/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/loop-acceleration/underapprox_2-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 20:14:56,216 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 20:14:56,219 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 20:14:56,254 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 20:14:56,255 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 20:14:56,257 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 20:14:56,258 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 20:14:56,261 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 20:14:56,263 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 20:14:56,264 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 20:14:56,266 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 20:14:56,268 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 20:14:56,268 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 20:14:56,270 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 20:14:56,271 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 20:14:56,273 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 20:14:56,274 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 20:14:56,276 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 20:14:56,278 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 20:14:56,281 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 20:14:56,283 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 20:14:56,285 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 20:14:56,287 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 20:14:56,288 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 20:14:56,314 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 20:14:56,315 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 20:14:56,320 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 20:14:56,322 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 20:14:56,323 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 20:14:56,327 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 20:14:56,327 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 20:14:56,328 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 20:14:56,330 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 20:14:56,331 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 20:14:56,333 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 20:14:56,333 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 20:14:56,334 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 20:14:56,334 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 20:14:56,334 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 20:14:56,336 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 20:14:56,337 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 20:14:56,338 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 20:14:56,398 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 20:14:56,399 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 20:14:56,403 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 20:14:56,404 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 20:14:56,404 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 20:14:56,404 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 20:14:56,405 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 20:14:56,405 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 20:14:56,405 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 20:14:56,405 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 20:14:56,406 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 20:14:56,407 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 20:14:56,407 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 20:14:56,407 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 20:14:56,407 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 20:14:56,407 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 20:14:56,408 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 20:14:56,408 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 20:14:56,408 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 20:14:56,409 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 20:14:56,409 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 20:14:56,409 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 20:14:56,409 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 20:14:56,409 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 20:14:56,410 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 20:14:56,410 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 20:14:56,410 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 20:14:56,410 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 20:14:56,411 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 20:14:56,411 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 20:14:56,826 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 20:14:56,862 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 20:14:56,866 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 20:14:56,867 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 20:14:56,868 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 20:14:56,869 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/underapprox_2-1.c [2020-10-27 20:14:56,954 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0ed4d593f/3e4a8cf7699a47fd9f38ff101ddb05f1/FLAGd89ddf2a4 [2020-10-27 20:14:57,668 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 20:14:57,668 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/underapprox_2-1.c [2020-10-27 20:14:57,676 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0ed4d593f/3e4a8cf7699a47fd9f38ff101ddb05f1/FLAGd89ddf2a4 [2020-10-27 20:14:58,025 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0ed4d593f/3e4a8cf7699a47fd9f38ff101ddb05f1 [2020-10-27 20:14:58,031 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 20:14:58,039 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 20:14:58,044 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 20:14:58,044 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 20:14:58,048 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 20:14:58,049 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:14:58" (1/1) ... [2020-10-27 20:14:58,052 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@132a9d6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:14:58, skipping insertion in model container [2020-10-27 20:14:58,052 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:14:58" (1/1) ... [2020-10-27 20:14:58,061 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 20:14:58,074 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 20:14:58,233 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:14:58,243 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 20:14:58,259 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:14:58,275 INFO L208 MainTranslator]: Completed translation [2020-10-27 20:14:58,276 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:14:58 WrapperNode [2020-10-27 20:14:58,276 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 20:14:58,277 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 20:14:58,278 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 20:14:58,278 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 20:14:58,290 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:14:58" (1/1) ... [2020-10-27 20:14:58,291 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:14:58" (1/1) ... [2020-10-27 20:14:58,298 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:14:58" (1/1) ... [2020-10-27 20:14:58,299 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:14:58" (1/1) ... [2020-10-27 20:14:58,304 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:14:58" (1/1) ... [2020-10-27 20:14:58,308 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:14:58" (1/1) ... [2020-10-27 20:14:58,309 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:14:58" (1/1) ... [2020-10-27 20:14:58,311 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 20:14:58,312 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 20:14:58,312 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 20:14:58,312 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 20:14:58,313 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:14:58" (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 20:14:58,386 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 20:14:58,387 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 20:14:58,387 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 20:14:58,387 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 20:14:58,387 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 20:14:58,388 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 20:14:58,388 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 20:14:58,388 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 20:14:58,388 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 20:14:58,388 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 20:14:58,388 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 20:14:58,389 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 20:14:58,389 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 20:14:58,389 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 20:14:58,389 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 20:14:58,389 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 20:14:58,390 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 20:14:58,679 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 20:14:58,679 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 20:14:58,681 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:14:58 BoogieIcfgContainer [2020-10-27 20:14:58,681 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 20:14:58,683 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 20:14:58,683 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 20:14:58,688 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 20:14:58,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 08:14:58" (1/3) ... [2020-10-27 20:14:58,689 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@80780ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:14:58, skipping insertion in model container [2020-10-27 20:14:58,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:14:58" (2/3) ... [2020-10-27 20:14:58,690 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@80780ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:14:58, skipping insertion in model container [2020-10-27 20:14:58,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:14:58" (3/3) ... [2020-10-27 20:14:58,691 INFO L111 eAbstractionObserver]: Analyzing ICFG underapprox_2-1.c [2020-10-27 20:14:58,706 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 20:14:58,711 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 20:14:58,726 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 20:14:58,818 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 20:14:58,819 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 20:14:58,819 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 20:14:58,822 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 20:14:58,822 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 20:14:58,822 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 20:14:58,823 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 20:14:58,823 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 20:14:58,847 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-10-27 20:14:58,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-27 20:14:58,854 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:14:58,855 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:14:58,856 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:14:58,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:14:58,869 INFO L82 PathProgramCache]: Analyzing trace with hash 783588435, now seen corresponding path program 1 times [2020-10-27 20:14:58,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:14:58,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1393599929] [2020-10-27 20:14:58,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:14:59,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:59,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:59,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:59,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:59,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 20:14:59,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:14:59,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 338 [2020-10-27 20:14:59,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:59,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:14:59,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 20:14:59,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:14:59,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 20:14:59,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:14:59,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:59,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:59,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:59,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:14:59,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:59,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 20:14:59,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:59,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:14:59,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:14:59,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:14:59,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:59,563 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 20:14:59,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1393599929] [2020-10-27 20:14:59,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:14:59,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 20:14:59,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849311612] [2020-10-27 20:14:59,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 20:14:59,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:14:59,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 20:14:59,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 20:14:59,590 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 3 states. [2020-10-27 20:14:59,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:14:59,664 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2020-10-27 20:14:59,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 20:14:59,666 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-27 20:14:59,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:14:59,674 INFO L225 Difference]: With dead ends: 34 [2020-10-27 20:14:59,674 INFO L226 Difference]: Without dead ends: 13 [2020-10-27 20:14:59,678 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 20:14:59,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-10-27 20:14:59,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-10-27 20:14:59,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-27 20:14:59,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-10-27 20:14:59,721 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 12 [2020-10-27 20:14:59,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:14:59,722 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-10-27 20:14:59,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 20:14:59,722 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-10-27 20:14:59,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-27 20:14:59,723 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:14:59,723 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:14:59,723 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 20:14:59,724 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:14:59,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:14:59,725 INFO L82 PathProgramCache]: Analyzing trace with hash 669071831, now seen corresponding path program 1 times [2020-10-27 20:14:59,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:14:59,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1814583355] [2020-10-27 20:14:59,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:14:59,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:59,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:59,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:59,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:59,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 20:14:59,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:14:59,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 193 [2020-10-27 20:14:59,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:59,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:14:59,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:14:59,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:14:59,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:15:00,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:15:00,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:15:00,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:00,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:15:00,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:15:00,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:15:00,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 20:15:00,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:15:00,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:15:00,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:15:00,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:15:00,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:15:00,053 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 20:15:00,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1814583355] [2020-10-27 20:15:00,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:15:00,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 20:15:00,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482700908] [2020-10-27 20:15:00,056 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 20:15:00,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:15:00,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 20:15:00,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 20:15:00,058 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 6 states. [2020-10-27 20:15:00,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:15:00,155 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2020-10-27 20:15:00,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:15:00,156 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-10-27 20:15:00,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:15:00,157 INFO L225 Difference]: With dead ends: 20 [2020-10-27 20:15:00,157 INFO L226 Difference]: Without dead ends: 14 [2020-10-27 20:15:00,159 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:15:00,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-27 20:15:00,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-10-27 20:15:00,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-27 20:15:00,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-10-27 20:15:00,167 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-10-27 20:15:00,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:15:00,168 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-10-27 20:15:00,168 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 20:15:00,168 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-10-27 20:15:00,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-27 20:15:00,169 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:15:00,169 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:15:00,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 20:15:00,169 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:15:00,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:15:00,170 INFO L82 PathProgramCache]: Analyzing trace with hash 396678398, now seen corresponding path program 1 times [2020-10-27 20:15:00,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:15:00,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1258399040] [2020-10-27 20:15:00,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:15:00,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:15:00,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:00,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:00,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:15:00,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-27 20:15:00,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:15:00,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 189 [2020-10-27 20:15:00,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:15:00,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:15:00,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:15:00,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 20:15:00,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:15:00,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:15:00,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:15:00,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:00,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:15:00,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:15:00,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:15:00,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 20:15:00,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:15:00,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:15:00,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:15:00,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:15:00,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:15:00,493 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 20:15:00,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1258399040] [2020-10-27 20:15:00,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:15:00,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 20:15:00,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751536990] [2020-10-27 20:15:00,495 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 20:15:00,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:15:00,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 20:15:00,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:15:00,497 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 7 states. [2020-10-27 20:15:00,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:15:00,630 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2020-10-27 20:15:00,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 20:15:00,631 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2020-10-27 20:15:00,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:15:00,632 INFO L225 Difference]: With dead ends: 21 [2020-10-27 20:15:00,632 INFO L226 Difference]: Without dead ends: 15 [2020-10-27 20:15:00,633 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:15:00,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-27 20:15:00,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-27 20:15:00,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-27 20:15:00,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-10-27 20:15:00,639 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2020-10-27 20:15:00,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:15:00,640 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-10-27 20:15:00,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 20:15:00,640 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-10-27 20:15:00,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-27 20:15:00,641 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:15:00,641 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:15:00,641 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 20:15:00,641 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:15:00,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:15:00,642 INFO L82 PathProgramCache]: Analyzing trace with hash 542416567, now seen corresponding path program 2 times [2020-10-27 20:15:00,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:15:00,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [295964345] [2020-10-27 20:15:00,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:15:00,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:15:00,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:00,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:00,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:15:00,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 20:15:00,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:15:00,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 319 [2020-10-27 20:15:00,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:15:00,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:15:00,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:15:00,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 20:15:00,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:15:01,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:15:01,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:15:01,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:01,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:15:01,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:15:01,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:15:01,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:15:01,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:15:01,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:15:01,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:15:01,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:15:01,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:15:01,157 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:15:01,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [295964345] [2020-10-27 20:15:01,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:15:01,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 20:15:01,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447634317] [2020-10-27 20:15:01,163 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 20:15:01,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:15:01,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 20:15:01,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-27 20:15:01,166 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 8 states. [2020-10-27 20:15:01,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:15:01,355 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-10-27 20:15:01,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 20:15:01,356 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2020-10-27 20:15:01,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:15:01,356 INFO L225 Difference]: With dead ends: 22 [2020-10-27 20:15:01,357 INFO L226 Difference]: Without dead ends: 16 [2020-10-27 20:15:01,358 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:15:01,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-27 20:15:01,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-27 20:15:01,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-27 20:15:01,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-10-27 20:15:01,364 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2020-10-27 20:15:01,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:15:01,365 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-10-27 20:15:01,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 20:15:01,365 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-10-27 20:15:01,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-27 20:15:01,366 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:15:01,366 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:15:01,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 20:15:01,367 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:15:01,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:15:01,367 INFO L82 PathProgramCache]: Analyzing trace with hash 765332510, now seen corresponding path program 3 times [2020-10-27 20:15:01,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:15:01,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [70162605] [2020-10-27 20:15:01,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:15:01,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:15:01,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:01,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:01,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:15:01,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 20:15:01,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:15:01,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 231 [2020-10-27 20:15:01,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:15:01,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 20:15:01,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:15:01,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 20:15:01,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:15:01,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:15:01,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:15:01,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:01,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:15:01,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:15:01,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:15:01,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:15:01,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:15:01,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:15:01,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:15:01,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:15:01,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:15:01,737 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 20:15:01,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [70162605] [2020-10-27 20:15:01,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:15:01,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 20:15:01,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291162818] [2020-10-27 20:15:01,738 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 20:15:01,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:15:01,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 20:15:01,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:15:01,740 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 9 states. [2020-10-27 20:15:01,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:15:01,979 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2020-10-27 20:15:01,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 20:15:01,980 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2020-10-27 20:15:01,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:15:01,981 INFO L225 Difference]: With dead ends: 23 [2020-10-27 20:15:01,981 INFO L226 Difference]: Without dead ends: 17 [2020-10-27 20:15:01,982 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:15:01,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-27 20:15:01,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-27 20:15:01,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-27 20:15:01,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-10-27 20:15:01,991 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2020-10-27 20:15:01,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:15:01,991 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-10-27 20:15:01,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 20:15:01,991 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-10-27 20:15:01,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 20:15:01,992 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:15:01,992 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:15:01,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 20:15:01,992 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:15:01,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:15:01,993 INFO L82 PathProgramCache]: Analyzing trace with hash -914207849, now seen corresponding path program 4 times [2020-10-27 20:15:01,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:15:01,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1562523546] [2020-10-27 20:15:01,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:15:02,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:15:02,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:02,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:02,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:15:02,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 20:15:02,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:15:02,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 433 [2020-10-27 20:15:02,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:15:02,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:15:02,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:15:02,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 20:15:02,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:15:02,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:15:02,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:15:02,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:02,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:15:02,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:15:02,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:15:02,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:15:02,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:15:02,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:15:02,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:15:02,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:15:02,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:15:02,587 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:15:02,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1562523546] [2020-10-27 20:15:02,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:15:02,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 20:15:02,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972730285] [2020-10-27 20:15:02,591 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 20:15:02,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:15:02,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 20:15:02,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 20:15:02,598 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 8 states. [2020-10-27 20:15:02,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:15:02,834 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-10-27 20:15:02,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 20:15:02,835 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-10-27 20:15:02,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:15:02,836 INFO L225 Difference]: With dead ends: 24 [2020-10-27 20:15:02,836 INFO L226 Difference]: Without dead ends: 18 [2020-10-27 20:15:02,836 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:15:02,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-27 20:15:02,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-27 20:15:02,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-27 20:15:02,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-10-27 20:15:02,842 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2020-10-27 20:15:02,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:15:02,843 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-10-27 20:15:02,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 20:15:02,843 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-10-27 20:15:02,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 20:15:02,844 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:15:02,844 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:15:02,844 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 20:15:02,844 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:15:02,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:15:02,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1440351426, now seen corresponding path program 5 times [2020-10-27 20:15:02,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:15:02,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [670208204] [2020-10-27 20:15:02,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:15:02,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:15:02,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:02,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:03,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:15:03,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 20:15:03,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:15:03,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 250 [2020-10-27 20:15:03,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:15:03,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 20:15:03,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:15:03,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:15:03,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:15:03,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:15:03,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:15:03,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:03,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:15:03,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:15:03,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:15:03,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:15:03,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:15:03,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:15:03,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:15:03,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:15:03,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:15:03,225 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 20:15:03,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [670208204] [2020-10-27 20:15:03,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:15:03,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 20:15:03,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985220496] [2020-10-27 20:15:03,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 20:15:03,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:15:03,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 20:15:03,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:15:03,227 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 9 states. [2020-10-27 20:15:03,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:15:03,501 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2020-10-27 20:15:03,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 20:15:03,501 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2020-10-27 20:15:03,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:15:03,502 INFO L225 Difference]: With dead ends: 25 [2020-10-27 20:15:03,502 INFO L226 Difference]: Without dead ends: 19 [2020-10-27 20:15:03,503 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-27 20:15:03,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-27 20:15:03,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-27 20:15:03,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-27 20:15:03,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-10-27 20:15:03,510 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2020-10-27 20:15:03,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:15:03,510 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-10-27 20:15:03,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 20:15:03,510 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-10-27 20:15:03,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 20:15:03,511 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:15:03,511 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:15:03,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 20:15:03,511 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:15:03,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:15:03,512 INFO L82 PathProgramCache]: Analyzing trace with hash -570933129, now seen corresponding path program 6 times [2020-10-27 20:15:03,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:15:03,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [62973419] [2020-10-27 20:15:03,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:15:03,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-27 20:15:03,525 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-27 20:15:03,526 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-27 20:15:03,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 20:15:03,546 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 08:15:03 BoogieIcfgContainer [2020-10-27 20:15:03,546 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-27 20:15:03,549 INFO L168 Benchmark]: Toolchain (without parser) took 5514.50 ms. Allocated memory was 157.3 MB in the beginning and 207.6 MB in the end (delta: 50.3 MB). Free memory was 133.5 MB in the beginning and 162.1 MB in the end (delta: -28.6 MB). Peak memory consumption was 22.5 MB. Max. memory is 8.0 GB. [2020-10-27 20:15:03,549 INFO L168 Benchmark]: CDTParser took 0.67 ms. Allocated memory is still 157.3 MB. Free memory is still 130.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-27 20:15:03,550 INFO L168 Benchmark]: CACSL2BoogieTranslator took 233.03 ms. Allocated memory is still 157.3 MB. Free memory was 132.8 MB in the beginning and 123.7 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-27 20:15:03,551 INFO L168 Benchmark]: Boogie Preprocessor took 33.60 ms. Allocated memory is still 157.3 MB. Free memory was 123.7 MB in the beginning and 122.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-27 20:15:03,552 INFO L168 Benchmark]: RCFGBuilder took 369.39 ms. Allocated memory is still 157.3 MB. Free memory was 122.3 MB in the beginning and 110.0 MB in the end (delta: 12.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-10-27 20:15:03,552 INFO L168 Benchmark]: TraceAbstraction took 4863.20 ms. Allocated memory was 157.3 MB in the beginning and 207.6 MB in the end (delta: 50.3 MB). Free memory was 109.6 MB in the beginning and 162.1 MB in the end (delta: -52.4 MB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-27 20:15:03,556 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.67 ms. Allocated memory is still 157.3 MB. Free memory is still 130.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 233.03 ms. Allocated memory is still 157.3 MB. Free memory was 132.8 MB in the beginning and 123.7 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 33.60 ms. Allocated memory is still 157.3 MB. Free memory was 123.7 MB in the beginning and 122.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 369.39 ms. Allocated memory is still 157.3 MB. Free memory was 122.3 MB in the beginning and 110.0 MB in the end (delta: 12.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4863.20 ms. Allocated memory was 157.3 MB in the beginning and 207.6 MB in the end (delta: 50.3 MB). Free memory was 109.6 MB in the beginning and 162.1 MB in the end (delta: -52.4 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L13] unsigned int x = 0; [L14] unsigned int y = 1; [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 [L16] COND FALSE !(x < 6) [L21] CALL __VERIFIER_assert(x != 6) [L6] COND TRUE !(cond) [L7] CALL reach_error() [L3] __assert_fail("0", "underapprox_2-1.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.7s, OverallIterations: 8, TraceHistogramMax: 6, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 83 SDtfs, 45 SDslu, 167 SDs, 0 SdLazy, 249 SolverSat, 61 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 78 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=0, 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, 7 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.8s InterpolantComputationTime, 117 NumberOfCodeBlocks, 117 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 92 ConstructedInterpolants, 0 QuantifiedInterpolants, 6692 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 2 PerfectInterpolantSequences, 0/35 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...