/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=DEEPEST --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/recursive-simple/id_b3_o2-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 22:37:26,776 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 22:37:26,779 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 22:37:26,813 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 22:37:26,814 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 22:37:26,815 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 22:37:26,817 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 22:37:26,819 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 22:37:26,822 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 22:37:26,823 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 22:37:26,824 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 22:37:26,826 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 22:37:26,826 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 22:37:26,827 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 22:37:26,829 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 22:37:26,830 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 22:37:26,834 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 22:37:26,835 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 22:37:26,837 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 22:37:26,842 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 22:37:26,868 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 22:37:26,872 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 22:37:26,874 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 22:37:26,875 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 22:37:26,899 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 22:37:26,899 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 22:37:26,899 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 22:37:26,901 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 22:37:26,904 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 22:37:26,906 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 22:37:26,906 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 22:37:26,907 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 22:37:26,909 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 22:37:26,910 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 22:37:26,911 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 22:37:26,911 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 22:37:26,912 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 22:37:26,912 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 22:37:26,912 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 22:37:26,913 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 22:37:26,914 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 22:37:26,916 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 [2020-10-27 22:37:26,973 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 22:37:26,974 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 22:37:26,979 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 22:37:26,979 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 22:37:26,979 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 22:37:26,980 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 22:37:26,980 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 22:37:26,980 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 22:37:26,981 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 22:37:26,981 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 22:37:26,982 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 22:37:26,982 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 22:37:26,983 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 22:37:26,983 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 22:37:26,983 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 22:37:26,983 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 22:37:26,984 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 22:37:26,984 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 22:37:26,985 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 22:37:26,985 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 22:37:26,985 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 22:37:26,986 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 22:37:26,986 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 22:37:26,987 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 22:37:26,987 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 22:37:26,987 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 22:37:26,987 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 22:37:26,988 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 22:37:26,988 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 22:37:26,988 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 22:37:27,436 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 22:37:27,462 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 22:37:27,465 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 22:37:27,467 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 22:37:27,469 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 22:37:27,470 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_b3_o2-2.c [2020-10-27 22:37:27,541 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fa08dcd4c/e6992877169a41b891f5e4d0caba5070/FLAG5a90ab218 [2020-10-27 22:37:28,063 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 22:37:28,064 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id_b3_o2-2.c [2020-10-27 22:37:28,070 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fa08dcd4c/e6992877169a41b891f5e4d0caba5070/FLAG5a90ab218 [2020-10-27 22:37:28,419 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fa08dcd4c/e6992877169a41b891f5e4d0caba5070 [2020-10-27 22:37:28,422 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 22:37:28,433 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 22:37:28,437 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 22:37:28,438 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 22:37:28,443 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 22:37:28,444 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 10:37:28" (1/1) ... [2020-10-27 22:37:28,452 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2915e874 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:37:28, skipping insertion in model container [2020-10-27 22:37:28,452 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 10:37:28" (1/1) ... [2020-10-27 22:37:28,480 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 22:37:28,493 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 22:37:28,632 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 22:37:28,643 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 22:37:28,660 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 22:37:28,677 INFO L208 MainTranslator]: Completed translation [2020-10-27 22:37:28,678 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:37:28 WrapperNode [2020-10-27 22:37:28,678 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 22:37:28,679 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 22:37:28,679 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 22:37:28,679 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 22:37:28,692 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:37:28" (1/1) ... [2020-10-27 22:37:28,693 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:37:28" (1/1) ... [2020-10-27 22:37:28,701 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:37:28" (1/1) ... [2020-10-27 22:37:28,702 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:37:28" (1/1) ... [2020-10-27 22:37:28,708 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:37:28" (1/1) ... [2020-10-27 22:37:28,709 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:37:28" (1/1) ... [2020-10-27 22:37:28,710 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:37:28" (1/1) ... [2020-10-27 22:37:28,712 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 22:37:28,713 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 22:37:28,714 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 22:37:28,714 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 22:37:28,715 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:37:28" (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 [2020-10-27 22:37:28,849 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 22:37:28,850 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 22:37:28,850 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 22:37:28,851 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-10-27 22:37:28,851 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 22:37:28,851 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 22:37:28,852 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 22:37:28,852 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 22:37:28,852 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 22:37:28,852 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 22:37:28,853 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-10-27 22:37:28,854 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 22:37:28,854 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 22:37:28,854 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 22:37:28,854 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 22:37:28,856 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 22:37:28,856 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 22:37:28,856 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 22:37:29,241 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 22:37:29,242 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 22:37:29,243 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 10:37:29 BoogieIcfgContainer [2020-10-27 22:37:29,244 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 22:37:29,245 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 22:37:29,245 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 22:37:29,249 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 22:37:29,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 10:37:28" (1/3) ... [2020-10-27 22:37:29,250 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@754707ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 10:37:29, skipping insertion in model container [2020-10-27 22:37:29,251 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:37:28" (2/3) ... [2020-10-27 22:37:29,251 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@754707ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 10:37:29, skipping insertion in model container [2020-10-27 22:37:29,251 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 10:37:29" (3/3) ... [2020-10-27 22:37:29,253 INFO L111 eAbstractionObserver]: Analyzing ICFG id_b3_o2-2.c [2020-10-27 22:37:29,266 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 22:37:29,271 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 22:37:29,286 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 22:37:29,319 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 22:37:29,319 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 22:37:29,320 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 22:37:29,320 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 22:37:29,320 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 22:37:29,320 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 22:37:29,320 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 22:37:29,320 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 22:37:29,355 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-10-27 22:37:29,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-27 22:37:29,365 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:37:29,371 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 22:37:29,372 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:37:29,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:37:29,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1397195593, now seen corresponding path program 1 times [2020-10-27 22:37:29,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:37:29,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1039782332] [2020-10-27 22:37:29,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:37:29,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:37:29,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:37:29,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:37:29,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 22:37:29,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:37:29,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 270 [2020-10-27 22:37:29,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:37:29,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 22:37:29,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 22:37:29,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 22:37:29,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-27 22:37:29,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:37:29,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:37:29,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:37:29,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:37:29,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:37:29,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:37:29,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 22:37:29,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:37:29,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:37:29,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:37:29,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:37:29,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:37:29,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 22:37:29,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:37:29,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:37:30,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:37:30,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 22:37:30,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:37:30,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 22:37:30,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:37:30,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 22:37:30,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:37:30,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 22:37:30,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:37:30,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 22:37:30,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1039782332] [2020-10-27 22:37:30,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 22:37:30,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 22:37:30,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260987831] [2020-10-27 22:37:30,043 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 22:37:30,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:37:30,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 22:37:30,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 22:37:30,082 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 6 states. [2020-10-27 22:37:30,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:37:30,540 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2020-10-27 22:37:30,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 22:37:30,544 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-10-27 22:37:30,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:37:30,567 INFO L225 Difference]: With dead ends: 39 [2020-10-27 22:37:30,567 INFO L226 Difference]: Without dead ends: 21 [2020-10-27 22:37:30,573 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-27 22:37:30,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-27 22:37:30,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-27 22:37:30,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-27 22:37:30,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-10-27 22:37:30,646 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 15 [2020-10-27 22:37:30,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:37:30,646 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-10-27 22:37:30,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 22:37:30,647 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-10-27 22:37:30,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 22:37:30,649 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:37:30,651 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 22:37:30,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 22:37:30,652 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:37:30,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:37:30,655 INFO L82 PathProgramCache]: Analyzing trace with hash -630540429, now seen corresponding path program 1 times [2020-10-27 22:37:30,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:37:30,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1336053876] [2020-10-27 22:37:30,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:37:30,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:37:30,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:37:30,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:37:31,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:37:31,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 22:37:31,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 22:37:31,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 442 [2020-10-27 22:37:31,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:37:31,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 22:37:31,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-27 22:37:31,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 22:37:31,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 22:37:31,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:37:31,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:37:31,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:37:31,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:37:31,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:37:31,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:37:31,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 22:37:31,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:37:31,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:37:31,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:37:31,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:37:31,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:37:31,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 22:37:31,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:37:31,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:37:31,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:37:31,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:37:31,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-27 22:37:31,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 22:37:31,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-10-27 22:37:31,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:37:31,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 22:37:31,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-10-27 22:37:31,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 22:37:31,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:37:31,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 22:37:31,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:37:31,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:37:31,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:37:31,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 22:37:31,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:37:31,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 22:37:31,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:37:31,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 22:37:31,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:37:31,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 22:37:31,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:37:31,360 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 22:37:31,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1336053876] [2020-10-27 22:37:31,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 22:37:31,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 22:37:31,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372566898] [2020-10-27 22:37:31,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 22:37:31,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:37:31,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 22:37:31,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 22:37:31,365 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 8 states. [2020-10-27 22:37:31,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:37:31,664 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2020-10-27 22:37:31,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 22:37:31,665 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-10-27 22:37:31,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:37:31,667 INFO L225 Difference]: With dead ends: 34 [2020-10-27 22:37:31,667 INFO L226 Difference]: Without dead ends: 25 [2020-10-27 22:37:31,668 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-27 22:37:31,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-27 22:37:31,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2020-10-27 22:37:31,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-27 22:37:31,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-10-27 22:37:31,677 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 22 [2020-10-27 22:37:31,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:37:31,678 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-10-27 22:37:31,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 22:37:31,678 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-10-27 22:37:31,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 22:37:31,679 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:37:31,679 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 22:37:31,679 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 22:37:31,680 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:37:31,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:37:31,680 INFO L82 PathProgramCache]: Analyzing trace with hash 256963252, now seen corresponding path program 1 times [2020-10-27 22:37:31,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:37:31,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [755730129] [2020-10-27 22:37:31,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:37:31,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:37:31,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:37:31,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:37:31,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 22:37:31,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:37:31,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 210 [2020-10-27 22:37:31,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:37:31,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 22:37:31,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 22:37:31,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 22:37:31,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 22:37:31,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:37:31,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:37:31,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:37:31,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:37:31,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:37:31,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:37:31,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 22:37:31,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:37:31,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:37:31,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:37:31,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:37:31,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:37:31,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 22:37:32,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:37:32,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:37:32,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:37:32,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-27 22:37:32,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:37:32,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 64 [2020-10-27 22:37:32,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:37:32,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 22:37:32,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:37:32,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 22:37:32,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:37:32,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 22:37:32,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:37:32,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:37:32,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:37:32,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 22:37:32,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:37:32,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 22:37:32,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:37:32,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 22:37:32,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:37:32,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 22:37:32,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:37:32,164 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 22:37:32,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [755730129] [2020-10-27 22:37:32,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 22:37:32,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 22:37:32,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849323406] [2020-10-27 22:37:32,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 22:37:32,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:37:32,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 22:37:32,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-27 22:37:32,167 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 9 states. [2020-10-27 22:37:32,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:37:32,575 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2020-10-27 22:37:32,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 22:37:32,575 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-10-27 22:37:32,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:37:32,577 INFO L225 Difference]: With dead ends: 30 [2020-10-27 22:37:32,577 INFO L226 Difference]: Without dead ends: 25 [2020-10-27 22:37:32,578 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-10-27 22:37:32,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-27 22:37:32,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-27 22:37:32,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-27 22:37:32,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-10-27 22:37:32,585 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 22 [2020-10-27 22:37:32,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:37:32,586 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-10-27 22:37:32,586 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 22:37:32,586 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-10-27 22:37:32,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 22:37:32,587 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:37:32,587 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 22:37:32,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 22:37:32,587 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:37:32,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:37:32,588 INFO L82 PathProgramCache]: Analyzing trace with hash 2059612612, now seen corresponding path program 1 times [2020-10-27 22:37:32,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:37:32,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [376812143] [2020-10-27 22:37:32,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:37:32,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:37:32,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:37:32,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:37:33,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:37:33,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 22:37:33,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 22:37:33,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 503 [2020-10-27 22:37:33,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:37:33,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 22:37:33,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-27 22:37:33,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 22:37:33,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 21 [2020-10-27 22:37:33,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:37:33,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:37:33,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:37:33,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:37:33,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:37:33,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:37:33,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 22:37:33,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:37:33,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:37:33,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:37:33,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:37:33,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:37:33,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 22:37:33,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:37:33,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:37:33,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:37:33,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:37:33,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 22:37:33,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 22:37:33,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 145 [2020-10-27 22:37:33,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:37:33,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 22:37:33,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 22:37:33,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 22:37:33,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:37:33,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 22:37:33,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:37:33,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:37:33,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:37:33,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-27 22:37:33,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:37:33,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-27 22:37:33,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:37:33,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 22:37:33,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:37:33,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 22:37:33,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:37:33,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 22:37:33,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:37:33,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:37:33,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:37:33,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 22:37:33,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:37:33,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 22:37:33,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:37:33,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 22:37:33,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:37:33,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 22:37:33,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:37:33,482 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-27 22:37:33,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [376812143] [2020-10-27 22:37:33,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 22:37:33,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 22:37:33,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879753203] [2020-10-27 22:37:33,484 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 22:37:33,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:37:33,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 22:37:33,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-27 22:37:33,485 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 11 states. [2020-10-27 22:37:33,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:37:33,828 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2020-10-27 22:37:33,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 22:37:33,828 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2020-10-27 22:37:33,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:37:33,830 INFO L225 Difference]: With dead ends: 38 [2020-10-27 22:37:33,830 INFO L226 Difference]: Without dead ends: 29 [2020-10-27 22:37:33,832 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-10-27 22:37:33,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-27 22:37:33,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-10-27 22:37:33,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-27 22:37:33,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-10-27 22:37:33,846 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 29 [2020-10-27 22:37:33,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:37:33,847 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-10-27 22:37:33,848 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 22:37:33,848 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-10-27 22:37:33,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 22:37:33,849 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:37:33,850 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 22:37:33,850 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 22:37:33,850 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:37:33,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:37:33,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1347851003, now seen corresponding path program 2 times [2020-10-27 22:37:33,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:37:33,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1361320553] [2020-10-27 22:37:33,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:37:33,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-27 22:37:33,873 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-27 22:37:33,873 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-27 22:37:33,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 22:37:33,898 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 10:37:33 BoogieIcfgContainer [2020-10-27 22:37:33,898 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-27 22:37:33,901 INFO L168 Benchmark]: Toolchain (without parser) took 5474.70 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 107.6 MB in the beginning and 78.3 MB in the end (delta: 29.3 MB). Peak memory consumption was 97.9 MB. Max. memory is 8.0 GB. [2020-10-27 22:37:33,904 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 151.0 MB. Free memory is still 123.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-27 22:37:33,907 INFO L168 Benchmark]: CACSL2BoogieTranslator took 240.90 ms. Allocated memory is still 151.0 MB. Free memory was 106.8 MB in the beginning and 125.7 MB in the end (delta: -18.9 MB). Peak memory consumption was 5.9 MB. Max. memory is 8.0 GB. [2020-10-27 22:37:33,909 INFO L168 Benchmark]: Boogie Preprocessor took 33.51 ms. Allocated memory is still 151.0 MB. Free memory was 125.7 MB in the beginning and 124.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-27 22:37:33,911 INFO L168 Benchmark]: RCFGBuilder took 530.33 ms. Allocated memory is still 151.0 MB. Free memory was 124.3 MB in the beginning and 121.8 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.9 MB. Max. memory is 8.0 GB. [2020-10-27 22:37:33,917 INFO L168 Benchmark]: TraceAbstraction took 4652.92 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 121.5 MB in the beginning and 78.3 MB in the end (delta: 43.2 MB). Peak memory consumption was 111.1 MB. Max. memory is 8.0 GB. [2020-10-27 22:37:33,925 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 151.0 MB. Free memory is still 123.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 240.90 ms. Allocated memory is still 151.0 MB. Free memory was 106.8 MB in the beginning and 125.7 MB in the end (delta: -18.9 MB). Peak memory consumption was 5.9 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 33.51 ms. Allocated memory is still 151.0 MB. Free memory was 125.7 MB in the beginning and 124.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 530.33 ms. Allocated memory is still 151.0 MB. Free memory was 124.3 MB in the beginning and 121.8 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4652.92 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 121.5 MB in the beginning and 78.3 MB in the end (delta: 43.2 MB). Peak memory consumption was 111.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L14] int input = __VERIFIER_nondet_int(); [L15] CALL, EXPR id(input) [L7] COND FALSE !(x==0) [L8] CALL, EXPR id((unsigned int)x-1) [L7] COND FALSE !(x==0) [L8] CALL, EXPR id((unsigned int)x-1) [L7] COND TRUE x==0 [L7] return 0; [L8] RET, EXPR id((unsigned int)x-1) [L8] int ret = id((unsigned int)x-1) + 1; [L9] COND FALSE !(ret > 3) [L10] return ret; [L8] RET, EXPR id((unsigned int)x-1) [L8] int ret = id((unsigned int)x-1) + 1; [L9] COND FALSE !(ret > 3) [L10] return ret; [L15] RET, EXPR id(input) [L15] int result = id(input); [L16] COND TRUE result == 2 [L17] CALL reach_error() [L4] __assert_fail("0", "id_b3_o2-2.c", 4, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.5s, OverallIterations: 5, TraceHistogramMax: 3, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 70 SDtfs, 72 SDslu, 141 SDs, 0 SdLazy, 312 SolverSat, 24 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 74 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=27occurred in iteration=4, 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, 4 MinimizatonAttempts, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 2.5s InterpolantComputationTime, 117 NumberOfCodeBlocks, 117 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 84 ConstructedInterpolants, 0 QuantifiedInterpolants, 5684 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 17/23 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...