/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 --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 interpolation-heuristic=FIRST --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/id_o3.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 11:21:52,962 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 11:21:52,965 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 11:21:52,993 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 11:21:52,993 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 11:21:52,995 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 11:21:52,996 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 11:21:52,998 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 11:21:53,000 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 11:21:53,001 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 11:21:53,002 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 11:21:53,004 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 11:21:53,004 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 11:21:53,005 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 11:21:53,006 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 11:21:53,008 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 11:21:53,009 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 11:21:53,010 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 11:21:53,012 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 11:21:53,014 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 11:21:53,016 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 11:21:53,017 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 11:21:53,019 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 11:21:53,020 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 11:21:53,022 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 11:21:53,023 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 11:21:53,023 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 11:21:53,024 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 11:21:53,025 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 11:21:53,026 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 11:21:53,026 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 11:21:53,027 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 11:21:53,028 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 11:21:53,029 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 11:21:53,030 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 11:21:53,030 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 11:21:53,031 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 11:21:53,032 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 11:21:53,032 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 11:21:53,033 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 11:21:53,034 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 11:21:53,035 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 [2020-09-21 11:21:53,063 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 11:21:53,063 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 11:21:53,064 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 11:21:53,065 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 11:21:53,065 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 11:21:53,065 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 11:21:53,065 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 11:21:53,066 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 11:21:53,066 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 11:21:53,066 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 11:21:53,066 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 11:21:53,066 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 11:21:53,067 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 11:21:53,068 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 11:21:53,069 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 11:21:53,069 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 11:21:53,069 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 11:21:53,069 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 11:21:53,069 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 11:21:53,070 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 11:21:53,070 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 11:21:53,071 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 11:21:53,071 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 11:21:53,071 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 11:21:53,071 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 11:21:53,071 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 11:21:53,072 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 11:21:53,072 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 11:21:53,072 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 11:21:53,072 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.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;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;log-additional-information=true; [2020-09-21 11:21:53,535 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 11:21:53,553 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 11:21:53,557 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 11:21:53,559 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 11:21:53,560 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 11:21:53,561 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_o3.c [2020-09-21 11:21:53,662 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fae3300a8/dea2e691d8eb487280486afc6e04ddc2/FLAG25bfd04fd [2020-09-21 11:21:54,221 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 11:21:54,222 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id_o3.c [2020-09-21 11:21:54,230 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fae3300a8/dea2e691d8eb487280486afc6e04ddc2/FLAG25bfd04fd [2020-09-21 11:21:54,556 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fae3300a8/dea2e691d8eb487280486afc6e04ddc2 [2020-09-21 11:21:54,571 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 11:21:54,576 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 11:21:54,578 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 11:21:54,578 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 11:21:54,583 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 11:21:54,584 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:21:54" (1/1) ... [2020-09-21 11:21:54,588 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@131dba71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:21:54, skipping insertion in model container [2020-09-21 11:21:54,588 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:21:54" (1/1) ... [2020-09-21 11:21:54,598 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 11:21:54,625 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 11:21:54,834 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:21:54,840 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 11:21:54,860 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:21:54,877 INFO L208 MainTranslator]: Completed translation [2020-09-21 11:21:54,878 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:21:54 WrapperNode [2020-09-21 11:21:54,878 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 11:21:54,879 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 11:21:54,879 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 11:21:54,879 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 11:21:54,892 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:21:54" (1/1) ... [2020-09-21 11:21:54,893 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:21:54" (1/1) ... [2020-09-21 11:21:54,898 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:21:54" (1/1) ... [2020-09-21 11:21:54,899 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:21:54" (1/1) ... [2020-09-21 11:21:54,903 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:21:54" (1/1) ... [2020-09-21 11:21:54,906 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:21:54" (1/1) ... [2020-09-21 11:21:54,907 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:21:54" (1/1) ... [2020-09-21 11:21:54,908 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 11:21:54,909 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 11:21:54,909 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 11:21:54,909 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 11:21:54,910 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:21:54" (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 [2020-09-21 11:21:55,064 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 11:21:55,065 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 11:21:55,065 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-09-21 11:21:55,065 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 11:21:55,065 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-21 11:21:55,066 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 11:21:55,066 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-09-21 11:21:55,066 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 11:21:55,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 11:21:55,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 11:21:55,252 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 11:21:55,253 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-21 11:21:55,257 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:21:55 BoogieIcfgContainer [2020-09-21 11:21:55,257 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 11:21:55,258 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 11:21:55,258 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 11:21:55,262 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 11:21:55,262 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 11:21:54" (1/3) ... [2020-09-21 11:21:55,263 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@609aef5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:21:55, skipping insertion in model container [2020-09-21 11:21:55,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:21:54" (2/3) ... [2020-09-21 11:21:55,264 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@609aef5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:21:55, skipping insertion in model container [2020-09-21 11:21:55,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:21:55" (3/3) ... [2020-09-21 11:21:55,267 INFO L109 eAbstractionObserver]: Analyzing ICFG id_o3.c [2020-09-21 11:21:55,276 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 11:21:55,284 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 11:21:55,307 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 11:21:55,340 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 11:21:55,340 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 11:21:55,340 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 11:21:55,340 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 11:21:55,340 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 11:21:55,341 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 11:21:55,341 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 11:21:55,341 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 11:21:55,361 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-09-21 11:21:55,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-21 11:21:55,368 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:21:55,370 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:21:55,370 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:21:55,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:21:55,376 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2020-09-21 11:21:55,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:21:55,386 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1154515268] [2020-09-21 11:21:55,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:21:55,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:55,553 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:55,554 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:55,554 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:55,554 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:55,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-21 11:21:55,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:55,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-09-21 11:21:55,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:55,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 11:21:55,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-21 11:21:55,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-21 11:21:55,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:21:55,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:21:55,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:55,740 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:55,740 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:55,740 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:55,741 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:55,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:21:55,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:55,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 11:21:55,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:55,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:21:55,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:55,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:21:55,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:21:55,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 11:21:55,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:55,783 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:55,784 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:55,784 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:55,784 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:55,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:21:55,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:55,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-21 11:21:55,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:55,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 11:21:55,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:55,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-21 11:21:55,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:21:55,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:21:55,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1154515268] [2020-09-21 11:21:55,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:21:55,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 11:21:55,816 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909517121] [2020-09-21 11:21:55,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 11:21:55,823 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:21:55,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 11:21:55,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 11:21:55,843 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-09-21 11:21:55,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:21:55,904 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2020-09-21 11:21:55,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 11:21:55,906 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-09-21 11:21:55,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:21:55,919 INFO L225 Difference]: With dead ends: 32 [2020-09-21 11:21:55,919 INFO L226 Difference]: Without dead ends: 18 [2020-09-21 11:21:55,923 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 [2020-09-21 11:21:55,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-09-21 11:21:55,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-09-21 11:21:55,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-09-21 11:21:55,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-09-21 11:21:55,972 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-09-21 11:21:55,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:21:55,972 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-09-21 11:21:55,972 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 11:21:55,973 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-09-21 11:21:55,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-21 11:21:55,975 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:21:55,975 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:21:55,975 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 11:21:55,976 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:21:55,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:21:55,976 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2020-09-21 11:21:55,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:21:55,977 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [650187817] [2020-09-21 11:21:55,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:21:55,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:56,030 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:56,031 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:56,031 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:56,031 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:56,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-21 11:21:56,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:56,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-09-21 11:21:56,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:56,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 11:21:56,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-21 11:21:56,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-21 11:21:56,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:21:56,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:21:56,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:56,137 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:56,137 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:56,138 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:56,138 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:56,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:21:56,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:56,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-21 11:21:56,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:56,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:21:56,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:56,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:21:56,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-21 11:21:56,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 11:21:56,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:56,191 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:56,192 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:56,192 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:56,192 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:56,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-21 11:21:56,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:56,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-09-21 11:21:56,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:56,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 11:21:56,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:56,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-21 11:21:56,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:21:56,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 11:21:56,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:56,256 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:56,257 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:56,257 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:56,258 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:56,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:21:56,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:56,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-21 11:21:56,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:56,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 11:21:56,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:56,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-21 11:21:56,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:21:56,291 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-21 11:21:56,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [650187817] [2020-09-21 11:21:56,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:21:56,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 11:21:56,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830792530] [2020-09-21 11:21:56,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 11:21:56,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:21:56,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 11:21:56,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-21 11:21:56,295 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 7 states. [2020-09-21 11:21:56,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:21:56,325 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-09-21 11:21:56,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 11:21:56,326 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-09-21 11:21:56,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:21:56,327 INFO L225 Difference]: With dead ends: 25 [2020-09-21 11:21:56,327 INFO L226 Difference]: Without dead ends: 21 [2020-09-21 11:21:56,328 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-21 11:21:56,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-09-21 11:21:56,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-09-21 11:21:56,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-09-21 11:21:56,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-09-21 11:21:56,335 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-09-21 11:21:56,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:21:56,336 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-09-21 11:21:56,336 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 11:21:56,336 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-09-21 11:21:56,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-21 11:21:56,337 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:21:56,337 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:21:56,337 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 11:21:56,338 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:21:56,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:21:56,338 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2020-09-21 11:21:56,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:21:56,339 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [311266591] [2020-09-21 11:21:56,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:21:56,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:56,406 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:56,406 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:56,406 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:56,406 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:56,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-09-21 11:21:56,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:56,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-09-21 11:21:56,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:56,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-21 11:21:56,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-09-21 11:21:56,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-21 11:21:56,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:21:56,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:21:56,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:56,480 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:56,481 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:56,481 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:56,481 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:56,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:21:56,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:56,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:21:56,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:56,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:21:56,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:56,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:21:56,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-21 11:21:56,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 11:21:56,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:56,556 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:56,559 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:56,559 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:56,560 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:56,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-21 11:21:56,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:56,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-09-21 11:21:56,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:56,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-21 11:21:56,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:56,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-21 11:21:56,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:21:56,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 11:21:56,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:56,628 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:56,628 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:56,629 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:56,629 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:56,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-21 11:21:56,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:56,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-21 11:21:56,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:56,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 11:21:56,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:56,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-21 11:21:56,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:21:56,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 11:21:56,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:56,683 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:56,683 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:56,684 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:56,684 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:56,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:21:56,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:56,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-21 11:21:56,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:56,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 11:21:56,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:56,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-21 11:21:56,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:21:56,729 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-09-21 11:21:56,730 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [311266591] [2020-09-21 11:21:56,730 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:21:56,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-21 11:21:56,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153934829] [2020-09-21 11:21:56,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 11:21:56,731 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:21:56,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 11:21:56,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-09-21 11:21:56,732 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 9 states. [2020-09-21 11:21:56,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:21:56,775 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-09-21 11:21:56,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 11:21:56,776 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-09-21 11:21:56,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:21:56,777 INFO L225 Difference]: With dead ends: 28 [2020-09-21 11:21:56,777 INFO L226 Difference]: Without dead ends: 24 [2020-09-21 11:21:56,778 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 [2020-09-21 11:21:56,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-09-21 11:21:56,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-09-21 11:21:56,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-09-21 11:21:56,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-09-21 11:21:56,785 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-09-21 11:21:56,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:21:56,785 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-09-21 11:21:56,786 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 11:21:56,786 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-09-21 11:21:56,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-21 11:21:56,787 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:21:56,787 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:21:56,787 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 11:21:56,787 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:21:56,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:21:56,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2020-09-21 11:21:56,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:21:56,788 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [685333975] [2020-09-21 11:21:56,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:21:56,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-21 11:21:56,807 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-21 11:21:56,808 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-21 11:21:56,813 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 11:21:56,836 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 11:21:56 BoogieIcfgContainer [2020-09-21 11:21:56,836 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 11:21:56,842 INFO L168 Benchmark]: Toolchain (without parser) took 2265.84 ms. Allocated memory was 138.9 MB in the beginning and 233.3 MB in the end (delta: 94.4 MB). Free memory was 101.1 MB in the beginning and 192.0 MB in the end (delta: -90.9 MB). Peak memory consumption was 3.4 MB. Max. memory is 7.1 GB. [2020-09-21 11:21:56,843 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 138.9 MB. Free memory was 119.2 MB in the beginning and 119.0 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-09-21 11:21:56,844 INFO L168 Benchmark]: CACSL2BoogieTranslator took 300.20 ms. Allocated memory is still 138.9 MB. Free memory was 100.4 MB in the beginning and 91.2 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-09-21 11:21:56,845 INFO L168 Benchmark]: Boogie Preprocessor took 29.69 ms. Allocated memory is still 138.9 MB. Free memory was 91.2 MB in the beginning and 90.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.2 MB. Max. memory is 7.1 GB. [2020-09-21 11:21:56,846 INFO L168 Benchmark]: RCFGBuilder took 348.28 ms. Allocated memory was 138.9 MB in the beginning and 201.3 MB in the end (delta: 62.4 MB). Free memory was 89.8 MB in the beginning and 169.8 MB in the end (delta: -80.0 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-09-21 11:21:56,847 INFO L168 Benchmark]: TraceAbstraction took 1578.36 ms. Allocated memory was 201.3 MB in the beginning and 233.3 MB in the end (delta: 32.0 MB). Free memory was 169.8 MB in the beginning and 192.0 MB in the end (delta: -22.2 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-09-21 11:21:56,856 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 138.9 MB. Free memory was 119.2 MB in the beginning and 119.0 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 300.20 ms. Allocated memory is still 138.9 MB. Free memory was 100.4 MB in the beginning and 91.2 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 29.69 ms. Allocated memory is still 138.9 MB. Free memory was 91.2 MB in the beginning and 90.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 348.28 ms. Allocated memory was 138.9 MB in the beginning and 201.3 MB in the end (delta: 62.4 MB). Free memory was 89.8 MB in the beginning and 169.8 MB in the end (delta: -80.0 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1578.36 ms. Allocated memory was 201.3 MB in the beginning and 233.3 MB in the end (delta: 32.0 MB). Free memory was 169.8 MB in the beginning and 192.0 MB in the end (delta: -22.2 MB). Peak memory consumption was 9.8 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: 1.4s, 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, 0.9s InterpolantComputationTime, 88 NumberOfCodeBlocks, 88 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 54 ConstructedInterpolants, 0 QuantifiedInterpolants, 3504 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...