/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=SHALLOWEST --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/id2_b3_o2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 04:06:23,434 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 04:06:23,439 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 04:06:23,498 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 04:06:23,498 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 04:06:23,505 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 04:06:23,507 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 04:06:23,512 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 04:06:23,529 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 04:06:23,530 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 04:06:23,532 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 04:06:23,533 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 04:06:23,534 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 04:06:23,537 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 04:06:23,542 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 04:06:23,543 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 04:06:23,544 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 04:06:23,548 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 04:06:23,552 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 04:06:23,558 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 04:06:23,560 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 04:06:23,564 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 04:06:23,568 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 04:06:23,569 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 04:06:23,576 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 04:06:23,577 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 04:06:23,577 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 04:06:23,578 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 04:06:23,579 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 04:06:23,581 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 04:06:23,582 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 04:06:23,583 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 04:06:23,585 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 04:06:23,586 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 04:06:23,587 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 04:06:23,587 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 04:06:23,588 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 04:06:23,588 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 04:06:23,588 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 04:06:23,589 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 04:06:23,591 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 04:06:23,599 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 04:06:23,650 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 04:06:23,651 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 04:06:23,655 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 04:06:23,655 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 04:06:23,655 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 04:06:23,656 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 04:06:23,656 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 04:06:23,656 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 04:06:23,656 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 04:06:23,656 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 04:06:23,657 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 04:06:23,658 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 04:06:23,658 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 04:06:23,658 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 04:06:23,658 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 04:06:23,659 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 04:06:23,659 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 04:06:23,659 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 04:06:23,659 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 04:06:23,659 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 04:06:23,660 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 04:06:23,660 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 04:06:23,660 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 04:06:23,660 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 04:06:23,660 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 04:06:23,661 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 04:06:23,661 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 04:06:23,661 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 04:06:23,661 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 04:06:23,661 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 04:06:24,112 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 04:06:24,143 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 04:06:24,147 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 04:06:24,148 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 04:06:24,149 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 04:06:24,150 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id2_b3_o2.c [2020-10-27 04:06:24,238 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b946114fd/e40c41aae76046f79bbe0b5627b0fc07/FLAGde7757004 [2020-10-27 04:06:24,870 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 04:06:24,870 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id2_b3_o2.c [2020-10-27 04:06:24,878 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b946114fd/e40c41aae76046f79bbe0b5627b0fc07/FLAGde7757004 [2020-10-27 04:06:25,251 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b946114fd/e40c41aae76046f79bbe0b5627b0fc07 [2020-10-27 04:06:25,258 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 04:06:25,265 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 04:06:25,267 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 04:06:25,268 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 04:06:25,272 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 04:06:25,273 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 04:06:25" (1/1) ... [2020-10-27 04:06:25,277 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10b16a87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:06:25, skipping insertion in model container [2020-10-27 04:06:25,277 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 04:06:25" (1/1) ... [2020-10-27 04:06:25,286 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 04:06:25,300 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 04:06:25,491 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 04:06:25,503 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 04:06:25,522 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 04:06:25,538 INFO L208 MainTranslator]: Completed translation [2020-10-27 04:06:25,538 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:06:25 WrapperNode [2020-10-27 04:06:25,539 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 04:06:25,540 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 04:06:25,540 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 04:06:25,540 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 04:06:25,553 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:06:25" (1/1) ... [2020-10-27 04:06:25,553 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:06:25" (1/1) ... [2020-10-27 04:06:25,561 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:06:25" (1/1) ... [2020-10-27 04:06:25,561 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:06:25" (1/1) ... [2020-10-27 04:06:25,568 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:06:25" (1/1) ... [2020-10-27 04:06:25,570 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:06:25" (1/1) ... [2020-10-27 04:06:25,571 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:06:25" (1/1) ... [2020-10-27 04:06:25,574 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 04:06:25,575 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 04:06:25,575 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 04:06:25,575 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 04:06:25,576 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:06:25" (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 04:06:25,657 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 04:06:25,658 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 04:06:25,658 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 04:06:25,658 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-10-27 04:06:25,658 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2020-10-27 04:06:25,658 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 04:06:25,658 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-27 04:06:25,659 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 04:06:25,659 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 04:06:25,659 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 04:06:25,659 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 04:06:25,659 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-10-27 04:06:25,659 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2020-10-27 04:06:25,660 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 04:06:25,660 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 04:06:25,660 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 04:06:25,660 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 04:06:25,660 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 04:06:25,660 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 04:06:25,661 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 04:06:25,980 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 04:06:25,981 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 04:06:25,983 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 04:06:25 BoogieIcfgContainer [2020-10-27 04:06:25,983 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 04:06:25,985 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 04:06:25,985 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 04:06:25,988 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 04:06:25,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 04:06:25" (1/3) ... [2020-10-27 04:06:25,990 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d3df3e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 04:06:25, skipping insertion in model container [2020-10-27 04:06:25,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:06:25" (2/3) ... [2020-10-27 04:06:25,991 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d3df3e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 04:06:25, skipping insertion in model container [2020-10-27 04:06:25,991 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 04:06:25" (3/3) ... [2020-10-27 04:06:25,993 INFO L111 eAbstractionObserver]: Analyzing ICFG id2_b3_o2.c [2020-10-27 04:06:26,008 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 04:06:26,015 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 04:06:26,033 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 04:06:26,066 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 04:06:26,067 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 04:06:26,067 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 04:06:26,067 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 04:06:26,067 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 04:06:26,067 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 04:06:26,068 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 04:06:26,068 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 04:06:26,119 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-10-27 04:06:26,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-27 04:06:26,125 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 04:06:26,125 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 04:06:26,126 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 04:06:26,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 04:06:26,136 INFO L82 PathProgramCache]: Analyzing trace with hash 791772439, now seen corresponding path program 1 times [2020-10-27 04:06:26,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 04:06:26,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [846580609] [2020-10-27 04:06:26,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 04:06:26,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:06:26,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:06:26,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:06:26,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 04:06:26,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:06:26,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 273 [2020-10-27 04:06:26,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:06:26,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 04:06:26,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 04:06:26,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 04:06:26,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 04:06:26,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 04:06:26,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:06:26,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:06:26,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:06:26,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 04:06:26,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:06:26,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 04:06:26,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:06:26,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 04:06:26,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:06:26,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 04:06:26,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:06:26,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 04:06:26,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:06:26,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:06:26,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:06:26,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 04:06:26,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:06:26,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-27 04:06:26,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:06:26,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 04:06:26,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:06:26,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 04:06:26,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 04:06:27,011 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 04:06:27,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [846580609] [2020-10-27 04:06:27,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 04:06:27,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 04:06:27,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727882070] [2020-10-27 04:06:27,022 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 04:06:27,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 04:06:27,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 04:06:27,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 04:06:27,042 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 6 states. [2020-10-27 04:06:27,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 04:06:27,359 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2020-10-27 04:06:27,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 04:06:27,361 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-10-27 04:06:27,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 04:06:27,371 INFO L225 Difference]: With dead ends: 46 [2020-10-27 04:06:27,372 INFO L226 Difference]: Without dead ends: 28 [2020-10-27 04:06:27,376 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-27 04:06:27,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-27 04:06:27,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-27 04:06:27,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-27 04:06:27,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-10-27 04:06:27,430 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 15 [2020-10-27 04:06:27,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 04:06:27,431 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-10-27 04:06:27,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 04:06:27,431 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-10-27 04:06:27,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 04:06:27,433 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 04:06:27,434 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] [2020-10-27 04:06:27,434 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 04:06:27,434 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 04:06:27,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 04:06:27,436 INFO L82 PathProgramCache]: Analyzing trace with hash 2001775916, now seen corresponding path program 1 times [2020-10-27 04:06:27,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 04:06:27,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1153530575] [2020-10-27 04:06:27,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 04:06:27,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:06:27,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:06:27,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:06:27,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:06:27,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 04:06:27,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 04:06:27,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 453 [2020-10-27 04:06:27,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:06:27,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 04:06:27,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 04:06:27,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 04:06:27,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 04:06:27,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 04:06:27,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:06:27,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:06:27,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:06:27,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 04:06:27,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:06:27,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 04:06:27,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:06:27,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 04:06:27,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:06:27,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 04:06:27,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 04:06:27,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 04:06:28,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:06:28,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:06:28,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:06:28,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-27 04:06:28,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:06:28,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-10-27 04:06:28,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:06:28,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 04:06:28,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-10-27 04:06:28,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 04:06:28,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:06:28,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 04:06:28,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:06:28,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:06:28,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:06:28,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 04:06:28,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:06:28,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 04:06:28,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:06:28,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 04:06:28,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:06:28,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 04:06:28,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:06:28,167 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 04:06:28,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1153530575] [2020-10-27 04:06:28,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 04:06:28,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 04:06:28,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421268123] [2020-10-27 04:06:28,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 04:06:28,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 04:06:28,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 04:06:28,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 04:06:28,177 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 6 states. [2020-10-27 04:06:28,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 04:06:28,448 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2020-10-27 04:06:28,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 04:06:28,448 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-27 04:06:28,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 04:06:28,450 INFO L225 Difference]: With dead ends: 47 [2020-10-27 04:06:28,450 INFO L226 Difference]: Without dead ends: 34 [2020-10-27 04:06:28,452 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-27 04:06:28,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-27 04:06:28,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-10-27 04:06:28,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-27 04:06:28,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-10-27 04:06:28,463 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 22 [2020-10-27 04:06:28,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 04:06:28,463 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-10-27 04:06:28,463 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 04:06:28,464 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-10-27 04:06:28,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 04:06:28,465 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 04:06:28,465 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] [2020-10-27 04:06:28,465 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 04:06:28,465 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 04:06:28,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 04:06:28,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1405687699, now seen corresponding path program 1 times [2020-10-27 04:06:28,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 04:06:28,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1986747671] [2020-10-27 04:06:28,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 04:06:28,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:06:28,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:06:28,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:06:28,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 04:06:28,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:06:28,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 201 [2020-10-27 04:06:28,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:06:28,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 04:06:28,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 04:06:28,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 04:06:28,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:06:28,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 04:06:28,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:06:28,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:06:28,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:06:28,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 04:06:28,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:06:28,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 04:06:28,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:06:28,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 04:06:28,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:06:28,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 04:06:28,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:06:28,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 04:06:28,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:06:28,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:06:28,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:06:28,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-27 04:06:28,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:06:28,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-27 04:06:28,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:06:28,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 04:06:28,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:06:28,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 04:06:28,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:06:28,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 04:06:28,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:06:28,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:06:28,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:06:28,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 04:06:28,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:06:28,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 04:06:28,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:06:28,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 04:06:28,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:06:28,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 04:06:28,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:06:28,885 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 04:06:28,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1986747671] [2020-10-27 04:06:28,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 04:06:28,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 04:06:28,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924947450] [2020-10-27 04:06:28,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 04:06:28,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 04:06:28,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 04:06:28,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 04:06:28,888 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 9 states. [2020-10-27 04:06:29,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 04:06:29,290 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2020-10-27 04:06:29,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 04:06:29,291 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-10-27 04:06:29,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 04:06:29,292 INFO L225 Difference]: With dead ends: 39 [2020-10-27 04:06:29,293 INFO L226 Difference]: Without dead ends: 34 [2020-10-27 04:06:29,297 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-10-27 04:06:29,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-27 04:06:29,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-10-27 04:06:29,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-27 04:06:29,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-10-27 04:06:29,314 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 22 [2020-10-27 04:06:29,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 04:06:29,315 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-10-27 04:06:29,315 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 04:06:29,315 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-10-27 04:06:29,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 04:06:29,317 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 04:06:29,317 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, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 04:06:29,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 04:06:29,318 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 04:06:29,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 04:06:29,319 INFO L82 PathProgramCache]: Analyzing trace with hash 20115896, now seen corresponding path program 1 times [2020-10-27 04:06:29,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 04:06:29,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [543512388] [2020-10-27 04:06:29,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 04:06:29,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:06:29,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:06:29,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:06:29,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:06:29,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 04:06:29,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 04:06:29,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 388 [2020-10-27 04:06:29,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:06:29,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 04:06:29,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-27 04:06:29,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 04:06:29,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 04:06:29,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 04:06:29,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:06:29,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:06:29,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:06:29,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 04:06:29,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:06:29,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 04:06:29,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:06:29,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 04:06:29,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:06:29,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 04:06:29,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 04:06:29,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 04:06:29,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:06:29,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:06:29,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:06:29,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 04:06:29,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:06:29,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 73 [2020-10-27 04:06:29,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:06:29,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 04:06:29,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 04:06:29,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 04:06:29,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:06:29,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 04:06:29,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:06:29,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:06:29,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:06:29,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-27 04:06:29,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:06:29,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 04:06:29,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:06:29,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 04:06:29,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-10-27 04:06:29,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 04:06:29,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:06:29,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 04:06:29,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:06:29,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:06:29,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:06:29,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 04:06:29,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:06:29,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 04:06:29,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:06:29,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 04:06:29,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:06:29,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 04:06:29,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:06:30,044 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 04:06:30,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [543512388] [2020-10-27 04:06:30,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 04:06:30,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 04:06:30,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682354020] [2020-10-27 04:06:30,046 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 04:06:30,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 04:06:30,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 04:06:30,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 04:06:30,047 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 6 states. [2020-10-27 04:06:30,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 04:06:30,321 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2020-10-27 04:06:30,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 04:06:30,322 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-10-27 04:06:30,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 04:06:30,324 INFO L225 Difference]: With dead ends: 51 [2020-10-27 04:06:30,324 INFO L226 Difference]: Without dead ends: 38 [2020-10-27 04:06:30,325 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 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 04:06:30,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-27 04:06:30,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2020-10-27 04:06:30,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-27 04:06:30,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2020-10-27 04:06:30,334 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 29 [2020-10-27 04:06:30,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 04:06:30,334 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2020-10-27 04:06:30,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 04:06:30,334 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-10-27 04:06:30,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 04:06:30,335 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 04:06:30,336 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, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 04:06:30,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 04:06:30,336 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 04:06:30,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 04:06:30,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1776835463, now seen corresponding path program 1 times [2020-10-27 04:06:30,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 04:06:30,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [444421591] [2020-10-27 04:06:30,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 04:06:30,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:06:30,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:06:30,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:06:30,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:06:30,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 04:06:30,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 04:06:30,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 384 [2020-10-27 04:06:30,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:06:30,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 04:06:30,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-27 04:06:30,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 04:06:30,736 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:06:30,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 04:06:30,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:06:30,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:06:30,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:06:30,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 04:06:30,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:06:30,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 04:06:30,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:06:30,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 04:06:30,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:06:30,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 04:06:30,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:06:30,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 04:06:30,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:06:30,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:06:30,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:06:30,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 04:06:30,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:06:30,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 60 [2020-10-27 04:06:30,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:06:30,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 04:06:30,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 04:06:30,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 04:06:30,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:06:30,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 04:06:30,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:06:30,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:06:30,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:06:30,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-27 04:06:30,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:06:30,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-27 04:06:30,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:06:30,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 04:06:30,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:06:30,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 04:06:30,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:06:31,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 04:06:31,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:06:31,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:06:31,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:06:31,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 04:06:31,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:06:31,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 04:06:31,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:06:31,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 04:06:31,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:06:31,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 04:06:31,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:06:31,033 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 04:06:31,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [444421591] [2020-10-27 04:06:31,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 04:06:31,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 04:06:31,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179107559] [2020-10-27 04:06:31,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 04:06:31,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 04:06:31,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 04:06:31,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 04:06:31,035 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 9 states. [2020-10-27 04:06:31,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 04:06:31,480 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2020-10-27 04:06:31,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 04:06:31,481 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-10-27 04:06:31,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 04:06:31,482 INFO L225 Difference]: With dead ends: 55 [2020-10-27 04:06:31,482 INFO L226 Difference]: Without dead ends: 42 [2020-10-27 04:06:31,483 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-10-27 04:06:31,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-27 04:06:31,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2020-10-27 04:06:31,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-27 04:06:31,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2020-10-27 04:06:31,493 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 29 [2020-10-27 04:06:31,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 04:06:31,493 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2020-10-27 04:06:31,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 04:06:31,493 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2020-10-27 04:06:31,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 04:06:31,494 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 04:06:31,495 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, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 04:06:31,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 04:06:31,495 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 04:06:31,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 04:06:31,496 INFO L82 PathProgramCache]: Analyzing trace with hash -889331782, now seen corresponding path program 1 times [2020-10-27 04:06:31,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 04:06:31,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1645002199] [2020-10-27 04:06:31,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 04:06:31,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-27 04:06:31,511 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-27 04:06:31,511 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-27 04:06:31,517 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 04:06:31,535 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 04:06:31 BoogieIcfgContainer [2020-10-27 04:06:31,535 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-27 04:06:31,538 INFO L168 Benchmark]: Toolchain (without parser) took 6276.27 ms. Allocated memory was 152.0 MB in the beginning and 229.6 MB in the end (delta: 77.6 MB). Free memory was 128.3 MB in the beginning and 108.0 MB in the end (delta: 20.2 MB). Peak memory consumption was 98.4 MB. Max. memory is 8.0 GB. [2020-10-27 04:06:31,538 INFO L168 Benchmark]: CDTParser took 0.67 ms. Allocated memory is still 152.0 MB. Free memory is still 122.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-27 04:06:31,539 INFO L168 Benchmark]: CACSL2BoogieTranslator took 271.81 ms. Allocated memory is still 152.0 MB. Free memory was 127.5 MB in the beginning and 118.3 MB in the end (delta: 9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2020-10-27 04:06:31,540 INFO L168 Benchmark]: Boogie Preprocessor took 33.82 ms. Allocated memory is still 152.0 MB. Free memory was 118.3 MB in the beginning and 116.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-27 04:06:31,541 INFO L168 Benchmark]: RCFGBuilder took 408.20 ms. Allocated memory is still 152.0 MB. Free memory was 116.8 MB in the beginning and 102.6 MB in the end (delta: 14.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2020-10-27 04:06:31,542 INFO L168 Benchmark]: TraceAbstraction took 5550.46 ms. Allocated memory was 152.0 MB in the beginning and 229.6 MB in the end (delta: 77.6 MB). Free memory was 102.2 MB in the beginning and 108.0 MB in the end (delta: -5.9 MB). Peak memory consumption was 72.2 MB. Max. memory is 8.0 GB. [2020-10-27 04:06:31,546 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.67 ms. Allocated memory is still 152.0 MB. Free memory is still 122.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 271.81 ms. Allocated memory is still 152.0 MB. Free memory was 127.5 MB in the beginning and 118.3 MB in the end (delta: 9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 33.82 ms. Allocated memory is still 152.0 MB. Free memory was 118.3 MB in the beginning and 116.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 408.20 ms. Allocated memory is still 152.0 MB. Free memory was 116.8 MB in the beginning and 102.6 MB in the end (delta: 14.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5550.46 ms. Allocated memory was 152.0 MB in the beginning and 229.6 MB in the end (delta: 77.6 MB). Free memory was 102.2 MB in the beginning and 108.0 MB in the end (delta: -5.9 MB). Peak memory consumption was 72.2 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: [L24] unsigned int input = __VERIFIER_nondet_uint(); [L25] CALL, EXPR id(input) [L10] COND FALSE !(x==0) [L11] CALL, EXPR id2(x-1) [L17] COND FALSE !(x==0) [L18] CALL, EXPR id(x-1) [L10] COND TRUE x==0 [L10] return 0; [L18] RET, EXPR id(x-1) [L18] unsigned int ret = id(x-1) + 1; [L19] COND FALSE !(ret > 3) [L20] return ret; [L11] RET, EXPR id2(x-1) [L11] unsigned int ret = id2(x-1) + 1; [L12] COND FALSE !(ret > 3) [L13] return ret; [L25] RET, EXPR id(input) [L25] unsigned int result = id(input); [L26] COND TRUE result == 2 [L27] CALL reach_error() [L4] __assert_fail("0", "id2_b3_o2.c", 4, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.4s, OverallIterations: 6, TraceHistogramMax: 2, AutomataDifference: 1.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 128 SDtfs, 115 SDslu, 185 SDs, 0 SdLazy, 556 SolverSat, 31 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 88 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=40occurred in iteration=5, 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, 5 MinimizatonAttempts, 8 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 3.1s InterpolantComputationTime, 146 NumberOfCodeBlocks, 146 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 112 ConstructedInterpolants, 0 QuantifiedInterpolants, 10094 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 8/8 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...