/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.5 --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 [2020-09-25 14:29:56,502 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 14:29:56,506 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 14:29:56,531 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 14:29:56,531 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 14:29:56,532 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 14:29:56,534 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 14:29:56,535 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 14:29:56,537 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 14:29:56,538 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 14:29:56,539 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 14:29:56,540 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 14:29:56,540 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 14:29:56,541 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 14:29:56,542 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 14:29:56,543 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 14:29:56,544 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 14:29:56,545 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 14:29:56,547 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 14:29:56,549 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 14:29:56,550 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 14:29:56,552 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 14:29:56,553 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 14:29:56,554 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 14:29:56,556 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 14:29:56,556 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 14:29:56,557 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 14:29:56,558 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 14:29:56,558 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 14:29:56,559 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 14:29:56,559 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 14:29:56,560 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 14:29:56,561 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 14:29:56,562 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 14:29:56,563 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 14:29:56,563 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 14:29:56,564 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 14:29:56,564 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 14:29:56,564 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 14:29:56,565 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 14:29:56,566 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 14:29:56,567 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-25 14:29:56,616 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 14:29:56,616 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 14:29:56,620 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 14:29:56,620 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 14:29:56,620 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 14:29:56,621 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 14:29:56,621 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 14:29:56,621 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 14:29:56,621 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 14:29:56,621 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 14:29:56,622 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 14:29:56,623 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 14:29:56,624 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 14:29:56,624 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 14:29:56,624 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 14:29:56,624 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 14:29:56,624 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 14:29:56,625 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 14:29:56,625 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 14:29:56,625 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 14:29:56,625 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 14:29:56,625 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 14:29:56,626 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 14:29:56,626 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 14:29:56,626 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 14:29:56,626 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 14:29:56,626 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 14:29:56,626 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 14:29:56,627 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 14:29:56,627 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=SMALLESTAMONGWIDE;tolerance=0.5;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=SMALLESTAMONGWIDE;tolerance=0.5;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=SMALLESTAMONGWIDE;tolerance=0.5;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=SMALLESTAMONGWIDE;tolerance=0.5;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=SMALLESTAMONGWIDE;tolerance=0.5;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=SMALLESTAMONGWIDE;tolerance=0.5;log-additional-information=true; [2020-09-25 14:29:57,107 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 14:29:57,124 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 14:29:57,128 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 14:29:57,130 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 14:29:57,131 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 14:29:57,133 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_2-1.c [2020-09-25 14:29:57,220 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a52b6a41e/5c026de053724f29b10c829d0ce19ebf/FLAG0b1204610 [2020-09-25 14:29:57,742 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 14:29:57,743 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/fibo_2calls_2-1.c [2020-09-25 14:29:57,752 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a52b6a41e/5c026de053724f29b10c829d0ce19ebf/FLAG0b1204610 [2020-09-25 14:29:58,088 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a52b6a41e/5c026de053724f29b10c829d0ce19ebf [2020-09-25 14:29:58,102 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 14:29:58,108 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 14:29:58,109 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 14:29:58,110 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 14:29:58,114 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 14:29:58,115 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:29:58" (1/1) ... [2020-09-25 14:29:58,119 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 25.09 02:29:58, skipping insertion in model container [2020-09-25 14:29:58,119 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:29:58" (1/1) ... [2020-09-25 14:29:58,128 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 14:29:58,156 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 14:29:58,362 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 14:29:58,368 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 14:29:58,389 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 14:29:58,406 INFO L208 MainTranslator]: Completed translation [2020-09-25 14:29:58,406 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:29:58 WrapperNode [2020-09-25 14:29:58,406 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 14:29:58,407 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 14:29:58,407 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 14:29:58,407 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 14:29:58,420 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:29:58" (1/1) ... [2020-09-25 14:29:58,421 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:29:58" (1/1) ... [2020-09-25 14:29:58,426 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:29:58" (1/1) ... [2020-09-25 14:29:58,427 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:29:58" (1/1) ... [2020-09-25 14:29:58,511 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:29:58" (1/1) ... [2020-09-25 14:29:58,514 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:29:58" (1/1) ... [2020-09-25 14:29:58,515 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:29:58" (1/1) ... [2020-09-25 14:29:58,517 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 14:29:58,517 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 14:29:58,518 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 14:29:58,518 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 14:29:58,519 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:29:58" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 14:29:58,594 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 14:29:58,594 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 14:29:58,594 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-09-25 14:29:58,594 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-09-25 14:29:58,595 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 14:29:58,596 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 14:29:58,596 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 14:29:58,598 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-09-25 14:29:58,598 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-09-25 14:29:58,598 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 14:29:58,598 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 14:29:58,599 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 14:29:58,853 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 14:29:58,854 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 14:29:58,859 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:29:58 BoogieIcfgContainer [2020-09-25 14:29:58,860 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 14:29:58,872 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 14:29:58,872 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 14:29:58,876 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 14:29:58,876 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 02:29:58" (1/3) ... [2020-09-25 14:29:58,887 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 25.09 02:29:58, skipping insertion in model container [2020-09-25 14:29:58,887 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:29:58" (2/3) ... [2020-09-25 14:29:58,888 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 25.09 02:29:58, skipping insertion in model container [2020-09-25 14:29:58,888 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:29:58" (3/3) ... [2020-09-25 14:29:58,894 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_2-1.c [2020-09-25 14:29:58,911 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 14:29:58,920 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 14:29:58,946 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 14:29:58,977 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 14:29:58,977 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 14:29:58,977 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 14:29:58,977 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 14:29:58,977 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 14:29:58,978 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 14:29:58,978 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 14:29:58,978 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 14:29:58,998 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2020-09-25 14:29:59,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-25 14:29:59,005 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:29:59,006 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 14:29:59,007 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:29:59,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:29:59,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1089710179, now seen corresponding path program 1 times [2020-09-25 14:29:59,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:29:59,022 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1160288658] [2020-09-25 14:29:59,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:29:59,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:29:59,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:29:59,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:29:59,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:29:59,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 14:29:59,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 14:29:59,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 196 [2020-09-25 14:29:59,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:29:59,330 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:29:59,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 14:29:59,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-25 14:29:59,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 14:29:59,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 14:29:59,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:29:59,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:29:59,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:29:59,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:29:59,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 14:29:59,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:29:59,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 14:29:59,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:29:59,416 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:29:59,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:29:59,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:29:59,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:29:59,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:29:59,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-25 14:29:59,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:29:59,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:29:59,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:29:59,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 14:29:59,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:29:59,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-25 14:29:59,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:29:59,439 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:29:59,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 14:29:59,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:29:59,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 14:29:59,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:29:59,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 14:29:59,461 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1160288658] [2020-09-25 14:29:59,463 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 14:29:59,463 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 14:29:59,465 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378075764] [2020-09-25 14:29:59,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 14:29:59,472 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:29:59,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 14:29:59,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 14:29:59,493 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 5 states. [2020-09-25 14:29:59,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:29:59,580 INFO L93 Difference]: Finished difference Result 58 states and 67 transitions. [2020-09-25 14:29:59,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 14:29:59,583 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-09-25 14:29:59,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:29:59,597 INFO L225 Difference]: With dead ends: 58 [2020-09-25 14:29:59,597 INFO L226 Difference]: Without dead ends: 42 [2020-09-25 14:29:59,602 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 [2020-09-25 14:29:59,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-25 14:29:59,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-09-25 14:29:59,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-25 14:29:59,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2020-09-25 14:29:59,663 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 16 [2020-09-25 14:29:59,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:29:59,664 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2020-09-25 14:29:59,664 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 14:29:59,664 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2020-09-25 14:29:59,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-25 14:29:59,667 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:29:59,667 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 14:29:59,667 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 14:29:59,668 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:29:59,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:29:59,668 INFO L82 PathProgramCache]: Analyzing trace with hash -653728005, now seen corresponding path program 1 times [2020-09-25 14:29:59,668 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:29:59,669 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [66142975] [2020-09-25 14:29:59,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:29:59,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:29:59,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:29:59,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:29:59,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-25 14:29:59,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:29:59,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 101 [2020-09-25 14:29:59,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:29:59,782 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:29:59,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 14:29:59,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 14:29:59,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 14:29:59,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:29:59,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:29:59,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:29:59,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:29:59,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:29:59,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 14:29:59,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:29:59,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 14:29:59,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:29:59,820 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:29:59,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:29:59,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:29:59,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:29:59,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 14:29:59,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-25 14:29:59,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:29:59,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:29:59,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:29:59,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 14:29:59,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:29:59,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-09-25 14:29:59,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:29:59,881 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:29:59,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 14:29:59,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-25 14:29:59,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 14:29:59,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:29:59,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 14:29:59,903 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [66142975] [2020-09-25 14:29:59,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 14:29:59,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 14:29:59,904 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092225811] [2020-09-25 14:29:59,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 14:29:59,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:29:59,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 14:29:59,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 14:29:59,907 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand 5 states. [2020-09-25 14:29:59,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:29:59,991 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2020-09-25 14:29:59,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 14:29:59,992 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-09-25 14:29:59,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:29:59,994 INFO L225 Difference]: With dead ends: 50 [2020-09-25 14:29:59,994 INFO L226 Difference]: Without dead ends: 44 [2020-09-25 14:29:59,995 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 [2020-09-25 14:29:59,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-25 14:30:00,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-09-25 14:30:00,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-25 14:30:00,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2020-09-25 14:30:00,009 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 17 [2020-09-25 14:30:00,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:30:00,010 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2020-09-25 14:30:00,010 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 14:30:00,010 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2020-09-25 14:30:00,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-25 14:30:00,012 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:30:00,012 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] [2020-09-25 14:30:00,013 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 14:30:00,013 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:30:00,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:30:00,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1617834856, now seen corresponding path program 1 times [2020-09-25 14:30:00,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:30:00,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [206757083] [2020-09-25 14:30:00,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:30:00,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:30:00,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:00,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:00,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:00,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:30:00,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-25 14:30:00,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 14:30:00,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 881 [2020-09-25 14:30:00,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:30:00,910 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:30:00,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 14:30:00,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 14:30:00,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-25 14:30:00,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:30:00,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:30:00,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:30:00,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:00,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:30:00,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 14:30:00,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:30:00,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 14:30:00,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:30:00,927 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:30:00,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:30:00,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:30:00,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:30:00,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:30:00,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-25 14:30:00,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:30:00,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:00,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:01,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:30:01,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-09-25 14:30:01,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 14:30:01,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 78 [2020-09-25 14:30:01,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:30:01,016 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:30:01,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 14:30:01,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-25 14:30:01,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-09-25 14:30:01,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:30:01,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-25 14:30:01,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:30:01,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:01,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:30:01,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 14:30:01,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:30:01,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 14:30:01,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:30:01,050 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:30:01,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 14:30:01,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:30:01,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 14:30:01,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:30:01,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-25 14:30:01,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:30:01,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:30:01,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:30:01,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 14:30:01,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:30:01,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 14:30:01,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:30:01,085 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:30:01,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 14:30:01,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:30:01,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 14:30:01,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:30:01,092 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 14:30:01,093 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [206757083] [2020-09-25 14:30:01,093 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 14:30:01,093 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 14:30:01,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457001701] [2020-09-25 14:30:01,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 14:30:01,094 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:30:01,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 14:30:01,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-25 14:30:01,095 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand 7 states. [2020-09-25 14:30:01,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:30:01,213 INFO L93 Difference]: Finished difference Result 58 states and 69 transitions. [2020-09-25 14:30:01,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-25 14:30:01,214 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 33 [2020-09-25 14:30:01,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:30:01,217 INFO L225 Difference]: With dead ends: 58 [2020-09-25 14:30:01,217 INFO L226 Difference]: Without dead ends: 52 [2020-09-25 14:30:01,218 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-25 14:30:01,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-09-25 14:30:01,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2020-09-25 14:30:01,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-25 14:30:01,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2020-09-25 14:30:01,229 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 33 [2020-09-25 14:30:01,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:30:01,230 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2020-09-25 14:30:01,230 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 14:30:01,230 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2020-09-25 14:30:01,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-25 14:30:01,232 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:30:01,232 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] [2020-09-25 14:30:01,233 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 14:30:01,233 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:30:01,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:30:01,233 INFO L82 PathProgramCache]: Analyzing trace with hash 887160861, now seen corresponding path program 1 times [2020-09-25 14:30:01,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:30:01,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [217582445] [2020-09-25 14:30:01,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:30:01,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 14:30:01,244 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 14:30:01,244 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 14:30:01,249 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 14:30:01,270 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 02:30:01 BoogieIcfgContainer [2020-09-25 14:30:01,270 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 14:30:01,274 INFO L168 Benchmark]: Toolchain (without parser) took 3168.64 ms. Allocated memory was 138.4 MB in the beginning and 231.2 MB in the end (delta: 92.8 MB). Free memory was 99.9 MB in the beginning and 122.2 MB in the end (delta: -22.3 MB). Peak memory consumption was 70.5 MB. Max. memory is 7.1 GB. [2020-09-25 14:30:01,275 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 138.4 MB. Free memory was 118.6 MB in the beginning and 118.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-25 14:30:01,276 INFO L168 Benchmark]: CACSL2BoogieTranslator took 297.40 ms. Allocated memory is still 138.4 MB. Free memory was 99.2 MB in the beginning and 89.6 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-09-25 14:30:01,277 INFO L168 Benchmark]: Boogie Preprocessor took 109.98 ms. Allocated memory was 138.4 MB in the beginning and 200.3 MB in the end (delta: 61.9 MB). Free memory was 89.6 MB in the beginning and 178.9 MB in the end (delta: -89.3 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. [2020-09-25 14:30:01,278 INFO L168 Benchmark]: RCFGBuilder took 342.63 ms. Allocated memory is still 200.3 MB. Free memory was 178.9 MB in the beginning and 164.6 MB in the end (delta: 14.4 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. [2020-09-25 14:30:01,279 INFO L168 Benchmark]: TraceAbstraction took 2398.69 ms. Allocated memory was 200.3 MB in the beginning and 231.2 MB in the end (delta: 30.9 MB). Free memory was 164.6 MB in the beginning and 122.2 MB in the end (delta: 42.4 MB). Peak memory consumption was 73.3 MB. Max. memory is 7.1 GB. [2020-09-25 14:30:01,282 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 138.4 MB. Free memory was 118.6 MB in the beginning and 118.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 297.40 ms. Allocated memory is still 138.4 MB. Free memory was 99.2 MB in the beginning and 89.6 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 109.98 ms. Allocated memory was 138.4 MB in the beginning and 200.3 MB in the end (delta: 61.9 MB). Free memory was 89.6 MB in the beginning and 178.9 MB in the end (delta: -89.3 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 342.63 ms. Allocated memory is still 200.3 MB. Free memory was 178.9 MB in the beginning and 164.6 MB in the end (delta: 14.4 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2398.69 ms. Allocated memory was 200.3 MB in the beginning and 231.2 MB in the end (delta: 30.9 MB). Free memory was 164.6 MB in the beginning and 122.2 MB in the end (delta: 42.4 MB). Peak memory consumption was 73.3 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: 2.2s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 121 SDtfs, 56 SDslu, 354 SDs, 0 SdLazy, 132 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=50occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 100 NumberOfCodeBlocks, 100 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 63 ConstructedInterpolants, 0 QuantifiedInterpolants, 2961 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...