[2020-09-24 16:10:24,825 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 16:10:24,825 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1933030240]
[2020-09-24 16:10:24,825 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 16:10:24,841 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 16:10:24,924 FATAL L256   erpolLogProxyWrapper]: Difference in size: 0
[2020-09-24 16:10:24,924 FATAL L256   erpolLogProxyWrapper]: Difference in depth: 0
[2020-09-24 16:10:24,924 FATAL L256   erpolLogProxyWrapper]: Difference in width: 0
[2020-09-24 16:10:24,924 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 16:10:24,929 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 49
[2020-09-24 16:10:24,929 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 16:10:24,929 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 82
[2020-09-24 16:10:24,929 FATAL L256   erpolLogProxyWrapper]: Heuristic: FIRST
[2020-09-24 16:10:24,929 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 12
[2020-09-24 16:10:24,930 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 13
[2020-09-24 16:10:24,930 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 30
[2020-09-24 16:10:24,930 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 16:10:25,055 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 16:10:25,056 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 16:10:25,057 FATAL L256   erpolLogProxyWrapper]: Difference in size: 0
[2020-09-24 16:10:25,057 FATAL L256   erpolLogProxyWrapper]: Difference in depth: 0
[2020-09-24 16:10:25,058 FATAL L256   erpolLogProxyWrapper]: Difference in width: 0
[2020-09-24 16:10:25,058 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 16:10:25,058 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-09-24 16:10:25,058 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 16:10:25,059 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 1
[2020-09-24 16:10:25,059 FATAL L256   erpolLogProxyWrapper]: Heuristic: FIRST
[2020-09-24 16:10:25,059 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 16:10:25,059 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 16:10:25,060 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 16:10:25,060 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 16:10:25,064 INFO  L134       CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-24 16:10:25,064 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1933030240]
[2020-09-24 16:10:25,064 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 16:10:25,065 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13
[2020-09-24 16:10:25,065 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475832283]
[2020-09-24 16:10:25,065 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 13 states
[2020-09-24 16:10:25,066 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 16:10:25,066 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants.
[2020-09-24 16:10:25,066 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156
[2020-09-24 16:10:25,067 INFO  L87              Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 13 states.
[2020-09-24 16:10:25,289 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 16:10:25,289 INFO  L93              Difference]: Finished difference Result 54 states and 58 transitions.
[2020-09-24 16:10:25,289 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. 
[2020-09-24 16:10:25,290 INFO  L78                 Accepts]: Start accepts. Automaton has 13 states. Word has length 40
[2020-09-24 16:10:25,290 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 16:10:25,291 INFO  L225             Difference]: With dead ends: 54
[2020-09-24 16:10:25,291 INFO  L226             Difference]: Without dead ends: 49
[2020-09-24 16:10:25,292 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=178, Invalid=328, Unknown=0, NotChecked=0, Total=506
[2020-09-24 16:10:25,293 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 49 states.
[2020-09-24 16:10:25,297 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46.
[2020-09-24 16:10:25,297 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 46 states.
[2020-09-24 16:10:25,299 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions.
[2020-09-24 16:10:25,299 INFO  L78                 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 40
[2020-09-24 16:10:25,299 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 16:10:25,299 INFO  L479      AbstractCegarLoop]: Abstraction has 46 states and 49 transitions.
[2020-09-24 16:10:25,300 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 13 states.
[2020-09-24 16:10:25,300 INFO  L276                IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions.
[2020-09-24 16:10:25,301 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 46
[2020-09-24 16:10:25,301 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 16:10:25,301 INFO  L422         BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 16:10:25,302 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6
[2020-09-24 16:10:25,302 INFO  L427      AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 16:10:25,302 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 16:10:25,302 INFO  L82        PathProgramCache]: Analyzing trace with hash 350505490, now seen corresponding path program 3 times
[2020-09-24 16:10:25,303 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 16:10:25,303 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2080226456]
[2020-09-24 16:10:25,303 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 16:10:25,318 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 16:10:25,365 FATAL L256   erpolLogProxyWrapper]: Difference in size: 0
[2020-09-24 16:10:25,366 FATAL L256   erpolLogProxyWrapper]: Difference in depth: 0
[2020-09-24 16:10:25,366 FATAL L256   erpolLogProxyWrapper]: Difference in width: 0
[2020-09-24 16:10:25,366 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 16:10:25,367 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 54
[2020-09-24 16:10:25,367 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 16:10:25,367 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 47
[2020-09-24 16:10:25,367 FATAL L256   erpolLogProxyWrapper]: Heuristic: FIRST
[2020-09-24 16:10:25,367 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 14
[2020-09-24 16:10:25,368 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 13
[2020-09-24 16:10:25,368 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 35
[2020-09-24 16:10:25,368 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 16:10:25,521 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 16:10:25,522 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 16:10:25,523 FATAL L256   erpolLogProxyWrapper]: Difference in size: 0
[2020-09-24 16:10:25,523 FATAL L256   erpolLogProxyWrapper]: Difference in depth: 0
[2020-09-24 16:10:25,524 FATAL L256   erpolLogProxyWrapper]: Difference in width: 0
[2020-09-24 16:10:25,524 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 16:10:25,524 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-09-24 16:10:25,524 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 16:10:25,524 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 1
[2020-09-24 16:10:25,525 FATAL L256   erpolLogProxyWrapper]: Heuristic: FIRST
[2020-09-24 16:10:25,525 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 16:10:25,525 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 16:10:25,525 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 16:10:25,525 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 16:10:25,533 INFO  L134       CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-24 16:10:25,533 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2080226456]
[2020-09-24 16:10:25,533 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 16:10:25,534 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15
[2020-09-24 16:10:25,534 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995643698]
[2020-09-24 16:10:25,535 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 15 states
[2020-09-24 16:10:25,536 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 16:10:25,536 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants.
[2020-09-24 16:10:25,536 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210
[2020-09-24 16:10:25,538 INFO  L87              Difference]: Start difference. First operand 46 states and 49 transitions. Second operand 15 states.
[2020-09-24 16:10:25,799 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 16:10:25,799 INFO  L93              Difference]: Finished difference Result 59 states and 64 transitions.
[2020-09-24 16:10:25,800 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. 
[2020-09-24 16:10:25,800 INFO  L78                 Accepts]: Start accepts. Automaton has 15 states. Word has length 45
[2020-09-24 16:10:25,800 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 16:10:25,801 INFO  L225             Difference]: With dead ends: 59
[2020-09-24 16:10:25,801 INFO  L226             Difference]: Without dead ends: 54
[2020-09-24 16:10:25,802 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702
[2020-09-24 16:10:25,802 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 54 states.
[2020-09-24 16:10:25,807 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51.
[2020-09-24 16:10:25,807 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 51 states.
[2020-09-24 16:10:25,808 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions.
[2020-09-24 16:10:25,808 INFO  L78                 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 45
[2020-09-24 16:10:25,808 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 16:10:25,808 INFO  L479      AbstractCegarLoop]: Abstraction has 51 states and 55 transitions.
[2020-09-24 16:10:25,809 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 15 states.
[2020-09-24 16:10:25,809 INFO  L276                IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions.
[2020-09-24 16:10:25,809 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 51
[2020-09-24 16:10:25,810 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 16:10:25,810 INFO  L422         BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 16:10:25,810 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7
[2020-09-24 16:10:25,810 INFO  L427      AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 16:10:25,810 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 16:10:25,811 INFO  L82        PathProgramCache]: Analyzing trace with hash -892978821, now seen corresponding path program 4 times
[2020-09-24 16:10:25,811 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 16:10:25,811 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1625472725]
[2020-09-24 16:10:25,811 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 16:10:25,824 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 16:10:25,881 FATAL L256   erpolLogProxyWrapper]: Difference in size: 0
[2020-09-24 16:10:25,881 FATAL L256   erpolLogProxyWrapper]: Difference in depth: 0
[2020-09-24 16:10:25,881 FATAL L256   erpolLogProxyWrapper]: Difference in width: 0
[2020-09-24 16:10:25,881 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 16:10:25,882 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 59
[2020-09-24 16:10:25,882 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 16:10:25,882 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 57
[2020-09-24 16:10:25,882 FATAL L256   erpolLogProxyWrapper]: Heuristic: FIRST
[2020-09-24 16:10:25,882 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 16
[2020-09-24 16:10:25,883 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 13
[2020-09-24 16:10:25,883 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 40
[2020-09-24 16:10:25,883 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 16:10:26,076 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 16:10:26,077 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 16:10:26,078 FATAL L256   erpolLogProxyWrapper]: Difference in size: 0
[2020-09-24 16:10:26,078 FATAL L256   erpolLogProxyWrapper]: Difference in depth: 0
[2020-09-24 16:10:26,079 FATAL L256   erpolLogProxyWrapper]: Difference in width: 0
[2020-09-24 16:10:26,079 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 16:10:26,079 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-09-24 16:10:26,079 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 16:10:26,079 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 1
[2020-09-24 16:10:26,080 FATAL L256   erpolLogProxyWrapper]: Heuristic: FIRST
[2020-09-24 16:10:26,080 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 16:10:26,080 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 16:10:26,080 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 16:10:26,080 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 16:10:26,085 INFO  L134       CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-24 16:10:26,085 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1625472725]
[2020-09-24 16:10:26,086 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 16:10:26,086 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17
[2020-09-24 16:10:26,086 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493031884]
[2020-09-24 16:10:26,086 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 17 states
[2020-09-24 16:10:26,087 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 16:10:26,087 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants.
[2020-09-24 16:10:26,087 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272
[2020-09-24 16:10:26,088 INFO  L87              Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 17 states.
[2020-09-24 16:10:26,392 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 16:10:26,393 INFO  L93              Difference]: Finished difference Result 61 states and 66 transitions.
[2020-09-24 16:10:26,393 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. 
[2020-09-24 16:10:26,393 INFO  L78                 Accepts]: Start accepts. Automaton has 17 states. Word has length 50
[2020-09-24 16:10:26,394 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 16:10:26,395 INFO  L225             Difference]: With dead ends: 61
[2020-09-24 16:10:26,395 INFO  L226             Difference]: Without dead ends: 56
[2020-09-24 16:10:26,397 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=318, Invalid=612, Unknown=0, NotChecked=0, Total=930
[2020-09-24 16:10:26,397 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 56 states.
[2020-09-24 16:10:26,405 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56.
[2020-09-24 16:10:26,405 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 56 states.
[2020-09-24 16:10:26,408 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions.
[2020-09-24 16:10:26,409 INFO  L78                 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 50
[2020-09-24 16:10:26,409 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 16:10:26,409 INFO  L479      AbstractCegarLoop]: Abstraction has 56 states and 61 transitions.
[2020-09-24 16:10:26,409 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 17 states.
[2020-09-24 16:10:26,409 INFO  L276                IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions.
[2020-09-24 16:10:26,411 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 56
[2020-09-24 16:10:26,411 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 16:10:26,411 INFO  L422         BasicCegarLoop]: trace histogram [8, 8, 8, 8, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 16:10:26,412 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8
[2020-09-24 16:10:26,412 INFO  L427      AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 16:10:26,412 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 16:10:26,412 INFO  L82        PathProgramCache]: Analyzing trace with hash 586056626, now seen corresponding path program 5 times
[2020-09-24 16:10:26,412 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 16:10:26,413 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1318113091]
[2020-09-24 16:10:26,413 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 16:10:26,434 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2020-09-24 16:10:26,436 INFO  L174   FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace
[2020-09-24 16:10:26,437 INFO  L520         BasicCegarLoop]: Counterexample might be feasible
[2020-09-24 16:10:26,442 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9
[2020-09-24 16:10:26,468 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 04:10:26 BoogieIcfgContainer
[2020-09-24 16:10:26,468 INFO  L132        PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-09-24 16:10:26,472 INFO  L168              Benchmark]: Toolchain (without parser) took 4188.01 ms. Allocated memory was 140.5 MB in the beginning and 245.9 MB in the end (delta: 105.4 MB). Free memory was 102.8 MB in the beginning and 198.4 MB in the end (delta: -95.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB.
[2020-09-24 16:10:26,474 INFO  L168              Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 140.5 MB. Free memory was 120.8 MB in the beginning and 120.4 MB in the end (delta: 419.4 kB). Peak memory consumption was 419.4 kB. Max. memory is 7.1 GB.
[2020-09-24 16:10:26,475 INFO  L168              Benchmark]: CACSL2BoogieTranslator took 318.58 ms. Allocated memory is still 140.5 MB. Free memory was 101.9 MB in the beginning and 92.7 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB.
[2020-09-24 16:10:26,476 INFO  L168              Benchmark]: Boogie Preprocessor took 109.97 ms. Allocated memory was 140.5 MB in the beginning and 203.9 MB in the end (delta: 63.4 MB). Free memory was 92.7 MB in the beginning and 182.8 MB in the end (delta: -90.1 MB). Peak memory consumption was 13.3 MB. Max. memory is 7.1 GB.
[2020-09-24 16:10:26,483 INFO  L168              Benchmark]: RCFGBuilder took 272.16 ms. Allocated memory is still 203.9 MB. Free memory was 182.8 MB in the beginning and 171.5 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.3 MB. Max. memory is 7.1 GB.
[2020-09-24 16:10:26,484 INFO  L168              Benchmark]: TraceAbstraction took 3476.90 ms. Allocated memory was 203.9 MB in the beginning and 245.9 MB in the end (delta: 41.9 MB). Free memory was 171.5 MB in the beginning and 198.4 MB in the end (delta: -26.9 MB). Peak memory consumption was 15.0 MB. Max. memory is 7.1 GB.
[2020-09-24 16:10:26,496 INFO  L336   ainManager$Toolchain]: #######################  End [Toolchain 1] #######################
 --- Results ---
 * Results from de.uni_freiburg.informatik.ultimate.core:
  - StatisticsResult: Toolchain Benchmarks
    Benchmark results are:
 * CDTParser took 0.23 ms. Allocated memory is still 140.5 MB. Free memory was 120.8 MB in the beginning and 120.4 MB in the end (delta: 419.4 kB). Peak memory consumption was 419.4 kB. Max. memory is 7.1 GB.
 * CACSL2BoogieTranslator took 318.58 ms. Allocated memory is still 140.5 MB. Free memory was 101.9 MB in the beginning and 92.7 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB.
 * Boogie Preprocessor took 109.97 ms. Allocated memory was 140.5 MB in the beginning and 203.9 MB in the end (delta: 63.4 MB). Free memory was 92.7 MB in the beginning and 182.8 MB in the end (delta: -90.1 MB). Peak memory consumption was 13.3 MB. Max. memory is 7.1 GB.
 * RCFGBuilder took 272.16 ms. Allocated memory is still 203.9 MB. Free memory was 182.8 MB in the beginning and 171.5 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.3 MB. Max. memory is 7.1 GB.
 * TraceAbstraction took 3476.90 ms. Allocated memory was 203.9 MB in the beginning and 245.9 MB in the end (delta: 41.9 MB). Free memory was 171.5 MB in the beginning and 198.4 MB in the end (delta: -26.9 MB). Peak memory consumption was 15.0 MB. Max. memory is 7.1 GB.
 * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
  - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable
    a call of __VERIFIER_error() is reachable
We found a FailurePath: 
[L12]              int i, sn=0;
[L13]              i=1
[L13]  COND TRUE   i<=8
[L14]  COND TRUE   i<4
[L15]              sn = sn + (2)
[L13]              i++
[L13]  COND TRUE   i<=8
[L14]  COND TRUE   i<4
[L15]              sn = sn + (2)
[L13]              i++
[L13]  COND TRUE   i<=8
[L14]  COND TRUE   i<4
[L15]              sn = sn + (2)
[L13]              i++
[L13]  COND TRUE   i<=8
[L14]  COND FALSE  !(i<4)
[L13]              i++
[L13]  COND TRUE   i<=8
[L14]  COND FALSE  !(i<4)
[L13]              i++
[L13]  COND TRUE   i<=8
[L14]  COND FALSE  !(i<4)
[L13]              i++
[L13]  COND TRUE   i<=8
[L14]  COND FALSE  !(i<4)
[L13]              i++
[L13]  COND TRUE   i<=8
[L14]  COND FALSE  !(i<4)
[L13]              i++
[L13]  COND FALSE  !(i<=8)
[L17]  CALL        __VERIFIER_assert(sn==8*(2) || sn == 0)
[L4]   COND TRUE   !(cond)
[L5]               __VERIFIER_error()

  - StatisticsResult: Ultimate Automizer benchmark data
    CFG has 4 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.3s, OverallIterations: 10, TraceHistogramMax: 8, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 141 SDtfs, 151 SDslu, 517 SDs, 0 SdLazy, 363 SolverSat, 73 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 156 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=56occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 9 MinimizatonAttempts, 20 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 321 NumberOfCodeBlocks, 321 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 257 ConstructedInterpolants, 0 QuantifiedInterpolants, 21583 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 2 PerfectInterpolantSequences, 0/324 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available
RESULT: Ultimate proved your program to be incorrect!
Received shutdown request...