/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=WIDEST --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-lit/bhmr2007.i
--------------------------------------------------------------------------------
This is Ultimate 0.1.25-c90d42b
[2020-09-25 03:28:01,836 INFO L177 SettingsManager]: Resetting all preferences to default values...
[2020-09-25 03:28:01,843 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values
[2020-09-25 03:28:01,885 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-09-25 03:28:01,886 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-09-25 03:28:01,895 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-09-25 03:28:01,898 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-09-25 03:28:01,902 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values
[2020-09-25 03:28:01,904 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-09-25 03:28:01,908 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-09-25 03:28:01,909 INFO L181 SettingsManager]: Resetting Sifa preferences to default values
[2020-09-25 03:28:01,910 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-09-25 03:28:01,910 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-09-25 03:28:01,914 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-09-25 03:28:01,916 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-09-25 03:28:01,918 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-09-25 03:28:01,920 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-09-25 03:28:01,921 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-09-25 03:28:01,922 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-09-25 03:28:01,930 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values
[2020-09-25 03:28:01,932 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-09-25 03:28:01,934 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-09-25 03:28:01,935 INFO L181 SettingsManager]: Resetting Referee preferences to default values
[2020-09-25 03:28:01,936 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-09-25 03:28:01,947 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-09-25 03:28:01,949 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-09-25 03:28:01,949 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-09-25 03:28:01,955 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-09-25 03:28:01,956 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-09-25 03:28:01,960 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-09-25 03:28:01,960 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-09-25 03:28:01,961 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-09-25 03:28:01,962 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-09-25 03:28:01,964 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values
[2020-09-25 03:28:01,965 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-09-25 03:28:01,966 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values
[2020-09-25 03:28:01,966 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-09-25 03:28:01,967 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-09-25 03:28:01,967 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values
[2020-09-25 03:28:01,968 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values
[2020-09-25 03:28:01,969 INFO L188 SettingsManager]: Finished resetting all preferences to default values...
[2020-09-25 03:28:01,970 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 03:28:02,013 INFO L113 SettingsManager]: Loading preferences was successful
[2020-09-25 03:28:02,013 INFO L115 SettingsManager]: Preferences different from defaults after loading the file:
[2020-09-25 03:28:02,015 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-09-25 03:28:02,016 INFO L138 SettingsManager]: * Create parallel compositions if possible=false
[2020-09-25 03:28:02,016 INFO L138 SettingsManager]: * Use SBE=true
[2020-09-25 03:28:02,016 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-09-25 03:28:02,017 INFO L138 SettingsManager]: * sizeof long=4
[2020-09-25 03:28:02,017 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true
[2020-09-25 03:28:02,017 INFO L138 SettingsManager]: * sizeof POINTER=4
[2020-09-25 03:28:02,018 INFO L138 SettingsManager]: * Check division by zero=IGNORE
[2020-09-25 03:28:02,019 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE
[2020-09-25 03:28:02,019 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-09-25 03:28:02,019 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE
[2020-09-25 03:28:02,020 INFO L138 SettingsManager]: * sizeof long double=12
[2020-09-25 03:28:02,020 INFO L138 SettingsManager]: * Check if freed pointer was valid=false
[2020-09-25 03:28:02,020 INFO L138 SettingsManager]: * Use constant arrays=true
[2020-09-25 03:28:02,020 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE
[2020-09-25 03:28:02,020 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-09-25 03:28:02,021 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements
[2020-09-25 03:28:02,021 INFO L138 SettingsManager]: * To the following directory=./dump/
[2020-09-25 03:28:02,021 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode
[2020-09-25 03:28:02,021 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-09-25 03:28:02,022 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-09-25 03:28:02,023 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP
[2020-09-25 03:28:02,023 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-09-25 03:28:02,023 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL
[2020-09-25 03:28:02,023 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-09-25 03:28:02,023 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-09-25 03:28:02,024 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE
[2020-09-25 03:28:02,024 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=WIDEST;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=WIDEST;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=WIDEST;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=WIDEST;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=WIDEST;log-additional-information=true;
[2020-09-25 03:28:02,443 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp
[2020-09-25 03:28:02,460 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-09-25 03:28:02,464 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-09-25 03:28:02,466 INFO L271 PluginConnector]: Initializing CDTParser...
[2020-09-25 03:28:02,467 INFO L275 PluginConnector]: CDTParser initialized
[2020-09-25 03:28:02,468 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/bhmr2007.i
[2020-09-25 03:28:02,539 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b56c011f4/12c8003fa41940af8a2f9c8b36e172a1/FLAGc8da12431
[2020-09-25 03:28:03,059 INFO L306 CDTParser]: Found 1 translation units.
[2020-09-25 03:28:03,060 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-lit/bhmr2007.i
[2020-09-25 03:28:03,068 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b56c011f4/12c8003fa41940af8a2f9c8b36e172a1/FLAGc8da12431
[2020-09-25 03:28:03,403 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b56c011f4/12c8003fa41940af8a2f9c8b36e172a1
[2020-09-25 03:28:03,414 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-09-25 03:28:03,419 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements.
[2020-09-25 03:28:03,420 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-09-25 03:28:03,421 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-09-25 03:28:03,425 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized
[2020-09-25 03:28:03,426 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 03:28:03" (1/1) ...
[2020-09-25 03:28:03,430 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e28bb4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:28:03, skipping insertion in model container
[2020-09-25 03:28:03,431 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 03:28:03" (1/1) ...
[2020-09-25 03:28:03,439 INFO L145 MainTranslator]: Starting translation in SV-COMP mode
[2020-09-25 03:28:03,468 INFO L178 MainTranslator]: Built tables and reachable declarations
[2020-09-25 03:28:03,674 INFO L206 PostProcessor]: Analyzing one entry point: main
[2020-09-25 03:28:03,680 INFO L203 MainTranslator]: Completed pre-run
[2020-09-25 03:28:03,698 INFO L206 PostProcessor]: Analyzing one entry point: main
[2020-09-25 03:28:03,713 INFO L208 MainTranslator]: Completed translation
[2020-09-25 03:28:03,714 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:28:03 WrapperNode
[2020-09-25 03:28:03,714 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-09-25 03:28:03,715 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-09-25 03:28:03,715 INFO L271 PluginConnector]: Initializing Boogie Preprocessor...
[2020-09-25 03:28:03,715 INFO L275 PluginConnector]: Boogie Preprocessor initialized
[2020-09-25 03:28:03,728 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:28:03" (1/1) ...
[2020-09-25 03:28:03,728 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:28:03" (1/1) ...
[2020-09-25 03:28:03,734 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:28:03" (1/1) ...
[2020-09-25 03:28:03,734 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:28:03" (1/1) ...
[2020-09-25 03:28:03,738 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:28:03" (1/1) ...
[2020-09-25 03:28:03,743 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:28:03" (1/1) ...
[2020-09-25 03:28:03,744 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:28:03" (1/1) ...
[2020-09-25 03:28:03,834 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-09-25 03:28:03,834 INFO L113 PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-09-25 03:28:03,835 INFO L271 PluginConnector]: Initializing RCFGBuilder...
[2020-09-25 03:28:03,835 INFO L275 PluginConnector]: RCFGBuilder initialized
[2020-09-25 03:28:03,836 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:28:03" (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 03:28:03,908 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-09-25 03:28:03,908 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-09-25 03:28:03,908 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2020-09-25 03:28:03,909 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2020-09-25 03:28:03,909 INFO L138 BoogieDeclarations]: Found implementation of procedure main
[2020-09-25 03:28:03,909 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-09-25 03:28:03,909 INFO L130 BoogieDeclarations]: Found specification of procedure abort
[2020-09-25 03:28:03,909 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2020-09-25 03:28:03,910 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2020-09-25 03:28:03,910 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-09-25 03:28:03,910 INFO L130 BoogieDeclarations]: Found specification of procedure main
[2020-09-25 03:28:03,910 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-09-25 03:28:03,910 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-09-25 03:28:04,168 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-09-25 03:28:04,169 INFO L295 CfgBuilder]: Removed 1 assume(true) statements.
[2020-09-25 03:28:04,175 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 03:28:04 BoogieIcfgContainer
[2020-09-25 03:28:04,175 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-09-25 03:28:04,186 INFO L113 PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-09-25 03:28:04,186 INFO L271 PluginConnector]: Initializing TraceAbstraction...
[2020-09-25 03:28:04,190 INFO L275 PluginConnector]: TraceAbstraction initialized
[2020-09-25 03:28:04,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 03:28:03" (1/3) ...
[2020-09-25 03:28:04,192 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c161a47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 03:28:04, skipping insertion in model container
[2020-09-25 03:28:04,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:28:03" (2/3) ...
[2020-09-25 03:28:04,193 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c161a47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 03:28:04, skipping insertion in model container
[2020-09-25 03:28:04,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 03:28:04" (3/3) ...
[2020-09-25 03:28:04,196 INFO L109 eAbstractionObserver]: Analyzing ICFG bhmr2007.i
[2020-09-25 03:28:04,207 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-09-25 03:28:04,218 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-09-25 03:28:04,246 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-09-25 03:28:04,276 INFO L375 AbstractCegarLoop]: Interprodecural is true
[2020-09-25 03:28:04,276 INFO L376 AbstractCegarLoop]: Hoare is true
[2020-09-25 03:28:04,276 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-09-25 03:28:04,276 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-09-25 03:28:04,277 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-09-25 03:28:04,277 INFO L380 AbstractCegarLoop]: Difference is false
[2020-09-25 03:28:04,277 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-09-25 03:28:04,277 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-09-25 03:28:04,299 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states.
[2020-09-25 03:28:04,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21
[2020-09-25 03:28:04,307 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-25 03:28:04,308 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-25 03:28:04,308 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-25 03:28:04,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-25 03:28:04,314 INFO L82 PathProgramCache]: Analyzing trace with hash 317967837, now seen corresponding path program 1 times
[2020-09-25 03:28:04,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-25 03:28:04,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1658658015]
[2020-09-25 03:28:04,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-25 03:28:04,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 03:28:04,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:04,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 03:28:04,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29
[2020-09-25 03:28:04,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 03:28:04,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 172
[2020-09-25 03:28:04,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST
[2020-09-25 03:28:04,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8
[2020-09-25 03:28:04,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15
[2020-09-25 03:28:04,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13
[2020-09-25 03:28:04,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3
[2020-09-25 03:28:04,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-25 03:28:04,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 03:28:04,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:04,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 03:28:04,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-09-25 03:28:04,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 03:28:04,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3
[2020-09-25 03:28:04,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST
[2020-09-25 03:28:04,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-25 03:28:04,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 03:28:04,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-25 03:28:04,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 03:28:04,977 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 03:28:04,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1658658015]
[2020-09-25 03:28:04,980 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-25 03:28:04,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9
[2020-09-25 03:28:04,982 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240611880]
[2020-09-25 03:28:04,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states
[2020-09-25 03:28:04,989 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-25 03:28:05,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2020-09-25 03:28:05,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72
[2020-09-25 03:28:05,011 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 9 states.
[2020-09-25 03:28:05,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-25 03:28:05,208 INFO L93 Difference]: Finished difference Result 70 states and 80 transitions.
[2020-09-25 03:28:05,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states.
[2020-09-25 03:28:05,211 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20
[2020-09-25 03:28:05,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-25 03:28:05,222 INFO L225 Difference]: With dead ends: 70
[2020-09-25 03:28:05,223 INFO L226 Difference]: Without dead ends: 40
[2020-09-25 03:28:05,229 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132
[2020-09-25 03:28:05,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states.
[2020-09-25 03:28:05,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 31.
[2020-09-25 03:28:05,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states.
[2020-09-25 03:28:05,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions.
[2020-09-25 03:28:05,283 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 20
[2020-09-25 03:28:05,284 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-25 03:28:05,284 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions.
[2020-09-25 03:28:05,284 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states.
[2020-09-25 03:28:05,284 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions.
[2020-09-25 03:28:05,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28
[2020-09-25 03:28:05,286 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-25 03:28:05,286 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-25 03:28:05,287 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-09-25 03:28:05,287 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-25 03:28:05,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-25 03:28:05,288 INFO L82 PathProgramCache]: Analyzing trace with hash -628039010, now seen corresponding path program 1 times
[2020-09-25 03:28:05,288 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-25 03:28:05,289 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1394693369]
[2020-09-25 03:28:05,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-25 03:28:05,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 03:28:05,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:05,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 03:28:05,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36
[2020-09-25 03:28:05,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 03:28:05,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 304
[2020-09-25 03:28:05,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST
[2020-09-25 03:28:05,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11
[2020-09-25 03:28:05,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15
[2020-09-25 03:28:05,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20
[2020-09-25 03:28:05,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 14
[2020-09-25 03:28:05,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-25 03:28:05,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 03:28:05,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:05,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 03:28:05,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-09-25 03:28:05,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 03:28:05,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3
[2020-09-25 03:28:05,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST
[2020-09-25 03:28:05,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-25 03:28:05,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 03:28:05,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-25 03:28:05,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4
[2020-09-25 03:28:05,919 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 03:28:05,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1394693369]
[2020-09-25 03:28:05,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-25 03:28:05,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12
[2020-09-25 03:28:05,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141857245]
[2020-09-25 03:28:05,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states
[2020-09-25 03:28:05,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-25 03:28:05,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants.
[2020-09-25 03:28:05,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132
[2020-09-25 03:28:05,926 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 12 states.
[2020-09-25 03:28:06,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-25 03:28:06,307 INFO L93 Difference]: Finished difference Result 53 states and 56 transitions.
[2020-09-25 03:28:06,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states.
[2020-09-25 03:28:06,308 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27
[2020-09-25 03:28:06,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-25 03:28:06,310 INFO L225 Difference]: With dead ends: 53
[2020-09-25 03:28:06,310 INFO L226 Difference]: Without dead ends: 48
[2020-09-25 03:28:06,312 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380
[2020-09-25 03:28:06,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states.
[2020-09-25 03:28:06,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 38.
[2020-09-25 03:28:06,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states.
[2020-09-25 03:28:06,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions.
[2020-09-25 03:28:06,319 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 27
[2020-09-25 03:28:06,319 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-25 03:28:06,320 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions.
[2020-09-25 03:28:06,320 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states.
[2020-09-25 03:28:06,320 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions.
[2020-09-25 03:28:06,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28
[2020-09-25 03:28:06,321 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-25 03:28:06,321 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-25 03:28:06,321 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-09-25 03:28:06,322 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-25 03:28:06,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-25 03:28:06,322 INFO L82 PathProgramCache]: Analyzing trace with hash -1791276066, now seen corresponding path program 1 times
[2020-09-25 03:28:06,322 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-25 03:28:06,323 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [767344907]
[2020-09-25 03:28:06,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-25 03:28:06,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 03:28:06,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:06,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 03:28:06,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36
[2020-09-25 03:28:06,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 03:28:06,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 137
[2020-09-25 03:28:06,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST
[2020-09-25 03:28:06,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11
[2020-09-25 03:28:06,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15
[2020-09-25 03:28:06,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20
[2020-09-25 03:28:06,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-25 03:28:06,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-25 03:28:06,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 03:28:06,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:06,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 03:28:06,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-09-25 03:28:06,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 03:28:06,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4
[2020-09-25 03:28:06,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST
[2020-09-25 03:28:06,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-25 03:28:06,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 03:28:06,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-25 03:28:06,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 03:28:06,747 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 03:28:06,748 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [767344907]
[2020-09-25 03:28:06,748 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-25 03:28:06,748 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12
[2020-09-25 03:28:06,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659606199]
[2020-09-25 03:28:06,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states
[2020-09-25 03:28:06,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-25 03:28:06,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants.
[2020-09-25 03:28:06,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132
[2020-09-25 03:28:06,752 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 12 states.
[2020-09-25 03:28:07,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-25 03:28:07,099 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions.
[2020-09-25 03:28:07,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states.
[2020-09-25 03:28:07,106 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27
[2020-09-25 03:28:07,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-25 03:28:07,107 INFO L225 Difference]: With dead ends: 54
[2020-09-25 03:28:07,108 INFO L226 Difference]: Without dead ends: 49
[2020-09-25 03:28:07,109 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380
[2020-09-25 03:28:07,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states.
[2020-09-25 03:28:07,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 41.
[2020-09-25 03:28:07,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states.
[2020-09-25 03:28:07,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions.
[2020-09-25 03:28:07,121 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 27
[2020-09-25 03:28:07,121 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-25 03:28:07,121 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions.
[2020-09-25 03:28:07,121 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states.
[2020-09-25 03:28:07,122 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions.
[2020-09-25 03:28:07,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35
[2020-09-25 03:28:07,125 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-25 03:28:07,126 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-25 03:28:07,126 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-09-25 03:28:07,127 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-25 03:28:07,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-25 03:28:07,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1600642371, now seen corresponding path program 2 times
[2020-09-25 03:28:07,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-25 03:28:07,128 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1308740530]
[2020-09-25 03:28:07,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-25 03:28:07,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 03:28:07,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:07,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 03:28:07,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43
[2020-09-25 03:28:07,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 03:28:07,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 279
[2020-09-25 03:28:07,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST
[2020-09-25 03:28:07,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14
[2020-09-25 03:28:07,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15
[2020-09-25 03:28:07,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27
[2020-09-25 03:28:07,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 03:28:07,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-25 03:28:07,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 03:28:07,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:07,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 03:28:07,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-09-25 03:28:07,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 03:28:07,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2
[2020-09-25 03:28:07,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST
[2020-09-25 03:28:07,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-25 03:28:07,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 03:28:07,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-25 03:28:07,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 03:28:07,708 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2020-09-25 03:28:07,710 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1308740530]
[2020-09-25 03:28:07,710 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-25 03:28:07,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14
[2020-09-25 03:28:07,711 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142431288]
[2020-09-25 03:28:07,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states
[2020-09-25 03:28:07,718 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-25 03:28:07,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants.
[2020-09-25 03:28:07,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182
[2020-09-25 03:28:07,719 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 14 states.
[2020-09-25 03:28:08,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-25 03:28:08,210 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions.
[2020-09-25 03:28:08,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states.
[2020-09-25 03:28:08,211 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34
[2020-09-25 03:28:08,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-25 03:28:08,213 INFO L225 Difference]: With dead ends: 58
[2020-09-25 03:28:08,213 INFO L226 Difference]: Without dead ends: 53
[2020-09-25 03:28:08,214 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702
[2020-09-25 03:28:08,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states.
[2020-09-25 03:28:08,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 45.
[2020-09-25 03:28:08,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states.
[2020-09-25 03:28:08,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions.
[2020-09-25 03:28:08,230 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 34
[2020-09-25 03:28:08,231 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-25 03:28:08,231 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions.
[2020-09-25 03:28:08,231 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states.
[2020-09-25 03:28:08,231 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions.
[2020-09-25 03:28:08,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35
[2020-09-25 03:28:08,236 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-25 03:28:08,237 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-25 03:28:08,237 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2020-09-25 03:28:08,237 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-25 03:28:08,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-25 03:28:08,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1531087869, now seen corresponding path program 1 times
[2020-09-25 03:28:08,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-25 03:28:08,238 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1276543049]
[2020-09-25 03:28:08,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-25 03:28:08,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 03:28:08,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:08,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 03:28:08,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43
[2020-09-25 03:28:08,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 03:28:08,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 245
[2020-09-25 03:28:08,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST
[2020-09-25 03:28:08,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14
[2020-09-25 03:28:08,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15
[2020-09-25 03:28:08,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27
[2020-09-25 03:28:08,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-25 03:28:08,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-25 03:28:08,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 03:28:08,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:08,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 03:28:08,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-09-25 03:28:08,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 03:28:08,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1
[2020-09-25 03:28:08,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST
[2020-09-25 03:28:08,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-25 03:28:08,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 03:28:08,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-25 03:28:08,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-25 03:28:08,751 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2020-09-25 03:28:08,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1276543049]
[2020-09-25 03:28:08,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-25 03:28:08,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14
[2020-09-25 03:28:08,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233508450]
[2020-09-25 03:28:08,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states
[2020-09-25 03:28:08,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-25 03:28:08,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants.
[2020-09-25 03:28:08,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182
[2020-09-25 03:28:08,755 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand 14 states.
[2020-09-25 03:28:09,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-25 03:28:09,298 INFO L93 Difference]: Finished difference Result 65 states and 69 transitions.
[2020-09-25 03:28:09,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states.
[2020-09-25 03:28:09,299 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34
[2020-09-25 03:28:09,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-25 03:28:09,300 INFO L225 Difference]: With dead ends: 65
[2020-09-25 03:28:09,300 INFO L226 Difference]: Without dead ends: 60
[2020-09-25 03:28:09,301 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702
[2020-09-25 03:28:09,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states.
[2020-09-25 03:28:09,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 42.
[2020-09-25 03:28:09,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states.
[2020-09-25 03:28:09,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions.
[2020-09-25 03:28:09,308 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 34
[2020-09-25 03:28:09,308 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-25 03:28:09,308 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions.
[2020-09-25 03:28:09,308 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states.
[2020-09-25 03:28:09,309 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions.
[2020-09-25 03:28:09,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35
[2020-09-25 03:28:09,310 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-25 03:28:09,310 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-25 03:28:09,310 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2020-09-25 03:28:09,310 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-25 03:28:09,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-25 03:28:09,311 INFO L82 PathProgramCache]: Analyzing trace with hash -966733443, now seen corresponding path program 2 times
[2020-09-25 03:28:09,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-25 03:28:09,311 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [351056839]
[2020-09-25 03:28:09,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-25 03:28:09,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 03:28:09,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:09,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 03:28:09,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43
[2020-09-25 03:28:09,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 03:28:09,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 189
[2020-09-25 03:28:09,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST
[2020-09-25 03:28:09,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14
[2020-09-25 03:28:09,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15
[2020-09-25 03:28:09,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27
[2020-09-25 03:28:09,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-25 03:28:09,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-25 03:28:09,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 03:28:09,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:09,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 03:28:09,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-09-25 03:28:09,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 03:28:09,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1
[2020-09-25 03:28:09,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST
[2020-09-25 03:28:09,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-25 03:28:09,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 03:28:09,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-25 03:28:09,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-25 03:28:09,776 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2020-09-25 03:28:09,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [351056839]
[2020-09-25 03:28:09,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-25 03:28:09,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14
[2020-09-25 03:28:09,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681100950]
[2020-09-25 03:28:09,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states
[2020-09-25 03:28:09,778 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-25 03:28:09,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants.
[2020-09-25 03:28:09,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182
[2020-09-25 03:28:09,778 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 14 states.
[2020-09-25 03:28:10,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-25 03:28:10,386 INFO L93 Difference]: Finished difference Result 85 states and 92 transitions.
[2020-09-25 03:28:10,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states.
[2020-09-25 03:28:10,388 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34
[2020-09-25 03:28:10,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-25 03:28:10,389 INFO L225 Difference]: With dead ends: 85
[2020-09-25 03:28:10,390 INFO L226 Difference]: Without dead ends: 79
[2020-09-25 03:28:10,390 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756
[2020-09-25 03:28:10,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states.
[2020-09-25 03:28:10,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 55.
[2020-09-25 03:28:10,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states.
[2020-09-25 03:28:10,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions.
[2020-09-25 03:28:10,397 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 34
[2020-09-25 03:28:10,398 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-25 03:28:10,398 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions.
[2020-09-25 03:28:10,398 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states.
[2020-09-25 03:28:10,398 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions.
[2020-09-25 03:28:10,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42
[2020-09-25 03:28:10,399 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-25 03:28:10,399 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-25 03:28:10,400 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5
[2020-09-25 03:28:10,400 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-25 03:28:10,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-25 03:28:10,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1509294206, now seen corresponding path program 3 times
[2020-09-25 03:28:10,400 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-25 03:28:10,401 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1637236734]
[2020-09-25 03:28:10,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-25 03:28:10,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 03:28:10,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:10,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 03:28:10,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50
[2020-09-25 03:28:10,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 03:28:10,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 274
[2020-09-25 03:28:10,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST
[2020-09-25 03:28:10,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17
[2020-09-25 03:28:10,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15
[2020-09-25 03:28:10,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34
[2020-09-25 03:28:10,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 03:28:10,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-25 03:28:10,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 03:28:10,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:10,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 03:28:10,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-09-25 03:28:10,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 03:28:10,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2
[2020-09-25 03:28:10,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST
[2020-09-25 03:28:10,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-25 03:28:10,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 03:28:10,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-25 03:28:10,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-25 03:28:11,006 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2020-09-25 03:28:11,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1637236734]
[2020-09-25 03:28:11,007 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-25 03:28:11,007 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15
[2020-09-25 03:28:11,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042556357]
[2020-09-25 03:28:11,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states
[2020-09-25 03:28:11,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-25 03:28:11,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants.
[2020-09-25 03:28:11,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210
[2020-09-25 03:28:11,010 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand 15 states.
[2020-09-25 03:28:11,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-25 03:28:11,587 INFO L93 Difference]: Finished difference Result 63 states and 67 transitions.
[2020-09-25 03:28:11,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states.
[2020-09-25 03:28:11,588 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 41
[2020-09-25 03:28:11,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-25 03:28:11,588 INFO L225 Difference]: With dead ends: 63
[2020-09-25 03:28:11,589 INFO L226 Difference]: Without dead ends: 0
[2020-09-25 03:28:11,590 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=118, Invalid=694, Unknown=0, NotChecked=0, Total=812
[2020-09-25 03:28:11,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states.
[2020-09-25 03:28:11,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0.
[2020-09-25 03:28:11,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states.
[2020-09-25 03:28:11,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions.
[2020-09-25 03:28:11,591 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 41
[2020-09-25 03:28:11,591 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-25 03:28:11,591 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions.
[2020-09-25 03:28:11,591 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states.
[2020-09-25 03:28:11,591 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions.
[2020-09-25 03:28:11,592 INFO L282 IsEmpty]: Finished isEmpty. No accepting run.
[2020-09-25 03:28:11,592 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6
[2020-09-25 03:28:11,594 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.
[2020-09-25 03:28:11,693 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true
[2020-09-25 03:28:11,693 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed.
[2020-09-25 03:28:11,693 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed.
[2020-09-25 03:28:11,693 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true
[2020-09-25 03:28:11,693 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true
[2020-09-25 03:28:11,694 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed.
[2020-09-25 03:28:11,694 INFO L268 CegarLoopResult]: For program point L4-3(lines 3 5) no Hoare annotation was computed.
[2020-09-25 03:28:11,694 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed.
[2020-09-25 03:28:11,694 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed.
[2020-09-25 03:28:11,694 INFO L268 CegarLoopResult]: For program point L4-1(line 4) no Hoare annotation was computed.
[2020-09-25 03:28:11,694 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed.
[2020-09-25 03:28:11,695 INFO L268 CegarLoopResult]: For program point L27(line 27) no Hoare annotation was computed.
[2020-09-25 03:28:11,695 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 29) no Hoare annotation was computed.
[2020-09-25 03:28:11,695 INFO L268 CegarLoopResult]: For program point L23(line 23) no Hoare annotation was computed.
[2020-09-25 03:28:11,695 INFO L268 CegarLoopResult]: For program point L19(line 19) no Hoare annotation was computed.
[2020-09-25 03:28:11,695 INFO L268 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed.
[2020-09-25 03:28:11,695 INFO L264 CegarLoopResult]: At program point L17-2(lines 17 26) the Hoare annotation is: (let ((.cse0 (+ main_~a~0 main_~b~0)) (.cse1 (* 3 main_~i~0))) (and (<= .cse0 (* 3 main_~n~0)) (<= .cse1 .cse0) (<= .cse0 .cse1)))
[2020-09-25 03:28:11,696 INFO L268 CegarLoopResult]: For program point L15-1(line 15) no Hoare annotation was computed.
[2020-09-25 03:28:11,696 INFO L264 CegarLoopResult]: At program point L17-3(lines 17 26) the Hoare annotation is: (= (+ main_~a~0 main_~b~0) (* main_~n~0 3))
[2020-09-25 03:28:11,696 INFO L268 CegarLoopResult]: For program point L15-2(line 15) no Hoare annotation was computed.
[2020-09-25 03:28:11,696 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 29) no Hoare annotation was computed.
[2020-09-25 03:28:11,696 INFO L268 CegarLoopResult]: For program point L15-3(line 15) no Hoare annotation was computed.
[2020-09-25 03:28:11,696 INFO L268 CegarLoopResult]: For program point L15-4(line 15) no Hoare annotation was computed.
[2020-09-25 03:28:11,696 INFO L268 CegarLoopResult]: For program point L15-5(line 15) no Hoare annotation was computed.
[2020-09-25 03:28:11,697 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 29) the Hoare annotation is: true
[2020-09-25 03:28:11,697 INFO L268 CegarLoopResult]: For program point L22(line 22) no Hoare annotation was computed.
[2020-09-25 03:28:11,697 INFO L268 CegarLoopResult]: For program point L20(line 20) no Hoare annotation was computed.
[2020-09-25 03:28:11,697 INFO L268 CegarLoopResult]: For program point L18(line 18) no Hoare annotation was computed.
[2020-09-25 03:28:11,697 INFO L268 CegarLoopResult]: For program point L18-1(lines 18 24) no Hoare annotation was computed.
[2020-09-25 03:28:11,697 INFO L268 CegarLoopResult]: For program point L16(line 16) no Hoare annotation was computed.
[2020-09-25 03:28:11,697 INFO L268 CegarLoopResult]: For program point L18-2(line 18) no Hoare annotation was computed.
[2020-09-25 03:28:11,697 INFO L268 CegarLoopResult]: For program point L16-1(line 16) no Hoare annotation was computed.
[2020-09-25 03:28:11,698 INFO L268 CegarLoopResult]: For program point L14(line 14) no Hoare annotation was computed.
[2020-09-25 03:28:11,698 INFO L268 CegarLoopResult]: For program point L18-4(line 18) no Hoare annotation was computed.
[2020-09-25 03:28:11,698 INFO L268 CegarLoopResult]: For program point L14-1(line 14) no Hoare annotation was computed.
[2020-09-25 03:28:11,698 INFO L268 CegarLoopResult]: For program point L18-5(lines 18 24) no Hoare annotation was computed.
[2020-09-25 03:28:11,698 INFO L268 CegarLoopResult]: For program point L14-2(line 14) no Hoare annotation was computed.
[2020-09-25 03:28:11,698 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true
[2020-09-25 03:28:11,698 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed.
[2020-09-25 03:28:11,699 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed.
[2020-09-25 03:28:11,699 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed.
[2020-09-25 03:28:11,699 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed.
[2020-09-25 03:28:11,699 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed.
[2020-09-25 03:28:11,723 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 03:28:11 BoogieIcfgContainer
[2020-09-25 03:28:11,723 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-09-25 03:28:11,727 INFO L168 Benchmark]: Toolchain (without parser) took 8309.29 ms. Allocated memory was 147.8 MB in the beginning and 289.4 MB in the end (delta: 141.6 MB). Free memory was 103.5 MB in the beginning and 239.5 MB in the end (delta: -136.0 MB). Peak memory consumption was 5.6 MB. Max. memory is 7.1 GB.
[2020-09-25 03:28:11,728 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 147.8 MB. Free memory was 121.2 MB in the beginning and 121.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB.
[2020-09-25 03:28:11,729 INFO L168 Benchmark]: CACSL2BoogieTranslator took 293.80 ms. Allocated memory is still 147.8 MB. Free memory was 102.9 MB in the beginning and 93.5 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB.
[2020-09-25 03:28:11,730 INFO L168 Benchmark]: Boogie Preprocessor took 119.42 ms. Allocated memory was 147.8 MB in the beginning and 205.0 MB in the end (delta: 57.1 MB). Free memory was 93.3 MB in the beginning and 184.1 MB in the end (delta: -90.8 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB.
[2020-09-25 03:28:11,731 INFO L168 Benchmark]: RCFGBuilder took 340.81 ms. Allocated memory is still 205.0 MB. Free memory was 184.1 MB in the beginning and 170.6 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB.
[2020-09-25 03:28:11,732 INFO L168 Benchmark]: TraceAbstraction took 7537.38 ms. Allocated memory was 205.0 MB in the beginning and 289.4 MB in the end (delta: 84.4 MB). Free memory was 169.9 MB in the beginning and 239.5 MB in the end (delta: -69.6 MB). Peak memory consumption was 14.8 MB. Max. memory is 7.1 GB.
[2020-09-25 03:28:11,737 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] #######################
--- Results ---
* Results from de.uni_freiburg.informatik.ultimate.core:
- StatisticsResult: Toolchain Benchmarks
Benchmark results are:
* CDTParser took 0.19 ms. Allocated memory is still 147.8 MB. Free memory was 121.2 MB in the beginning and 121.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB.
* CACSL2BoogieTranslator took 293.80 ms. Allocated memory is still 147.8 MB. Free memory was 102.9 MB in the beginning and 93.5 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB.
* Boogie Preprocessor took 119.42 ms. Allocated memory was 147.8 MB in the beginning and 205.0 MB in the end (delta: 57.1 MB). Free memory was 93.3 MB in the beginning and 184.1 MB in the end (delta: -90.8 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB.
* RCFGBuilder took 340.81 ms. Allocated memory is still 205.0 MB. Free memory was 184.1 MB in the beginning and 170.6 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB.
* TraceAbstraction took 7537.38 ms. Allocated memory was 205.0 MB in the beginning and 289.4 MB in the end (delta: 84.4 MB). Free memory was 169.9 MB in the beginning and 239.5 MB in the end (delta: -69.6 MB). Peak memory consumption was 14.8 MB. Max. memory is 7.1 GB.
* Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
- PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable
For all program executions holds that call of __VERIFIER_error() unreachable at this location
- AllSpecificationsHoldResult: All specifications hold
1 specifications checked. All of them hold
- InvariantResult [Line: 17]: Loop Invariant
Derived loop invariant: (a + b <= 3 * n && 3 * i <= a + b) && a + b <= 3 * i
- StatisticsResult: Ultimate Automizer benchmark data
CFG has 5 procedures, 43 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 7.3s, OverallIterations: 7, TraceHistogramMax: 3, AutomataDifference: 3.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 172 SDtfs, 317 SDslu, 1118 SDs, 0 SdLazy, 938 SolverSat, 80 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 183 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 3.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=55occurred in iteration=6, 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, 77 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 15 PreInvPairs, 23 NumberOfFragments, 34 HoareAnnotationTreeSize, 15 FomulaSimplifications, 789 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 44 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 3.6s InterpolantComputationTime, 217 NumberOfCodeBlocks, 217 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 210 ConstructedInterpolants, 0 QuantifiedInterpolants, 70697 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 9/41 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 correct!
Received shutdown request...