/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_o3.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 13:06:10,494 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 13:06:10,497 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 13:06:10,524 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 13:06:10,525 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 13:06:10,533 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 13:06:10,535 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 13:06:10,538 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 13:06:10,541 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 13:06:10,545 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 13:06:10,546 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 13:06:10,547 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 13:06:10,547 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 13:06:10,549 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 13:06:10,553 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 13:06:10,555 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 13:06:10,556 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 13:06:10,557 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 13:06:10,558 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 13:06:10,566 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 13:06:10,569 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 13:06:10,570 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 13:06:10,570 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 13:06:10,571 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 13:06:10,583 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 13:06:10,584 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 13:06:10,588 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 13:06:10,589 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 13:06:10,589 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 13:06:10,590 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 13:06:10,590 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 13:06:10,594 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 13:06:10,595 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 13:06:10,596 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 13:06:10,596 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 13:06:10,597 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 13:06:10,600 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 13:06:10,601 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 13:06:10,601 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 13:06:10,602 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 13:06:10,602 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 13:06:10,604 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 13:06:10,640 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 13:06:10,640 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 13:06:10,642 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 13:06:10,642 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 13:06:10,642 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 13:06:10,642 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 13:06:10,643 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 13:06:10,643 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 13:06:10,643 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 13:06:10,643 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 13:06:10,643 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 13:06:10,643 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 13:06:10,644 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 13:06:10,644 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 13:06:10,644 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 13:06:10,644 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 13:06:10,644 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 13:06:10,645 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 13:06:10,645 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 13:06:10,645 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 13:06:10,645 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 13:06:10,645 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 13:06:10,646 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 13:06:10,646 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 13:06:10,646 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 13:06:10,646 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 13:06:10,646 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 13:06:10,647 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 13:06:10,647 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 13:06:10,647 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 13:06:10,991 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 13:06:11,008 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 13:06:11,013 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 13:06:11,015 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 13:06:11,015 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 13:06:11,016 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_o3.c [2020-10-13 13:06:11,078 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/56ab70313/49e2a5fddcf24b5e859567c179fa1ce8/FLAG763433539 [2020-10-13 13:06:11,510 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 13:06:11,511 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id_o3.c [2020-10-13 13:06:11,521 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/56ab70313/49e2a5fddcf24b5e859567c179fa1ce8/FLAG763433539 [2020-10-13 13:06:11,837 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/56ab70313/49e2a5fddcf24b5e859567c179fa1ce8 [2020-10-13 13:06:11,847 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 13:06:11,849 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 13:06:11,850 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 13:06:11,851 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 13:06:11,855 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 13:06:11,856 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 01:06:11" (1/1) ... [2020-10-13 13:06:11,859 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67e77f45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:06:11, skipping insertion in model container [2020-10-13 13:06:11,859 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 01:06:11" (1/1) ... [2020-10-13 13:06:11,868 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 13:06:11,885 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 13:06:12,064 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 13:06:12,072 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 13:06:12,091 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 13:06:12,104 INFO L208 MainTranslator]: Completed translation [2020-10-13 13:06:12,104 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:06:12 WrapperNode [2020-10-13 13:06:12,104 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 13:06:12,105 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 13:06:12,105 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 13:06:12,105 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 13:06:12,117 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:06:12" (1/1) ... [2020-10-13 13:06:12,117 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:06:12" (1/1) ... [2020-10-13 13:06:12,121 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:06:12" (1/1) ... [2020-10-13 13:06:12,122 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:06:12" (1/1) ... [2020-10-13 13:06:12,125 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:06:12" (1/1) ... [2020-10-13 13:06:12,127 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:06:12" (1/1) ... [2020-10-13 13:06:12,128 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:06:12" (1/1) ... [2020-10-13 13:06:12,129 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 13:06:12,130 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 13:06:12,130 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 13:06:12,130 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 13:06:12,131 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:06:12" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 13:06:12,276 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 13:06:12,277 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 13:06:12,277 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-10-13 13:06:12,277 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 13:06:12,277 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-13 13:06:12,277 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 13:06:12,278 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-10-13 13:06:12,279 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 13:06:12,279 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 13:06:12,280 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 13:06:12,490 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 13:06:12,491 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-13 13:06:12,498 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 01:06:12 BoogieIcfgContainer [2020-10-13 13:06:12,498 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 13:06:12,501 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 13:06:12,502 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 13:06:12,505 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 13:06:12,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 01:06:11" (1/3) ... [2020-10-13 13:06:12,507 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c584c71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 01:06:12, skipping insertion in model container [2020-10-13 13:06:12,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:06:12" (2/3) ... [2020-10-13 13:06:12,508 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c584c71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 01:06:12, skipping insertion in model container [2020-10-13 13:06:12,509 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 01:06:12" (3/3) ... [2020-10-13 13:06:12,511 INFO L109 eAbstractionObserver]: Analyzing ICFG id_o3.c [2020-10-13 13:06:12,523 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 13:06:12,532 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 13:06:12,551 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 13:06:12,585 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 13:06:12,585 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 13:06:12,586 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 13:06:12,587 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 13:06:12,587 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 13:06:12,587 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 13:06:12,587 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 13:06:12,587 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 13:06:12,612 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-10-13 13:06:12,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-13 13:06:12,621 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:06:12,622 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:06:12,622 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:06:12,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:06:12,628 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2020-10-13 13:06:12,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:06:12,635 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [678710324] [2020-10-13 13:06:12,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:06:12,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:06:12,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:06:12,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:06:12,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-13 13:06:12,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:06:12,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 102 [2020-10-13 13:06:12,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:06:12,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 13:06:12,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 13:06:12,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 13:06:12,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 13:06:13,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:06:13,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:06:13,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:06:13,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:06:13,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 13:06:13,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:06:13,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 13:06:13,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:06:13,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:06:13,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:06:13,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:06:13,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 13:06:13,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-13 13:06:13,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:06:13,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:06:13,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:06:13,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 13:06:13,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:06:13,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-13 13:06:13,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:06:13,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 13:06:13,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:06:13,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 13:06:13,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 13:06:13,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 13:06:13,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [678710324] [2020-10-13 13:06:13,218 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:06:13,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 13:06:13,219 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505484566] [2020-10-13 13:06:13,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 13:06:13,225 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:06:13,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 13:06:13,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:06:13,242 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-10-13 13:06:13,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:06:13,287 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2020-10-13 13:06:13,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 13:06:13,290 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-10-13 13:06:13,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:06:13,299 INFO L225 Difference]: With dead ends: 32 [2020-10-13 13:06:13,300 INFO L226 Difference]: Without dead ends: 18 [2020-10-13 13:06:13,304 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:06:13,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-13 13:06:13,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-13 13:06:13,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-13 13:06:13,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-10-13 13:06:13,347 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-10-13 13:06:13,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:06:13,348 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-10-13 13:06:13,348 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 13:06:13,348 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-10-13 13:06:13,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-13 13:06:13,350 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:06:13,350 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:06:13,351 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 13:06:13,351 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:06:13,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:06:13,352 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2020-10-13 13:06:13,352 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:06:13,352 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [629133269] [2020-10-13 13:06:13,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:06:13,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:06:13,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:06:13,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:06:13,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-13 13:06:13,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:06:13,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 104 [2020-10-13 13:06:13,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:06:13,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 13:06:13,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 13:06:13,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 13:06:13,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 13:06:13,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:06:13,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:06:13,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:06:13,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:06:13,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 13:06:13,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:06:13,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 13:06:13,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:06:13,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:06:13,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:06:13,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:06:13,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 13:06:13,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-13 13:06:13,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:06:13,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:06:13,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:06:13,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-13 13:06:13,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:06:13,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 85 [2020-10-13 13:06:13,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:06:13,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 13:06:13,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:06:13,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 13:06:13,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:06:13,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-13 13:06:13,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:06:13,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:06:13,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:06:13,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 13:06:13,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:06:13,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 13:06:13,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:06:13,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 13:06:13,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:06:13,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 13:06:13,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 13:06:13,744 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 13:06:13,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [629133269] [2020-10-13 13:06:13,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 13:06:13,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 13:06:13,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564823592] [2020-10-13 13:06:13,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 13:06:13,748 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:06:13,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 13:06:13,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-13 13:06:13,749 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 7 states. [2020-10-13 13:06:13,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:06:13,780 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-10-13 13:06:13,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 13:06:13,781 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-10-13 13:06:13,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:06:13,783 INFO L225 Difference]: With dead ends: 25 [2020-10-13 13:06:13,783 INFO L226 Difference]: Without dead ends: 21 [2020-10-13 13:06:13,784 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-13 13:06:13,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-13 13:06:13,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-13 13:06:13,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-13 13:06:13,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-10-13 13:06:13,792 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-10-13 13:06:13,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:06:13,792 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-10-13 13:06:13,792 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 13:06:13,793 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-10-13 13:06:13,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-13 13:06:13,794 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:06:13,794 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:06:13,794 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 13:06:13,795 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:06:13,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:06:13,795 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2020-10-13 13:06:13,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:06:13,796 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [337361909] [2020-10-13 13:06:13,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:06:13,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:06:13,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:06:13,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:06:13,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 13:06:13,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:06:13,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 127 [2020-10-13 13:06:13,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:06:13,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 13:06:13,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 13:06:13,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 13:06:13,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:06:13,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:06:13,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:06:13,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:06:13,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:06:13,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 13:06:13,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:06:13,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 13:06:13,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:06:13,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:06:13,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:06:13,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:06:13,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:06:13,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-13 13:06:13,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:06:14,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:06:14,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:06:14,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 13:06:14,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:06:14,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 60 [2020-10-13 13:06:14,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:06:14,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 13:06:14,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:06:14,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 13:06:14,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:06:14,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-13 13:06:14,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:06:14,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:06:14,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:06:14,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-13 13:06:14,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:06:14,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-13 13:06:14,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:06:14,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 13:06:14,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:06:14,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 13:06:14,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 13:06:14,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-13 13:06:14,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:06:14,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:06:14,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:06:14,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 13:06:14,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:06:14,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 13:06:14,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:06:14,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 13:06:14,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:06:14,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 13:06:14,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 13:06:14,208 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-13 13:06:14,208 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [337361909] [2020-10-13 13:06:14,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 13:06:14,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 13:06:14,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146398106] [2020-10-13 13:06:14,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 13:06:14,210 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:06:14,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 13:06:14,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-13 13:06:14,211 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 9 states. [2020-10-13 13:06:14,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:06:14,257 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-10-13 13:06:14,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 13:06:14,258 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-10-13 13:06:14,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:06:14,259 INFO L225 Difference]: With dead ends: 28 [2020-10-13 13:06:14,259 INFO L226 Difference]: Without dead ends: 24 [2020-10-13 13:06:14,260 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-13 13:06:14,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-13 13:06:14,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-13 13:06:14,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-13 13:06:14,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-10-13 13:06:14,267 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-10-13 13:06:14,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:06:14,267 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-10-13 13:06:14,267 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 13:06:14,267 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-10-13 13:06:14,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-13 13:06:14,269 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:06:14,269 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:06:14,269 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 13:06:14,270 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:06:14,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:06:14,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2020-10-13 13:06:14,271 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:06:14,271 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [837396267] [2020-10-13 13:06:14,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:06:14,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-13 13:06:14,284 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-13 13:06:14,284 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-13 13:06:14,289 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 13:06:14,308 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 01:06:14 BoogieIcfgContainer [2020-10-13 13:06:14,309 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-13 13:06:14,312 INFO L168 Benchmark]: Toolchain (without parser) took 2461.70 ms. Allocated memory was 146.3 MB in the beginning and 235.4 MB in the end (delta: 89.1 MB). Free memory was 101.4 MB in the beginning and 158.0 MB in the end (delta: -56.6 MB). Peak memory consumption was 32.5 MB. Max. memory is 7.1 GB. [2020-10-13 13:06:14,313 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 146.3 MB. Free memory was 119.5 MB in the beginning and 119.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-10-13 13:06:14,313 INFO L168 Benchmark]: CACSL2BoogieTranslator took 254.12 ms. Allocated memory is still 146.3 MB. Free memory was 101.2 MB in the beginning and 91.9 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-10-13 13:06:14,314 INFO L168 Benchmark]: Boogie Preprocessor took 24.67 ms. Allocated memory is still 146.3 MB. Free memory was 91.9 MB in the beginning and 90.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-10-13 13:06:14,315 INFO L168 Benchmark]: RCFGBuilder took 368.09 ms. Allocated memory was 146.3 MB in the beginning and 202.4 MB in the end (delta: 56.1 MB). Free memory was 90.5 MB in the beginning and 171.0 MB in the end (delta: -80.5 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-10-13 13:06:14,316 INFO L168 Benchmark]: TraceAbstraction took 1808.07 ms. Allocated memory was 202.4 MB in the beginning and 235.4 MB in the end (delta: 33.0 MB). Free memory was 170.3 MB in the beginning and 158.0 MB in the end (delta: 12.3 MB). Peak memory consumption was 45.3 MB. Max. memory is 7.1 GB. [2020-10-13 13:06:14,320 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 146.3 MB. Free memory was 119.5 MB in the beginning and 119.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 254.12 ms. Allocated memory is still 146.3 MB. Free memory was 101.2 MB in the beginning and 91.9 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 24.67 ms. Allocated memory is still 146.3 MB. Free memory was 91.9 MB in the beginning and 90.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 368.09 ms. Allocated memory was 146.3 MB in the beginning and 202.4 MB in the end (delta: 56.1 MB). Free memory was 90.5 MB in the beginning and 171.0 MB in the end (delta: -80.5 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1808.07 ms. Allocated memory was 202.4 MB in the beginning and 235.4 MB in the end (delta: 33.0 MB). Free memory was 170.3 MB in the beginning and 158.0 MB in the end (delta: 12.3 MB). Peak memory consumption was 45.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] unsigned int input = __VERIFIER_nondet_uint(); [L11] CALL, EXPR id(input) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND TRUE x==0 [L5] return 0; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L11] RET, EXPR id(input) [L11] unsigned int result = id(input); [L12] COND TRUE result == 3 [L13] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.7s, OverallIterations: 4, TraceHistogramMax: 4, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 55 SDtfs, 2 SDslu, 252 SDs, 0 SdLazy, 54 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred 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, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 88 NumberOfCodeBlocks, 88 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 54 ConstructedInterpolants, 0 QuantifiedInterpolants, 3408 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 9/18 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...