/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=1.0 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/n.c11.c
--------------------------------------------------------------------------------
This is Ultimate 0.1.25-c90d42b
[2020-09-25 09:10:10,968 INFO L177 SettingsManager]: Resetting all preferences to default values...
[2020-09-25 09:10:10,973 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values
[2020-09-25 09:10:11,019 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-09-25 09:10:11,019 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-09-25 09:10:11,030 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-09-25 09:10:11,032 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-09-25 09:10:11,036 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values
[2020-09-25 09:10:11,039 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-09-25 09:10:11,042 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-09-25 09:10:11,044 INFO L181 SettingsManager]: Resetting Sifa preferences to default values
[2020-09-25 09:10:11,045 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-09-25 09:10:11,045 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-09-25 09:10:11,049 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-09-25 09:10:11,051 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-09-25 09:10:11,053 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-09-25 09:10:11,055 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-09-25 09:10:11,056 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-09-25 09:10:11,058 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-09-25 09:10:11,067 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values
[2020-09-25 09:10:11,070 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-09-25 09:10:11,071 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-09-25 09:10:11,072 INFO L181 SettingsManager]: Resetting Referee preferences to default values
[2020-09-25 09:10:11,073 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-09-25 09:10:11,075 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-09-25 09:10:11,076 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-09-25 09:10:11,076 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-09-25 09:10:11,079 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-09-25 09:10:11,079 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-09-25 09:10:11,081 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-09-25 09:10:11,082 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-09-25 09:10:11,083 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-09-25 09:10:11,084 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-09-25 09:10:11,084 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values
[2020-09-25 09:10:11,086 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-09-25 09:10:11,086 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values
[2020-09-25 09:10:11,087 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-09-25 09:10:11,087 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-09-25 09:10:11,087 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values
[2020-09-25 09:10:11,088 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values
[2020-09-25 09:10:11,090 INFO L188 SettingsManager]: Finished resetting all preferences to default values...
[2020-09-25 09:10:11,091 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 09:10:11,141 INFO L113 SettingsManager]: Loading preferences was successful
[2020-09-25 09:10:11,141 INFO L115 SettingsManager]: Preferences different from defaults after loading the file:
[2020-09-25 09:10:11,143 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-09-25 09:10:11,143 INFO L138 SettingsManager]: * Create parallel compositions if possible=false
[2020-09-25 09:10:11,143 INFO L138 SettingsManager]: * Use SBE=true
[2020-09-25 09:10:11,144 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-09-25 09:10:11,144 INFO L138 SettingsManager]: * sizeof long=4
[2020-09-25 09:10:11,144 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true
[2020-09-25 09:10:11,145 INFO L138 SettingsManager]: * sizeof POINTER=4
[2020-09-25 09:10:11,145 INFO L138 SettingsManager]: * Check division by zero=IGNORE
[2020-09-25 09:10:11,146 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE
[2020-09-25 09:10:11,146 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-09-25 09:10:11,147 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE
[2020-09-25 09:10:11,147 INFO L138 SettingsManager]: * sizeof long double=12
[2020-09-25 09:10:11,147 INFO L138 SettingsManager]: * Check if freed pointer was valid=false
[2020-09-25 09:10:11,147 INFO L138 SettingsManager]: * Use constant arrays=true
[2020-09-25 09:10:11,148 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE
[2020-09-25 09:10:11,148 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-09-25 09:10:11,148 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements
[2020-09-25 09:10:11,148 INFO L138 SettingsManager]: * To the following directory=./dump/
[2020-09-25 09:10:11,149 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode
[2020-09-25 09:10:11,149 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-09-25 09:10:11,149 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-09-25 09:10:11,149 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP
[2020-09-25 09:10:11,149 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-09-25 09:10:11,150 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL
[2020-09-25 09:10:11,150 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-09-25 09:10:11,150 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-09-25 09:10:11,150 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE
[2020-09-25 09:10:11,150 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true;
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true;
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true;
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true;
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true;
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true;
[2020-09-25 09:10:11,603 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp
[2020-09-25 09:10:11,622 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-09-25 09:10:11,627 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-09-25 09:10:11,629 INFO L271 PluginConnector]: Initializing CDTParser...
[2020-09-25 09:10:11,629 INFO L275 PluginConnector]: CDTParser initialized
[2020-09-25 09:10:11,631 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/n.c11.c
[2020-09-25 09:10:11,739 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c2b9bf8b1/fed14da1775546e3a46341dba198c5e1/FLAGcdb68fa12
[2020-09-25 09:10:12,303 INFO L306 CDTParser]: Found 1 translation units.
[2020-09-25 09:10:12,304 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/n.c11.c
[2020-09-25 09:10:12,313 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c2b9bf8b1/fed14da1775546e3a46341dba198c5e1/FLAGcdb68fa12
[2020-09-25 09:10:12,661 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c2b9bf8b1/fed14da1775546e3a46341dba198c5e1
[2020-09-25 09:10:12,676 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-09-25 09:10:12,681 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements.
[2020-09-25 09:10:12,682 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-09-25 09:10:12,682 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-09-25 09:10:12,687 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized
[2020-09-25 09:10:12,688 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 09:10:12" (1/1) ...
[2020-09-25 09:10:12,693 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@678b2c62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:10:12, skipping insertion in model container
[2020-09-25 09:10:12,694 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 09:10:12" (1/1) ...
[2020-09-25 09:10:12,703 INFO L145 MainTranslator]: Starting translation in SV-COMP mode
[2020-09-25 09:10:12,728 INFO L178 MainTranslator]: Built tables and reachable declarations
[2020-09-25 09:10:12,951 INFO L206 PostProcessor]: Analyzing one entry point: main
[2020-09-25 09:10:12,957 INFO L203 MainTranslator]: Completed pre-run
[2020-09-25 09:10:12,978 INFO L206 PostProcessor]: Analyzing one entry point: main
[2020-09-25 09:10:12,998 INFO L208 MainTranslator]: Completed translation
[2020-09-25 09:10:12,998 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:10:12 WrapperNode
[2020-09-25 09:10:12,999 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-09-25 09:10:13,000 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-09-25 09:10:13,000 INFO L271 PluginConnector]: Initializing Boogie Preprocessor...
[2020-09-25 09:10:13,000 INFO L275 PluginConnector]: Boogie Preprocessor initialized
[2020-09-25 09:10:13,015 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:10:12" (1/1) ...
[2020-09-25 09:10:13,015 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:10:12" (1/1) ...
[2020-09-25 09:10:13,100 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:10:12" (1/1) ...
[2020-09-25 09:10:13,101 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:10:12" (1/1) ...
[2020-09-25 09:10:13,104 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:10:12" (1/1) ...
[2020-09-25 09:10:13,111 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:10:12" (1/1) ...
[2020-09-25 09:10:13,112 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:10:12" (1/1) ...
[2020-09-25 09:10:13,114 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-09-25 09:10:13,114 INFO L113 PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-09-25 09:10:13,114 INFO L271 PluginConnector]: Initializing RCFGBuilder...
[2020-09-25 09:10:13,115 INFO L275 PluginConnector]: RCFGBuilder initialized
[2020-09-25 09:10:13,116 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:10:12" (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 09:10:13,187 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-09-25 09:10:13,187 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-09-25 09:10:13,188 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2020-09-25 09:10:13,188 INFO L138 BoogieDeclarations]: Found implementation of procedure main
[2020-09-25 09:10:13,188 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-09-25 09:10:13,188 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2020-09-25 09:10:13,188 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool
[2020-09-25 09:10:13,188 INFO L130 BoogieDeclarations]: Found specification of procedure main
[2020-09-25 09:10:13,189 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-09-25 09:10:13,189 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-09-25 09:10:13,411 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-09-25 09:10:13,411 INFO L295 CfgBuilder]: Removed 1 assume(true) statements.
[2020-09-25 09:10:13,437 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 09:10:13 BoogieIcfgContainer
[2020-09-25 09:10:13,437 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-09-25 09:10:13,441 INFO L113 PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-09-25 09:10:13,441 INFO L271 PluginConnector]: Initializing TraceAbstraction...
[2020-09-25 09:10:13,447 INFO L275 PluginConnector]: TraceAbstraction initialized
[2020-09-25 09:10:13,447 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 09:10:12" (1/3) ...
[2020-09-25 09:10:13,449 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7aacea9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 09:10:13, skipping insertion in model container
[2020-09-25 09:10:13,449 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:10:12" (2/3) ...
[2020-09-25 09:10:13,455 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7aacea9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 09:10:13, skipping insertion in model container
[2020-09-25 09:10:13,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 09:10:13" (3/3) ...
[2020-09-25 09:10:13,458 INFO L109 eAbstractionObserver]: Analyzing ICFG n.c11.c
[2020-09-25 09:10:13,470 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-09-25 09:10:13,482 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-09-25 09:10:13,506 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-09-25 09:10:13,533 INFO L375 AbstractCegarLoop]: Interprodecural is true
[2020-09-25 09:10:13,533 INFO L376 AbstractCegarLoop]: Hoare is true
[2020-09-25 09:10:13,533 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-09-25 09:10:13,534 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-09-25 09:10:13,534 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-09-25 09:10:13,534 INFO L380 AbstractCegarLoop]: Difference is false
[2020-09-25 09:10:13,534 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-09-25 09:10:13,534 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-09-25 09:10:13,553 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states.
[2020-09-25 09:10:13,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13
[2020-09-25 09:10:13,560 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-25 09:10:13,562 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-25 09:10:13,562 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-25 09:10:13,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-25 09:10:13,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1430370880, now seen corresponding path program 1 times
[2020-09-25 09:10:13,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-25 09:10:13,578 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1924497717]
[2020-09-25 09:10:13,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-25 09:10:13,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 09:10:13,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 09:10:13,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 09:10:13,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 09:10:13,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21
[2020-09-25 09:10:13,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-09-25 09:10:13,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 108
[2020-09-25 09:10:13,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL
[2020-09-25 09:10:13,790 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0
[2020-09-25 09:10:13,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-25 09:10:13,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14
[2020-09-25 09:10:13,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-25 09:10:13,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4
[2020-09-25 09:10:13,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-25 09:10:13,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 09:10:13,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 09:10:13,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 09:10:13,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-09-25 09:10:13,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 09:10:13,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3
[2020-09-25 09:10:13,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL
[2020-09-25 09:10:13,826 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0
[2020-09-25 09:10:13,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-25 09:10:13,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 09:10:13,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-25 09:10:13,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 09:10:13,833 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 09:10:13,834 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1924497717]
[2020-09-25 09:10:13,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-25 09:10:13,837 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2020-09-25 09:10:13,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381194460]
[2020-09-25 09:10:13,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states
[2020-09-25 09:10:13,843 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-25 09:10:13,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2020-09-25 09:10:13,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2020-09-25 09:10:13,865 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 2 states.
[2020-09-25 09:10:13,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-25 09:10:13,890 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions.
[2020-09-25 09:10:13,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states.
[2020-09-25 09:10:13,892 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12
[2020-09-25 09:10:13,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-25 09:10:13,903 INFO L225 Difference]: With dead ends: 40
[2020-09-25 09:10:13,904 INFO L226 Difference]: Without dead ends: 21
[2020-09-25 09:10:13,908 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2020-09-25 09:10:13,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states.
[2020-09-25 09:10:13,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21.
[2020-09-25 09:10:13,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states.
[2020-09-25 09:10:13,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions.
[2020-09-25 09:10:13,959 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 12
[2020-09-25 09:10:13,960 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-25 09:10:13,960 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions.
[2020-09-25 09:10:13,960 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states.
[2020-09-25 09:10:13,960 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions.
[2020-09-25 09:10:13,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14
[2020-09-25 09:10:13,961 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-25 09:10:13,961 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-25 09:10:13,962 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-09-25 09:10:13,962 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-25 09:10:13,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-25 09:10:13,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1911322683, now seen corresponding path program 1 times
[2020-09-25 09:10:13,963 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-25 09:10:13,964 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2002955752]
[2020-09-25 09:10:13,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-25 09:10:13,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 09:10:13,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 09:10:14,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 09:10:14,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22
[2020-09-25 09:10:14,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 09:10:14,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42
[2020-09-25 09:10:14,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL
[2020-09-25 09:10:14,021 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0
[2020-09-25 09:10:14,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-09-25 09:10:14,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12
[2020-09-25 09:10:14,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9
[2020-09-25 09:10:14,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 09:10:14,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-25 09:10:14,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 09:10:14,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 09:10:14,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 09:10:14,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-09-25 09:10:14,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 09:10:14,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3
[2020-09-25 09:10:14,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL
[2020-09-25 09:10:14,181 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0
[2020-09-25 09:10:14,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-25 09:10:14,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 09:10:14,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-25 09:10:14,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 09:10:14,186 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 09:10:14,186 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2002955752]
[2020-09-25 09:10:14,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-25 09:10:14,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-09-25 09:10:14,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523953615]
[2020-09-25 09:10:14,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-09-25 09:10:14,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-25 09:10:14,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-09-25 09:10:14,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-09-25 09:10:14,191 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 5 states.
[2020-09-25 09:10:14,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-25 09:10:14,269 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions.
[2020-09-25 09:10:14,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states.
[2020-09-25 09:10:14,270 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13
[2020-09-25 09:10:14,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-25 09:10:14,271 INFO L225 Difference]: With dead ends: 45
[2020-09-25 09:10:14,271 INFO L226 Difference]: Without dead ends: 27
[2020-09-25 09:10:14,273 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 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 09:10:14,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states.
[2020-09-25 09:10:14,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24.
[2020-09-25 09:10:14,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states.
[2020-09-25 09:10:14,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions.
[2020-09-25 09:10:14,280 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 13
[2020-09-25 09:10:14,280 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-25 09:10:14,281 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions.
[2020-09-25 09:10:14,281 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-09-25 09:10:14,281 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions.
[2020-09-25 09:10:14,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21
[2020-09-25 09:10:14,282 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-25 09:10:14,282 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-25 09:10:14,283 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-09-25 09:10:14,283 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-25 09:10:14,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-25 09:10:14,283 INFO L82 PathProgramCache]: Analyzing trace with hash -4953541, now seen corresponding path program 1 times
[2020-09-25 09:10:14,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-25 09:10:14,284 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [126074859]
[2020-09-25 09:10:14,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-25 09:10:14,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 09:10:14,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 09:10:14,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 09:10:14,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29
[2020-09-25 09:10:14,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 09:10:14,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 290
[2020-09-25 09:10:14,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL
[2020-09-25 09:10:14,609 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0
[2020-09-25 09:10:14,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6
[2020-09-25 09:10:14,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12
[2020-09-25 09:10:14,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16
[2020-09-25 09:10:14,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 09:10:14,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-25 09:10:14,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 09:10:14,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 09:10:14,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 09:10:14,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-09-25 09:10:14,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 09:10:14,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3
[2020-09-25 09:10:14,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL
[2020-09-25 09:10:14,742 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0
[2020-09-25 09:10:14,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-25 09:10:14,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 09:10:14,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-25 09:10:14,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8
[2020-09-25 09:10:14,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-25 09:10:14,763 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [126074859]
[2020-09-25 09:10:14,763 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-25 09:10:14,764 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7
[2020-09-25 09:10:14,764 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914009436]
[2020-09-25 09:10:14,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states
[2020-09-25 09:10:14,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-25 09:10:14,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2020-09-25 09:10:14,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42
[2020-09-25 09:10:14,766 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 7 states.
[2020-09-25 09:10:14,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-25 09:10:14,935 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions.
[2020-09-25 09:10:14,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states.
[2020-09-25 09:10:14,936 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20
[2020-09-25 09:10:14,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-25 09:10:14,939 INFO L225 Difference]: With dead ends: 52
[2020-09-25 09:10:14,940 INFO L226 Difference]: Without dead ends: 34
[2020-09-25 09:10:14,942 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90
[2020-09-25 09:10:14,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states.
[2020-09-25 09:10:14,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31.
[2020-09-25 09:10:14,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states.
[2020-09-25 09:10:14,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions.
[2020-09-25 09:10:14,958 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 20
[2020-09-25 09:10:14,958 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-25 09:10:14,960 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions.
[2020-09-25 09:10:14,960 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states.
[2020-09-25 09:10:14,961 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions.
[2020-09-25 09:10:14,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28
[2020-09-25 09:10:14,962 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-25 09:10:14,962 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-25 09:10:14,962 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-09-25 09:10:14,963 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-25 09:10:14,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-25 09:10:14,963 INFO L82 PathProgramCache]: Analyzing trace with hash 628881157, now seen corresponding path program 2 times
[2020-09-25 09:10:14,963 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-25 09:10:14,964 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [66991781]
[2020-09-25 09:10:14,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-25 09:10:15,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 09:10:15,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 09:10:15,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 09:10:15,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36
[2020-09-25 09:10:15,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 09:10:15,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 318
[2020-09-25 09:10:15,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL
[2020-09-25 09:10:15,331 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0
[2020-09-25 09:10:15,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8
[2020-09-25 09:10:15,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12
[2020-09-25 09:10:15,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23
[2020-09-25 09:10:15,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 09:10:15,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-25 09:10:15,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 09:10:15,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 09:10:15,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 09:10:15,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-09-25 09:10:15,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 09:10:15,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2
[2020-09-25 09:10:15,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL
[2020-09-25 09:10:15,456 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0
[2020-09-25 09:10:15,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-25 09:10:15,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 09:10:15,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-25 09:10:15,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 09:10:15,461 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-25 09:10:15,461 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [66991781]
[2020-09-25 09:10:15,462 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-25 09:10:15,462 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9
[2020-09-25 09:10:15,462 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549911729]
[2020-09-25 09:10:15,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states
[2020-09-25 09:10:15,463 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-25 09:10:15,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2020-09-25 09:10:15,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72
[2020-09-25 09:10:15,464 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 9 states.
[2020-09-25 09:10:15,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-25 09:10:15,624 INFO L93 Difference]: Finished difference Result 66 states and 70 transitions.
[2020-09-25 09:10:15,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states.
[2020-09-25 09:10:15,625 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27
[2020-09-25 09:10:15,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-25 09:10:15,626 INFO L225 Difference]: With dead ends: 66
[2020-09-25 09:10:15,627 INFO L226 Difference]: Without dead ends: 41
[2020-09-25 09:10:15,628 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182
[2020-09-25 09:10:15,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states.
[2020-09-25 09:10:15,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38.
[2020-09-25 09:10:15,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states.
[2020-09-25 09:10:15,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions.
[2020-09-25 09:10:15,634 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 27
[2020-09-25 09:10:15,635 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-25 09:10:15,635 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions.
[2020-09-25 09:10:15,635 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states.
[2020-09-25 09:10:15,635 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions.
[2020-09-25 09:10:15,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35
[2020-09-25 09:10:15,636 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-25 09:10:15,636 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-25 09:10:15,638 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2020-09-25 09:10:15,638 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-25 09:10:15,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-25 09:10:15,639 INFO L82 PathProgramCache]: Analyzing trace with hash 1577865979, now seen corresponding path program 3 times
[2020-09-25 09:10:15,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-25 09:10:15,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [176302772]
[2020-09-25 09:10:15,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-25 09:10:15,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 09:10:15,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 09:10:16,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 09:10:16,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43
[2020-09-25 09:10:16,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 09:10:16,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 400
[2020-09-25 09:10:16,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL
[2020-09-25 09:10:16,060 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0
[2020-09-25 09:10:16,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10
[2020-09-25 09:10:16,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12
[2020-09-25 09:10:16,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30
[2020-09-25 09:10:16,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 09:10:16,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-25 09:10:16,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 09:10:16,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 09:10:16,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 09:10:16,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-09-25 09:10:16,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 09:10:16,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3
[2020-09-25 09:10:16,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL
[2020-09-25 09:10:16,272 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0
[2020-09-25 09:10:16,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-25 09:10:16,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 09:10:16,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-25 09:10:16,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 09:10:16,280 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-25 09:10:16,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [176302772]
[2020-09-25 09:10:16,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-25 09:10:16,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11
[2020-09-25 09:10:16,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042846787]
[2020-09-25 09:10:16,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states
[2020-09-25 09:10:16,283 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-25 09:10:16,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2020-09-25 09:10:16,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110
[2020-09-25 09:10:16,284 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 11 states.
[2020-09-25 09:10:16,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-25 09:10:16,555 INFO L93 Difference]: Finished difference Result 80 states and 84 transitions.
[2020-09-25 09:10:16,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states.
[2020-09-25 09:10:16,556 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34
[2020-09-25 09:10:16,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-25 09:10:16,557 INFO L225 Difference]: With dead ends: 80
[2020-09-25 09:10:16,557 INFO L226 Difference]: Without dead ends: 48
[2020-09-25 09:10:16,558 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306
[2020-09-25 09:10:16,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states.
[2020-09-25 09:10:16,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45.
[2020-09-25 09:10:16,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states.
[2020-09-25 09:10:16,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions.
[2020-09-25 09:10:16,565 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 34
[2020-09-25 09:10:16,565 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-25 09:10:16,566 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions.
[2020-09-25 09:10:16,566 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states.
[2020-09-25 09:10:16,566 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions.
[2020-09-25 09:10:16,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42
[2020-09-25 09:10:16,567 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-25 09:10:16,567 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-25 09:10:16,568 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2020-09-25 09:10:16,568 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-25 09:10:16,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-25 09:10:16,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1087419973, now seen corresponding path program 4 times
[2020-09-25 09:10:16,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-25 09:10:16,569 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2046996621]
[2020-09-25 09:10:16,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-25 09:10:16,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 09:10:16,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 09:10:17,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 09:10:17,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50
[2020-09-25 09:10:17,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 09:10:17,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 435
[2020-09-25 09:10:17,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL
[2020-09-25 09:10:17,025 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0
[2020-09-25 09:10:17,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12
[2020-09-25 09:10:17,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12
[2020-09-25 09:10:17,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37
[2020-09-25 09:10:17,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 09:10:17,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-25 09:10:17,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 09:10:17,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 09:10:17,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 09:10:17,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-09-25 09:10:17,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 09:10:17,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2
[2020-09-25 09:10:17,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL
[2020-09-25 09:10:17,223 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0
[2020-09-25 09:10:17,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-25 09:10:17,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 09:10:17,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-25 09:10:17,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 09:10:17,229 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-25 09:10:17,229 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2046996621]
[2020-09-25 09:10:17,230 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-25 09:10:17,230 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13
[2020-09-25 09:10:17,230 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970446238]
[2020-09-25 09:10:17,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states
[2020-09-25 09:10:17,231 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-25 09:10:17,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants.
[2020-09-25 09:10:17,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156
[2020-09-25 09:10:17,232 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 13 states.
[2020-09-25 09:10:17,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-25 09:10:17,563 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions.
[2020-09-25 09:10:17,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states.
[2020-09-25 09:10:17,563 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 41
[2020-09-25 09:10:17,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-25 09:10:17,564 INFO L225 Difference]: With dead ends: 62
[2020-09-25 09:10:17,565 INFO L226 Difference]: Without dead ends: 56
[2020-09-25 09:10:17,565 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462
[2020-09-25 09:10:17,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states.
[2020-09-25 09:10:17,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 50.
[2020-09-25 09:10:17,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states.
[2020-09-25 09:10:17,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions.
[2020-09-25 09:10:17,573 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 41
[2020-09-25 09:10:17,573 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-25 09:10:17,573 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions.
[2020-09-25 09:10:17,573 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states.
[2020-09-25 09:10:17,574 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions.
[2020-09-25 09:10:17,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49
[2020-09-25 09:10:17,575 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-25 09:10:17,575 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-25 09:10:17,575 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5
[2020-09-25 09:10:17,576 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-25 09:10:17,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-25 09:10:17,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1795298373, now seen corresponding path program 5 times
[2020-09-25 09:10:17,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-25 09:10:17,577 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [862459175]
[2020-09-25 09:10:17,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-25 09:10:17,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 09:10:17,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 09:10:18,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 09:10:18,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57
[2020-09-25 09:10:18,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 09:10:18,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 500
[2020-09-25 09:10:18,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL
[2020-09-25 09:10:18,098 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0
[2020-09-25 09:10:18,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10
[2020-09-25 09:10:18,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12
[2020-09-25 09:10:18,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33
[2020-09-25 09:10:18,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-25 09:10:18,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-25 09:10:18,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 09:10:18,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 09:10:18,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 09:10:18,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-09-25 09:10:18,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 09:10:18,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1
[2020-09-25 09:10:18,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL
[2020-09-25 09:10:18,283 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0
[2020-09-25 09:10:18,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-25 09:10:18,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 09:10:18,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-25 09:10:18,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-25 09:10:18,302 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 21 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-25 09:10:18,304 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [862459175]
[2020-09-25 09:10:18,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-25 09:10:18,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11
[2020-09-25 09:10:18,305 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566174444]
[2020-09-25 09:10:18,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states
[2020-09-25 09:10:18,306 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-25 09:10:18,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2020-09-25 09:10:18,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110
[2020-09-25 09:10:18,307 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 11 states.
[2020-09-25 09:10:18,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-25 09:10:18,573 INFO L93 Difference]: Finished difference Result 79 states and 81 transitions.
[2020-09-25 09:10:18,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states.
[2020-09-25 09:10:18,575 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 48
[2020-09-25 09:10:18,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-25 09:10:18,576 INFO L225 Difference]: With dead ends: 79
[2020-09-25 09:10:18,576 INFO L226 Difference]: Without dead ends: 0
[2020-09-25 09:10:18,577 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342
[2020-09-25 09:10:18,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states.
[2020-09-25 09:10:18,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0.
[2020-09-25 09:10:18,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states.
[2020-09-25 09:10:18,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions.
[2020-09-25 09:10:18,578 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 48
[2020-09-25 09:10:18,578 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-25 09:10:18,579 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions.
[2020-09-25 09:10:18,579 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states.
[2020-09-25 09:10:18,579 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions.
[2020-09-25 09:10:18,579 INFO L282 IsEmpty]: Finished isEmpty. No accepting run.
[2020-09-25 09:10:18,579 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6
[2020-09-25 09:10:18,582 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.
[2020-09-25 09:10:18,690 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true
[2020-09-25 09:10:18,690 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed.
[2020-09-25 09:10:18,690 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed.
[2020-09-25 09:10:18,690 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true
[2020-09-25 09:10:18,690 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true
[2020-09-25 09:10:18,690 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed.
[2020-09-25 09:10:18,690 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 12 32) no Hoare annotation was computed.
[2020-09-25 09:10:18,691 INFO L268 CegarLoopResult]: For program point L21(lines 21 22) no Hoare annotation was computed.
[2020-09-25 09:10:18,691 INFO L268 CegarLoopResult]: For program point L21-2(lines 21 22) no Hoare annotation was computed.
[2020-09-25 09:10:18,691 INFO L268 CegarLoopResult]: For program point L19-1(line 19) no Hoare annotation was computed.
[2020-09-25 09:10:18,691 INFO L268 CegarLoopResult]: For program point L19-3(line 19) no Hoare annotation was computed.
[2020-09-25 09:10:18,691 INFO L264 CegarLoopResult]: At program point L19-4(lines 19 27) the Hoare annotation is: (and (< 0 (+ (div main_~len~0 4294967296) 1)) (<= main_~len~0 4))
[2020-09-25 09:10:18,692 INFO L264 CegarLoopResult]: At program point L19-5(lines 19 27) the Hoare annotation is: (and (< 0 (+ (div main_~len~0 4294967296) 1)) (<= main_~len~0 4))
[2020-09-25 09:10:18,692 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 12 32) no Hoare annotation was computed.
[2020-09-25 09:10:18,692 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 12 32) the Hoare annotation is: true
[2020-09-25 09:10:18,692 INFO L268 CegarLoopResult]: For program point L28(line 28) no Hoare annotation was computed.
[2020-09-25 09:10:18,692 INFO L268 CegarLoopResult]: For program point L26(line 26) no Hoare annotation was computed.
[2020-09-25 09:10:18,692 INFO L268 CegarLoopResult]: For program point L26-1(line 26) no Hoare annotation was computed.
[2020-09-25 09:10:18,692 INFO L268 CegarLoopResult]: For program point L26-2(line 26) no Hoare annotation was computed.
[2020-09-25 09:10:18,692 INFO L268 CegarLoopResult]: For program point L22(line 22) no Hoare annotation was computed.
[2020-09-25 09:10:18,693 INFO L268 CegarLoopResult]: For program point L16(line 16) no Hoare annotation was computed.
[2020-09-25 09:10:18,693 INFO L268 CegarLoopResult]: For program point L14(line 14) no Hoare annotation was computed.
[2020-09-25 09:10:18,693 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true
[2020-09-25 09:10:18,693 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed.
[2020-09-25 09:10:18,693 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed.
[2020-09-25 09:10:18,693 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed.
[2020-09-25 09:10:18,694 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed.
[2020-09-25 09:10:18,694 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 8) no Hoare annotation was computed.
[2020-09-25 09:10:18,715 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 09:10:18 BoogieIcfgContainer
[2020-09-25 09:10:18,716 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-09-25 09:10:18,719 INFO L168 Benchmark]: Toolchain (without parser) took 6040.11 ms. Allocated memory was 140.5 MB in the beginning and 280.0 MB in the end (delta: 139.5 MB). Free memory was 102.0 MB in the beginning and 204.5 MB in the end (delta: -102.5 MB). Peak memory consumption was 37.0 MB. Max. memory is 7.1 GB.
[2020-09-25 09:10:18,720 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 140.5 MB. Free memory was 120.7 MB in the beginning and 120.5 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB.
[2020-09-25 09:10:18,721 INFO L168 Benchmark]: CACSL2BoogieTranslator took 317.17 ms. Allocated memory is still 140.5 MB. Free memory was 101.4 MB in the beginning and 91.9 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB.
[2020-09-25 09:10:18,722 INFO L168 Benchmark]: Boogie Preprocessor took 114.11 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 91.9 MB in the beginning and 181.5 MB in the end (delta: -89.6 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB.
[2020-09-25 09:10:18,723 INFO L168 Benchmark]: RCFGBuilder took 323.01 ms. Allocated memory is still 203.4 MB. Free memory was 181.5 MB in the beginning and 169.9 MB in the end (delta: 11.6 MB). Peak memory consumption was 11.6 MB. Max. memory is 7.1 GB.
[2020-09-25 09:10:18,724 INFO L168 Benchmark]: TraceAbstraction took 5275.00 ms. Allocated memory was 203.4 MB in the beginning and 280.0 MB in the end (delta: 76.5 MB). Free memory was 169.3 MB in the beginning and 204.5 MB in the end (delta: -35.3 MB). Peak memory consumption was 41.3 MB. Max. memory is 7.1 GB.
[2020-09-25 09:10:18,728 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] #######################
--- Results ---
* Results from de.uni_freiburg.informatik.ultimate.core:
- StatisticsResult: Toolchain Benchmarks
Benchmark results are:
* CDTParser took 0.24 ms. Allocated memory is still 140.5 MB. Free memory was 120.7 MB in the beginning and 120.5 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB.
* CACSL2BoogieTranslator took 317.17 ms. Allocated memory is still 140.5 MB. Free memory was 101.4 MB in the beginning and 91.9 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB.
* Boogie Preprocessor took 114.11 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 91.9 MB in the beginning and 181.5 MB in the end (delta: -89.6 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB.
* RCFGBuilder took 323.01 ms. Allocated memory is still 203.4 MB. Free memory was 181.5 MB in the beginning and 169.9 MB in the end (delta: 11.6 MB). Peak memory consumption was 11.6 MB. Max. memory is 7.1 GB.
* TraceAbstraction took 5275.00 ms. Allocated memory was 203.4 MB in the beginning and 280.0 MB in the end (delta: 76.5 MB). Free memory was 169.3 MB in the beginning and 204.5 MB in the end (delta: -35.3 MB). Peak memory consumption was 41.3 MB. Max. memory is 7.1 GB.
* Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
- PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable
For all program executions holds that call of __VERIFIER_error() unreachable at this location
- AllSpecificationsHoldResult: All specifications hold
1 specifications checked. All of them hold
- InvariantResult [Line: 19]: Loop Invariant
Derived loop invariant: 0 < len / 4294967296 + 1 && len <= 4
- StatisticsResult: Ultimate Automizer benchmark data
CFG has 4 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5.0s, OverallIterations: 7, TraceHistogramMax: 5, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 154 SDtfs, 92 SDslu, 770 SDs, 0 SdLazy, 619 SolverSat, 37 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 105 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=50occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 18 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 17 PreInvPairs, 27 NumberOfFragments, 27 HoareAnnotationTreeSize, 17 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 112 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 3.1s InterpolantComputationTime, 195 NumberOfCodeBlocks, 195 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 188 ConstructedInterpolants, 0 QuantifiedInterpolants, 34438 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 2 PerfectInterpolantSequences, 21/155 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available
RESULT: Ultimate proved your program to be correct!
Received shutdown request...