/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=1000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/condnf.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 19:32:58,649 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 19:32:58,653 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 19:32:58,680 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 19:32:58,680 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 19:32:58,682 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 19:32:58,683 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 19:32:58,685 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 19:32:58,687 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 19:32:58,689 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 19:32:58,690 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 19:32:58,691 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 19:32:58,691 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 19:32:58,693 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 19:32:58,694 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 19:32:58,695 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 19:32:58,697 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 19:32:58,699 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 19:32:58,701 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 19:32:58,703 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 19:32:58,705 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 19:32:58,706 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 19:32:58,708 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 19:32:58,709 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 19:32:58,712 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 19:32:58,712 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 19:32:58,712 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 19:32:58,713 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 19:32:58,714 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 19:32:58,715 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 19:32:58,715 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 19:32:58,716 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 19:32:58,717 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 19:32:58,718 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 19:32:58,720 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 19:32:58,720 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 19:32:58,721 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 19:32:58,721 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 19:32:58,721 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 19:32:58,723 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 19:32:58,724 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 19:32:58,725 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-24 19:32:58,752 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 19:32:58,752 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 19:32:58,754 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 19:32:58,754 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 19:32:58,754 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 19:32:58,755 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 19:32:58,755 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 19:32:58,755 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 19:32:58,755 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 19:32:58,755 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 19:32:58,756 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 19:32:58,756 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 19:32:58,756 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 19:32:58,756 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 19:32:58,756 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 19:32:58,757 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 19:32:58,757 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 19:32:58,757 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 19:32:58,757 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 19:32:58,758 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 19:32:58,758 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 19:32:58,758 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 19:32:58,758 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 19:32:58,759 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 19:32:58,759 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 19:32:58,759 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 19:32:58,759 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 19:32:58,759 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 19:32:58,760 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 19:32:58,760 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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-09-24 19:32:59,242 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 19:32:59,269 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 19:32:59,275 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 19:32:59,280 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 19:32:59,280 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 19:32:59,282 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/condnf.c [2020-09-24 19:32:59,348 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fb2f0d375/ab9b8df424624360b9c310248c77fc2f/FLAGcb0c20ba3 [2020-09-24 19:32:59,925 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 19:32:59,926 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/condnf.c [2020-09-24 19:32:59,936 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fb2f0d375/ab9b8df424624360b9c310248c77fc2f/FLAGcb0c20ba3 [2020-09-24 19:33:00,254 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fb2f0d375/ab9b8df424624360b9c310248c77fc2f [2020-09-24 19:33:00,268 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 19:33:00,275 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 19:33:00,276 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 19:33:00,276 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 19:33:00,281 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 19:33:00,282 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 07:33:00" (1/1) ... [2020-09-24 19:33:00,287 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@788ef5e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:33:00, skipping insertion in model container [2020-09-24 19:33:00,287 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 07:33:00" (1/1) ... [2020-09-24 19:33:00,297 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 19:33:00,327 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 19:33:00,614 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 19:33:00,630 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 19:33:00,655 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 19:33:00,675 INFO L208 MainTranslator]: Completed translation [2020-09-24 19:33:00,676 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:33:00 WrapperNode [2020-09-24 19:33:00,676 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 19:33:00,677 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 19:33:00,677 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 19:33:00,677 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 19:33:00,790 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:33:00" (1/1) ... [2020-09-24 19:33:00,791 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:33:00" (1/1) ... [2020-09-24 19:33:00,802 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:33:00" (1/1) ... [2020-09-24 19:33:00,803 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:33:00" (1/1) ... [2020-09-24 19:33:00,812 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:33:00" (1/1) ... [2020-09-24 19:33:00,819 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:33:00" (1/1) ... [2020-09-24 19:33:00,820 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:33:00" (1/1) ... [2020-09-24 19:33:00,823 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 19:33:00,823 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 19:33:00,824 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 19:33:00,824 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 19:33:00,825 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:33:00" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 19:33:00,919 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 19:33:00,920 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 19:33:00,920 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-24 19:33:00,920 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 19:33:00,921 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 19:33:00,921 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 19:33:00,921 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 19:33:00,921 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-24 19:33:00,922 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 19:33:00,922 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 19:33:00,922 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-24 19:33:00,922 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 19:33:00,922 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-24 19:33:00,922 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-24 19:33:00,922 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-24 19:33:00,923 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 19:33:00,923 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 19:33:00,923 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 19:33:01,278 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 19:33:01,279 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-24 19:33:01,288 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 07:33:01 BoogieIcfgContainer [2020-09-24 19:33:01,289 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 19:33:01,290 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 19:33:01,290 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 19:33:01,294 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 19:33:01,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 07:33:00" (1/3) ... [2020-09-24 19:33:01,295 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7954f508 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 07:33:01, skipping insertion in model container [2020-09-24 19:33:01,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:33:00" (2/3) ... [2020-09-24 19:33:01,296 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7954f508 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 07:33:01, skipping insertion in model container [2020-09-24 19:33:01,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 07:33:01" (3/3) ... [2020-09-24 19:33:01,299 INFO L109 eAbstractionObserver]: Analyzing ICFG condnf.c [2020-09-24 19:33:01,312 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 19:33:01,323 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 19:33:01,344 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 19:33:01,374 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 19:33:01,374 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 19:33:01,374 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 19:33:01,375 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 19:33:01,375 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 19:33:01,375 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 19:33:01,375 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 19:33:01,375 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 19:33:01,400 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states. [2020-09-24 19:33:01,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-24 19:33:01,409 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:33:01,410 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:33:01,411 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:33:01,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:33:01,418 INFO L82 PathProgramCache]: Analyzing trace with hash -386984160, now seen corresponding path program 1 times [2020-09-24 19:33:01,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:33:01,428 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1576601836] [2020-09-24 19:33:01,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:33:01,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:01,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:01,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:01,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:01,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-09-24 19:33:01,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 19:33:01,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 242 [2020-09-24 19:33:01,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:01,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:33:01,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-09-24 19:33:01,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:33:01,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 19:33:01,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:33:01,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:01,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:01,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:01,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 19:33:01,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:33:01,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-24 19:33:01,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:01,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:33:01,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:33:01,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:33:01,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:33:01,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 19:33:01,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:01,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:01,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:01,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 19:33:01,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:33:01,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 19:33:01,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:01,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:33:01,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:33:01,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:33:01,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:33:01,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:33:01,976 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1576601836] [2020-09-24 19:33:01,978 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:33:01,979 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 19:33:01,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562625976] [2020-09-24 19:33:01,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 19:33:01,987 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:33:02,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 19:33:02,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 19:33:02,010 INFO L87 Difference]: Start difference. First operand 62 states. Second operand 3 states. [2020-09-24 19:33:02,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:33:02,201 INFO L93 Difference]: Finished difference Result 107 states and 124 transitions. [2020-09-24 19:33:02,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 19:33:02,203 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-09-24 19:33:02,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:33:02,215 INFO L225 Difference]: With dead ends: 107 [2020-09-24 19:33:02,215 INFO L226 Difference]: Without dead ends: 55 [2020-09-24 19:33:02,220 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 19:33:02,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-24 19:33:02,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-09-24 19:33:02,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-24 19:33:02,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2020-09-24 19:33:02,274 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 31 [2020-09-24 19:33:02,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:33:02,275 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2020-09-24 19:33:02,275 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 19:33:02,275 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2020-09-24 19:33:02,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-24 19:33:02,277 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:33:02,277 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:33:02,277 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 19:33:02,278 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:33:02,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:33:02,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1278196063, now seen corresponding path program 1 times [2020-09-24 19:33:02,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:33:02,279 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [288675280] [2020-09-24 19:33:02,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:33:02,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:02,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:02,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:02,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:02,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:03,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:03,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-09-24 19:33:03,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 19:33:03,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 747 [2020-09-24 19:33:03,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:03,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 19:33:03,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 19:33:03,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-24 19:33:03,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:33:03,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:33:03,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:03,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:03,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:03,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 19:33:03,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:33:03,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 19:33:03,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:03,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:33:03,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:33:03,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:33:03,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:33:03,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 19:33:03,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:03,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:03,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:03,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 19:33:03,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:33:03,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-24 19:33:03,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:03,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 19:33:03,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:33:03,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 19:33:03,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:33:03,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:33:03,139 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [288675280] [2020-09-24 19:33:03,140 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:33:03,140 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 19:33:03,140 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210754665] [2020-09-24 19:33:03,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 19:33:03,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:33:03,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 19:33:03,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 19:33:03,144 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand 5 states. [2020-09-24 19:33:03,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:33:03,400 INFO L93 Difference]: Finished difference Result 85 states and 92 transitions. [2020-09-24 19:33:03,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 19:33:03,401 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2020-09-24 19:33:03,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:33:03,403 INFO L225 Difference]: With dead ends: 85 [2020-09-24 19:33:03,404 INFO L226 Difference]: Without dead ends: 58 [2020-09-24 19:33:03,406 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-24 19:33:03,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-09-24 19:33:03,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-09-24 19:33:03,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-24 19:33:03,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2020-09-24 19:33:03,432 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 31 [2020-09-24 19:33:03,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:33:03,432 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2020-09-24 19:33:03,432 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 19:33:03,432 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2020-09-24 19:33:03,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-09-24 19:33:03,435 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:33:03,436 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:33:03,436 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 19:33:03,436 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:33:03,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:33:03,437 INFO L82 PathProgramCache]: Analyzing trace with hash -620119431, now seen corresponding path program 1 times [2020-09-24 19:33:03,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:33:03,437 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1424252241] [2020-09-24 19:33:03,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:33:03,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:03,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:03,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:04,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:04,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:04,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:04,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-09-24 19:33:04,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 19:33:04,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1078 [2020-09-24 19:33:04,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:04,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 19:33:04,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-09-24 19:33:04,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 19:33:04,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:33:04,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:33:04,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:04,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:04,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:04,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 19:33:04,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:33:04,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 19:33:04,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:04,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:33:04,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:33:04,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:33:04,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:33:04,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 19:33:04,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:04,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:04,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:04,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 19:33:04,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:33:04,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 19:33:04,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:04,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:33:04,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:33:04,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:33:04,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:33:04,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 19:33:04,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1424252241] [2020-09-24 19:33:04,721 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:33:04,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 19:33:04,722 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380734083] [2020-09-24 19:33:04,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 19:33:04,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:33:04,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 19:33:04,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-09-24 19:33:04,725 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand 9 states. [2020-09-24 19:33:05,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:33:05,202 INFO L93 Difference]: Finished difference Result 113 states and 121 transitions. [2020-09-24 19:33:05,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-24 19:33:05,203 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 46 [2020-09-24 19:33:05,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:33:05,210 INFO L225 Difference]: With dead ends: 113 [2020-09-24 19:33:05,210 INFO L226 Difference]: Without dead ends: 111 [2020-09-24 19:33:05,211 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-09-24 19:33:05,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-24 19:33:05,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 73. [2020-09-24 19:33:05,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-24 19:33:05,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 78 transitions. [2020-09-24 19:33:05,247 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 78 transitions. Word has length 46 [2020-09-24 19:33:05,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:33:05,248 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 78 transitions. [2020-09-24 19:33:05,248 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 19:33:05,248 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 78 transitions. [2020-09-24 19:33:05,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-24 19:33:05,252 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:33:05,253 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:33:05,253 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 19:33:05,253 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:33:05,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:33:05,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1321326334, now seen corresponding path program 1 times [2020-09-24 19:33:05,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:33:05,256 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1705825026] [2020-09-24 19:33:05,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:33:05,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-24 19:33:05,292 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-24 19:33:05,293 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 19:33:05,298 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 19:33:05,334 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 07:33:05 BoogieIcfgContainer [2020-09-24 19:33:05,334 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 19:33:05,338 INFO L168 Benchmark]: Toolchain (without parser) took 5066.14 ms. Allocated memory was 138.4 MB in the beginning and 246.9 MB in the end (delta: 108.5 MB). Free memory was 101.2 MB in the beginning and 139.5 MB in the end (delta: -38.3 MB). Peak memory consumption was 70.2 MB. Max. memory is 7.1 GB. [2020-09-24 19:33:05,340 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-24 19:33:05,341 INFO L168 Benchmark]: CACSL2BoogieTranslator took 400.78 ms. Allocated memory is still 138.4 MB. Free memory was 100.5 MB in the beginning and 90.4 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. [2020-09-24 19:33:05,343 INFO L168 Benchmark]: Boogie Preprocessor took 145.93 ms. Allocated memory was 138.4 MB in the beginning and 201.9 MB in the end (delta: 63.4 MB). Free memory was 90.4 MB in the beginning and 179.0 MB in the end (delta: -88.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. [2020-09-24 19:33:05,345 INFO L168 Benchmark]: RCFGBuilder took 465.30 ms. Allocated memory is still 201.9 MB. Free memory was 179.0 MB in the beginning and 160.1 MB in the end (delta: 18.9 MB). Peak memory consumption was 18.9 MB. Max. memory is 7.1 GB. [2020-09-24 19:33:05,351 INFO L168 Benchmark]: TraceAbstraction took 4044.16 ms. Allocated memory was 201.9 MB in the beginning and 246.9 MB in the end (delta: 45.1 MB). Free memory was 160.1 MB in the beginning and 139.5 MB in the end (delta: 20.6 MB). Peak memory consumption was 65.7 MB. Max. memory is 7.1 GB. [2020-09-24 19:33:05,362 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 400.78 ms. Allocated memory is still 138.4 MB. Free memory was 100.5 MB in the beginning and 90.4 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 145.93 ms. Allocated memory was 138.4 MB in the beginning and 201.9 MB in the end (delta: 63.4 MB). Free memory was 90.4 MB in the beginning and 179.0 MB in the end (delta: -88.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 465.30 ms. Allocated memory is still 201.9 MB. Free memory was 179.0 MB in the beginning and 160.1 MB in the end (delta: 18.9 MB). Peak memory consumption was 18.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4044.16 ms. Allocated memory was 201.9 MB in the beginning and 246.9 MB in the end (delta: 45.1 MB). Free memory was 160.1 MB in the beginning and 139.5 MB in the end (delta: 20.6 MB). Peak memory consumption was 65.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L17] int N; [L21] N = __VERIFIER_nondet_int() [L22] COND FALSE !(N <= 0) [L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) [L11] COND FALSE !(!cond) [L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) [L25] int i; [L26] int *a = malloc(sizeof(int)*N); [L28] i=0 [L28] COND TRUE i N [L36] EXPR a[i] [L36] a[i] = a[i] [L33] i++ [L33] COND FALSE !(i