/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 SequenceOfStatements --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=0.4 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_2-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 07:30:54,025 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 07:30:54,027 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 07:30:54,051 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 07:30:54,051 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 07:30:54,053 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 07:30:54,054 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 07:30:54,056 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 07:30:54,057 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 07:30:54,058 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 07:30:54,059 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 07:30:54,060 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 07:30:54,060 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 07:30:54,061 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 07:30:54,062 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 07:30:54,063 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 07:30:54,064 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 07:30:54,065 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 07:30:54,067 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 07:30:54,069 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 07:30:54,070 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 07:30:54,071 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 07:30:54,072 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 07:30:54,073 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 07:30:54,076 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 07:30:54,076 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 07:30:54,076 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 07:30:54,077 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 07:30:54,077 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 07:30:54,078 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 07:30:54,078 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 07:30:54,079 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 07:30:54,080 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 07:30:54,081 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 07:30:54,082 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 07:30:54,082 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 07:30:54,082 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 07:30:54,083 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 07:30:54,083 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 07:30:54,084 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 07:30:54,084 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 07:30:54,088 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 [2020-10-14 07:30:54,130 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 07:30:54,131 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 07:30:54,135 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 07:30:54,135 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 07:30:54,135 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 07:30:54,136 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 07:30:54,136 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 07:30:54,136 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 07:30:54,136 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 07:30:54,136 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 07:30:54,137 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 07:30:54,137 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 07:30:54,138 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 07:30:54,138 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 07:30:54,138 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 07:30:54,138 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 07:30:54,139 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 07:30:54,139 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 07:30:54,139 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 07:30:54,140 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 07:30:54,140 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 07:30:54,140 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 07:30:54,140 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 07:30:54,141 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 07:30:54,141 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 07:30:54,141 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 07:30:54,141 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 07:30:54,141 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 07:30:54,142 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 07:30:54,142 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 -> SequenceOfStatements 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=0.4;log-additional-information=true;unknown-allowed=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=0.4;log-additional-information=true;unknown-allowed=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=0.4;log-additional-information=true;unknown-allowed=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=0.4;log-additional-information=true;unknown-allowed=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=0.4;log-additional-information=true;unknown-allowed=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=0.4;log-additional-information=true;unknown-allowed=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=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-14 07:30:54,470 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 07:30:54,481 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 07:30:54,485 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 07:30:54,487 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 07:30:54,487 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 07:30:54,488 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_2-2.c [2020-10-14 07:30:54,549 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bc9a94707/62727f63e7f043568cc744d4d1635908/FLAGf5dea249a [2020-10-14 07:30:54,974 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 07:30:54,974 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/fibo_2calls_2-2.c [2020-10-14 07:30:54,981 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bc9a94707/62727f63e7f043568cc744d4d1635908/FLAGf5dea249a [2020-10-14 07:30:55,403 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bc9a94707/62727f63e7f043568cc744d4d1635908 [2020-10-14 07:30:55,412 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 07:30:55,414 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 07:30:55,415 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 07:30:55,415 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 07:30:55,419 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 07:30:55,420 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 07:30:55" (1/1) ... [2020-10-14 07:30:55,423 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@157daaf4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:30:55, skipping insertion in model container [2020-10-14 07:30:55,423 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 07:30:55" (1/1) ... [2020-10-14 07:30:55,431 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 07:30:55,448 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 07:30:55,634 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 07:30:55,638 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 07:30:55,653 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 07:30:55,665 INFO L208 MainTranslator]: Completed translation [2020-10-14 07:30:55,666 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:30:55 WrapperNode [2020-10-14 07:30:55,666 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 07:30:55,667 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 07:30:55,667 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 07:30:55,667 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 07:30:55,677 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:30:55" (1/1) ... [2020-10-14 07:30:55,677 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:30:55" (1/1) ... [2020-10-14 07:30:55,771 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:30:55" (1/1) ... [2020-10-14 07:30:55,772 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:30:55" (1/1) ... [2020-10-14 07:30:55,777 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:30:55" (1/1) ... [2020-10-14 07:30:55,779 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:30:55" (1/1) ... [2020-10-14 07:30:55,781 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:30:55" (1/1) ... [2020-10-14 07:30:55,782 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 07:30:55,782 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 07:30:55,782 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 07:30:55,783 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 07:30:55,787 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:30:55" (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 [2020-10-14 07:30:55,844 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 07:30:55,844 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 07:30:55,844 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-10-14 07:30:55,845 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-10-14 07:30:55,845 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 07:30:55,845 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-14 07:30:55,845 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 07:30:55,845 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-10-14 07:30:55,845 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-10-14 07:30:55,845 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 07:30:55,845 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 07:30:55,846 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 07:30:56,036 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 07:30:56,036 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-14 07:30:56,041 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 07:30:56 BoogieIcfgContainer [2020-10-14 07:30:56,041 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 07:30:56,043 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 07:30:56,043 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 07:30:56,046 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 07:30:56,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 07:30:55" (1/3) ... [2020-10-14 07:30:56,047 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@591e4c3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 07:30:56, skipping insertion in model container [2020-10-14 07:30:56,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:30:55" (2/3) ... [2020-10-14 07:30:56,048 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@591e4c3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 07:30:56, skipping insertion in model container [2020-10-14 07:30:56,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 07:30:56" (3/3) ... [2020-10-14 07:30:56,049 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_2-2.c [2020-10-14 07:30:56,061 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 07:30:56,068 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 07:30:56,085 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 07:30:56,145 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 07:30:56,145 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 07:30:56,145 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 07:30:56,145 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 07:30:56,146 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 07:30:56,146 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 07:30:56,146 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 07:30:56,146 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 07:30:56,171 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-10-14 07:30:56,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-14 07:30:56,178 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 07:30:56,179 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 07:30:56,182 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 07:30:56,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 07:30:56,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-10-14 07:30:56,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 07:30:56,197 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [114897441] [2020-10-14 07:30:56,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 07:30:56,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 07:30:56,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:30:56,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 07:30:56,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-14 07:30:56,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 07:30:56,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 80 [2020-10-14 07:30:56,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 07:30:56,372 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 07:30:56,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 07:30:56,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 07:30:56,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 07:30:56,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 07:30:56,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 07:30:56,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 07:30:56,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:30:56,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 07:30:56,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 07:30:56,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 07:30:56,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 07:30:56,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 07:30:56,440 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 07:30:56,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 07:30:56,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 07:30:56,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 07:30:56,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 07:30:56,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-14 07:30:56,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 07:30:56,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:30:56,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 07:30:56,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 07:30:56,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 07:30:56,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-14 07:30:56,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 07:30:56,480 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 07:30:56,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 07:30:56,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 07:30:56,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 07:30:56,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 07:30:56,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 07:30:56,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [114897441] [2020-10-14 07:30:56,511 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 07:30:56,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 07:30:56,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187338809] [2020-10-14 07:30:56,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 07:30:56,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 07:30:56,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 07:30:56,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 07:30:56,537 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-10-14 07:30:56,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 07:30:56,643 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-10-14 07:30:56,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 07:30:56,645 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-10-14 07:30:56,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 07:30:56,657 INFO L225 Difference]: With dead ends: 44 [2020-10-14 07:30:56,657 INFO L226 Difference]: Without dead ends: 30 [2020-10-14 07:30:56,661 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 07:30:56,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-14 07:30:56,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-14 07:30:56,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-14 07:30:56,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-10-14 07:30:56,714 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-10-14 07:30:56,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 07:30:56,715 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-10-14 07:30:56,715 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 07:30:56,715 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-10-14 07:30:56,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-14 07:30:56,717 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 07:30:56,718 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 07:30:56,718 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 07:30:56,718 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 07:30:56,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 07:30:56,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-10-14 07:30:56,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 07:30:56,720 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [673666765] [2020-10-14 07:30:56,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 07:30:56,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 07:30:56,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:30:56,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:30:56,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 07:30:56,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-14 07:30:56,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 07:30:56,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 137 [2020-10-14 07:30:56,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 07:30:56,870 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 07:30:56,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 07:30:56,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 07:30:56,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 07:30:56,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 07:30:56,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 07:30:56,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 07:30:56,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:30:56,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 07:30:56,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 07:30:56,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 07:30:56,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 07:30:56,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 07:30:56,895 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 07:30:56,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 07:30:56,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 07:30:56,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 07:30:56,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 07:30:56,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-14 07:30:56,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 07:30:56,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:30:56,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 07:30:56,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-14 07:30:56,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 07:30:56,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-10-14 07:30:56,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 07:30:56,965 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 07:30:56,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 07:30:56,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 07:30:56,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 07:30:56,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 07:30:56,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 07:30:56,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [673666765] [2020-10-14 07:30:56,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 07:30:56,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 07:30:56,986 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639301281] [2020-10-14 07:30:56,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 07:30:56,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 07:30:56,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 07:30:56,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 07:30:56,989 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-10-14 07:30:57,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 07:30:57,056 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-10-14 07:30:57,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 07:30:57,057 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-10-14 07:30:57,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 07:30:57,059 INFO L225 Difference]: With dead ends: 36 [2020-10-14 07:30:57,059 INFO L226 Difference]: Without dead ends: 32 [2020-10-14 07:30:57,060 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 07:30:57,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-14 07:30:57,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-10-14 07:30:57,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-14 07:30:57,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-10-14 07:30:57,071 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-10-14 07:30:57,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 07:30:57,071 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-10-14 07:30:57,071 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 07:30:57,072 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-10-14 07:30:57,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 07:30:57,073 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 07:30:57,074 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 07:30:57,074 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 07:30:57,074 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 07:30:57,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 07:30:57,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-10-14 07:30:57,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 07:30:57,075 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1857042618] [2020-10-14 07:30:57,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 07:30:57,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 07:30:57,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:30:57,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:30:57,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 07:30:57,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-14 07:30:57,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 07:30:57,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 249 [2020-10-14 07:30:57,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 07:30:57,338 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 07:30:57,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 07:30:57,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 07:30:57,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 07:30:57,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 07:30:57,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 07:30:57,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 07:30:57,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:30:57,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 07:30:57,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 07:30:57,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 07:30:57,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 07:30:57,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 07:30:57,361 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 07:30:57,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 07:30:57,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 07:30:57,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 07:30:57,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 07:30:57,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-14 07:30:57,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 07:30:57,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:30:57,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:30:57,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 07:30:57,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-14 07:30:57,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 07:30:57,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 90 [2020-10-14 07:30:57,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 07:30:57,461 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 07:30:57,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 07:30:57,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 07:30:57,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-14 07:30:57,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 07:30:57,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-14 07:30:57,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 07:30:57,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:30:57,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 07:30:57,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 07:30:57,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 07:30:57,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-14 07:30:57,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 07:30:57,502 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 07:30:57,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 07:30:57,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 07:30:57,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 07:30:57,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 07:30:57,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-14 07:30:57,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 07:30:57,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:30:57,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 07:30:57,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 07:30:57,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 07:30:57,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 07:30:57,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 07:30:57,532 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 07:30:57,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 07:30:57,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 07:30:57,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 07:30:57,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 07:30:57,538 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 07:30:57,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1857042618] [2020-10-14 07:30:57,539 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 07:30:57,539 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 07:30:57,540 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662275531] [2020-10-14 07:30:57,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 07:30:57,541 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 07:30:57,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 07:30:57,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-14 07:30:57,542 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 7 states. [2020-10-14 07:30:57,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 07:30:57,696 INFO L93 Difference]: Finished difference Result 48 states and 66 transitions. [2020-10-14 07:30:57,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 07:30:57,696 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-10-14 07:30:57,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 07:30:57,700 INFO L225 Difference]: With dead ends: 48 [2020-10-14 07:30:57,700 INFO L226 Difference]: Without dead ends: 44 [2020-10-14 07:30:57,701 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-14 07:30:57,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-14 07:30:57,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-10-14 07:30:57,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-14 07:30:57,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 57 transitions. [2020-10-14 07:30:57,715 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 57 transitions. Word has length 26 [2020-10-14 07:30:57,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 07:30:57,715 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 57 transitions. [2020-10-14 07:30:57,715 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 07:30:57,715 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 57 transitions. [2020-10-14 07:30:57,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-14 07:30:57,717 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 07:30:57,718 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 07:30:57,718 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 07:30:57,718 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 07:30:57,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 07:30:57,719 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-10-14 07:30:57,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 07:30:57,719 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [776861264] [2020-10-14 07:30:57,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 07:30:57,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 07:30:57,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:30:57,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 07:30:57,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-14 07:30:57,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 07:30:57,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-10-14 07:30:57,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 07:30:57,781 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 07:30:57,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 07:30:57,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-14 07:30:57,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 07:30:57,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 07:30:57,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 07:30:57,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 07:30:57,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:30:57,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 07:30:57,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 07:30:57,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 07:30:57,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 07:30:57,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 07:30:57,821 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 07:30:57,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 07:30:57,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 07:30:57,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 07:30:57,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 07:30:57,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-14 07:30:57,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 07:30:57,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:30:57,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 07:30:57,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-14 07:30:57,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 07:30:57,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-14 07:30:57,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 07:30:57,868 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 07:30:57,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 07:30:57,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 07:30:57,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-14 07:30:57,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 07:30:57,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-14 07:30:57,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 07:30:57,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:30:57,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 07:30:57,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-14 07:30:57,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 07:30:57,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-14 07:30:57,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 07:30:57,928 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 07:30:57,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 07:30:57,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 07:30:57,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 07:30:57,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 07:30:57,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-14 07:30:57,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 07:30:57,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:30:57,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 07:30:57,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 07:30:57,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 07:30:57,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-14 07:30:57,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 07:30:57,963 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 07:30:57,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 07:30:57,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 07:30:57,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 07:30:57,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 07:30:57,982 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 07:30:57,982 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [776861264] [2020-10-14 07:30:57,983 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 07:30:57,983 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 07:30:57,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769415675] [2020-10-14 07:30:57,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 07:30:57,984 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 07:30:57,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 07:30:57,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-14 07:30:57,985 INFO L87 Difference]: Start difference. First operand 42 states and 57 transitions. Second operand 9 states. [2020-10-14 07:30:58,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 07:30:58,067 INFO L93 Difference]: Finished difference Result 60 states and 85 transitions. [2020-10-14 07:30:58,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 07:30:58,068 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-10-14 07:30:58,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 07:30:58,071 INFO L225 Difference]: With dead ends: 60 [2020-10-14 07:30:58,071 INFO L226 Difference]: Without dead ends: 56 [2020-10-14 07:30:58,072 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-14 07:30:58,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-14 07:30:58,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 48. [2020-10-14 07:30:58,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-14 07:30:58,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 67 transitions. [2020-10-14 07:30:58,087 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 67 transitions. Word has length 27 [2020-10-14 07:30:58,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 07:30:58,087 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 67 transitions. [2020-10-14 07:30:58,088 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 07:30:58,088 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 67 transitions. [2020-10-14 07:30:58,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 07:30:58,090 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 07:30:58,090 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 07:30:58,090 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 07:30:58,091 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 07:30:58,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 07:30:58,091 INFO L82 PathProgramCache]: Analyzing trace with hash -1725129826, now seen corresponding path program 1 times [2020-10-14 07:30:58,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 07:30:58,092 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1559494031] [2020-10-14 07:30:58,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 07:30:58,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 07:30:58,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:30:58,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:30:58,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:30:58,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:30:58,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 07:30:58,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-14 07:30:58,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 07:30:58,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 270 [2020-10-14 07:30:58,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 07:30:58,372 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 07:30:58,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 07:30:58,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 07:30:58,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 07:30:58,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 07:30:58,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 07:30:58,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 07:30:58,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:30:58,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 07:30:58,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 07:30:58,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 07:30:58,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 07:30:58,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 07:30:58,389 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 07:30:58,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 07:30:58,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 07:30:58,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 07:30:58,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 07:30:58,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-14 07:30:58,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 07:30:58,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:30:58,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:30:58,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:30:58,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:30:58,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 07:30:58,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 07:30:58,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 07:30:58,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 102 [2020-10-14 07:30:58,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 07:30:58,500 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 07:30:58,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 07:30:58,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 07:30:58,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-14 07:30:58,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 07:30:58,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-14 07:30:58,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 07:30:58,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:30:58,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 07:30:58,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-14 07:30:58,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 07:30:58,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 07:30:58,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 07:30:58,525 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 07:30:58,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 07:30:58,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 07:30:58,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 07:30:58,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 07:30:58,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-14 07:30:58,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 07:30:58,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:30:58,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:30:58,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 07:30:58,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-14 07:30:58,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 07:30:58,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-14 07:30:58,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 07:30:58,553 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 07:30:58,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 07:30:58,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 07:30:58,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 07:30:58,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 07:30:58,576 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 07:30:58,576 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1559494031] [2020-10-14 07:30:58,577 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 07:30:58,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-14 07:30:58,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401053383] [2020-10-14 07:30:58,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 07:30:58,578 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 07:30:58,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 07:30:58,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-14 07:30:58,579 INFO L87 Difference]: Start difference. First operand 48 states and 67 transitions. Second operand 7 states. [2020-10-14 07:30:58,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 07:30:58,687 INFO L93 Difference]: Finished difference Result 58 states and 83 transitions. [2020-10-14 07:30:58,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 07:30:58,688 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-10-14 07:30:58,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 07:30:58,689 INFO L225 Difference]: With dead ends: 58 [2020-10-14 07:30:58,690 INFO L226 Difference]: Without dead ends: 54 [2020-10-14 07:30:58,691 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-14 07:30:58,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-14 07:30:58,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2020-10-14 07:30:58,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-14 07:30:58,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 67 transitions. [2020-10-14 07:30:58,702 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 67 transitions. Word has length 28 [2020-10-14 07:30:58,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 07:30:58,703 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 67 transitions. [2020-10-14 07:30:58,703 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 07:30:58,703 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 67 transitions. [2020-10-14 07:30:58,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-14 07:30:58,705 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 07:30:58,706 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 07:30:58,706 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 07:30:58,706 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 07:30:58,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 07:30:58,707 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-10-14 07:30:58,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 07:30:58,707 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [490319039] [2020-10-14 07:30:58,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 07:30:58,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 07:30:58,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:30:58,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:30:58,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:30:58,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:30:58,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:31:00,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 07:31:00,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-14 07:31:00,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 07:31:00,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1492 [2020-10-14 07:31:00,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 07:31:00,208 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 07:31:00,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 07:31:00,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-14 07:31:00,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-14 07:31:00,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 07:31:00,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 07:31:00,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 07:31:00,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:31:00,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 07:31:00,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 07:31:00,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 07:31:00,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 07:31:00,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 07:31:00,223 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 07:31:00,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 07:31:00,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 07:31:00,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 07:31:00,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 07:31:00,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-14 07:31:00,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 07:31:00,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:31:00,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:31:00,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:31:00,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:31:00,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 07:31:00,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-14 07:31:00,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 07:31:00,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 353 [2020-10-14 07:31:00,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 07:31:00,589 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 07:31:00,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 07:31:00,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 07:31:00,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-14 07:31:00,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 07:31:00,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-14 07:31:00,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 07:31:00,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:31:00,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:31:00,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 07:31:00,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-14 07:31:00,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 07:31:00,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-14 07:31:00,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 07:31:00,642 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 07:31:00,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 07:31:00,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 07:31:00,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 07:31:00,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 07:31:00,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-14 07:31:00,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 07:31:00,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:31:00,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 07:31:00,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 07:31:00,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 07:31:00,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 07:31:00,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 07:31:00,695 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 07:31:00,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 07:31:00,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 07:31:00,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 07:31:00,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 07:31:00,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-14 07:31:00,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 07:31:00,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:31:00,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 07:31:00,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 07:31:00,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 07:31:00,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 07:31:00,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 07:31:00,703 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 07:31:00,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 07:31:00,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 07:31:00,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 07:31:00,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 07:31:00,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-14 07:31:00,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 07:31:00,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 07:31:00,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 07:31:00,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 07:31:00,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 07:31:00,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 07:31:00,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 07:31:00,714 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 07:31:00,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 07:31:00,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 07:31:00,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 07:31:00,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 07:31:00,737 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-14 07:31:00,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [490319039] [2020-10-14 07:31:00,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 07:31:00,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 07:31:00,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598017333] [2020-10-14 07:31:00,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 07:31:00,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 07:31:00,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 07:31:00,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-14 07:31:00,740 INFO L87 Difference]: Start difference. First operand 48 states and 67 transitions. Second operand 8 states. [2020-10-14 07:31:00,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 07:31:00,907 INFO L93 Difference]: Finished difference Result 88 states and 138 transitions. [2020-10-14 07:31:00,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 07:31:00,907 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 39 [2020-10-14 07:31:00,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 07:31:00,908 INFO L225 Difference]: With dead ends: 88 [2020-10-14 07:31:00,908 INFO L226 Difference]: Without dead ends: 0 [2020-10-14 07:31:00,910 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-10-14 07:31:00,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-14 07:31:00,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-14 07:31:00,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-14 07:31:00,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-14 07:31:00,911 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 39 [2020-10-14 07:31:00,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 07:31:00,912 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-14 07:31:00,912 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 07:31:00,912 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-14 07:31:00,912 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-14 07:31:00,912 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 07:31:00,915 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-14 07:31:01,096 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-10-14 07:31:01,096 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-14 07:31:01,097 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-14 07:31:01,097 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-14 07:31:01,097 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-14 07:31:01,097 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-14 07:31:01,097 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2020-10-14 07:31:01,097 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 35 42) the Hoare annotation is: true [2020-10-14 07:31:01,098 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 35 42) no Hoare annotation was computed. [2020-10-14 07:31:01,098 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 35 42) no Hoare annotation was computed. [2020-10-14 07:31:01,098 INFO L268 CegarLoopResult]: For program point L39(line 39) no Hoare annotation was computed. [2020-10-14 07:31:01,098 INFO L268 CegarLoopResult]: For program point L38(lines 38 40) no Hoare annotation was computed. [2020-10-14 07:31:01,098 INFO L264 CegarLoopResult]: At program point L37(line 37) the Hoare annotation is: (= main_~x~0 2) [2020-10-14 07:31:01,099 INFO L268 CegarLoopResult]: For program point L37-1(line 37) no Hoare annotation was computed. [2020-10-14 07:31:01,099 INFO L268 CegarLoopResult]: For program point L38-2(lines 38 40) no Hoare annotation was computed. [2020-10-14 07:31:01,099 INFO L271 CegarLoopResult]: At program point fibo2ENTRY(lines 17 25) the Hoare annotation is: true [2020-10-14 07:31:01,099 INFO L264 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (<= 2 |fibo2_#in~n|)) [2020-10-14 07:31:01,099 INFO L268 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-10-14 07:31:01,099 INFO L264 CegarLoopResult]: At program point L23-2(line 23) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (<= 2 |fibo2_#in~n|)) [2020-10-14 07:31:01,100 INFO L268 CegarLoopResult]: For program point L20(lines 20 24) no Hoare annotation was computed. [2020-10-14 07:31:01,100 INFO L268 CegarLoopResult]: For program point L23-3(line 23) no Hoare annotation was computed. [2020-10-14 07:31:01,100 INFO L268 CegarLoopResult]: For program point L18(lines 18 24) no Hoare annotation was computed. [2020-10-14 07:31:01,100 INFO L268 CegarLoopResult]: For program point fibo2FINAL(lines 17 25) no Hoare annotation was computed. [2020-10-14 07:31:01,100 INFO L268 CegarLoopResult]: For program point fibo2EXIT(lines 17 25) no Hoare annotation was computed. [2020-10-14 07:31:01,100 INFO L271 CegarLoopResult]: At program point fibo1ENTRY(lines 7 15) the Hoare annotation is: true [2020-10-14 07:31:01,101 INFO L264 CegarLoopResult]: At program point L13(line 13) the Hoare annotation is: (= fibo1_~n |fibo1_#in~n|) [2020-10-14 07:31:01,101 INFO L268 CegarLoopResult]: For program point L13-1(line 13) no Hoare annotation was computed. [2020-10-14 07:31:01,101 INFO L264 CegarLoopResult]: At program point L13-2(line 13) the Hoare annotation is: (let ((.cse0 (= fibo1_~n |fibo1_#in~n|))) (or (and (<= 3 fibo1_~n) .cse0) (and (<= |fibo1_#t~ret0| 1) (<= 1 |fibo1_#t~ret0|) .cse0) (and (<= |fibo1_#in~n| 1) .cse0))) [2020-10-14 07:31:01,101 INFO L268 CegarLoopResult]: For program point fibo1FINAL(lines 7 15) no Hoare annotation was computed. [2020-10-14 07:31:01,101 INFO L268 CegarLoopResult]: For program point L10(lines 10 14) no Hoare annotation was computed. [2020-10-14 07:31:01,101 INFO L268 CegarLoopResult]: For program point L13-3(line 13) no Hoare annotation was computed. [2020-10-14 07:31:01,102 INFO L268 CegarLoopResult]: For program point L8(lines 8 14) no Hoare annotation was computed. [2020-10-14 07:31:01,102 INFO L268 CegarLoopResult]: For program point fibo1EXIT(lines 7 15) no Hoare annotation was computed. [2020-10-14 07:31:01,109 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.10 07:31:01 BoogieIcfgContainer [2020-10-14 07:31:01,109 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-14 07:31:01,112 INFO L168 Benchmark]: Toolchain (without parser) took 5696.81 ms. Allocated memory was 147.8 MB in the beginning and 274.7 MB in the end (delta: 126.9 MB). Free memory was 104.3 MB in the beginning and 119.3 MB in the end (delta: -15.0 MB). Peak memory consumption was 111.9 MB. Max. memory is 7.1 GB. [2020-10-14 07:31:01,113 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 147.8 MB. Free memory was 122.4 MB in the beginning and 122.0 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. [2020-10-14 07:31:01,114 INFO L168 Benchmark]: CACSL2BoogieTranslator took 251.32 ms. Allocated memory is still 147.8 MB. Free memory was 103.9 MB in the beginning and 94.4 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-10-14 07:31:01,115 INFO L168 Benchmark]: Boogie Preprocessor took 115.37 ms. Allocated memory was 147.8 MB in the beginning and 202.9 MB in the end (delta: 55.1 MB). Free memory was 94.4 MB in the beginning and 181.7 MB in the end (delta: -87.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-10-14 07:31:01,115 INFO L168 Benchmark]: RCFGBuilder took 258.82 ms. Allocated memory is still 202.9 MB. Free memory was 181.7 MB in the beginning and 168.3 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. [2020-10-14 07:31:01,116 INFO L168 Benchmark]: TraceAbstraction took 5066.46 ms. Allocated memory was 202.9 MB in the beginning and 274.7 MB in the end (delta: 71.8 MB). Free memory was 167.3 MB in the beginning and 119.3 MB in the end (delta: 48.0 MB). Peak memory consumption was 119.9 MB. Max. memory is 7.1 GB. [2020-10-14 07:31:01,120 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 147.8 MB. Free memory was 122.4 MB in the beginning and 122.0 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 251.32 ms. Allocated memory is still 147.8 MB. Free memory was 103.9 MB in the beginning and 94.4 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 115.37 ms. Allocated memory was 147.8 MB in the beginning and 202.9 MB in the end (delta: 55.1 MB). Free memory was 94.4 MB in the beginning and 181.7 MB in the end (delta: -87.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 258.82 ms. Allocated memory is still 202.9 MB. Free memory was 181.7 MB in the beginning and 168.3 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5066.46 ms. Allocated memory was 202.9 MB in the beginning and 274.7 MB in the end (delta: 71.8 MB). Free memory was 167.3 MB in the beginning and 119.3 MB in the end (delta: 48.0 MB). Peak memory consumption was 119.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 39]: 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.7s, OverallIterations: 6, TraceHistogramMax: 3, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 178 SDtfs, 92 SDslu, 679 SDs, 0 SdLazy, 377 SolverSat, 25 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 91 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=48occurred in iteration=4, 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, 6 MinimizatonAttempts, 18 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 56 PreInvPairs, 76 NumberOfFragments, 51 HoareAnnotationTreeSize, 56 FomulaSimplifications, 13 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 11 FomulaSimplificationsInter, 136 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 3.6s InterpolantComputationTime, 147 NumberOfCodeBlocks, 147 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 141 ConstructedInterpolants, 0 QuantifiedInterpolants, 8371 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 3 PerfectInterpolantSequences, 21/29 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...