/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --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 language data_model -i ../../../trunk/examples/svcomp/loops/trex02-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 15:19:09,689 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 15:19:09,692 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 15:19:09,749 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 15:19:09,750 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 15:19:09,757 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 15:19:09,759 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 15:19:09,765 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 15:19:09,769 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 15:19:09,775 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 15:19:09,777 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 15:19:09,778 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 15:19:09,778 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 15:19:09,782 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 15:19:09,784 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 15:19:09,787 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 15:19:09,788 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 15:19:09,792 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 15:19:09,821 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 15:19:09,830 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 15:19:09,832 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 15:19:09,834 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 15:19:09,836 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 15:19:09,839 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 15:19:09,844 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 15:19:09,844 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 15:19:09,844 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 15:19:09,846 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 15:19:09,846 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 15:19:09,847 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 15:19:09,848 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 15:19:09,849 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 15:19:09,850 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 15:19:09,851 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 15:19:09,852 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 15:19:09,852 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 15:19:09,853 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 15:19:09,854 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 15:19:09,854 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 15:19:09,855 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 15:19:09,856 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 15:19:09,857 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 [2020-10-28 15:19:09,885 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 15:19:09,886 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 15:19:09,888 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 15:19:09,890 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 15:19:09,891 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 15:19:09,891 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 15:19:09,891 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 15:19:09,892 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 15:19:09,892 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 15:19:09,892 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 15:19:09,892 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 15:19:09,893 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 15:19:09,893 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 15:19:09,893 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 15:19:09,893 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 15:19:09,893 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 15:19:09,894 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 15:19:09,895 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 15:19:09,895 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 15:19:09,895 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 15:19:09,896 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 15:19:09,896 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 15:19:09,896 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 15:19:09,897 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 15:19:09,897 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 15:19:09,897 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 15:19:09,898 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 15:19:09,898 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 15:19:09,898 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 15:19:09,898 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 15:19:10,418 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 15:19:10,462 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 15:19:10,465 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 15:19:10,467 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 15:19:10,467 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 15:19:10,468 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/trex02-2.c [2020-10-28 15:19:10,540 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/334b85d23/e6ab3a7eeb774b208494cbcc961c2b0b/FLAGdcbeb1a75 [2020-10-28 15:19:11,102 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 15:19:11,103 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/trex02-2.c [2020-10-28 15:19:11,110 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/334b85d23/e6ab3a7eeb774b208494cbcc961c2b0b/FLAGdcbeb1a75 [2020-10-28 15:19:11,475 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/334b85d23/e6ab3a7eeb774b208494cbcc961c2b0b [2020-10-28 15:19:11,478 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 15:19:11,485 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 15:19:11,487 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 15:19:11,487 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 15:19:11,491 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 15:19:11,492 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 03:19:11" (1/1) ... [2020-10-28 15:19:11,495 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ce955ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:19:11, skipping insertion in model container [2020-10-28 15:19:11,495 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 03:19:11" (1/1) ... [2020-10-28 15:19:11,503 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 15:19:11,517 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 15:19:11,677 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 15:19:11,692 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 15:19:11,707 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 15:19:11,722 INFO L208 MainTranslator]: Completed translation [2020-10-28 15:19:11,723 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:19:11 WrapperNode [2020-10-28 15:19:11,723 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 15:19:11,724 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 15:19:11,724 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 15:19:11,725 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 15:19:11,735 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:19:11" (1/1) ... [2020-10-28 15:19:11,736 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:19:11" (1/1) ... [2020-10-28 15:19:11,742 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:19:11" (1/1) ... [2020-10-28 15:19:11,743 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:19:11" (1/1) ... [2020-10-28 15:19:11,747 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:19:11" (1/1) ... [2020-10-28 15:19:11,751 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:19:11" (1/1) ... [2020-10-28 15:19:11,753 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:19:11" (1/1) ... [2020-10-28 15:19:11,754 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 15:19:11,755 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 15:19:11,755 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 15:19:11,756 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 15:19:11,756 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:19:11" (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 [2020-10-28 15:19:11,821 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 15:19:11,822 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 15:19:11,822 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 15:19:11,822 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 15:19:11,822 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2020-10-28 15:19:11,823 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 15:19:11,823 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 15:19:11,823 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 15:19:11,823 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 15:19:11,823 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 15:19:11,823 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 15:19:11,824 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 15:19:11,824 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 15:19:11,824 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2020-10-28 15:19:11,824 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 15:19:11,824 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 15:19:11,825 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 15:19:11,825 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 15:19:11,825 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 15:19:11,825 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 15:19:11,825 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 15:19:12,064 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 15:19:12,065 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 15:19:12,066 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 03:19:12 BoogieIcfgContainer [2020-10-28 15:19:12,067 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 15:19:12,069 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 15:19:12,069 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 15:19:12,072 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 15:19:12,073 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 03:19:11" (1/3) ... [2020-10-28 15:19:12,074 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e3f8920 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 03:19:12, skipping insertion in model container [2020-10-28 15:19:12,074 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:19:11" (2/3) ... [2020-10-28 15:19:12,074 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e3f8920 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 03:19:12, skipping insertion in model container [2020-10-28 15:19:12,074 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 03:19:12" (3/3) ... [2020-10-28 15:19:12,076 INFO L111 eAbstractionObserver]: Analyzing ICFG trex02-2.c [2020-10-28 15:19:12,104 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 15:19:12,118 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 15:19:12,155 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 15:19:12,187 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 15:19:12,187 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 15:19:12,188 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 15:19:12,188 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 15:19:12,188 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 15:19:12,188 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 15:19:12,188 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 15:19:12,189 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 15:19:12,214 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-10-28 15:19:12,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-28 15:19:12,223 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:19:12,224 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:19:12,225 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:19:12,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:19:12,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1007769719, now seen corresponding path program 1 times [2020-10-28 15:19:12,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:19:12,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [438589278] [2020-10-28 15:19:12,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:19:12,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:19:12,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:12,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:19:12,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-28 15:19:12,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:19:12,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 111 [2020-10-28 15:19:12,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:19:12,600 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:19:12,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:19:12,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:19:12,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:19:12,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 15:19:12,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:19:12,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:19:12,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:12,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:19:12,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:19:12,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:19:12,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 15:19:12,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:19:12,722 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:19:12,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:19:12,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:19:12,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:19:12,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:19:12,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:19:12,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [438589278] [2020-10-28 15:19:12,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:19:12,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 15:19:12,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2844373] [2020-10-28 15:19:12,748 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 15:19:12,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:19:12,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 15:19:12,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 15:19:12,768 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 3 states. [2020-10-28 15:19:12,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:19:12,856 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-10-28 15:19:12,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 15:19:12,858 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-28 15:19:12,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:19:12,868 INFO L225 Difference]: With dead ends: 40 [2020-10-28 15:19:12,868 INFO L226 Difference]: Without dead ends: 19 [2020-10-28 15:19:12,872 INFO L677 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 [2020-10-28 15:19:12,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-28 15:19:12,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-28 15:19:12,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-28 15:19:12,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-10-28 15:19:12,923 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2020-10-28 15:19:12,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:19:12,924 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-10-28 15:19:12,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 15:19:12,924 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-10-28 15:19:12,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-28 15:19:12,925 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:19:12,925 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:19:12,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 15:19:12,926 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:19:12,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:19:12,927 INFO L82 PathProgramCache]: Analyzing trace with hash 664219907, now seen corresponding path program 1 times [2020-10-28 15:19:12,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:19:12,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1412541874] [2020-10-28 15:19:12,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:19:12,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-28 15:19:12,978 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-28 15:19:12,979 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-28 15:19:12,985 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 15:19:13,001 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 03:19:13 BoogieIcfgContainer [2020-10-28 15:19:13,001 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-28 15:19:13,005 INFO L168 Benchmark]: Toolchain (without parser) took 1522.99 ms. Allocated memory is still 158.3 MB. Free memory was 133.3 MB in the beginning and 105.0 MB in the end (delta: 28.3 MB). Peak memory consumption was 28.8 MB. Max. memory is 8.0 GB. [2020-10-28 15:19:13,008 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 158.3 MB. Free memory was 130.1 MB in the beginning and 130.0 MB in the end (delta: 118.6 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-28 15:19:13,010 INFO L168 Benchmark]: CACSL2BoogieTranslator took 236.35 ms. Allocated memory is still 158.3 MB. Free memory was 132.6 MB in the beginning and 123.7 MB in the end (delta: 9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2020-10-28 15:19:13,012 INFO L168 Benchmark]: Boogie Preprocessor took 30.41 ms. Allocated memory is still 158.3 MB. Free memory was 123.5 MB in the beginning and 122.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-28 15:19:13,013 INFO L168 Benchmark]: RCFGBuilder took 311.56 ms. Allocated memory is still 158.3 MB. Free memory was 122.1 MB in the beginning and 108.8 MB in the end (delta: 13.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-10-28 15:19:13,015 INFO L168 Benchmark]: TraceAbstraction took 933.06 ms. Allocated memory is still 158.3 MB. Free memory was 108.3 MB in the beginning and 105.0 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.7 MB. Max. memory is 8.0 GB. [2020-10-28 15:19:13,026 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 158.3 MB. Free memory was 130.1 MB in the beginning and 130.0 MB in the end (delta: 118.6 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 236.35 ms. Allocated memory is still 158.3 MB. Free memory was 132.6 MB in the beginning and 123.7 MB in the end (delta: 9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 30.41 ms. Allocated memory is still 158.3 MB. Free memory was 123.5 MB in the beginning and 122.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 311.56 ms. Allocated memory is still 158.3 MB. Free memory was 122.1 MB in the beginning and 108.8 MB in the end (delta: 13.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 933.06 ms. Allocated memory is still 158.3 MB. Free memory was 108.3 MB in the beginning and 105.0 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L15] int x; [L22] x=__VERIFIER_nondet_int() [L23] COND FALSE !(x > 0) [L28] CALL __VERIFIER_assert(x==0) [L6] COND TRUE !(cond) [L7] CALL reach_error() [L3] __assert_fail("0", "trex02-2.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.8s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 25 SDtfs, 5 SDslu, 6 SDs, 0 SdLazy, 12 SolverSat, 5 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=28occurred 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, 0.2s InterpolantComputationTime, 24 NumberOfCodeBlocks, 24 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 11 ConstructedInterpolants, 0 QuantifiedInterpolants, 484 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...