/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/trex02-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 16:26:02,727 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 16:26:02,729 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 16:26:02,755 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 16:26:02,755 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 16:26:02,756 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 16:26:02,758 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 16:26:02,760 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 16:26:02,761 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 16:26:02,762 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 16:26:02,763 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 16:26:02,764 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 16:26:02,765 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 16:26:02,766 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 16:26:02,767 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 16:26:02,768 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 16:26:02,769 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 16:26:02,770 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 16:26:02,771 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 16:26:02,773 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 16:26:02,775 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 16:26:02,776 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 16:26:02,778 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 16:26:02,778 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 16:26:02,781 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 16:26:02,781 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 16:26:02,782 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 16:26:02,783 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 16:26:02,783 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 16:26:02,784 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 16:26:02,785 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 16:26:02,786 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 16:26:02,786 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 16:26:02,787 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 16:26:02,788 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 16:26:02,788 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 16:26:02,789 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 16:26:02,789 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 16:26:02,790 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 16:26:02,791 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 16:26:02,791 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 16:26:02,792 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-12 16:26:02,819 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 16:26:02,819 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 16:26:02,824 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 16:26:02,824 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 16:26:02,824 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 16:26:02,824 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 16:26:02,825 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 16:26:02,825 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 16:26:02,825 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 16:26:02,825 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 16:26:02,825 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 16:26:02,826 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 16:26:02,826 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 16:26:02,826 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 16:26:02,826 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 16:26:02,826 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 16:26:02,827 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 16:26:02,827 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 16:26:02,829 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 16:26:02,829 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 16:26:02,830 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 16:26:02,830 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 16:26:02,830 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 16:26:02,830 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 16:26:02,831 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 16:26:02,831 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 16:26:02,831 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 16:26:02,831 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 16:26:02,831 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 16:26:02,831 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 16:26:03,187 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 16:26:03,200 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 16:26:03,203 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 16:26:03,205 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 16:26:03,205 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 16:26:03,206 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/trex02-2.c [2020-10-12 16:26:03,272 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8bb1f4620/d5de1af9b97241a39f456ac09eecb271/FLAG273de79ca [2020-10-12 16:26:03,716 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 16:26:03,717 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/trex02-2.c [2020-10-12 16:26:03,724 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8bb1f4620/d5de1af9b97241a39f456ac09eecb271/FLAG273de79ca [2020-10-12 16:26:04,133 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8bb1f4620/d5de1af9b97241a39f456ac09eecb271 [2020-10-12 16:26:04,144 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 16:26:04,146 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 16:26:04,147 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 16:26:04,147 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 16:26:04,151 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 16:26:04,152 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 04:26:04" (1/1) ... [2020-10-12 16:26:04,155 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@490952e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:26:04, skipping insertion in model container [2020-10-12 16:26:04,155 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 04:26:04" (1/1) ... [2020-10-12 16:26:04,163 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 16:26:04,182 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 16:26:04,398 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 16:26:04,402 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 16:26:04,414 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 16:26:04,426 INFO L208 MainTranslator]: Completed translation [2020-10-12 16:26:04,426 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:26:04 WrapperNode [2020-10-12 16:26:04,426 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 16:26:04,427 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 16:26:04,427 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 16:26:04,428 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 16:26:04,439 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:26:04" (1/1) ... [2020-10-12 16:26:04,439 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:26:04" (1/1) ... [2020-10-12 16:26:04,524 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:26:04" (1/1) ... [2020-10-12 16:26:04,524 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:26:04" (1/1) ... [2020-10-12 16:26:04,534 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:26:04" (1/1) ... [2020-10-12 16:26:04,539 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:26:04" (1/1) ... [2020-10-12 16:26:04,540 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:26:04" (1/1) ... [2020-10-12 16:26:04,542 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 16:26:04,542 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 16:26:04,542 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 16:26:04,543 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 16:26:04,544 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:26:04" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 16:26:04,613 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 16:26:04,613 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 16:26:04,613 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 16:26:04,613 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2020-10-12 16:26:04,613 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 16:26:04,614 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 16:26:04,614 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 16:26:04,614 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-12 16:26:04,614 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-12 16:26:04,614 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2020-10-12 16:26:04,614 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 16:26:04,615 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 16:26:04,615 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 16:26:04,796 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 16:26:04,796 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-12 16:26:04,800 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 04:26:04 BoogieIcfgContainer [2020-10-12 16:26:04,800 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 16:26:04,802 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 16:26:04,802 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 16:26:04,805 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 16:26:04,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 04:26:04" (1/3) ... [2020-10-12 16:26:04,806 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@274bc6a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 04:26:04, skipping insertion in model container [2020-10-12 16:26:04,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:26:04" (2/3) ... [2020-10-12 16:26:04,807 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@274bc6a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 04:26:04, skipping insertion in model container [2020-10-12 16:26:04,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 04:26:04" (3/3) ... [2020-10-12 16:26:04,809 INFO L109 eAbstractionObserver]: Analyzing ICFG trex02-2.c [2020-10-12 16:26:04,820 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 16:26:04,827 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 16:26:04,841 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 16:26:04,866 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 16:26:04,866 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 16:26:04,867 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 16:26:04,867 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 16:26:04,867 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 16:26:04,867 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 16:26:04,867 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 16:26:04,867 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 16:26:04,884 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-10-12 16:26:04,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-12 16:26:04,889 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:26:04,890 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:26:04,890 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:26:04,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:26:04,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1873481772, now seen corresponding path program 1 times [2020-10-12 16:26:04,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:26:04,905 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [217599681] [2020-10-12 16:26:04,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:26:05,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:26:05,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:05,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:26:05,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-12 16:26:05,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:26:05,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-10-12 16:26:05,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:26:05,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:26:05,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 16:26:05,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:26:05,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 16:26:05,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:26:05,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:26:05,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:05,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:26:05,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:26:05,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:26:05,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 16:26:05,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:26:05,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:26:05,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:26:05,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:26:05,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:26:05,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:26:05,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [217599681] [2020-10-12 16:26:05,128 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 16:26:05,128 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-12 16:26:05,131 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445424196] [2020-10-12 16:26:05,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-12 16:26:05,138 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:26:05,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-12 16:26:05,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-12 16:26:05,151 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2020-10-12 16:26:05,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:26:05,217 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2020-10-12 16:26:05,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-12 16:26:05,220 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-10-12 16:26:05,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:26:05,231 INFO L225 Difference]: With dead ends: 35 [2020-10-12 16:26:05,231 INFO L226 Difference]: Without dead ends: 18 [2020-10-12 16:26:05,235 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-12 16:26:05,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-12 16:26:05,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-12 16:26:05,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-12 16:26:05,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-10-12 16:26:05,293 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 11 [2020-10-12 16:26:05,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:26:05,294 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-10-12 16:26:05,294 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-12 16:26:05,294 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-10-12 16:26:05,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-12 16:26:05,297 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:26:05,298 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:26:05,298 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 16:26:05,299 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:26:05,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:26:05,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1862399520, now seen corresponding path program 1 times [2020-10-12 16:26:05,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:26:05,300 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2030991706] [2020-10-12 16:26:05,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:26:05,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-12 16:26:05,321 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-12 16:26:05,321 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-12 16:26:05,327 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 16:26:05,345 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.10 04:26:05 BoogieIcfgContainer [2020-10-12 16:26:05,346 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-12 16:26:05,350 INFO L168 Benchmark]: Toolchain (without parser) took 1202.90 ms. Allocated memory was 149.9 MB in the beginning and 203.9 MB in the end (delta: 54.0 MB). Free memory was 105.5 MB in the beginning and 141.6 MB in the end (delta: -36.1 MB). Peak memory consumption was 17.9 MB. Max. memory is 7.1 GB. [2020-10-12 16:26:05,351 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 149.9 MB. Free memory was 124.5 MB in the beginning and 124.3 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-10-12 16:26:05,353 INFO L168 Benchmark]: CACSL2BoogieTranslator took 280.05 ms. Allocated memory is still 149.9 MB. Free memory was 105.1 MB in the beginning and 95.7 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-10-12 16:26:05,354 INFO L168 Benchmark]: Boogie Preprocessor took 114.80 ms. Allocated memory was 149.9 MB in the beginning and 203.9 MB in the end (delta: 54.0 MB). Free memory was 95.7 MB in the beginning and 182.2 MB in the end (delta: -86.5 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-10-12 16:26:05,356 INFO L168 Benchmark]: RCFGBuilder took 258.13 ms. Allocated memory is still 203.9 MB. Free memory was 182.2 MB in the beginning and 170.1 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. [2020-10-12 16:26:05,357 INFO L168 Benchmark]: TraceAbstraction took 544.36 ms. Allocated memory is still 203.9 MB. Free memory was 169.5 MB in the beginning and 141.6 MB in the end (delta: 27.9 MB). Peak memory consumption was 27.9 MB. Max. memory is 7.1 GB. [2020-10-12 16:26:05,363 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 149.9 MB. Free memory was 124.5 MB in the beginning and 124.3 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 280.05 ms. Allocated memory is still 149.9 MB. Free memory was 105.1 MB in the beginning and 95.7 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 114.80 ms. Allocated memory was 149.9 MB in the beginning and 203.9 MB in the end (delta: 54.0 MB). Free memory was 95.7 MB in the beginning and 182.2 MB in the end (delta: -86.5 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 258.13 ms. Allocated memory is still 203.9 MB. Free memory was 182.2 MB in the beginning and 170.1 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 544.36 ms. Allocated memory is still 203.9 MB. Free memory was 169.5 MB in the beginning and 141.6 MB in the end (delta: 27.9 MB). Peak memory consumption was 27.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L13] int x; [L20] x=__VERIFIER_nondet_int() [L21] COND FALSE !(x > 0) [L26] CALL __VERIFIER_assert(x==0) [L4] COND TRUE !(cond) [L5] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.4s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 25 SDtfs, 5 SDslu, 10 SDs, 0 SdLazy, 7 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred 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, 0.1s InterpolantComputationTime, 22 NumberOfCodeBlocks, 22 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 10 ConstructedInterpolants, 0 QuantifiedInterpolants, 120 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 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...