/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options interpolation-heuristic=FIRST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id2_b3_o2.c
--------------------------------------------------------------------------------
This is Ultimate 0.1.25-c90d42b
[2020-09-24 15:58:39,409 INFO L177 SettingsManager]: Resetting all preferences to default values...
[2020-09-24 15:58:39,413 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values
[2020-09-24 15:58:39,438 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-09-24 15:58:39,439 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-09-24 15:58:39,440 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-09-24 15:58:39,442 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-09-24 15:58:39,444 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values
[2020-09-24 15:58:39,446 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-09-24 15:58:39,447 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-09-24 15:58:39,448 INFO L181 SettingsManager]: Resetting Sifa preferences to default values
[2020-09-24 15:58:39,449 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-09-24 15:58:39,449 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-09-24 15:58:39,451 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-09-24 15:58:39,452 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-09-24 15:58:39,453 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-09-24 15:58:39,454 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-09-24 15:58:39,455 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-09-24 15:58:39,457 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-09-24 15:58:39,459 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values
[2020-09-24 15:58:39,461 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-09-24 15:58:39,462 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-09-24 15:58:39,464 INFO L181 SettingsManager]: Resetting Referee preferences to default values
[2020-09-24 15:58:39,465 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-09-24 15:58:39,470 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-09-24 15:58:39,470 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-09-24 15:58:39,470 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-09-24 15:58:39,471 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-09-24 15:58:39,475 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-09-24 15:58:39,476 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-09-24 15:58:39,476 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-09-24 15:58:39,478 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-09-24 15:58:39,479 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-09-24 15:58:39,480 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values
[2020-09-24 15:58:39,481 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-09-24 15:58:39,481 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values
[2020-09-24 15:58:39,483 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-09-24 15:58:39,483 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-09-24 15:58:39,484 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values
[2020-09-24 15:58:39,490 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values
[2020-09-24 15:58:39,491 INFO L188 SettingsManager]: Finished resetting all preferences to default values...
[2020-09-24 15:58:39,492 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf
[2020-09-24 15:58:39,543 INFO L113 SettingsManager]: Loading preferences was successful
[2020-09-24 15:58:39,544 INFO L115 SettingsManager]: Preferences different from defaults after loading the file:
[2020-09-24 15:58:39,546 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-09-24 15:58:39,546 INFO L138 SettingsManager]: * Create parallel compositions if possible=false
[2020-09-24 15:58:39,547 INFO L138 SettingsManager]: * Use SBE=true
[2020-09-24 15:58:39,547 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-09-24 15:58:39,547 INFO L138 SettingsManager]: * sizeof long=4
[2020-09-24 15:58:39,548 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true
[2020-09-24 15:58:39,548 INFO L138 SettingsManager]: * sizeof POINTER=4
[2020-09-24 15:58:39,548 INFO L138 SettingsManager]: * Check division by zero=IGNORE
[2020-09-24 15:58:39,549 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE
[2020-09-24 15:58:39,549 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-09-24 15:58:39,550 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE
[2020-09-24 15:58:39,550 INFO L138 SettingsManager]: * sizeof long double=12
[2020-09-24 15:58:39,550 INFO L138 SettingsManager]: * Check if freed pointer was valid=false
[2020-09-24 15:58:39,550 INFO L138 SettingsManager]: * Use constant arrays=true
[2020-09-24 15:58:39,551 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE
[2020-09-24 15:58:39,551 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-09-24 15:58:39,551 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements
[2020-09-24 15:58:39,551 INFO L138 SettingsManager]: * To the following directory=./dump/
[2020-09-24 15:58:39,552 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode
[2020-09-24 15:58:39,552 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-09-24 15:58:39,552 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-09-24 15:58:39,552 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP
[2020-09-24 15:58:39,553 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-09-24 15:58:39,553 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL
[2020-09-24 15:58:39,553 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-09-24 15:58:39,554 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-09-24 15:58:39,554 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE
[2020-09-24 15:58:39,554 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true;
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true;
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true;
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true;
[2020-09-24 15:58:40,042 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp
[2020-09-24 15:58:40,067 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-09-24 15:58:40,071 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-09-24 15:58:40,073 INFO L271 PluginConnector]: Initializing CDTParser...
[2020-09-24 15:58:40,074 INFO L275 PluginConnector]: CDTParser initialized
[2020-09-24 15:58:40,075 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id2_b3_o2.c
[2020-09-24 15:58:40,172 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2d60f5d4c/bf6e00582f5b432b9a87793e1854b55f/FLAG29821f93d
[2020-09-24 15:58:40,790 INFO L306 CDTParser]: Found 1 translation units.
[2020-09-24 15:58:40,790 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id2_b3_o2.c
[2020-09-24 15:58:40,799 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2d60f5d4c/bf6e00582f5b432b9a87793e1854b55f/FLAG29821f93d
[2020-09-24 15:58:41,153 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2d60f5d4c/bf6e00582f5b432b9a87793e1854b55f
[2020-09-24 15:58:41,169 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-09-24 15:58:41,176 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements.
[2020-09-24 15:58:41,178 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-09-24 15:58:41,179 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-09-24 15:58:41,183 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized
[2020-09-24 15:58:41,185 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 03:58:41" (1/1) ...
[2020-09-24 15:58:41,190 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2db4b1fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:58:41, skipping insertion in model container
[2020-09-24 15:58:41,191 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 03:58:41" (1/1) ...
[2020-09-24 15:58:41,202 INFO L145 MainTranslator]: Starting translation in SV-COMP mode
[2020-09-24 15:58:41,229 INFO L178 MainTranslator]: Built tables and reachable declarations
[2020-09-24 15:58:41,466 INFO L206 PostProcessor]: Analyzing one entry point: main
[2020-09-24 15:58:41,478 INFO L203 MainTranslator]: Completed pre-run
[2020-09-24 15:58:41,496 INFO L206 PostProcessor]: Analyzing one entry point: main
[2020-09-24 15:58:41,512 INFO L208 MainTranslator]: Completed translation
[2020-09-24 15:58:41,512 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:58:41 WrapperNode
[2020-09-24 15:58:41,513 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-09-24 15:58:41,514 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-09-24 15:58:41,514 INFO L271 PluginConnector]: Initializing Boogie Preprocessor...
[2020-09-24 15:58:41,514 INFO L275 PluginConnector]: Boogie Preprocessor initialized
[2020-09-24 15:58:41,528 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:58:41" (1/1) ...
[2020-09-24 15:58:41,529 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:58:41" (1/1) ...
[2020-09-24 15:58:41,535 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:58:41" (1/1) ...
[2020-09-24 15:58:41,536 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:58:41" (1/1) ...
[2020-09-24 15:58:41,623 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:58:41" (1/1) ...
[2020-09-24 15:58:41,627 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:58:41" (1/1) ...
[2020-09-24 15:58:41,628 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:58:41" (1/1) ...
[2020-09-24 15:58:41,630 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-09-24 15:58:41,631 INFO L113 PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-09-24 15:58:41,631 INFO L271 PluginConnector]: Initializing RCFGBuilder...
[2020-09-24 15:58:41,631 INFO L275 PluginConnector]: RCFGBuilder initialized
[2020-09-24 15:58:41,632 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:58:41" (1/1) ...
No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-09-24 15:58:41,719 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-09-24 15:58:41,720 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-09-24 15:58:41,720 INFO L138 BoogieDeclarations]: Found implementation of procedure id
[2020-09-24 15:58:41,720 INFO L138 BoogieDeclarations]: Found implementation of procedure id2
[2020-09-24 15:58:41,720 INFO L138 BoogieDeclarations]: Found implementation of procedure main
[2020-09-24 15:58:41,721 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint
[2020-09-24 15:58:41,721 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-09-24 15:58:41,721 INFO L130 BoogieDeclarations]: Found specification of procedure id
[2020-09-24 15:58:41,721 INFO L130 BoogieDeclarations]: Found specification of procedure id2
[2020-09-24 15:58:41,722 INFO L130 BoogieDeclarations]: Found specification of procedure main
[2020-09-24 15:58:41,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-09-24 15:58:41,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-09-24 15:58:41,975 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-09-24 15:58:41,975 INFO L295 CfgBuilder]: Removed 0 assume(true) statements.
[2020-09-24 15:58:41,984 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 03:58:41 BoogieIcfgContainer
[2020-09-24 15:58:41,984 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-09-24 15:58:41,986 INFO L113 PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-09-24 15:58:41,986 INFO L271 PluginConnector]: Initializing TraceAbstraction...
[2020-09-24 15:58:41,990 INFO L275 PluginConnector]: TraceAbstraction initialized
[2020-09-24 15:58:41,991 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 03:58:41" (1/3) ...
[2020-09-24 15:58:41,992 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b00cd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 03:58:41, skipping insertion in model container
[2020-09-24 15:58:41,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:58:41" (2/3) ...
[2020-09-24 15:58:41,993 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b00cd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 03:58:41, skipping insertion in model container
[2020-09-24 15:58:41,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 03:58:41" (3/3) ...
[2020-09-24 15:58:41,996 INFO L109 eAbstractionObserver]: Analyzing ICFG id2_b3_o2.c
[2020-09-24 15:58:42,013 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-09-24 15:58:42,035 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-09-24 15:58:42,073 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-09-24 15:58:42,125 INFO L375 AbstractCegarLoop]: Interprodecural is true
[2020-09-24 15:58:42,125 INFO L376 AbstractCegarLoop]: Hoare is true
[2020-09-24 15:58:42,125 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-09-24 15:58:42,125 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-09-24 15:58:42,126 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-09-24 15:58:42,126 INFO L380 AbstractCegarLoop]: Difference is false
[2020-09-24 15:58:42,126 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-09-24 15:58:42,126 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-09-24 15:58:42,148 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states.
[2020-09-24 15:58:42,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17
[2020-09-24 15:58:42,155 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-24 15:58:42,156 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 15:58:42,157 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 15:58:42,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 15:58:42,165 INFO L82 PathProgramCache]: Analyzing trace with hash 875745540, now seen corresponding path program 1 times
[2020-09-24 15:58:42,175 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 15:58:42,175 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [215808926]
[2020-09-24 15:58:42,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 15:58:42,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:58:42,342 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0
[2020-09-24 15:58:42,342 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0
[2020-09-24 15:58:42,343 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0
[2020-09-24 15:58:42,343 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 15:58:42,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25
[2020-09-24 15:58:42,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 15:58:42,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39
[2020-09-24 15:58:42,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST
[2020-09-24 15:58:42,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-09-24 15:58:42,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18
[2020-09-24 15:58:42,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6
[2020-09-24 15:58:42,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 15:58:42,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 15:58:42,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:58:42,429 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0
[2020-09-24 15:58:42,430 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0
[2020-09-24 15:58:42,430 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0
[2020-09-24 15:58:42,430 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 15:58:42,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-09-24 15:58:42,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 15:58:42,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2
[2020-09-24 15:58:42,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST
[2020-09-24 15:58:42,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 15:58:42,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 15:58:42,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 15:58:42,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 15:58:42,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2020-09-24 15:58:42,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:58:42,451 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0
[2020-09-24 15:58:42,451 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0
[2020-09-24 15:58:42,451 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0
[2020-09-24 15:58:42,452 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 15:58:42,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-24 15:58:42,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 15:58:42,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5
[2020-09-24 15:58:42,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST
[2020-09-24 15:58:42,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3
[2020-09-24 15:58:42,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 15:58:42,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6
[2020-09-24 15:58:42,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 15:58:42,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-24 15:58:42,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [215808926]
[2020-09-24 15:58:42,480 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-24 15:58:42,481 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-09-24 15:58:42,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988678152]
[2020-09-24 15:58:42,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-09-24 15:58:42,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 15:58:42,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-09-24 15:58:42,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-09-24 15:58:42,516 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 5 states.
[2020-09-24 15:58:42,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 15:58:42,603 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions.
[2020-09-24 15:58:42,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states.
[2020-09-24 15:58:42,606 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16
[2020-09-24 15:58:42,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 15:58:42,620 INFO L225 Difference]: With dead ends: 51
[2020-09-24 15:58:42,620 INFO L226 Difference]: Without dead ends: 36
[2020-09-24 15:58:42,625 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2020-09-24 15:58:42,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states.
[2020-09-24 15:58:42,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36.
[2020-09-24 15:58:42,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states.
[2020-09-24 15:58:42,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions.
[2020-09-24 15:58:42,689 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 16
[2020-09-24 15:58:42,690 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-24 15:58:42,690 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions.
[2020-09-24 15:58:42,690 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-09-24 15:58:42,690 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions.
[2020-09-24 15:58:42,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26
[2020-09-24 15:58:42,693 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-24 15:58:42,694 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]
[2020-09-24 15:58:42,694 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-09-24 15:58:42,694 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 15:58:42,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 15:58:42,695 INFO L82 PathProgramCache]: Analyzing trace with hash 71846672, now seen corresponding path program 1 times
[2020-09-24 15:58:42,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 15:58:42,696 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [908072602]
[2020-09-24 15:58:42,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 15:58:42,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:58:42,760 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0
[2020-09-24 15:58:42,761 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0
[2020-09-24 15:58:42,761 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0
[2020-09-24 15:58:42,762 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 15:58:42,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36
[2020-09-24 15:58:42,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 15:58:42,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40
[2020-09-24 15:58:42,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST
[2020-09-24 15:58:42,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7
[2020-09-24 15:58:42,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23
[2020-09-24 15:58:42,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12
[2020-09-24 15:58:42,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 15:58:42,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 15:58:42,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:58:42,855 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0
[2020-09-24 15:58:42,855 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0
[2020-09-24 15:58:42,856 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0
[2020-09-24 15:58:42,856 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 15:58:42,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-09-24 15:58:42,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 15:58:42,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2
[2020-09-24 15:58:42,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST
[2020-09-24 15:58:42,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 15:58:42,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 15:58:42,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 15:58:42,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 15:58:42,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2020-09-24 15:58:42,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:58:42,891 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0
[2020-09-24 15:58:42,892 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0
[2020-09-24 15:58:42,892 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0
[2020-09-24 15:58:42,892 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 15:58:42,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22
[2020-09-24 15:58:42,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 15:58:42,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17
[2020-09-24 15:58:42,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST
[2020-09-24 15:58:42,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6
[2020-09-24 15:58:42,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 15:58:42,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17
[2020-09-24 15:58:42,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 15:58:43,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2020-09-24 15:58:43,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:58:43,013 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0
[2020-09-24 15:58:43,014 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0
[2020-09-24 15:58:43,014 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0
[2020-09-24 15:58:43,014 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 15:58:43,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-24 15:58:43,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 15:58:43,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5
[2020-09-24 15:58:43,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST
[2020-09-24 15:58:43,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3
[2020-09-24 15:58:43,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 15:58:43,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6
[2020-09-24 15:58:43,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 15:58:43,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-24 15:58:43,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [908072602]
[2020-09-24 15:58:43,048 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-24 15:58:43,049 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2020-09-24 15:58:43,049 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561522965]
[2020-09-24 15:58:43,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states
[2020-09-24 15:58:43,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 15:58:43,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2020-09-24 15:58:43,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56
[2020-09-24 15:58:43,052 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 8 states.
[2020-09-24 15:58:43,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 15:58:43,182 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions.
[2020-09-24 15:58:43,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states.
[2020-09-24 15:58:43,183 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25
[2020-09-24 15:58:43,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 15:58:43,185 INFO L225 Difference]: With dead ends: 66
[2020-09-24 15:58:43,185 INFO L226 Difference]: Without dead ends: 44
[2020-09-24 15:58:43,187 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110
[2020-09-24 15:58:43,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states.
[2020-09-24 15:58:43,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42.
[2020-09-24 15:58:43,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states.
[2020-09-24 15:58:43,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions.
[2020-09-24 15:58:43,198 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 25
[2020-09-24 15:58:43,198 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-24 15:58:43,198 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions.
[2020-09-24 15:58:43,198 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states.
[2020-09-24 15:58:43,199 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions.
[2020-09-24 15:58:43,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35
[2020-09-24 15:58:43,200 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-24 15:58:43,200 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1]
[2020-09-24 15:58:43,201 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-09-24 15:58:43,201 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 15:58:43,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 15:58:43,202 INFO L82 PathProgramCache]: Analyzing trace with hash -511991682, now seen corresponding path program 1 times
[2020-09-24 15:58:43,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 15:58:43,202 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [429518868]
[2020-09-24 15:58:43,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 15:58:43,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:58:43,249 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0
[2020-09-24 15:58:43,249 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0
[2020-09-24 15:58:43,249 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0
[2020-09-24 15:58:43,252 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 15:58:43,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47
[2020-09-24 15:58:43,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 15:58:43,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25
[2020-09-24 15:58:43,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST
[2020-09-24 15:58:43,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-09-24 15:58:43,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34
[2020-09-24 15:58:43,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6
[2020-09-24 15:58:43,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 15:58:43,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 15:58:43,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:58:43,299 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0
[2020-09-24 15:58:43,299 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0
[2020-09-24 15:58:43,300 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0
[2020-09-24 15:58:43,300 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 15:58:43,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-09-24 15:58:43,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 15:58:43,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4
[2020-09-24 15:58:43,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST
[2020-09-24 15:58:43,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 15:58:43,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 15:58:43,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 15:58:43,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2
[2020-09-24 15:58:43,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2020-09-24 15:58:43,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:58:43,381 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0
[2020-09-24 15:58:43,381 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0
[2020-09-24 15:58:43,381 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0
[2020-09-24 15:58:43,382 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 15:58:43,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33
[2020-09-24 15:58:43,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 15:58:43,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8
[2020-09-24 15:58:43,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST
[2020-09-24 15:58:43,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-09-24 15:58:43,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21
[2020-09-24 15:58:43,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6
[2020-09-24 15:58:43,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 15:58:43,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2020-09-24 15:58:43,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:58:43,477 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0
[2020-09-24 15:58:43,478 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0
[2020-09-24 15:58:43,478 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0
[2020-09-24 15:58:43,478 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 15:58:43,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22
[2020-09-24 15:58:43,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 15:58:43,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6
[2020-09-24 15:58:43,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST
[2020-09-24 15:58:43,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3
[2020-09-24 15:58:43,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 15:58:43,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17
[2020-09-24 15:58:43,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3
[2020-09-24 15:58:43,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2020-09-24 15:58:43,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:58:43,515 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0
[2020-09-24 15:58:43,516 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0
[2020-09-24 15:58:43,516 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0
[2020-09-24 15:58:43,516 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 15:58:43,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-24 15:58:43,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 15:58:43,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3
[2020-09-24 15:58:43,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST
[2020-09-24 15:58:43,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 15:58:43,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 15:58:43,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 15:58:43,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 15:58:43,528 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2020-09-24 15:58:43,529 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [429518868]
[2020-09-24 15:58:43,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-24 15:58:43,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-09-24 15:58:43,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167655845]
[2020-09-24 15:58:43,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-09-24 15:58:43,531 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 15:58:43,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-09-24 15:58:43,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-09-24 15:58:43,533 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 5 states.
[2020-09-24 15:58:43,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 15:58:43,594 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions.
[2020-09-24 15:58:43,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states.
[2020-09-24 15:58:43,596 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34
[2020-09-24 15:58:43,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 15:58:43,598 INFO L225 Difference]: With dead ends: 69
[2020-09-24 15:58:43,598 INFO L226 Difference]: Without dead ends: 50
[2020-09-24 15:58:43,601 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2020-09-24 15:58:43,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states.
[2020-09-24 15:58:43,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47.
[2020-09-24 15:58:43,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states.
[2020-09-24 15:58:43,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions.
[2020-09-24 15:58:43,621 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 34
[2020-09-24 15:58:43,621 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-24 15:58:43,621 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions.
[2020-09-24 15:58:43,621 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-09-24 15:58:43,622 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions.
[2020-09-24 15:58:43,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35
[2020-09-24 15:58:43,624 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-24 15:58:43,624 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1]
[2020-09-24 15:58:43,624 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-09-24 15:58:43,624 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 15:58:43,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 15:58:43,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1477652418, now seen corresponding path program 1 times
[2020-09-24 15:58:43,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 15:58:43,626 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [687172277]
[2020-09-24 15:58:43,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 15:58:43,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:58:43,670 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0
[2020-09-24 15:58:43,671 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0
[2020-09-24 15:58:43,671 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0
[2020-09-24 15:58:43,671 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 15:58:43,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47
[2020-09-24 15:58:43,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 15:58:43,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11
[2020-09-24 15:58:43,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST
[2020-09-24 15:58:43,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-09-24 15:58:43,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40
[2020-09-24 15:58:43,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6
[2020-09-24 15:58:43,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 15:58:43,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 15:58:43,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:58:43,710 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0
[2020-09-24 15:58:43,711 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0
[2020-09-24 15:58:43,711 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0
[2020-09-24 15:58:43,711 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 15:58:43,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-09-24 15:58:43,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 15:58:43,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1
[2020-09-24 15:58:43,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST
[2020-09-24 15:58:43,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 15:58:43,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 15:58:43,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 15:58:43,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 15:58:43,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2020-09-24 15:58:43,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:58:43,746 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0
[2020-09-24 15:58:43,746 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0
[2020-09-24 15:58:43,746 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0
[2020-09-24 15:58:43,747 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 15:58:43,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33
[2020-09-24 15:58:43,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 15:58:43,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7
[2020-09-24 15:58:43,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST
[2020-09-24 15:58:43,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3
[2020-09-24 15:58:43,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 15:58:43,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28
[2020-09-24 15:58:43,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 15:58:43,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2020-09-24 15:58:43,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:58:43,773 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0
[2020-09-24 15:58:43,773 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0
[2020-09-24 15:58:43,774 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0
[2020-09-24 15:58:43,774 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 15:58:43,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22
[2020-09-24 15:58:43,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 15:58:43,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1
[2020-09-24 15:58:43,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST
[2020-09-24 15:58:43,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 15:58:43,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 15:58:43,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 15:58:43,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 15:58:43,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2020-09-24 15:58:43,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:58:43,787 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0
[2020-09-24 15:58:43,787 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0
[2020-09-24 15:58:43,787 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0
[2020-09-24 15:58:43,788 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 15:58:43,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-24 15:58:43,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 15:58:43,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2
[2020-09-24 15:58:43,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST
[2020-09-24 15:58:43,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 15:58:43,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 15:58:43,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 15:58:43,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 15:58:43,799 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2020-09-24 15:58:43,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [687172277]
[2020-09-24 15:58:43,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-24 15:58:43,801 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-09-24 15:58:43,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449216339]
[2020-09-24 15:58:43,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-09-24 15:58:43,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 15:58:43,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-09-24 15:58:43,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-09-24 15:58:43,806 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 5 states.
[2020-09-24 15:58:43,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 15:58:43,839 INFO L93 Difference]: Finished difference Result 54 states and 58 transitions.
[2020-09-24 15:58:43,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states.
[2020-09-24 15:58:43,840 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34
[2020-09-24 15:58:43,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 15:58:43,843 INFO L225 Difference]: With dead ends: 54
[2020-09-24 15:58:43,843 INFO L226 Difference]: Without dead ends: 49
[2020-09-24 15:58:43,844 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2020-09-24 15:58:43,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states.
[2020-09-24 15:58:43,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47.
[2020-09-24 15:58:43,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states.
[2020-09-24 15:58:43,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions.
[2020-09-24 15:58:43,857 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 34
[2020-09-24 15:58:43,858 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-24 15:58:43,861 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions.
[2020-09-24 15:58:43,861 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-09-24 15:58:43,862 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions.
[2020-09-24 15:58:43,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35
[2020-09-24 15:58:43,863 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-24 15:58:43,863 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1]
[2020-09-24 15:58:43,863 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2020-09-24 15:58:43,864 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 15:58:43,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 15:58:43,864 INFO L82 PathProgramCache]: Analyzing trace with hash -2109914946, now seen corresponding path program 1 times
[2020-09-24 15:58:43,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 15:58:43,865 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2055541590]
[2020-09-24 15:58:43,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 15:58:43,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat
[2020-09-24 15:58:43,893 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace
[2020-09-24 15:58:43,894 INFO L520 BasicCegarLoop]: Counterexample might be feasible
[2020-09-24 15:58:43,900 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2020-09-24 15:58:43,926 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 03:58:43 BoogieIcfgContainer
[2020-09-24 15:58:43,927 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-09-24 15:58:43,930 INFO L168 Benchmark]: Toolchain (without parser) took 2758.15 ms. Allocated memory was 140.0 MB in the beginning and 237.0 MB in the end (delta: 97.0 MB). Free memory was 103.3 MB in the beginning and 158.6 MB in the end (delta: -55.3 MB). Peak memory consumption was 41.6 MB. Max. memory is 7.1 GB.
[2020-09-24 15:58:43,933 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.1 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB.
[2020-09-24 15:58:43,934 INFO L168 Benchmark]: CACSL2BoogieTranslator took 334.75 ms. Allocated memory is still 140.0 MB. Free memory was 102.4 MB in the beginning and 93.0 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB.
[2020-09-24 15:58:43,936 INFO L168 Benchmark]: Boogie Preprocessor took 116.93 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 93.0 MB in the beginning and 181.2 MB in the end (delta: -88.2 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB.
[2020-09-24 15:58:43,942 INFO L168 Benchmark]: RCFGBuilder took 353.94 ms. Allocated memory is still 202.4 MB. Free memory was 181.2 MB in the beginning and 167.5 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB.
[2020-09-24 15:58:43,943 INFO L168 Benchmark]: TraceAbstraction took 1940.74 ms. Allocated memory was 202.4 MB in the beginning and 237.0 MB in the end (delta: 34.6 MB). Free memory was 166.5 MB in the beginning and 158.6 MB in the end (delta: 7.9 MB). Peak memory consumption was 42.5 MB. Max. memory is 7.1 GB.
[2020-09-24 15:58:43,953 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] #######################
--- Results ---
* Results from de.uni_freiburg.informatik.ultimate.core:
- StatisticsResult: Toolchain Benchmarks
Benchmark results are:
* CDTParser took 0.25 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.1 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB.
* CACSL2BoogieTranslator took 334.75 ms. Allocated memory is still 140.0 MB. Free memory was 102.4 MB in the beginning and 93.0 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB.
* Boogie Preprocessor took 116.93 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 93.0 MB in the beginning and 181.2 MB in the end (delta: -88.2 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB.
* RCFGBuilder took 353.94 ms. Allocated memory is still 202.4 MB. Free memory was 181.2 MB in the beginning and 167.5 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB.
* TraceAbstraction took 1940.74 ms. Allocated memory was 202.4 MB in the beginning and 237.0 MB in the end (delta: 34.6 MB). Free memory was 166.5 MB in the beginning and 158.6 MB in the end (delta: 7.9 MB). Peak memory consumption was 42.5 MB. Max. memory is 7.1 GB.
* Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
- CounterExampleResult [Line: 25]: a call of __VERIFIER_error() is reachable
a call of __VERIFIER_error() is reachable
We found a FailurePath:
[L22] unsigned int input = __VERIFIER_nondet_uint();
[L23] CALL, EXPR id(input)
[L8] COND FALSE !(x==0)
[L9] CALL, EXPR id2(x-1)
[L15] COND FALSE !(x==0)
[L16] CALL, EXPR id(x-1)
[L8] COND TRUE x==0
[L8] return 0;
[L16] RET, EXPR id(x-1)
[L16] unsigned int ret = id(x-1) + 1;
[L17] COND FALSE !(ret > 3)
[L18] return ret;
[L9] RET, EXPR id2(x-1)
[L9] unsigned int ret = id2(x-1) + 1;
[L10] COND FALSE !(ret > 3)
[L11] return ret;
[L23] RET, EXPR id(input)
[L23] unsigned int result = id(input);
[L24] COND TRUE result == 2
[L25] __VERIFIER_error()
- StatisticsResult: Ultimate Automizer benchmark data
CFG has 5 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.7s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 157 SDtfs, 12 SDslu, 544 SDs, 0 SdLazy, 70 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 56 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=47occurred in iteration=3, 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, 4 MinimizatonAttempts, 7 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 143 NumberOfCodeBlocks, 143 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 105 ConstructedInterpolants, 0 QuantifiedInterpolants, 5901 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 8/8 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...