/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/count_up_down-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 11:23:40,678 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 11:23:40,682 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 11:23:40,728 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 11:23:40,728 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 11:23:40,736 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 11:23:40,739 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 11:23:40,743 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 11:23:40,746 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 11:23:40,749 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 11:23:40,751 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 11:23:40,752 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 11:23:40,752 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 11:23:40,755 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 11:23:40,759 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 11:23:40,761 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 11:23:40,762 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 11:23:40,764 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 11:23:40,765 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 11:23:40,774 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 11:23:40,777 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 11:23:40,779 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 11:23:40,780 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 11:23:40,781 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 11:23:40,793 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 11:23:40,793 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 11:23:40,793 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 11:23:40,795 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 11:23:40,800 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 11:23:40,802 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 11:23:40,802 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 11:23:40,806 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 11:23:40,807 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 11:23:40,808 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 11:23:40,811 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 11:23:40,811 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 11:23:40,812 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 11:23:40,812 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 11:23:40,812 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 11:23:40,814 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 11:23:40,815 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 11:23:40,816 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 [2020-09-25 11:23:40,862 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 11:23:40,862 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 11:23:40,864 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 11:23:40,865 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 11:23:40,865 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 11:23:40,865 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 11:23:40,866 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 11:23:40,866 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 11:23:40,866 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 11:23:40,866 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 11:23:40,867 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 11:23:40,868 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 11:23:40,868 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 11:23:40,868 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 11:23:40,868 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 11:23:40,869 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 11:23:40,869 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 11:23:40,869 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 11:23:40,869 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 11:23:40,869 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 11:23:40,870 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 11:23:40,870 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 11:23:40,870 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 11:23:40,870 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 11:23:40,871 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 11:23:40,871 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 11:23:40,871 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 11:23:40,871 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 11:23:40,871 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 11:23:40,872 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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; [2020-09-25 11:23:41,448 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 11:23:41,475 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 11:23:41,479 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 11:23:41,481 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 11:23:41,481 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 11:23:41,482 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/count_up_down-2.c [2020-09-25 11:23:41,562 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d39aa7cb8/b7c9f2471e394f95b2b33a70dd7166e8/FLAGde1eee406 [2020-09-25 11:23:42,063 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 11:23:42,064 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/count_up_down-2.c [2020-09-25 11:23:42,072 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d39aa7cb8/b7c9f2471e394f95b2b33a70dd7166e8/FLAGde1eee406 [2020-09-25 11:23:42,408 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d39aa7cb8/b7c9f2471e394f95b2b33a70dd7166e8 [2020-09-25 11:23:42,421 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 11:23:42,426 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 11:23:42,427 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 11:23:42,427 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 11:23:42,433 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 11:23:42,434 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:23:42" (1/1) ... [2020-09-25 11:23:42,438 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a765448 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:23:42, skipping insertion in model container [2020-09-25 11:23:42,438 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:23:42" (1/1) ... [2020-09-25 11:23:42,447 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 11:23:42,471 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 11:23:42,682 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 11:23:42,688 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 11:23:42,708 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 11:23:42,728 INFO L208 MainTranslator]: Completed translation [2020-09-25 11:23:42,729 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:23:42 WrapperNode [2020-09-25 11:23:42,729 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 11:23:42,730 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 11:23:42,730 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 11:23:42,731 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 11:23:42,749 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:23:42" (1/1) ... [2020-09-25 11:23:42,749 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:23:42" (1/1) ... [2020-09-25 11:23:42,756 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:23:42" (1/1) ... [2020-09-25 11:23:42,756 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:23:42" (1/1) ... [2020-09-25 11:23:42,760 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:23:42" (1/1) ... [2020-09-25 11:23:42,767 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:23:42" (1/1) ... [2020-09-25 11:23:42,768 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:23:42" (1/1) ... [2020-09-25 11:23:42,870 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 11:23:42,871 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 11:23:42,871 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 11:23:42,871 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 11:23:42,873 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:23:42" (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 [2020-09-25 11:23:42,975 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 11:23:42,976 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 11:23:42,976 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 11:23:42,976 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 11:23:42,976 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 11:23:42,976 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 11:23:42,977 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-25 11:23:42,977 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 11:23:42,977 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 11:23:42,977 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 11:23:43,183 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 11:23:43,184 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 11:23:43,189 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:23:43 BoogieIcfgContainer [2020-09-25 11:23:43,189 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 11:23:43,190 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 11:23:43,191 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 11:23:43,194 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 11:23:43,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 11:23:42" (1/3) ... [2020-09-25 11:23:43,196 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1567200b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:23:43, skipping insertion in model container [2020-09-25 11:23:43,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:23:42" (2/3) ... [2020-09-25 11:23:43,197 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1567200b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:23:43, skipping insertion in model container [2020-09-25 11:23:43,197 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:23:43" (3/3) ... [2020-09-25 11:23:43,200 INFO L109 eAbstractionObserver]: Analyzing ICFG count_up_down-2.c [2020-09-25 11:23:43,212 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 11:23:43,223 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 11:23:43,262 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 11:23:43,322 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 11:23:43,323 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 11:23:43,323 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 11:23:43,323 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 11:23:43,323 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 11:23:43,324 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 11:23:43,324 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 11:23:43,324 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 11:23:43,350 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-09-25 11:23:43,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-25 11:23:43,362 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:23:43,366 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:23:43,366 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:23:43,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:23:43,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1049095342, now seen corresponding path program 1 times [2020-09-25 11:23:43,389 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:23:43,389 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [271591088] [2020-09-25 11:23:43,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:23:43,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:23:43,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:43,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:23:43,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-25 11:23:43,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:23:43,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-09-25 11:23:43,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:23:43,536 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:23:43,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:23:43,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 11:23:43,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:23:43,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 11:23:43,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:23:43,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:23:43,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:43,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:23:43,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:23:43,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:23:43,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 11:23:43,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:23:43,574 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:23:43,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:23:43,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:23:43,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:23:43,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:23:43,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:23:43,587 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [271591088] [2020-09-25 11:23:43,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 11:23:43,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-25 11:23:43,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322345528] [2020-09-25 11:23:43,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-25 11:23:43,598 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:23:43,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-25 11:23:43,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-25 11:23:43,620 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 2 states. [2020-09-25 11:23:43,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:23:43,651 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2020-09-25 11:23:43,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-25 11:23:43,653 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 13 [2020-09-25 11:23:43,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:23:43,665 INFO L225 Difference]: With dead ends: 37 [2020-09-25 11:23:43,665 INFO L226 Difference]: Without dead ends: 20 [2020-09-25 11:23:43,669 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-25 11:23:43,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-09-25 11:23:43,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-09-25 11:23:43,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-09-25 11:23:43,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-09-25 11:23:43,717 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 13 [2020-09-25 11:23:43,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:23:43,717 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-09-25 11:23:43,717 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-25 11:23:43,717 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-09-25 11:23:43,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-25 11:23:43,718 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:23:43,718 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:23:43,719 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 11:23:43,719 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:23:43,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:23:43,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1039860132, now seen corresponding path program 1 times [2020-09-25 11:23:43,720 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:23:43,720 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1057847722] [2020-09-25 11:23:43,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:23:43,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 11:23:43,758 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 11:23:43,759 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 11:23:43,765 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 11:23:43,782 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 11:23:43 BoogieIcfgContainer [2020-09-25 11:23:43,783 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 11:23:43,786 INFO L168 Benchmark]: Toolchain (without parser) took 1361.72 ms. Allocated memory was 140.0 MB in the beginning and 203.9 MB in the end (delta: 64.0 MB). Free memory was 102.0 MB in the beginning and 146.1 MB in the end (delta: -44.1 MB). Peak memory consumption was 19.9 MB. Max. memory is 7.1 GB. [2020-09-25 11:23:43,787 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 140.0 MB. Free memory was 120.3 MB in the beginning and 120.0 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-25 11:23:43,788 INFO L168 Benchmark]: CACSL2BoogieTranslator took 302.75 ms. Allocated memory is still 140.0 MB. Free memory was 101.4 MB in the beginning and 92.0 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-09-25 11:23:43,789 INFO L168 Benchmark]: Boogie Preprocessor took 140.54 ms. Allocated memory was 140.0 MB in the beginning and 203.9 MB in the end (delta: 64.0 MB). Free memory was 92.0 MB in the beginning and 184.0 MB in the end (delta: -91.9 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. [2020-09-25 11:23:43,790 INFO L168 Benchmark]: RCFGBuilder took 318.21 ms. Allocated memory is still 203.9 MB. Free memory was 184.0 MB in the beginning and 171.1 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2020-09-25 11:23:43,792 INFO L168 Benchmark]: TraceAbstraction took 592.44 ms. Allocated memory is still 203.9 MB. Free memory was 170.5 MB in the beginning and 146.1 MB in the end (delta: 24.4 MB). Peak memory consumption was 24.4 MB. Max. memory is 7.1 GB. [2020-09-25 11:23:43,796 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 140.0 MB. Free memory was 120.3 MB in the beginning and 120.0 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 302.75 ms. Allocated memory is still 140.0 MB. Free memory was 101.4 MB in the beginning and 92.0 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 140.54 ms. Allocated memory was 140.0 MB in the beginning and 203.9 MB in the end (delta: 64.0 MB). Free memory was 92.0 MB in the beginning and 184.0 MB in the end (delta: -91.9 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 318.21 ms. Allocated memory is still 203.9 MB. Free memory was 184.0 MB in the beginning and 171.1 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 592.44 ms. Allocated memory is still 203.9 MB. Free memory was 170.5 MB in the beginning and 146.1 MB in the end (delta: 24.4 MB). Peak memory consumption was 24.4 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] unsigned int n = __VERIFIER_nondet_uint(); [L14] unsigned int x=n, y=0; [L15] COND FALSE !(x>0) [L20] CALL __VERIFIER_assert(y!=n) [L4] COND TRUE !(cond) [L5] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 26 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: 26 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred 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, 0.0s InterpolantComputationTime, 26 NumberOfCodeBlocks, 26 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 12 ConstructedInterpolants, 0 QuantifiedInterpolants, 144 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...