/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --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/BallRajamani-SPIN2000-Fig1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 20:22:52,696 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 20:22:52,700 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 20:22:52,726 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 20:22:52,726 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 20:22:52,728 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 20:22:52,729 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 20:22:52,731 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 20:22:52,733 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 20:22:52,734 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 20:22:52,735 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 20:22:52,736 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 20:22:52,737 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 20:22:52,738 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 20:22:52,739 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 20:22:52,740 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 20:22:52,741 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 20:22:52,742 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 20:22:52,745 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 20:22:52,747 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 20:22:52,749 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 20:22:52,750 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 20:22:52,751 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 20:22:52,752 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 20:22:52,755 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 20:22:52,756 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 20:22:52,756 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 20:22:52,757 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 20:22:52,758 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 20:22:52,759 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 20:22:52,759 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 20:22:52,760 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 20:22:52,761 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 20:22:52,762 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 20:22:52,763 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 20:22:52,763 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 20:22:52,764 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 20:22:52,764 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 20:22:52,765 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 20:22:52,766 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 20:22:52,767 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 20:22:52,768 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-24 20:22:52,794 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 20:22:52,795 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 20:22:52,798 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 20:22:52,798 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 20:22:52,799 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 20:22:52,799 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 20:22:52,799 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 20:22:52,799 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 20:22:52,799 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 20:22:52,799 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 20:22:52,800 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 20:22:52,800 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 20:22:52,800 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 20:22:52,800 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 20:22:52,800 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 20:22:52,801 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 20:22:52,804 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 20:22:52,804 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 20:22:52,804 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 20:22:52,804 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 20:22:52,805 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 20:22:52,805 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 20:22:52,805 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 20:22:52,805 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 20:22:52,805 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 20:22:52,806 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 20:22:52,806 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 20:22:52,806 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 20:22:52,806 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 20:22:52,806 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; [2020-09-24 20:22:53,264 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 20:22:53,281 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 20:22:53,286 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 20:22:53,288 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 20:22:53,288 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 20:22:53,289 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/BallRajamani-SPIN2000-Fig1.c [2020-09-24 20:22:53,364 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/06cd55bb9/a2e58794c269478999fb26e8ff8ac1f2/FLAG413e61eb0 [2020-09-24 20:22:53,903 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 20:22:53,903 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive/BallRajamani-SPIN2000-Fig1.c [2020-09-24 20:22:53,910 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/06cd55bb9/a2e58794c269478999fb26e8ff8ac1f2/FLAG413e61eb0 [2020-09-24 20:22:54,274 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/06cd55bb9/a2e58794c269478999fb26e8ff8ac1f2 [2020-09-24 20:22:54,286 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 20:22:54,293 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 20:22:54,294 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 20:22:54,294 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 20:22:54,298 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 20:22:54,299 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 08:22:54" (1/1) ... [2020-09-24 20:22:54,303 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42b4b692 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:22:54, skipping insertion in model container [2020-09-24 20:22:54,304 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 08:22:54" (1/1) ... [2020-09-24 20:22:54,312 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 20:22:54,337 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 20:22:54,551 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 20:22:54,557 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 20:22:54,576 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 20:22:54,594 INFO L208 MainTranslator]: Completed translation [2020-09-24 20:22:54,594 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:22:54 WrapperNode [2020-09-24 20:22:54,594 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 20:22:54,595 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 20:22:54,595 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 20:22:54,596 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 20:22:54,613 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:22:54" (1/1) ... [2020-09-24 20:22:54,613 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:22:54" (1/1) ... [2020-09-24 20:22:54,620 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:22:54" (1/1) ... [2020-09-24 20:22:54,620 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:22:54" (1/1) ... [2020-09-24 20:22:54,624 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:22:54" (1/1) ... [2020-09-24 20:22:54,627 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:22:54" (1/1) ... [2020-09-24 20:22:54,628 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:22:54" (1/1) ... [2020-09-24 20:22:54,629 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 20:22:54,630 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 20:22:54,630 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 20:22:54,630 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 20:22:54,631 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:22:54" (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 [2020-09-24 20:22:54,785 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 20:22:54,785 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 20:22:54,786 INFO L138 BoogieDeclarations]: Found implementation of procedure A [2020-09-24 20:22:54,786 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 20:22:54,786 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 20:22:54,786 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 20:22:54,786 INFO L130 BoogieDeclarations]: Found specification of procedure A [2020-09-24 20:22:54,787 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 20:22:54,787 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 20:22:54,787 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 20:22:54,994 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 20:22:54,994 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-24 20:22:55,001 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 08:22:55 BoogieIcfgContainer [2020-09-24 20:22:55,001 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 20:22:55,019 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 20:22:55,019 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 20:22:55,027 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 20:22:55,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 08:22:54" (1/3) ... [2020-09-24 20:22:55,028 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b044780 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 08:22:55, skipping insertion in model container [2020-09-24 20:22:55,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:22:54" (2/3) ... [2020-09-24 20:22:55,034 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b044780 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 08:22:55, skipping insertion in model container [2020-09-24 20:22:55,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 08:22:55" (3/3) ... [2020-09-24 20:22:55,037 INFO L109 eAbstractionObserver]: Analyzing ICFG BallRajamani-SPIN2000-Fig1.c [2020-09-24 20:22:55,065 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 20:22:55,087 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 20:22:55,115 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 20:22:55,145 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 20:22:55,146 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 20:22:55,146 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 20:22:55,146 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 20:22:55,146 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 20:22:55,146 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 20:22:55,147 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 20:22:55,147 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 20:22:55,170 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-09-24 20:22:55,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-24 20:22:55,178 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:22:55,179 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:22:55,179 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:22:55,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:22:55,186 INFO L82 PathProgramCache]: Analyzing trace with hash 31169137, now seen corresponding path program 1 times [2020-09-24 20:22:55,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:22:55,195 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1693929057] [2020-09-24 20:22:55,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:22:55,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:22:55,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:22:55,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:22:55,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:22:55,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-24 20:22:55,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 20:22:55,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 557 [2020-09-24 20:22:55,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:22:55,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 20:22:55,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-09-24 20:22:55,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-24 20:22:55,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 20:22:56,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:22:56,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:22:56,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:22:56,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:22:56,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-24 20:22:56,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:22:56,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 20:22:56,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:22:56,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:22:56,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:22:56,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:22:56,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:22:56,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-24 20:22:56,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:22:56,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:22:56,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:22:56,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 20:22:56,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:22:56,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 20:22:56,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:22:56,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:22:56,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:22:56,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:22:56,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:22:56,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-24 20:22:56,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:22:56,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:22:56,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:22:56,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 20:22:56,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:22:56,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-09-24 20:22:56,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:22:56,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 20:22:56,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:22:56,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 20:22:56,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:22:56,130 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 20:22:56,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1693929057] [2020-09-24 20:22:56,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 20:22:56,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-24 20:22:56,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079536880] [2020-09-24 20:22:56,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 20:22:56,145 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:22:56,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 20:22:56,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-24 20:22:56,162 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 6 states. [2020-09-24 20:22:56,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:22:56,341 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2020-09-24 20:22:56,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 20:22:56,344 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-09-24 20:22:56,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:22:56,363 INFO L225 Difference]: With dead ends: 60 [2020-09-24 20:22:56,363 INFO L226 Difference]: Without dead ends: 29 [2020-09-24 20:22:56,369 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-09-24 20:22:56,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-09-24 20:22:56,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-09-24 20:22:56,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-09-24 20:22:56,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-09-24 20:22:56,419 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 29 [2020-09-24 20:22:56,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:22:56,420 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-09-24 20:22:56,420 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 20:22:56,420 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-09-24 20:22:56,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-09-24 20:22:56,423 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:22:56,424 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:22:56,424 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 20:22:56,424 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:22:56,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:22:56,425 INFO L82 PathProgramCache]: Analyzing trace with hash 812451921, now seen corresponding path program 1 times [2020-09-24 20:22:56,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:22:56,426 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1479847385] [2020-09-24 20:22:56,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:22:56,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-24 20:22:56,449 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-24 20:22:56,450 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 20:22:56,456 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 20:22:56,478 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 08:22:56 BoogieIcfgContainer [2020-09-24 20:22:56,478 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 20:22:56,482 INFO L168 Benchmark]: Toolchain (without parser) took 2192.27 ms. Allocated memory was 140.5 MB in the beginning and 202.9 MB in the end (delta: 62.4 MB). Free memory was 102.5 MB in the beginning and 95.0 MB in the end (delta: 7.5 MB). Peak memory consumption was 69.9 MB. Max. memory is 7.1 GB. [2020-09-24 20:22:56,483 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 140.5 MB. Free memory was 120.8 MB in the beginning and 120.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-24 20:22:56,484 INFO L168 Benchmark]: CACSL2BoogieTranslator took 301.08 ms. Allocated memory is still 140.5 MB. Free memory was 101.9 MB in the beginning and 92.4 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-09-24 20:22:56,485 INFO L168 Benchmark]: Boogie Preprocessor took 34.21 ms. Allocated memory is still 140.5 MB. Free memory was 92.4 MB in the beginning and 91.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-09-24 20:22:56,486 INFO L168 Benchmark]: RCFGBuilder took 371.84 ms. Allocated memory was 140.5 MB in the beginning and 202.9 MB in the end (delta: 62.4 MB). Free memory was 91.0 MB in the beginning and 170.1 MB in the end (delta: -79.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. [2020-09-24 20:22:56,487 INFO L168 Benchmark]: TraceAbstraction took 1459.52 ms. Allocated memory is still 202.9 MB. Free memory was 169.5 MB in the beginning and 95.0 MB in the end (delta: 74.5 MB). Peak memory consumption was 74.5 MB. Max. memory is 7.1 GB. [2020-09-24 20:22:56,491 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 140.5 MB. Free memory was 120.8 MB in the beginning and 120.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 301.08 ms. Allocated memory is still 140.5 MB. Free memory was 101.9 MB in the beginning and 92.4 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 34.21 ms. Allocated memory is still 140.5 MB. Free memory was 92.4 MB in the beginning and 91.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 371.84 ms. Allocated memory was 140.5 MB in the beginning and 202.9 MB in the end (delta: 62.4 MB). Free memory was 91.0 MB in the beginning and 170.1 MB in the end (delta: -79.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1459.52 ms. Allocated memory is still 202.9 MB. Free memory was 169.5 MB in the beginning and 95.0 MB in the end (delta: 74.5 MB). Peak memory consumption was 74.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 31]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L14] int g; [L26] int g = __VERIFIER_nondet_int(); [L27] int h = !g; [L28] CALL A(g,h) [L17] COND TRUE \read(a1) [L18] CALL A(a2,a1) [L17] COND FALSE !(\read(a1)) [L20] g = a2 [L18] RET A(a2,a1) [L28] RET A(g,h) [L29] CALL A(g,h) [L17] COND TRUE \read(a1) [L18] CALL A(a2,a1) [L17] COND FALSE !(\read(a1)) [L20] g = a2 [L18] RET A(a2,a1) [L29] RET A(g,h) [L30] COND TRUE \read(g) [L31] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.3s, OverallIterations: 2, TraceHistogramMax: 4, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 28 SDtfs, 21 SDslu, 77 SDs, 0 SdLazy, 44 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 74 NumberOfCodeBlocks, 74 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 28 ConstructedInterpolants, 0 QuantifiedInterpolants, 2464 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 6/6 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...