/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/loops/ludcmp.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 20:35:28,413 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 20:35:28,416 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 20:35:28,454 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 20:35:28,454 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 20:35:28,456 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 20:35:28,457 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 20:35:28,460 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 20:35:28,462 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 20:35:28,463 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 20:35:28,465 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 20:35:28,466 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 20:35:28,467 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 20:35:28,468 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 20:35:28,469 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 20:35:28,471 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 20:35:28,472 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 20:35:28,473 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 20:35:28,475 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 20:35:28,477 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 20:35:28,479 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 20:35:28,481 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 20:35:28,482 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 20:35:28,483 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 20:35:28,487 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 20:35:28,487 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 20:35:28,488 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 20:35:28,489 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 20:35:28,489 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 20:35:28,490 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 20:35:28,491 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 20:35:28,491 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 20:35:28,494 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 20:35:28,495 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 20:35:28,496 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 20:35:28,497 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 20:35:28,497 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 20:35:28,510 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 20:35:28,510 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 20:35:28,511 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 20:35:28,512 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 20:35:28,513 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 20:35:28,542 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 20:35:28,542 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 20:35:28,543 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 20:35:28,544 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 20:35:28,544 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 20:35:28,544 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 20:35:28,544 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 20:35:28,545 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 20:35:28,545 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 20:35:28,545 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 20:35:28,545 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 20:35:28,545 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 20:35:28,546 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 20:35:28,546 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 20:35:28,546 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 20:35:28,546 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 20:35:28,546 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 20:35:28,547 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 20:35:28,547 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 20:35:28,547 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 20:35:28,547 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 20:35:28,547 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 20:35:28,548 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 20:35:28,548 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 20:35:28,548 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 20:35:28,548 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 20:35:28,548 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 20:35:28,549 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 20:35:28,549 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 20:35:28,549 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 20:35:28,927 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 20:35:28,967 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 20:35:28,970 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 20:35:28,973 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 20:35:28,974 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 20:35:28,976 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/ludcmp.c [2020-10-27 20:35:29,067 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c0e35c5d1/41cdda01c1e9468b9c10cf2ad7a93c72/FLAG1ff24da78 [2020-10-27 20:35:29,671 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 20:35:29,674 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/ludcmp.c [2020-10-27 20:35:29,686 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c0e35c5d1/41cdda01c1e9468b9c10cf2ad7a93c72/FLAG1ff24da78 [2020-10-27 20:35:30,047 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c0e35c5d1/41cdda01c1e9468b9c10cf2ad7a93c72 [2020-10-27 20:35:30,051 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 20:35:30,059 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 20:35:30,061 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 20:35:30,061 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 20:35:30,065 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 20:35:30,066 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:35:30" (1/1) ... [2020-10-27 20:35:30,069 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12ffc228 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:35:30, skipping insertion in model container [2020-10-27 20:35:30,070 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:35:30" (1/1) ... [2020-10-27 20:35:30,078 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 20:35:30,101 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 20:35:30,323 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:35:30,334 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 20:35:30,379 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:35:30,409 INFO L208 MainTranslator]: Completed translation [2020-10-27 20:35:30,410 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:35:30 WrapperNode [2020-10-27 20:35:30,410 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 20:35:30,412 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 20:35:30,412 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 20:35:30,412 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 20:35:30,427 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:35:30" (1/1) ... [2020-10-27 20:35:30,430 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:35:30" (1/1) ... [2020-10-27 20:35:30,463 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:35:30" (1/1) ... [2020-10-27 20:35:30,463 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:35:30" (1/1) ... [2020-10-27 20:35:30,501 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:35:30" (1/1) ... [2020-10-27 20:35:30,521 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:35:30" (1/1) ... [2020-10-27 20:35:30,527 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:35:30" (1/1) ... [2020-10-27 20:35:30,539 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 20:35:30,541 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 20:35:30,541 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 20:35:30,541 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 20:35:30,544 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:35:30" (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 20:35:30,638 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 20:35:30,639 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 20:35:30,639 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 20:35:30,640 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 20:35:30,640 INFO L138 BoogieDeclarations]: Found implementation of procedure fabs [2020-10-27 20:35:30,641 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 20:35:30,642 INFO L138 BoogieDeclarations]: Found implementation of procedure ludcmp [2020-10-27 20:35:30,642 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 20:35:30,642 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 20:35:30,642 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 20:35:30,643 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 20:35:30,643 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 20:35:30,644 INFO L130 BoogieDeclarations]: Found specification of procedure ludcmp [2020-10-27 20:35:30,644 INFO L130 BoogieDeclarations]: Found specification of procedure fabs [2020-10-27 20:35:30,644 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 20:35:30,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-10-27 20:35:30,645 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-10-27 20:35:30,645 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 20:35:30,645 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 20:35:30,646 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 20:35:30,646 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 20:35:30,646 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 20:35:30,646 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 20:35:31,286 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 20:35:31,287 INFO L298 CfgBuilder]: Removed 11 assume(true) statements. [2020-10-27 20:35:31,288 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:35:31 BoogieIcfgContainer [2020-10-27 20:35:31,288 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 20:35:31,290 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 20:35:31,290 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 20:35:31,294 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 20:35:31,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 08:35:30" (1/3) ... [2020-10-27 20:35:31,295 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5eb0eb86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:35:31, skipping insertion in model container [2020-10-27 20:35:31,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:35:30" (2/3) ... [2020-10-27 20:35:31,296 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5eb0eb86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:35:31, skipping insertion in model container [2020-10-27 20:35:31,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:35:31" (3/3) ... [2020-10-27 20:35:31,298 INFO L111 eAbstractionObserver]: Analyzing ICFG ludcmp.c [2020-10-27 20:35:31,310 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 20:35:31,315 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 20:35:31,328 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 20:35:31,357 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 20:35:31,357 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 20:35:31,357 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 20:35:31,357 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 20:35:31,357 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 20:35:31,358 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 20:35:31,358 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 20:35:31,358 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 20:35:31,377 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states. [2020-10-27 20:35:31,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-27 20:35:31,383 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:35:31,384 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:35:31,384 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:35:31,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:35:31,391 INFO L82 PathProgramCache]: Analyzing trace with hash 636154150, now seen corresponding path program 1 times [2020-10-27 20:35:31,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:35:31,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1885899320] [2020-10-27 20:35:31,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:35:31,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:31,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:31,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:31,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-27 20:35:31,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:35:31,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 255 [2020-10-27 20:35:31,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:31,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:35:31,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:35:31,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:35:31,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 20:35:31,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:35:31,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:31,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:31,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:31,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:35:31,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:35:31,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-10-27 20:35:31,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:31,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:35:31,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:35:31,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:35:31,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:31,985 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 20:35:31,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1885899320] [2020-10-27 20:35:31,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:35:31,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 20:35:31,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137677374] [2020-10-27 20:35:31,996 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 20:35:31,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:35:32,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 20:35:32,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 20:35:32,015 INFO L87 Difference]: Start difference. First operand 68 states. Second operand 3 states. [2020-10-27 20:35:32,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:35:32,289 INFO L93 Difference]: Finished difference Result 132 states and 197 transitions. [2020-10-27 20:35:32,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 20:35:32,291 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-10-27 20:35:32,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:35:32,302 INFO L225 Difference]: With dead ends: 132 [2020-10-27 20:35:32,303 INFO L226 Difference]: Without dead ends: 25 [2020-10-27 20:35:32,308 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 20:35:32,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-27 20:35:32,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 21. [2020-10-27 20:35:32,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-27 20:35:32,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-10-27 20:35:32,361 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 13 [2020-10-27 20:35:32,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:35:32,361 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-10-27 20:35:32,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 20:35:32,362 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-10-27 20:35:32,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-27 20:35:32,363 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:35:32,363 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:35:32,363 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 20:35:32,363 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:35:32,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:35:32,364 INFO L82 PathProgramCache]: Analyzing trace with hash 263975187, now seen corresponding path program 1 times [2020-10-27 20:35:32,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:35:32,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1022952158] [2020-10-27 20:35:32,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:35:32,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:32,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:32,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:32,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-27 20:35:32,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:35:32,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 224 [2020-10-27 20:35:32,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:32,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 20:35:32,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:35:32,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 20:35:32,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:32,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:35:32,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:32,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:32,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:32,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:35:32,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:35:32,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 20:35:32,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:32,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:35:32,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:35:32,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:35:32,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:35:32,789 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 20:35:32,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1022952158] [2020-10-27 20:35:32,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:35:32,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 20:35:32,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475425228] [2020-10-27 20:35:32,800 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 20:35:32,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:35:32,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 20:35:32,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:35:32,803 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 5 states. [2020-10-27 20:35:33,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:35:33,054 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2020-10-27 20:35:33,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 20:35:33,055 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-10-27 20:35:33,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:35:33,056 INFO L225 Difference]: With dead ends: 42 [2020-10-27 20:35:33,056 INFO L226 Difference]: Without dead ends: 27 [2020-10-27 20:35:33,057 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-27 20:35:33,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-27 20:35:33,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2020-10-27 20:35:33,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-27 20:35:33,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-10-27 20:35:33,065 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 13 [2020-10-27 20:35:33,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:35:33,066 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-10-27 20:35:33,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 20:35:33,066 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-10-27 20:35:33,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 20:35:33,067 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:35:33,067 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:35:33,067 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 20:35:33,067 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:35:33,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:35:33,068 INFO L82 PathProgramCache]: Analyzing trace with hash -1988851656, now seen corresponding path program 1 times [2020-10-27 20:35:33,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:35:33,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2006354589] [2020-10-27 20:35:33,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:35:33,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:33,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:33,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:33,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:33,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 20:35:33,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:35:33,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 332 [2020-10-27 20:35:33,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:33,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:35:33,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:35:33,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:35:33,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:35:33,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:35:33,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:33,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:33,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:33,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:35:33,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:35:33,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 20:35:33,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:33,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:35:33,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:35:33,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:35:33,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:33,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:35:33,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2006354589] [2020-10-27 20:35:33,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:35:33,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 20:35:33,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822544711] [2020-10-27 20:35:33,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 20:35:33,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:35:33,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 20:35:33,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 20:35:33,532 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 6 states. [2020-10-27 20:35:33,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:35:33,814 INFO L93 Difference]: Finished difference Result 47 states and 54 transitions. [2020-10-27 20:35:33,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 20:35:33,817 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-27 20:35:33,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:35:33,818 INFO L225 Difference]: With dead ends: 47 [2020-10-27 20:35:33,819 INFO L226 Difference]: Without dead ends: 31 [2020-10-27 20:35:33,819 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-27 20:35:33,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-27 20:35:33,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2020-10-27 20:35:33,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-27 20:35:33,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-10-27 20:35:33,832 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 17 [2020-10-27 20:35:33,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:35:33,832 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-10-27 20:35:33,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 20:35:33,832 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-10-27 20:35:33,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 20:35:33,834 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:35:33,834 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:35:33,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 20:35:33,834 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:35:33,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:35:33,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1189935907, now seen corresponding path program 2 times [2020-10-27 20:35:33,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:35:33,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2035297602] [2020-10-27 20:35:33,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:35:33,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:33,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:33,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:33,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:34,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:34,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:34,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:34,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 20:35:34,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 20:35:34,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 682 [2020-10-27 20:35:34,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:34,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 20:35:34,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:35:34,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 20:35:34,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:34,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:35:34,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:34,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:34,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:34,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:35:34,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:35:34,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 20:35:34,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:34,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:35:34,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:35:34,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:35:34,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:34,645 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:35:34,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2035297602] [2020-10-27 20:35:34,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:35:34,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 20:35:34,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151607653] [2020-10-27 20:35:34,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 20:35:34,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:35:34,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 20:35:34,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:35:34,648 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 5 states. [2020-10-27 20:35:34,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:35:34,744 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2020-10-27 20:35:34,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 20:35:34,744 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-10-27 20:35:34,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:35:34,745 INFO L225 Difference]: With dead ends: 61 [2020-10-27 20:35:34,745 INFO L226 Difference]: Without dead ends: 41 [2020-10-27 20:35:34,746 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:35:34,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-27 20:35:34,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2020-10-27 20:35:34,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-27 20:35:34,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-10-27 20:35:34,755 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 21 [2020-10-27 20:35:34,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:35:34,755 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-10-27 20:35:34,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 20:35:34,755 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-10-27 20:35:34,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 20:35:34,756 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:35:34,756 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:35:34,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 20:35:34,757 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:35:34,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:35:34,757 INFO L82 PathProgramCache]: Analyzing trace with hash -509877537, now seen corresponding path program 1 times [2020-10-27 20:35:34,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:35:34,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1703945654] [2020-10-27 20:35:34,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:35:34,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:34,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:34,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:35,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:35,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 20:35:35,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:35:35,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 309 [2020-10-27 20:35:35,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:35,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:35:35,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:35:35,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 20:35:35,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:35,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:35:35,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:35,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:35,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:35,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:35:35,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:35:35,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 20:35:35,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:35,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:35:35,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:35:35,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:35:35,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:35,206 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:35:35,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1703945654] [2020-10-27 20:35:35,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:35:35,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 20:35:35,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522912362] [2020-10-27 20:35:35,210 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 20:35:35,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:35:35,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 20:35:35,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:35:35,212 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 7 states. [2020-10-27 20:35:35,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:35:35,450 INFO L93 Difference]: Finished difference Result 76 states and 88 transitions. [2020-10-27 20:35:35,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 20:35:35,450 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-10-27 20:35:35,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:35:35,451 INFO L225 Difference]: With dead ends: 76 [2020-10-27 20:35:35,451 INFO L226 Difference]: Without dead ends: 49 [2020-10-27 20:35:35,452 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-10-27 20:35:35,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-27 20:35:35,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 41. [2020-10-27 20:35:35,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-27 20:35:35,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2020-10-27 20:35:35,461 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 21 [2020-10-27 20:35:35,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:35:35,462 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2020-10-27 20:35:35,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 20:35:35,462 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2020-10-27 20:35:35,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 20:35:35,463 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:35:35,463 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:35:35,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 20:35:35,463 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:35:35,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:35:35,464 INFO L82 PathProgramCache]: Analyzing trace with hash -877161978, now seen corresponding path program 2 times [2020-10-27 20:35:35,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:35:35,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [411699775] [2020-10-27 20:35:35,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:35:35,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:35,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:35,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:35,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:35,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 20:35:35,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:35:35,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 330 [2020-10-27 20:35:35,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:35,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:35:35,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:35:35,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 20:35:35,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:35,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:35:35,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:35,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:35,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:35,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:35:35,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:35:35,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 20:35:35,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:35,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:35:35,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:35:35,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:35:35,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:35,937 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:35:35,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [411699775] [2020-10-27 20:35:35,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:35:35,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 20:35:35,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941967551] [2020-10-27 20:35:35,938 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 20:35:35,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:35:35,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 20:35:35,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-27 20:35:35,939 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand 8 states. [2020-10-27 20:35:36,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:35:36,176 INFO L93 Difference]: Finished difference Result 92 states and 106 transitions. [2020-10-27 20:35:36,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 20:35:36,176 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-10-27 20:35:36,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:35:36,177 INFO L225 Difference]: With dead ends: 92 [2020-10-27 20:35:36,177 INFO L226 Difference]: Without dead ends: 57 [2020-10-27 20:35:36,178 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2020-10-27 20:35:36,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-27 20:35:36,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 49. [2020-10-27 20:35:36,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-27 20:35:36,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2020-10-27 20:35:36,188 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 25 [2020-10-27 20:35:36,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:35:36,188 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2020-10-27 20:35:36,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 20:35:36,188 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2020-10-27 20:35:36,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 20:35:36,189 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:35:36,189 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:35:36,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 20:35:36,190 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:35:36,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:35:36,190 INFO L82 PathProgramCache]: Analyzing trace with hash -729197139, now seen corresponding path program 3 times [2020-10-27 20:35:36,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:35:36,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1714537432] [2020-10-27 20:35:36,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:35:36,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:36,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:36,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:36,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:36,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 20:35:36,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:35:36,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 336 [2020-10-27 20:35:36,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:36,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 20:35:36,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:35:36,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 20:35:36,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:36,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:35:36,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:36,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:36,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:36,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:35:36,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:35:36,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 20:35:36,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:36,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:35:36,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:35:36,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:35:36,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:36,681 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:35:36,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1714537432] [2020-10-27 20:35:36,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:35:36,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 20:35:36,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41487198] [2020-10-27 20:35:36,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 20:35:36,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:35:36,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 20:35:36,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:35:36,684 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand 9 states. [2020-10-27 20:35:36,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:35:36,971 INFO L93 Difference]: Finished difference Result 156 states and 179 transitions. [2020-10-27 20:35:36,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 20:35:36,971 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-10-27 20:35:36,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:35:36,973 INFO L225 Difference]: With dead ends: 156 [2020-10-27 20:35:36,973 INFO L226 Difference]: Without dead ends: 113 [2020-10-27 20:35:36,977 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-10-27 20:35:36,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-27 20:35:36,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 71. [2020-10-27 20:35:36,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-27 20:35:37,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 82 transitions. [2020-10-27 20:35:37,001 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 82 transitions. Word has length 29 [2020-10-27 20:35:37,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:35:37,002 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 82 transitions. [2020-10-27 20:35:37,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 20:35:37,002 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 82 transitions. [2020-10-27 20:35:37,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 20:35:37,004 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:35:37,005 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:35:37,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 20:35:37,005 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:35:37,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:35:37,006 INFO L82 PathProgramCache]: Analyzing trace with hash -306495313, now seen corresponding path program 1 times [2020-10-27 20:35:37,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:35:37,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1484025696] [2020-10-27 20:35:37,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:35:37,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:37,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:37,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:37,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:37,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 20:35:37,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:35:37,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 257 [2020-10-27 20:35:37,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:37,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 20:35:37,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:35:37,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 20:35:37,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:37,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:35:37,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:37,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:37,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:37,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:35:37,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:35:37,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-27 20:35:37,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:37,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:35:37,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:35:37,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:35:37,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:37,397 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-27 20:35:37,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1484025696] [2020-10-27 20:35:37,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:35:37,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 20:35:37,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420739664] [2020-10-27 20:35:37,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 20:35:37,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:35:37,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 20:35:37,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:35:37,399 INFO L87 Difference]: Start difference. First operand 71 states and 82 transitions. Second operand 5 states. [2020-10-27 20:35:37,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:35:37,596 INFO L93 Difference]: Finished difference Result 136 states and 155 transitions. [2020-10-27 20:35:37,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 20:35:37,597 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2020-10-27 20:35:37,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:35:37,598 INFO L225 Difference]: With dead ends: 136 [2020-10-27 20:35:37,598 INFO L226 Difference]: Without dead ends: 74 [2020-10-27 20:35:37,599 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:35:37,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-27 20:35:37,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 56. [2020-10-27 20:35:37,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-27 20:35:37,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2020-10-27 20:35:37,609 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 29 [2020-10-27 20:35:37,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:35:37,610 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2020-10-27 20:35:37,610 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 20:35:37,610 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2020-10-27 20:35:37,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 20:35:37,611 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:35:37,611 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:35:37,611 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 20:35:37,611 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:35:37,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:35:37,612 INFO L82 PathProgramCache]: Analyzing trace with hash -772608556, now seen corresponding path program 4 times [2020-10-27 20:35:37,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:35:37,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [818039612] [2020-10-27 20:35:37,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:35:37,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:37,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:37,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:37,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:37,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 20:35:37,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:35:37,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 234 [2020-10-27 20:35:37,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:37,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 20:35:37,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:35:37,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 20:35:37,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:37,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:35:37,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:37,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:38,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:38,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:35:38,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:35:38,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:35:38,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:38,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:35:38,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:35:38,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:35:38,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:38,012 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:35:38,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [818039612] [2020-10-27 20:35:38,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:35:38,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 20:35:38,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220709888] [2020-10-27 20:35:38,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 20:35:38,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:35:38,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 20:35:38,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-27 20:35:38,014 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand 10 states. [2020-10-27 20:35:38,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:35:38,381 INFO L93 Difference]: Finished difference Result 121 states and 136 transitions. [2020-10-27 20:35:38,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 20:35:38,381 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2020-10-27 20:35:38,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:35:38,382 INFO L225 Difference]: With dead ends: 121 [2020-10-27 20:35:38,383 INFO L226 Difference]: Without dead ends: 78 [2020-10-27 20:35:38,383 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2020-10-27 20:35:38,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-27 20:35:38,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 60. [2020-10-27 20:35:38,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-27 20:35:38,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2020-10-27 20:35:38,399 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 33 [2020-10-27 20:35:38,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:35:38,400 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2020-10-27 20:35:38,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 20:35:38,400 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2020-10-27 20:35:38,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 20:35:38,402 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:35:38,402 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:35:38,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 20:35:38,402 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:35:38,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:35:38,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1391860347, now seen corresponding path program 5 times [2020-10-27 20:35:38,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:35:38,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [902649770] [2020-10-27 20:35:38,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:35:38,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-27 20:35:38,428 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-27 20:35:38,429 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-27 20:35:38,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 20:35:38,464 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 08:35:38 BoogieIcfgContainer [2020-10-27 20:35:38,464 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-27 20:35:38,468 INFO L168 Benchmark]: Toolchain (without parser) took 8412.76 ms. Allocated memory was 168.8 MB in the beginning and 244.3 MB in the end (delta: 75.5 MB). Free memory was 144.1 MB in the beginning and 200.0 MB in the end (delta: -55.9 MB). Peak memory consumption was 21.4 MB. Max. memory is 8.0 GB. [2020-10-27 20:35:38,469 INFO L168 Benchmark]: CDTParser took 0.58 ms. Allocated memory is still 125.8 MB. Free memory was 100.4 MB in the beginning and 100.4 MB in the end (delta: 69.7 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-27 20:35:38,470 INFO L168 Benchmark]: CACSL2BoogieTranslator took 350.39 ms. Allocated memory is still 168.8 MB. Free memory was 143.5 MB in the beginning and 131.9 MB in the end (delta: 11.7 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2020-10-27 20:35:38,476 INFO L168 Benchmark]: Boogie Preprocessor took 127.65 ms. Allocated memory is still 168.8 MB. Free memory was 131.9 MB in the beginning and 129.6 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-27 20:35:38,477 INFO L168 Benchmark]: RCFGBuilder took 747.80 ms. Allocated memory is still 168.8 MB. Free memory was 129.6 MB in the beginning and 135.8 MB in the end (delta: -6.2 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2020-10-27 20:35:38,478 INFO L168 Benchmark]: TraceAbstraction took 7174.43 ms. Allocated memory was 168.8 MB in the beginning and 244.3 MB in the end (delta: 75.5 MB). Free memory was 135.4 MB in the beginning and 200.0 MB in the end (delta: -64.5 MB). Peak memory consumption was 10.9 MB. Max. memory is 8.0 GB. [2020-10-27 20:35:38,492 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.58 ms. Allocated memory is still 125.8 MB. Free memory was 100.4 MB in the beginning and 100.4 MB in the end (delta: 69.7 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 350.39 ms. Allocated memory is still 168.8 MB. Free memory was 143.5 MB in the beginning and 131.9 MB in the end (delta: 11.7 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 127.65 ms. Allocated memory is still 168.8 MB. Free memory was 131.9 MB in the beginning and 129.6 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 747.80 ms. Allocated memory is still 168.8 MB. Free memory was 129.6 MB in the beginning and 135.8 MB in the end (delta: -6.2 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 7174.43 ms. Allocated memory was 168.8 MB in the beginning and 244.3 MB in the end (delta: 75.5 MB). Free memory was 135.4 MB in the beginning and 200.0 MB in the end (delta: -64.5 MB). Peak memory consumption was 10.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 3]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of to_real at line 98, overapproximation of someBinaryArithmeticDOUBLEoperation at line 100. Possible FailurePath: [L71] double a[50][50], b[50], x[50]; [L88] int i, j, nmax = 50, n = 5, chkerr; [L89] double eps, w; [L91] eps = 1.0e-6 [L93] i = 0 [L93] COND TRUE i <= n [L95] w = 0.0 [L96] j = 0 [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) [L99] COND TRUE i == j [L99] EXPR a[i][j] [L99] a[i][j] *= 10.0 [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) [L99] COND FALSE !(i == j) [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) [L99] COND FALSE !(i == j) [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) [L99] COND FALSE !(i == j) [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) [L99] COND FALSE !(i == j) [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) [L99] COND FALSE !(i == j) [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ [L96] COND FALSE !(j <= n) [L102] CALL __VERIFIER_assert(i==2) [L6] COND TRUE !(cond) [L7] CALL reach_error() [L3] __assert_fail("0", "ludcmp.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 68 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 7.0s, OverallIterations: 10, TraceHistogramMax: 6, AutomataDifference: 2.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 206 SDtfs, 258 SDslu, 247 SDs, 0 SdLazy, 619 SolverSat, 78 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 100 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=71occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 116 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 4.1s InterpolantComputationTime, 238 NumberOfCodeBlocks, 238 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 192 ConstructedInterpolants, 0 QuantifiedInterpolants, 22184 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 4 PerfectInterpolantSequences, 34/129 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 could not prove your program: unable to determine feasibility of some traces Received shutdown request...