/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/id_i5_o5-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 04:07:30,414 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 04:07:30,417 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 04:07:30,470 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 04:07:30,471 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 04:07:30,479 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 04:07:30,481 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 04:07:30,486 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 04:07:30,490 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 04:07:30,496 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 04:07:30,498 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 04:07:30,499 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 04:07:30,500 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 04:07:30,503 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 04:07:30,507 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 04:07:30,510 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 04:07:30,511 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 04:07:30,515 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 04:07:30,522 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 04:07:30,544 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 04:07:30,547 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 04:07:30,548 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 04:07:30,550 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 04:07:30,552 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 04:07:30,566 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 04:07:30,566 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 04:07:30,567 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 04:07:30,569 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 04:07:30,569 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 04:07:30,571 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 04:07:30,571 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 04:07:30,572 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 04:07:30,574 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 04:07:30,575 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 04:07:30,577 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 04:07:30,577 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 04:07:30,580 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 04:07:30,580 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 04:07:30,580 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 04:07:30,581 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 04:07:30,582 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 04:07:30,589 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 04:07:30,644 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 04:07:30,644 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 04:07:30,649 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 04:07:30,650 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 04:07:30,650 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 04:07:30,650 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 04:07:30,650 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 04:07:30,650 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 04:07:30,651 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 04:07:30,651 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 04:07:30,652 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 04:07:30,652 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 04:07:30,653 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 04:07:30,653 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 04:07:30,653 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 04:07:30,653 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 04:07:30,653 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 04:07:30,654 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 04:07:30,654 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 04:07:30,654 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 04:07:30,655 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 04:07:30,655 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 04:07:30,655 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 04:07:30,655 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 04:07:30,655 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 04:07:30,656 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 04:07:30,656 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 04:07:30,656 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 04:07:30,656 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 04:07:30,656 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 04:07:31,105 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 04:07:31,151 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 04:07:31,155 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 04:07:31,156 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 04:07:31,157 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 04:07:31,158 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_i5_o5-1.c [2020-10-27 04:07:31,270 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1b8737710/d1650048d816457ab3f64062646cbdf9/FLAGbf46f52f1 [2020-10-27 04:07:31,844 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 04:07:31,845 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id_i5_o5-1.c [2020-10-27 04:07:31,853 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1b8737710/d1650048d816457ab3f64062646cbdf9/FLAGbf46f52f1 [2020-10-27 04:07:32,223 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1b8737710/d1650048d816457ab3f64062646cbdf9 [2020-10-27 04:07:32,227 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 04:07:32,236 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 04:07:32,242 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 04:07:32,243 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 04:07:32,247 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 04:07:32,249 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 04:07:32" (1/1) ... [2020-10-27 04:07:32,254 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d6a6cb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:07:32, skipping insertion in model container [2020-10-27 04:07:32,255 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 04:07:32" (1/1) ... [2020-10-27 04:07:32,264 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 04:07:32,279 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 04:07:32,519 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 04:07:32,543 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 04:07:32,560 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 04:07:32,580 INFO L208 MainTranslator]: Completed translation [2020-10-27 04:07:32,581 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:07:32 WrapperNode [2020-10-27 04:07:32,581 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 04:07:32,583 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 04:07:32,584 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 04:07:32,584 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 04:07:32,594 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:07:32" (1/1) ... [2020-10-27 04:07:32,595 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:07:32" (1/1) ... [2020-10-27 04:07:32,602 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:07:32" (1/1) ... [2020-10-27 04:07:32,602 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:07:32" (1/1) ... [2020-10-27 04:07:32,619 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:07:32" (1/1) ... [2020-10-27 04:07:32,621 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:07:32" (1/1) ... [2020-10-27 04:07:32,636 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:07:32" (1/1) ... [2020-10-27 04:07:32,638 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 04:07:32,640 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 04:07:32,640 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 04:07:32,640 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 04:07:32,651 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:07:32" (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 04:07:32,745 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 04:07:32,745 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 04:07:32,745 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 04:07:32,746 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-10-27 04:07:32,746 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 04:07:32,746 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 04:07:32,746 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 04:07:32,746 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 04:07:32,746 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 04:07:32,747 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 04:07:32,747 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-10-27 04:07:32,747 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 04:07:32,747 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 04:07:32,747 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 04:07:32,747 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 04:07:32,749 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 04:07:32,749 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 04:07:32,749 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 04:07:32,969 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 04:07:32,969 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 04:07:32,971 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 04:07:32 BoogieIcfgContainer [2020-10-27 04:07:32,972 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 04:07:32,973 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 04:07:32,974 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 04:07:32,977 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 04:07:32,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 04:07:32" (1/3) ... [2020-10-27 04:07:32,979 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@880477a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 04:07:32, skipping insertion in model container [2020-10-27 04:07:32,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:07:32" (2/3) ... [2020-10-27 04:07:32,980 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@880477a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 04:07:32, skipping insertion in model container [2020-10-27 04:07:32,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 04:07:32" (3/3) ... [2020-10-27 04:07:32,981 INFO L111 eAbstractionObserver]: Analyzing ICFG id_i5_o5-1.c [2020-10-27 04:07:32,995 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 04:07:33,000 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 04:07:33,014 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 04:07:33,043 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 04:07:33,043 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 04:07:33,043 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 04:07:33,043 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 04:07:33,044 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 04:07:33,044 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 04:07:33,044 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 04:07:33,044 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 04:07:33,063 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-10-27 04:07:33,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-27 04:07:33,069 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 04:07:33,070 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 04:07:33,071 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 04:07:33,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 04:07:33,078 INFO L82 PathProgramCache]: Analyzing trace with hash 560135365, now seen corresponding path program 1 times [2020-10-27 04:07:33,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 04:07:33,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1473737468] [2020-10-27 04:07:33,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 04:07:33,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:07:33,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:07:33,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:07:33,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:07:33,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 04:07:33,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 04:07:33,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 722 [2020-10-27 04:07:33,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:07:33,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 04:07:33,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 04:07:33,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 04:07:33,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-27 04:07:34,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 04:07:34,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:07:34,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:07:34,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:07:34,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 04:07:34,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:07:34,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 04:07:34,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:07:34,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 04:07:34,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:07:34,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 04:07:34,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:07:34,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 04:07:34,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:07:34,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:07:34,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:07:34,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 04:07:34,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:07:34,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 04:07:34,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:07:34,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 04:07:34,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 04:07:34,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 04:07:34,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:07:34,289 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 04:07:34,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1473737468] [2020-10-27 04:07:34,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 04:07:34,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 04:07:34,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396851224] [2020-10-27 04:07:34,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 04:07:34,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 04:07:34,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 04:07:34,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 04:07:34,317 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 6 states. [2020-10-27 04:07:34,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 04:07:34,560 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2020-10-27 04:07:34,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 04:07:34,562 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-10-27 04:07:34,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 04:07:34,572 INFO L225 Difference]: With dead ends: 36 [2020-10-27 04:07:34,572 INFO L226 Difference]: Without dead ends: 20 [2020-10-27 04:07:34,576 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-27 04:07:34,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-27 04:07:34,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-27 04:07:34,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-27 04:07:34,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-10-27 04:07:34,627 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 15 [2020-10-27 04:07:34,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 04:07:34,627 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-10-27 04:07:34,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 04:07:34,628 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-10-27 04:07:34,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 04:07:34,630 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 04:07:34,630 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 04:07:34,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 04:07:34,631 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 04:07:34,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 04:07:34,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1295611761, now seen corresponding path program 1 times [2020-10-27 04:07:34,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 04:07:34,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [169448938] [2020-10-27 04:07:34,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 04:07:34,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:07:34,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:07:34,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:07:35,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:07:35,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 04:07:35,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 04:07:35,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 607 [2020-10-27 04:07:35,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:07:35,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 04:07:35,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 04:07:35,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 04:07:35,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:07:35,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 04:07:35,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:07:35,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:07:35,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:07:35,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 04:07:35,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:07:35,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 04:07:35,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:07:35,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 04:07:35,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:07:35,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 04:07:35,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:07:35,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 04:07:35,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:07:35,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:07:35,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:07:35,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-27 04:07:35,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:07:35,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-27 04:07:35,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:07:35,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 04:07:35,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 04:07:35,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 04:07:35,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:07:35,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 04:07:35,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:07:35,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:07:35,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:07:35,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 04:07:35,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:07:35,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 04:07:35,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:07:35,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 04:07:35,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:07:35,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 04:07:35,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:07:35,433 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 04:07:35,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [169448938] [2020-10-27 04:07:35,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 04:07:35,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 04:07:35,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692680860] [2020-10-27 04:07:35,435 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 04:07:35,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 04:07:35,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 04:07:35,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-27 04:07:35,437 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 8 states. [2020-10-27 04:07:35,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 04:07:35,725 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-10-27 04:07:35,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 04:07:35,726 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-10-27 04:07:35,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 04:07:35,727 INFO L225 Difference]: With dead ends: 28 [2020-10-27 04:07:35,728 INFO L226 Difference]: Without dead ends: 23 [2020-10-27 04:07:35,729 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 04:07:35,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-27 04:07:35,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-27 04:07:35,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-27 04:07:35,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-10-27 04:07:35,739 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 21 [2020-10-27 04:07:35,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 04:07:35,739 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-10-27 04:07:35,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 04:07:35,739 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-10-27 04:07:35,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 04:07:35,741 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 04:07:35,741 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 04:07:35,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 04:07:35,742 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 04:07:35,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 04:07:35,742 INFO L82 PathProgramCache]: Analyzing trace with hash -116387003, now seen corresponding path program 2 times [2020-10-27 04:07:35,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 04:07:35,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [661281123] [2020-10-27 04:07:35,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 04:07:35,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:07:35,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:07:35,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:07:36,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:07:36,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 04:07:36,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 04:07:36,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 735 [2020-10-27 04:07:36,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:07:36,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 04:07:36,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 04:07:36,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 04:07:36,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 04:07:36,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 04:07:36,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:07:36,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:07:36,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:07:36,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 04:07:36,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:07:36,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 04:07:36,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:07:36,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 04:07:36,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:07:36,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 04:07:36,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:07:36,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 04:07:36,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:07:36,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:07:36,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:07:36,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 04:07:36,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:07:36,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-27 04:07:36,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:07:36,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 04:07:36,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 04:07:36,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 04:07:36,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:07:36,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 04:07:36,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:07:36,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:07:36,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:07:36,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-27 04:07:36,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:07:36,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 04:07:36,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:07:36,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 04:07:36,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:07:36,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 04:07:36,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:07:36,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 04:07:36,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:07:36,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:07:36,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:07:36,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 04:07:36,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:07:36,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 04:07:36,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:07:36,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 04:07:36,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:07:36,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 04:07:36,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:07:36,722 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-27 04:07:36,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [661281123] [2020-10-27 04:07:36,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 04:07:36,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 04:07:36,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046201777] [2020-10-27 04:07:36,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 04:07:36,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 04:07:36,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 04:07:36,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-27 04:07:36,725 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 8 states. [2020-10-27 04:07:36,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 04:07:36,984 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-10-27 04:07:36,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 04:07:36,985 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-10-27 04:07:36,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 04:07:36,986 INFO L225 Difference]: With dead ends: 31 [2020-10-27 04:07:36,987 INFO L226 Difference]: Without dead ends: 26 [2020-10-27 04:07:36,987 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-27 04:07:36,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-27 04:07:36,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-27 04:07:36,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-27 04:07:36,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-10-27 04:07:36,995 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 27 [2020-10-27 04:07:36,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 04:07:36,996 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-10-27 04:07:36,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 04:07:36,996 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-10-27 04:07:36,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 04:07:36,997 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 04:07:36,997 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 04:07:36,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 04:07:36,998 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 04:07:36,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 04:07:36,999 INFO L82 PathProgramCache]: Analyzing trace with hash -738125937, now seen corresponding path program 3 times [2020-10-27 04:07:36,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 04:07:36,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [485811596] [2020-10-27 04:07:36,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 04:07:37,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:07:37,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:07:37,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:07:38,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:07:38,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 04:07:38,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 04:07:38,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1137 [2020-10-27 04:07:38,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:07:38,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 04:07:38,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 04:07:38,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 04:07:38,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:07:38,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 04:07:38,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:07:38,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:07:38,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:07:38,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 04:07:38,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:07:38,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 04:07:38,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:07:38,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 04:07:38,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:07:38,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 04:07:38,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:07:38,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 04:07:38,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:07:38,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:07:38,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:07:38,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 04:07:38,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:07:38,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 60 [2020-10-27 04:07:38,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:07:38,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 04:07:38,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 04:07:38,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 04:07:38,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:07:38,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 04:07:38,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:07:38,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:07:38,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:07:38,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 04:07:38,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:07:38,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-27 04:07:38,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:07:38,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 04:07:38,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:07:38,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 04:07:38,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:07:38,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 04:07:38,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:07:38,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:07:38,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:07:38,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-27 04:07:38,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:07:38,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-27 04:07:38,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:07:38,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 04:07:38,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:07:38,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 04:07:38,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:07:38,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 04:07:38,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:07:38,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:07:38,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:07:38,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 04:07:38,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:07:38,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 04:07:38,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:07:38,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 04:07:38,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:07:38,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 04:07:38,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:07:38,457 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-27 04:07:38,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [485811596] [2020-10-27 04:07:38,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 04:07:38,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 04:07:38,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848399312] [2020-10-27 04:07:38,459 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 04:07:38,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 04:07:38,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 04:07:38,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-27 04:07:38,461 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 10 states. [2020-10-27 04:07:38,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 04:07:38,793 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-10-27 04:07:38,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 04:07:38,794 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2020-10-27 04:07:38,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 04:07:38,795 INFO L225 Difference]: With dead ends: 34 [2020-10-27 04:07:38,796 INFO L226 Difference]: Without dead ends: 29 [2020-10-27 04:07:38,796 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-10-27 04:07:38,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-27 04:07:38,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-27 04:07:38,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-27 04:07:38,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-10-27 04:07:38,820 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 33 [2020-10-27 04:07:38,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 04:07:38,821 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-10-27 04:07:38,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 04:07:38,821 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-10-27 04:07:38,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 04:07:38,823 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 04:07:38,823 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 04:07:38,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 04:07:38,823 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 04:07:38,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 04:07:38,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1342585285, now seen corresponding path program 4 times [2020-10-27 04:07:38,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 04:07:38,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2002938592] [2020-10-27 04:07:38,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 04:07:38,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:07:38,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:07:38,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:07:39,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:07:39,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 04:07:39,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 04:07:39,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 993 [2020-10-27 04:07:39,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:07:39,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 04:07:39,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 04:07:39,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 04:07:39,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:07:39,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 04:07:39,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:07:39,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:07:39,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:07:39,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 04:07:39,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:07:39,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 04:07:39,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:07:39,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 04:07:39,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:07:39,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 04:07:39,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:07:39,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 04:07:39,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:07:39,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:07:39,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:07:39,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 04:07:39,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:07:39,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 82 [2020-10-27 04:07:39,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:07:39,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 04:07:39,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 04:07:39,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 04:07:39,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:07:40,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 04:07:40,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:07:40,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:07:40,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:07:40,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 04:07:40,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:07:40,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-10-27 04:07:40,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:07:40,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 04:07:40,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:07:40,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 04:07:40,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 04:07:40,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 04:07:40,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:07:40,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:07:40,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:07:40,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 04:07:40,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:07:40,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-27 04:07:40,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:07:40,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 04:07:40,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:07:40,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 04:07:40,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:07:40,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 04:07:40,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:07:40,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:07:40,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:07:40,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-27 04:07:40,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:07:40,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 04:07:40,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:07:40,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 04:07:40,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:07:40,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 04:07:40,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:07:40,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 04:07:40,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:07:40,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:07:40,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:07:40,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 04:07:40,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:07:40,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 04:07:40,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:07:40,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 04:07:40,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:07:40,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 04:07:40,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:07:40,248 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-27 04:07:40,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2002938592] [2020-10-27 04:07:40,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 04:07:40,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 04:07:40,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789715315] [2020-10-27 04:07:40,249 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 04:07:40,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 04:07:40,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 04:07:40,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-27 04:07:40,251 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 10 states. [2020-10-27 04:07:40,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 04:07:40,634 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-10-27 04:07:40,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 04:07:40,635 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2020-10-27 04:07:40,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 04:07:40,636 INFO L225 Difference]: With dead ends: 37 [2020-10-27 04:07:40,637 INFO L226 Difference]: Without dead ends: 32 [2020-10-27 04:07:40,637 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2020-10-27 04:07:40,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-27 04:07:40,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-27 04:07:40,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-27 04:07:40,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-10-27 04:07:40,645 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 39 [2020-10-27 04:07:40,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 04:07:40,646 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-10-27 04:07:40,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 04:07:40,646 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-10-27 04:07:40,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 04:07:40,647 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 04:07:40,648 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 04:07:40,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 04:07:40,648 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 04:07:40,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 04:07:40,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1660180111, now seen corresponding path program 5 times [2020-10-27 04:07:40,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 04:07:40,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1376053231] [2020-10-27 04:07:40,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 04:07:40,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-27 04:07:40,663 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-27 04:07:40,663 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-27 04:07:40,668 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 04:07:40,686 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 04:07:40 BoogieIcfgContainer [2020-10-27 04:07:40,686 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-27 04:07:40,689 INFO L168 Benchmark]: Toolchain (without parser) took 8457.03 ms. Allocated memory was 153.1 MB in the beginning and 222.3 MB in the end (delta: 69.2 MB). Free memory was 107.7 MB in the beginning and 120.1 MB in the end (delta: -12.4 MB). Peak memory consumption was 58.3 MB. Max. memory is 8.0 GB. [2020-10-27 04:07:40,689 INFO L168 Benchmark]: CDTParser took 0.74 ms. Allocated memory is still 153.1 MB. Free memory is still 125.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-27 04:07:40,690 INFO L168 Benchmark]: CACSL2BoogieTranslator took 339.63 ms. Allocated memory is still 153.1 MB. Free memory was 107.2 MB in the beginning and 98.2 MB in the end (delta: 9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2020-10-27 04:07:40,691 INFO L168 Benchmark]: Boogie Preprocessor took 55.36 ms. Allocated memory is still 153.1 MB. Free memory was 98.2 MB in the beginning and 136.6 MB in the end (delta: -38.4 MB). Peak memory consumption was 6.8 MB. Max. memory is 8.0 GB. [2020-10-27 04:07:40,692 INFO L168 Benchmark]: RCFGBuilder took 332.13 ms. Allocated memory is still 153.1 MB. Free memory was 136.6 MB in the beginning and 124.9 MB in the end (delta: 11.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-10-27 04:07:40,693 INFO L168 Benchmark]: TraceAbstraction took 7712.47 ms. Allocated memory was 153.1 MB in the beginning and 222.3 MB in the end (delta: 69.2 MB). Free memory was 124.5 MB in the beginning and 120.1 MB in the end (delta: 4.4 MB). Peak memory consumption was 74.9 MB. Max. memory is 8.0 GB. [2020-10-27 04:07:40,697 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.74 ms. Allocated memory is still 153.1 MB. Free memory is still 125.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 339.63 ms. Allocated memory is still 153.1 MB. Free memory was 107.2 MB in the beginning and 98.2 MB in the end (delta: 9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 55.36 ms. Allocated memory is still 153.1 MB. Free memory was 98.2 MB in the beginning and 136.6 MB in the end (delta: -38.4 MB). Peak memory consumption was 6.8 MB. Max. memory is 8.0 GB. * RCFGBuilder took 332.13 ms. Allocated memory is still 153.1 MB. Free memory was 136.6 MB in the beginning and 124.9 MB in the end (delta: 11.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 7712.47 ms. Allocated memory was 153.1 MB in the beginning and 222.3 MB in the end (delta: 69.2 MB). Free memory was 124.5 MB in the beginning and 120.1 MB in the end (delta: 4.4 MB). Peak memory consumption was 74.9 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: [L12] int input = 5; [L13] CALL, EXPR id(input) [L7] COND FALSE !(x==0) [L8] CALL, EXPR id(x-1) [L7] COND FALSE !(x==0) [L8] CALL, EXPR id(x-1) [L7] COND FALSE !(x==0) [L8] CALL, EXPR id(x-1) [L7] COND FALSE !(x==0) [L8] CALL, EXPR id(x-1) [L7] COND FALSE !(x==0) [L8] CALL, EXPR id(x-1) [L7] COND TRUE x==0 [L7] return 0; [L8] RET, EXPR id(x-1) [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) [L8] return id(x-1) + 1; [L13] RET, EXPR id(input) [L13] int result = id(input); [L14] COND TRUE result == 5 [L15] CALL reach_error() [L4] __assert_fail("0", "id_i5_o5-1.c", 4, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 7.6s, OverallIterations: 6, TraceHistogramMax: 6, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 74 SDtfs, 126 SDslu, 112 SDs, 0 SdLazy, 241 SolverSat, 77 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 95 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred 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, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 5.6s InterpolantComputationTime, 180 NumberOfCodeBlocks, 180 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 130 ConstructedInterpolants, 0 QuantifiedInterpolants, 12404 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 1 PerfectInterpolantSequences, 45/100 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...