/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 enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.2 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-acceleration/underapprox_1-1.c
--------------------------------------------------------------------------------
This is Ultimate 0.1.25-c90d42b
[2020-09-25 04:35:17,669 INFO L177 SettingsManager]: Resetting all preferences to default values...
[2020-09-25 04:35:17,673 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values
[2020-09-25 04:35:17,703 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-09-25 04:35:17,704 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-09-25 04:35:17,705 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-09-25 04:35:17,707 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-09-25 04:35:17,709 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values
[2020-09-25 04:35:17,711 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-09-25 04:35:17,712 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-09-25 04:35:17,713 INFO L181 SettingsManager]: Resetting Sifa preferences to default values
[2020-09-25 04:35:17,714 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-09-25 04:35:17,715 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-09-25 04:35:17,716 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-09-25 04:35:17,717 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-09-25 04:35:17,718 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-09-25 04:35:17,719 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-09-25 04:35:17,721 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-09-25 04:35:17,723 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-09-25 04:35:17,725 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values
[2020-09-25 04:35:17,726 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-09-25 04:35:17,728 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-09-25 04:35:17,729 INFO L181 SettingsManager]: Resetting Referee preferences to default values
[2020-09-25 04:35:17,730 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-09-25 04:35:17,735 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-09-25 04:35:17,736 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-09-25 04:35:17,736 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-09-25 04:35:17,737 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-09-25 04:35:17,738 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-09-25 04:35:17,741 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-09-25 04:35:17,741 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-09-25 04:35:17,742 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-09-25 04:35:17,745 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-09-25 04:35:17,746 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values
[2020-09-25 04:35:17,748 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-09-25 04:35:17,748 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values
[2020-09-25 04:35:17,749 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-09-25 04:35:17,749 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-09-25 04:35:17,750 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values
[2020-09-25 04:35:17,751 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values
[2020-09-25 04:35:17,752 INFO L188 SettingsManager]: Finished resetting all preferences to default values...
[2020-09-25 04:35:17,753 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
[2020-09-25 04:35:17,779 INFO L113 SettingsManager]: Loading preferences was successful
[2020-09-25 04:35:17,779 INFO L115 SettingsManager]: Preferences different from defaults after loading the file:
[2020-09-25 04:35:17,781 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-09-25 04:35:17,781 INFO L138 SettingsManager]: * Create parallel compositions if possible=false
[2020-09-25 04:35:17,781 INFO L138 SettingsManager]: * Use SBE=true
[2020-09-25 04:35:17,782 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-09-25 04:35:17,782 INFO L138 SettingsManager]: * sizeof long=4
[2020-09-25 04:35:17,782 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true
[2020-09-25 04:35:17,782 INFO L138 SettingsManager]: * sizeof POINTER=4
[2020-09-25 04:35:17,782 INFO L138 SettingsManager]: * Check division by zero=IGNORE
[2020-09-25 04:35:17,783 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE
[2020-09-25 04:35:17,783 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-09-25 04:35:17,783 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE
[2020-09-25 04:35:17,783 INFO L138 SettingsManager]: * sizeof long double=12
[2020-09-25 04:35:17,783 INFO L138 SettingsManager]: * Check if freed pointer was valid=false
[2020-09-25 04:35:17,784 INFO L138 SettingsManager]: * Use constant arrays=true
[2020-09-25 04:35:17,784 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE
[2020-09-25 04:35:17,784 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-09-25 04:35:17,784 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements
[2020-09-25 04:35:17,784 INFO L138 SettingsManager]: * To the following directory=./dump/
[2020-09-25 04:35:17,785 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode
[2020-09-25 04:35:17,785 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-09-25 04:35:17,785 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-09-25 04:35:17,785 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP
[2020-09-25 04:35:17,786 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-09-25 04:35:17,786 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL
[2020-09-25 04:35:17,786 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-09-25 04:35:17,786 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-09-25 04:35:17,786 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE
[2020-09-25 04:35:17,787 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;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;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;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;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;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;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;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;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;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;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;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true;
[2020-09-25 04:35:18,332 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp
[2020-09-25 04:35:18,360 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-09-25 04:35:18,365 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-09-25 04:35:18,368 INFO L271 PluginConnector]: Initializing CDTParser...
[2020-09-25 04:35:18,370 INFO L275 PluginConnector]: CDTParser initialized
[2020-09-25 04:35:18,371 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/underapprox_1-1.c
[2020-09-25 04:35:18,472 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f2dff323b/6b0aaaafa3304fd480ab3b979e7c48b2/FLAG4de95782f
[2020-09-25 04:35:19,036 INFO L306 CDTParser]: Found 1 translation units.
[2020-09-25 04:35:19,037 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/underapprox_1-1.c
[2020-09-25 04:35:19,046 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f2dff323b/6b0aaaafa3304fd480ab3b979e7c48b2/FLAG4de95782f
[2020-09-25 04:35:19,369 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f2dff323b/6b0aaaafa3304fd480ab3b979e7c48b2
[2020-09-25 04:35:19,388 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-09-25 04:35:19,395 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements.
[2020-09-25 04:35:19,399 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-09-25 04:35:19,399 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-09-25 04:35:19,403 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized
[2020-09-25 04:35:19,405 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 04:35:19" (1/1) ...
[2020-09-25 04:35:19,410 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@577f93b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:35:19, skipping insertion in model container
[2020-09-25 04:35:19,411 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 04:35:19" (1/1) ...
[2020-09-25 04:35:19,421 INFO L145 MainTranslator]: Starting translation in SV-COMP mode
[2020-09-25 04:35:19,450 INFO L178 MainTranslator]: Built tables and reachable declarations
[2020-09-25 04:35:19,672 INFO L206 PostProcessor]: Analyzing one entry point: main
[2020-09-25 04:35:19,677 INFO L203 MainTranslator]: Completed pre-run
[2020-09-25 04:35:19,696 INFO L206 PostProcessor]: Analyzing one entry point: main
[2020-09-25 04:35:19,712 INFO L208 MainTranslator]: Completed translation
[2020-09-25 04:35:19,712 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:35:19 WrapperNode
[2020-09-25 04:35:19,712 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-09-25 04:35:19,713 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-09-25 04:35:19,714 INFO L271 PluginConnector]: Initializing Boogie Preprocessor...
[2020-09-25 04:35:19,714 INFO L275 PluginConnector]: Boogie Preprocessor initialized
[2020-09-25 04:35:19,728 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:35:19" (1/1) ...
[2020-09-25 04:35:19,728 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:35:19" (1/1) ...
[2020-09-25 04:35:19,734 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:35:19" (1/1) ...
[2020-09-25 04:35:19,734 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:35:19" (1/1) ...
[2020-09-25 04:35:19,822 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:35:19" (1/1) ...
[2020-09-25 04:35:19,830 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:35:19" (1/1) ...
[2020-09-25 04:35:19,831 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:35:19" (1/1) ...
[2020-09-25 04:35:19,832 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-09-25 04:35:19,833 INFO L113 PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-09-25 04:35:19,833 INFO L271 PluginConnector]: Initializing RCFGBuilder...
[2020-09-25 04:35:19,833 INFO L275 PluginConnector]: RCFGBuilder initialized
[2020-09-25 04:35:19,834 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:35:19" (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
[2020-09-25 04:35:19,916 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-09-25 04:35:19,916 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-09-25 04:35:19,916 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2020-09-25 04:35:19,916 INFO L138 BoogieDeclarations]: Found implementation of procedure main
[2020-09-25 04:35:19,917 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-09-25 04:35:19,917 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2020-09-25 04:35:19,917 INFO L130 BoogieDeclarations]: Found specification of procedure main
[2020-09-25 04:35:19,917 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-09-25 04:35:19,917 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-09-25 04:35:20,106 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-09-25 04:35:20,107 INFO L295 CfgBuilder]: Removed 1 assume(true) statements.
[2020-09-25 04:35:20,111 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 04:35:20 BoogieIcfgContainer
[2020-09-25 04:35:20,111 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-09-25 04:35:20,113 INFO L113 PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-09-25 04:35:20,113 INFO L271 PluginConnector]: Initializing TraceAbstraction...
[2020-09-25 04:35:20,117 INFO L275 PluginConnector]: TraceAbstraction initialized
[2020-09-25 04:35:20,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 04:35:19" (1/3) ...
[2020-09-25 04:35:20,118 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c164c20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 04:35:20, skipping insertion in model container
[2020-09-25 04:35:20,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:35:19" (2/3) ...
[2020-09-25 04:35:20,119 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c164c20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 04:35:20, skipping insertion in model container
[2020-09-25 04:35:20,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 04:35:20" (3/3) ...
[2020-09-25 04:35:20,122 INFO L109 eAbstractionObserver]: Analyzing ICFG underapprox_1-1.c
[2020-09-25 04:35:20,134 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-09-25 04:35:20,145 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-09-25 04:35:20,168 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-09-25 04:35:20,200 INFO L375 AbstractCegarLoop]: Interprodecural is true
[2020-09-25 04:35:20,200 INFO L376 AbstractCegarLoop]: Hoare is true
[2020-09-25 04:35:20,200 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-09-25 04:35:20,200 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-09-25 04:35:20,201 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-09-25 04:35:20,201 INFO L380 AbstractCegarLoop]: Difference is false
[2020-09-25 04:35:20,201 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-09-25 04:35:20,201 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-09-25 04:35:20,222 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states.
[2020-09-25 04:35:20,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12
[2020-09-25 04:35:20,230 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-25 04:35:20,231 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-25 04:35:20,231 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-25 04:35:20,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-25 04:35:20,239 INFO L82 PathProgramCache]: Analyzing trace with hash 493765703, now seen corresponding path program 1 times
[2020-09-25 04:35:20,248 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-25 04:35:20,249 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [958702139]
[2020-09-25 04:35:20,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-25 04:35:20,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 04:35:20,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 04:35:20,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 04:35:20,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 04:35:20,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20
[2020-09-25 04:35:20,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-09-25 04:35:20,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 132
[2020-09-25 04:35:20,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL
[2020-09-25 04:35:20,504 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2
[2020-09-25 04:35:20,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-25 04:35:20,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13
[2020-09-25 04:35:20,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-25 04:35:20,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4
[2020-09-25 04:35:20,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-25 04:35:20,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 04:35:20,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 04:35:20,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 04:35:20,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-09-25 04:35:20,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 04:35:20,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3
[2020-09-25 04:35:20,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL
[2020-09-25 04:35:20,553 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2
[2020-09-25 04:35:20,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-25 04:35:20,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 04:35:20,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-25 04:35:20,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 04:35:20,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-25 04:35:20,561 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [958702139]
[2020-09-25 04:35:20,563 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-25 04:35:20,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2020-09-25 04:35:20,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261664180]
[2020-09-25 04:35:20,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states
[2020-09-25 04:35:20,569 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-25 04:35:20,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2020-09-25 04:35:20,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2020-09-25 04:35:20,586 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states.
[2020-09-25 04:35:20,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-25 04:35:20,609 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions.
[2020-09-25 04:35:20,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states.
[2020-09-25 04:35:20,611 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11
[2020-09-25 04:35:20,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-25 04:35:20,620 INFO L225 Difference]: With dead ends: 33
[2020-09-25 04:35:20,620 INFO L226 Difference]: Without dead ends: 16
[2020-09-25 04:35:20,624 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
[2020-09-25 04:35:20,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states.
[2020-09-25 04:35:20,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16.
[2020-09-25 04:35:20,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states.
[2020-09-25 04:35:20,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions.
[2020-09-25 04:35:20,664 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 11
[2020-09-25 04:35:20,665 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-25 04:35:20,665 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions.
[2020-09-25 04:35:20,665 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states.
[2020-09-25 04:35:20,665 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions.
[2020-09-25 04:35:20,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12
[2020-09-25 04:35:20,666 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-25 04:35:20,666 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-25 04:35:20,667 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-09-25 04:35:20,667 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-25 04:35:20,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-25 04:35:20,667 INFO L82 PathProgramCache]: Analyzing trace with hash 486377535, now seen corresponding path program 1 times
[2020-09-25 04:35:20,668 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-25 04:35:20,668 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1023508911]
[2020-09-25 04:35:20,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-25 04:35:20,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 04:35:20,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 04:35:20,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 04:35:20,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 04:35:20,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20
[2020-09-25 04:35:20,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-09-25 04:35:20,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 142
[2020-09-25 04:35:20,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL
[2020-09-25 04:35:20,832 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2
[2020-09-25 04:35:20,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-09-25 04:35:20,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11
[2020-09-25 04:35:20,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3
[2020-09-25 04:35:20,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 04:35:20,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-25 04:35:20,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 04:35:20,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 04:35:20,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 04:35:20,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-09-25 04:35:20,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 04:35:20,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8
[2020-09-25 04:35:20,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL
[2020-09-25 04:35:20,972 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2
[2020-09-25 04:35:20,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-25 04:35:20,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 04:35:20,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-25 04:35:20,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 04:35:20,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-25 04:35:20,980 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1023508911]
[2020-09-25 04:35:20,983 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-25 04:35:20,984 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-09-25 04:35:20,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856540218]
[2020-09-25 04:35:20,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-09-25 04:35:20,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-25 04:35:20,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-09-25 04:35:20,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-09-25 04:35:20,991 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 3 states.
[2020-09-25 04:35:21,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-25 04:35:21,123 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions.
[2020-09-25 04:35:21,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states.
[2020-09-25 04:35:21,124 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11
[2020-09-25 04:35:21,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-25 04:35:21,125 INFO L225 Difference]: With dead ends: 24
[2020-09-25 04:35:21,125 INFO L226 Difference]: Without dead ends: 19
[2020-09-25 04:35:21,126 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
[2020-09-25 04:35:21,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states.
[2020-09-25 04:35:21,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17.
[2020-09-25 04:35:21,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states.
[2020-09-25 04:35:21,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions.
[2020-09-25 04:35:21,140 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 11
[2020-09-25 04:35:21,141 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-25 04:35:21,141 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions.
[2020-09-25 04:35:21,141 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-09-25 04:35:21,141 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions.
[2020-09-25 04:35:21,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17
[2020-09-25 04:35:21,142 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-25 04:35:21,143 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-25 04:35:21,143 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-09-25 04:35:21,144 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-25 04:35:21,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-25 04:35:21,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1748013841, now seen corresponding path program 1 times
[2020-09-25 04:35:21,145 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-25 04:35:21,146 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1182917750]
[2020-09-25 04:35:21,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-25 04:35:21,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 04:35:21,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 04:35:21,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 04:35:21,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 04:35:21,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25
[2020-09-25 04:35:21,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-09-25 04:35:21,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 429
[2020-09-25 04:35:21,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL
[2020-09-25 04:35:21,605 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2
[2020-09-25 04:35:21,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-09-25 04:35:21,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11
[2020-09-25 04:35:21,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8
[2020-09-25 04:35:21,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 04:35:21,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-25 04:35:21,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 04:35:21,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 04:35:21,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 04:35:21,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-09-25 04:35:21,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 04:35:21,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4
[2020-09-25 04:35:21,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL
[2020-09-25 04:35:21,716 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2
[2020-09-25 04:35:21,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-25 04:35:21,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 04:35:21,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-25 04:35:21,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 04:35:21,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-25 04:35:21,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1182917750]
[2020-09-25 04:35:21,725 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-25 04:35:21,725 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5
[2020-09-25 04:35:21,726 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685961349]
[2020-09-25 04:35:21,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-09-25 04:35:21,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-25 04:35:21,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-09-25 04:35:21,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2020-09-25 04:35:21,729 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 5 states.
[2020-09-25 04:35:21,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-25 04:35:21,801 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions.
[2020-09-25 04:35:21,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states.
[2020-09-25 04:35:21,802 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16
[2020-09-25 04:35:21,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-25 04:35:21,803 INFO L225 Difference]: With dead ends: 29
[2020-09-25 04:35:21,803 INFO L226 Difference]: Without dead ends: 24
[2020-09-25 04:35:21,804 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42
[2020-09-25 04:35:21,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states.
[2020-09-25 04:35:21,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22.
[2020-09-25 04:35:21,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states.
[2020-09-25 04:35:21,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions.
[2020-09-25 04:35:21,810 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 16
[2020-09-25 04:35:21,810 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-25 04:35:21,811 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions.
[2020-09-25 04:35:21,811 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-09-25 04:35:21,811 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions.
[2020-09-25 04:35:21,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2020-09-25 04:35:21,812 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-25 04:35:21,812 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-25 04:35:21,812 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-09-25 04:35:21,813 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-25 04:35:21,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-25 04:35:21,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1960900159, now seen corresponding path program 2 times
[2020-09-25 04:35:21,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-25 04:35:21,814 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1914021314]
[2020-09-25 04:35:21,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-25 04:35:21,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 04:35:21,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 04:35:21,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 04:35:22,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 04:35:22,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30
[2020-09-25 04:35:22,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-09-25 04:35:22,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 528
[2020-09-25 04:35:22,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL
[2020-09-25 04:35:22,355 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2
[2020-09-25 04:35:22,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6
[2020-09-25 04:35:22,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12
[2020-09-25 04:35:22,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17
[2020-09-25 04:35:22,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 04:35:22,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-25 04:35:22,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 04:35:22,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 04:35:22,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 04:35:22,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-09-25 04:35:22,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 04:35:22,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2
[2020-09-25 04:35:22,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL
[2020-09-25 04:35:22,441 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2
[2020-09-25 04:35:22,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-25 04:35:22,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 04:35:22,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-25 04:35:22,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 04:35:22,445 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-25 04:35:22,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1914021314]
[2020-09-25 04:35:22,446 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-25 04:35:22,446 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7
[2020-09-25 04:35:22,447 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88736510]
[2020-09-25 04:35:22,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states
[2020-09-25 04:35:22,448 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-25 04:35:22,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2020-09-25 04:35:22,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42
[2020-09-25 04:35:22,448 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 7 states.
[2020-09-25 04:35:24,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-25 04:35:24,593 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions.
[2020-09-25 04:35:24,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states.
[2020-09-25 04:35:24,594 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21
[2020-09-25 04:35:24,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-25 04:35:24,595 INFO L225 Difference]: With dead ends: 36
[2020-09-25 04:35:24,595 INFO L226 Difference]: Without dead ends: 31
[2020-09-25 04:35:24,596 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56
[2020-09-25 04:35:24,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states.
[2020-09-25 04:35:24,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27.
[2020-09-25 04:35:24,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states.
[2020-09-25 04:35:24,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions.
[2020-09-25 04:35:24,602 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 21
[2020-09-25 04:35:24,602 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-25 04:35:24,603 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions.
[2020-09-25 04:35:24,603 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states.
[2020-09-25 04:35:24,603 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions.
[2020-09-25 04:35:24,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27
[2020-09-25 04:35:24,604 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-25 04:35:24,604 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-25 04:35:24,604 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2020-09-25 04:35:24,604 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-25 04:35:24,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-25 04:35:24,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1793113839, now seen corresponding path program 3 times
[2020-09-25 04:35:24,605 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-25 04:35:24,606 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [94103202]
[2020-09-25 04:35:24,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-25 04:35:24,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 04:35:24,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 04:35:24,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 04:35:25,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 04:35:25,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35
[2020-09-25 04:35:25,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-09-25 04:35:25,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 930
[2020-09-25 04:35:25,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL
[2020-09-25 04:35:25,550 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2
[2020-09-25 04:35:25,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7
[2020-09-25 04:35:25,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12
[2020-09-25 04:35:25,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22
[2020-09-25 04:35:25,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 04:35:25,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-25 04:35:25,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 04:35:25,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 04:35:25,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 04:35:25,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-09-25 04:35:25,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 04:35:25,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2
[2020-09-25 04:35:25,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL
[2020-09-25 04:35:25,664 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2
[2020-09-25 04:35:25,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-25 04:35:25,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 04:35:25,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-25 04:35:25,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 04:35:25,669 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-25 04:35:25,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [94103202]
[2020-09-25 04:35:25,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-25 04:35:25,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8
[2020-09-25 04:35:25,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472538372]
[2020-09-25 04:35:25,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states
[2020-09-25 04:35:25,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-25 04:35:25,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2020-09-25 04:35:25,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56
[2020-09-25 04:35:25,672 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 8 states.
[2020-09-25 04:35:25,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-25 04:35:25,727 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions.
[2020-09-25 04:35:25,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states.
[2020-09-25 04:35:25,728 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26
[2020-09-25 04:35:25,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-25 04:35:25,729 INFO L225 Difference]: With dead ends: 41
[2020-09-25 04:35:25,729 INFO L226 Difference]: Without dead ends: 36
[2020-09-25 04:35:25,730 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72
[2020-09-25 04:35:25,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states.
[2020-09-25 04:35:25,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32.
[2020-09-25 04:35:25,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states.
[2020-09-25 04:35:25,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions.
[2020-09-25 04:35:25,737 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 26
[2020-09-25 04:35:25,737 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-25 04:35:25,737 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions.
[2020-09-25 04:35:25,738 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states.
[2020-09-25 04:35:25,738 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions.
[2020-09-25 04:35:25,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32
[2020-09-25 04:35:25,739 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-25 04:35:25,739 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-25 04:35:25,739 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2020-09-25 04:35:25,740 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-25 04:35:25,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-25 04:35:25,740 INFO L82 PathProgramCache]: Analyzing trace with hash -774708161, now seen corresponding path program 4 times
[2020-09-25 04:35:25,740 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-25 04:35:25,741 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [842349125]
[2020-09-25 04:35:25,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-25 04:35:25,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 04:35:25,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 04:35:25,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 04:35:26,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 04:35:26,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40
[2020-09-25 04:35:26,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-09-25 04:35:26,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 837
[2020-09-25 04:35:26,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL
[2020-09-25 04:35:26,590 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2
[2020-09-25 04:35:26,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8
[2020-09-25 04:35:26,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12
[2020-09-25 04:35:26,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27
[2020-09-25 04:35:26,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 04:35:26,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-25 04:35:26,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 04:35:26,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 04:35:26,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 04:35:26,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-09-25 04:35:26,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 04:35:26,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2
[2020-09-25 04:35:26,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL
[2020-09-25 04:35:26,712 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2
[2020-09-25 04:35:26,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-25 04:35:26,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 04:35:26,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-25 04:35:26,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 04:35:26,717 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-25 04:35:26,717 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [842349125]
[2020-09-25 04:35:26,718 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-25 04:35:26,718 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9
[2020-09-25 04:35:26,718 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115656576]
[2020-09-25 04:35:26,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states
[2020-09-25 04:35:26,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-25 04:35:26,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2020-09-25 04:35:26,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72
[2020-09-25 04:35:26,720 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 9 states.
[2020-09-25 04:35:26,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-25 04:35:26,790 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions.
[2020-09-25 04:35:26,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states.
[2020-09-25 04:35:26,790 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31
[2020-09-25 04:35:26,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-25 04:35:26,792 INFO L225 Difference]: With dead ends: 46
[2020-09-25 04:35:26,792 INFO L226 Difference]: Without dead ends: 41
[2020-09-25 04:35:26,792 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90
[2020-09-25 04:35:26,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states.
[2020-09-25 04:35:26,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37.
[2020-09-25 04:35:26,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states.
[2020-09-25 04:35:26,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions.
[2020-09-25 04:35:26,800 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 31
[2020-09-25 04:35:26,800 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-25 04:35:26,800 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions.
[2020-09-25 04:35:26,800 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states.
[2020-09-25 04:35:26,800 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions.
[2020-09-25 04:35:26,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37
[2020-09-25 04:35:26,801 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-25 04:35:26,802 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-25 04:35:26,802 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5
[2020-09-25 04:35:26,802 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-25 04:35:26,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-25 04:35:26,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1644982033, now seen corresponding path program 5 times
[2020-09-25 04:35:26,803 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-25 04:35:26,803 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1533043784]
[2020-09-25 04:35:26,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-25 04:35:26,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 04:35:26,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 04:35:26,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 04:35:27,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 04:35:27,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45
[2020-09-25 04:35:27,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-09-25 04:35:27,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1171
[2020-09-25 04:35:27,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL
[2020-09-25 04:35:27,989 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2
[2020-09-25 04:35:27,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9
[2020-09-25 04:35:27,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12
[2020-09-25 04:35:27,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32
[2020-09-25 04:35:27,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 04:35:28,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-25 04:35:28,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 04:35:28,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 04:35:28,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 04:35:28,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-09-25 04:35:28,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 04:35:28,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2
[2020-09-25 04:35:28,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL
[2020-09-25 04:35:28,145 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2
[2020-09-25 04:35:28,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-25 04:35:28,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 04:35:28,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-25 04:35:28,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 04:35:28,151 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-25 04:35:28,151 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1533043784]
[2020-09-25 04:35:28,151 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-25 04:35:28,152 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10
[2020-09-25 04:35:28,152 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663577439]
[2020-09-25 04:35:28,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states
[2020-09-25 04:35:28,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-25 04:35:28,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2020-09-25 04:35:28,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90
[2020-09-25 04:35:28,154 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 10 states.
[2020-09-25 04:35:28,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-25 04:35:28,225 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions.
[2020-09-25 04:35:28,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states.
[2020-09-25 04:35:28,226 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 36
[2020-09-25 04:35:28,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-25 04:35:28,227 INFO L225 Difference]: With dead ends: 51
[2020-09-25 04:35:28,228 INFO L226 Difference]: Without dead ends: 46
[2020-09-25 04:35:28,228 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2020-09-25 04:35:28,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states.
[2020-09-25 04:35:28,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42.
[2020-09-25 04:35:28,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states.
[2020-09-25 04:35:28,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions.
[2020-09-25 04:35:28,236 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 36
[2020-09-25 04:35:28,236 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-25 04:35:28,236 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions.
[2020-09-25 04:35:28,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states.
[2020-09-25 04:35:28,236 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions.
[2020-09-25 04:35:28,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42
[2020-09-25 04:35:28,237 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-25 04:35:28,238 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-25 04:35:28,238 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6
[2020-09-25 04:35:28,238 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-25 04:35:28,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-25 04:35:28,239 INFO L82 PathProgramCache]: Analyzing trace with hash 330519103, now seen corresponding path program 6 times
[2020-09-25 04:35:28,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-25 04:35:28,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2095908533]
[2020-09-25 04:35:28,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-25 04:35:28,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat
[2020-09-25 04:35:28,253 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace
[2020-09-25 04:35:28,253 INFO L520 BasicCegarLoop]: Counterexample might be feasible
[2020-09-25 04:35:28,259 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7
[2020-09-25 04:35:28,278 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 04:35:28 BoogieIcfgContainer
[2020-09-25 04:35:28,278 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-09-25 04:35:28,281 INFO L168 Benchmark]: Toolchain (without parser) took 8889.98 ms. Allocated memory was 138.4 MB in the beginning and 279.4 MB in the end (delta: 141.0 MB). Free memory was 101.8 MB in the beginning and 179.1 MB in the end (delta: -77.3 MB). Peak memory consumption was 63.7 MB. Max. memory is 7.1 GB.
[2020-09-25 04:35:28,283 INFO L168 Benchmark]: CDTParser took 0.74 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB.
[2020-09-25 04:35:28,283 INFO L168 Benchmark]: CACSL2BoogieTranslator took 314.31 ms. Allocated memory is still 138.4 MB. Free memory was 101.2 MB in the beginning and 91.8 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB.
[2020-09-25 04:35:28,284 INFO L168 Benchmark]: Boogie Preprocessor took 118.85 ms. Allocated memory was 138.4 MB in the beginning and 201.3 MB in the end (delta: 62.9 MB). Free memory was 91.8 MB in the beginning and 180.4 MB in the end (delta: -88.6 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB.
[2020-09-25 04:35:28,285 INFO L168 Benchmark]: RCFGBuilder took 278.81 ms. Allocated memory is still 201.3 MB. Free memory was 180.4 MB in the beginning and 169.0 MB in the end (delta: 11.4 MB). Peak memory consumption was 11.4 MB. Max. memory is 7.1 GB.
[2020-09-25 04:35:28,286 INFO L168 Benchmark]: TraceAbstraction took 8165.53 ms. Allocated memory was 201.3 MB in the beginning and 279.4 MB in the end (delta: 78.1 MB). Free memory was 168.3 MB in the beginning and 179.1 MB in the end (delta: -10.8 MB). Peak memory consumption was 67.3 MB. Max. memory is 7.1 GB.
[2020-09-25 04:35:28,289 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] #######################
--- Results ---
* Results from de.uni_freiburg.informatik.ultimate.core:
- StatisticsResult: Toolchain Benchmarks
Benchmark results are:
* CDTParser took 0.74 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB.
* CACSL2BoogieTranslator took 314.31 ms. Allocated memory is still 138.4 MB. Free memory was 101.2 MB in the beginning and 91.8 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB.
* Boogie Preprocessor took 118.85 ms. Allocated memory was 138.4 MB in the beginning and 201.3 MB in the end (delta: 62.9 MB). Free memory was 91.8 MB in the beginning and 180.4 MB in the end (delta: -88.6 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB.
* RCFGBuilder took 278.81 ms. Allocated memory is still 201.3 MB. Free memory was 180.4 MB in the beginning and 169.0 MB in the end (delta: 11.4 MB). Peak memory consumption was 11.4 MB. Max. memory is 7.1 GB.
* TraceAbstraction took 8165.53 ms. Allocated memory was 201.3 MB in the beginning and 279.4 MB in the end (delta: 78.1 MB). Free memory was 168.3 MB in the beginning and 179.1 MB in the end (delta: -10.8 MB). Peak memory consumption was 67.3 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:
[L11] unsigned int x = 0;
[L12] unsigned int y = 1;
[L14] COND TRUE x < 6
[L15] x++
[L16] y *= 2
[L14] COND TRUE x < 6
[L15] x++
[L16] y *= 2
[L14] COND TRUE x < 6
[L15] x++
[L16] y *= 2
[L14] COND TRUE x < 6
[L15] x++
[L16] y *= 2
[L14] COND TRUE x < 6
[L15] x++
[L16] y *= 2
[L14] COND TRUE x < 6
[L15] x++
[L16] y *= 2
[L14] COND FALSE !(x < 6)
[L19] CALL __VERIFIER_assert(y != 64)
[L4] COND TRUE !(cond)
[L5] __VERIFIER_error()
- StatisticsResult: Ultimate Automizer benchmark data
CFG has 4 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 8.0s, OverallIterations: 8, TraceHistogramMax: 6, AutomataDifference: 2.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 145 SDtfs, 83 SDslu, 524 SDs, 0 SdLazy, 153 SolverSat, 16 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 2.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 64 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=7, 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, 7 MinimizatonAttempts, 20 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 4.9s InterpolantComputationTime, 193 NumberOfCodeBlocks, 193 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 145 ConstructedInterpolants, 0 QuantifiedInterpolants, 19315 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 2 PerfectInterpolantSequences, 0/115 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...