/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_2-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 18:12:49,379 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 18:12:49,386 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 18:12:49,433 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 18:12:49,434 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 18:12:49,443 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 18:12:49,444 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 18:12:49,447 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 18:12:49,452 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 18:12:49,453 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 18:12:49,456 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 18:12:49,458 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 18:12:49,458 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 18:12:49,462 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 18:12:49,463 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 18:12:49,466 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 18:12:49,467 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 18:12:49,468 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 18:12:49,470 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 18:12:49,473 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 18:12:49,478 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 18:12:49,479 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 18:12:49,480 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 18:12:49,481 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 18:12:49,487 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 18:12:49,487 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 18:12:49,488 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 18:12:49,491 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 18:12:49,491 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 18:12:49,494 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 18:12:49,494 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 18:12:49,495 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 18:12:49,496 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 18:12:49,496 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 18:12:49,498 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 18:12:49,498 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 18:12:49,499 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 18:12:49,499 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 18:12:49,499 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 18:12:49,500 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 18:12:49,501 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 18:12:49,502 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-24 18:12:49,552 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 18:12:49,553 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 18:12:49,554 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 18:12:49,554 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 18:12:49,555 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 18:12:49,555 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 18:12:49,555 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 18:12:49,555 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 18:12:49,556 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 18:12:49,556 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 18:12:49,557 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 18:12:49,557 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 18:12:49,557 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 18:12:49,558 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 18:12:49,558 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 18:12:49,558 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 18:12:49,558 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 18:12:49,559 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 18:12:49,559 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 18:12:49,559 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 18:12:49,559 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 18:12:49,559 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 18:12:49,560 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 18:12:49,560 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 18:12:49,560 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 18:12:49,560 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 18:12:49,561 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 18:12:49,561 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 18:12:49,561 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 18:12:49,561 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-09-24 18:12:49,987 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 18:12:50,011 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 18:12:50,015 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 18:12:50,018 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 18:12:50,018 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 18:12:50,019 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_2-1.c [2020-09-24 18:12:50,095 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7f39b7307/0bcf06fd2f3441cc9219f95bcd6776a5/FLAG162240fd9 [2020-09-24 18:12:50,596 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 18:12:50,597 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/fibo_2calls_2-1.c [2020-09-24 18:12:50,605 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7f39b7307/0bcf06fd2f3441cc9219f95bcd6776a5/FLAG162240fd9 [2020-09-24 18:12:50,925 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7f39b7307/0bcf06fd2f3441cc9219f95bcd6776a5 [2020-09-24 18:12:50,938 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 18:12:50,944 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 18:12:50,945 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 18:12:50,946 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 18:12:50,950 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 18:12:50,951 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 06:12:50" (1/1) ... [2020-09-24 18:12:50,955 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68e64c0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:12:50, skipping insertion in model container [2020-09-24 18:12:50,955 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 06:12:50" (1/1) ... [2020-09-24 18:12:50,964 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 18:12:50,991 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 18:12:51,195 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 18:12:51,203 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 18:12:51,222 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 18:12:51,237 INFO L208 MainTranslator]: Completed translation [2020-09-24 18:12:51,237 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:12:51 WrapperNode [2020-09-24 18:12:51,238 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 18:12:51,238 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 18:12:51,239 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 18:12:51,239 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 18:12:51,252 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:12:51" (1/1) ... [2020-09-24 18:12:51,252 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:12:51" (1/1) ... [2020-09-24 18:12:51,340 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:12:51" (1/1) ... [2020-09-24 18:12:51,341 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:12:51" (1/1) ... [2020-09-24 18:12:51,346 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:12:51" (1/1) ... [2020-09-24 18:12:51,350 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:12:51" (1/1) ... [2020-09-24 18:12:51,354 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:12:51" (1/1) ... [2020-09-24 18:12:51,359 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 18:12:51,359 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 18:12:51,359 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 18:12:51,359 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 18:12:51,360 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:12:51" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 18:12:51,429 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 18:12:51,429 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 18:12:51,430 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-09-24 18:12:51,430 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-09-24 18:12:51,430 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 18:12:51,430 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 18:12:51,430 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 18:12:51,430 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-09-24 18:12:51,430 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-09-24 18:12:51,430 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 18:12:51,431 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 18:12:51,431 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 18:12:51,697 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 18:12:51,697 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-24 18:12:51,702 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 06:12:51 BoogieIcfgContainer [2020-09-24 18:12:51,702 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 18:12:51,715 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 18:12:51,715 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 18:12:51,719 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 18:12:51,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 06:12:50" (1/3) ... [2020-09-24 18:12:51,723 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@566da70a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 06:12:51, skipping insertion in model container [2020-09-24 18:12:51,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:12:51" (2/3) ... [2020-09-24 18:12:51,724 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@566da70a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 06:12:51, skipping insertion in model container [2020-09-24 18:12:51,724 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 06:12:51" (3/3) ... [2020-09-24 18:12:51,732 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_2-1.c [2020-09-24 18:12:51,749 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 18:12:51,759 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 18:12:51,780 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 18:12:51,810 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 18:12:51,810 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 18:12:51,810 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 18:12:51,811 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 18:12:51,811 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 18:12:51,811 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 18:12:51,811 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 18:12:51,811 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 18:12:51,832 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2020-09-24 18:12:51,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-24 18:12:51,839 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:12:51,840 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:12:51,840 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:12:51,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:12:51,846 INFO L82 PathProgramCache]: Analyzing trace with hash -1089710179, now seen corresponding path program 1 times [2020-09-24 18:12:51,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:12:51,856 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1160288658] [2020-09-24 18:12:51,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:12:51,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:12:51,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:12:52,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:12:52,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:12:52,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 18:12:52,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 18:12:52,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 225 [2020-09-24 18:12:52,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:12:52,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:12:52,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-24 18:12:52,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 18:12:52,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 18:12:52,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:12:52,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:12:52,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:12:52,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:12:52,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 18:12:52,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:12:52,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 18:12:52,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:12:52,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:12:52,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:12:52,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:12:52,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:12:52,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 18:12:52,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:12:52,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:12:52,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:12:52,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 18:12:52,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:12:52,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-24 18:12:52,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:12:52,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 18:12:52,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:12:52,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 18:12:52,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:12:52,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:12:52,310 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1160288658] [2020-09-24 18:12:52,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 18:12:52,313 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 18:12:52,314 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212451565] [2020-09-24 18:12:52,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 18:12:52,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:12:52,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 18:12:52,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 18:12:52,341 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 5 states. [2020-09-24 18:12:52,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:12:52,436 INFO L93 Difference]: Finished difference Result 58 states and 67 transitions. [2020-09-24 18:12:52,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 18:12:52,439 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-09-24 18:12:52,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:12:52,451 INFO L225 Difference]: With dead ends: 58 [2020-09-24 18:12:52,451 INFO L226 Difference]: Without dead ends: 42 [2020-09-24 18:12:52,455 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-24 18:12:52,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-24 18:12:52,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-09-24 18:12:52,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-24 18:12:52,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2020-09-24 18:12:52,519 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 16 [2020-09-24 18:12:52,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:12:52,521 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2020-09-24 18:12:52,521 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 18:12:52,521 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2020-09-24 18:12:52,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-24 18:12:52,525 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:12:52,525 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:12:52,526 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 18:12:52,526 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:12:52,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:12:52,526 INFO L82 PathProgramCache]: Analyzing trace with hash -653728005, now seen corresponding path program 1 times [2020-09-24 18:12:52,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:12:52,528 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [220911941] [2020-09-24 18:12:52,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:12:52,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:12:52,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:12:52,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:12:52,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-24 18:12:52,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:12:52,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 81 [2020-09-24 18:12:52,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:12:52,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:12:52,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 18:12:52,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 18:12:52,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:12:52,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:12:52,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:12:52,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:12:52,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:12:52,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 18:12:52,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:12:52,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 18:12:52,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:12:52,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:12:52,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:12:52,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:12:52,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:12:52,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 18:12:52,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:12:52,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:12:52,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:12:52,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 18:12:52,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:12:52,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-09-24 18:12:52,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:12:52,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:12:52,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-24 18:12:52,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 18:12:52,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:12:52,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:12:52,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [220911941] [2020-09-24 18:12:52,714 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 18:12:52,714 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 18:12:52,714 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208486786] [2020-09-24 18:12:52,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 18:12:52,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:12:52,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 18:12:52,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 18:12:52,717 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand 5 states. [2020-09-24 18:12:52,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:12:52,819 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2020-09-24 18:12:52,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 18:12:52,821 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-09-24 18:12:52,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:12:52,823 INFO L225 Difference]: With dead ends: 50 [2020-09-24 18:12:52,823 INFO L226 Difference]: Without dead ends: 44 [2020-09-24 18:12:52,824 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 [2020-09-24 18:12:52,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-24 18:12:52,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-09-24 18:12:52,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-24 18:12:52,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2020-09-24 18:12:52,834 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 17 [2020-09-24 18:12:52,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:12:52,835 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2020-09-24 18:12:52,835 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 18:12:52,835 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2020-09-24 18:12:52,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-24 18:12:52,837 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:12:52,837 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, 1, 1, 1, 1, 1] [2020-09-24 18:12:52,838 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 18:12:52,838 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:12:52,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:12:52,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1617834856, now seen corresponding path program 1 times [2020-09-24 18:12:52,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:12:52,839 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2046826292] [2020-09-24 18:12:52,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:12:52,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:12:52,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:12:52,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:12:53,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:12:53,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:12:53,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-24 18:12:53,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 18:12:53,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 826 [2020-09-24 18:12:53,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:12:53,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 18:12:53,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 18:12:53,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 18:12:53,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:12:53,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:12:53,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:12:53,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:12:53,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:12:53,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 18:12:53,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:12:53,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 18:12:53,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:12:53,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:12:53,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:12:53,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:12:53,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:12:53,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 18:12:53,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:12:53,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:12:53,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:12:53,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-09-24 18:12:53,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:12:53,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-09-24 18:12:53,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:12:53,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 18:12:53,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 18:12:53,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 18:12:53,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:12:53,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 18:12:53,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:12:53,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:12:53,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:12:53,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 18:12:53,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:12:53,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 18:12:53,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:12:53,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:12:53,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-24 18:12:53,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 18:12:53,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:12:53,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-24 18:12:53,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:12:53,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:12:53,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:12:53,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 18:12:53,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:12:53,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 18:12:53,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:12:53,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:12:53,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-24 18:12:53,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:12:53,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:12:53,820 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 18:12:53,820 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2046826292] [2020-09-24 18:12:53,820 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:12:53,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-24 18:12:53,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243543639] [2020-09-24 18:12:53,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 18:12:53,822 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:12:53,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 18:12:53,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-24 18:12:53,823 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand 6 states. [2020-09-24 18:12:53,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:12:53,893 INFO L93 Difference]: Finished difference Result 82 states and 102 transitions. [2020-09-24 18:12:53,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 18:12:53,893 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-09-24 18:12:53,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:12:53,895 INFO L225 Difference]: With dead ends: 82 [2020-09-24 18:12:53,895 INFO L226 Difference]: Without dead ends: 46 [2020-09-24 18:12:53,897 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-24 18:12:53,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-09-24 18:12:53,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2020-09-24 18:12:53,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-24 18:12:53,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2020-09-24 18:12:53,907 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 33 [2020-09-24 18:12:53,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:12:53,907 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2020-09-24 18:12:53,907 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 18:12:53,907 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2020-09-24 18:12:53,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-24 18:12:53,910 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:12:53,910 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:12:53,910 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 18:12:53,910 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:12:53,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:12:53,911 INFO L82 PathProgramCache]: Analyzing trace with hash 887160861, now seen corresponding path program 1 times [2020-09-24 18:12:53,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:12:53,912 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [160468591] [2020-09-24 18:12:53,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:12:53,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-24 18:12:53,924 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-24 18:12:53,924 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 18:12:53,931 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 18:12:53,957 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 06:12:53 BoogieIcfgContainer [2020-09-24 18:12:53,957 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 18:12:53,962 INFO L168 Benchmark]: Toolchain (without parser) took 3019.60 ms. Allocated memory was 147.8 MB in the beginning and 233.3 MB in the end (delta: 85.5 MB). Free memory was 102.9 MB in the beginning and 134.4 MB in the end (delta: -31.5 MB). Peak memory consumption was 54.0 MB. Max. memory is 7.1 GB. [2020-09-24 18:12:53,963 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 147.8 MB. Free memory was 121.1 MB in the beginning and 120.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-24 18:12:53,965 INFO L168 Benchmark]: CACSL2BoogieTranslator took 292.77 ms. Allocated memory is still 147.8 MB. Free memory was 102.3 MB in the beginning and 92.7 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-09-24 18:12:53,967 INFO L168 Benchmark]: Boogie Preprocessor took 120.49 ms. Allocated memory was 147.8 MB in the beginning and 203.9 MB in the end (delta: 56.1 MB). Free memory was 92.7 MB in the beginning and 182.7 MB in the end (delta: -90.0 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-09-24 18:12:53,968 INFO L168 Benchmark]: RCFGBuilder took 343.35 ms. Allocated memory is still 203.9 MB. Free memory was 182.7 MB in the beginning and 168.2 MB in the end (delta: 14.4 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. [2020-09-24 18:12:53,974 INFO L168 Benchmark]: TraceAbstraction took 2242.67 ms. Allocated memory was 203.9 MB in the beginning and 233.3 MB in the end (delta: 29.4 MB). Free memory was 168.2 MB in the beginning and 134.4 MB in the end (delta: 33.8 MB). Peak memory consumption was 63.1 MB. Max. memory is 7.1 GB. [2020-09-24 18:12:53,985 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 121.1 MB in the beginning and 120.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 292.77 ms. Allocated memory is still 147.8 MB. Free memory was 102.3 MB in the beginning and 92.7 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 120.49 ms. Allocated memory was 147.8 MB in the beginning and 203.9 MB in the end (delta: 56.1 MB). Free memory was 92.7 MB in the beginning and 182.7 MB in the end (delta: -90.0 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 343.35 ms. Allocated memory is still 203.9 MB. Free memory was 182.7 MB in the beginning and 168.2 MB in the end (delta: 14.4 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2242.67 ms. Allocated memory was 203.9 MB in the beginning and 233.3 MB in the end (delta: 29.4 MB). Free memory was 168.2 MB in the beginning and 134.4 MB in the end (delta: 33.8 MB). Peak memory consumption was 63.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 39]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L36] int x = 2; [L37] CALL, EXPR fibo1(x) [L8] COND FALSE !(n < 1) [L10] COND FALSE !(n == 1) [L13] CALL, EXPR fibo2(n-1) [L18] COND FALSE !(n < 1) [L20] COND TRUE n == 1 [L21] return 1; [L13] RET, EXPR fibo2(n-1) [L13] CALL, EXPR fibo2(n-2) [L18] COND TRUE n < 1 [L19] return 0; [L13] RET, EXPR fibo2(n-2) [L13] return fibo2(n-1) + fibo2(n-2); [L37] RET, EXPR fibo1(x) [L37] int result = fibo1(x); [L38] COND TRUE result == 1 [L39] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 45 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.1s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 131 SDtfs, 48 SDslu, 323 SDs, 0 SdLazy, 91 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=45occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 100 NumberOfCodeBlocks, 100 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 63 ConstructedInterpolants, 0 QuantifiedInterpolants, 2321 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 2 PerfectInterpolantSequences, 1/5 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...