/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=0.2 --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 11:07:07,432 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 11:07:07,436 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 11:07:07,462 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 11:07:07,463 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 11:07:07,464 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 11:07:07,466 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 11:07:07,468 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 11:07:07,470 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 11:07:07,471 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 11:07:07,472 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 11:07:07,474 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 11:07:07,474 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 11:07:07,475 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 11:07:07,477 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 11:07:07,478 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 11:07:07,479 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 11:07:07,480 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 11:07:07,482 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 11:07:07,484 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 11:07:07,486 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 11:07:07,487 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 11:07:07,488 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 11:07:07,489 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 11:07:07,492 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 11:07:07,493 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 11:07:07,493 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 11:07:07,494 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 11:07:07,495 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 11:07:07,496 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 11:07:07,496 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 11:07:07,497 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 11:07:07,498 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 11:07:07,499 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 11:07:07,500 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 11:07:07,500 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 11:07:07,501 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 11:07:07,502 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 11:07:07,502 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 11:07:07,503 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 11:07:07,504 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 11:07:07,505 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 11:07:07,533 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 11:07:07,533 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 11:07:07,535 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 11:07:07,535 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 11:07:07,535 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 11:07:07,536 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 11:07:07,536 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 11:07:07,536 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 11:07:07,536 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 11:07:07,536 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 11:07:07,537 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 11:07:07,537 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 11:07:07,537 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 11:07:07,537 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 11:07:07,538 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 11:07:07,538 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 11:07:07,538 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 11:07:07,538 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 11:07:07,538 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 11:07:07,539 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 11:07:07,539 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 11:07:07,539 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 11:07:07,539 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 11:07:07,540 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 11:07:07,540 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 11:07:07,540 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 11:07:07,540 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 11:07:07,541 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 11:07:07,541 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 11:07:07,541 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=0.2;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=0.2;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=0.2;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=0.2;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=0.2;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=0.2;log-additional-information=true; [2020-09-25 11:07:07,995 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 11:07:08,017 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 11:07:08,022 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 11:07:08,024 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 11:07:08,027 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 11:07:08,028 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_2-1.c [2020-09-25 11:07:08,117 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0dcd8a13a/481684dcd4214a05855ea26715e5d46c/FLAG62bc01ea0 [2020-09-25 11:07:08,661 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 11:07:08,662 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/fibo_2calls_2-1.c [2020-09-25 11:07:08,669 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0dcd8a13a/481684dcd4214a05855ea26715e5d46c/FLAG62bc01ea0 [2020-09-25 11:07:09,017 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0dcd8a13a/481684dcd4214a05855ea26715e5d46c [2020-09-25 11:07:09,030 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 11:07:09,035 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 11:07:09,036 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 11:07:09,037 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 11:07:09,042 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 11:07:09,043 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:07:09" (1/1) ... [2020-09-25 11:07:09,048 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4839a71c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:07:09, skipping insertion in model container [2020-09-25 11:07:09,049 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:07:09" (1/1) ... [2020-09-25 11:07:09,059 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 11:07:09,083 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 11:07:09,320 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 11:07:09,326 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 11:07:09,348 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 11:07:09,367 INFO L208 MainTranslator]: Completed translation [2020-09-25 11:07:09,368 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:07:09 WrapperNode [2020-09-25 11:07:09,368 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 11:07:09,369 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 11:07:09,369 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 11:07:09,369 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 11:07:09,389 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:07:09" (1/1) ... [2020-09-25 11:07:09,389 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:07:09" (1/1) ... [2020-09-25 11:07:09,532 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:07:09" (1/1) ... [2020-09-25 11:07:09,532 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:07:09" (1/1) ... [2020-09-25 11:07:09,538 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:07:09" (1/1) ... [2020-09-25 11:07:09,542 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:07:09" (1/1) ... [2020-09-25 11:07:09,547 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:07:09" (1/1) ... [2020-09-25 11:07:09,552 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 11:07:09,553 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 11:07:09,553 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 11:07:09,553 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 11:07:09,556 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:07:09" (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 11:07:09,654 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 11:07:09,655 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 11:07:09,655 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-09-25 11:07:09,655 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-09-25 11:07:09,655 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 11:07:09,656 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 11:07:09,656 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 11:07:09,656 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-09-25 11:07:09,656 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-09-25 11:07:09,656 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 11:07:09,657 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 11:07:09,657 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 11:07:09,898 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 11:07:09,898 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 11:07:09,904 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:07:09 BoogieIcfgContainer [2020-09-25 11:07:09,904 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 11:07:09,906 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 11:07:09,907 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 11:07:09,912 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 11:07:09,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 11:07:09" (1/3) ... [2020-09-25 11:07:09,913 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@764e7cd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:07:09, skipping insertion in model container [2020-09-25 11:07:09,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:07:09" (2/3) ... [2020-09-25 11:07:09,915 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@764e7cd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:07:09, skipping insertion in model container [2020-09-25 11:07:09,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:07:09" (3/3) ... [2020-09-25 11:07:09,918 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_2-1.c [2020-09-25 11:07:09,935 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 11:07:09,946 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 11:07:09,974 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 11:07:10,032 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 11:07:10,032 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 11:07:10,033 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 11:07:10,033 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 11:07:10,033 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 11:07:10,033 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 11:07:10,034 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 11:07:10,034 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 11:07:10,061 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2020-09-25 11:07:10,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-25 11:07:10,069 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:07:10,070 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:07:10,071 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:07:10,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:07:10,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1089710179, now seen corresponding path program 1 times [2020-09-25 11:07:10,090 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:07:10,091 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1392789619] [2020-09-25 11:07:10,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:07:10,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:07:10,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:07:10,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:07:10,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:07:10,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 11:07:10,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 11:07:10,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 266 [2020-09-25 11:07:10,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:07:10,484 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:07:10,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 11:07:10,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-25 11:07:10,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 11:07:10,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 11:07:10,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:07:10,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:07:10,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:07:10,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:07:10,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:07:10,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:07:10,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 11:07:10,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:07:10,568 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:07:10,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:07:10,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:07:10,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:07:10,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:07:10,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-25 11:07:10,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:07:10,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:07:10,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:07:10,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 11:07:10,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:07:10,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-25 11:07:10,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:07:10,594 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:07:10,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 11:07:10,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:07:10,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 11:07:10,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:07:10,616 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 11:07:10,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1392789619] [2020-09-25 11:07:10,619 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 11:07:10,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 11:07:10,621 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647395316] [2020-09-25 11:07:10,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 11:07:10,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:07:10,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 11:07:10,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 11:07:10,647 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 5 states. [2020-09-25 11:07:10,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:07:10,751 INFO L93 Difference]: Finished difference Result 58 states and 67 transitions. [2020-09-25 11:07:10,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 11:07:10,753 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-09-25 11:07:10,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:07:10,768 INFO L225 Difference]: With dead ends: 58 [2020-09-25 11:07:10,768 INFO L226 Difference]: Without dead ends: 42 [2020-09-25 11:07:10,773 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 11:07:10,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-25 11:07:10,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-09-25 11:07:10,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-25 11:07:10,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2020-09-25 11:07:10,832 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 16 [2020-09-25 11:07:10,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:07:10,833 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2020-09-25 11:07:10,833 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 11:07:10,833 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2020-09-25 11:07:10,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-25 11:07:10,836 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:07:10,836 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 11:07:10,837 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 11:07:10,837 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:07:10,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:07:10,837 INFO L82 PathProgramCache]: Analyzing trace with hash -653728005, now seen corresponding path program 1 times [2020-09-25 11:07:10,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:07:10,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [205228834] [2020-09-25 11:07:10,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:07:10,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:07:10,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:07:10,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:07:10,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-25 11:07:10,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:07:10,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 57 [2020-09-25 11:07:10,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:07:10,907 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:07:10,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 11:07:10,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 11:07:10,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 11:07:10,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:07:10,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:07:10,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:07:10,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:07:10,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:07:10,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:07:10,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:07:10,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 11:07:10,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:07:10,931 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:07:10,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:07:10,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:07:10,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:07:10,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:07:10,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-25 11:07:10,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:07:10,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:07:10,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:07:10,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 11:07:10,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:07:10,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-09-25 11:07:10,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:07:10,965 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:07:10,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 11:07:10,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-25 11:07:10,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 11:07:10,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:07:10,997 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 11:07:10,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [205228834] [2020-09-25 11:07:10,998 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 11:07:10,998 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 11:07:10,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178112632] [2020-09-25 11:07:11,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 11:07:11,000 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:07:11,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 11:07:11,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 11:07:11,001 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand 5 states. [2020-09-25 11:07:11,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:07:11,080 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2020-09-25 11:07:11,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 11:07:11,081 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-09-25 11:07:11,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:07:11,083 INFO L225 Difference]: With dead ends: 50 [2020-09-25 11:07:11,083 INFO L226 Difference]: Without dead ends: 44 [2020-09-25 11:07:11,085 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 11:07:11,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-25 11:07:11,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-09-25 11:07:11,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-25 11:07:11,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2020-09-25 11:07:11,096 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 17 [2020-09-25 11:07:11,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:07:11,096 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2020-09-25 11:07:11,096 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 11:07:11,097 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2020-09-25 11:07:11,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-25 11:07:11,098 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:07:11,099 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 11:07:11,099 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 11:07:11,099 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:07:11,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:07:11,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1617834856, now seen corresponding path program 1 times [2020-09-25 11:07:11,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:07:11,101 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [684082489] [2020-09-25 11:07:11,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:07:11,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:07:11,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:07:11,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:07:11,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:07:11,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:07:11,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-25 11:07:11,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 11:07:11,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 869 [2020-09-25 11:07:11,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:07:11,986 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:07:11,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 11:07:11,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-25 11:07:11,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-25 11:07:11,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:07:12,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:07:12,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:07:12,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:07:12,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:07:12,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:07:12,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:07:12,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 11:07:12,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:07:12,017 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:07:12,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:07:12,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:07:12,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:07:12,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:07:12,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-25 11:07:12,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:07:12,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:07:12,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:07:12,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:07:12,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-09-25 11:07:12,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 11:07:12,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 359 [2020-09-25 11:07:12,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:07:12,387 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:07:12,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-25 11:07:12,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:07:12,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-09-25 11:07:12,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:07:12,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-25 11:07:12,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:07:12,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:07:12,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:07:12,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 11:07:12,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:07:12,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-25 11:07:12,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:07:12,470 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:07:12,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 11:07:12,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:07:12,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 11:07:12,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:07:12,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-25 11:07:12,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:07:12,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:07:12,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:07:12,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 11:07:12,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:07:12,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-09-25 11:07:12,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:07:12,528 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:07:12,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 11:07:12,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:07:12,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 11:07:12,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:07:12,551 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-25 11:07:12,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [684082489] [2020-09-25 11:07:12,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 11:07:12,552 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-25 11:07:12,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421364677] [2020-09-25 11:07:12,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 11:07:12,554 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:07:12,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 11:07:12,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-25 11:07:12,555 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand 8 states. [2020-09-25 11:07:12,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:07:12,694 INFO L93 Difference]: Finished difference Result 63 states and 75 transitions. [2020-09-25 11:07:12,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 11:07:12,695 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-09-25 11:07:12,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:07:12,697 INFO L225 Difference]: With dead ends: 63 [2020-09-25 11:07:12,698 INFO L226 Difference]: Without dead ends: 57 [2020-09-25 11:07:12,699 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-09-25 11:07:12,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-09-25 11:07:12,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 50. [2020-09-25 11:07:12,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-25 11:07:12,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2020-09-25 11:07:12,719 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 33 [2020-09-25 11:07:12,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:07:12,720 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2020-09-25 11:07:12,720 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 11:07:12,720 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2020-09-25 11:07:12,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-25 11:07:12,724 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:07:12,725 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 11:07:12,725 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 11:07:12,725 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:07:12,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:07:12,727 INFO L82 PathProgramCache]: Analyzing trace with hash -159162515, now seen corresponding path program 1 times [2020-09-25 11:07:12,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:07:12,729 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1795650285] [2020-09-25 11:07:12,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:07:12,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:07:12,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:07:12,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:07:12,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:07:12,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:07:13,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:07:13,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:07:14,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:07:14,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-09-25 11:07:14,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 11:07:14,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1738 [2020-09-25 11:07:14,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:07:14,482 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:07:14,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 11:07:14,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 11:07:14,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-25 11:07:14,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:07:14,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:07:14,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:07:14,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:07:14,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:07:14,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:07:14,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:07:14,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 11:07:14,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:07:14,498 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:07:14,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:07:14,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:07:14,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:07:14,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:07:14,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-25 11:07:14,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:07:14,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:07:14,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:07:14,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:07:14,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:07:14,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:07:14,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:07:14,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-25 11:07:14,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 11:07:14,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 364 [2020-09-25 11:07:14,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:07:14,872 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:07:14,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 11:07:14,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-25 11:07:14,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-09-25 11:07:14,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:07:14,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-25 11:07:14,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:07:14,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:07:14,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:07:14,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 11:07:14,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:07:14,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 11:07:14,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:07:14,907 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:07:14,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 11:07:14,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:07:14,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 11:07:14,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:07:14,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-25 11:07:14,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:07:14,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:07:14,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:07:14,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:07:14,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 11:07:14,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 11:07:14,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-09-25 11:07:14,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:07:14,947 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:07:14,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 11:07:14,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:07:14,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-25 11:07:14,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:07:14,975 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 11:07:14,976 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1795650285] [2020-09-25 11:07:14,976 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 11:07:14,976 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-25 11:07:14,976 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020997045] [2020-09-25 11:07:14,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 11:07:14,977 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:07:14,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 11:07:14,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-25 11:07:14,978 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand 7 states. [2020-09-25 11:07:15,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:07:15,113 INFO L93 Difference]: Finished difference Result 62 states and 73 transitions. [2020-09-25 11:07:15,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-25 11:07:15,113 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 34 [2020-09-25 11:07:15,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:07:15,115 INFO L225 Difference]: With dead ends: 62 [2020-09-25 11:07:15,116 INFO L226 Difference]: Without dead ends: 56 [2020-09-25 11:07:15,116 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-25 11:07:15,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-09-25 11:07:15,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 50. [2020-09-25 11:07:15,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-25 11:07:15,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2020-09-25 11:07:15,127 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 34 [2020-09-25 11:07:15,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:07:15,127 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2020-09-25 11:07:15,127 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 11:07:15,127 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2020-09-25 11:07:15,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-25 11:07:15,129 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:07:15,129 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 11:07:15,130 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 11:07:15,130 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:07:15,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:07:15,130 INFO L82 PathProgramCache]: Analyzing trace with hash 887160861, now seen corresponding path program 2 times [2020-09-25 11:07:15,131 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:07:15,131 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [800506115] [2020-09-25 11:07:15,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:07:15,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 11:07:15,140 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 11:07:15,141 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 11:07:15,146 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 11:07:15,170 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 11:07:15 BoogieIcfgContainer [2020-09-25 11:07:15,170 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 11:07:15,174 INFO L168 Benchmark]: Toolchain (without parser) took 6140.62 ms. Allocated memory was 147.3 MB in the beginning and 242.2 MB in the end (delta: 94.9 MB). Free memory was 103.5 MB in the beginning and 132.4 MB in the end (delta: -28.9 MB). Peak memory consumption was 66.0 MB. Max. memory is 7.1 GB. [2020-09-25 11:07:15,175 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 147.3 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-25 11:07:15,176 INFO L168 Benchmark]: CACSL2BoogieTranslator took 332.36 ms. Allocated memory is still 147.3 MB. Free memory was 102.9 MB in the beginning and 93.2 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-09-25 11:07:15,177 INFO L168 Benchmark]: Boogie Preprocessor took 183.42 ms. Allocated memory was 147.3 MB in the beginning and 206.6 MB in the end (delta: 59.2 MB). Free memory was 93.2 MB in the beginning and 184.7 MB in the end (delta: -91.4 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-09-25 11:07:15,178 INFO L168 Benchmark]: RCFGBuilder took 351.43 ms. Allocated memory is still 206.6 MB. Free memory was 184.7 MB in the beginning and 170.7 MB in the end (delta: 14.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. [2020-09-25 11:07:15,179 INFO L168 Benchmark]: TraceAbstraction took 5264.10 ms. Allocated memory was 206.6 MB in the beginning and 242.2 MB in the end (delta: 35.7 MB). Free memory was 170.1 MB in the beginning and 132.4 MB in the end (delta: 37.7 MB). Peak memory consumption was 73.3 MB. Max. memory is 7.1 GB. [2020-09-25 11:07:15,182 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 147.3 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 332.36 ms. Allocated memory is still 147.3 MB. Free memory was 102.9 MB in the beginning and 93.2 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 183.42 ms. Allocated memory was 147.3 MB in the beginning and 206.6 MB in the end (delta: 59.2 MB). Free memory was 93.2 MB in the beginning and 184.7 MB in the end (delta: -91.4 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 351.43 ms. Allocated memory is still 206.6 MB. Free memory was 184.7 MB in the beginning and 170.7 MB in the end (delta: 14.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5264.10 ms. Allocated memory was 206.6 MB in the beginning and 242.2 MB in the end (delta: 35.7 MB). Free memory was 170.1 MB in the beginning and 132.4 MB in the end (delta: 37.7 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: 5.1s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 169 SDtfs, 56 SDslu, 609 SDs, 0 SdLazy, 191 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s 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, 4 MinimizatonAttempts, 15 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 4.2s InterpolantComputationTime, 134 NumberOfCodeBlocks, 134 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 96 ConstructedInterpolants, 0 QuantifiedInterpolants, 6900 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 9/9 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...