/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=NARROWEST --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_o3.c
--------------------------------------------------------------------------------
This is Ultimate 0.1.25-c90d42b
[2020-09-25 02:03:59,079 INFO L177 SettingsManager]: Resetting all preferences to default values...
[2020-09-25 02:03:59,082 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values
[2020-09-25 02:03:59,109 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-09-25 02:03:59,110 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-09-25 02:03:59,111 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-09-25 02:03:59,112 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-09-25 02:03:59,114 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values
[2020-09-25 02:03:59,116 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-09-25 02:03:59,117 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-09-25 02:03:59,118 INFO L181 SettingsManager]: Resetting Sifa preferences to default values
[2020-09-25 02:03:59,119 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-09-25 02:03:59,119 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-09-25 02:03:59,120 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-09-25 02:03:59,121 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-09-25 02:03:59,123 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-09-25 02:03:59,123 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-09-25 02:03:59,124 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-09-25 02:03:59,126 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-09-25 02:03:59,128 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values
[2020-09-25 02:03:59,130 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-09-25 02:03:59,131 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-09-25 02:03:59,132 INFO L181 SettingsManager]: Resetting Referee preferences to default values
[2020-09-25 02:03:59,133 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-09-25 02:03:59,136 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-09-25 02:03:59,136 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-09-25 02:03:59,136 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-09-25 02:03:59,138 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-09-25 02:03:59,138 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-09-25 02:03:59,139 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-09-25 02:03:59,139 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-09-25 02:03:59,140 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-09-25 02:03:59,141 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-09-25 02:03:59,142 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values
[2020-09-25 02:03:59,143 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-09-25 02:03:59,144 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values
[2020-09-25 02:03:59,145 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-09-25 02:03:59,145 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-09-25 02:03:59,145 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values
[2020-09-25 02:03:59,146 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values
[2020-09-25 02:03:59,147 INFO L188 SettingsManager]: Finished resetting all preferences to default values...
[2020-09-25 02:03:59,148 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf
[2020-09-25 02:03:59,180 INFO L113 SettingsManager]: Loading preferences was successful
[2020-09-25 02:03:59,184 INFO L115 SettingsManager]: Preferences different from defaults after loading the file:
[2020-09-25 02:03:59,185 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-09-25 02:03:59,185 INFO L138 SettingsManager]: * Create parallel compositions if possible=false
[2020-09-25 02:03:59,186 INFO L138 SettingsManager]: * Use SBE=true
[2020-09-25 02:03:59,186 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-09-25 02:03:59,186 INFO L138 SettingsManager]: * sizeof long=4
[2020-09-25 02:03:59,186 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true
[2020-09-25 02:03:59,186 INFO L138 SettingsManager]: * sizeof POINTER=4
[2020-09-25 02:03:59,187 INFO L138 SettingsManager]: * Check division by zero=IGNORE
[2020-09-25 02:03:59,187 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE
[2020-09-25 02:03:59,187 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-09-25 02:03:59,187 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE
[2020-09-25 02:03:59,187 INFO L138 SettingsManager]: * sizeof long double=12
[2020-09-25 02:03:59,189 INFO L138 SettingsManager]: * Check if freed pointer was valid=false
[2020-09-25 02:03:59,189 INFO L138 SettingsManager]: * Use constant arrays=true
[2020-09-25 02:03:59,189 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE
[2020-09-25 02:03:59,189 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-09-25 02:03:59,190 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements
[2020-09-25 02:03:59,190 INFO L138 SettingsManager]: * To the following directory=./dump/
[2020-09-25 02:03:59,190 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode
[2020-09-25 02:03:59,191 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-09-25 02:03:59,191 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-09-25 02:03:59,191 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP
[2020-09-25 02:03:59,191 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-09-25 02:03:59,191 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL
[2020-09-25 02:03:59,192 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-09-25 02:03:59,192 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-09-25 02:03:59,192 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE
[2020-09-25 02:03:59,192 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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;log-additional-information=true;
[2020-09-25 02:03:59,693 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp
[2020-09-25 02:03:59,720 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-09-25 02:03:59,725 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-09-25 02:03:59,728 INFO L271 PluginConnector]: Initializing CDTParser...
[2020-09-25 02:03:59,729 INFO L275 PluginConnector]: CDTParser initialized
[2020-09-25 02:03:59,730 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_o3.c
[2020-09-25 02:03:59,829 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bb2f37b9c/3b012d62e3194f04b71856603b942c0f/FLAGb6ef85628
[2020-09-25 02:04:00,383 INFO L306 CDTParser]: Found 1 translation units.
[2020-09-25 02:04:00,384 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id_o3.c
[2020-09-25 02:04:00,392 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bb2f37b9c/3b012d62e3194f04b71856603b942c0f/FLAGb6ef85628
[2020-09-25 02:04:00,723 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bb2f37b9c/3b012d62e3194f04b71856603b942c0f
[2020-09-25 02:04:00,738 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-09-25 02:04:00,745 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements.
[2020-09-25 02:04:00,746 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-09-25 02:04:00,746 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-09-25 02:04:00,750 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized
[2020-09-25 02:04:00,752 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:04:00" (1/1) ...
[2020-09-25 02:04:00,756 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@238a6ce5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:04:00, skipping insertion in model container
[2020-09-25 02:04:00,756 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:04:00" (1/1) ...
[2020-09-25 02:04:00,765 INFO L145 MainTranslator]: Starting translation in SV-COMP mode
[2020-09-25 02:04:00,790 INFO L178 MainTranslator]: Built tables and reachable declarations
[2020-09-25 02:04:00,998 INFO L206 PostProcessor]: Analyzing one entry point: main
[2020-09-25 02:04:01,003 INFO L203 MainTranslator]: Completed pre-run
[2020-09-25 02:04:01,020 INFO L206 PostProcessor]: Analyzing one entry point: main
[2020-09-25 02:04:01,035 INFO L208 MainTranslator]: Completed translation
[2020-09-25 02:04:01,036 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:04:01 WrapperNode
[2020-09-25 02:04:01,036 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-09-25 02:04:01,037 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-09-25 02:04:01,037 INFO L271 PluginConnector]: Initializing Boogie Preprocessor...
[2020-09-25 02:04:01,037 INFO L275 PluginConnector]: Boogie Preprocessor initialized
[2020-09-25 02:04:01,053 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:04:01" (1/1) ...
[2020-09-25 02:04:01,053 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:04:01" (1/1) ...
[2020-09-25 02:04:01,058 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:04:01" (1/1) ...
[2020-09-25 02:04:01,059 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:04:01" (1/1) ...
[2020-09-25 02:04:01,062 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:04:01" (1/1) ...
[2020-09-25 02:04:01,064 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:04:01" (1/1) ...
[2020-09-25 02:04:01,065 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:04:01" (1/1) ...
[2020-09-25 02:04:01,066 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-09-25 02:04:01,067 INFO L113 PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-09-25 02:04:01,067 INFO L271 PluginConnector]: Initializing RCFGBuilder...
[2020-09-25 02:04:01,067 INFO L275 PluginConnector]: RCFGBuilder initialized
[2020-09-25 02:04:01,068 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:04:01" (1/1) ...
No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-09-25 02:04:01,232 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-09-25 02:04:01,232 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-09-25 02:04:01,232 INFO L138 BoogieDeclarations]: Found implementation of procedure id
[2020-09-25 02:04:01,232 INFO L138 BoogieDeclarations]: Found implementation of procedure main
[2020-09-25 02:04:01,232 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint
[2020-09-25 02:04:01,233 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-09-25 02:04:01,233 INFO L130 BoogieDeclarations]: Found specification of procedure id
[2020-09-25 02:04:01,233 INFO L130 BoogieDeclarations]: Found specification of procedure main
[2020-09-25 02:04:01,234 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-09-25 02:04:01,234 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-09-25 02:04:01,418 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-09-25 02:04:01,419 INFO L295 CfgBuilder]: Removed 0 assume(true) statements.
[2020-09-25 02:04:01,423 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:04:01 BoogieIcfgContainer
[2020-09-25 02:04:01,424 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-09-25 02:04:01,425 INFO L113 PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-09-25 02:04:01,425 INFO L271 PluginConnector]: Initializing TraceAbstraction...
[2020-09-25 02:04:01,429 INFO L275 PluginConnector]: TraceAbstraction initialized
[2020-09-25 02:04:01,429 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 02:04:00" (1/3) ...
[2020-09-25 02:04:01,430 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@247c06b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:04:01, skipping insertion in model container
[2020-09-25 02:04:01,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:04:01" (2/3) ...
[2020-09-25 02:04:01,431 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@247c06b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:04:01, skipping insertion in model container
[2020-09-25 02:04:01,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:04:01" (3/3) ...
[2020-09-25 02:04:01,434 INFO L109 eAbstractionObserver]: Analyzing ICFG id_o3.c
[2020-09-25 02:04:01,446 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-09-25 02:04:01,456 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-09-25 02:04:01,479 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-09-25 02:04:01,511 INFO L375 AbstractCegarLoop]: Interprodecural is true
[2020-09-25 02:04:01,511 INFO L376 AbstractCegarLoop]: Hoare is true
[2020-09-25 02:04:01,511 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-09-25 02:04:01,512 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-09-25 02:04:01,512 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-09-25 02:04:01,512 INFO L380 AbstractCegarLoop]: Difference is false
[2020-09-25 02:04:01,512 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-09-25 02:04:01,512 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-09-25 02:04:01,536 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states.
[2020-09-25 02:04:01,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17
[2020-09-25 02:04:01,544 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-25 02:04:01,545 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-25 02:04:01,545 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-25 02:04:01,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-25 02:04:01,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1651991454, now seen corresponding path program 1 times
[2020-09-25 02:04:01,562 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-25 02:04:01,563 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1250584408]
[2020-09-25 02:04:01,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-25 02:04:01,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 02:04:01,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 02:04:01,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 02:04:01,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25
[2020-09-25 02:04:01,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 02:04:01,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 84
[2020-09-25 02:04:01,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST
[2020-09-25 02:04:01,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-09-25 02:04:01,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18
[2020-09-25 02:04:01,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6
[2020-09-25 02:04:01,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2
[2020-09-25 02:04:01,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-25 02:04:01,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 02:04:01,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 02:04:01,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 02:04:01,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-09-25 02:04:01,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 02:04:01,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3
[2020-09-25 02:04:01,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST
[2020-09-25 02:04:01,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-25 02:04:01,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 02:04:01,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-25 02:04:01,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 02:04:01,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2020-09-25 02:04:01,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 02:04:01,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 02:04:01,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 02:04:01,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-25 02:04:01,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 02:04:01,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25
[2020-09-25 02:04:01,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST
[2020-09-25 02:04:01,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3
[2020-09-25 02:04:01,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 02:04:01,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6
[2020-09-25 02:04:01,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-25 02:04:02,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-25 02:04:02,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1250584408]
[2020-09-25 02:04:02,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-25 02:04:02,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-09-25 02:04:02,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945066391]
[2020-09-25 02:04:02,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-09-25 02:04:02,016 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-25 02:04:02,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-09-25 02:04:02,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-09-25 02:04:02,040 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states.
[2020-09-25 02:04:02,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-25 02:04:02,127 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions.
[2020-09-25 02:04:02,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states.
[2020-09-25 02:04:02,129 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16
[2020-09-25 02:04:02,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-25 02:04:02,145 INFO L225 Difference]: With dead ends: 37
[2020-09-25 02:04:02,146 INFO L226 Difference]: Without dead ends: 22
[2020-09-25 02:04:02,150 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
[2020-09-25 02:04:02,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states.
[2020-09-25 02:04:02,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22.
[2020-09-25 02:04:02,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states.
[2020-09-25 02:04:02,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions.
[2020-09-25 02:04:02,207 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 16
[2020-09-25 02:04:02,207 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-25 02:04:02,207 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions.
[2020-09-25 02:04:02,207 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-09-25 02:04:02,208 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions.
[2020-09-25 02:04:02,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24
[2020-09-25 02:04:02,210 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-25 02:04:02,210 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]
[2020-09-25 02:04:02,211 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-09-25 02:04:02,211 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-25 02:04:02,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-25 02:04:02,212 INFO L82 PathProgramCache]: Analyzing trace with hash 189324707, now seen corresponding path program 1 times
[2020-09-25 02:04:02,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-25 02:04:02,212 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1479864776]
[2020-09-25 02:04:02,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-25 02:04:02,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 02:04:02,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 02:04:02,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 02:04:02,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34
[2020-09-25 02:04:02,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 02:04:02,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 223
[2020-09-25 02:04:02,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST
[2020-09-25 02:04:02,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6
[2020-09-25 02:04:02,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23
[2020-09-25 02:04:02,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10
[2020-09-25 02:04:02,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6
[2020-09-25 02:04:02,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-25 02:04:02,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 02:04:02,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 02:04:02,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 02:04:02,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-09-25 02:04:02,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 02:04:02,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3
[2020-09-25 02:04:02,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST
[2020-09-25 02:04:02,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-25 02:04:02,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 02:04:02,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-25 02:04:02,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 02:04:02,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2020-09-25 02:04:02,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 02:04:02,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 02:04:02,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 02:04:02,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20
[2020-09-25 02:04:02,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 02:04:02,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 92
[2020-09-25 02:04:02,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST
[2020-09-25 02:04:02,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5
[2020-09-25 02:04:02,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 02:04:02,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15
[2020-09-25 02:04:02,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4
[2020-09-25 02:04:02,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2020-09-25 02:04:02,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 02:04:02,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 02:04:02,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 02:04:02,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-25 02:04:02,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 02:04:02,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55
[2020-09-25 02:04:02,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST
[2020-09-25 02:04:02,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3
[2020-09-25 02:04:02,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 02:04:02,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6
[2020-09-25 02:04:02,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-25 02:04:02,827 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2020-09-25 02:04:02,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1479864776]
[2020-09-25 02:04:02,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-25 02:04:02,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7
[2020-09-25 02:04:02,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585012044]
[2020-09-25 02:04:02,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states
[2020-09-25 02:04:02,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-25 02:04:02,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2020-09-25 02:04:02,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2020-09-25 02:04:02,835 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 7 states.
[2020-09-25 02:04:02,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-25 02:04:02,903 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions.
[2020-09-25 02:04:02,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states.
[2020-09-25 02:04:02,904 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23
[2020-09-25 02:04:02,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-25 02:04:02,906 INFO L225 Difference]: With dead ends: 31
[2020-09-25 02:04:02,906 INFO L226 Difference]: Without dead ends: 26
[2020-09-25 02:04:02,908 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72
[2020-09-25 02:04:02,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states.
[2020-09-25 02:04:02,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26.
[2020-09-25 02:04:02,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states.
[2020-09-25 02:04:02,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions.
[2020-09-25 02:04:02,916 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 23
[2020-09-25 02:04:02,916 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-25 02:04:02,916 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions.
[2020-09-25 02:04:02,916 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states.
[2020-09-25 02:04:02,917 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions.
[2020-09-25 02:04:02,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31
[2020-09-25 02:04:02,918 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-25 02:04:02,918 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-25 02:04:02,918 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-09-25 02:04:02,919 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-25 02:04:02,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-25 02:04:02,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1416732684, now seen corresponding path program 2 times
[2020-09-25 02:04:02,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-25 02:04:02,920 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [957289522]
[2020-09-25 02:04:02,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-25 02:04:02,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 02:04:02,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 02:04:03,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 02:04:03,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43
[2020-09-25 02:04:03,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 02:04:03,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 176
[2020-09-25 02:04:03,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST
[2020-09-25 02:04:03,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8
[2020-09-25 02:04:03,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28
[2020-09-25 02:04:03,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14
[2020-09-25 02:04:03,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4
[2020-09-25 02:04:03,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-25 02:04:03,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 02:04:03,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 02:04:03,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 02:04:03,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-09-25 02:04:03,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 02:04:03,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2
[2020-09-25 02:04:03,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST
[2020-09-25 02:04:03,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-25 02:04:03,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 02:04:03,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-25 02:04:03,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-25 02:04:03,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2020-09-25 02:04:03,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 02:04:03,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 02:04:03,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 02:04:03,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29
[2020-09-25 02:04:03,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 02:04:03,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 94
[2020-09-25 02:04:03,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST
[2020-09-25 02:04:03,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7
[2020-09-25 02:04:03,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 02:04:03,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24
[2020-09-25 02:04:03,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-25 02:04:03,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2020-09-25 02:04:03,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 02:04:03,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 02:04:03,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 02:04:03,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20
[2020-09-25 02:04:03,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 02:04:03,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48
[2020-09-25 02:04:03,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST
[2020-09-25 02:04:03,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5
[2020-09-25 02:04:03,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 02:04:03,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15
[2020-09-25 02:04:03,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 02:04:03,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2020-09-25 02:04:03,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 02:04:03,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 02:04:03,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 02:04:03,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-25 02:04:03,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 02:04:03,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13
[2020-09-25 02:04:03,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST
[2020-09-25 02:04:03,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3
[2020-09-25 02:04:03,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 02:04:03,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6
[2020-09-25 02:04:03,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 02:04:03,472 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked.
[2020-09-25 02:04:03,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [957289522]
[2020-09-25 02:04:03,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-25 02:04:03,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9
[2020-09-25 02:04:03,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415856119]
[2020-09-25 02:04:03,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states
[2020-09-25 02:04:03,475 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-25 02:04:03,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2020-09-25 02:04:03,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72
[2020-09-25 02:04:03,475 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 9 states.
[2020-09-25 02:04:03,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-25 02:04:03,571 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions.
[2020-09-25 02:04:03,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states.
[2020-09-25 02:04:03,572 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30
[2020-09-25 02:04:03,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-25 02:04:03,573 INFO L225 Difference]: With dead ends: 35
[2020-09-25 02:04:03,573 INFO L226 Difference]: Without dead ends: 30
[2020-09-25 02:04:03,574 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132
[2020-09-25 02:04:03,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states.
[2020-09-25 02:04:03,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30.
[2020-09-25 02:04:03,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states.
[2020-09-25 02:04:03,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions.
[2020-09-25 02:04:03,582 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 30
[2020-09-25 02:04:03,582 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-25 02:04:03,582 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions.
[2020-09-25 02:04:03,582 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states.
[2020-09-25 02:04:03,582 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions.
[2020-09-25 02:04:03,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38
[2020-09-25 02:04:03,584 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-25 02:04:03,584 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-25 02:04:03,585 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-09-25 02:04:03,585 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-25 02:04:03,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-25 02:04:03,585 INFO L82 PathProgramCache]: Analyzing trace with hash -209476043, now seen corresponding path program 3 times
[2020-09-25 02:04:03,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-25 02:04:03,586 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1554865975]
[2020-09-25 02:04:03,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-25 02:04:03,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat
[2020-09-25 02:04:03,599 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace
[2020-09-25 02:04:03,600 INFO L520 BasicCegarLoop]: Counterexample might be feasible
[2020-09-25 02:04:03,606 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2020-09-25 02:04:03,629 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 02:04:03 BoogieIcfgContainer
[2020-09-25 02:04:03,629 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-09-25 02:04:03,633 INFO L168 Benchmark]: Toolchain (without parser) took 2891.10 ms. Allocated memory was 136.3 MB in the beginning and 226.5 MB in the end (delta: 90.2 MB). Free memory was 99.4 MB in the beginning and 143.1 MB in the end (delta: -43.7 MB). Peak memory consumption was 46.5 MB. Max. memory is 7.1 GB.
[2020-09-25 02:04:03,634 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 136.3 MB. Free memory was 117.9 MB in the beginning and 117.4 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB.
[2020-09-25 02:04:03,635 INFO L168 Benchmark]: CACSL2BoogieTranslator took 290.29 ms. Allocated memory is still 136.3 MB. Free memory was 98.6 MB in the beginning and 89.6 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 7.1 GB.
[2020-09-25 02:04:03,636 INFO L168 Benchmark]: Boogie Preprocessor took 29.63 ms. Allocated memory is still 136.3 MB. Free memory was 89.6 MB in the beginning and 88.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB.
[2020-09-25 02:04:03,637 INFO L168 Benchmark]: RCFGBuilder took 357.17 ms. Allocated memory was 136.3 MB in the beginning and 198.7 MB in the end (delta: 62.4 MB). Free memory was 87.9 MB in the beginning and 167.0 MB in the end (delta: -79.1 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB.
[2020-09-25 02:04:03,638 INFO L168 Benchmark]: TraceAbstraction took 2204.20 ms. Allocated memory was 198.7 MB in the beginning and 226.5 MB in the end (delta: 27.8 MB). Free memory was 166.0 MB in the beginning and 143.1 MB in the end (delta: 22.9 MB). Peak memory consumption was 50.7 MB. Max. memory is 7.1 GB.
[2020-09-25 02:04:03,642 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 136.3 MB. Free memory was 117.9 MB in the beginning and 117.4 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB.
* CACSL2BoogieTranslator took 290.29 ms. Allocated memory is still 136.3 MB. Free memory was 98.6 MB in the beginning and 89.6 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 7.1 GB.
* Boogie Preprocessor took 29.63 ms. Allocated memory is still 136.3 MB. Free memory was 89.6 MB in the beginning and 88.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB.
* RCFGBuilder took 357.17 ms. Allocated memory was 136.3 MB in the beginning and 198.7 MB in the end (delta: 62.4 MB). Free memory was 87.9 MB in the beginning and 167.0 MB in the end (delta: -79.1 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB.
* TraceAbstraction took 2204.20 ms. Allocated memory was 198.7 MB in the beginning and 226.5 MB in the end (delta: 27.8 MB). Free memory was 166.0 MB in the beginning and 143.1 MB in the end (delta: 22.9 MB). Peak memory consumption was 50.7 MB. Max. memory is 7.1 GB.
* Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
- CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable
a call of __VERIFIER_error() is reachable
We found a FailurePath:
[L10] unsigned int input = __VERIFIER_nondet_uint();
[L11] CALL, EXPR id(input)
[L5] COND FALSE !(x==0)
[L6] CALL, EXPR id(x-1)
[L5] COND FALSE !(x==0)
[L6] CALL, EXPR id(x-1)
[L5] COND FALSE !(x==0)
[L6] CALL, EXPR id(x-1)
[L5] COND TRUE x==0
[L5] return 0;
[L6] RET, EXPR id(x-1)
[L6] return id(x-1) + 1;
[L6] RET, EXPR id(x-1)
[L6] return id(x-1) + 1;
[L6] RET, EXPR id(x-1)
[L6] return id(x-1) + 1;
[L11] RET, EXPR id(input)
[L11] unsigned int result = id(input);
[L12] COND TRUE result == 3
[L13] __VERIFIER_error()
- StatisticsResult: Ultimate Automizer benchmark data
CFG has 4 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.0s, OverallIterations: 4, TraceHistogramMax: 4, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 68 SDtfs, 8 SDslu, 309 SDs, 0 SdLazy, 60 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred 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, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 106 NumberOfCodeBlocks, 106 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 66 ConstructedInterpolants, 0 QuantifiedInterpolants, 5502 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 9/19 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...