/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=SMALLEST --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/id_b3_o2-2.c
--------------------------------------------------------------------------------
This is Ultimate 0.1.25-c90d42b
[2020-09-24 18:14:34,225 INFO L177 SettingsManager]: Resetting all preferences to default values...
[2020-09-24 18:14:34,230 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values
[2020-09-24 18:14:34,274 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-09-24 18:14:34,275 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-09-24 18:14:34,282 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-09-24 18:14:34,284 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-09-24 18:14:34,288 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values
[2020-09-24 18:14:34,290 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-09-24 18:14:34,293 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-09-24 18:14:34,294 INFO L181 SettingsManager]: Resetting Sifa preferences to default values
[2020-09-24 18:14:34,295 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-09-24 18:14:34,296 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-09-24 18:14:34,298 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-09-24 18:14:34,301 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-09-24 18:14:34,302 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-09-24 18:14:34,304 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-09-24 18:14:34,305 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-09-24 18:14:34,307 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-09-24 18:14:34,315 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values
[2020-09-24 18:14:34,317 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-09-24 18:14:34,318 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-09-24 18:14:34,319 INFO L181 SettingsManager]: Resetting Referee preferences to default values
[2020-09-24 18:14:34,320 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-09-24 18:14:34,332 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-09-24 18:14:34,332 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-09-24 18:14:34,333 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-09-24 18:14:34,340 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-09-24 18:14:34,341 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-09-24 18:14:34,342 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-09-24 18:14:34,342 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-09-24 18:14:34,346 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-09-24 18:14:34,347 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-09-24 18:14:34,349 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values
[2020-09-24 18:14:34,350 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-09-24 18:14:34,350 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values
[2020-09-24 18:14:34,351 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-09-24 18:14:34,351 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-09-24 18:14:34,352 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values
[2020-09-24 18:14:34,353 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values
[2020-09-24 18:14:34,354 INFO L188 SettingsManager]: Finished resetting all preferences to default values...
[2020-09-24 18:14:34,355 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 18:14:34,399 INFO L113 SettingsManager]: Loading preferences was successful
[2020-09-24 18:14:34,400 INFO L115 SettingsManager]: Preferences different from defaults after loading the file:
[2020-09-24 18:14:34,401 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-09-24 18:14:34,401 INFO L138 SettingsManager]: * Create parallel compositions if possible=false
[2020-09-24 18:14:34,402 INFO L138 SettingsManager]: * Use SBE=true
[2020-09-24 18:14:34,402 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-09-24 18:14:34,402 INFO L138 SettingsManager]: * sizeof long=4
[2020-09-24 18:14:34,402 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true
[2020-09-24 18:14:34,403 INFO L138 SettingsManager]: * sizeof POINTER=4
[2020-09-24 18:14:34,403 INFO L138 SettingsManager]: * Check division by zero=IGNORE
[2020-09-24 18:14:34,404 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE
[2020-09-24 18:14:34,404 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-09-24 18:14:34,404 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE
[2020-09-24 18:14:34,405 INFO L138 SettingsManager]: * sizeof long double=12
[2020-09-24 18:14:34,405 INFO L138 SettingsManager]: * Check if freed pointer was valid=false
[2020-09-24 18:14:34,405 INFO L138 SettingsManager]: * Use constant arrays=true
[2020-09-24 18:14:34,405 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE
[2020-09-24 18:14:34,406 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-09-24 18:14:34,406 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements
[2020-09-24 18:14:34,406 INFO L138 SettingsManager]: * To the following directory=./dump/
[2020-09-24 18:14:34,406 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode
[2020-09-24 18:14:34,406 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-09-24 18:14:34,407 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-09-24 18:14:34,407 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP
[2020-09-24 18:14:34,407 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-09-24 18:14:34,407 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL
[2020-09-24 18:14:34,407 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-09-24 18:14:34,407 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-09-24 18:14:34,408 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE
[2020-09-24 18:14:34,408 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=SMALLEST;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=SMALLEST;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=SMALLEST;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=SMALLEST;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=SMALLEST;log-additional-information=true;
[2020-09-24 18:14:34,884 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp
[2020-09-24 18:14:34,902 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-09-24 18:14:34,907 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-09-24 18:14:34,909 INFO L271 PluginConnector]: Initializing CDTParser...
[2020-09-24 18:14:34,909 INFO L275 PluginConnector]: CDTParser initialized
[2020-09-24 18:14:34,910 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_b3_o2-2.c
[2020-09-24 18:14:34,989 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d035fb214/1e4310c10ee5480783b66344837795a8/FLAG70bfa96f8
[2020-09-24 18:14:35,476 INFO L306 CDTParser]: Found 1 translation units.
[2020-09-24 18:14:35,477 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id_b3_o2-2.c
[2020-09-24 18:14:35,485 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d035fb214/1e4310c10ee5480783b66344837795a8/FLAG70bfa96f8
[2020-09-24 18:14:35,812 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d035fb214/1e4310c10ee5480783b66344837795a8
[2020-09-24 18:14:35,824 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-09-24 18:14:35,830 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements.
[2020-09-24 18:14:35,831 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-09-24 18:14:35,832 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-09-24 18:14:35,836 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized
[2020-09-24 18:14:35,837 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 06:14:35" (1/1) ...
[2020-09-24 18:14:35,841 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@478ac3cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:14:35, skipping insertion in model container
[2020-09-24 18:14:35,841 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 06:14:35" (1/1) ...
[2020-09-24 18:14:35,850 INFO L145 MainTranslator]: Starting translation in SV-COMP mode
[2020-09-24 18:14:35,874 INFO L178 MainTranslator]: Built tables and reachable declarations
[2020-09-24 18:14:36,068 INFO L206 PostProcessor]: Analyzing one entry point: main
[2020-09-24 18:14:36,073 INFO L203 MainTranslator]: Completed pre-run
[2020-09-24 18:14:36,093 INFO L206 PostProcessor]: Analyzing one entry point: main
[2020-09-24 18:14:36,111 INFO L208 MainTranslator]: Completed translation
[2020-09-24 18:14:36,111 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:14:36 WrapperNode
[2020-09-24 18:14:36,111 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-09-24 18:14:36,112 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-09-24 18:14:36,112 INFO L271 PluginConnector]: Initializing Boogie Preprocessor...
[2020-09-24 18:14:36,112 INFO L275 PluginConnector]: Boogie Preprocessor initialized
[2020-09-24 18:14:36,130 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:14:36" (1/1) ...
[2020-09-24 18:14:36,130 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:14:36" (1/1) ...
[2020-09-24 18:14:36,136 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:14:36" (1/1) ...
[2020-09-24 18:14:36,137 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:14:36" (1/1) ...
[2020-09-24 18:14:36,140 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:14:36" (1/1) ...
[2020-09-24 18:14:36,142 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:14:36" (1/1) ...
[2020-09-24 18:14:36,143 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:14:36" (1/1) ...
[2020-09-24 18:14:36,144 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-09-24 18:14:36,145 INFO L113 PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-09-24 18:14:36,145 INFO L271 PluginConnector]: Initializing RCFGBuilder...
[2020-09-24 18:14:36,145 INFO L275 PluginConnector]: RCFGBuilder initialized
[2020-09-24 18:14:36,146 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:14:36" (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 18:14:36,299 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-09-24 18:14:36,299 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-09-24 18:14:36,299 INFO L138 BoogieDeclarations]: Found implementation of procedure id
[2020-09-24 18:14:36,299 INFO L138 BoogieDeclarations]: Found implementation of procedure main
[2020-09-24 18:14:36,300 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-09-24 18:14:36,300 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-09-24 18:14:36,300 INFO L130 BoogieDeclarations]: Found specification of procedure id
[2020-09-24 18:14:36,300 INFO L130 BoogieDeclarations]: Found specification of procedure main
[2020-09-24 18:14:36,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-09-24 18:14:36,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-09-24 18:14:36,505 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-09-24 18:14:36,505 INFO L295 CfgBuilder]: Removed 0 assume(true) statements.
[2020-09-24 18:14:36,510 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 06:14:36 BoogieIcfgContainer
[2020-09-24 18:14:36,510 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-09-24 18:14:36,511 INFO L113 PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-09-24 18:14:36,511 INFO L271 PluginConnector]: Initializing TraceAbstraction...
[2020-09-24 18:14:36,515 INFO L275 PluginConnector]: TraceAbstraction initialized
[2020-09-24 18:14:36,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 06:14:35" (1/3) ...
[2020-09-24 18:14:36,516 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43a51512 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 06:14:36, skipping insertion in model container
[2020-09-24 18:14:36,516 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:14:36" (2/3) ...
[2020-09-24 18:14:36,517 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43a51512 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 06:14:36, skipping insertion in model container
[2020-09-24 18:14:36,517 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 06:14:36" (3/3) ...
[2020-09-24 18:14:36,519 INFO L109 eAbstractionObserver]: Analyzing ICFG id_b3_o2-2.c
[2020-09-24 18:14:36,529 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-09-24 18:14:36,538 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-09-24 18:14:36,559 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-09-24 18:14:36,589 INFO L375 AbstractCegarLoop]: Interprodecural is true
[2020-09-24 18:14:36,589 INFO L376 AbstractCegarLoop]: Hoare is true
[2020-09-24 18:14:36,589 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-09-24 18:14:36,590 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-09-24 18:14:36,591 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-09-24 18:14:36,591 INFO L380 AbstractCegarLoop]: Difference is false
[2020-09-24 18:14:36,592 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-09-24 18:14:36,592 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-09-24 18:14:36,614 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states.
[2020-09-24 18:14:36,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19
[2020-09-24 18:14:36,621 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-24 18:14:36,622 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 18:14:36,622 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 18:14:36,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 18:14:36,629 INFO L82 PathProgramCache]: Analyzing trace with hash 856871792, now seen corresponding path program 1 times
[2020-09-24 18:14:36,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 18:14:36,638 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [276376240]
[2020-09-24 18:14:36,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 18:14:36,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 18:14:36,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 18:14:36,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 18:14:36,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27
[2020-09-24 18:14:36,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 18:14:36,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59
[2020-09-24 18:14:36,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST
[2020-09-24 18:14:36,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-09-24 18:14:36,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19
[2020-09-24 18:14:36,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7
[2020-09-24 18:14:36,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2
[2020-09-24 18:14:36,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 18:14:36,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 18:14:36,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 18:14:36,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 18:14:36,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-09-24 18:14:36,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 18:14:36,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3
[2020-09-24 18:14:36,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST
[2020-09-24 18:14:36,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 18:14:36,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 18:14:36,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 18:14:36,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 18:14:36,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7
[2020-09-24 18:14:36,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 18:14:37,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 18:14:37,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 18:14:37,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-24 18:14:37,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 18:14:37,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28
[2020-09-24 18:14:37,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST
[2020-09-24 18:14:37,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3
[2020-09-24 18:14:37,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 18:14:37,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6
[2020-09-24 18:14:37,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 18:14:37,060 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 18:14:37,062 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [276376240]
[2020-09-24 18:14:37,064 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-24 18:14:37,064 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-09-24 18:14:37,066 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099029794]
[2020-09-24 18:14:37,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-09-24 18:14:37,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 18:14:37,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-09-24 18:14:37,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-09-24 18:14:37,089 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 5 states.
[2020-09-24 18:14:37,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 18:14:37,179 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions.
[2020-09-24 18:14:37,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states.
[2020-09-24 18:14:37,181 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18
[2020-09-24 18:14:37,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 18:14:37,192 INFO L225 Difference]: With dead ends: 44
[2020-09-24 18:14:37,193 INFO L226 Difference]: Without dead ends: 28
[2020-09-24 18:14:37,196 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2020-09-24 18:14:37,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states.
[2020-09-24 18:14:37,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28.
[2020-09-24 18:14:37,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states.
[2020-09-24 18:14:37,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions.
[2020-09-24 18:14:37,245 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 18
[2020-09-24 18:14:37,246 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-24 18:14:37,246 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions.
[2020-09-24 18:14:37,246 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-09-24 18:14:37,247 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions.
[2020-09-24 18:14:37,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29
[2020-09-24 18:14:37,249 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-24 18:14:37,249 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]
[2020-09-24 18:14:37,250 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-09-24 18:14:37,250 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 18:14:37,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 18:14:37,251 INFO L82 PathProgramCache]: Analyzing trace with hash 1774609951, now seen corresponding path program 1 times
[2020-09-24 18:14:37,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 18:14:37,251 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1801700987]
[2020-09-24 18:14:37,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 18:14:37,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 18:14:37,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 18:14:37,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 18:14:37,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 18:14:37,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39
[2020-09-24 18:14:37,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-09-24 18:14:37,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 538
[2020-09-24 18:14:37,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST
[2020-09-24 18:14:37,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-09-24 18:14:37,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31
[2020-09-24 18:14:37,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7
[2020-09-24 18:14:37,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2
[2020-09-24 18:14:37,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 18:14:37,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 18:14:37,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 18:14:37,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 18:14:37,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-09-24 18:14:37,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 18:14:37,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2
[2020-09-24 18:14:37,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST
[2020-09-24 18:14:37,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 18:14:37,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 18:14:37,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 18:14:37,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 18:14:37,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7
[2020-09-24 18:14:37,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 18:14:37,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 18:14:37,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 18:14:38,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 18:14:38,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23
[2020-09-24 18:14:38,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-09-24 18:14:38,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 225
[2020-09-24 18:14:38,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST
[2020-09-24 18:14:38,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3
[2020-09-24 18:14:38,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 18:14:38,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18
[2020-09-24 18:14:38,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 18:14:38,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2020-09-24 18:14:38,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 18:14:38,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 18:14:38,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 18:14:38,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-24 18:14:38,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 18:14:38,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17
[2020-09-24 18:14:38,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST
[2020-09-24 18:14:38,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 18:14:38,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 18:14:38,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 18:14:38,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2
[2020-09-24 18:14:38,152 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 18:14:38,153 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1801700987]
[2020-09-24 18:14:38,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-24 18:14:38,154 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-09-24 18:14:38,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954470025]
[2020-09-24 18:14:38,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-09-24 18:14:38,162 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 18:14:38,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-09-24 18:14:38,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-09-24 18:14:38,163 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 5 states.
[2020-09-24 18:14:38,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 18:14:38,224 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions.
[2020-09-24 18:14:38,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states.
[2020-09-24 18:14:38,225 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28
[2020-09-24 18:14:38,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 18:14:38,227 INFO L225 Difference]: With dead ends: 36
[2020-09-24 18:14:38,227 INFO L226 Difference]: Without dead ends: 30
[2020-09-24 18:14:38,228 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 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 18:14:38,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states.
[2020-09-24 18:14:38,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28.
[2020-09-24 18:14:38,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states.
[2020-09-24 18:14:38,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions.
[2020-09-24 18:14:38,236 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 28
[2020-09-24 18:14:38,236 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-24 18:14:38,236 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions.
[2020-09-24 18:14:38,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-09-24 18:14:38,237 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions.
[2020-09-24 18:14:38,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29
[2020-09-24 18:14:38,238 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-24 18:14:38,238 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]
[2020-09-24 18:14:38,238 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-09-24 18:14:38,239 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 18:14:38,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 18:14:38,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1645321695, now seen corresponding path program 1 times
[2020-09-24 18:14:38,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 18:14:38,240 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2108677655]
[2020-09-24 18:14:38,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 18:14:38,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 18:14:38,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 18:14:38,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 18:14:38,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39
[2020-09-24 18:14:38,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 18:14:38,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 126
[2020-09-24 18:14:38,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST
[2020-09-24 18:14:38,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7
[2020-09-24 18:14:38,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24
[2020-09-24 18:14:38,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14
[2020-09-24 18:14:38,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 18:14:38,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 18:14:38,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 18:14:38,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 18:14:38,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 18:14:38,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-09-24 18:14:38,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 18:14:38,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2
[2020-09-24 18:14:38,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST
[2020-09-24 18:14:38,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 18:14:38,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 18:14:38,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 18:14:38,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 18:14:38,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7
[2020-09-24 18:14:38,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 18:14:38,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 18:14:38,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 18:14:38,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23
[2020-09-24 18:14:38,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 18:14:38,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 72
[2020-09-24 18:14:38,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST
[2020-09-24 18:14:38,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6
[2020-09-24 18:14:38,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 18:14:38,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18
[2020-09-24 18:14:38,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 18:14:38,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2020-09-24 18:14:38,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 18:14:38,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 18:14:38,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 18:14:38,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-24 18:14:38,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 18:14:38,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21
[2020-09-24 18:14:38,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST
[2020-09-24 18:14:38,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3
[2020-09-24 18:14:38,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 18:14:38,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6
[2020-09-24 18:14:38,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 18:14:38,568 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2020-09-24 18:14:38,568 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2108677655]
[2020-09-24 18:14:38,568 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 18:14:38,569 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8
[2020-09-24 18:14:38,569 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120996619]
[2020-09-24 18:14:38,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states
[2020-09-24 18:14:38,570 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 18:14:38,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2020-09-24 18:14:38,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2020-09-24 18:14:38,571 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 8 states.
[2020-09-24 18:14:38,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 18:14:38,660 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions.
[2020-09-24 18:14:38,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states.
[2020-09-24 18:14:38,660 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28
[2020-09-24 18:14:38,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 18:14:38,662 INFO L225 Difference]: With dead ends: 57
[2020-09-24 18:14:38,662 INFO L226 Difference]: Without dead ends: 37
[2020-09-24 18:14:38,663 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2020-09-24 18:14:38,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states.
[2020-09-24 18:14:38,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35.
[2020-09-24 18:14:38,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states.
[2020-09-24 18:14:38,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions.
[2020-09-24 18:14:38,671 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 28
[2020-09-24 18:14:38,671 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-24 18:14:38,671 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions.
[2020-09-24 18:14:38,671 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states.
[2020-09-24 18:14:38,671 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions.
[2020-09-24 18:14:38,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39
[2020-09-24 18:14:38,673 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-24 18:14:38,673 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 18:14:38,673 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-09-24 18:14:38,674 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 18:14:38,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 18:14:38,674 INFO L82 PathProgramCache]: Analyzing trace with hash 41013968, now seen corresponding path program 2 times
[2020-09-24 18:14:38,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 18:14:38,675 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [250829973]
[2020-09-24 18:14:38,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 18:14:38,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat
[2020-09-24 18:14:38,693 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace
[2020-09-24 18:14:38,693 INFO L520 BasicCegarLoop]: Counterexample might be feasible
[2020-09-24 18:14:38,698 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2020-09-24 18:14:38,720 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 06:14:38 BoogieIcfgContainer
[2020-09-24 18:14:38,720 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-09-24 18:14:38,724 INFO L168 Benchmark]: Toolchain (without parser) took 2896.05 ms. Allocated memory was 146.8 MB in the beginning and 234.4 MB in the end (delta: 87.6 MB). Free memory was 103.3 MB in the beginning and 149.6 MB in the end (delta: -46.3 MB). Peak memory consumption was 41.3 MB. Max. memory is 7.1 GB.
[2020-09-24 18:14:38,725 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 146.8 MB. Free memory was 121.4 MB in the beginning and 121.2 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB.
[2020-09-24 18:14:38,726 INFO L168 Benchmark]: CACSL2BoogieTranslator took 280.46 ms. Allocated memory is still 146.8 MB. Free memory was 102.6 MB in the beginning and 93.4 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB.
[2020-09-24 18:14:38,727 INFO L168 Benchmark]: Boogie Preprocessor took 32.43 ms. Allocated memory is still 146.8 MB. Free memory was 93.4 MB in the beginning and 92.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB.
[2020-09-24 18:14:38,728 INFO L168 Benchmark]: RCFGBuilder took 365.00 ms. Allocated memory was 146.8 MB in the beginning and 202.9 MB in the end (delta: 56.1 MB). Free memory was 92.0 MB in the beginning and 169.8 MB in the end (delta: -77.8 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB.
[2020-09-24 18:14:38,729 INFO L168 Benchmark]: TraceAbstraction took 2208.98 ms. Allocated memory was 202.9 MB in the beginning and 234.4 MB in the end (delta: 31.5 MB). Free memory was 169.1 MB in the beginning and 149.6 MB in the end (delta: 19.6 MB). Peak memory consumption was 51.0 MB. Max. memory is 7.1 GB.
[2020-09-24 18:14:38,733 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 146.8 MB. Free memory was 121.4 MB in the beginning and 121.2 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB.
* CACSL2BoogieTranslator took 280.46 ms. Allocated memory is still 146.8 MB. Free memory was 102.6 MB in the beginning and 93.4 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB.
* Boogie Preprocessor took 32.43 ms. Allocated memory is still 146.8 MB. Free memory was 93.4 MB in the beginning and 92.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB.
* RCFGBuilder took 365.00 ms. Allocated memory was 146.8 MB in the beginning and 202.9 MB in the end (delta: 56.1 MB). Free memory was 92.0 MB in the beginning and 169.8 MB in the end (delta: -77.8 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB.
* TraceAbstraction took 2208.98 ms. Allocated memory was 202.9 MB in the beginning and 234.4 MB in the end (delta: 31.5 MB). Free memory was 169.1 MB in the beginning and 149.6 MB in the end (delta: 19.6 MB). Peak memory consumption was 51.0 MB. Max. memory is 7.1 GB.
* Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
- CounterExampleResult [Line: 15]: a call of __VERIFIER_error() is reachable
a call of __VERIFIER_error() is reachable
We found a FailurePath:
[L12] int input = __VERIFIER_nondet_int();
[L13] CALL, EXPR id(input)
[L5] COND FALSE !(x==0)
[L6] CALL, EXPR id((unsigned int)x-1)
[L5] COND FALSE !(x==0)
[L6] CALL, EXPR id((unsigned int)x-1)
[L5] COND TRUE x==0
[L5] return 0;
[L6] RET, EXPR id((unsigned int)x-1)
[L6] int ret = id((unsigned int)x-1) + 1;
[L7] COND FALSE !(ret > 3)
[L8] return ret;
[L6] RET, EXPR id((unsigned int)x-1)
[L6] int ret = id((unsigned int)x-1) + 1;
[L7] COND FALSE !(ret > 3)
[L8] return ret;
[L13] RET, EXPR id(input)
[L13] int result = id(input);
[L14] COND TRUE result == 2
[L15] __VERIFIER_error()
- StatisticsResult: Ultimate Automizer benchmark data
CFG has 4 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.1s, OverallIterations: 4, TraceHistogramMax: 3, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 81 SDtfs, 8 SDslu, 271 SDs, 0 SdLazy, 71 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred 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, 3 MinimizatonAttempts, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 112 NumberOfCodeBlocks, 112 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 71 ConstructedInterpolants, 0 QuantifiedInterpolants, 2977 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 2 PerfectInterpolantSequences, 6/8 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...